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 int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
 905 {
 906         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 907
 908         if (new_mtu > adapter->req_mtu || new_mtu < adapter->min_mtu)
 909                 return -EINVAL;
 910
 911         netdev->mtu = new_mtu;
 912         return 0;
 913 }
 914
 915 static void ibmvnic_tx_timeout(struct net_device *dev)
 916 {
 917         struct ibmvnic_adapter *adapter = netdev_priv(dev);
 918         int rc;
 919
 920         /* Adapter timed out, resetting it */
 921         release_sub_crqs(adapter);
 922         rc = ibmvnic_reset_crq(adapter);
 923         if (rc)
 924                 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
 925         else
 926                 ibmvnic_send_crq_init(adapter);
 927 }
 928
 929 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
 930                                   struct ibmvnic_rx_buff *rx_buff)
 931 {
 932         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
 933
 934         rx_buff->skb = NULL;
 935
 936         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
 937         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
 938
 939         atomic_dec(&pool->available);
 940 }
 941
 942 static int ibmvnic_poll(struct napi_struct *napi, int budget)
 943 {
 944         struct net_device *netdev = napi->dev;
 945         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 946         int scrq_num = (int)(napi - adapter->napi);
 947         int frames_processed = 0;
 948 restart_poll:
 949         while (frames_processed < budget) {
 950                 struct sk_buff *skb;
 951                 struct ibmvnic_rx_buff *rx_buff;
 952                 union sub_crq *next;
 953                 u32 length;
 954                 u16 offset;
 955                 u8 flags = 0;
 956
 957                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
 958                         break;
 959                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
 960                 rx_buff =
 961                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
 962                                                           rx_comp.correlator);
 963                 /* do error checking */
 964                 if (next->rx_comp.rc) {
 965                         netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
 966                         /* free the entry */
 967                         next->rx_comp.first = 0;
 968                         remove_buff_from_pool(adapter, rx_buff);
 969                         break;
 970                 }
 971
 972                 length = be32_to_cpu(next->rx_comp.len);
 973                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
 974                 flags = next->rx_comp.flags;
 975                 skb = rx_buff->skb;
 976                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
 977                                         length);
 978                 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
 979                 /* free the entry */
 980                 next->rx_comp.first = 0;
 981                 remove_buff_from_pool(adapter, rx_buff);
 982
 983                 skb_put(skb, length);
 984                 skb->protocol = eth_type_trans(skb, netdev);
 985
 986                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
 987                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
 988                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 989                 }
 990
 991                 length = skb->len;
 992                 napi_gro_receive(napi, skb); /* send it up */
 993                 netdev->stats.rx_packets++;
 994                 netdev->stats.rx_bytes += length;
 995                 frames_processed++;
 996         }
 997         replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
 998
 999         if (frames_processed < budget) {
1000                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1001                 napi_complete(napi);
1002                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1003                     napi_reschedule(napi)) {
1004                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1005                         goto restart_poll;
1006                 }
1007         }
1008         return frames_processed;
1009 }
1010
1011 #ifdef CONFIG_NET_POLL_CONTROLLER
1012 static void ibmvnic_netpoll_controller(struct net_device *dev)
1013 {
1014         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1015         int i;
1016
1017         replenish_pools(netdev_priv(dev));
1018         for (i = 0; i < adapter->req_rx_queues; i++)
1019                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1020                                      adapter->rx_scrq[i]);
1021 }
1022 #endif
1023
1024 static const struct net_device_ops ibmvnic_netdev_ops = {
1025         .ndo_open               = ibmvnic_open,
1026         .ndo_stop               = ibmvnic_close,
1027         .ndo_start_xmit         = ibmvnic_xmit,
1028         .ndo_set_rx_mode        = ibmvnic_set_multi,
1029         .ndo_set_mac_address    = ibmvnic_set_mac,
1030         .ndo_validate_addr      = eth_validate_addr,
1031         .ndo_change_mtu         = ibmvnic_change_mtu,
1032         .ndo_tx_timeout         = ibmvnic_tx_timeout,
1033 #ifdef CONFIG_NET_POLL_CONTROLLER
1034         .ndo_poll_controller    = ibmvnic_netpoll_controller,
1035 #endif
1036 };
1037
1038 /* ethtool functions */
1039
1040 static int ibmvnic_get_settings(struct net_device *netdev,
1041                                 struct ethtool_cmd *cmd)
1042 {
1043         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1044                           SUPPORTED_FIBRE);
1045         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1046                             ADVERTISED_FIBRE);
1047         ethtool_cmd_speed_set(cmd, SPEED_1000);
1048         cmd->duplex = DUPLEX_FULL;
1049         cmd->port = PORT_FIBRE;
1050         cmd->phy_address = 0;
1051         cmd->transceiver = XCVR_INTERNAL;
1052         cmd->autoneg = AUTONEG_ENABLE;
1053         cmd->maxtxpkt = 0;
1054         cmd->maxrxpkt = 1;
1055         return 0;
1056 }
1057
1058 static void ibmvnic_get_drvinfo(struct net_device *dev,
1059                                 struct ethtool_drvinfo *info)
1060 {
1061         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1062         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1063 }
1064
1065 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1066 {
1067         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1068
1069         return adapter->msg_enable;
1070 }
1071
1072 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1073 {
1074         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1075
1076         adapter->msg_enable = data;
1077 }
1078
1079 static u32 ibmvnic_get_link(struct net_device *netdev)
1080 {
1081         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1082
1083         /* Don't need to send a query because we request a logical link up at
1084          * init and then we wait for link state indications
1085          */
1086         return adapter->logical_link_state;
1087 }
1088
1089 static void ibmvnic_get_ringparam(struct net_device *netdev,
1090                                   struct ethtool_ringparam *ring)
1091 {
1092         ring->rx_max_pending = 0;
1093         ring->tx_max_pending = 0;
1094         ring->rx_mini_max_pending = 0;
1095         ring->rx_jumbo_max_pending = 0;
1096         ring->rx_pending = 0;
1097         ring->tx_pending = 0;
1098         ring->rx_mini_pending = 0;
1099         ring->rx_jumbo_pending = 0;
1100 }
1101
1102 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1103 {
1104         int i;
1105
1106         if (stringset != ETH_SS_STATS)
1107                 return;
1108
1109         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1110                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1111 }
1112
1113 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1114 {
1115         switch (sset) {
1116         case ETH_SS_STATS:
1117                 return ARRAY_SIZE(ibmvnic_stats);
1118         default:
1119                 return -EOPNOTSUPP;
1120         }
1121 }
1122
1123 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1124                                       struct ethtool_stats *stats, u64 *data)
1125 {
1126         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1127         union ibmvnic_crq crq;
1128         int i;
1129
1130         memset(&crq, 0, sizeof(crq));
1131         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1132         crq.request_statistics.cmd = REQUEST_STATISTICS;
1133         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1134         crq.request_statistics.len =
1135             cpu_to_be32(sizeof(struct ibmvnic_statistics));
1136         ibmvnic_send_crq(adapter, &crq);
1137
1138         /* Wait for data to be written */
1139         init_completion(&adapter->stats_done);
1140         wait_for_completion(&adapter->stats_done);
1141
1142         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1143                 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1144 }
1145
1146 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1147         .get_settings           = ibmvnic_get_settings,
1148         .get_drvinfo            = ibmvnic_get_drvinfo,
1149         .get_msglevel           = ibmvnic_get_msglevel,
1150         .set_msglevel           = ibmvnic_set_msglevel,
1151         .get_link               = ibmvnic_get_link,
1152         .get_ringparam          = ibmvnic_get_ringparam,
1153         .get_strings            = ibmvnic_get_strings,
1154         .get_sset_count         = ibmvnic_get_sset_count,
1155         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
1156 };
1157
1158 /* Routines for managing CRQs/sCRQs  */
1159
1160 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1161                                   struct ibmvnic_sub_crq_queue *scrq)
1162 {
1163         struct device *dev = &adapter->vdev->dev;
1164         long rc;
1165
1166         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1167
1168         /* Close the sub-crqs */
1169         do {
1170                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1171                                         adapter->vdev->unit_address,
1172                                         scrq->crq_num);
1173         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1174
1175         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1176                          DMA_BIDIRECTIONAL);
1177         free_pages((unsigned long)scrq->msgs, 2);
1178         kfree(scrq);
1179 }
1180
1181 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1182                                                         *adapter)
1183 {
1184         struct device *dev = &adapter->vdev->dev;
1185         struct ibmvnic_sub_crq_queue *scrq;
1186         int rc;
1187
1188         scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1189         if (!scrq)
1190                 return NULL;
1191
1192         scrq->msgs = (union sub_crq *)__get_free_pages(GFP_ATOMIC, 2);
1193         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1194         if (!scrq->msgs) {
1195                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1196                 goto zero_page_failed;
1197         }
1198
1199         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1200                                          DMA_BIDIRECTIONAL);
1201         if (dma_mapping_error(dev, scrq->msg_token)) {
1202                 dev_warn(dev, "Couldn't map crq queue messages page\n");
1203                 goto map_failed;
1204         }
1205
1206         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1207                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1208
1209         if (rc == H_RESOURCE)
1210                 rc = ibmvnic_reset_crq(adapter);
1211
1212         if (rc == H_CLOSED) {
1213                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1214         } else if (rc) {
1215                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1216                 goto reg_failed;
1217         }
1218
1219         scrq->adapter = adapter;
1220         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1221         scrq->cur = 0;
1222         scrq->rx_skb_top = NULL;
1223         spin_lock_init(&scrq->lock);
1224
1225         netdev_dbg(adapter->netdev,
1226                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1227                    scrq->crq_num, scrq->hw_irq, scrq->irq);
1228
1229         return scrq;
1230
1231 reg_failed:
1232         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1233                          DMA_BIDIRECTIONAL);
1234 map_failed:
1235         free_pages((unsigned long)scrq->msgs, 2);
1236 zero_page_failed:
1237         kfree(scrq);
1238
1239         return NULL;
1240 }
1241
1242 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1243 {
1244         int i;
1245
1246         if (adapter->tx_scrq) {
1247                 for (i = 0; i < adapter->req_tx_queues; i++)
1248                         if (adapter->tx_scrq[i]) {
1249                                 free_irq(adapter->tx_scrq[i]->irq,
1250                                          adapter->tx_scrq[i]);
1251                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1252                                 release_sub_crq_queue(adapter,
1253                                                       adapter->tx_scrq[i]);
1254                         }
1255                 adapter->tx_scrq = NULL;
1256         }
1257
1258         if (adapter->rx_scrq) {
1259                 for (i = 0; i < adapter->req_rx_queues; i++)
1260                         if (adapter->rx_scrq[i]) {
1261                                 free_irq(adapter->rx_scrq[i]->irq,
1262                                          adapter->rx_scrq[i]);
1263                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1264                                 release_sub_crq_queue(adapter,
1265                                                       adapter->rx_scrq[i]);
1266                         }
1267                 adapter->rx_scrq = NULL;
1268         }
1269
1270         adapter->requested_caps = 0;
1271 }
1272
1273 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *adapter)
1274 {
1275         int i;
1276
1277         if (adapter->tx_scrq) {
1278                 for (i = 0; i < adapter->req_tx_queues; i++)
1279                         if (adapter->tx_scrq[i])
1280                                 release_sub_crq_queue(adapter,
1281                                                       adapter->tx_scrq[i]);
1282                 adapter->tx_scrq = NULL;
1283         }
1284
1285         if (adapter->rx_scrq) {
1286                 for (i = 0; i < adapter->req_rx_queues; i++)
1287                         if (adapter->rx_scrq[i])
1288                                 release_sub_crq_queue(adapter,
1289                                                       adapter->rx_scrq[i]);
1290                 adapter->rx_scrq = NULL;
1291         }
1292
1293         adapter->requested_caps = 0;
1294 }
1295
1296 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1297                             struct ibmvnic_sub_crq_queue *scrq)
1298 {
1299         struct device *dev = &adapter->vdev->dev;
1300         unsigned long rc;
1301
1302         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1303                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1304         if (rc)
1305                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1306                         scrq->hw_irq, rc);
1307         return rc;
1308 }
1309
1310 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1311                            struct ibmvnic_sub_crq_queue *scrq)
1312 {
1313         struct device *dev = &adapter->vdev->dev;
1314         unsigned long rc;
1315
1316         if (scrq->hw_irq > 0x100000000ULL) {
1317                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1318                 return 1;
1319         }
1320
1321         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1322                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1323         if (rc)
1324                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1325                         scrq->hw_irq, rc);
1326         return rc;
1327 }
1328
1329 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1330                                struct ibmvnic_sub_crq_queue *scrq)
1331 {
1332         struct device *dev = &adapter->vdev->dev;
1333         struct ibmvnic_tx_buff *txbuff;
1334         union sub_crq *next;
1335         int index;
1336         int i, j;
1337         u8 first;
1338
1339 restart_loop:
1340         while (pending_scrq(adapter, scrq)) {
1341                 unsigned int pool = scrq->pool_index;
1342
1343                 next = ibmvnic_next_scrq(adapter, scrq);
1344                 for (i = 0; i < next->tx_comp.num_comps; i++) {
1345                         if (next->tx_comp.rcs[i]) {
1346                                 dev_err(dev, "tx error %x\n",
1347                                         next->tx_comp.rcs[i]);
1348                                 continue;
1349                         }
1350                         index = be32_to_cpu(next->tx_comp.correlators[i]);
1351                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
1352
1353                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1354                                 if (!txbuff->data_dma[j])
1355                                         continue;
1356
1357                                 txbuff->data_dma[j] = 0;
1358                                 txbuff->used_bounce = false;
1359                         }
1360                         /* if sub_crq was sent indirectly */
1361                         first = txbuff->indir_arr[0].generic.first;
1362                         if (first == IBMVNIC_CRQ_CMD) {
1363                                 dma_unmap_single(dev, txbuff->indir_dma,
1364                                                  sizeof(txbuff->indir_arr),
1365                                                  DMA_TO_DEVICE);
1366                         }
1367
1368                         if (txbuff->last_frag)
1369                                 dev_kfree_skb_any(txbuff->skb);
1370
1371                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1372                                                      producer_index] = index;
1373                         adapter->tx_pool[pool].producer_index =
1374                             (adapter->tx_pool[pool].producer_index + 1) %
1375                             adapter->max_tx_entries_per_subcrq;
1376                 }
1377                 /* remove tx_comp scrq*/
1378                 next->tx_comp.first = 0;
1379         }
1380
1381         enable_scrq_irq(adapter, scrq);
1382
1383         if (pending_scrq(adapter, scrq)) {
1384                 disable_scrq_irq(adapter, scrq);
1385                 goto restart_loop;
1386         }
1387
1388         return 0;
1389 }
1390
1391 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1392 {
1393         struct ibmvnic_sub_crq_queue *scrq = instance;
1394         struct ibmvnic_adapter *adapter = scrq->adapter;
1395
1396         disable_scrq_irq(adapter, scrq);
1397         ibmvnic_complete_tx(adapter, scrq);
1398
1399         return IRQ_HANDLED;
1400 }
1401
1402 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1403 {
1404         struct ibmvnic_sub_crq_queue *scrq = instance;
1405         struct ibmvnic_adapter *adapter = scrq->adapter;
1406
1407         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1408                 disable_scrq_irq(adapter, scrq);
1409                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1410         }
1411
1412         return IRQ_HANDLED;
1413 }
1414
1415 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1416 {
1417         struct device *dev = &adapter->vdev->dev;
1418         struct ibmvnic_sub_crq_queue *scrq;
1419         int i = 0, j = 0;
1420         int rc = 0;
1421
1422         for (i = 0; i < adapter->req_tx_queues; i++) {
1423                 scrq = adapter->tx_scrq[i];
1424                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1425
1426                 if (!scrq->irq) {
1427                         rc = -EINVAL;
1428                         dev_err(dev, "Error mapping irq\n");
1429                         goto req_tx_irq_failed;
1430                 }
1431
1432                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1433                                  0, "ibmvnic_tx", scrq);
1434
1435                 if (rc) {
1436                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1437                                 scrq->irq, rc);
1438                         irq_dispose_mapping(scrq->irq);
1439                         goto req_rx_irq_failed;
1440                 }
1441         }
1442
1443         for (i = 0; i < adapter->req_rx_queues; i++) {
1444                 scrq = adapter->rx_scrq[i];
1445                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1446                 if (!scrq->irq) {
1447                         rc = -EINVAL;
1448                         dev_err(dev, "Error mapping irq\n");
1449                         goto req_rx_irq_failed;
1450                 }
1451                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1452                                  0, "ibmvnic_rx", scrq);
1453                 if (rc) {
1454                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1455                                 scrq->irq, rc);
1456                         irq_dispose_mapping(scrq->irq);
1457                         goto req_rx_irq_failed;
1458                 }
1459         }
1460         return rc;
1461
1462 req_rx_irq_failed:
1463         for (j = 0; j < i; j++) {
1464                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1465                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1466         }
1467         i = adapter->req_tx_queues;
1468 req_tx_irq_failed:
1469         for (j = 0; j < i; j++) {
1470                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1471                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1472         }
1473         release_sub_crqs_no_irqs(adapter);
1474         return rc;
1475 }
1476
1477 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1478 {
1479         struct device *dev = &adapter->vdev->dev;
1480         struct ibmvnic_sub_crq_queue **allqueues;
1481         int registered_queues = 0;
1482         union ibmvnic_crq crq;
1483         int total_queues;
1484         int more = 0;
1485         int i;
1486
1487         if (!retry) {
1488                 /* Sub-CRQ entries are 32 byte long */
1489                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1490
1491                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1492                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
1493                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1494                         goto allqueues_failed;
1495                 }
1496
1497                 /* Get the minimum between the queried max and the entries
1498                  * that fit in our PAGE_SIZE
1499                  */
1500                 adapter->req_tx_entries_per_subcrq =
1501                     adapter->max_tx_entries_per_subcrq > entries_page ?
1502                     entries_page : adapter->max_tx_entries_per_subcrq;
1503                 adapter->req_rx_add_entries_per_subcrq =
1504                     adapter->max_rx_add_entries_per_subcrq > entries_page ?
1505                     entries_page : adapter->max_rx_add_entries_per_subcrq;
1506
1507                 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
1508                 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
1509                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
1510
1511                 adapter->req_mtu = adapter->max_mtu;
1512         }
1513
1514         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1515
1516         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1517         if (!allqueues)
1518                 goto allqueues_failed;
1519
1520         for (i = 0; i < total_queues; i++) {
1521                 allqueues[i] = init_sub_crq_queue(adapter);
1522                 if (!allqueues[i]) {
1523                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1524                         break;
1525                 }
1526                 registered_queues++;
1527         }
1528
1529         /* Make sure we were able to register the minimum number of queues */
1530         if (registered_queues <
1531             adapter->min_tx_queues + adapter->min_rx_queues) {
1532                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
1533                 goto tx_failed;
1534         }
1535
1536         /* Distribute the failed allocated queues*/
1537         for (i = 0; i < total_queues - registered_queues + more ; i++) {
1538                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1539                 switch (i % 3) {
1540                 case 0:
1541                         if (adapter->req_rx_queues > adapter->min_rx_queues)
1542                                 adapter->req_rx_queues--;
1543                         else
1544                                 more++;
1545                         break;
1546                 case 1:
1547                         if (adapter->req_tx_queues > adapter->min_tx_queues)
1548                                 adapter->req_tx_queues--;
1549                         else
1550                                 more++;
1551                         break;
1552                 }
1553         }
1554
1555         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1556                                    sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1557         if (!adapter->tx_scrq)
1558                 goto tx_failed;
1559
1560         for (i = 0; i < adapter->req_tx_queues; i++) {
1561                 adapter->tx_scrq[i] = allqueues[i];
1562                 adapter->tx_scrq[i]->pool_index = i;
1563         }
1564
1565         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1566                                    sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1567         if (!adapter->rx_scrq)
1568                 goto rx_failed;
1569
1570         for (i = 0; i < adapter->req_rx_queues; i++) {
1571                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1572                 adapter->rx_scrq[i]->scrq_num = i;
1573         }
1574
1575         memset(&crq, 0, sizeof(crq));
1576         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1577         crq.request_capability.cmd = REQUEST_CAPABILITY;
1578
1579         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
1580         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
1581         ibmvnic_send_crq(adapter, &crq);
1582
1583         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
1584         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
1585         ibmvnic_send_crq(adapter, &crq);
1586
1587         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
1588         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
1589         ibmvnic_send_crq(adapter, &crq);
1590
1591         crq.request_capability.capability =
1592             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1593         crq.request_capability.number =
1594             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
1595         ibmvnic_send_crq(adapter, &crq);
1596
1597         crq.request_capability.capability =
1598             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1599         crq.request_capability.number =
1600             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
1601         ibmvnic_send_crq(adapter, &crq);
1602
1603         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
1604         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
1605         ibmvnic_send_crq(adapter, &crq);
1606
1607         if (adapter->netdev->flags & IFF_PROMISC) {
1608                 if (adapter->promisc_supported) {
1609                         crq.request_capability.capability =
1610                             cpu_to_be16(PROMISC_REQUESTED);
1611                         crq.request_capability.number = cpu_to_be64(1);
1612                         ibmvnic_send_crq(adapter, &crq);
1613                 }
1614         } else {
1615                 crq.request_capability.capability =
1616                     cpu_to_be16(PROMISC_REQUESTED);
1617                 crq.request_capability.number = cpu_to_be64(0);
1618                 ibmvnic_send_crq(adapter, &crq);
1619         }
1620
1621         kfree(allqueues);
1622
1623         return;
1624
1625 rx_failed:
1626         kfree(adapter->tx_scrq);
1627         adapter->tx_scrq = NULL;
1628 tx_failed:
1629         for (i = 0; i < registered_queues; i++)
1630                 release_sub_crq_queue(adapter, allqueues[i]);
1631         kfree(allqueues);
1632 allqueues_failed:
1633         ibmvnic_remove(adapter->vdev);
1634 }
1635
1636 static int pending_scrq(struct ibmvnic_adapter *adapter,
1637                         struct ibmvnic_sub_crq_queue *scrq)
1638 {
1639         union sub_crq *entry = &scrq->msgs[scrq->cur];
1640
1641         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1642                 return 1;
1643         else
1644                 return 0;
1645 }
1646
1647 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1648                                         struct ibmvnic_sub_crq_queue *scrq)
1649 {
1650         union sub_crq *entry;
1651         unsigned long flags;
1652
1653         spin_lock_irqsave(&scrq->lock, flags);
1654         entry = &scrq->msgs[scrq->cur];
1655         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1656                 if (++scrq->cur == scrq->size)
1657                         scrq->cur = 0;
1658         } else {
1659                 entry = NULL;
1660         }
1661         spin_unlock_irqrestore(&scrq->lock, flags);
1662
1663         return entry;
1664 }
1665
1666 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1667 {
1668         struct ibmvnic_crq_queue *queue = &adapter->crq;
1669         union ibmvnic_crq *crq;
1670
1671         crq = &queue->msgs[queue->cur];
1672         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1673                 if (++queue->cur == queue->size)
1674                         queue->cur = 0;
1675         } else {
1676                 crq = NULL;
1677         }
1678
1679         return crq;
1680 }
1681
1682 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1683                        union sub_crq *sub_crq)
1684 {
1685         unsigned int ua = adapter->vdev->unit_address;
1686         struct device *dev = &adapter->vdev->dev;
1687         u64 *u64_crq = (u64 *)sub_crq;
1688         int rc;
1689
1690         netdev_dbg(adapter->netdev,
1691                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1692                    (unsigned long int)cpu_to_be64(remote_handle),
1693                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1694                    (unsigned long int)cpu_to_be64(u64_crq[1]),
1695                    (unsigned long int)cpu_to_be64(u64_crq[2]),
1696                    (unsigned long int)cpu_to_be64(u64_crq[3]));
1697
1698         /* Make sure the hypervisor sees the complete request */
1699         mb();
1700
1701         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1702                                 cpu_to_be64(remote_handle),
1703                                 cpu_to_be64(u64_crq[0]),
1704                                 cpu_to_be64(u64_crq[1]),
1705                                 cpu_to_be64(u64_crq[2]),
1706                                 cpu_to_be64(u64_crq[3]));
1707
1708         if (rc) {
1709                 if (rc == H_CLOSED)
1710                         dev_warn(dev, "CRQ Queue closed\n");
1711                 dev_err(dev, "Send error (rc=%d)\n", rc);
1712         }
1713
1714         return rc;
1715 }
1716
1717 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
1718                                 u64 remote_handle, u64 ioba, u64 num_entries)
1719 {
1720         unsigned int ua = adapter->vdev->unit_address;
1721         struct device *dev = &adapter->vdev->dev;
1722         int rc;
1723
1724         /* Make sure the hypervisor sees the complete request */
1725         mb();
1726         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
1727                                 cpu_to_be64(remote_handle),
1728                                 ioba, num_entries);
1729
1730         if (rc) {
1731                 if (rc == H_CLOSED)
1732                         dev_warn(dev, "CRQ Queue closed\n");
1733                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
1734         }
1735
1736         return rc;
1737 }
1738
1739 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1740                             union ibmvnic_crq *crq)
1741 {
1742         unsigned int ua = adapter->vdev->unit_address;
1743         struct device *dev = &adapter->vdev->dev;
1744         u64 *u64_crq = (u64 *)crq;
1745         int rc;
1746
1747         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1748                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1749                    (unsigned long int)cpu_to_be64(u64_crq[1]));
1750
1751         /* Make sure the hypervisor sees the complete request */
1752         mb();
1753
1754         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1755                                 cpu_to_be64(u64_crq[0]),
1756                                 cpu_to_be64(u64_crq[1]));
1757
1758         if (rc) {
1759                 if (rc == H_CLOSED)
1760                         dev_warn(dev, "CRQ Queue closed\n");
1761                 dev_warn(dev, "Send error (rc=%d)\n", rc);
1762         }
1763
1764         return rc;
1765 }
1766
1767 static int ibmvnic_send_crq_init(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;
1774         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1775
1776         return ibmvnic_send_crq(adapter, &crq);
1777 }
1778
1779 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1780 {
1781         union ibmvnic_crq crq;
1782
1783         memset(&crq, 0, sizeof(crq));
1784         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1785         crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1786         netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1787
1788         return ibmvnic_send_crq(adapter, &crq);
1789 }
1790
1791 static int send_version_xchg(struct ibmvnic_adapter *adapter)
1792 {
1793         union ibmvnic_crq crq;
1794
1795         memset(&crq, 0, sizeof(crq));
1796         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1797         crq.version_exchange.cmd = VERSION_EXCHANGE;
1798         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1799
1800         return ibmvnic_send_crq(adapter, &crq);
1801 }
1802
1803 static void send_login(struct ibmvnic_adapter *adapter)
1804 {
1805         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1806         struct ibmvnic_login_buffer *login_buffer;
1807         struct ibmvnic_inflight_cmd *inflight_cmd;
1808         struct device *dev = &adapter->vdev->dev;
1809         dma_addr_t rsp_buffer_token;
1810         dma_addr_t buffer_token;
1811         size_t rsp_buffer_size;
1812         union ibmvnic_crq crq;
1813         unsigned long flags;
1814         size_t buffer_size;
1815         __be64 *tx_list_p;
1816         __be64 *rx_list_p;
1817         int i;
1818
1819         buffer_size =
1820             sizeof(struct ibmvnic_login_buffer) +
1821             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1822
1823         login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1824         if (!login_buffer)
1825                 goto buf_alloc_failed;
1826
1827         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1828                                       DMA_TO_DEVICE);
1829         if (dma_mapping_error(dev, buffer_token)) {
1830                 dev_err(dev, "Couldn't map login buffer\n");
1831                 goto buf_map_failed;
1832         }
1833
1834         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
1835                           sizeof(u64) * adapter->req_tx_queues +
1836                           sizeof(u64) * adapter->req_rx_queues +
1837                           sizeof(u64) * adapter->req_rx_queues +
1838                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
1839
1840         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1841         if (!login_rsp_buffer)
1842                 goto buf_rsp_alloc_failed;
1843
1844         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1845                                           rsp_buffer_size, DMA_FROM_DEVICE);
1846         if (dma_mapping_error(dev, rsp_buffer_token)) {
1847                 dev_err(dev, "Couldn't map login rsp buffer\n");
1848                 goto buf_rsp_map_failed;
1849         }
1850         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
1851         if (!inflight_cmd) {
1852                 dev_err(dev, "Couldn't allocate inflight_cmd\n");
1853                 goto inflight_alloc_failed;
1854         }
1855         adapter->login_buf = login_buffer;
1856         adapter->login_buf_token = buffer_token;
1857         adapter->login_buf_sz = buffer_size;
1858         adapter->login_rsp_buf = login_rsp_buffer;
1859         adapter->login_rsp_buf_token = rsp_buffer_token;
1860         adapter->login_rsp_buf_sz = rsp_buffer_size;
1861
1862         login_buffer->len = cpu_to_be32(buffer_size);
1863         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
1864         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
1865         login_buffer->off_txcomp_subcrqs =
1866             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
1867         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
1868         login_buffer->off_rxcomp_subcrqs =
1869             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
1870                         sizeof(u64) * adapter->req_tx_queues);
1871         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
1872         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
1873
1874         tx_list_p = (__be64 *)((char *)login_buffer +
1875                                       sizeof(struct ibmvnic_login_buffer));
1876         rx_list_p = (__be64 *)((char *)login_buffer +
1877                                       sizeof(struct ibmvnic_login_buffer) +
1878                                       sizeof(u64) * adapter->req_tx_queues);
1879
1880         for (i = 0; i < adapter->req_tx_queues; i++) {
1881                 if (adapter->tx_scrq[i]) {
1882                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
1883                                                    crq_num);
1884                 }
1885         }
1886
1887         for (i = 0; i < adapter->req_rx_queues; i++) {
1888                 if (adapter->rx_scrq[i]) {
1889                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
1890                                                    crq_num);
1891                 }
1892         }
1893
1894         netdev_dbg(adapter->netdev, "Login Buffer:\n");
1895         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
1896                 netdev_dbg(adapter->netdev, "%016lx\n",
1897                            ((unsigned long int *)(adapter->login_buf))[i]);
1898         }
1899
1900         memset(&crq, 0, sizeof(crq));
1901         crq.login.first = IBMVNIC_CRQ_CMD;
1902         crq.login.cmd = LOGIN;
1903         crq.login.ioba = cpu_to_be32(buffer_token);
1904         crq.login.len = cpu_to_be32(buffer_size);
1905
1906         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
1907
1908         spin_lock_irqsave(&adapter->inflight_lock, flags);
1909         list_add_tail(&inflight_cmd->list, &adapter->inflight);
1910         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
1911
1912         ibmvnic_send_crq(adapter, &crq);
1913
1914         return;
1915
1916 inflight_alloc_failed:
1917         dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
1918                          DMA_FROM_DEVICE);
1919 buf_rsp_map_failed:
1920         kfree(login_rsp_buffer);
1921 buf_rsp_alloc_failed:
1922         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
1923 buf_map_failed:
1924         kfree(login_buffer);
1925 buf_alloc_failed:
1926         return;
1927 }
1928
1929 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
1930                              u32 len, u8 map_id)
1931 {
1932         union ibmvnic_crq crq;
1933
1934         memset(&crq, 0, sizeof(crq));
1935         crq.request_map.first = IBMVNIC_CRQ_CMD;
1936         crq.request_map.cmd = REQUEST_MAP;
1937         crq.request_map.map_id = map_id;
1938         crq.request_map.ioba = cpu_to_be32(addr);
1939         crq.request_map.len = cpu_to_be32(len);
1940         ibmvnic_send_crq(adapter, &crq);
1941 }
1942
1943 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
1944 {
1945         union ibmvnic_crq crq;
1946
1947         memset(&crq, 0, sizeof(crq));
1948         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
1949         crq.request_unmap.cmd = REQUEST_UNMAP;
1950         crq.request_unmap.map_id = map_id;
1951         ibmvnic_send_crq(adapter, &crq);
1952 }
1953
1954 static void send_map_query(struct ibmvnic_adapter *adapter)
1955 {
1956         union ibmvnic_crq crq;
1957
1958         memset(&crq, 0, sizeof(crq));
1959         crq.query_map.first = IBMVNIC_CRQ_CMD;
1960         crq.query_map.cmd = QUERY_MAP;
1961         ibmvnic_send_crq(adapter, &crq);
1962 }
1963
1964 /* Send a series of CRQs requesting various capabilities of the VNIC server */
1965 static void send_cap_queries(struct ibmvnic_adapter *adapter)
1966 {
1967         union ibmvnic_crq crq;
1968
1969         atomic_set(&adapter->running_cap_queries, 0);
1970         memset(&crq, 0, sizeof(crq));
1971         crq.query_capability.first = IBMVNIC_CRQ_CMD;
1972         crq.query_capability.cmd = QUERY_CAPABILITY;
1973
1974         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
1975         atomic_inc(&adapter->running_cap_queries);
1976         ibmvnic_send_crq(adapter, &crq);
1977
1978         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
1979         atomic_inc(&adapter->running_cap_queries);
1980         ibmvnic_send_crq(adapter, &crq);
1981
1982         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
1983         atomic_inc(&adapter->running_cap_queries);
1984         ibmvnic_send_crq(adapter, &crq);
1985
1986         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
1987         atomic_inc(&adapter->running_cap_queries);
1988         ibmvnic_send_crq(adapter, &crq);
1989
1990         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
1991         atomic_inc(&adapter->running_cap_queries);
1992         ibmvnic_send_crq(adapter, &crq);
1993
1994         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
1995         atomic_inc(&adapter->running_cap_queries);
1996         ibmvnic_send_crq(adapter, &crq);
1997
1998         crq.query_capability.capability =
1999             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
2000         atomic_inc(&adapter->running_cap_queries);
2001         ibmvnic_send_crq(adapter, &crq);
2002
2003         crq.query_capability.capability =
2004             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2005         atomic_inc(&adapter->running_cap_queries);
2006         ibmvnic_send_crq(adapter, &crq);
2007
2008         crq.query_capability.capability =
2009             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2010         atomic_inc(&adapter->running_cap_queries);
2011         ibmvnic_send_crq(adapter, &crq);
2012
2013         crq.query_capability.capability =
2014             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2015         atomic_inc(&adapter->running_cap_queries);
2016         ibmvnic_send_crq(adapter, &crq);
2017
2018         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2019         atomic_inc(&adapter->running_cap_queries);
2020         ibmvnic_send_crq(adapter, &crq);
2021
2022         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2023         atomic_inc(&adapter->running_cap_queries);
2024         ibmvnic_send_crq(adapter, &crq);
2025
2026         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2027         atomic_inc(&adapter->running_cap_queries);
2028         ibmvnic_send_crq(adapter, &crq);
2029
2030         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2031         atomic_inc(&adapter->running_cap_queries);
2032         ibmvnic_send_crq(adapter, &crq);
2033
2034         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2035         atomic_inc(&adapter->running_cap_queries);
2036         ibmvnic_send_crq(adapter, &crq);
2037
2038         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2039         atomic_inc(&adapter->running_cap_queries);
2040         ibmvnic_send_crq(adapter, &crq);
2041
2042         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2043         atomic_inc(&adapter->running_cap_queries);
2044         ibmvnic_send_crq(adapter, &crq);
2045
2046         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2047         atomic_inc(&adapter->running_cap_queries);
2048         ibmvnic_send_crq(adapter, &crq);
2049
2050         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2051         atomic_inc(&adapter->running_cap_queries);
2052         ibmvnic_send_crq(adapter, &crq);
2053
2054         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2055         atomic_inc(&adapter->running_cap_queries);
2056         ibmvnic_send_crq(adapter, &crq);
2057
2058         crq.query_capability.capability =
2059                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2060         atomic_inc(&adapter->running_cap_queries);
2061         ibmvnic_send_crq(adapter, &crq);
2062
2063         crq.query_capability.capability =
2064                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2065         atomic_inc(&adapter->running_cap_queries);
2066         ibmvnic_send_crq(adapter, &crq);
2067
2068         crq.query_capability.capability =
2069                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2070         atomic_inc(&adapter->running_cap_queries);
2071         ibmvnic_send_crq(adapter, &crq);
2072
2073         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2074         atomic_inc(&adapter->running_cap_queries);
2075         ibmvnic_send_crq(adapter, &crq);
2076 }
2077
2078 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2079 {
2080         struct device *dev = &adapter->vdev->dev;
2081         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2082         union ibmvnic_crq crq;
2083         int i;
2084
2085         dma_unmap_single(dev, adapter->ip_offload_tok,
2086                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2087
2088         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2089         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2090                 netdev_dbg(adapter->netdev, "%016lx\n",
2091                            ((unsigned long int *)(buf))[i]);
2092
2093         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2094         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2095         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2096                    buf->tcp_ipv4_chksum);
2097         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2098                    buf->tcp_ipv6_chksum);
2099         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2100                    buf->udp_ipv4_chksum);
2101         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2102                    buf->udp_ipv6_chksum);
2103         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2104                    buf->large_tx_ipv4);
2105         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2106                    buf->large_tx_ipv6);
2107         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2108                    buf->large_rx_ipv4);
2109         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2110                    buf->large_rx_ipv6);
2111         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2112                    buf->max_ipv4_header_size);
2113         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2114                    buf->max_ipv6_header_size);
2115         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2116                    buf->max_tcp_header_size);
2117         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2118                    buf->max_udp_header_size);
2119         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2120                    buf->max_large_tx_size);
2121         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2122                    buf->max_large_rx_size);
2123         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2124                    buf->ipv6_extension_header);
2125         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2126                    buf->tcp_pseudosum_req);
2127         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2128                    buf->num_ipv6_ext_headers);
2129         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2130                    buf->off_ipv6_ext_headers);
2131
2132         adapter->ip_offload_ctrl_tok =
2133             dma_map_single(dev, &adapter->ip_offload_ctrl,
2134                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2135
2136         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2137                 dev_err(dev, "Couldn't map ip offload control buffer\n");
2138                 return;
2139         }
2140
2141         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2142         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2143         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2144         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2145         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2146
2147         /* large_tx/rx disabled for now, additional features needed */
2148         adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2149         adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2150         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2151         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2152
2153         adapter->netdev->features = NETIF_F_GSO;
2154
2155         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2156                 adapter->netdev->features |= NETIF_F_IP_CSUM;
2157
2158         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2159                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2160
2161         if ((adapter->netdev->features &
2162             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2163                 adapter->netdev->features |= NETIF_F_RXCSUM;
2164
2165         memset(&crq, 0, sizeof(crq));
2166         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2167         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2168         crq.control_ip_offload.len =
2169             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2170         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2171         ibmvnic_send_crq(adapter, &crq);
2172 }
2173
2174 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2175                                   struct ibmvnic_adapter *adapter)
2176 {
2177         struct device *dev = &adapter->vdev->dev;
2178         struct ibmvnic_error_buff *error_buff, *tmp;
2179         unsigned long flags;
2180         bool found = false;
2181         int i;
2182
2183         if (!crq->request_error_rsp.rc.code) {
2184                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2185                          crq->request_error_rsp.rc.code);
2186                 return;
2187         }
2188
2189         spin_lock_irqsave(&adapter->error_list_lock, flags);
2190         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2191                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2192                         found = true;
2193                         list_del(&error_buff->list);
2194                         break;
2195                 }
2196         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2197
2198         if (!found) {
2199                 dev_err(dev, "Couldn't find error id %x\n",
2200                         crq->request_error_rsp.error_id);
2201                 return;
2202         }
2203
2204         dev_err(dev, "Detailed info for error id %x:",
2205                 crq->request_error_rsp.error_id);
2206
2207         for (i = 0; i < error_buff->len; i++) {
2208                 pr_cont("%02x", (int)error_buff->buff[i]);
2209                 if (i % 8 == 7)
2210                         pr_cont(" ");
2211         }
2212         pr_cont("\n");
2213
2214         dma_unmap_single(dev, error_buff->dma, error_buff->len,
2215                          DMA_FROM_DEVICE);
2216         kfree(error_buff->buff);
2217         kfree(error_buff);
2218 }
2219
2220 static void handle_dump_size_rsp(union ibmvnic_crq *crq,
2221                                  struct ibmvnic_adapter *adapter)
2222 {
2223         int len = be32_to_cpu(crq->request_dump_size_rsp.len);
2224         struct ibmvnic_inflight_cmd *inflight_cmd;
2225         struct device *dev = &adapter->vdev->dev;
2226         union ibmvnic_crq newcrq;
2227         unsigned long flags;
2228
2229         /* allocate and map buffer */
2230         adapter->dump_data = kmalloc(len, GFP_KERNEL);
2231         if (!adapter->dump_data) {
2232                 complete(&adapter->fw_done);
2233                 return;
2234         }
2235
2236         adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len,
2237                                                   DMA_FROM_DEVICE);
2238
2239         if (dma_mapping_error(dev, adapter->dump_data_token)) {
2240                 if (!firmware_has_feature(FW_FEATURE_CMO))
2241                         dev_err(dev, "Couldn't map dump data\n");
2242                 kfree(adapter->dump_data);
2243                 complete(&adapter->fw_done);
2244                 return;
2245         }
2246
2247         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2248         if (!inflight_cmd) {
2249                 dma_unmap_single(dev, adapter->dump_data_token, len,
2250                                  DMA_FROM_DEVICE);
2251                 kfree(adapter->dump_data);
2252                 complete(&adapter->fw_done);
2253                 return;
2254         }
2255
2256         memset(&newcrq, 0, sizeof(newcrq));
2257         newcrq.request_dump.first = IBMVNIC_CRQ_CMD;
2258         newcrq.request_dump.cmd = REQUEST_DUMP;
2259         newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token);
2260         newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size);
2261
2262         memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq));
2263
2264         spin_lock_irqsave(&adapter->inflight_lock, flags);
2265         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2266         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2267
2268         ibmvnic_send_crq(adapter, &newcrq);
2269 }
2270
2271 static void handle_error_indication(union ibmvnic_crq *crq,
2272                                     struct ibmvnic_adapter *adapter)
2273 {
2274         int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2275         struct ibmvnic_inflight_cmd *inflight_cmd;
2276         struct device *dev = &adapter->vdev->dev;
2277         struct ibmvnic_error_buff *error_buff;
2278         union ibmvnic_crq new_crq;
2279         unsigned long flags;
2280
2281         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2282                 crq->error_indication.
2283                     flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2284                 crq->error_indication.error_id,
2285                 crq->error_indication.error_cause);
2286
2287         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2288         if (!error_buff)
2289                 return;
2290
2291         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2292         if (!error_buff->buff) {
2293                 kfree(error_buff);
2294                 return;
2295         }
2296
2297         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2298                                          DMA_FROM_DEVICE);
2299         if (dma_mapping_error(dev, error_buff->dma)) {
2300                 if (!firmware_has_feature(FW_FEATURE_CMO))
2301                         dev_err(dev, "Couldn't map error buffer\n");
2302                 kfree(error_buff->buff);
2303                 kfree(error_buff);
2304                 return;
2305         }
2306
2307         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2308         if (!inflight_cmd) {
2309                 dma_unmap_single(dev, error_buff->dma, detail_len,
2310                                  DMA_FROM_DEVICE);
2311                 kfree(error_buff->buff);
2312                 kfree(error_buff);
2313                 return;
2314         }
2315
2316         error_buff->len = detail_len;
2317         error_buff->error_id = crq->error_indication.error_id;
2318
2319         spin_lock_irqsave(&adapter->error_list_lock, flags);
2320         list_add_tail(&error_buff->list, &adapter->errors);
2321         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2322
2323         memset(&new_crq, 0, sizeof(new_crq));
2324         new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2325         new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2326         new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2327         new_crq.request_error_info.len = cpu_to_be32(detail_len);
2328         new_crq.request_error_info.error_id = crq->error_indication.error_id;
2329
2330         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2331
2332         spin_lock_irqsave(&adapter->inflight_lock, flags);
2333         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2334         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2335
2336         ibmvnic_send_crq(adapter, &new_crq);
2337 }
2338
2339 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2340                                   struct ibmvnic_adapter *adapter)
2341 {
2342         struct net_device *netdev = adapter->netdev;
2343         struct device *dev = &adapter->vdev->dev;
2344         long rc;
2345
2346         rc = crq->change_mac_addr_rsp.rc.code;
2347         if (rc) {
2348                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2349                 return;
2350         }
2351         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2352                ETH_ALEN);
2353 }
2354
2355 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2356                                    struct ibmvnic_adapter *adapter)
2357 {
2358         struct device *dev = &adapter->vdev->dev;
2359         u64 *req_value;
2360         char *name;
2361
2362         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2363         case REQ_TX_QUEUES:
2364                 req_value = &adapter->req_tx_queues;
2365                 name = "tx";
2366                 break;
2367         case REQ_RX_QUEUES:
2368                 req_value = &adapter->req_rx_queues;
2369                 name = "rx";
2370                 break;
2371         case REQ_RX_ADD_QUEUES:
2372                 req_value = &adapter->req_rx_add_queues;
2373                 name = "rx_add";
2374                 break;
2375         case REQ_TX_ENTRIES_PER_SUBCRQ:
2376                 req_value = &adapter->req_tx_entries_per_subcrq;
2377                 name = "tx_entries_per_subcrq";
2378                 break;
2379         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2380                 req_value = &adapter->req_rx_add_entries_per_subcrq;
2381                 name = "rx_add_entries_per_subcrq";
2382                 break;
2383         case REQ_MTU:
2384                 req_value = &adapter->req_mtu;
2385                 name = "mtu";
2386                 break;
2387         case PROMISC_REQUESTED:
2388                 req_value = &adapter->promisc;
2389                 name = "promisc";
2390                 break;
2391         default:
2392                 dev_err(dev, "Got invalid cap request rsp %d\n",
2393                         crq->request_capability.capability);
2394                 return;
2395         }
2396
2397         switch (crq->request_capability_rsp.rc.code) {
2398         case SUCCESS:
2399                 break;
2400         case PARTIALSUCCESS:
2401                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2402                          *req_value,
2403                          (long int)be32_to_cpu(crq->request_capability_rsp.
2404                                                number), name);
2405                 release_sub_crqs_no_irqs(adapter);
2406                 *req_value = be32_to_cpu(crq->request_capability_rsp.number);
2407                 init_sub_crqs(adapter, 1);
2408                 return;
2409         default:
2410                 dev_err(dev, "Error %d in request cap rsp\n",
2411                         crq->request_capability_rsp.rc.code);
2412                 return;
2413         }
2414
2415         /* Done receiving requested capabilities, query IP offload support */
2416         if (++adapter->requested_caps == 7) {
2417                 union ibmvnic_crq newcrq;
2418                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2419                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2420                     &adapter->ip_offload_buf;
2421
2422                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2423                                                          buf_sz,
2424                                                          DMA_FROM_DEVICE);
2425
2426                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2427                         if (!firmware_has_feature(FW_FEATURE_CMO))
2428                                 dev_err(dev, "Couldn't map offload buffer\n");
2429                         return;
2430                 }
2431
2432                 memset(&newcrq, 0, sizeof(newcrq));
2433                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2434                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2435                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2436                 newcrq.query_ip_offload.ioba =
2437                     cpu_to_be32(adapter->ip_offload_tok);
2438
2439                 ibmvnic_send_crq(adapter, &newcrq);
2440         }
2441 }
2442
2443 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2444                             struct ibmvnic_adapter *adapter)
2445 {
2446         struct device *dev = &adapter->vdev->dev;
2447         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2448         struct ibmvnic_login_buffer *login = adapter->login_buf;
2449         union ibmvnic_crq crq;
2450         int i;
2451
2452         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2453                          DMA_BIDIRECTIONAL);
2454         dma_unmap_single(dev, adapter->login_rsp_buf_token,
2455                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2456
2457         /* If the number of queues requested can't be allocated by the
2458          * server, the login response will return with code 1. We will need
2459          * to resend the login buffer with fewer queues requested.
2460          */
2461         if (login_rsp_crq->generic.rc.code) {
2462                 adapter->renegotiate = true;
2463                 complete(&adapter->init_done);
2464                 return 0;
2465         }
2466
2467         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2468         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2469                 netdev_dbg(adapter->netdev, "%016lx\n",
2470                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2471         }
2472
2473         /* Sanity checks */
2474         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2475             (be32_to_cpu(login->num_rxcomp_subcrqs) *
2476              adapter->req_rx_add_queues !=
2477              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2478                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2479                 ibmvnic_remove(adapter->vdev);
2480                 return -EIO;
2481         }
2482         complete(&adapter->init_done);
2483
2484         memset(&crq, 0, sizeof(crq));
2485         crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD;
2486         crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM;
2487         ibmvnic_send_crq(adapter, &crq);
2488
2489         return 0;
2490 }
2491
2492 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2493                                    struct ibmvnic_adapter *adapter)
2494 {
2495         struct device *dev = &adapter->vdev->dev;
2496         u8 map_id = crq->request_map_rsp.map_id;
2497         int tx_subcrqs;
2498         int rx_subcrqs;
2499         long rc;
2500         int i;
2501
2502         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2503         rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2504
2505         rc = crq->request_map_rsp.rc.code;
2506         if (rc) {
2507                 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2508                 adapter->map_id--;
2509                 /* need to find and zero tx/rx_pool map_id */
2510                 for (i = 0; i < tx_subcrqs; i++) {
2511                         if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2512                                 adapter->tx_pool[i].long_term_buff.map_id = 0;
2513                 }
2514                 for (i = 0; i < rx_subcrqs; i++) {
2515                         if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2516                                 adapter->rx_pool[i].long_term_buff.map_id = 0;
2517                 }
2518         }
2519         complete(&adapter->fw_done);
2520 }
2521
2522 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2523                                      struct ibmvnic_adapter *adapter)
2524 {
2525         struct device *dev = &adapter->vdev->dev;
2526         long rc;
2527
2528         rc = crq->request_unmap_rsp.rc.code;
2529         if (rc)
2530                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2531 }
2532
2533 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2534                                  struct ibmvnic_adapter *adapter)
2535 {
2536         struct net_device *netdev = adapter->netdev;
2537         struct device *dev = &adapter->vdev->dev;
2538         long rc;
2539
2540         rc = crq->query_map_rsp.rc.code;
2541         if (rc) {
2542                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2543                 return;
2544         }
2545         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2546                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2547                    crq->query_map_rsp.free_pages);
2548 }
2549
2550 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2551                                  struct ibmvnic_adapter *adapter)
2552 {
2553         struct net_device *netdev = adapter->netdev;
2554         struct device *dev = &adapter->vdev->dev;
2555         long rc;
2556
2557         atomic_dec(&adapter->running_cap_queries);
2558         netdev_dbg(netdev, "Outstanding queries: %d\n",
2559                    atomic_read(&adapter->running_cap_queries));
2560         rc = crq->query_capability.rc.code;
2561         if (rc) {
2562                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2563                 goto out;
2564         }
2565
2566         switch (be16_to_cpu(crq->query_capability.capability)) {
2567         case MIN_TX_QUEUES:
2568                 adapter->min_tx_queues =
2569                     be64_to_cpu(crq->query_capability.number);
2570                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2571                            adapter->min_tx_queues);
2572                 break;
2573         case MIN_RX_QUEUES:
2574                 adapter->min_rx_queues =
2575                     be64_to_cpu(crq->query_capability.number);
2576                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2577                            adapter->min_rx_queues);
2578                 break;
2579         case MIN_RX_ADD_QUEUES:
2580                 adapter->min_rx_add_queues =
2581                     be64_to_cpu(crq->query_capability.number);
2582                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2583                            adapter->min_rx_add_queues);
2584                 break;
2585         case MAX_TX_QUEUES:
2586                 adapter->max_tx_queues =
2587                     be64_to_cpu(crq->query_capability.number);
2588                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2589                            adapter->max_tx_queues);
2590                 break;
2591         case MAX_RX_QUEUES:
2592                 adapter->max_rx_queues =
2593                     be64_to_cpu(crq->query_capability.number);
2594                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2595                            adapter->max_rx_queues);
2596                 break;
2597         case MAX_RX_ADD_QUEUES:
2598                 adapter->max_rx_add_queues =
2599                     be64_to_cpu(crq->query_capability.number);
2600                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2601                            adapter->max_rx_add_queues);
2602                 break;
2603         case MIN_TX_ENTRIES_PER_SUBCRQ:
2604                 adapter->min_tx_entries_per_subcrq =
2605                     be64_to_cpu(crq->query_capability.number);
2606                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2607                            adapter->min_tx_entries_per_subcrq);
2608                 break;
2609         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2610                 adapter->min_rx_add_entries_per_subcrq =
2611                     be64_to_cpu(crq->query_capability.number);
2612                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2613                            adapter->min_rx_add_entries_per_subcrq);
2614                 break;
2615         case MAX_TX_ENTRIES_PER_SUBCRQ:
2616                 adapter->max_tx_entries_per_subcrq =
2617                     be64_to_cpu(crq->query_capability.number);
2618                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2619                            adapter->max_tx_entries_per_subcrq);
2620                 break;
2621         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2622                 adapter->max_rx_add_entries_per_subcrq =
2623                     be64_to_cpu(crq->query_capability.number);
2624                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2625                            adapter->max_rx_add_entries_per_subcrq);
2626                 break;
2627         case TCP_IP_OFFLOAD:
2628                 adapter->tcp_ip_offload =
2629                     be64_to_cpu(crq->query_capability.number);
2630                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2631                            adapter->tcp_ip_offload);
2632                 break;
2633         case PROMISC_SUPPORTED:
2634                 adapter->promisc_supported =
2635                     be64_to_cpu(crq->query_capability.number);
2636                 netdev_dbg(netdev, "promisc_supported = %lld\n",
2637                            adapter->promisc_supported);
2638                 break;
2639         case MIN_MTU:
2640                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
2641                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2642                 break;
2643         case MAX_MTU:
2644                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
2645                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2646                 break;
2647         case MAX_MULTICAST_FILTERS:
2648                 adapter->max_multicast_filters =
2649                     be64_to_cpu(crq->query_capability.number);
2650                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2651                            adapter->max_multicast_filters);
2652                 break;
2653         case VLAN_HEADER_INSERTION:
2654                 adapter->vlan_header_insertion =
2655                     be64_to_cpu(crq->query_capability.number);
2656                 if (adapter->vlan_header_insertion)
2657                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2658                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2659                            adapter->vlan_header_insertion);
2660                 break;
2661         case MAX_TX_SG_ENTRIES:
2662                 adapter->max_tx_sg_entries =
2663                     be64_to_cpu(crq->query_capability.number);
2664                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2665                            adapter->max_tx_sg_entries);
2666                 break;
2667         case RX_SG_SUPPORTED:
2668                 adapter->rx_sg_supported =
2669                     be64_to_cpu(crq->query_capability.number);
2670                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2671                            adapter->rx_sg_supported);
2672                 break;
2673         case OPT_TX_COMP_SUB_QUEUES:
2674                 adapter->opt_tx_comp_sub_queues =
2675                     be64_to_cpu(crq->query_capability.number);
2676                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2677                            adapter->opt_tx_comp_sub_queues);
2678                 break;
2679         case OPT_RX_COMP_QUEUES:
2680                 adapter->opt_rx_comp_queues =
2681                     be64_to_cpu(crq->query_capability.number);
2682                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2683                            adapter->opt_rx_comp_queues);
2684                 break;
2685         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2686                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
2687                     be64_to_cpu(crq->query_capability.number);
2688                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2689                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
2690                 break;
2691         case OPT_TX_ENTRIES_PER_SUBCRQ:
2692                 adapter->opt_tx_entries_per_subcrq =
2693                     be64_to_cpu(crq->query_capability.number);
2694                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2695                            adapter->opt_tx_entries_per_subcrq);
2696                 break;
2697         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2698                 adapter->opt_rxba_entries_per_subcrq =
2699                     be64_to_cpu(crq->query_capability.number);
2700                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2701                            adapter->opt_rxba_entries_per_subcrq);
2702                 break;
2703         case TX_RX_DESC_REQ:
2704                 adapter->tx_rx_desc_req = crq->query_capability.number;
2705                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2706                            adapter->tx_rx_desc_req);
2707                 break;
2708
2709         default:
2710                 netdev_err(netdev, "Got invalid cap rsp %d\n",
2711                            crq->query_capability.capability);
2712         }
2713
2714 out:
2715         if (atomic_read(&adapter->running_cap_queries) == 0)
2716                 init_sub_crqs(adapter, 0);
2717                 /* We're done querying the capabilities, initialize sub-crqs */
2718 }
2719
2720 static void handle_control_ras_rsp(union ibmvnic_crq *crq,
2721                                    struct ibmvnic_adapter *adapter)
2722 {
2723         u8 correlator = crq->control_ras_rsp.correlator;
2724         struct device *dev = &adapter->vdev->dev;
2725         bool found = false;
2726         int i;
2727
2728         if (crq->control_ras_rsp.rc.code) {
2729                 dev_warn(dev, "Control ras failed rc=%d\n",
2730                          crq->control_ras_rsp.rc.code);
2731                 return;
2732         }
2733
2734         for (i = 0; i < adapter->ras_comp_num; i++) {
2735                 if (adapter->ras_comps[i].correlator == correlator) {
2736                         found = true;
2737                         break;
2738                 }
2739         }
2740
2741         if (!found) {
2742                 dev_warn(dev, "Correlator not found on control_ras_rsp\n");
2743                 return;
2744         }
2745
2746         switch (crq->control_ras_rsp.op) {
2747         case IBMVNIC_TRACE_LEVEL:
2748                 adapter->ras_comps[i].trace_level = crq->control_ras.level;
2749                 break;
2750         case IBMVNIC_ERROR_LEVEL:
2751                 adapter->ras_comps[i].error_check_level =
2752                     crq->control_ras.level;
2753                 break;
2754         case IBMVNIC_TRACE_PAUSE:
2755                 adapter->ras_comp_int[i].paused = 1;
2756                 break;
2757         case IBMVNIC_TRACE_RESUME:
2758                 adapter->ras_comp_int[i].paused = 0;
2759                 break;
2760         case IBMVNIC_TRACE_ON:
2761                 adapter->ras_comps[i].trace_on = 1;
2762                 break;
2763         case IBMVNIC_TRACE_OFF:
2764                 adapter->ras_comps[i].trace_on = 0;
2765                 break;
2766         case IBMVNIC_CHG_TRACE_BUFF_SZ:
2767                 /* trace_buff_sz is 3 bytes, stuff it into an int */
2768                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0;
2769                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] =
2770                     crq->control_ras_rsp.trace_buff_sz[0];
2771                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] =
2772                     crq->control_ras_rsp.trace_buff_sz[1];
2773                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] =
2774                     crq->control_ras_rsp.trace_buff_sz[2];
2775                 break;
2776         default:
2777                 dev_err(dev, "invalid op %d on control_ras_rsp",
2778                         crq->control_ras_rsp.op);
2779         }
2780 }
2781
2782 static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len,
2783                           loff_t *ppos)
2784 {
2785         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2786         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2787         struct device *dev = &adapter->vdev->dev;
2788         struct ibmvnic_fw_trace_entry *trace;
2789         int num = ras_comp_int->num;
2790         union ibmvnic_crq crq;
2791         dma_addr_t trace_tok;
2792
2793         if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2794                 return 0;
2795
2796         trace =
2797             dma_alloc_coherent(dev,
2798                                be32_to_cpu(adapter->ras_comps[num].
2799                                            trace_buff_size), &trace_tok,
2800                                GFP_KERNEL);
2801         if (!trace) {
2802                 dev_err(dev, "Couldn't alloc trace buffer\n");
2803                 return 0;
2804         }
2805
2806         memset(&crq, 0, sizeof(crq));
2807         crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD;
2808         crq.collect_fw_trace.cmd = COLLECT_FW_TRACE;
2809         crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator;
2810         crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok);
2811         crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size;
2812         ibmvnic_send_crq(adapter, &crq);
2813
2814         init_completion(&adapter->fw_done);
2815         wait_for_completion(&adapter->fw_done);
2816
2817         if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2818                 len =
2819                     be32_to_cpu(adapter->ras_comps[num].trace_buff_size) -
2820                     *ppos;
2821
2822         copy_to_user(user_buf, &((u8 *)trace)[*ppos], len);
2823
2824         dma_free_coherent(dev,
2825                           be32_to_cpu(adapter->ras_comps[num].trace_buff_size),
2826                           trace, trace_tok);
2827         *ppos += len;
2828         return len;
2829 }
2830
2831 static const struct file_operations trace_ops = {
2832         .owner          = THIS_MODULE,
2833         .open           = simple_open,
2834         .read           = trace_read,
2835 };
2836
2837 static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len,
2838                            loff_t *ppos)
2839 {
2840         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2841         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2842         int num = ras_comp_int->num;
2843         char buff[5]; /*  1 or 0 plus \n and \0 */
2844         int size;
2845
2846         size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused);
2847
2848         if (*ppos >= size)
2849                 return 0;
2850
2851         copy_to_user(user_buf, buff, size);
2852         *ppos += size;
2853         return size;
2854 }
2855
2856 static ssize_t paused_write(struct file *file, const char __user *user_buf,
2857                             size_t len, loff_t *ppos)
2858 {
2859         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2860         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2861         int num = ras_comp_int->num;
2862         union ibmvnic_crq crq;
2863         unsigned long val;
2864         char buff[9]; /* decimal max int plus \n and \0 */
2865
2866         copy_from_user(buff, user_buf, sizeof(buff));
2867         val = kstrtoul(buff, 10, NULL);
2868
2869         adapter->ras_comp_int[num].paused = val ? 1 : 0;
2870
2871         memset(&crq, 0, sizeof(crq));
2872         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2873         crq.control_ras.cmd = CONTROL_RAS;
2874         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2875         crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME;
2876         ibmvnic_send_crq(adapter, &crq);
2877
2878         return len;
2879 }
2880
2881 static const struct file_operations paused_ops = {
2882         .owner          = THIS_MODULE,
2883         .open           = simple_open,
2884         .read           = paused_read,
2885         .write          = paused_write,
2886 };
2887
2888 static ssize_t tracing_read(struct file *file, char __user *user_buf,
2889                             size_t len, loff_t *ppos)
2890 {
2891         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2892         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2893         int num = ras_comp_int->num;
2894         char buff[5]; /*  1 or 0 plus \n and \0 */
2895         int size;
2896
2897         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on);
2898
2899         if (*ppos >= size)
2900                 return 0;
2901
2902         copy_to_user(user_buf, buff, size);
2903         *ppos += size;
2904         return size;
2905 }
2906
2907 static ssize_t tracing_write(struct file *file, const char __user *user_buf,
2908                              size_t len, loff_t *ppos)
2909 {
2910         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2911         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2912         int num = ras_comp_int->num;
2913         union ibmvnic_crq crq;
2914         unsigned long val;
2915         char buff[9]; /* decimal max int plus \n and \0 */
2916
2917         copy_from_user(buff, user_buf, sizeof(buff));
2918         val = kstrtoul(buff, 10, NULL);
2919
2920         memset(&crq, 0, sizeof(crq));
2921         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2922         crq.control_ras.cmd = CONTROL_RAS;
2923         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2924         crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF;
2925
2926         return len;
2927 }
2928
2929 static const struct file_operations tracing_ops = {
2930         .owner          = THIS_MODULE,
2931         .open           = simple_open,
2932         .read           = tracing_read,
2933         .write          = tracing_write,
2934 };
2935
2936 static ssize_t error_level_read(struct file *file, char __user *user_buf,
2937                                 size_t len, loff_t *ppos)
2938 {
2939         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2940         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2941         int num = ras_comp_int->num;
2942         char buff[5]; /* decimal max char plus \n and \0 */
2943         int size;
2944
2945         size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level);
2946
2947         if (*ppos >= size)
2948                 return 0;
2949
2950         copy_to_user(user_buf, buff, size);
2951         *ppos += size;
2952         return size;
2953 }
2954
2955 static ssize_t error_level_write(struct file *file, const char __user *user_buf,
2956                                  size_t len, loff_t *ppos)
2957 {
2958         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2959         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2960         int num = ras_comp_int->num;
2961         union ibmvnic_crq crq;
2962         unsigned long val;
2963         char buff[9]; /* decimal max int plus \n and \0 */
2964
2965         copy_from_user(buff, user_buf, sizeof(buff));
2966         val = kstrtoul(buff, 10, NULL);
2967
2968         if (val > 9)
2969                 val = 9;
2970
2971         memset(&crq, 0, sizeof(crq));
2972         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2973         crq.control_ras.cmd = CONTROL_RAS;
2974         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2975         crq.control_ras.op = IBMVNIC_ERROR_LEVEL;
2976         crq.control_ras.level = val;
2977         ibmvnic_send_crq(adapter, &crq);
2978
2979         return len;
2980 }
2981
2982 static const struct file_operations error_level_ops = {
2983         .owner          = THIS_MODULE,
2984         .open           = simple_open,
2985         .read           = error_level_read,
2986         .write          = error_level_write,
2987 };
2988
2989 static ssize_t trace_level_read(struct file *file, char __user *user_buf,
2990                                 size_t len, loff_t *ppos)
2991 {
2992         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2993         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2994         int num = ras_comp_int->num;
2995         char buff[5]; /* decimal max char plus \n and \0 */
2996         int size;
2997
2998         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level);
2999         if (*ppos >= size)
3000                 return 0;
3001
3002         copy_to_user(user_buf, buff, size);
3003         *ppos += size;
3004         return size;
3005 }
3006
3007 static ssize_t trace_level_write(struct file *file, const char __user *user_buf,
3008                                  size_t len, loff_t *ppos)
3009 {
3010         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3011         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3012         union ibmvnic_crq crq;
3013         unsigned long val;
3014         char buff[9]; /* decimal max int plus \n and \0 */
3015
3016         copy_from_user(buff, user_buf, sizeof(buff));
3017         val = kstrtoul(buff, 10, NULL);
3018         if (val > 9)
3019                 val = 9;
3020
3021         memset(&crq, 0, sizeof(crq));
3022         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3023         crq.control_ras.cmd = CONTROL_RAS;
3024         crq.control_ras.correlator =
3025             adapter->ras_comps[ras_comp_int->num].correlator;
3026         crq.control_ras.op = IBMVNIC_TRACE_LEVEL;
3027         crq.control_ras.level = val;
3028         ibmvnic_send_crq(adapter, &crq);
3029
3030         return len;
3031 }
3032
3033 static const struct file_operations trace_level_ops = {
3034         .owner          = THIS_MODULE,
3035         .open           = simple_open,
3036         .read           = trace_level_read,
3037         .write          = trace_level_write,
3038 };
3039
3040 static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf,
3041                                     size_t len, loff_t *ppos)
3042 {
3043         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3044         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3045         int num = ras_comp_int->num;
3046         char buff[9]; /* decimal max int plus \n and \0 */
3047         int size;
3048
3049         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size);
3050         if (*ppos >= size)
3051                 return 0;
3052
3053         copy_to_user(user_buf, buff, size);
3054         *ppos += size;
3055         return size;
3056 }
3057
3058 static ssize_t trace_buff_size_write(struct file *file,
3059                                      const char __user *user_buf, size_t len,
3060                                      loff_t *ppos)
3061 {
3062         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3063         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3064         union ibmvnic_crq crq;
3065         unsigned long val;
3066         char buff[9]; /* decimal max int plus \n and \0 */
3067
3068         copy_from_user(buff, user_buf, sizeof(buff));
3069         val = kstrtoul(buff, 10, NULL);
3070
3071         memset(&crq, 0, sizeof(crq));
3072         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3073         crq.control_ras.cmd = CONTROL_RAS;
3074         crq.control_ras.correlator =
3075             adapter->ras_comps[ras_comp_int->num].correlator;
3076         crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ;
3077         /* trace_buff_sz is 3 bytes, stuff an int into it */
3078         crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5];
3079         crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6];
3080         crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7];
3081         ibmvnic_send_crq(adapter, &crq);
3082
3083         return len;
3084 }
3085
3086 static const struct file_operations trace_size_ops = {
3087         .owner          = THIS_MODULE,
3088         .open           = simple_open,
3089         .read           = trace_buff_size_read,
3090         .write          = trace_buff_size_write,
3091 };
3092
3093 static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq,
3094                                          struct ibmvnic_adapter *adapter)
3095 {
3096         struct device *dev = &adapter->vdev->dev;
3097         struct dentry *dir_ent;
3098         struct dentry *ent;
3099         int i;
3100
3101         debugfs_remove_recursive(adapter->ras_comps_ent);
3102
3103         adapter->ras_comps_ent = debugfs_create_dir("ras_comps",
3104                                                     adapter->debugfs_dir);
3105         if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) {
3106                 dev_info(dev, "debugfs create ras_comps dir failed\n");
3107                 return;
3108         }
3109
3110         for (i = 0; i < adapter->ras_comp_num; i++) {
3111                 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name,
3112                                              adapter->ras_comps_ent);
3113                 if (!dir_ent || IS_ERR(dir_ent)) {
3114                         dev_info(dev, "debugfs create %s dir failed\n",
3115                                  adapter->ras_comps[i].name);
3116                         continue;
3117                 }
3118
3119                 adapter->ras_comp_int[i].adapter = adapter;
3120                 adapter->ras_comp_int[i].num = i;
3121                 adapter->ras_comp_int[i].desc_blob.data =
3122                     &adapter->ras_comps[i].description;
3123                 adapter->ras_comp_int[i].desc_blob.size =
3124                     sizeof(adapter->ras_comps[i].description);
3125
3126                 /* Don't need to remember the dentry's because the debugfs dir
3127                  * gets removed recursively
3128                  */
3129                 ent = debugfs_create_blob("description", S_IRUGO, dir_ent,
3130                                           &adapter->ras_comp_int[i].desc_blob);
3131                 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR,
3132                                           dir_ent, &adapter->ras_comp_int[i],
3133                                           &trace_size_ops);
3134                 ent = debugfs_create_file("trace_level",
3135                                           S_IRUGO |
3136                                           (adapter->ras_comps[i].trace_level !=
3137                                            0xFF  ? S_IWUSR : 0),
3138                                            dir_ent, &adapter->ras_comp_int[i],
3139                                            &trace_level_ops);
3140                 ent = debugfs_create_file("error_level",
3141                                           S_IRUGO |
3142                                           (adapter->
3143                                            ras_comps[i].error_check_level !=
3144                                            0xFF ? S_IWUSR : 0),
3145                                           dir_ent, &adapter->ras_comp_int[i],
3146                                           &trace_level_ops);
3147                 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR,
3148                                           dir_ent, &adapter->ras_comp_int[i],
3149                                           &tracing_ops);
3150                 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR,
3151                                           dir_ent, &adapter->ras_comp_int[i],
3152                                           &paused_ops);
3153                 ent = debugfs_create_file("trace", S_IRUGO, dir_ent,
3154                                           &adapter->ras_comp_int[i],
3155                                           &trace_ops);
3156         }
3157 }
3158
3159 static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq,
3160                                             struct ibmvnic_adapter *adapter)
3161 {
3162         int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component);
3163         struct device *dev = &adapter->vdev->dev;
3164         union ibmvnic_crq newcrq;
3165
3166         adapter->ras_comps = dma_alloc_coherent(dev, len,
3167                                                 &adapter->ras_comps_tok,
3168                                                 GFP_KERNEL);
3169         if (!adapter->ras_comps) {
3170                 if (!firmware_has_feature(FW_FEATURE_CMO))
3171                         dev_err(dev, "Couldn't alloc fw comps buffer\n");
3172                 return;
3173         }
3174
3175         adapter->ras_comp_int = kmalloc(adapter->ras_comp_num *
3176                                         sizeof(struct ibmvnic_fw_comp_internal),
3177                                         GFP_KERNEL);
3178         if (!adapter->ras_comp_int)
3179                 dma_free_coherent(dev, len, adapter->ras_comps,
3180                                   adapter->ras_comps_tok);
3181
3182         memset(&newcrq, 0, sizeof(newcrq));
3183         newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD;
3184         newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS;
3185         newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok);
3186         newcrq.request_ras_comps.len = cpu_to_be32(len);
3187         ibmvnic_send_crq(adapter, &newcrq);
3188 }
3189
3190 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
3191 {
3192         struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1;
3193         struct device *dev = &adapter->vdev->dev;
3194         struct ibmvnic_error_buff *error_buff, *tmp2;
3195         unsigned long flags;
3196         unsigned long flags2;
3197
3198         spin_lock_irqsave(&adapter->inflight_lock, flags);
3199         list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) {
3200                 switch (inflight_cmd->crq.generic.cmd) {
3201                 case LOGIN:
3202                         dma_unmap_single(dev, adapter->login_buf_token,
3203                                          adapter->login_buf_sz,
3204                                          DMA_BIDIRECTIONAL);
3205                         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3206                                          adapter->login_rsp_buf_sz,
3207                                          DMA_BIDIRECTIONAL);
3208                         kfree(adapter->login_rsp_buf);
3209                         kfree(adapter->login_buf);
3210                         break;
3211                 case REQUEST_DUMP:
3212                         complete(&adapter->fw_done);
3213                         break;
3214                 case REQUEST_ERROR_INFO:
3215                         spin_lock_irqsave(&adapter->error_list_lock, flags2);
3216                         list_for_each_entry_safe(error_buff, tmp2,
3217                                                  &adapter->errors, list) {
3218                                 dma_unmap_single(dev, error_buff->dma,
3219                                                  error_buff->len,
3220                                                  DMA_FROM_DEVICE);
3221                                 kfree(error_buff->buff);
3222                                 list_del(&error_buff->list);
3223                                 kfree(error_buff);
3224                         }
3225                         spin_unlock_irqrestore(&adapter->error_list_lock,
3226                                                flags2);
3227                         break;
3228                 }
3229                 list_del(&inflight_cmd->list);
3230                 kfree(inflight_cmd);
3231         }
3232         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
3233 }
3234
3235 static void ibmvnic_xport_event(struct work_struct *work)
3236 {
3237         struct ibmvnic_adapter *adapter = container_of(work,
3238                                                        struct ibmvnic_adapter,
3239                                                        ibmvnic_xport);
3240         struct device *dev = &adapter->vdev->dev;
3241         long rc;
3242
3243         ibmvnic_free_inflight(adapter);
3244         release_sub_crqs(adapter);
3245         if (adapter->migrated) {
3246                 rc = ibmvnic_reenable_crq_queue(adapter);
3247                 if (rc)
3248                         dev_err(dev, "Error after enable rc=%ld\n", rc);
3249                 adapter->migrated = false;
3250                 rc = ibmvnic_send_crq_init(adapter);
3251                 if (rc)
3252                         dev_err(dev, "Error sending init rc=%ld\n", rc);
3253         }
3254 }
3255
3256 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3257                                struct ibmvnic_adapter *adapter)
3258 {
3259         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3260         struct net_device *netdev = adapter->netdev;
3261         struct device *dev = &adapter->vdev->dev;
3262         long rc;
3263
3264         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3265                    ((unsigned long int *)crq)[0],
3266                    ((unsigned long int *)crq)[1]);
3267         switch (gen_crq->first) {
3268         case IBMVNIC_CRQ_INIT_RSP:
3269                 switch (gen_crq->cmd) {
3270                 case IBMVNIC_CRQ_INIT:
3271                         dev_info(dev, "Partner initialized\n");
3272                         /* Send back a response */
3273                         rc = ibmvnic_send_crq_init_complete(adapter);
3274                         if (!rc)
3275                                 schedule_work(&adapter->vnic_crq_init);
3276                         else
3277                                 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
3278                         break;
3279                 case IBMVNIC_CRQ_INIT_COMPLETE:
3280                         dev_info(dev, "Partner initialization complete\n");
3281                         send_version_xchg(adapter);
3282                         break;
3283                 default:
3284                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3285                 }
3286                 return;
3287         case IBMVNIC_CRQ_XPORT_EVENT:
3288                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3289                         dev_info(dev, "Re-enabling adapter\n");
3290                         adapter->migrated = true;
3291                         schedule_work(&adapter->ibmvnic_xport);
3292                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3293                         dev_info(dev, "Backing device failover detected\n");
3294                         netif_carrier_off(netdev);
3295                         adapter->failover = true;
3296                 } else {
3297                         /* The adapter lost the connection */
3298                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3299                                 gen_crq->cmd);
3300                         schedule_work(&adapter->ibmvnic_xport);
3301                 }
3302                 return;
3303         case IBMVNIC_CRQ_CMD_RSP:
3304                 break;
3305         default:
3306                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3307                         gen_crq->first);
3308                 return;
3309         }
3310
3311         switch (gen_crq->cmd) {
3312         case VERSION_EXCHANGE_RSP:
3313                 rc = crq->version_exchange_rsp.rc.code;
3314                 if (rc) {
3315                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3316                         break;
3317                 }
3318                 dev_info(dev, "Partner protocol version is %d\n",
3319                          crq->version_exchange_rsp.version);
3320                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3321                     ibmvnic_version)
3322                         ibmvnic_version =
3323                             be16_to_cpu(crq->version_exchange_rsp.version);
3324                 send_cap_queries(adapter);
3325                 break;
3326         case QUERY_CAPABILITY_RSP:
3327                 handle_query_cap_rsp(crq, adapter);
3328                 break;
3329         case QUERY_MAP_RSP:
3330                 handle_query_map_rsp(crq, adapter);
3331                 break;
3332         case REQUEST_MAP_RSP:
3333                 handle_request_map_rsp(crq, adapter);
3334                 break;
3335         case REQUEST_UNMAP_RSP:
3336                 handle_request_unmap_rsp(crq, adapter);
3337                 break;
3338         case REQUEST_CAPABILITY_RSP:
3339                 handle_request_cap_rsp(crq, adapter);
3340                 break;
3341         case LOGIN_RSP:
3342                 netdev_dbg(netdev, "Got Login Response\n");
3343                 handle_login_rsp(crq, adapter);
3344                 break;
3345         case LOGICAL_LINK_STATE_RSP:
3346                 netdev_dbg(netdev, "Got Logical Link State Response\n");
3347                 adapter->logical_link_state =
3348                     crq->logical_link_state_rsp.link_state;
3349                 break;
3350         case LINK_STATE_INDICATION:
3351                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3352                 adapter->phys_link_state =
3353                     crq->link_state_indication.phys_link_state;
3354                 adapter->logical_link_state =
3355                     crq->link_state_indication.logical_link_state;
3356                 break;
3357         case CHANGE_MAC_ADDR_RSP:
3358                 netdev_dbg(netdev, "Got MAC address change Response\n");
3359                 handle_change_mac_rsp(crq, adapter);
3360                 break;
3361         case ERROR_INDICATION:
3362                 netdev_dbg(netdev, "Got Error Indication\n");
3363                 handle_error_indication(crq, adapter);
3364                 break;
3365         case REQUEST_ERROR_RSP:
3366                 netdev_dbg(netdev, "Got Error Detail Response\n");
3367                 handle_error_info_rsp(crq, adapter);
3368                 break;
3369         case REQUEST_STATISTICS_RSP:
3370                 netdev_dbg(netdev, "Got Statistics Response\n");
3371                 complete(&adapter->stats_done);
3372                 break;
3373         case REQUEST_DUMP_SIZE_RSP:
3374                 netdev_dbg(netdev, "Got Request Dump Size Response\n");
3375                 handle_dump_size_rsp(crq, adapter);
3376                 break;
3377         case REQUEST_DUMP_RSP:
3378                 netdev_dbg(netdev, "Got Request Dump Response\n");
3379                 complete(&adapter->fw_done);
3380                 break;
3381         case QUERY_IP_OFFLOAD_RSP:
3382                 netdev_dbg(netdev, "Got Query IP offload Response\n");
3383                 handle_query_ip_offload_rsp(adapter);
3384                 break;
3385         case MULTICAST_CTRL_RSP:
3386                 netdev_dbg(netdev, "Got multicast control Response\n");
3387                 break;
3388         case CONTROL_IP_OFFLOAD_RSP:
3389                 netdev_dbg(netdev, "Got Control IP offload Response\n");
3390                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3391                                  sizeof(adapter->ip_offload_ctrl),
3392                                  DMA_TO_DEVICE);
3393                 /* We're done with the queries, perform the login */
3394                 send_login(adapter);
3395                 break;
3396         case REQUEST_RAS_COMP_NUM_RSP:
3397                 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n");
3398                 if (crq->request_ras_comp_num_rsp.rc.code == 10) {
3399                         netdev_dbg(netdev, "Request RAS Comp Num not supported\n");
3400                         break;
3401                 }
3402                 adapter->ras_comp_num =
3403                     be32_to_cpu(crq->request_ras_comp_num_rsp.num_components);
3404                 handle_request_ras_comp_num_rsp(crq, adapter);
3405                 break;
3406         case REQUEST_RAS_COMPS_RSP:
3407                 netdev_dbg(netdev, "Got Request RAS Comps Response\n");
3408                 handle_request_ras_comps_rsp(crq, adapter);
3409                 break;
3410         case CONTROL_RAS_RSP:
3411                 netdev_dbg(netdev, "Got Control RAS Response\n");
3412                 handle_control_ras_rsp(crq, adapter);
3413                 break;
3414         case COLLECT_FW_TRACE_RSP:
3415                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3416                 complete(&adapter->fw_done);
3417                 break;
3418         default:
3419                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3420                            gen_crq->cmd);
3421         }
3422 }
3423
3424 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3425 {
3426         struct ibmvnic_adapter *adapter = instance;
3427         struct ibmvnic_crq_queue *queue = &adapter->crq;
3428         struct vio_dev *vdev = adapter->vdev;
3429         union ibmvnic_crq *crq;
3430         unsigned long flags;
3431         bool done = false;
3432
3433         spin_lock_irqsave(&queue->lock, flags);
3434         vio_disable_interrupts(vdev);
3435         while (!done) {
3436                 /* Pull all the valid messages off the CRQ */
3437                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3438                         ibmvnic_handle_crq(crq, adapter);
3439                         crq->generic.first = 0;
3440                 }
3441                 vio_enable_interrupts(vdev);
3442                 crq = ibmvnic_next_crq(adapter);
3443                 if (crq) {
3444                         vio_disable_interrupts(vdev);
3445                         ibmvnic_handle_crq(crq, adapter);
3446                         crq->generic.first = 0;
3447                 } else {
3448                         done = true;
3449                 }
3450         }
3451         spin_unlock_irqrestore(&queue->lock, flags);
3452         return IRQ_HANDLED;
3453 }
3454
3455 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3456 {
3457         struct vio_dev *vdev = adapter->vdev;
3458         int rc;
3459
3460         do {
3461                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3462         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3463
3464         if (rc)
3465                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3466
3467         return rc;
3468 }
3469
3470 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3471 {
3472         struct ibmvnic_crq_queue *crq = &adapter->crq;
3473         struct device *dev = &adapter->vdev->dev;
3474         struct vio_dev *vdev = adapter->vdev;
3475         int rc;
3476
3477         /* Close the CRQ */
3478         do {
3479                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3480         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3481
3482         /* Clean out the queue */
3483         memset(crq->msgs, 0, PAGE_SIZE);
3484         crq->cur = 0;
3485
3486         /* And re-open it again */
3487         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3488                                 crq->msg_token, PAGE_SIZE);
3489
3490         if (rc == H_CLOSED)
3491                 /* Adapter is good, but other end is not ready */
3492                 dev_warn(dev, "Partner adapter not ready\n");
3493         else if (rc != 0)
3494                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3495
3496         return rc;
3497 }
3498
3499 static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter)
3500 {
3501         struct ibmvnic_crq_queue *crq = &adapter->crq;
3502         struct vio_dev *vdev = adapter->vdev;
3503         long rc;
3504
3505         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3506         free_irq(vdev->irq, adapter);
3507         do {
3508                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3509         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3510
3511         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3512                          DMA_BIDIRECTIONAL);
3513         free_page((unsigned long)crq->msgs);
3514 }
3515
3516 static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter)
3517 {
3518         struct ibmvnic_crq_queue *crq = &adapter->crq;
3519         struct device *dev = &adapter->vdev->dev;
3520         struct vio_dev *vdev = adapter->vdev;
3521         int rc, retrc = -ENOMEM;
3522
3523         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3524         /* Should we allocate more than one page? */
3525
3526         if (!crq->msgs)
3527                 return -ENOMEM;
3528
3529         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3530         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3531                                         DMA_BIDIRECTIONAL);
3532         if (dma_mapping_error(dev, crq->msg_token))
3533                 goto map_failed;
3534
3535         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3536                                 crq->msg_token, PAGE_SIZE);
3537
3538         if (rc == H_RESOURCE)
3539                 /* maybe kexecing and resource is busy. try a reset */
3540                 rc = ibmvnic_reset_crq(adapter);
3541         retrc = rc;
3542
3543         if (rc == H_CLOSED) {
3544                 dev_warn(dev, "Partner adapter not ready\n");
3545         } else if (rc) {
3546                 dev_warn(dev, "Error %d opening adapter\n", rc);
3547                 goto reg_crq_failed;
3548         }
3549
3550         retrc = 0;
3551
3552         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3553         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3554                          adapter);
3555         if (rc) {
3556                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3557                         vdev->irq, rc);
3558                 goto req_irq_failed;
3559         }
3560
3561         rc = vio_enable_interrupts(vdev);
3562         if (rc) {
3563                 dev_err(dev, "Error %d enabling interrupts\n", rc);
3564                 goto req_irq_failed;
3565         }
3566
3567         crq->cur = 0;
3568         spin_lock_init(&crq->lock);
3569
3570         return retrc;
3571
3572 req_irq_failed:
3573         do {
3574                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3575         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3576 reg_crq_failed:
3577         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3578 map_failed:
3579         free_page((unsigned long)crq->msgs);
3580         return retrc;
3581 }
3582
3583 /* debugfs for dump */
3584 static int ibmvnic_dump_show(struct seq_file *seq, void *v)
3585 {
3586         struct net_device *netdev = seq->private;
3587         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3588         struct device *dev = &adapter->vdev->dev;
3589         union ibmvnic_crq crq;
3590
3591         memset(&crq, 0, sizeof(crq));
3592         crq.request_dump_size.first = IBMVNIC_CRQ_CMD;
3593         crq.request_dump_size.cmd = REQUEST_DUMP_SIZE;
3594         ibmvnic_send_crq(adapter, &crq);
3595
3596         init_completion(&adapter->fw_done);
3597         wait_for_completion(&adapter->fw_done);
3598
3599         seq_write(seq, adapter->dump_data, adapter->dump_data_size);
3600
3601         dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size,
3602                          DMA_BIDIRECTIONAL);
3603
3604         kfree(adapter->dump_data);
3605
3606         return 0;
3607 }
3608
3609 static int ibmvnic_dump_open(struct inode *inode, struct file *file)
3610 {
3611         return single_open(file, ibmvnic_dump_show, inode->i_private);
3612 }
3613
3614 static const struct file_operations ibmvnic_dump_ops = {
3615         .owner          = THIS_MODULE,
3616         .open           = ibmvnic_dump_open,
3617         .read           = seq_read,
3618         .llseek         = seq_lseek,
3619         .release        = single_release,
3620 };
3621
3622 static void handle_crq_init_rsp(struct work_struct *work)
3623 {
3624         struct ibmvnic_adapter *adapter = container_of(work,
3625                                                        struct ibmvnic_adapter,
3626                                                        vnic_crq_init);
3627         struct device *dev = &adapter->vdev->dev;
3628         struct net_device *netdev = adapter->netdev;
3629         unsigned long timeout = msecs_to_jiffies(30000);
3630         bool restart = false;
3631         int rc;
3632
3633         if (adapter->failover) {
3634                 release_sub_crqs(adapter);
3635                 if (netif_running(netdev)) {
3636                         netif_tx_disable(netdev);
3637                         ibmvnic_close(netdev);
3638                         restart = true;
3639                 }
3640         }
3641
3642         send_version_xchg(adapter);
3643         reinit_completion(&adapter->init_done);
3644         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3645                 dev_err(dev, "Passive init timeout\n");
3646                 goto task_failed;
3647         }
3648
3649         do {
3650                 if (adapter->renegotiate) {
3651                         adapter->renegotiate = false;
3652                         release_sub_crqs_no_irqs(adapter);
3653                         send_cap_queries(adapter);
3654
3655                         reinit_completion(&adapter->init_done);
3656                         if (!wait_for_completion_timeout(&adapter->init_done,
3657                                                          timeout)) {
3658                                 dev_err(dev, "Passive init timeout\n");
3659                                 goto task_failed;
3660                         }
3661                 }
3662         } while (adapter->renegotiate);
3663         rc = init_sub_crq_irqs(adapter);
3664
3665         if (rc)
3666                 goto task_failed;
3667
3668         netdev->real_num_tx_queues = adapter->req_tx_queues;
3669         netdev->mtu = adapter->req_mtu;
3670
3671         if (adapter->failover) {
3672                 adapter->failover = false;
3673                 if (restart) {
3674                         rc = ibmvnic_open(netdev);
3675                         if (rc)
3676                                 goto restart_failed;
3677                 }
3678                 netif_carrier_on(netdev);
3679                 return;
3680         }
3681
3682         rc = register_netdev(netdev);
3683         if (rc) {
3684                 dev_err(dev,
3685                         "failed to register netdev rc=%d\n", rc);
3686                 goto register_failed;
3687         }
3688         dev_info(dev, "ibmvnic registered\n");
3689
3690         return;
3691
3692 restart_failed:
3693         dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc);
3694 register_failed:
3695         release_sub_crqs(adapter);
3696 task_failed:
3697         dev_err(dev, "Passive initialization was not successful\n");
3698 }
3699
3700 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3701 {
3702         unsigned long timeout = msecs_to_jiffies(30000);
3703         struct ibmvnic_adapter *adapter;
3704         struct net_device *netdev;
3705         unsigned char *mac_addr_p;
3706         struct dentry *ent;
3707         char buf[17]; /* debugfs name buf */
3708         int rc;
3709
3710         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3711                 dev->unit_address);
3712
3713         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3714                                                         VETH_MAC_ADDR, NULL);
3715         if (!mac_addr_p) {
3716                 dev_err(&dev->dev,
3717                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3718                         __FILE__, __LINE__);
3719                 return 0;
3720         }
3721
3722         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3723                                    IBMVNIC_MAX_TX_QUEUES);
3724         if (!netdev)
3725                 return -ENOMEM;
3726
3727         adapter = netdev_priv(netdev);
3728         dev_set_drvdata(&dev->dev, netdev);
3729         adapter->vdev = dev;
3730         adapter->netdev = netdev;
3731         adapter->failover = false;
3732
3733         ether_addr_copy(adapter->mac_addr, mac_addr_p);
3734         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3735         netdev->irq = dev->irq;
3736         netdev->netdev_ops = &ibmvnic_netdev_ops;
3737         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3738         SET_NETDEV_DEV(netdev, &dev->dev);
3739
3740         INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp);
3741         INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event);
3742
3743         spin_lock_init(&adapter->stats_lock);
3744
3745         rc = ibmvnic_init_crq_queue(adapter);
3746         if (rc) {
3747                 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc);
3748                 goto free_netdev;
3749         }
3750
3751         INIT_LIST_HEAD(&adapter->errors);
3752         INIT_LIST_HEAD(&adapter->inflight);
3753         spin_lock_init(&adapter->error_list_lock);
3754         spin_lock_init(&adapter->inflight_lock);
3755
3756         adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats,
3757                                               sizeof(struct ibmvnic_statistics),
3758                                               DMA_FROM_DEVICE);
3759         if (dma_mapping_error(&dev->dev, adapter->stats_token)) {
3760                 if (!firmware_has_feature(FW_FEATURE_CMO))
3761                         dev_err(&dev->dev, "Couldn't map stats buffer\n");
3762                 rc = -ENOMEM;
3763                 goto free_crq;
3764         }
3765
3766         snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address);
3767         ent = debugfs_create_dir(buf, NULL);
3768         if (!ent || IS_ERR(ent)) {
3769                 dev_info(&dev->dev, "debugfs create directory failed\n");
3770                 adapter->debugfs_dir = NULL;
3771         } else {
3772                 adapter->debugfs_dir = ent;
3773                 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir,
3774                                           netdev, &ibmvnic_dump_ops);
3775                 if (!ent || IS_ERR(ent)) {
3776                         dev_info(&dev->dev,
3777                                  "debugfs create dump file failed\n");
3778                         adapter->debugfs_dump = NULL;
3779                 } else {
3780                         adapter->debugfs_dump = ent;
3781                 }
3782         }
3783         ibmvnic_send_crq_init(adapter);
3784
3785         init_completion(&adapter->init_done);
3786         if (!wait_for_completion_timeout(&adapter->init_done, timeout))
3787                 return 0;
3788
3789         do {
3790                 if (adapter->renegotiate) {
3791                         adapter->renegotiate = false;
3792                         release_sub_crqs_no_irqs(adapter);
3793                         send_cap_queries(adapter);
3794
3795                         reinit_completion(&adapter->init_done);
3796                         if (!wait_for_completion_timeout(&adapter->init_done,
3797                                                          timeout))
3798                                 return 0;
3799                 }
3800         } while (adapter->renegotiate);
3801
3802         rc = init_sub_crq_irqs(adapter);
3803         if (rc) {
3804                 dev_err(&dev->dev, "failed to initialize sub crq irqs\n");
3805                 goto free_debugfs;
3806         }
3807
3808         netdev->real_num_tx_queues = adapter->req_tx_queues;
3809         netdev->mtu = adapter->req_mtu;
3810
3811         rc = register_netdev(netdev);
3812         if (rc) {
3813                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3814                 goto free_sub_crqs;
3815         }
3816         dev_info(&dev->dev, "ibmvnic registered\n");
3817
3818         return 0;
3819
3820 free_sub_crqs:
3821         release_sub_crqs(adapter);
3822 free_debugfs:
3823         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3824                 debugfs_remove_recursive(adapter->debugfs_dir);
3825 free_crq:
3826         ibmvnic_release_crq_queue(adapter);
3827 free_netdev:
3828         free_netdev(netdev);
3829         return rc;
3830 }
3831
3832 static int ibmvnic_remove(struct vio_dev *dev)
3833 {
3834         struct net_device *netdev = dev_get_drvdata(&dev->dev);
3835         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3836
3837         unregister_netdev(netdev);
3838
3839         release_sub_crqs(adapter);
3840
3841         ibmvnic_release_crq_queue(adapter);
3842
3843         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3844                 debugfs_remove_recursive(adapter->debugfs_dir);
3845
3846         dma_unmap_single(&dev->dev, adapter->stats_token,
3847                          sizeof(struct ibmvnic_statistics), DMA_FROM_DEVICE);
3848
3849         if (adapter->ras_comps)
3850                 dma_free_coherent(&dev->dev,
3851                                   adapter->ras_comp_num *
3852                                   sizeof(struct ibmvnic_fw_component),
3853                                   adapter->ras_comps, adapter->ras_comps_tok);
3854
3855         kfree(adapter->ras_comp_int);
3856
3857         free_netdev(netdev);
3858         dev_set_drvdata(&dev->dev, NULL);
3859
3860         return 0;
3861 }
3862
3863 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3864 {
3865         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3866         struct ibmvnic_adapter *adapter;
3867         struct iommu_table *tbl;
3868         unsigned long ret = 0;
3869         int i;
3870
3871         tbl = get_iommu_table_base(&vdev->dev);
3872
3873         /* netdev inits at probe time along with the structures we need below*/
3874         if (!netdev)
3875                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3876
3877         adapter = netdev_priv(netdev);
3878
3879         ret += PAGE_SIZE; /* the crq message queue */
3880         ret += adapter->bounce_buffer_size;
3881         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3882
3883         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3884                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3885
3886         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3887              i++)
3888                 ret += adapter->rx_pool[i].size *
3889                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3890
3891         return ret;
3892 }
3893
3894 static int ibmvnic_resume(struct device *dev)
3895 {
3896         struct net_device *netdev = dev_get_drvdata(dev);
3897         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3898         int i;
3899
3900         /* kick the interrupt handlers just in case we lost an interrupt */
3901         for (i = 0; i < adapter->req_rx_queues; i++)
3902                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3903                                      adapter->rx_scrq[i]);
3904
3905         return 0;
3906 }
3907
3908 static struct vio_device_id ibmvnic_device_table[] = {
3909         {"network", "IBM,vnic"},
3910         {"", "" }
3911 };
3912 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3913
3914 static const struct dev_pm_ops ibmvnic_pm_ops = {
3915         .resume = ibmvnic_resume
3916 };
3917
3918 static struct vio_driver ibmvnic_driver = {
3919         .id_table       = ibmvnic_device_table,
3920         .probe          = ibmvnic_probe,
3921         .remove         = ibmvnic_remove,
3922         .get_desired_dma = ibmvnic_get_desired_dma,
3923         .name           = ibmvnic_driver_name,
3924         .pm             = &ibmvnic_pm_ops,
3925 };
3926
3927 /* module functions */
3928 static int __init ibmvnic_module_init(void)
3929 {
3930         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3931                 IBMVNIC_DRIVER_VERSION);
3932
3933         return vio_register_driver(&ibmvnic_driver);
3934 }
3935
3936 static void __exit ibmvnic_module_exit(void)
3937 {
3938         vio_unregister_driver(&ibmvnic_driver);
3939 }
3940
3941 module_init(ibmvnic_module_init);
3942 module_exit(ibmvnic_module_exit);