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/seq_file.h>
  78 #include <linux/workqueue.h>
  79
  80 #include "ibmvnic.h"
  81
  82 static const char ibmvnic_driver_name[] = "ibmvnic";
  83 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  84
  85 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
  86 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  87 MODULE_LICENSE("GPL");
  88 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  89
  90 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  91 static int ibmvnic_remove(struct vio_dev *);
  92 static void release_sub_crqs(struct ibmvnic_adapter *);
  93 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *);
  94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  99                        union sub_crq *sub_crq);
 100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
 101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
 102 static int enable_scrq_irq(struct ibmvnic_adapter *,
 103                            struct ibmvnic_sub_crq_queue *);
 104 static int disable_scrq_irq(struct ibmvnic_adapter *,
 105                             struct ibmvnic_sub_crq_queue *);
 106 static int pending_scrq(struct ibmvnic_adapter *,
 107                         struct ibmvnic_sub_crq_queue *);
 108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
 109                                         struct ibmvnic_sub_crq_queue *);
 110 static int ibmvnic_poll(struct napi_struct *napi, int data);
 111 static void send_map_query(struct ibmvnic_adapter *adapter);
 112 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 113 static void send_request_unmap(struct ibmvnic_adapter *, u8);
 114
 115 struct ibmvnic_stat {
 116         char name[ETH_GSTRING_LEN];
 117         int offset;
 118 };
 119
 120 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 121                              offsetof(struct ibmvnic_statistics, stat))
 122 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 123
 124 static const struct ibmvnic_stat ibmvnic_stats[] = {
 125         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 126         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 127         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 128         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 129         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 130         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 131         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 132         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 133         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 134         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 135         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 136         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 137         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 138         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 139         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 140         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 141         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 142         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 143         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 144         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 145         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 146         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 147 };
 148
 149 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 150                           unsigned long length, unsigned long *number,
 151                           unsigned long *irq)
 152 {
 153         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 154         long rc;
 155
 156         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 157         *number = retbuf[0];
 158         *irq = retbuf[1];
 159
 160         return rc;
 161 }
 162
 163 /* net_device_ops functions */
 164
 165 static void init_rx_pool(struct ibmvnic_adapter *adapter,
 166                          struct ibmvnic_rx_pool *rx_pool, int num, int index,
 167                          int buff_size, int active)
 168 {
 169         netdev_dbg(adapter->netdev,
 170                    "Initializing rx_pool %d, %d buffs, %d bytes each\n",
 171                    index, num, buff_size);
 172         rx_pool->size = num;
 173         rx_pool->index = index;
 174         rx_pool->buff_size = buff_size;
 175         rx_pool->active = active;
 176 }
 177
 178 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 179                                 struct ibmvnic_long_term_buff *ltb, int size)
 180 {
 181         struct device *dev = &adapter->vdev->dev;
 182
 183         ltb->size = size;
 184         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 185                                        GFP_KERNEL);
 186
 187         if (!ltb->buff) {
 188                 dev_err(dev, "Couldn't alloc long term buffer\n");
 189                 return -ENOMEM;
 190         }
 191         ltb->map_id = adapter->map_id;
 192         adapter->map_id++;
 193         send_request_map(adapter, ltb->addr,
 194                          ltb->size, ltb->map_id);
 195         init_completion(&adapter->fw_done);
 196         wait_for_completion(&adapter->fw_done);
 197         return 0;
 198 }
 199
 200 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 201                                 struct ibmvnic_long_term_buff *ltb)
 202 {
 203         struct device *dev = &adapter->vdev->dev;
 204
 205         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 206         if (!adapter->failover)
 207                 send_request_unmap(adapter, ltb->map_id);
 208 }
 209
 210 static int alloc_rx_pool(struct ibmvnic_adapter *adapter,
 211                          struct ibmvnic_rx_pool *pool)
 212 {
 213         struct device *dev = &adapter->vdev->dev;
 214         int i;
 215
 216         pool->free_map = kcalloc(pool->size, sizeof(int), GFP_KERNEL);
 217         if (!pool->free_map)
 218                 return -ENOMEM;
 219
 220         pool->rx_buff = kcalloc(pool->size, sizeof(struct ibmvnic_rx_buff),
 221                                 GFP_KERNEL);
 222
 223         if (!pool->rx_buff) {
 224                 dev_err(dev, "Couldn't alloc rx buffers\n");
 225                 kfree(pool->free_map);
 226                 return -ENOMEM;
 227         }
 228
 229         if (alloc_long_term_buff(adapter, &pool->long_term_buff,
 230                                  pool->size * pool->buff_size)) {
 231                 kfree(pool->free_map);
 232                 kfree(pool->rx_buff);
 233                 return -ENOMEM;
 234         }
 235
 236         for (i = 0; i < pool->size; ++i)
 237                 pool->free_map[i] = i;
 238
 239         atomic_set(&pool->available, 0);
 240         pool->next_alloc = 0;
 241         pool->next_free = 0;
 242
 243         return 0;
 244 }
 245
 246 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 247                               struct ibmvnic_rx_pool *pool)
 248 {
 249         int count = pool->size - atomic_read(&pool->available);
 250         struct device *dev = &adapter->vdev->dev;
 251         int buffers_added = 0;
 252         unsigned long lpar_rc;
 253         union sub_crq sub_crq;
 254         struct sk_buff *skb;
 255         unsigned int offset;
 256         dma_addr_t dma_addr;
 257         unsigned char *dst;
 258         u64 *handle_array;
 259         int shift = 0;
 260         int index;
 261         int i;
 262
 263         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 264                                       be32_to_cpu(adapter->login_rsp_buf->
 265                                       off_rxadd_subcrqs));
 266
 267         for (i = 0; i < count; ++i) {
 268                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 269                 if (!skb) {
 270                         dev_err(dev, "Couldn't replenish rx buff\n");
 271                         adapter->replenish_no_mem++;
 272                         break;
 273                 }
 274
 275                 index = pool->free_map[pool->next_free];
 276
 277                 if (pool->rx_buff[index].skb)
 278                         dev_err(dev, "Inconsistent free_map!\n");
 279
 280                 /* Copy the skb to the long term mapped DMA buffer */
 281                 offset = index * pool->buff_size;
 282                 dst = pool->long_term_buff.buff + offset;
 283                 memset(dst, 0, pool->buff_size);
 284                 dma_addr = pool->long_term_buff.addr + offset;
 285                 pool->rx_buff[index].data = dst;
 286
 287                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 288                 pool->rx_buff[index].dma = dma_addr;
 289                 pool->rx_buff[index].skb = skb;
 290                 pool->rx_buff[index].pool_index = pool->index;
 291                 pool->rx_buff[index].size = pool->buff_size;
 292
 293                 memset(&sub_crq, 0, sizeof(sub_crq));
 294                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 295                 sub_crq.rx_add.correlator =
 296                     cpu_to_be64((u64)&pool->rx_buff[index]);
 297                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 298                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 299
 300                 /* The length field of the sCRQ is defined to be 24 bits so the
 301                  * buffer size needs to be left shifted by a byte before it is
 302                  * converted to big endian to prevent the last byte from being
 303                  * truncated.
 304                  */
 305 #ifdef __LITTLE_ENDIAN__
 306                 shift = 8;
 307 #endif
 308                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 309
 310                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 311                                       &sub_crq);
 312                 if (lpar_rc != H_SUCCESS)
 313                         goto failure;
 314
 315                 buffers_added++;
 316                 adapter->replenish_add_buff_success++;
 317                 pool->next_free = (pool->next_free + 1) % pool->size;
 318         }
 319         atomic_add(buffers_added, &pool->available);
 320         return;
 321
 322 failure:
 323         dev_info(dev, "replenish pools failure\n");
 324         pool->free_map[pool->next_free] = index;
 325         pool->rx_buff[index].skb = NULL;
 326         if (!dma_mapping_error(dev, dma_addr))
 327                 dma_unmap_single(dev, dma_addr, pool->buff_size,
 328                                  DMA_FROM_DEVICE);
 329
 330         dev_kfree_skb_any(skb);
 331         adapter->replenish_add_buff_failure++;
 332         atomic_add(buffers_added, &pool->available);
 333 }
 334
 335 static void replenish_pools(struct ibmvnic_adapter *adapter)
 336 {
 337         int i;
 338
 339         if (adapter->migrated)
 340                 return;
 341
 342         adapter->replenish_task_cycles++;
 343         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 344              i++) {
 345                 if (adapter->rx_pool[i].active)
 346                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 347         }
 348 }
 349
 350 static void free_rx_pool(struct ibmvnic_adapter *adapter,
 351                          struct ibmvnic_rx_pool *pool)
 352 {
 353         int i;
 354
 355         kfree(pool->free_map);
 356         pool->free_map = NULL;
 357
 358         if (!pool->rx_buff)
 359                 return;
 360
 361         for (i = 0; i < pool->size; i++) {
 362                 if (pool->rx_buff[i].skb) {
 363                         dev_kfree_skb_any(pool->rx_buff[i].skb);
 364                         pool->rx_buff[i].skb = NULL;
 365                 }
 366         }
 367         kfree(pool->rx_buff);
 368         pool->rx_buff = NULL;
 369 }
 370
 371 static int ibmvnic_open(struct net_device *netdev)
 372 {
 373         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 374         struct device *dev = &adapter->vdev->dev;
 375         struct ibmvnic_tx_pool *tx_pool;
 376         union ibmvnic_crq crq;
 377         int rxadd_subcrqs;
 378         u64 *size_array;
 379         int tx_subcrqs;
 380         int i, j;
 381
 382         rxadd_subcrqs =
 383             be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 384         tx_subcrqs =
 385             be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 386         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 387                                   be32_to_cpu(adapter->login_rsp_buf->
 388                                               off_rxadd_buff_size));
 389         adapter->map_id = 1;
 390         adapter->napi = kcalloc(adapter->req_rx_queues,
 391                                 sizeof(struct napi_struct), GFP_KERNEL);
 392         if (!adapter->napi)
 393                 goto alloc_napi_failed;
 394         for (i = 0; i < adapter->req_rx_queues; i++) {
 395                 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
 396                                NAPI_POLL_WEIGHT);
 397                 napi_enable(&adapter->napi[i]);
 398         }
 399         adapter->rx_pool =
 400             kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL);
 401
 402         if (!adapter->rx_pool)
 403                 goto rx_pool_arr_alloc_failed;
 404         send_map_query(adapter);
 405         for (i = 0; i < rxadd_subcrqs; i++) {
 406                 init_rx_pool(adapter, &adapter->rx_pool[i],
 407                              IBMVNIC_BUFFS_PER_POOL, i,
 408                              be64_to_cpu(size_array[i]), 1);
 409                 if (alloc_rx_pool(adapter, &adapter->rx_pool[i])) {
 410                         dev_err(dev, "Couldn't alloc rx pool\n");
 411                         goto rx_pool_alloc_failed;
 412                 }
 413         }
 414         adapter->tx_pool =
 415             kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 416
 417         if (!adapter->tx_pool)
 418                 goto tx_pool_arr_alloc_failed;
 419         for (i = 0; i < tx_subcrqs; i++) {
 420                 tx_pool = &adapter->tx_pool[i];
 421                 tx_pool->tx_buff =
 422                     kcalloc(adapter->max_tx_entries_per_subcrq,
 423                             sizeof(struct ibmvnic_tx_buff), GFP_KERNEL);
 424                 if (!tx_pool->tx_buff)
 425                         goto tx_pool_alloc_failed;
 426
 427                 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 428                                          adapter->max_tx_entries_per_subcrq *
 429                                          adapter->req_mtu))
 430                         goto tx_ltb_alloc_failed;
 431
 432                 tx_pool->free_map =
 433                     kcalloc(adapter->max_tx_entries_per_subcrq,
 434                             sizeof(int), GFP_KERNEL);
 435                 if (!tx_pool->free_map)
 436                         goto tx_fm_alloc_failed;
 437
 438                 for (j = 0; j < adapter->max_tx_entries_per_subcrq; j++)
 439                         tx_pool->free_map[j] = j;
 440
 441                 tx_pool->consumer_index = 0;
 442                 tx_pool->producer_index = 0;
 443         }
 444         adapter->bounce_buffer_size =
 445             (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1;
 446         adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size,
 447                                          GFP_KERNEL);
 448         if (!adapter->bounce_buffer)
 449                 goto bounce_alloc_failed;
 450
 451         adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer,
 452                                                     adapter->bounce_buffer_size,
 453                                                     DMA_TO_DEVICE);
 454         if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
 455                 dev_err(dev, "Couldn't map tx bounce buffer\n");
 456                 goto bounce_map_failed;
 457         }
 458         replenish_pools(adapter);
 459
 460         /* We're ready to receive frames, enable the sub-crq interrupts and
 461          * set the logical link state to up
 462          */
 463         for (i = 0; i < adapter->req_rx_queues; i++)
 464                 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
 465
 466         for (i = 0; i < adapter->req_tx_queues; i++)
 467                 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
 468
 469         memset(&crq, 0, sizeof(crq));
 470         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 471         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 472         crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP;
 473         ibmvnic_send_crq(adapter, &crq);
 474
 475         netif_tx_start_all_queues(netdev);
 476
 477         return 0;
 478
 479 bounce_map_failed:
 480         kfree(adapter->bounce_buffer);
 481 bounce_alloc_failed:
 482         i = tx_subcrqs - 1;
 483         kfree(adapter->tx_pool[i].free_map);
 484 tx_fm_alloc_failed:
 485         free_long_term_buff(adapter, &adapter->tx_pool[i].long_term_buff);
 486 tx_ltb_alloc_failed:
 487         kfree(adapter->tx_pool[i].tx_buff);
 488 tx_pool_alloc_failed:
 489         for (j = 0; j < i; j++) {
 490                 kfree(adapter->tx_pool[j].tx_buff);
 491                 free_long_term_buff(adapter,
 492                                     &adapter->tx_pool[j].long_term_buff);
 493                 kfree(adapter->tx_pool[j].free_map);
 494         }
 495         kfree(adapter->tx_pool);
 496         adapter->tx_pool = NULL;
 497 tx_pool_arr_alloc_failed:
 498         i = rxadd_subcrqs;
 499 rx_pool_alloc_failed:
 500         for (j = 0; j < i; j++) {
 501                 free_rx_pool(adapter, &adapter->rx_pool[j]);
 502                 free_long_term_buff(adapter,
 503                                     &adapter->rx_pool[j].long_term_buff);
 504         }
 505         kfree(adapter->rx_pool);
 506         adapter->rx_pool = NULL;
 507 rx_pool_arr_alloc_failed:
 508         for (i = 0; i < adapter->req_rx_queues; i++)
 509                 napi_enable(&adapter->napi[i]);
 510 alloc_napi_failed:
 511         return -ENOMEM;
 512 }
 513
 514 static int ibmvnic_close(struct net_device *netdev)
 515 {
 516         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 517         struct device *dev = &adapter->vdev->dev;
 518         union ibmvnic_crq crq;
 519         int i;
 520
 521         adapter->closing = true;
 522
 523         for (i = 0; i < adapter->req_rx_queues; i++)
 524                 napi_disable(&adapter->napi[i]);
 525
 526         if (!adapter->failover)
 527                 netif_tx_stop_all_queues(netdev);
 528
 529         if (adapter->bounce_buffer) {
 530                 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
 531                         dma_unmap_single(&adapter->vdev->dev,
 532                                          adapter->bounce_buffer_dma,
 533                                          adapter->bounce_buffer_size,
 534                                          DMA_BIDIRECTIONAL);
 535                         adapter->bounce_buffer_dma = DMA_ERROR_CODE;
 536                 }
 537                 kfree(adapter->bounce_buffer);
 538                 adapter->bounce_buffer = NULL;
 539         }
 540
 541         memset(&crq, 0, sizeof(crq));
 542         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 543         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 544         crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN;
 545         ibmvnic_send_crq(adapter, &crq);
 546
 547         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 548              i++) {
 549                 kfree(adapter->tx_pool[i].tx_buff);
 550                 free_long_term_buff(adapter,
 551                                     &adapter->tx_pool[i].long_term_buff);
 552                 kfree(adapter->tx_pool[i].free_map);
 553         }
 554         kfree(adapter->tx_pool);
 555         adapter->tx_pool = NULL;
 556
 557         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 558              i++) {
 559                 free_rx_pool(adapter, &adapter->rx_pool[i]);
 560                 free_long_term_buff(adapter,
 561                                     &adapter->rx_pool[i].long_term_buff);
 562         }
 563         kfree(adapter->rx_pool);
 564         adapter->rx_pool = NULL;
 565
 566         adapter->closing = false;
 567
 568         return 0;
 569 }
 570
 571 /**
 572  * build_hdr_data - creates L2/L3/L4 header data buffer
 573  * @hdr_field - bitfield determining needed headers
 574  * @skb - socket buffer
 575  * @hdr_len - array of header lengths
 576  * @tot_len - total length of data
 577  *
 578  * Reads hdr_field to determine which headers are needed by firmware.
 579  * Builds a buffer containing these headers.  Saves individual header
 580  * lengths and total buffer length to be used to build descriptors.
 581  */
 582 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
 583                           int *hdr_len, u8 *hdr_data)
 584 {
 585         int len = 0;
 586         u8 *hdr;
 587
 588         hdr_len[0] = sizeof(struct ethhdr);
 589
 590         if (skb->protocol == htons(ETH_P_IP)) {
 591                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
 592                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 593                         hdr_len[2] = tcp_hdrlen(skb);
 594                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
 595                         hdr_len[2] = sizeof(struct udphdr);
 596         } else if (skb->protocol == htons(ETH_P_IPV6)) {
 597                 hdr_len[1] = sizeof(struct ipv6hdr);
 598                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
 599                         hdr_len[2] = tcp_hdrlen(skb);
 600                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
 601                         hdr_len[2] = sizeof(struct udphdr);
 602         }
 603
 604         memset(hdr_data, 0, 120);
 605         if ((hdr_field >> 6) & 1) {
 606                 hdr = skb_mac_header(skb);
 607                 memcpy(hdr_data, hdr, hdr_len[0]);
 608                 len += hdr_len[0];
 609         }
 610
 611         if ((hdr_field >> 5) & 1) {
 612                 hdr = skb_network_header(skb);
 613                 memcpy(hdr_data + len, hdr, hdr_len[1]);
 614                 len += hdr_len[1];
 615         }
 616
 617         if ((hdr_field >> 4) & 1) {
 618                 hdr = skb_transport_header(skb);
 619                 memcpy(hdr_data + len, hdr, hdr_len[2]);
 620                 len += hdr_len[2];
 621         }
 622         return len;
 623 }
 624
 625 /**
 626  * create_hdr_descs - create header and header extension descriptors
 627  * @hdr_field - bitfield determining needed headers
 628  * @data - buffer containing header data
 629  * @len - length of data buffer
 630  * @hdr_len - array of individual header lengths
 631  * @scrq_arr - descriptor array
 632  *
 633  * Creates header and, if needed, header extension descriptors and
 634  * places them in a descriptor array, scrq_arr
 635  */
 636
 637 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
 638                              union sub_crq *scrq_arr)
 639 {
 640         union sub_crq hdr_desc;
 641         int tmp_len = len;
 642         u8 *data, *cur;
 643         int tmp;
 644
 645         while (tmp_len > 0) {
 646                 cur = hdr_data + len - tmp_len;
 647
 648                 memset(&hdr_desc, 0, sizeof(hdr_desc));
 649                 if (cur != hdr_data) {
 650                         data = hdr_desc.hdr_ext.data;
 651                         tmp = tmp_len > 29 ? 29 : tmp_len;
 652                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
 653                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
 654                         hdr_desc.hdr_ext.len = tmp;
 655                 } else {
 656                         data = hdr_desc.hdr.data;
 657                         tmp = tmp_len > 24 ? 24 : tmp_len;
 658                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
 659                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
 660                         hdr_desc.hdr.len = tmp;
 661                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
 662                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
 663                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
 664                         hdr_desc.hdr.flag = hdr_field << 1;
 665                 }
 666                 memcpy(data, cur, tmp);
 667                 tmp_len -= tmp;
 668                 *scrq_arr = hdr_desc;
 669                 scrq_arr++;
 670         }
 671 }
 672
 673 /**
 674  * build_hdr_descs_arr - build a header descriptor array
 675  * @skb - socket buffer
 676  * @num_entries - number of descriptors to be sent
 677  * @subcrq - first TX descriptor
 678  * @hdr_field - bit field determining which headers will be sent
 679  *
 680  * This function will build a TX descriptor array with applicable
 681  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
 682  */
 683
 684 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
 685                                 int *num_entries, u8 hdr_field)
 686 {
 687         int hdr_len[3] = {0, 0, 0};
 688         int tot_len, len;
 689         u8 *hdr_data = txbuff->hdr_data;
 690
 691         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
 692                                  txbuff->hdr_data);
 693         len = tot_len;
 694         len -= 24;
 695         if (len > 0)
 696                 num_entries += len % 29 ? len / 29 + 1 : len / 29;
 697         create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
 698                          txbuff->indir_arr + 1);
 699 }
 700
 701 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 702 {
 703         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 704         int queue_num = skb_get_queue_mapping(skb);
 705         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
 706         struct device *dev = &adapter->vdev->dev;
 707         struct ibmvnic_tx_buff *tx_buff = NULL;
 708         struct ibmvnic_tx_pool *tx_pool;
 709         unsigned int tx_send_failed = 0;
 710         unsigned int tx_map_failed = 0;
 711         unsigned int tx_dropped = 0;
 712         unsigned int tx_packets = 0;
 713         unsigned int tx_bytes = 0;
 714         dma_addr_t data_dma_addr;
 715         struct netdev_queue *txq;
 716         bool used_bounce = false;
 717         unsigned long lpar_rc;
 718         union sub_crq tx_crq;
 719         unsigned int offset;
 720         int num_entries = 1;
 721         unsigned char *dst;
 722         u64 *handle_array;
 723         int index = 0;
 724         int ret = 0;
 725
 726         tx_pool = &adapter->tx_pool[queue_num];
 727         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
 728         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 729                                    be32_to_cpu(adapter->login_rsp_buf->
 730                                                off_txsubm_subcrqs));
 731         if (adapter->migrated) {
 732                 tx_send_failed++;
 733                 tx_dropped++;
 734                 ret = NETDEV_TX_BUSY;
 735                 goto out;
 736         }
 737
 738         index = tx_pool->free_map[tx_pool->consumer_index];
 739         offset = index * adapter->req_mtu;
 740         dst = tx_pool->long_term_buff.buff + offset;
 741         memset(dst, 0, adapter->req_mtu);
 742         skb_copy_from_linear_data(skb, dst, skb->len);
 743         data_dma_addr = tx_pool->long_term_buff.addr + offset;
 744
 745         tx_pool->consumer_index =
 746             (tx_pool->consumer_index + 1) %
 747                 adapter->max_tx_entries_per_subcrq;
 748
 749         tx_buff = &tx_pool->tx_buff[index];
 750         tx_buff->skb = skb;
 751         tx_buff->data_dma[0] = data_dma_addr;
 752         tx_buff->data_len[0] = skb->len;
 753         tx_buff->index = index;
 754         tx_buff->pool_index = queue_num;
 755         tx_buff->last_frag = true;
 756         tx_buff->used_bounce = used_bounce;
 757
 758         memset(&tx_crq, 0, sizeof(tx_crq));
 759         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
 760         tx_crq.v1.type = IBMVNIC_TX_DESC;
 761         tx_crq.v1.n_crq_elem = 1;
 762         tx_crq.v1.n_sge = 1;
 763         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
 764         tx_crq.v1.correlator = cpu_to_be32(index);
 765         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
 766         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
 767         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
 768
 769         if (adapter->vlan_header_insertion) {
 770                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
 771                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
 772         }
 773
 774         if (skb->protocol == htons(ETH_P_IP)) {
 775                 if (ip_hdr(skb)->version == 4)
 776                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
 777                 else if (ip_hdr(skb)->version == 6)
 778                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
 779
 780                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 781                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
 782                 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
 783                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
 784         }
 785
 786         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 787                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
 788                 hdrs += 2;
 789         }
 790         /* determine if l2/3/4 headers are sent to firmware */
 791         if ((*hdrs >> 7) & 1 &&
 792             (skb->protocol == htons(ETH_P_IP) ||
 793              skb->protocol == htons(ETH_P_IPV6))) {
 794                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
 795                 tx_crq.v1.n_crq_elem = num_entries;
 796                 tx_buff->indir_arr[0] = tx_crq;
 797                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
 798                                                     sizeof(tx_buff->indir_arr),
 799                                                     DMA_TO_DEVICE);
 800                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
 801                         if (!firmware_has_feature(FW_FEATURE_CMO))
 802                                 dev_err(dev, "tx: unable to map descriptor array\n");
 803                         tx_map_failed++;
 804                         tx_dropped++;
 805                         ret = NETDEV_TX_BUSY;
 806                         goto out;
 807                 }
 808                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
 809                                                (u64)tx_buff->indir_dma,
 810                                                (u64)num_entries);
 811         } else {
 812                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
 813                                       &tx_crq);
 814         }
 815         if (lpar_rc != H_SUCCESS) {
 816                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
 817
 818                 if (tx_pool->consumer_index == 0)
 819                         tx_pool->consumer_index =
 820                                 adapter->max_tx_entries_per_subcrq - 1;
 821                 else
 822                         tx_pool->consumer_index--;
 823
 824                 tx_send_failed++;
 825                 tx_dropped++;
 826                 ret = NETDEV_TX_BUSY;
 827                 goto out;
 828         }
 829         tx_packets++;
 830         tx_bytes += skb->len;
 831         txq->trans_start = jiffies;
 832         ret = NETDEV_TX_OK;
 833
 834 out:
 835         netdev->stats.tx_dropped += tx_dropped;
 836         netdev->stats.tx_bytes += tx_bytes;
 837         netdev->stats.tx_packets += tx_packets;
 838         adapter->tx_send_failed += tx_send_failed;
 839         adapter->tx_map_failed += tx_map_failed;
 840
 841         return ret;
 842 }
 843
 844 static void ibmvnic_set_multi(struct net_device *netdev)
 845 {
 846         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 847         struct netdev_hw_addr *ha;
 848         union ibmvnic_crq crq;
 849
 850         memset(&crq, 0, sizeof(crq));
 851         crq.request_capability.first = IBMVNIC_CRQ_CMD;
 852         crq.request_capability.cmd = REQUEST_CAPABILITY;
 853
 854         if (netdev->flags & IFF_PROMISC) {
 855                 if (!adapter->promisc_supported)
 856                         return;
 857         } else {
 858                 if (netdev->flags & IFF_ALLMULTI) {
 859                         /* Accept all multicast */
 860                         memset(&crq, 0, sizeof(crq));
 861                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 862                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 863                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
 864                         ibmvnic_send_crq(adapter, &crq);
 865                 } else if (netdev_mc_empty(netdev)) {
 866                         /* Reject all multicast */
 867                         memset(&crq, 0, sizeof(crq));
 868                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 869                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 870                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
 871                         ibmvnic_send_crq(adapter, &crq);
 872                 } else {
 873                         /* Accept one or more multicast(s) */
 874                         netdev_for_each_mc_addr(ha, netdev) {
 875                                 memset(&crq, 0, sizeof(crq));
 876                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 877                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 878                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
 879                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
 880                                                 ha->addr);
 881                                 ibmvnic_send_crq(adapter, &crq);
 882                         }
 883                 }
 884         }
 885 }
 886
 887 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
 888 {
 889         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 890         struct sockaddr *addr = p;
 891         union ibmvnic_crq crq;
 892
 893         if (!is_valid_ether_addr(addr->sa_data))
 894                 return -EADDRNOTAVAIL;
 895
 896         memset(&crq, 0, sizeof(crq));
 897         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
 898         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
 899         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
 900         ibmvnic_send_crq(adapter, &crq);
 901         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
 902         return 0;
 903 }
 904
 905 static void ibmvnic_tx_timeout(struct net_device *dev)
 906 {
 907         struct ibmvnic_adapter *adapter = netdev_priv(dev);
 908         int rc;
 909
 910         /* Adapter timed out, resetting it */
 911         release_sub_crqs(adapter);
 912         rc = ibmvnic_reset_crq(adapter);
 913         if (rc)
 914                 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
 915         else
 916                 ibmvnic_send_crq_init(adapter);
 917 }
 918
 919 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
 920                                   struct ibmvnic_rx_buff *rx_buff)
 921 {
 922         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
 923
 924         rx_buff->skb = NULL;
 925
 926         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
 927         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
 928
 929         atomic_dec(&pool->available);
 930 }
 931
 932 static int ibmvnic_poll(struct napi_struct *napi, int budget)
 933 {
 934         struct net_device *netdev = napi->dev;
 935         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 936         int scrq_num = (int)(napi - adapter->napi);
 937         int frames_processed = 0;
 938 restart_poll:
 939         while (frames_processed < budget) {
 940                 struct sk_buff *skb;
 941                 struct ibmvnic_rx_buff *rx_buff;
 942                 union sub_crq *next;
 943                 u32 length;
 944                 u16 offset;
 945                 u8 flags = 0;
 946
 947                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
 948                         break;
 949                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
 950                 rx_buff =
 951                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
 952                                                           rx_comp.correlator);
 953                 /* do error checking */
 954                 if (next->rx_comp.rc) {
 955                         netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
 956                         /* free the entry */
 957                         next->rx_comp.first = 0;
 958                         remove_buff_from_pool(adapter, rx_buff);
 959                         break;
 960                 }
 961
 962                 length = be32_to_cpu(next->rx_comp.len);
 963                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
 964                 flags = next->rx_comp.flags;
 965                 skb = rx_buff->skb;
 966                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
 967                                         length);
 968                 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
 969                 /* free the entry */
 970                 next->rx_comp.first = 0;
 971                 remove_buff_from_pool(adapter, rx_buff);
 972
 973                 skb_put(skb, length);
 974                 skb->protocol = eth_type_trans(skb, netdev);
 975
 976                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
 977                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
 978                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 979                 }
 980
 981                 length = skb->len;
 982                 napi_gro_receive(napi, skb); /* send it up */
 983                 netdev->stats.rx_packets++;
 984                 netdev->stats.rx_bytes += length;
 985                 frames_processed++;
 986         }
 987         replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
 988
 989         if (frames_processed < budget) {
 990                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
 991                 napi_complete(napi);
 992                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
 993                     napi_reschedule(napi)) {
 994                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
 995                         goto restart_poll;
 996                 }
 997         }
 998         return frames_processed;
 999 }
1000
1001 #ifdef CONFIG_NET_POLL_CONTROLLER
1002 static void ibmvnic_netpoll_controller(struct net_device *dev)
1003 {
1004         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1005         int i;
1006
1007         replenish_pools(netdev_priv(dev));
1008         for (i = 0; i < adapter->req_rx_queues; i++)
1009                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1010                                      adapter->rx_scrq[i]);
1011 }
1012 #endif
1013
1014 static const struct net_device_ops ibmvnic_netdev_ops = {
1015         .ndo_open               = ibmvnic_open,
1016         .ndo_stop               = ibmvnic_close,
1017         .ndo_start_xmit         = ibmvnic_xmit,
1018         .ndo_set_rx_mode        = ibmvnic_set_multi,
1019         .ndo_set_mac_address    = ibmvnic_set_mac,
1020         .ndo_validate_addr      = eth_validate_addr,
1021         .ndo_tx_timeout         = ibmvnic_tx_timeout,
1022 #ifdef CONFIG_NET_POLL_CONTROLLER
1023         .ndo_poll_controller    = ibmvnic_netpoll_controller,
1024 #endif
1025 };
1026
1027 /* ethtool functions */
1028
1029 static int ibmvnic_get_settings(struct net_device *netdev,
1030                                 struct ethtool_cmd *cmd)
1031 {
1032         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1033                           SUPPORTED_FIBRE);
1034         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1035                             ADVERTISED_FIBRE);
1036         ethtool_cmd_speed_set(cmd, SPEED_1000);
1037         cmd->duplex = DUPLEX_FULL;
1038         cmd->port = PORT_FIBRE;
1039         cmd->phy_address = 0;
1040         cmd->transceiver = XCVR_INTERNAL;
1041         cmd->autoneg = AUTONEG_ENABLE;
1042         cmd->maxtxpkt = 0;
1043         cmd->maxrxpkt = 1;
1044         return 0;
1045 }
1046
1047 static void ibmvnic_get_drvinfo(struct net_device *dev,
1048                                 struct ethtool_drvinfo *info)
1049 {
1050         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1051         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1052 }
1053
1054 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1055 {
1056         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1057
1058         return adapter->msg_enable;
1059 }
1060
1061 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1062 {
1063         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1064
1065         adapter->msg_enable = data;
1066 }
1067
1068 static u32 ibmvnic_get_link(struct net_device *netdev)
1069 {
1070         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1071
1072         /* Don't need to send a query because we request a logical link up at
1073          * init and then we wait for link state indications
1074          */
1075         return adapter->logical_link_state;
1076 }
1077
1078 static void ibmvnic_get_ringparam(struct net_device *netdev,
1079                                   struct ethtool_ringparam *ring)
1080 {
1081         ring->rx_max_pending = 0;
1082         ring->tx_max_pending = 0;
1083         ring->rx_mini_max_pending = 0;
1084         ring->rx_jumbo_max_pending = 0;
1085         ring->rx_pending = 0;
1086         ring->tx_pending = 0;
1087         ring->rx_mini_pending = 0;
1088         ring->rx_jumbo_pending = 0;
1089 }
1090
1091 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1092 {
1093         int i;
1094
1095         if (stringset != ETH_SS_STATS)
1096                 return;
1097
1098         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1099                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1100 }
1101
1102 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1103 {
1104         switch (sset) {
1105         case ETH_SS_STATS:
1106                 return ARRAY_SIZE(ibmvnic_stats);
1107         default:
1108                 return -EOPNOTSUPP;
1109         }
1110 }
1111
1112 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1113                                       struct ethtool_stats *stats, u64 *data)
1114 {
1115         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1116         union ibmvnic_crq crq;
1117         int i;
1118
1119         memset(&crq, 0, sizeof(crq));
1120         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1121         crq.request_statistics.cmd = REQUEST_STATISTICS;
1122         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1123         crq.request_statistics.len =
1124             cpu_to_be32(sizeof(struct ibmvnic_statistics));
1125         ibmvnic_send_crq(adapter, &crq);
1126
1127         /* Wait for data to be written */
1128         init_completion(&adapter->stats_done);
1129         wait_for_completion(&adapter->stats_done);
1130
1131         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1132                 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1133 }
1134
1135 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1136         .get_settings           = ibmvnic_get_settings,
1137         .get_drvinfo            = ibmvnic_get_drvinfo,
1138         .get_msglevel           = ibmvnic_get_msglevel,
1139         .set_msglevel           = ibmvnic_set_msglevel,
1140         .get_link               = ibmvnic_get_link,
1141         .get_ringparam          = ibmvnic_get_ringparam,
1142         .get_strings            = ibmvnic_get_strings,
1143         .get_sset_count         = ibmvnic_get_sset_count,
1144         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
1145 };
1146
1147 /* Routines for managing CRQs/sCRQs  */
1148
1149 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1150                                   struct ibmvnic_sub_crq_queue *scrq)
1151 {
1152         struct device *dev = &adapter->vdev->dev;
1153         long rc;
1154
1155         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1156
1157         /* Close the sub-crqs */
1158         do {
1159                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1160                                         adapter->vdev->unit_address,
1161                                         scrq->crq_num);
1162         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1163
1164         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1165                          DMA_BIDIRECTIONAL);
1166         free_pages((unsigned long)scrq->msgs, 2);
1167         kfree(scrq);
1168 }
1169
1170 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1171                                                         *adapter)
1172 {
1173         struct device *dev = &adapter->vdev->dev;
1174         struct ibmvnic_sub_crq_queue *scrq;
1175         int rc;
1176
1177         scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1178         if (!scrq)
1179                 return NULL;
1180
1181         scrq->msgs = (union sub_crq *)__get_free_pages(GFP_ATOMIC, 2);
1182         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1183         if (!scrq->msgs) {
1184                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1185                 goto zero_page_failed;
1186         }
1187
1188         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1189                                          DMA_BIDIRECTIONAL);
1190         if (dma_mapping_error(dev, scrq->msg_token)) {
1191                 dev_warn(dev, "Couldn't map crq queue messages page\n");
1192                 goto map_failed;
1193         }
1194
1195         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1196                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1197
1198         if (rc == H_RESOURCE)
1199                 rc = ibmvnic_reset_crq(adapter);
1200
1201         if (rc == H_CLOSED) {
1202                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1203         } else if (rc) {
1204                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1205                 goto reg_failed;
1206         }
1207
1208         scrq->adapter = adapter;
1209         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1210         scrq->cur = 0;
1211         scrq->rx_skb_top = NULL;
1212         spin_lock_init(&scrq->lock);
1213
1214         netdev_dbg(adapter->netdev,
1215                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1216                    scrq->crq_num, scrq->hw_irq, scrq->irq);
1217
1218         return scrq;
1219
1220 reg_failed:
1221         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1222                          DMA_BIDIRECTIONAL);
1223 map_failed:
1224         free_pages((unsigned long)scrq->msgs, 2);
1225 zero_page_failed:
1226         kfree(scrq);
1227
1228         return NULL;
1229 }
1230
1231 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1232 {
1233         int i;
1234
1235         if (adapter->tx_scrq) {
1236                 for (i = 0; i < adapter->req_tx_queues; i++)
1237                         if (adapter->tx_scrq[i]) {
1238                                 free_irq(adapter->tx_scrq[i]->irq,
1239                                          adapter->tx_scrq[i]);
1240                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1241                                 release_sub_crq_queue(adapter,
1242                                                       adapter->tx_scrq[i]);
1243                         }
1244                 adapter->tx_scrq = NULL;
1245         }
1246
1247         if (adapter->rx_scrq) {
1248                 for (i = 0; i < adapter->req_rx_queues; i++)
1249                         if (adapter->rx_scrq[i]) {
1250                                 free_irq(adapter->rx_scrq[i]->irq,
1251                                          adapter->rx_scrq[i]);
1252                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1253                                 release_sub_crq_queue(adapter,
1254                                                       adapter->rx_scrq[i]);
1255                         }
1256                 adapter->rx_scrq = NULL;
1257         }
1258
1259         adapter->requested_caps = 0;
1260 }
1261
1262 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *adapter)
1263 {
1264         int i;
1265
1266         if (adapter->tx_scrq) {
1267                 for (i = 0; i < adapter->req_tx_queues; i++)
1268                         if (adapter->tx_scrq[i])
1269                                 release_sub_crq_queue(adapter,
1270                                                       adapter->tx_scrq[i]);
1271                 adapter->tx_scrq = NULL;
1272         }
1273
1274         if (adapter->rx_scrq) {
1275                 for (i = 0; i < adapter->req_rx_queues; i++)
1276                         if (adapter->rx_scrq[i])
1277                                 release_sub_crq_queue(adapter,
1278                                                       adapter->rx_scrq[i]);
1279                 adapter->rx_scrq = NULL;
1280         }
1281
1282         adapter->requested_caps = 0;
1283 }
1284
1285 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1286                             struct ibmvnic_sub_crq_queue *scrq)
1287 {
1288         struct device *dev = &adapter->vdev->dev;
1289         unsigned long rc;
1290
1291         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1292                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1293         if (rc)
1294                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1295                         scrq->hw_irq, rc);
1296         return rc;
1297 }
1298
1299 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1300                            struct ibmvnic_sub_crq_queue *scrq)
1301 {
1302         struct device *dev = &adapter->vdev->dev;
1303         unsigned long rc;
1304
1305         if (scrq->hw_irq > 0x100000000ULL) {
1306                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1307                 return 1;
1308         }
1309
1310         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1311                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1312         if (rc)
1313                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1314                         scrq->hw_irq, rc);
1315         return rc;
1316 }
1317
1318 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1319                                struct ibmvnic_sub_crq_queue *scrq)
1320 {
1321         struct device *dev = &adapter->vdev->dev;
1322         struct ibmvnic_tx_buff *txbuff;
1323         union sub_crq *next;
1324         int index;
1325         int i, j;
1326         u8 first;
1327
1328 restart_loop:
1329         while (pending_scrq(adapter, scrq)) {
1330                 unsigned int pool = scrq->pool_index;
1331
1332                 next = ibmvnic_next_scrq(adapter, scrq);
1333                 for (i = 0; i < next->tx_comp.num_comps; i++) {
1334                         if (next->tx_comp.rcs[i]) {
1335                                 dev_err(dev, "tx error %x\n",
1336                                         next->tx_comp.rcs[i]);
1337                                 continue;
1338                         }
1339                         index = be32_to_cpu(next->tx_comp.correlators[i]);
1340                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
1341
1342                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1343                                 if (!txbuff->data_dma[j])
1344                                         continue;
1345
1346                                 txbuff->data_dma[j] = 0;
1347                                 txbuff->used_bounce = false;
1348                         }
1349                         /* if sub_crq was sent indirectly */
1350                         first = txbuff->indir_arr[0].generic.first;
1351                         if (first == IBMVNIC_CRQ_CMD) {
1352                                 dma_unmap_single(dev, txbuff->indir_dma,
1353                                                  sizeof(txbuff->indir_arr),
1354                                                  DMA_TO_DEVICE);
1355                         }
1356
1357                         if (txbuff->last_frag)
1358                                 dev_kfree_skb_any(txbuff->skb);
1359
1360                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1361                                                      producer_index] = index;
1362                         adapter->tx_pool[pool].producer_index =
1363                             (adapter->tx_pool[pool].producer_index + 1) %
1364                             adapter->max_tx_entries_per_subcrq;
1365                 }
1366                 /* remove tx_comp scrq*/
1367                 next->tx_comp.first = 0;
1368         }
1369
1370         enable_scrq_irq(adapter, scrq);
1371
1372         if (pending_scrq(adapter, scrq)) {
1373                 disable_scrq_irq(adapter, scrq);
1374                 goto restart_loop;
1375         }
1376
1377         return 0;
1378 }
1379
1380 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1381 {
1382         struct ibmvnic_sub_crq_queue *scrq = instance;
1383         struct ibmvnic_adapter *adapter = scrq->adapter;
1384
1385         disable_scrq_irq(adapter, scrq);
1386         ibmvnic_complete_tx(adapter, scrq);
1387
1388         return IRQ_HANDLED;
1389 }
1390
1391 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1392 {
1393         struct ibmvnic_sub_crq_queue *scrq = instance;
1394         struct ibmvnic_adapter *adapter = scrq->adapter;
1395
1396         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1397                 disable_scrq_irq(adapter, scrq);
1398                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1399         }
1400
1401         return IRQ_HANDLED;
1402 }
1403
1404 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1405 {
1406         struct device *dev = &adapter->vdev->dev;
1407         struct ibmvnic_sub_crq_queue *scrq;
1408         int i = 0, j = 0;
1409         int rc = 0;
1410
1411         for (i = 0; i < adapter->req_tx_queues; i++) {
1412                 scrq = adapter->tx_scrq[i];
1413                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1414
1415                 if (!scrq->irq) {
1416                         rc = -EINVAL;
1417                         dev_err(dev, "Error mapping irq\n");
1418                         goto req_tx_irq_failed;
1419                 }
1420
1421                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1422                                  0, "ibmvnic_tx", scrq);
1423
1424                 if (rc) {
1425                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1426                                 scrq->irq, rc);
1427                         irq_dispose_mapping(scrq->irq);
1428                         goto req_rx_irq_failed;
1429                 }
1430         }
1431
1432         for (i = 0; i < adapter->req_rx_queues; i++) {
1433                 scrq = adapter->rx_scrq[i];
1434                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1435                 if (!scrq->irq) {
1436                         rc = -EINVAL;
1437                         dev_err(dev, "Error mapping irq\n");
1438                         goto req_rx_irq_failed;
1439                 }
1440                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1441                                  0, "ibmvnic_rx", scrq);
1442                 if (rc) {
1443                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1444                                 scrq->irq, rc);
1445                         irq_dispose_mapping(scrq->irq);
1446                         goto req_rx_irq_failed;
1447                 }
1448         }
1449         return rc;
1450
1451 req_rx_irq_failed:
1452         for (j = 0; j < i; j++) {
1453                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1454                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1455         }
1456         i = adapter->req_tx_queues;
1457 req_tx_irq_failed:
1458         for (j = 0; j < i; j++) {
1459                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1460                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1461         }
1462         release_sub_crqs_no_irqs(adapter);
1463         return rc;
1464 }
1465
1466 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1467 {
1468         struct device *dev = &adapter->vdev->dev;
1469         struct ibmvnic_sub_crq_queue **allqueues;
1470         int registered_queues = 0;
1471         union ibmvnic_crq crq;
1472         int total_queues;
1473         int more = 0;
1474         int i;
1475
1476         if (!retry) {
1477                 /* Sub-CRQ entries are 32 byte long */
1478                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1479
1480                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1481                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
1482                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1483                         goto allqueues_failed;
1484                 }
1485
1486                 /* Get the minimum between the queried max and the entries
1487                  * that fit in our PAGE_SIZE
1488                  */
1489                 adapter->req_tx_entries_per_subcrq =
1490                     adapter->max_tx_entries_per_subcrq > entries_page ?
1491                     entries_page : adapter->max_tx_entries_per_subcrq;
1492                 adapter->req_rx_add_entries_per_subcrq =
1493                     adapter->max_rx_add_entries_per_subcrq > entries_page ?
1494                     entries_page : adapter->max_rx_add_entries_per_subcrq;
1495
1496                 /* Choosing the maximum number of queues supported by firmware*/
1497                 adapter->req_tx_queues = adapter->max_tx_queues;
1498                 adapter->req_rx_queues = adapter->max_rx_queues;
1499                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
1500
1501                 adapter->req_mtu = adapter->max_mtu;
1502         }
1503
1504         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1505
1506         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1507         if (!allqueues)
1508                 goto allqueues_failed;
1509
1510         for (i = 0; i < total_queues; i++) {
1511                 allqueues[i] = init_sub_crq_queue(adapter);
1512                 if (!allqueues[i]) {
1513                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1514                         break;
1515                 }
1516                 registered_queues++;
1517         }
1518
1519         /* Make sure we were able to register the minimum number of queues */
1520         if (registered_queues <
1521             adapter->min_tx_queues + adapter->min_rx_queues) {
1522                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
1523                 goto tx_failed;
1524         }
1525
1526         /* Distribute the failed allocated queues*/
1527         for (i = 0; i < total_queues - registered_queues + more ; i++) {
1528                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1529                 switch (i % 3) {
1530                 case 0:
1531                         if (adapter->req_rx_queues > adapter->min_rx_queues)
1532                                 adapter->req_rx_queues--;
1533                         else
1534                                 more++;
1535                         break;
1536                 case 1:
1537                         if (adapter->req_tx_queues > adapter->min_tx_queues)
1538                                 adapter->req_tx_queues--;
1539                         else
1540                                 more++;
1541                         break;
1542                 }
1543         }
1544
1545         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1546                                    sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1547         if (!adapter->tx_scrq)
1548                 goto tx_failed;
1549
1550         for (i = 0; i < adapter->req_tx_queues; i++) {
1551                 adapter->tx_scrq[i] = allqueues[i];
1552                 adapter->tx_scrq[i]->pool_index = i;
1553         }
1554
1555         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1556                                    sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1557         if (!adapter->rx_scrq)
1558                 goto rx_failed;
1559
1560         for (i = 0; i < adapter->req_rx_queues; i++) {
1561                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1562                 adapter->rx_scrq[i]->scrq_num = i;
1563         }
1564
1565         memset(&crq, 0, sizeof(crq));
1566         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1567         crq.request_capability.cmd = REQUEST_CAPABILITY;
1568
1569         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
1570         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
1571         ibmvnic_send_crq(adapter, &crq);
1572
1573         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
1574         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
1575         ibmvnic_send_crq(adapter, &crq);
1576
1577         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
1578         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
1579         ibmvnic_send_crq(adapter, &crq);
1580
1581         crq.request_capability.capability =
1582             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1583         crq.request_capability.number =
1584             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
1585         ibmvnic_send_crq(adapter, &crq);
1586
1587         crq.request_capability.capability =
1588             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1589         crq.request_capability.number =
1590             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
1591         ibmvnic_send_crq(adapter, &crq);
1592
1593         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
1594         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
1595         ibmvnic_send_crq(adapter, &crq);
1596
1597         if (adapter->netdev->flags & IFF_PROMISC) {
1598                 if (adapter->promisc_supported) {
1599                         crq.request_capability.capability =
1600                             cpu_to_be16(PROMISC_REQUESTED);
1601                         crq.request_capability.number = cpu_to_be64(1);
1602                         ibmvnic_send_crq(adapter, &crq);
1603                 }
1604         } else {
1605                 crq.request_capability.capability =
1606                     cpu_to_be16(PROMISC_REQUESTED);
1607                 crq.request_capability.number = cpu_to_be64(0);
1608                 ibmvnic_send_crq(adapter, &crq);
1609         }
1610
1611         kfree(allqueues);
1612
1613         return;
1614
1615 rx_failed:
1616         kfree(adapter->tx_scrq);
1617         adapter->tx_scrq = NULL;
1618 tx_failed:
1619         for (i = 0; i < registered_queues; i++)
1620                 release_sub_crq_queue(adapter, allqueues[i]);
1621         kfree(allqueues);
1622 allqueues_failed:
1623         ibmvnic_remove(adapter->vdev);
1624 }
1625
1626 static int pending_scrq(struct ibmvnic_adapter *adapter,
1627                         struct ibmvnic_sub_crq_queue *scrq)
1628 {
1629         union sub_crq *entry = &scrq->msgs[scrq->cur];
1630
1631         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1632                 return 1;
1633         else
1634                 return 0;
1635 }
1636
1637 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1638                                         struct ibmvnic_sub_crq_queue *scrq)
1639 {
1640         union sub_crq *entry;
1641         unsigned long flags;
1642
1643         spin_lock_irqsave(&scrq->lock, flags);
1644         entry = &scrq->msgs[scrq->cur];
1645         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1646                 if (++scrq->cur == scrq->size)
1647                         scrq->cur = 0;
1648         } else {
1649                 entry = NULL;
1650         }
1651         spin_unlock_irqrestore(&scrq->lock, flags);
1652
1653         return entry;
1654 }
1655
1656 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1657 {
1658         struct ibmvnic_crq_queue *queue = &adapter->crq;
1659         union ibmvnic_crq *crq;
1660
1661         crq = &queue->msgs[queue->cur];
1662         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1663                 if (++queue->cur == queue->size)
1664                         queue->cur = 0;
1665         } else {
1666                 crq = NULL;
1667         }
1668
1669         return crq;
1670 }
1671
1672 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1673                        union sub_crq *sub_crq)
1674 {
1675         unsigned int ua = adapter->vdev->unit_address;
1676         struct device *dev = &adapter->vdev->dev;
1677         u64 *u64_crq = (u64 *)sub_crq;
1678         int rc;
1679
1680         netdev_dbg(adapter->netdev,
1681                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1682                    (unsigned long int)cpu_to_be64(remote_handle),
1683                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1684                    (unsigned long int)cpu_to_be64(u64_crq[1]),
1685                    (unsigned long int)cpu_to_be64(u64_crq[2]),
1686                    (unsigned long int)cpu_to_be64(u64_crq[3]));
1687
1688         /* Make sure the hypervisor sees the complete request */
1689         mb();
1690
1691         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1692                                 cpu_to_be64(remote_handle),
1693                                 cpu_to_be64(u64_crq[0]),
1694                                 cpu_to_be64(u64_crq[1]),
1695                                 cpu_to_be64(u64_crq[2]),
1696                                 cpu_to_be64(u64_crq[3]));
1697
1698         if (rc) {
1699                 if (rc == H_CLOSED)
1700                         dev_warn(dev, "CRQ Queue closed\n");
1701                 dev_err(dev, "Send error (rc=%d)\n", rc);
1702         }
1703
1704         return rc;
1705 }
1706
1707 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
1708                                 u64 remote_handle, u64 ioba, u64 num_entries)
1709 {
1710         unsigned int ua = adapter->vdev->unit_address;
1711         struct device *dev = &adapter->vdev->dev;
1712         int rc;
1713
1714         /* Make sure the hypervisor sees the complete request */
1715         mb();
1716         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
1717                                 cpu_to_be64(remote_handle),
1718                                 ioba, num_entries);
1719
1720         if (rc) {
1721                 if (rc == H_CLOSED)
1722                         dev_warn(dev, "CRQ Queue closed\n");
1723                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
1724         }
1725
1726         return rc;
1727 }
1728
1729 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1730                             union ibmvnic_crq *crq)
1731 {
1732         unsigned int ua = adapter->vdev->unit_address;
1733         struct device *dev = &adapter->vdev->dev;
1734         u64 *u64_crq = (u64 *)crq;
1735         int rc;
1736
1737         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1738                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1739                    (unsigned long int)cpu_to_be64(u64_crq[1]));
1740
1741         /* Make sure the hypervisor sees the complete request */
1742         mb();
1743
1744         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1745                                 cpu_to_be64(u64_crq[0]),
1746                                 cpu_to_be64(u64_crq[1]));
1747
1748         if (rc) {
1749                 if (rc == H_CLOSED)
1750                         dev_warn(dev, "CRQ Queue closed\n");
1751                 dev_warn(dev, "Send error (rc=%d)\n", rc);
1752         }
1753
1754         return rc;
1755 }
1756
1757 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1758 {
1759         union ibmvnic_crq crq;
1760
1761         memset(&crq, 0, sizeof(crq));
1762         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1763         crq.generic.cmd = IBMVNIC_CRQ_INIT;
1764         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1765
1766         return ibmvnic_send_crq(adapter, &crq);
1767 }
1768
1769 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1770 {
1771         union ibmvnic_crq crq;
1772
1773         memset(&crq, 0, sizeof(crq));
1774         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1775         crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1776         netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1777
1778         return ibmvnic_send_crq(adapter, &crq);
1779 }
1780
1781 static int send_version_xchg(struct ibmvnic_adapter *adapter)
1782 {
1783         union ibmvnic_crq crq;
1784
1785         memset(&crq, 0, sizeof(crq));
1786         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1787         crq.version_exchange.cmd = VERSION_EXCHANGE;
1788         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1789
1790         return ibmvnic_send_crq(adapter, &crq);
1791 }
1792
1793 static void send_login(struct ibmvnic_adapter *adapter)
1794 {
1795         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1796         struct ibmvnic_login_buffer *login_buffer;
1797         struct ibmvnic_inflight_cmd *inflight_cmd;
1798         struct device *dev = &adapter->vdev->dev;
1799         dma_addr_t rsp_buffer_token;
1800         dma_addr_t buffer_token;
1801         size_t rsp_buffer_size;
1802         union ibmvnic_crq crq;
1803         unsigned long flags;
1804         size_t buffer_size;
1805         __be64 *tx_list_p;
1806         __be64 *rx_list_p;
1807         int i;
1808
1809         buffer_size =
1810             sizeof(struct ibmvnic_login_buffer) +
1811             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1812
1813         login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1814         if (!login_buffer)
1815                 goto buf_alloc_failed;
1816
1817         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1818                                       DMA_TO_DEVICE);
1819         if (dma_mapping_error(dev, buffer_token)) {
1820                 dev_err(dev, "Couldn't map login buffer\n");
1821                 goto buf_map_failed;
1822         }
1823
1824         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
1825                           sizeof(u64) * adapter->req_tx_queues +
1826                           sizeof(u64) * adapter->req_rx_queues +
1827                           sizeof(u64) * adapter->req_rx_queues +
1828                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
1829
1830         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1831         if (!login_rsp_buffer)
1832                 goto buf_rsp_alloc_failed;
1833
1834         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1835                                           rsp_buffer_size, DMA_FROM_DEVICE);
1836         if (dma_mapping_error(dev, rsp_buffer_token)) {
1837                 dev_err(dev, "Couldn't map login rsp buffer\n");
1838                 goto buf_rsp_map_failed;
1839         }
1840         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
1841         if (!inflight_cmd) {
1842                 dev_err(dev, "Couldn't allocate inflight_cmd\n");
1843                 goto inflight_alloc_failed;
1844         }
1845         adapter->login_buf = login_buffer;
1846         adapter->login_buf_token = buffer_token;
1847         adapter->login_buf_sz = buffer_size;
1848         adapter->login_rsp_buf = login_rsp_buffer;
1849         adapter->login_rsp_buf_token = rsp_buffer_token;
1850         adapter->login_rsp_buf_sz = rsp_buffer_size;
1851
1852         login_buffer->len = cpu_to_be32(buffer_size);
1853         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
1854         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
1855         login_buffer->off_txcomp_subcrqs =
1856             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
1857         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
1858         login_buffer->off_rxcomp_subcrqs =
1859             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
1860                         sizeof(u64) * adapter->req_tx_queues);
1861         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
1862         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
1863
1864         tx_list_p = (__be64 *)((char *)login_buffer +
1865                                       sizeof(struct ibmvnic_login_buffer));
1866         rx_list_p = (__be64 *)((char *)login_buffer +
1867                                       sizeof(struct ibmvnic_login_buffer) +
1868                                       sizeof(u64) * adapter->req_tx_queues);
1869
1870         for (i = 0; i < adapter->req_tx_queues; i++) {
1871                 if (adapter->tx_scrq[i]) {
1872                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
1873                                                    crq_num);
1874                 }
1875         }
1876
1877         for (i = 0; i < adapter->req_rx_queues; i++) {
1878                 if (adapter->rx_scrq[i]) {
1879                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
1880                                                    crq_num);
1881                 }
1882         }
1883
1884         netdev_dbg(adapter->netdev, "Login Buffer:\n");
1885         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
1886                 netdev_dbg(adapter->netdev, "%016lx\n",
1887                            ((unsigned long int *)(adapter->login_buf))[i]);
1888         }
1889
1890         memset(&crq, 0, sizeof(crq));
1891         crq.login.first = IBMVNIC_CRQ_CMD;
1892         crq.login.cmd = LOGIN;
1893         crq.login.ioba = cpu_to_be32(buffer_token);
1894         crq.login.len = cpu_to_be32(buffer_size);
1895
1896         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
1897
1898         spin_lock_irqsave(&adapter->inflight_lock, flags);
1899         list_add_tail(&inflight_cmd->list, &adapter->inflight);
1900         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
1901
1902         ibmvnic_send_crq(adapter, &crq);
1903
1904         return;
1905
1906 inflight_alloc_failed:
1907         dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
1908                          DMA_FROM_DEVICE);
1909 buf_rsp_map_failed:
1910         kfree(login_rsp_buffer);
1911 buf_rsp_alloc_failed:
1912         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
1913 buf_map_failed:
1914         kfree(login_buffer);
1915 buf_alloc_failed:
1916         return;
1917 }
1918
1919 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
1920                              u32 len, u8 map_id)
1921 {
1922         union ibmvnic_crq crq;
1923
1924         memset(&crq, 0, sizeof(crq));
1925         crq.request_map.first = IBMVNIC_CRQ_CMD;
1926         crq.request_map.cmd = REQUEST_MAP;
1927         crq.request_map.map_id = map_id;
1928         crq.request_map.ioba = cpu_to_be32(addr);
1929         crq.request_map.len = cpu_to_be32(len);
1930         ibmvnic_send_crq(adapter, &crq);
1931 }
1932
1933 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
1934 {
1935         union ibmvnic_crq crq;
1936
1937         memset(&crq, 0, sizeof(crq));
1938         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
1939         crq.request_unmap.cmd = REQUEST_UNMAP;
1940         crq.request_unmap.map_id = map_id;
1941         ibmvnic_send_crq(adapter, &crq);
1942 }
1943
1944 static void send_map_query(struct ibmvnic_adapter *adapter)
1945 {
1946         union ibmvnic_crq crq;
1947
1948         memset(&crq, 0, sizeof(crq));
1949         crq.query_map.first = IBMVNIC_CRQ_CMD;
1950         crq.query_map.cmd = QUERY_MAP;
1951         ibmvnic_send_crq(adapter, &crq);
1952 }
1953
1954 /* Send a series of CRQs requesting various capabilities of the VNIC server */
1955 static void send_cap_queries(struct ibmvnic_adapter *adapter)
1956 {
1957         union ibmvnic_crq crq;
1958
1959         atomic_set(&adapter->running_cap_queries, 0);
1960         memset(&crq, 0, sizeof(crq));
1961         crq.query_capability.first = IBMVNIC_CRQ_CMD;
1962         crq.query_capability.cmd = QUERY_CAPABILITY;
1963
1964         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
1965         atomic_inc(&adapter->running_cap_queries);
1966         ibmvnic_send_crq(adapter, &crq);
1967
1968         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
1969         atomic_inc(&adapter->running_cap_queries);
1970         ibmvnic_send_crq(adapter, &crq);
1971
1972         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
1973         atomic_inc(&adapter->running_cap_queries);
1974         ibmvnic_send_crq(adapter, &crq);
1975
1976         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
1977         atomic_inc(&adapter->running_cap_queries);
1978         ibmvnic_send_crq(adapter, &crq);
1979
1980         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
1981         atomic_inc(&adapter->running_cap_queries);
1982         ibmvnic_send_crq(adapter, &crq);
1983
1984         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
1985         atomic_inc(&adapter->running_cap_queries);
1986         ibmvnic_send_crq(adapter, &crq);
1987
1988         crq.query_capability.capability =
1989             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
1990         atomic_inc(&adapter->running_cap_queries);
1991         ibmvnic_send_crq(adapter, &crq);
1992
1993         crq.query_capability.capability =
1994             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
1995         atomic_inc(&adapter->running_cap_queries);
1996         ibmvnic_send_crq(adapter, &crq);
1997
1998         crq.query_capability.capability =
1999             cpu_to_be16(MAX_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(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2005         atomic_inc(&adapter->running_cap_queries);
2006         ibmvnic_send_crq(adapter, &crq);
2007
2008         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2009         atomic_inc(&adapter->running_cap_queries);
2010         ibmvnic_send_crq(adapter, &crq);
2011
2012         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2013         atomic_inc(&adapter->running_cap_queries);
2014         ibmvnic_send_crq(adapter, &crq);
2015
2016         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2017         atomic_inc(&adapter->running_cap_queries);
2018         ibmvnic_send_crq(adapter, &crq);
2019
2020         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2021         atomic_inc(&adapter->running_cap_queries);
2022         ibmvnic_send_crq(adapter, &crq);
2023
2024         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2025         atomic_inc(&adapter->running_cap_queries);
2026         ibmvnic_send_crq(adapter, &crq);
2027
2028         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2029         atomic_inc(&adapter->running_cap_queries);
2030         ibmvnic_send_crq(adapter, &crq);
2031
2032         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2033         atomic_inc(&adapter->running_cap_queries);
2034         ibmvnic_send_crq(adapter, &crq);
2035
2036         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2037         atomic_inc(&adapter->running_cap_queries);
2038         ibmvnic_send_crq(adapter, &crq);
2039
2040         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2041         atomic_inc(&adapter->running_cap_queries);
2042         ibmvnic_send_crq(adapter, &crq);
2043
2044         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2045         atomic_inc(&adapter->running_cap_queries);
2046         ibmvnic_send_crq(adapter, &crq);
2047
2048         crq.query_capability.capability =
2049                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2050         atomic_inc(&adapter->running_cap_queries);
2051         ibmvnic_send_crq(adapter, &crq);
2052
2053         crq.query_capability.capability =
2054                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2055         atomic_inc(&adapter->running_cap_queries);
2056         ibmvnic_send_crq(adapter, &crq);
2057
2058         crq.query_capability.capability =
2059                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2060         atomic_inc(&adapter->running_cap_queries);
2061         ibmvnic_send_crq(adapter, &crq);
2062
2063         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2064         atomic_inc(&adapter->running_cap_queries);
2065         ibmvnic_send_crq(adapter, &crq);
2066 }
2067
2068 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2069 {
2070         struct device *dev = &adapter->vdev->dev;
2071         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2072         union ibmvnic_crq crq;
2073         int i;
2074
2075         dma_unmap_single(dev, adapter->ip_offload_tok,
2076                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2077
2078         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2079         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2080                 netdev_dbg(adapter->netdev, "%016lx\n",
2081                            ((unsigned long int *)(buf))[i]);
2082
2083         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2084         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2085         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2086                    buf->tcp_ipv4_chksum);
2087         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2088                    buf->tcp_ipv6_chksum);
2089         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2090                    buf->udp_ipv4_chksum);
2091         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2092                    buf->udp_ipv6_chksum);
2093         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2094                    buf->large_tx_ipv4);
2095         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2096                    buf->large_tx_ipv6);
2097         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2098                    buf->large_rx_ipv4);
2099         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2100                    buf->large_rx_ipv6);
2101         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2102                    buf->max_ipv4_header_size);
2103         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2104                    buf->max_ipv6_header_size);
2105         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2106                    buf->max_tcp_header_size);
2107         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2108                    buf->max_udp_header_size);
2109         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2110                    buf->max_large_tx_size);
2111         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2112                    buf->max_large_rx_size);
2113         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2114                    buf->ipv6_extension_header);
2115         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2116                    buf->tcp_pseudosum_req);
2117         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2118                    buf->num_ipv6_ext_headers);
2119         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2120                    buf->off_ipv6_ext_headers);
2121
2122         adapter->ip_offload_ctrl_tok =
2123             dma_map_single(dev, &adapter->ip_offload_ctrl,
2124                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2125
2126         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2127                 dev_err(dev, "Couldn't map ip offload control buffer\n");
2128                 return;
2129         }
2130
2131         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2132         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2133         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2134         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2135         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2136
2137         /* large_tx/rx disabled for now, additional features needed */
2138         adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2139         adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2140         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2141         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2142
2143         adapter->netdev->features = NETIF_F_GSO;
2144
2145         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2146                 adapter->netdev->features |= NETIF_F_IP_CSUM;
2147
2148         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2149                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2150
2151         if ((adapter->netdev->features &
2152             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2153                 adapter->netdev->features |= NETIF_F_RXCSUM;
2154
2155         memset(&crq, 0, sizeof(crq));
2156         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2157         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2158         crq.control_ip_offload.len =
2159             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2160         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2161         ibmvnic_send_crq(adapter, &crq);
2162 }
2163
2164 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2165                                   struct ibmvnic_adapter *adapter)
2166 {
2167         struct device *dev = &adapter->vdev->dev;
2168         struct ibmvnic_error_buff *error_buff, *tmp;
2169         unsigned long flags;
2170         bool found = false;
2171         int i;
2172
2173         if (!crq->request_error_rsp.rc.code) {
2174                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2175                          crq->request_error_rsp.rc.code);
2176                 return;
2177         }
2178
2179         spin_lock_irqsave(&adapter->error_list_lock, flags);
2180         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2181                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2182                         found = true;
2183                         list_del(&error_buff->list);
2184                         break;
2185                 }
2186         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2187
2188         if (!found) {
2189                 dev_err(dev, "Couldn't find error id %x\n",
2190                         crq->request_error_rsp.error_id);
2191                 return;
2192         }
2193
2194         dev_err(dev, "Detailed info for error id %x:",
2195                 crq->request_error_rsp.error_id);
2196
2197         for (i = 0; i < error_buff->len; i++) {
2198                 pr_cont("%02x", (int)error_buff->buff[i]);
2199                 if (i % 8 == 7)
2200                         pr_cont(" ");
2201         }
2202         pr_cont("\n");
2203
2204         dma_unmap_single(dev, error_buff->dma, error_buff->len,
2205                          DMA_FROM_DEVICE);
2206         kfree(error_buff->buff);
2207         kfree(error_buff);
2208 }
2209
2210 static void handle_dump_size_rsp(union ibmvnic_crq *crq,
2211                                  struct ibmvnic_adapter *adapter)
2212 {
2213         int len = be32_to_cpu(crq->request_dump_size_rsp.len);
2214         struct ibmvnic_inflight_cmd *inflight_cmd;
2215         struct device *dev = &adapter->vdev->dev;
2216         union ibmvnic_crq newcrq;
2217         unsigned long flags;
2218
2219         /* allocate and map buffer */
2220         adapter->dump_data = kmalloc(len, GFP_KERNEL);
2221         if (!adapter->dump_data) {
2222                 complete(&adapter->fw_done);
2223                 return;
2224         }
2225
2226         adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len,
2227                                                   DMA_FROM_DEVICE);
2228
2229         if (dma_mapping_error(dev, adapter->dump_data_token)) {
2230                 if (!firmware_has_feature(FW_FEATURE_CMO))
2231                         dev_err(dev, "Couldn't map dump data\n");
2232                 kfree(adapter->dump_data);
2233                 complete(&adapter->fw_done);
2234                 return;
2235         }
2236
2237         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2238         if (!inflight_cmd) {
2239                 dma_unmap_single(dev, adapter->dump_data_token, len,
2240                                  DMA_FROM_DEVICE);
2241                 kfree(adapter->dump_data);
2242                 complete(&adapter->fw_done);
2243                 return;
2244         }
2245
2246         memset(&newcrq, 0, sizeof(newcrq));
2247         newcrq.request_dump.first = IBMVNIC_CRQ_CMD;
2248         newcrq.request_dump.cmd = REQUEST_DUMP;
2249         newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token);
2250         newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size);
2251
2252         memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq));
2253
2254         spin_lock_irqsave(&adapter->inflight_lock, flags);
2255         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2256         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2257
2258         ibmvnic_send_crq(adapter, &newcrq);
2259 }
2260
2261 static void handle_error_indication(union ibmvnic_crq *crq,
2262                                     struct ibmvnic_adapter *adapter)
2263 {
2264         int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2265         struct ibmvnic_inflight_cmd *inflight_cmd;
2266         struct device *dev = &adapter->vdev->dev;
2267         struct ibmvnic_error_buff *error_buff;
2268         union ibmvnic_crq new_crq;
2269         unsigned long flags;
2270
2271         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2272                 crq->error_indication.
2273                     flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2274                 crq->error_indication.error_id,
2275                 crq->error_indication.error_cause);
2276
2277         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2278         if (!error_buff)
2279                 return;
2280
2281         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2282         if (!error_buff->buff) {
2283                 kfree(error_buff);
2284                 return;
2285         }
2286
2287         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2288                                          DMA_FROM_DEVICE);
2289         if (dma_mapping_error(dev, error_buff->dma)) {
2290                 if (!firmware_has_feature(FW_FEATURE_CMO))
2291                         dev_err(dev, "Couldn't map error buffer\n");
2292                 kfree(error_buff->buff);
2293                 kfree(error_buff);
2294                 return;
2295         }
2296
2297         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2298         if (!inflight_cmd) {
2299                 dma_unmap_single(dev, error_buff->dma, detail_len,
2300                                  DMA_FROM_DEVICE);
2301                 kfree(error_buff->buff);
2302                 kfree(error_buff);
2303                 return;
2304         }
2305
2306         error_buff->len = detail_len;
2307         error_buff->error_id = crq->error_indication.error_id;
2308
2309         spin_lock_irqsave(&adapter->error_list_lock, flags);
2310         list_add_tail(&error_buff->list, &adapter->errors);
2311         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2312
2313         memset(&new_crq, 0, sizeof(new_crq));
2314         new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2315         new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2316         new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2317         new_crq.request_error_info.len = cpu_to_be32(detail_len);
2318         new_crq.request_error_info.error_id = crq->error_indication.error_id;
2319
2320         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2321
2322         spin_lock_irqsave(&adapter->inflight_lock, flags);
2323         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2324         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2325
2326         ibmvnic_send_crq(adapter, &new_crq);
2327 }
2328
2329 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2330                                   struct ibmvnic_adapter *adapter)
2331 {
2332         struct net_device *netdev = adapter->netdev;
2333         struct device *dev = &adapter->vdev->dev;
2334         long rc;
2335
2336         rc = crq->change_mac_addr_rsp.rc.code;
2337         if (rc) {
2338                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2339                 return;
2340         }
2341         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2342                ETH_ALEN);
2343 }
2344
2345 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2346                                    struct ibmvnic_adapter *adapter)
2347 {
2348         struct device *dev = &adapter->vdev->dev;
2349         u64 *req_value;
2350         char *name;
2351
2352         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2353         case REQ_TX_QUEUES:
2354                 req_value = &adapter->req_tx_queues;
2355                 name = "tx";
2356                 break;
2357         case REQ_RX_QUEUES:
2358                 req_value = &adapter->req_rx_queues;
2359                 name = "rx";
2360                 break;
2361         case REQ_RX_ADD_QUEUES:
2362                 req_value = &adapter->req_rx_add_queues;
2363                 name = "rx_add";
2364                 break;
2365         case REQ_TX_ENTRIES_PER_SUBCRQ:
2366                 req_value = &adapter->req_tx_entries_per_subcrq;
2367                 name = "tx_entries_per_subcrq";
2368                 break;
2369         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2370                 req_value = &adapter->req_rx_add_entries_per_subcrq;
2371                 name = "rx_add_entries_per_subcrq";
2372                 break;
2373         case REQ_MTU:
2374                 req_value = &adapter->req_mtu;
2375                 name = "mtu";
2376                 break;
2377         case PROMISC_REQUESTED:
2378                 req_value = &adapter->promisc;
2379                 name = "promisc";
2380                 break;
2381         default:
2382                 dev_err(dev, "Got invalid cap request rsp %d\n",
2383                         crq->request_capability.capability);
2384                 return;
2385         }
2386
2387         switch (crq->request_capability_rsp.rc.code) {
2388         case SUCCESS:
2389                 break;
2390         case PARTIALSUCCESS:
2391                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2392                          *req_value,
2393                          (long int)be32_to_cpu(crq->request_capability_rsp.
2394                                                number), name);
2395                 release_sub_crqs_no_irqs(adapter);
2396                 *req_value = be32_to_cpu(crq->request_capability_rsp.number);
2397                 init_sub_crqs(adapter, 1);
2398                 return;
2399         default:
2400                 dev_err(dev, "Error %d in request cap rsp\n",
2401                         crq->request_capability_rsp.rc.code);
2402                 return;
2403         }
2404
2405         /* Done receiving requested capabilities, query IP offload support */
2406         if (++adapter->requested_caps == 7) {
2407                 union ibmvnic_crq newcrq;
2408                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2409                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2410                     &adapter->ip_offload_buf;
2411
2412                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2413                                                          buf_sz,
2414                                                          DMA_FROM_DEVICE);
2415
2416                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2417                         if (!firmware_has_feature(FW_FEATURE_CMO))
2418                                 dev_err(dev, "Couldn't map offload buffer\n");
2419                         return;
2420                 }
2421
2422                 memset(&newcrq, 0, sizeof(newcrq));
2423                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2424                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2425                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2426                 newcrq.query_ip_offload.ioba =
2427                     cpu_to_be32(adapter->ip_offload_tok);
2428
2429                 ibmvnic_send_crq(adapter, &newcrq);
2430         }
2431 }
2432
2433 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2434                             struct ibmvnic_adapter *adapter)
2435 {
2436         struct device *dev = &adapter->vdev->dev;
2437         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2438         struct ibmvnic_login_buffer *login = adapter->login_buf;
2439         union ibmvnic_crq crq;
2440         int i;
2441
2442         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2443                          DMA_BIDIRECTIONAL);
2444         dma_unmap_single(dev, adapter->login_rsp_buf_token,
2445                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2446
2447         /* If the number of queues requested can't be allocated by the
2448          * server, the login response will return with code 1. We will need
2449          * to resend the login buffer with fewer queues requested.
2450          */
2451         if (login_rsp_crq->generic.rc.code) {
2452                 adapter->renegotiate = true;
2453                 complete(&adapter->init_done);
2454                 return 0;
2455         }
2456
2457         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2458         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2459                 netdev_dbg(adapter->netdev, "%016lx\n",
2460                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2461         }
2462
2463         /* Sanity checks */
2464         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2465             (be32_to_cpu(login->num_rxcomp_subcrqs) *
2466              adapter->req_rx_add_queues !=
2467              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2468                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2469                 ibmvnic_remove(adapter->vdev);
2470                 return -EIO;
2471         }
2472         complete(&adapter->init_done);
2473
2474         memset(&crq, 0, sizeof(crq));
2475         crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD;
2476         crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM;
2477         ibmvnic_send_crq(adapter, &crq);
2478
2479         return 0;
2480 }
2481
2482 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2483                                    struct ibmvnic_adapter *adapter)
2484 {
2485         struct device *dev = &adapter->vdev->dev;
2486         u8 map_id = crq->request_map_rsp.map_id;
2487         int tx_subcrqs;
2488         int rx_subcrqs;
2489         long rc;
2490         int i;
2491
2492         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2493         rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2494
2495         rc = crq->request_map_rsp.rc.code;
2496         if (rc) {
2497                 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2498                 adapter->map_id--;
2499                 /* need to find and zero tx/rx_pool map_id */
2500                 for (i = 0; i < tx_subcrqs; i++) {
2501                         if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2502                                 adapter->tx_pool[i].long_term_buff.map_id = 0;
2503                 }
2504                 for (i = 0; i < rx_subcrqs; i++) {
2505                         if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2506                                 adapter->rx_pool[i].long_term_buff.map_id = 0;
2507                 }
2508         }
2509         complete(&adapter->fw_done);
2510 }
2511
2512 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2513                                      struct ibmvnic_adapter *adapter)
2514 {
2515         struct device *dev = &adapter->vdev->dev;
2516         long rc;
2517
2518         rc = crq->request_unmap_rsp.rc.code;
2519         if (rc)
2520                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2521 }
2522
2523 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2524                                  struct ibmvnic_adapter *adapter)
2525 {
2526         struct net_device *netdev = adapter->netdev;
2527         struct device *dev = &adapter->vdev->dev;
2528         long rc;
2529
2530         rc = crq->query_map_rsp.rc.code;
2531         if (rc) {
2532                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2533                 return;
2534         }
2535         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2536                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2537                    crq->query_map_rsp.free_pages);
2538 }
2539
2540 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2541                                  struct ibmvnic_adapter *adapter)
2542 {
2543         struct net_device *netdev = adapter->netdev;
2544         struct device *dev = &adapter->vdev->dev;
2545         long rc;
2546
2547         atomic_dec(&adapter->running_cap_queries);
2548         netdev_dbg(netdev, "Outstanding queries: %d\n",
2549                    atomic_read(&adapter->running_cap_queries));
2550         rc = crq->query_capability.rc.code;
2551         if (rc) {
2552                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2553                 goto out;
2554         }
2555
2556         switch (be16_to_cpu(crq->query_capability.capability)) {
2557         case MIN_TX_QUEUES:
2558                 adapter->min_tx_queues =
2559                     be64_to_cpu(crq->query_capability.number);
2560                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2561                            adapter->min_tx_queues);
2562                 break;
2563         case MIN_RX_QUEUES:
2564                 adapter->min_rx_queues =
2565                     be64_to_cpu(crq->query_capability.number);
2566                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2567                            adapter->min_rx_queues);
2568                 break;
2569         case MIN_RX_ADD_QUEUES:
2570                 adapter->min_rx_add_queues =
2571                     be64_to_cpu(crq->query_capability.number);
2572                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2573                            adapter->min_rx_add_queues);
2574                 break;
2575         case MAX_TX_QUEUES:
2576                 adapter->max_tx_queues =
2577                     be64_to_cpu(crq->query_capability.number);
2578                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2579                            adapter->max_tx_queues);
2580                 break;
2581         case MAX_RX_QUEUES:
2582                 adapter->max_rx_queues =
2583                     be64_to_cpu(crq->query_capability.number);
2584                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2585                            adapter->max_rx_queues);
2586                 break;
2587         case MAX_RX_ADD_QUEUES:
2588                 adapter->max_rx_add_queues =
2589                     be64_to_cpu(crq->query_capability.number);
2590                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2591                            adapter->max_rx_add_queues);
2592                 break;
2593         case MIN_TX_ENTRIES_PER_SUBCRQ:
2594                 adapter->min_tx_entries_per_subcrq =
2595                     be64_to_cpu(crq->query_capability.number);
2596                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2597                            adapter->min_tx_entries_per_subcrq);
2598                 break;
2599         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2600                 adapter->min_rx_add_entries_per_subcrq =
2601                     be64_to_cpu(crq->query_capability.number);
2602                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2603                            adapter->min_rx_add_entries_per_subcrq);
2604                 break;
2605         case MAX_TX_ENTRIES_PER_SUBCRQ:
2606                 adapter->max_tx_entries_per_subcrq =
2607                     be64_to_cpu(crq->query_capability.number);
2608                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2609                            adapter->max_tx_entries_per_subcrq);
2610                 break;
2611         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2612                 adapter->max_rx_add_entries_per_subcrq =
2613                     be64_to_cpu(crq->query_capability.number);
2614                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2615                            adapter->max_rx_add_entries_per_subcrq);
2616                 break;
2617         case TCP_IP_OFFLOAD:
2618                 adapter->tcp_ip_offload =
2619                     be64_to_cpu(crq->query_capability.number);
2620                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2621                            adapter->tcp_ip_offload);
2622                 break;
2623         case PROMISC_SUPPORTED:
2624                 adapter->promisc_supported =
2625                     be64_to_cpu(crq->query_capability.number);
2626                 netdev_dbg(netdev, "promisc_supported = %lld\n",
2627                            adapter->promisc_supported);
2628                 break;
2629         case MIN_MTU:
2630                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
2631                 netdev->min_mtu = adapter->min_mtu;
2632                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2633                 break;
2634         case MAX_MTU:
2635                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
2636                 netdev->max_mtu = adapter->max_mtu;
2637                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2638                 break;
2639         case MAX_MULTICAST_FILTERS:
2640                 adapter->max_multicast_filters =
2641                     be64_to_cpu(crq->query_capability.number);
2642                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2643                            adapter->max_multicast_filters);
2644                 break;
2645         case VLAN_HEADER_INSERTION:
2646                 adapter->vlan_header_insertion =
2647                     be64_to_cpu(crq->query_capability.number);
2648                 if (adapter->vlan_header_insertion)
2649                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2650                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2651                            adapter->vlan_header_insertion);
2652                 break;
2653         case MAX_TX_SG_ENTRIES:
2654                 adapter->max_tx_sg_entries =
2655                     be64_to_cpu(crq->query_capability.number);
2656                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2657                            adapter->max_tx_sg_entries);
2658                 break;
2659         case RX_SG_SUPPORTED:
2660                 adapter->rx_sg_supported =
2661                     be64_to_cpu(crq->query_capability.number);
2662                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2663                            adapter->rx_sg_supported);
2664                 break;
2665         case OPT_TX_COMP_SUB_QUEUES:
2666                 adapter->opt_tx_comp_sub_queues =
2667                     be64_to_cpu(crq->query_capability.number);
2668                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2669                            adapter->opt_tx_comp_sub_queues);
2670                 break;
2671         case OPT_RX_COMP_QUEUES:
2672                 adapter->opt_rx_comp_queues =
2673                     be64_to_cpu(crq->query_capability.number);
2674                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2675                            adapter->opt_rx_comp_queues);
2676                 break;
2677         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2678                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
2679                     be64_to_cpu(crq->query_capability.number);
2680                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2681                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
2682                 break;
2683         case OPT_TX_ENTRIES_PER_SUBCRQ:
2684                 adapter->opt_tx_entries_per_subcrq =
2685                     be64_to_cpu(crq->query_capability.number);
2686                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2687                            adapter->opt_tx_entries_per_subcrq);
2688                 break;
2689         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2690                 adapter->opt_rxba_entries_per_subcrq =
2691                     be64_to_cpu(crq->query_capability.number);
2692                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2693                            adapter->opt_rxba_entries_per_subcrq);
2694                 break;
2695         case TX_RX_DESC_REQ:
2696                 adapter->tx_rx_desc_req = crq->query_capability.number;
2697                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2698                            adapter->tx_rx_desc_req);
2699                 break;
2700
2701         default:
2702                 netdev_err(netdev, "Got invalid cap rsp %d\n",
2703                            crq->query_capability.capability);
2704         }
2705
2706 out:
2707         if (atomic_read(&adapter->running_cap_queries) == 0)
2708                 init_sub_crqs(adapter, 0);
2709                 /* We're done querying the capabilities, initialize sub-crqs */
2710 }
2711
2712 static void handle_control_ras_rsp(union ibmvnic_crq *crq,
2713                                    struct ibmvnic_adapter *adapter)
2714 {
2715         u8 correlator = crq->control_ras_rsp.correlator;
2716         struct device *dev = &adapter->vdev->dev;
2717         bool found = false;
2718         int i;
2719
2720         if (crq->control_ras_rsp.rc.code) {
2721                 dev_warn(dev, "Control ras failed rc=%d\n",
2722                          crq->control_ras_rsp.rc.code);
2723                 return;
2724         }
2725
2726         for (i = 0; i < adapter->ras_comp_num; i++) {
2727                 if (adapter->ras_comps[i].correlator == correlator) {
2728                         found = true;
2729                         break;
2730                 }
2731         }
2732
2733         if (!found) {
2734                 dev_warn(dev, "Correlator not found on control_ras_rsp\n");
2735                 return;
2736         }
2737
2738         switch (crq->control_ras_rsp.op) {
2739         case IBMVNIC_TRACE_LEVEL:
2740                 adapter->ras_comps[i].trace_level = crq->control_ras.level;
2741                 break;
2742         case IBMVNIC_ERROR_LEVEL:
2743                 adapter->ras_comps[i].error_check_level =
2744                     crq->control_ras.level;
2745                 break;
2746         case IBMVNIC_TRACE_PAUSE:
2747                 adapter->ras_comp_int[i].paused = 1;
2748                 break;
2749         case IBMVNIC_TRACE_RESUME:
2750                 adapter->ras_comp_int[i].paused = 0;
2751                 break;
2752         case IBMVNIC_TRACE_ON:
2753                 adapter->ras_comps[i].trace_on = 1;
2754                 break;
2755         case IBMVNIC_TRACE_OFF:
2756                 adapter->ras_comps[i].trace_on = 0;
2757                 break;
2758         case IBMVNIC_CHG_TRACE_BUFF_SZ:
2759                 /* trace_buff_sz is 3 bytes, stuff it into an int */
2760                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0;
2761                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] =
2762                     crq->control_ras_rsp.trace_buff_sz[0];
2763                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] =
2764                     crq->control_ras_rsp.trace_buff_sz[1];
2765                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] =
2766                     crq->control_ras_rsp.trace_buff_sz[2];
2767                 break;
2768         default:
2769                 dev_err(dev, "invalid op %d on control_ras_rsp",
2770                         crq->control_ras_rsp.op);
2771         }
2772 }
2773
2774 static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len,
2775                           loff_t *ppos)
2776 {
2777         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2778         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2779         struct device *dev = &adapter->vdev->dev;
2780         struct ibmvnic_fw_trace_entry *trace;
2781         int num = ras_comp_int->num;
2782         union ibmvnic_crq crq;
2783         dma_addr_t trace_tok;
2784
2785         if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2786                 return 0;
2787
2788         trace =
2789             dma_alloc_coherent(dev,
2790                                be32_to_cpu(adapter->ras_comps[num].
2791                                            trace_buff_size), &trace_tok,
2792                                GFP_KERNEL);
2793         if (!trace) {
2794                 dev_err(dev, "Couldn't alloc trace buffer\n");
2795                 return 0;
2796         }
2797
2798         memset(&crq, 0, sizeof(crq));
2799         crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD;
2800         crq.collect_fw_trace.cmd = COLLECT_FW_TRACE;
2801         crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator;
2802         crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok);
2803         crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size;
2804         ibmvnic_send_crq(adapter, &crq);
2805
2806         init_completion(&adapter->fw_done);
2807         wait_for_completion(&adapter->fw_done);
2808
2809         if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2810                 len =
2811                     be32_to_cpu(adapter->ras_comps[num].trace_buff_size) -
2812                     *ppos;
2813
2814         copy_to_user(user_buf, &((u8 *)trace)[*ppos], len);
2815
2816         dma_free_coherent(dev,
2817                           be32_to_cpu(adapter->ras_comps[num].trace_buff_size),
2818                           trace, trace_tok);
2819         *ppos += len;
2820         return len;
2821 }
2822
2823 static const struct file_operations trace_ops = {
2824         .owner          = THIS_MODULE,
2825         .open           = simple_open,
2826         .read           = trace_read,
2827 };
2828
2829 static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len,
2830                            loff_t *ppos)
2831 {
2832         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2833         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2834         int num = ras_comp_int->num;
2835         char buff[5]; /*  1 or 0 plus \n and \0 */
2836         int size;
2837
2838         size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused);
2839
2840         if (*ppos >= size)
2841                 return 0;
2842
2843         copy_to_user(user_buf, buff, size);
2844         *ppos += size;
2845         return size;
2846 }
2847
2848 static ssize_t paused_write(struct file *file, const char __user *user_buf,
2849                             size_t len, loff_t *ppos)
2850 {
2851         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2852         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2853         int num = ras_comp_int->num;
2854         union ibmvnic_crq crq;
2855         unsigned long val;
2856         char buff[9]; /* decimal max int plus \n and \0 */
2857
2858         copy_from_user(buff, user_buf, sizeof(buff));
2859         val = kstrtoul(buff, 10, NULL);
2860
2861         adapter->ras_comp_int[num].paused = val ? 1 : 0;
2862
2863         memset(&crq, 0, sizeof(crq));
2864         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2865         crq.control_ras.cmd = CONTROL_RAS;
2866         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2867         crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME;
2868         ibmvnic_send_crq(adapter, &crq);
2869
2870         return len;
2871 }
2872
2873 static const struct file_operations paused_ops = {
2874         .owner          = THIS_MODULE,
2875         .open           = simple_open,
2876         .read           = paused_read,
2877         .write          = paused_write,
2878 };
2879
2880 static ssize_t tracing_read(struct file *file, char __user *user_buf,
2881                             size_t len, loff_t *ppos)
2882 {
2883         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2884         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2885         int num = ras_comp_int->num;
2886         char buff[5]; /*  1 or 0 plus \n and \0 */
2887         int size;
2888
2889         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on);
2890
2891         if (*ppos >= size)
2892                 return 0;
2893
2894         copy_to_user(user_buf, buff, size);
2895         *ppos += size;
2896         return size;
2897 }
2898
2899 static ssize_t tracing_write(struct file *file, const char __user *user_buf,
2900                              size_t len, loff_t *ppos)
2901 {
2902         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2903         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2904         int num = ras_comp_int->num;
2905         union ibmvnic_crq crq;
2906         unsigned long val;
2907         char buff[9]; /* decimal max int plus \n and \0 */
2908
2909         copy_from_user(buff, user_buf, sizeof(buff));
2910         val = kstrtoul(buff, 10, NULL);
2911
2912         memset(&crq, 0, sizeof(crq));
2913         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2914         crq.control_ras.cmd = CONTROL_RAS;
2915         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2916         crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF;
2917
2918         return len;
2919 }
2920
2921 static const struct file_operations tracing_ops = {
2922         .owner          = THIS_MODULE,
2923         .open           = simple_open,
2924         .read           = tracing_read,
2925         .write          = tracing_write,
2926 };
2927
2928 static ssize_t error_level_read(struct file *file, char __user *user_buf,
2929                                 size_t len, loff_t *ppos)
2930 {
2931         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2932         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2933         int num = ras_comp_int->num;
2934         char buff[5]; /* decimal max char plus \n and \0 */
2935         int size;
2936
2937         size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level);
2938
2939         if (*ppos >= size)
2940                 return 0;
2941
2942         copy_to_user(user_buf, buff, size);
2943         *ppos += size;
2944         return size;
2945 }
2946
2947 static ssize_t error_level_write(struct file *file, const char __user *user_buf,
2948                                  size_t len, loff_t *ppos)
2949 {
2950         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2951         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2952         int num = ras_comp_int->num;
2953         union ibmvnic_crq crq;
2954         unsigned long val;
2955         char buff[9]; /* decimal max int plus \n and \0 */
2956
2957         copy_from_user(buff, user_buf, sizeof(buff));
2958         val = kstrtoul(buff, 10, NULL);
2959
2960         if (val > 9)
2961                 val = 9;
2962
2963         memset(&crq, 0, sizeof(crq));
2964         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2965         crq.control_ras.cmd = CONTROL_RAS;
2966         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2967         crq.control_ras.op = IBMVNIC_ERROR_LEVEL;
2968         crq.control_ras.level = val;
2969         ibmvnic_send_crq(adapter, &crq);
2970
2971         return len;
2972 }
2973
2974 static const struct file_operations error_level_ops = {
2975         .owner          = THIS_MODULE,
2976         .open           = simple_open,
2977         .read           = error_level_read,
2978         .write          = error_level_write,
2979 };
2980
2981 static ssize_t trace_level_read(struct file *file, char __user *user_buf,
2982                                 size_t len, loff_t *ppos)
2983 {
2984         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2985         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2986         int num = ras_comp_int->num;
2987         char buff[5]; /* decimal max char plus \n and \0 */
2988         int size;
2989
2990         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level);
2991         if (*ppos >= size)
2992                 return 0;
2993
2994         copy_to_user(user_buf, buff, size);
2995         *ppos += size;
2996         return size;
2997 }
2998
2999 static ssize_t trace_level_write(struct file *file, const char __user *user_buf,
3000                                  size_t len, loff_t *ppos)
3001 {
3002         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3003         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3004         union ibmvnic_crq crq;
3005         unsigned long val;
3006         char buff[9]; /* decimal max int plus \n and \0 */
3007
3008         copy_from_user(buff, user_buf, sizeof(buff));
3009         val = kstrtoul(buff, 10, NULL);
3010         if (val > 9)
3011                 val = 9;
3012
3013         memset(&crq, 0, sizeof(crq));
3014         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3015         crq.control_ras.cmd = CONTROL_RAS;
3016         crq.control_ras.correlator =
3017             adapter->ras_comps[ras_comp_int->num].correlator;
3018         crq.control_ras.op = IBMVNIC_TRACE_LEVEL;
3019         crq.control_ras.level = val;
3020         ibmvnic_send_crq(adapter, &crq);
3021
3022         return len;
3023 }
3024
3025 static const struct file_operations trace_level_ops = {
3026         .owner          = THIS_MODULE,
3027         .open           = simple_open,
3028         .read           = trace_level_read,
3029         .write          = trace_level_write,
3030 };
3031
3032 static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf,
3033                                     size_t len, loff_t *ppos)
3034 {
3035         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3036         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3037         int num = ras_comp_int->num;
3038         char buff[9]; /* decimal max int plus \n and \0 */
3039         int size;
3040
3041         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size);
3042         if (*ppos >= size)
3043                 return 0;
3044
3045         copy_to_user(user_buf, buff, size);
3046         *ppos += size;
3047         return size;
3048 }
3049
3050 static ssize_t trace_buff_size_write(struct file *file,
3051                                      const char __user *user_buf, size_t len,
3052                                      loff_t *ppos)
3053 {
3054         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3055         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3056         union ibmvnic_crq crq;
3057         unsigned long val;
3058         char buff[9]; /* decimal max int plus \n and \0 */
3059
3060         copy_from_user(buff, user_buf, sizeof(buff));
3061         val = kstrtoul(buff, 10, NULL);
3062
3063         memset(&crq, 0, sizeof(crq));
3064         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3065         crq.control_ras.cmd = CONTROL_RAS;
3066         crq.control_ras.correlator =
3067             adapter->ras_comps[ras_comp_int->num].correlator;
3068         crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ;
3069         /* trace_buff_sz is 3 bytes, stuff an int into it */
3070         crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5];
3071         crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6];
3072         crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7];
3073         ibmvnic_send_crq(adapter, &crq);
3074
3075         return len;
3076 }
3077
3078 static const struct file_operations trace_size_ops = {
3079         .owner          = THIS_MODULE,
3080         .open           = simple_open,
3081         .read           = trace_buff_size_read,
3082         .write          = trace_buff_size_write,
3083 };
3084
3085 static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq,
3086                                          struct ibmvnic_adapter *adapter)
3087 {
3088         struct device *dev = &adapter->vdev->dev;
3089         struct dentry *dir_ent;
3090         struct dentry *ent;
3091         int i;
3092
3093         debugfs_remove_recursive(adapter->ras_comps_ent);
3094
3095         adapter->ras_comps_ent = debugfs_create_dir("ras_comps",
3096                                                     adapter->debugfs_dir);
3097         if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) {
3098                 dev_info(dev, "debugfs create ras_comps dir failed\n");
3099                 return;
3100         }
3101
3102         for (i = 0; i < adapter->ras_comp_num; i++) {
3103                 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name,
3104                                              adapter->ras_comps_ent);
3105                 if (!dir_ent || IS_ERR(dir_ent)) {
3106                         dev_info(dev, "debugfs create %s dir failed\n",
3107                                  adapter->ras_comps[i].name);
3108                         continue;
3109                 }
3110
3111                 adapter->ras_comp_int[i].adapter = adapter;
3112                 adapter->ras_comp_int[i].num = i;
3113                 adapter->ras_comp_int[i].desc_blob.data =
3114                     &adapter->ras_comps[i].description;
3115                 adapter->ras_comp_int[i].desc_blob.size =
3116                     sizeof(adapter->ras_comps[i].description);
3117
3118                 /* Don't need to remember the dentry's because the debugfs dir
3119                  * gets removed recursively
3120                  */
3121                 ent = debugfs_create_blob("description", S_IRUGO, dir_ent,
3122                                           &adapter->ras_comp_int[i].desc_blob);
3123                 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR,
3124                                           dir_ent, &adapter->ras_comp_int[i],
3125                                           &trace_size_ops);
3126                 ent = debugfs_create_file("trace_level",
3127                                           S_IRUGO |
3128                                           (adapter->ras_comps[i].trace_level !=
3129                                            0xFF  ? S_IWUSR : 0),
3130                                            dir_ent, &adapter->ras_comp_int[i],
3131                                            &trace_level_ops);
3132                 ent = debugfs_create_file("error_level",
3133                                           S_IRUGO |
3134                                           (adapter->
3135                                            ras_comps[i].error_check_level !=
3136                                            0xFF ? S_IWUSR : 0),
3137                                           dir_ent, &adapter->ras_comp_int[i],
3138                                           &trace_level_ops);
3139                 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR,
3140                                           dir_ent, &adapter->ras_comp_int[i],
3141                                           &tracing_ops);
3142                 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR,
3143                                           dir_ent, &adapter->ras_comp_int[i],
3144                                           &paused_ops);
3145                 ent = debugfs_create_file("trace", S_IRUGO, dir_ent,
3146                                           &adapter->ras_comp_int[i],
3147                                           &trace_ops);
3148         }
3149 }
3150
3151 static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq,
3152                                             struct ibmvnic_adapter *adapter)
3153 {
3154         int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component);
3155         struct device *dev = &adapter->vdev->dev;
3156         union ibmvnic_crq newcrq;
3157
3158         adapter->ras_comps = dma_alloc_coherent(dev, len,
3159                                                 &adapter->ras_comps_tok,
3160                                                 GFP_KERNEL);
3161         if (!adapter->ras_comps) {
3162                 if (!firmware_has_feature(FW_FEATURE_CMO))
3163                         dev_err(dev, "Couldn't alloc fw comps buffer\n");
3164                 return;
3165         }
3166
3167         adapter->ras_comp_int = kmalloc(adapter->ras_comp_num *
3168                                         sizeof(struct ibmvnic_fw_comp_internal),
3169                                         GFP_KERNEL);
3170         if (!adapter->ras_comp_int)
3171                 dma_free_coherent(dev, len, adapter->ras_comps,
3172                                   adapter->ras_comps_tok);
3173
3174         memset(&newcrq, 0, sizeof(newcrq));
3175         newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD;
3176         newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS;
3177         newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok);
3178         newcrq.request_ras_comps.len = cpu_to_be32(len);
3179         ibmvnic_send_crq(adapter, &newcrq);
3180 }
3181
3182 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
3183 {
3184         struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1;
3185         struct device *dev = &adapter->vdev->dev;
3186         struct ibmvnic_error_buff *error_buff, *tmp2;
3187         unsigned long flags;
3188         unsigned long flags2;
3189
3190         spin_lock_irqsave(&adapter->inflight_lock, flags);
3191         list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) {
3192                 switch (inflight_cmd->crq.generic.cmd) {
3193                 case LOGIN:
3194                         dma_unmap_single(dev, adapter->login_buf_token,
3195                                          adapter->login_buf_sz,
3196                                          DMA_BIDIRECTIONAL);
3197                         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3198                                          adapter->login_rsp_buf_sz,
3199                                          DMA_BIDIRECTIONAL);
3200                         kfree(adapter->login_rsp_buf);
3201                         kfree(adapter->login_buf);
3202                         break;
3203                 case REQUEST_DUMP:
3204                         complete(&adapter->fw_done);
3205                         break;
3206                 case REQUEST_ERROR_INFO:
3207                         spin_lock_irqsave(&adapter->error_list_lock, flags2);
3208                         list_for_each_entry_safe(error_buff, tmp2,
3209                                                  &adapter->errors, list) {
3210                                 dma_unmap_single(dev, error_buff->dma,
3211                                                  error_buff->len,
3212                                                  DMA_FROM_DEVICE);
3213                                 kfree(error_buff->buff);
3214                                 list_del(&error_buff->list);
3215                                 kfree(error_buff);
3216                         }
3217                         spin_unlock_irqrestore(&adapter->error_list_lock,
3218                                                flags2);
3219                         break;
3220                 }
3221                 list_del(&inflight_cmd->list);
3222                 kfree(inflight_cmd);
3223         }
3224         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
3225 }
3226
3227 static void ibmvnic_xport_event(struct work_struct *work)
3228 {
3229         struct ibmvnic_adapter *adapter = container_of(work,
3230                                                        struct ibmvnic_adapter,
3231                                                        ibmvnic_xport);
3232         struct device *dev = &adapter->vdev->dev;
3233         long rc;
3234
3235         ibmvnic_free_inflight(adapter);
3236         release_sub_crqs(adapter);
3237         if (adapter->migrated) {
3238                 rc = ibmvnic_reenable_crq_queue(adapter);
3239                 if (rc)
3240                         dev_err(dev, "Error after enable rc=%ld\n", rc);
3241                 adapter->migrated = false;
3242                 rc = ibmvnic_send_crq_init(adapter);
3243                 if (rc)
3244                         dev_err(dev, "Error sending init rc=%ld\n", rc);
3245         }
3246 }
3247
3248 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3249                                struct ibmvnic_adapter *adapter)
3250 {
3251         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3252         struct net_device *netdev = adapter->netdev;
3253         struct device *dev = &adapter->vdev->dev;
3254         long rc;
3255
3256         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3257                    ((unsigned long int *)crq)[0],
3258                    ((unsigned long int *)crq)[1]);
3259         switch (gen_crq->first) {
3260         case IBMVNIC_CRQ_INIT_RSP:
3261                 switch (gen_crq->cmd) {
3262                 case IBMVNIC_CRQ_INIT:
3263                         dev_info(dev, "Partner initialized\n");
3264                         /* Send back a response */
3265                         rc = ibmvnic_send_crq_init_complete(adapter);
3266                         if (!rc)
3267                                 schedule_work(&adapter->vnic_crq_init);
3268                         else
3269                                 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
3270                         break;
3271                 case IBMVNIC_CRQ_INIT_COMPLETE:
3272                         dev_info(dev, "Partner initialization complete\n");
3273                         send_version_xchg(adapter);
3274                         break;
3275                 default:
3276                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3277                 }
3278                 return;
3279         case IBMVNIC_CRQ_XPORT_EVENT:
3280                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3281                         dev_info(dev, "Re-enabling adapter\n");
3282                         adapter->migrated = true;
3283                         schedule_work(&adapter->ibmvnic_xport);
3284                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3285                         dev_info(dev, "Backing device failover detected\n");
3286                         netif_carrier_off(netdev);
3287                         adapter->failover = true;
3288                 } else {
3289                         /* The adapter lost the connection */
3290                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3291                                 gen_crq->cmd);
3292                         schedule_work(&adapter->ibmvnic_xport);
3293                 }
3294                 return;
3295         case IBMVNIC_CRQ_CMD_RSP:
3296                 break;
3297         default:
3298                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3299                         gen_crq->first);
3300                 return;
3301         }
3302
3303         switch (gen_crq->cmd) {
3304         case VERSION_EXCHANGE_RSP:
3305                 rc = crq->version_exchange_rsp.rc.code;
3306                 if (rc) {
3307                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3308                         break;
3309                 }
3310                 dev_info(dev, "Partner protocol version is %d\n",
3311                          crq->version_exchange_rsp.version);
3312                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3313                     ibmvnic_version)
3314                         ibmvnic_version =
3315                             be16_to_cpu(crq->version_exchange_rsp.version);
3316                 send_cap_queries(adapter);
3317                 break;
3318         case QUERY_CAPABILITY_RSP:
3319                 handle_query_cap_rsp(crq, adapter);
3320                 break;
3321         case QUERY_MAP_RSP:
3322                 handle_query_map_rsp(crq, adapter);
3323                 break;
3324         case REQUEST_MAP_RSP:
3325                 handle_request_map_rsp(crq, adapter);
3326                 break;
3327         case REQUEST_UNMAP_RSP:
3328                 handle_request_unmap_rsp(crq, adapter);
3329                 break;
3330         case REQUEST_CAPABILITY_RSP:
3331                 handle_request_cap_rsp(crq, adapter);
3332                 break;
3333         case LOGIN_RSP:
3334                 netdev_dbg(netdev, "Got Login Response\n");
3335                 handle_login_rsp(crq, adapter);
3336                 break;
3337         case LOGICAL_LINK_STATE_RSP:
3338                 netdev_dbg(netdev, "Got Logical Link State Response\n");
3339                 adapter->logical_link_state =
3340                     crq->logical_link_state_rsp.link_state;
3341                 break;
3342         case LINK_STATE_INDICATION:
3343                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3344                 adapter->phys_link_state =
3345                     crq->link_state_indication.phys_link_state;
3346                 adapter->logical_link_state =
3347                     crq->link_state_indication.logical_link_state;
3348                 break;
3349         case CHANGE_MAC_ADDR_RSP:
3350                 netdev_dbg(netdev, "Got MAC address change Response\n");
3351                 handle_change_mac_rsp(crq, adapter);
3352                 break;
3353         case ERROR_INDICATION:
3354                 netdev_dbg(netdev, "Got Error Indication\n");
3355                 handle_error_indication(crq, adapter);
3356                 break;
3357         case REQUEST_ERROR_RSP:
3358                 netdev_dbg(netdev, "Got Error Detail Response\n");
3359                 handle_error_info_rsp(crq, adapter);
3360                 break;
3361         case REQUEST_STATISTICS_RSP:
3362                 netdev_dbg(netdev, "Got Statistics Response\n");
3363                 complete(&adapter->stats_done);
3364                 break;
3365         case REQUEST_DUMP_SIZE_RSP:
3366                 netdev_dbg(netdev, "Got Request Dump Size Response\n");
3367                 handle_dump_size_rsp(crq, adapter);
3368                 break;
3369         case REQUEST_DUMP_RSP:
3370                 netdev_dbg(netdev, "Got Request Dump Response\n");
3371                 complete(&adapter->fw_done);
3372                 break;
3373         case QUERY_IP_OFFLOAD_RSP:
3374                 netdev_dbg(netdev, "Got Query IP offload Response\n");
3375                 handle_query_ip_offload_rsp(adapter);
3376                 break;
3377         case MULTICAST_CTRL_RSP:
3378                 netdev_dbg(netdev, "Got multicast control Response\n");
3379                 break;
3380         case CONTROL_IP_OFFLOAD_RSP:
3381                 netdev_dbg(netdev, "Got Control IP offload Response\n");
3382                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3383                                  sizeof(adapter->ip_offload_ctrl),
3384                                  DMA_TO_DEVICE);
3385                 /* We're done with the queries, perform the login */
3386                 send_login(adapter);
3387                 break;
3388         case REQUEST_RAS_COMP_NUM_RSP:
3389                 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n");
3390                 if (crq->request_ras_comp_num_rsp.rc.code == 10) {
3391                         netdev_dbg(netdev, "Request RAS Comp Num not supported\n");
3392                         break;
3393                 }
3394                 adapter->ras_comp_num =
3395                     be32_to_cpu(crq->request_ras_comp_num_rsp.num_components);
3396                 handle_request_ras_comp_num_rsp(crq, adapter);
3397                 break;
3398         case REQUEST_RAS_COMPS_RSP:
3399                 netdev_dbg(netdev, "Got Request RAS Comps Response\n");
3400                 handle_request_ras_comps_rsp(crq, adapter);
3401                 break;
3402         case CONTROL_RAS_RSP:
3403                 netdev_dbg(netdev, "Got Control RAS Response\n");
3404                 handle_control_ras_rsp(crq, adapter);
3405                 break;
3406         case COLLECT_FW_TRACE_RSP:
3407                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3408                 complete(&adapter->fw_done);
3409                 break;
3410         default:
3411                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3412                            gen_crq->cmd);
3413         }
3414 }
3415
3416 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3417 {
3418         struct ibmvnic_adapter *adapter = instance;
3419         struct ibmvnic_crq_queue *queue = &adapter->crq;
3420         struct vio_dev *vdev = adapter->vdev;
3421         union ibmvnic_crq *crq;
3422         unsigned long flags;
3423         bool done = false;
3424
3425         spin_lock_irqsave(&queue->lock, flags);
3426         vio_disable_interrupts(vdev);
3427         while (!done) {
3428                 /* Pull all the valid messages off the CRQ */
3429                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3430                         ibmvnic_handle_crq(crq, adapter);
3431                         crq->generic.first = 0;
3432                 }
3433                 vio_enable_interrupts(vdev);
3434                 crq = ibmvnic_next_crq(adapter);
3435                 if (crq) {
3436                         vio_disable_interrupts(vdev);
3437                         ibmvnic_handle_crq(crq, adapter);
3438                         crq->generic.first = 0;
3439                 } else {
3440                         done = true;
3441                 }
3442         }
3443         spin_unlock_irqrestore(&queue->lock, flags);
3444         return IRQ_HANDLED;
3445 }
3446
3447 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3448 {
3449         struct vio_dev *vdev = adapter->vdev;
3450         int rc;
3451
3452         do {
3453                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3454         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3455
3456         if (rc)
3457                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3458
3459         return rc;
3460 }
3461
3462 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3463 {
3464         struct ibmvnic_crq_queue *crq = &adapter->crq;
3465         struct device *dev = &adapter->vdev->dev;
3466         struct vio_dev *vdev = adapter->vdev;
3467         int rc;
3468
3469         /* Close the CRQ */
3470         do {
3471                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3472         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3473
3474         /* Clean out the queue */
3475         memset(crq->msgs, 0, PAGE_SIZE);
3476         crq->cur = 0;
3477
3478         /* And re-open it again */
3479         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3480                                 crq->msg_token, PAGE_SIZE);
3481
3482         if (rc == H_CLOSED)
3483                 /* Adapter is good, but other end is not ready */
3484                 dev_warn(dev, "Partner adapter not ready\n");
3485         else if (rc != 0)
3486                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3487
3488         return rc;
3489 }
3490
3491 static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter)
3492 {
3493         struct ibmvnic_crq_queue *crq = &adapter->crq;
3494         struct vio_dev *vdev = adapter->vdev;
3495         long rc;
3496
3497         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3498         free_irq(vdev->irq, adapter);
3499         do {
3500                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3501         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3502
3503         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3504                          DMA_BIDIRECTIONAL);
3505         free_page((unsigned long)crq->msgs);
3506 }
3507
3508 static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter)
3509 {
3510         struct ibmvnic_crq_queue *crq = &adapter->crq;
3511         struct device *dev = &adapter->vdev->dev;
3512         struct vio_dev *vdev = adapter->vdev;
3513         int rc, retrc = -ENOMEM;
3514
3515         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3516         /* Should we allocate more than one page? */
3517
3518         if (!crq->msgs)
3519                 return -ENOMEM;
3520
3521         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3522         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3523                                         DMA_BIDIRECTIONAL);
3524         if (dma_mapping_error(dev, crq->msg_token))
3525                 goto map_failed;
3526
3527         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3528                                 crq->msg_token, PAGE_SIZE);
3529
3530         if (rc == H_RESOURCE)
3531                 /* maybe kexecing and resource is busy. try a reset */
3532                 rc = ibmvnic_reset_crq(adapter);
3533         retrc = rc;
3534
3535         if (rc == H_CLOSED) {
3536                 dev_warn(dev, "Partner adapter not ready\n");
3537         } else if (rc) {
3538                 dev_warn(dev, "Error %d opening adapter\n", rc);
3539                 goto reg_crq_failed;
3540         }
3541
3542         retrc = 0;
3543
3544         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3545         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3546                          adapter);
3547         if (rc) {
3548                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3549                         vdev->irq, rc);
3550                 goto req_irq_failed;
3551         }
3552
3553         rc = vio_enable_interrupts(vdev);
3554         if (rc) {
3555                 dev_err(dev, "Error %d enabling interrupts\n", rc);
3556                 goto req_irq_failed;
3557         }
3558
3559         crq->cur = 0;
3560         spin_lock_init(&crq->lock);
3561
3562         return retrc;
3563
3564 req_irq_failed:
3565         do {
3566                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3567         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3568 reg_crq_failed:
3569         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3570 map_failed:
3571         free_page((unsigned long)crq->msgs);
3572         return retrc;
3573 }
3574
3575 /* debugfs for dump */
3576 static int ibmvnic_dump_show(struct seq_file *seq, void *v)
3577 {
3578         struct net_device *netdev = seq->private;
3579         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3580         struct device *dev = &adapter->vdev->dev;
3581         union ibmvnic_crq crq;
3582
3583         memset(&crq, 0, sizeof(crq));
3584         crq.request_dump_size.first = IBMVNIC_CRQ_CMD;
3585         crq.request_dump_size.cmd = REQUEST_DUMP_SIZE;
3586         ibmvnic_send_crq(adapter, &crq);
3587
3588         init_completion(&adapter->fw_done);
3589         wait_for_completion(&adapter->fw_done);
3590
3591         seq_write(seq, adapter->dump_data, adapter->dump_data_size);
3592
3593         dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size,
3594                          DMA_BIDIRECTIONAL);
3595
3596         kfree(adapter->dump_data);
3597
3598         return 0;
3599 }
3600
3601 static int ibmvnic_dump_open(struct inode *inode, struct file *file)
3602 {
3603         return single_open(file, ibmvnic_dump_show, inode->i_private);
3604 }
3605
3606 static const struct file_operations ibmvnic_dump_ops = {
3607         .owner          = THIS_MODULE,
3608         .open           = ibmvnic_dump_open,
3609         .read           = seq_read,
3610         .llseek         = seq_lseek,
3611         .release        = single_release,
3612 };
3613
3614 static void handle_crq_init_rsp(struct work_struct *work)
3615 {
3616         struct ibmvnic_adapter *adapter = container_of(work,
3617                                                        struct ibmvnic_adapter,
3618                                                        vnic_crq_init);
3619         struct device *dev = &adapter->vdev->dev;
3620         struct net_device *netdev = adapter->netdev;
3621         unsigned long timeout = msecs_to_jiffies(30000);
3622         bool restart = false;
3623         int rc;
3624
3625         if (adapter->failover) {
3626                 release_sub_crqs(adapter);
3627                 if (netif_running(netdev)) {
3628                         netif_tx_disable(netdev);
3629                         ibmvnic_close(netdev);
3630                         restart = true;
3631                 }
3632         }
3633
3634         send_version_xchg(adapter);
3635         reinit_completion(&adapter->init_done);
3636         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3637                 dev_err(dev, "Passive init timeout\n");
3638                 goto task_failed;
3639         }
3640
3641         do {
3642                 if (adapter->renegotiate) {
3643                         adapter->renegotiate = false;
3644                         release_sub_crqs_no_irqs(adapter);
3645                         send_cap_queries(adapter);
3646
3647                         reinit_completion(&adapter->init_done);
3648                         if (!wait_for_completion_timeout(&adapter->init_done,
3649                                                          timeout)) {
3650                                 dev_err(dev, "Passive init timeout\n");
3651                                 goto task_failed;
3652                         }
3653                 }
3654         } while (adapter->renegotiate);
3655         rc = init_sub_crq_irqs(adapter);
3656
3657         if (rc)
3658                 goto task_failed;
3659
3660         netdev->real_num_tx_queues = adapter->req_tx_queues;
3661         netdev->mtu = adapter->req_mtu;
3662         netdev->min_mtu = adapter->min_mtu;
3663         netdev->max_mtu = adapter->max_mtu;
3664
3665         if (adapter->failover) {
3666                 adapter->failover = false;
3667                 if (restart) {
3668                         rc = ibmvnic_open(netdev);
3669                         if (rc)
3670                                 goto restart_failed;
3671                 }
3672                 netif_carrier_on(netdev);
3673                 return;
3674         }
3675
3676         rc = register_netdev(netdev);
3677         if (rc) {
3678                 dev_err(dev,
3679                         "failed to register netdev rc=%d\n", rc);
3680                 goto register_failed;
3681         }
3682         dev_info(dev, "ibmvnic registered\n");
3683
3684         return;
3685
3686 restart_failed:
3687         dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc);
3688 register_failed:
3689         release_sub_crqs(adapter);
3690 task_failed:
3691         dev_err(dev, "Passive initialization was not successful\n");
3692 }
3693
3694 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3695 {
3696         unsigned long timeout = msecs_to_jiffies(30000);
3697         struct ibmvnic_adapter *adapter;
3698         struct net_device *netdev;
3699         unsigned char *mac_addr_p;
3700         struct dentry *ent;
3701         char buf[16]; /* debugfs name buf */
3702         int rc;
3703
3704         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3705                 dev->unit_address);
3706
3707         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3708                                                         VETH_MAC_ADDR, NULL);
3709         if (!mac_addr_p) {
3710                 dev_err(&dev->dev,
3711                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3712                         __FILE__, __LINE__);
3713                 return 0;
3714         }
3715
3716         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3717                                    IBMVNIC_MAX_TX_QUEUES);
3718         if (!netdev)
3719                 return -ENOMEM;
3720
3721         adapter = netdev_priv(netdev);
3722         dev_set_drvdata(&dev->dev, netdev);
3723         adapter->vdev = dev;
3724         adapter->netdev = netdev;
3725         adapter->failover = false;
3726
3727         ether_addr_copy(adapter->mac_addr, mac_addr_p);
3728         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3729         netdev->irq = dev->irq;
3730         netdev->netdev_ops = &ibmvnic_netdev_ops;
3731         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3732         SET_NETDEV_DEV(netdev, &dev->dev);
3733
3734         INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp);
3735         INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event);
3736
3737         spin_lock_init(&adapter->stats_lock);
3738
3739         rc = ibmvnic_init_crq_queue(adapter);
3740         if (rc) {
3741                 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc);
3742                 goto free_netdev;
3743         }
3744
3745         INIT_LIST_HEAD(&adapter->errors);
3746         INIT_LIST_HEAD(&adapter->inflight);
3747         spin_lock_init(&adapter->error_list_lock);
3748         spin_lock_init(&adapter->inflight_lock);
3749
3750         adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats,
3751                                               sizeof(struct ibmvnic_statistics),
3752                                               DMA_FROM_DEVICE);
3753         if (dma_mapping_error(&dev->dev, adapter->stats_token)) {
3754                 if (!firmware_has_feature(FW_FEATURE_CMO))
3755                         dev_err(&dev->dev, "Couldn't map stats buffer\n");
3756                 rc = -ENOMEM;
3757                 goto free_crq;
3758         }
3759
3760         snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address);
3761         ent = debugfs_create_dir(buf, NULL);
3762         if (!ent || IS_ERR(ent)) {
3763                 dev_info(&dev->dev, "debugfs create directory failed\n");
3764                 adapter->debugfs_dir = NULL;
3765         } else {
3766                 adapter->debugfs_dir = ent;
3767                 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir,
3768                                           netdev, &ibmvnic_dump_ops);
3769                 if (!ent || IS_ERR(ent)) {
3770                         dev_info(&dev->dev,
3771                                  "debugfs create dump file failed\n");
3772                         adapter->debugfs_dump = NULL;
3773                 } else {
3774                         adapter->debugfs_dump = ent;
3775                 }
3776         }
3777         ibmvnic_send_crq_init(adapter);
3778
3779         init_completion(&adapter->init_done);
3780         if (!wait_for_completion_timeout(&adapter->init_done, timeout))
3781                 return 0;
3782
3783         do {
3784                 if (adapter->renegotiate) {
3785                         adapter->renegotiate = false;
3786                         release_sub_crqs_no_irqs(adapter);
3787                         send_cap_queries(adapter);
3788
3789                         reinit_completion(&adapter->init_done);
3790                         if (!wait_for_completion_timeout(&adapter->init_done,
3791                                                          timeout))
3792                                 return 0;
3793                 }
3794         } while (adapter->renegotiate);
3795
3796         rc = init_sub_crq_irqs(adapter);
3797         if (rc) {
3798                 dev_err(&dev->dev, "failed to initialize sub crq irqs\n");
3799                 goto free_debugfs;
3800         }
3801
3802         netdev->real_num_tx_queues = adapter->req_tx_queues;
3803         netdev->mtu = adapter->req_mtu;
3804
3805         rc = register_netdev(netdev);
3806         if (rc) {
3807                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3808                 goto free_sub_crqs;
3809         }
3810         dev_info(&dev->dev, "ibmvnic registered\n");
3811
3812         return 0;
3813
3814 free_sub_crqs:
3815         release_sub_crqs(adapter);
3816 free_debugfs:
3817         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3818                 debugfs_remove_recursive(adapter->debugfs_dir);
3819 free_crq:
3820         ibmvnic_release_crq_queue(adapter);
3821 free_netdev:
3822         free_netdev(netdev);
3823         return rc;
3824 }
3825
3826 static int ibmvnic_remove(struct vio_dev *dev)
3827 {
3828         struct net_device *netdev = dev_get_drvdata(&dev->dev);
3829         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3830
3831         unregister_netdev(netdev);
3832
3833         release_sub_crqs(adapter);
3834
3835         ibmvnic_release_crq_queue(adapter);
3836
3837         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3838                 debugfs_remove_recursive(adapter->debugfs_dir);
3839
3840         if (adapter->ras_comps)
3841                 dma_free_coherent(&dev->dev,
3842                                   adapter->ras_comp_num *
3843                                   sizeof(struct ibmvnic_fw_component),
3844                                   adapter->ras_comps, adapter->ras_comps_tok);
3845
3846         kfree(adapter->ras_comp_int);
3847
3848         free_netdev(netdev);
3849         dev_set_drvdata(&dev->dev, NULL);
3850
3851         return 0;
3852 }
3853
3854 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3855 {
3856         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3857         struct ibmvnic_adapter *adapter;
3858         struct iommu_table *tbl;
3859         unsigned long ret = 0;
3860         int i;
3861
3862         tbl = get_iommu_table_base(&vdev->dev);
3863
3864         /* netdev inits at probe time along with the structures we need below*/
3865         if (!netdev)
3866                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3867
3868         adapter = netdev_priv(netdev);
3869
3870         ret += PAGE_SIZE; /* the crq message queue */
3871         ret += adapter->bounce_buffer_size;
3872         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3873
3874         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3875                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3876
3877         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3878              i++)
3879                 ret += adapter->rx_pool[i].size *
3880                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3881
3882         return ret;
3883 }
3884
3885 static int ibmvnic_resume(struct device *dev)
3886 {
3887         struct net_device *netdev = dev_get_drvdata(dev);
3888         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3889         int i;
3890
3891         /* kick the interrupt handlers just in case we lost an interrupt */
3892         for (i = 0; i < adapter->req_rx_queues; i++)
3893                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3894                                      adapter->rx_scrq[i]);
3895
3896         return 0;
3897 }
3898
3899 static struct vio_device_id ibmvnic_device_table[] = {
3900         {"network", "IBM,vnic"},
3901         {"", "" }
3902 };
3903 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3904
3905 static const struct dev_pm_ops ibmvnic_pm_ops = {
3906         .resume = ibmvnic_resume
3907 };
3908
3909 static struct vio_driver ibmvnic_driver = {
3910         .id_table       = ibmvnic_device_table,
3911         .probe          = ibmvnic_probe,
3912         .remove         = ibmvnic_remove,
3913         .get_desired_dma = ibmvnic_get_desired_dma,
3914         .name           = ibmvnic_driver_name,
3915         .pm             = &ibmvnic_pm_ops,
3916 };
3917
3918 /* module functions */
3919 static int __init ibmvnic_module_init(void)
3920 {
3921         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3922                 IBMVNIC_DRIVER_VERSION);
3923
3924         return vio_register_driver(&ibmvnic_driver);
3925 }
3926
3927 static void __exit ibmvnic_module_exit(void)
3928 {
3929         vio_unregister_driver(&ibmvnic_driver);
3930 }
3931
3932 module_init(ibmvnic_module_init);
3933 module_exit(ibmvnic_module_exit);