drivers/net/ethernet/ibm/ibmvnic.c

   1 /**************************************************************************/
   2 /*                                                                        */
   3 /*  IBM System i and System p Virtual NIC Device Driver                   */
   4 /*  Copyright (C) 2014 IBM Corp.                                          */
   5 /*  Santiago Leon (santi_leon@yahoo.com)                                  */
   6 /*  Thomas Falcon (tlfalcon@linux.vnet.ibm.com)                           */
   7 /*  John Allen (jallen@linux.vnet.ibm.com)                                */
   8 /*                                                                        */
   9 /*  This program is free software; you can redistribute it and/or modify  */
  10 /*  it under the terms of the GNU General Public License as published by  */
  11 /*  the Free Software Foundation; either version 2 of the License, or     */
  12 /*  (at your option) any later version.                                   */
  13 /*                                                                        */
  14 /*  This program is distributed in the hope that it will be useful,       */
  15 /*  but WITHOUT ANY WARRANTY; without even the implied warranty of        */
  16 /*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         */
  17 /*  GNU General Public License for more details.                          */
  18 /*                                                                        */
  19 /*  You should have received a copy of the GNU General Public License     */
  20 /*  along with this program.                                              */
  21 /*                                                                        */
  22 /* This module contains the implementation of a virtual ethernet device   */
  23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN    */
  24 /* option of the RS/6000 Platform Architecture to interface with virtual  */
  25 /* ethernet NICs that are presented to the partition by the hypervisor.   */
  26 /*                                                                         */
  27 /* Messages are passed between the VNIC driver and the VNIC server using  */
  28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to  */
  29 /* issue and receive commands that initiate communication with the server */
  30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but    */
  31 /* are used by the driver to notify the server that a packet is           */
  32 /* ready for transmission or that a buffer has been added to receive a    */
  33 /* packet. Subsequently, sCRQs are used by the server to notify the       */
  34 /* driver that a packet transmission has been completed or that a packet  */
  35 /* has been received and placed in a waiting buffer.                      */
  36 /*                                                                        */
  37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in    */
  38 /* which skbs are DMA mapped and immediately unmapped when the transmit   */
  39 /* or receive has been completed, the VNIC driver is required to use      */
  40 /* "long term mapping". This entails that large, continuous DMA mapped    */
  41 /* buffers are allocated on driver initialization and these buffers are   */
  42 /* then continuously reused to pass skbs to and from the VNIC server.     */
  43 /*                                                                        */
  44 /**************************************************************************/
  45
  46 #include <linux/module.h>
  47 #include <linux/moduleparam.h>
  48 #include <linux/types.h>
  49 #include <linux/errno.h>
  50 #include <linux/completion.h>
  51 #include <linux/ioport.h>
  52 #include <linux/dma-mapping.h>
  53 #include <linux/kernel.h>
  54 #include <linux/netdevice.h>
  55 #include <linux/etherdevice.h>
  56 #include <linux/skbuff.h>
  57 #include <linux/init.h>
  58 #include <linux/delay.h>
  59 #include <linux/mm.h>
  60 #include <linux/ethtool.h>
  61 #include <linux/proc_fs.h>
  62 #include <linux/in.h>
  63 #include <linux/ip.h>
  64 #include <linux/ipv6.h>
  65 #include <linux/irq.h>
  66 #include <linux/kthread.h>
  67 #include <linux/seq_file.h>
  68 #include <linux/debugfs.h>
  69 #include <linux/interrupt.h>
  70 #include <net/net_namespace.h>
  71 #include <asm/hvcall.h>
  72 #include <linux/atomic.h>
  73 #include <asm/vio.h>
  74 #include <asm/iommu.h>
  75 #include <linux/uaccess.h>
  76 #include <asm/firmware.h>
  77 #include <linux/workqueue.h>
  78
  79 #include "ibmvnic.h"
  80
  81 static const char ibmvnic_driver_name[] = "ibmvnic";
  82 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  83
  84 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
  85 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  86 MODULE_LICENSE("GPL");
  87 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  88
  89 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  90 static int ibmvnic_remove(struct vio_dev *);
  91 static void release_sub_crqs(struct ibmvnic_adapter *);
  92 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *);
  93 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  94 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  95 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  96 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  97 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  98                        union sub_crq *sub_crq);
  99 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
 100 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
 101 static int enable_scrq_irq(struct ibmvnic_adapter *,
 102                            struct ibmvnic_sub_crq_queue *);
 103 static int disable_scrq_irq(struct ibmvnic_adapter *,
 104                             struct ibmvnic_sub_crq_queue *);
 105 static int pending_scrq(struct ibmvnic_adapter *,
 106                         struct ibmvnic_sub_crq_queue *);
 107 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
 108                                         struct ibmvnic_sub_crq_queue *);
 109 static int ibmvnic_poll(struct napi_struct *napi, int data);
 110 static void send_map_query(struct ibmvnic_adapter *adapter);
 111 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 112 static void send_request_unmap(struct ibmvnic_adapter *, u8);
 113
 114 struct ibmvnic_stat {
 115         char name[ETH_GSTRING_LEN];
 116         int offset;
 117 };
 118
 119 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 120                              offsetof(struct ibmvnic_statistics, stat))
 121 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 122
 123 static const struct ibmvnic_stat ibmvnic_stats[] = {
 124         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 125         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 126         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 127         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 128         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 129         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 130         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 131         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 132         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 133         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 134         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 135         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 136         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 137         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 138         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 139         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 140         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 141         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 142         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 143         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 144         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 145         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 146 };
 147
 148 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 149                           unsigned long length, unsigned long *number,
 150                           unsigned long *irq)
 151 {
 152         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 153         long rc;
 154
 155         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 156         *number = retbuf[0];
 157         *irq = retbuf[1];
 158
 159         return rc;
 160 }
 161
 162 /* net_device_ops functions */
 163
 164 static void init_rx_pool(struct ibmvnic_adapter *adapter,
 165                          struct ibmvnic_rx_pool *rx_pool, int num, int index,
 166                          int buff_size, int active)
 167 {
 168         netdev_dbg(adapter->netdev,
 169                    "Initializing rx_pool %d, %d buffs, %d bytes each\n",
 170                    index, num, buff_size);
 171         rx_pool->size = num;
 172         rx_pool->index = index;
 173         rx_pool->buff_size = buff_size;
 174         rx_pool->active = active;
 175 }
 176
 177 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 178                                 struct ibmvnic_long_term_buff *ltb, int size)
 179 {
 180         struct device *dev = &adapter->vdev->dev;
 181
 182         ltb->size = size;
 183         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 184                                        GFP_KERNEL);
 185
 186         if (!ltb->buff) {
 187                 dev_err(dev, "Couldn't alloc long term buffer\n");
 188                 return -ENOMEM;
 189         }
 190         ltb->map_id = adapter->map_id;
 191         adapter->map_id++;
 192
 193         init_completion(&adapter->fw_done);
 194         send_request_map(adapter, ltb->addr,
 195                          ltb->size, ltb->map_id);
 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                              adapter->req_rx_add_entries_per_subcrq, 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->req_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->req_tx_entries_per_subcrq *
 429                                          adapter->req_mtu))
 430                         goto tx_ltb_alloc_failed;
 431
 432                 tx_pool->free_map =
 433                     kcalloc(adapter->req_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->req_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_disable(&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_sub_crq_queue *tx_scrq;
 709         struct ibmvnic_tx_pool *tx_pool;
 710         unsigned int tx_send_failed = 0;
 711         unsigned int tx_map_failed = 0;
 712         unsigned int tx_dropped = 0;
 713         unsigned int tx_packets = 0;
 714         unsigned int tx_bytes = 0;
 715         dma_addr_t data_dma_addr;
 716         struct netdev_queue *txq;
 717         bool used_bounce = false;
 718         unsigned long lpar_rc;
 719         union sub_crq tx_crq;
 720         unsigned int offset;
 721         int num_entries = 1;
 722         unsigned char *dst;
 723         u64 *handle_array;
 724         int index = 0;
 725         int ret = 0;
 726
 727         tx_pool = &adapter->tx_pool[queue_num];
 728         tx_scrq = adapter->tx_scrq[queue_num];
 729         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
 730         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 731                                    be32_to_cpu(adapter->login_rsp_buf->
 732                                                off_txsubm_subcrqs));
 733         if (adapter->migrated) {
 734                 tx_send_failed++;
 735                 tx_dropped++;
 736                 ret = NETDEV_TX_BUSY;
 737                 goto out;
 738         }
 739
 740         index = tx_pool->free_map[tx_pool->consumer_index];
 741         offset = index * adapter->req_mtu;
 742         dst = tx_pool->long_term_buff.buff + offset;
 743         memset(dst, 0, adapter->req_mtu);
 744         skb_copy_from_linear_data(skb, dst, skb->len);
 745         data_dma_addr = tx_pool->long_term_buff.addr + offset;
 746
 747         tx_pool->consumer_index =
 748             (tx_pool->consumer_index + 1) %
 749                 adapter->req_tx_entries_per_subcrq;
 750
 751         tx_buff = &tx_pool->tx_buff[index];
 752         tx_buff->skb = skb;
 753         tx_buff->data_dma[0] = data_dma_addr;
 754         tx_buff->data_len[0] = skb->len;
 755         tx_buff->index = index;
 756         tx_buff->pool_index = queue_num;
 757         tx_buff->last_frag = true;
 758         tx_buff->used_bounce = used_bounce;
 759
 760         memset(&tx_crq, 0, sizeof(tx_crq));
 761         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
 762         tx_crq.v1.type = IBMVNIC_TX_DESC;
 763         tx_crq.v1.n_crq_elem = 1;
 764         tx_crq.v1.n_sge = 1;
 765         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
 766         tx_crq.v1.correlator = cpu_to_be32(index);
 767         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
 768         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
 769         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
 770
 771         if (adapter->vlan_header_insertion) {
 772                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
 773                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
 774         }
 775
 776         if (skb->protocol == htons(ETH_P_IP)) {
 777                 if (ip_hdr(skb)->version == 4)
 778                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
 779                 else if (ip_hdr(skb)->version == 6)
 780                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
 781
 782                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 783                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
 784                 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
 785                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
 786         }
 787
 788         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 789                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
 790                 hdrs += 2;
 791         }
 792         /* determine if l2/3/4 headers are sent to firmware */
 793         if ((*hdrs >> 7) & 1 &&
 794             (skb->protocol == htons(ETH_P_IP) ||
 795              skb->protocol == htons(ETH_P_IPV6))) {
 796                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
 797                 tx_crq.v1.n_crq_elem = num_entries;
 798                 tx_buff->indir_arr[0] = tx_crq;
 799                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
 800                                                     sizeof(tx_buff->indir_arr),
 801                                                     DMA_TO_DEVICE);
 802                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
 803                         if (!firmware_has_feature(FW_FEATURE_CMO))
 804                                 dev_err(dev, "tx: unable to map descriptor array\n");
 805                         tx_map_failed++;
 806                         tx_dropped++;
 807                         ret = NETDEV_TX_BUSY;
 808                         goto out;
 809                 }
 810                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
 811                                                (u64)tx_buff->indir_dma,
 812                                                (u64)num_entries);
 813         } else {
 814                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
 815                                       &tx_crq);
 816         }
 817         if (lpar_rc != H_SUCCESS) {
 818                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
 819
 820                 if (tx_pool->consumer_index == 0)
 821                         tx_pool->consumer_index =
 822                                 adapter->req_tx_entries_per_subcrq - 1;
 823                 else
 824                         tx_pool->consumer_index--;
 825
 826                 tx_send_failed++;
 827                 tx_dropped++;
 828                 ret = NETDEV_TX_BUSY;
 829                 goto out;
 830         }
 831
 832         atomic_inc(&tx_scrq->used);
 833
 834         if (atomic_read(&tx_scrq->used) >= adapter->req_tx_entries_per_subcrq) {
 835                 netdev_info(netdev, "Stopping queue %d\n", queue_num);
 836                 netif_stop_subqueue(netdev, queue_num);
 837         }
 838
 839         tx_packets++;
 840         tx_bytes += skb->len;
 841         txq->trans_start = jiffies;
 842         ret = NETDEV_TX_OK;
 843
 844 out:
 845         netdev->stats.tx_dropped += tx_dropped;
 846         netdev->stats.tx_bytes += tx_bytes;
 847         netdev->stats.tx_packets += tx_packets;
 848         adapter->tx_send_failed += tx_send_failed;
 849         adapter->tx_map_failed += tx_map_failed;
 850
 851         return ret;
 852 }
 853
 854 static void ibmvnic_set_multi(struct net_device *netdev)
 855 {
 856         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 857         struct netdev_hw_addr *ha;
 858         union ibmvnic_crq crq;
 859
 860         memset(&crq, 0, sizeof(crq));
 861         crq.request_capability.first = IBMVNIC_CRQ_CMD;
 862         crq.request_capability.cmd = REQUEST_CAPABILITY;
 863
 864         if (netdev->flags & IFF_PROMISC) {
 865                 if (!adapter->promisc_supported)
 866                         return;
 867         } else {
 868                 if (netdev->flags & IFF_ALLMULTI) {
 869                         /* Accept all multicast */
 870                         memset(&crq, 0, sizeof(crq));
 871                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 872                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 873                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
 874                         ibmvnic_send_crq(adapter, &crq);
 875                 } else if (netdev_mc_empty(netdev)) {
 876                         /* Reject all multicast */
 877                         memset(&crq, 0, sizeof(crq));
 878                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 879                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 880                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
 881                         ibmvnic_send_crq(adapter, &crq);
 882                 } else {
 883                         /* Accept one or more multicast(s) */
 884                         netdev_for_each_mc_addr(ha, netdev) {
 885                                 memset(&crq, 0, sizeof(crq));
 886                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 887                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 888                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
 889                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
 890                                                 ha->addr);
 891                                 ibmvnic_send_crq(adapter, &crq);
 892                         }
 893                 }
 894         }
 895 }
 896
 897 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
 898 {
 899         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 900         struct sockaddr *addr = p;
 901         union ibmvnic_crq crq;
 902
 903         if (!is_valid_ether_addr(addr->sa_data))
 904                 return -EADDRNOTAVAIL;
 905
 906         memset(&crq, 0, sizeof(crq));
 907         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
 908         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
 909         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
 910         ibmvnic_send_crq(adapter, &crq);
 911         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
 912         return 0;
 913 }
 914
 915 static void ibmvnic_tx_timeout(struct net_device *dev)
 916 {
 917         struct ibmvnic_adapter *adapter = netdev_priv(dev);
 918         int rc;
 919
 920         /* Adapter timed out, resetting it */
 921         release_sub_crqs(adapter);
 922         rc = ibmvnic_reset_crq(adapter);
 923         if (rc)
 924                 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
 925         else
 926                 ibmvnic_send_crq_init(adapter);
 927 }
 928
 929 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
 930                                   struct ibmvnic_rx_buff *rx_buff)
 931 {
 932         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
 933
 934         rx_buff->skb = NULL;
 935
 936         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
 937         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
 938
 939         atomic_dec(&pool->available);
 940 }
 941
 942 static int ibmvnic_poll(struct napi_struct *napi, int budget)
 943 {
 944         struct net_device *netdev = napi->dev;
 945         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 946         int scrq_num = (int)(napi - adapter->napi);
 947         int frames_processed = 0;
 948 restart_poll:
 949         while (frames_processed < budget) {
 950                 struct sk_buff *skb;
 951                 struct ibmvnic_rx_buff *rx_buff;
 952                 union sub_crq *next;
 953                 u32 length;
 954                 u16 offset;
 955                 u8 flags = 0;
 956
 957                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
 958                         break;
 959                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
 960                 rx_buff =
 961                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
 962                                                           rx_comp.correlator);
 963                 /* do error checking */
 964                 if (next->rx_comp.rc) {
 965                         netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
 966                         /* free the entry */
 967                         next->rx_comp.first = 0;
 968                         remove_buff_from_pool(adapter, rx_buff);
 969                         break;
 970                 }
 971
 972                 length = be32_to_cpu(next->rx_comp.len);
 973                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
 974                 flags = next->rx_comp.flags;
 975                 skb = rx_buff->skb;
 976                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
 977                                         length);
 978                 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
 979                 /* free the entry */
 980                 next->rx_comp.first = 0;
 981                 remove_buff_from_pool(adapter, rx_buff);
 982
 983                 skb_put(skb, length);
 984                 skb->protocol = eth_type_trans(skb, netdev);
 985
 986                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
 987                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
 988                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 989                 }
 990
 991                 length = skb->len;
 992                 napi_gro_receive(napi, skb); /* send it up */
 993                 netdev->stats.rx_packets++;
 994                 netdev->stats.rx_bytes += length;
 995                 frames_processed++;
 996         }
 997         replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
 998
 999         if (frames_processed < budget) {
1000                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1001                 napi_complete_done(napi, frames_processed);
1002                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1003                     napi_reschedule(napi)) {
1004                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1005                         goto restart_poll;
1006                 }
1007         }
1008         return frames_processed;
1009 }
1010
1011 #ifdef CONFIG_NET_POLL_CONTROLLER
1012 static void ibmvnic_netpoll_controller(struct net_device *dev)
1013 {
1014         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1015         int i;
1016
1017         replenish_pools(netdev_priv(dev));
1018         for (i = 0; i < adapter->req_rx_queues; i++)
1019                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1020                                      adapter->rx_scrq[i]);
1021 }
1022 #endif
1023
1024 static const struct net_device_ops ibmvnic_netdev_ops = {
1025         .ndo_open               = ibmvnic_open,
1026         .ndo_stop               = ibmvnic_close,
1027         .ndo_start_xmit         = ibmvnic_xmit,
1028         .ndo_set_rx_mode        = ibmvnic_set_multi,
1029         .ndo_set_mac_address    = ibmvnic_set_mac,
1030         .ndo_validate_addr      = eth_validate_addr,
1031         .ndo_tx_timeout         = ibmvnic_tx_timeout,
1032 #ifdef CONFIG_NET_POLL_CONTROLLER
1033         .ndo_poll_controller    = ibmvnic_netpoll_controller,
1034 #endif
1035 };
1036
1037 /* ethtool functions */
1038
1039 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1040                                       struct ethtool_link_ksettings *cmd)
1041 {
1042         u32 supported, advertising;
1043
1044         supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1045                           SUPPORTED_FIBRE);
1046         advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1047                             ADVERTISED_FIBRE);
1048         cmd->base.speed = SPEED_1000;
1049         cmd->base.duplex = DUPLEX_FULL;
1050         cmd->base.port = PORT_FIBRE;
1051         cmd->base.phy_address = 0;
1052         cmd->base.autoneg = AUTONEG_ENABLE;
1053
1054         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1055                                                 supported);
1056         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1057                                                 advertising);
1058
1059         return 0;
1060 }
1061
1062 static void ibmvnic_get_drvinfo(struct net_device *dev,
1063                                 struct ethtool_drvinfo *info)
1064 {
1065         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1066         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1067 }
1068
1069 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1070 {
1071         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1072
1073         return adapter->msg_enable;
1074 }
1075
1076 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1077 {
1078         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1079
1080         adapter->msg_enable = data;
1081 }
1082
1083 static u32 ibmvnic_get_link(struct net_device *netdev)
1084 {
1085         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1086
1087         /* Don't need to send a query because we request a logical link up at
1088          * init and then we wait for link state indications
1089          */
1090         return adapter->logical_link_state;
1091 }
1092
1093 static void ibmvnic_get_ringparam(struct net_device *netdev,
1094                                   struct ethtool_ringparam *ring)
1095 {
1096         ring->rx_max_pending = 0;
1097         ring->tx_max_pending = 0;
1098         ring->rx_mini_max_pending = 0;
1099         ring->rx_jumbo_max_pending = 0;
1100         ring->rx_pending = 0;
1101         ring->tx_pending = 0;
1102         ring->rx_mini_pending = 0;
1103         ring->rx_jumbo_pending = 0;
1104 }
1105
1106 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1107 {
1108         int i;
1109
1110         if (stringset != ETH_SS_STATS)
1111                 return;
1112
1113         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1114                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1115 }
1116
1117 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1118 {
1119         switch (sset) {
1120         case ETH_SS_STATS:
1121                 return ARRAY_SIZE(ibmvnic_stats);
1122         default:
1123                 return -EOPNOTSUPP;
1124         }
1125 }
1126
1127 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1128                                       struct ethtool_stats *stats, u64 *data)
1129 {
1130         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1131         union ibmvnic_crq crq;
1132         int i;
1133
1134         memset(&crq, 0, sizeof(crq));
1135         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1136         crq.request_statistics.cmd = REQUEST_STATISTICS;
1137         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1138         crq.request_statistics.len =
1139             cpu_to_be32(sizeof(struct ibmvnic_statistics));
1140
1141         /* Wait for data to be written */
1142         init_completion(&adapter->stats_done);
1143         ibmvnic_send_crq(adapter, &crq);
1144         wait_for_completion(&adapter->stats_done);
1145
1146         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1147                 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1148 }
1149
1150 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1151         .get_drvinfo            = ibmvnic_get_drvinfo,
1152         .get_msglevel           = ibmvnic_get_msglevel,
1153         .set_msglevel           = ibmvnic_set_msglevel,
1154         .get_link               = ibmvnic_get_link,
1155         .get_ringparam          = ibmvnic_get_ringparam,
1156         .get_strings            = ibmvnic_get_strings,
1157         .get_sset_count         = ibmvnic_get_sset_count,
1158         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
1159         .get_link_ksettings     = ibmvnic_get_link_ksettings,
1160 };
1161
1162 /* Routines for managing CRQs/sCRQs  */
1163
1164 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1165                                   struct ibmvnic_sub_crq_queue *scrq)
1166 {
1167         struct device *dev = &adapter->vdev->dev;
1168         long rc;
1169
1170         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1171
1172         /* Close the sub-crqs */
1173         do {
1174                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1175                                         adapter->vdev->unit_address,
1176                                         scrq->crq_num);
1177         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1178
1179         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1180                          DMA_BIDIRECTIONAL);
1181         free_pages((unsigned long)scrq->msgs, 2);
1182         kfree(scrq);
1183 }
1184
1185 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1186                                                         *adapter)
1187 {
1188         struct device *dev = &adapter->vdev->dev;
1189         struct ibmvnic_sub_crq_queue *scrq;
1190         int rc;
1191
1192         scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1193         if (!scrq)
1194                 return NULL;
1195
1196         scrq->msgs = (union sub_crq *)__get_free_pages(GFP_ATOMIC, 2);
1197         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1198         if (!scrq->msgs) {
1199                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1200                 goto zero_page_failed;
1201         }
1202
1203         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1204                                          DMA_BIDIRECTIONAL);
1205         if (dma_mapping_error(dev, scrq->msg_token)) {
1206                 dev_warn(dev, "Couldn't map crq queue messages page\n");
1207                 goto map_failed;
1208         }
1209
1210         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1211                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1212
1213         if (rc == H_RESOURCE)
1214                 rc = ibmvnic_reset_crq(adapter);
1215
1216         if (rc == H_CLOSED) {
1217                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1218         } else if (rc) {
1219                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1220                 goto reg_failed;
1221         }
1222
1223         scrq->adapter = adapter;
1224         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1225         scrq->cur = 0;
1226         atomic_set(&scrq->used, 0);
1227         scrq->rx_skb_top = NULL;
1228         spin_lock_init(&scrq->lock);
1229
1230         netdev_dbg(adapter->netdev,
1231                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1232                    scrq->crq_num, scrq->hw_irq, scrq->irq);
1233
1234         return scrq;
1235
1236 reg_failed:
1237         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1238                          DMA_BIDIRECTIONAL);
1239 map_failed:
1240         free_pages((unsigned long)scrq->msgs, 2);
1241 zero_page_failed:
1242         kfree(scrq);
1243
1244         return NULL;
1245 }
1246
1247 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1248 {
1249         int i;
1250
1251         if (adapter->tx_scrq) {
1252                 for (i = 0; i < adapter->req_tx_queues; i++)
1253                         if (adapter->tx_scrq[i]) {
1254                                 free_irq(adapter->tx_scrq[i]->irq,
1255                                          adapter->tx_scrq[i]);
1256                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1257                                 release_sub_crq_queue(adapter,
1258                                                       adapter->tx_scrq[i]);
1259                         }
1260                 kfree(adapter->tx_scrq);
1261                 adapter->tx_scrq = NULL;
1262         }
1263
1264         if (adapter->rx_scrq) {
1265                 for (i = 0; i < adapter->req_rx_queues; i++)
1266                         if (adapter->rx_scrq[i]) {
1267                                 free_irq(adapter->rx_scrq[i]->irq,
1268                                          adapter->rx_scrq[i]);
1269                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1270                                 release_sub_crq_queue(adapter,
1271                                                       adapter->rx_scrq[i]);
1272                         }
1273                 kfree(adapter->rx_scrq);
1274                 adapter->rx_scrq = NULL;
1275         }
1276 }
1277
1278 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *adapter)
1279 {
1280         int i;
1281
1282         if (adapter->tx_scrq) {
1283                 for (i = 0; i < adapter->req_tx_queues; i++)
1284                         if (adapter->tx_scrq[i])
1285                                 release_sub_crq_queue(adapter,
1286                                                       adapter->tx_scrq[i]);
1287                 adapter->tx_scrq = NULL;
1288         }
1289
1290         if (adapter->rx_scrq) {
1291                 for (i = 0; i < adapter->req_rx_queues; i++)
1292                         if (adapter->rx_scrq[i])
1293                                 release_sub_crq_queue(adapter,
1294                                                       adapter->rx_scrq[i]);
1295                 adapter->rx_scrq = NULL;
1296         }
1297 }
1298
1299 static int disable_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         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1306                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1307         if (rc)
1308                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1309                         scrq->hw_irq, rc);
1310         return rc;
1311 }
1312
1313 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1314                            struct ibmvnic_sub_crq_queue *scrq)
1315 {
1316         struct device *dev = &adapter->vdev->dev;
1317         unsigned long rc;
1318
1319         if (scrq->hw_irq > 0x100000000ULL) {
1320                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1321                 return 1;
1322         }
1323
1324         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1325                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1326         if (rc)
1327                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1328                         scrq->hw_irq, rc);
1329         return rc;
1330 }
1331
1332 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1333                                struct ibmvnic_sub_crq_queue *scrq)
1334 {
1335         struct device *dev = &adapter->vdev->dev;
1336         struct ibmvnic_tx_buff *txbuff;
1337         union sub_crq *next;
1338         int index;
1339         int i, j;
1340         u8 first;
1341
1342 restart_loop:
1343         while (pending_scrq(adapter, scrq)) {
1344                 unsigned int pool = scrq->pool_index;
1345
1346                 next = ibmvnic_next_scrq(adapter, scrq);
1347                 for (i = 0; i < next->tx_comp.num_comps; i++) {
1348                         if (next->tx_comp.rcs[i]) {
1349                                 dev_err(dev, "tx error %x\n",
1350                                         next->tx_comp.rcs[i]);
1351                                 continue;
1352                         }
1353                         index = be32_to_cpu(next->tx_comp.correlators[i]);
1354                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
1355
1356                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1357                                 if (!txbuff->data_dma[j])
1358                                         continue;
1359
1360                                 txbuff->data_dma[j] = 0;
1361                                 txbuff->used_bounce = false;
1362                         }
1363                         /* if sub_crq was sent indirectly */
1364                         first = txbuff->indir_arr[0].generic.first;
1365                         if (first == IBMVNIC_CRQ_CMD) {
1366                                 dma_unmap_single(dev, txbuff->indir_dma,
1367                                                  sizeof(txbuff->indir_arr),
1368                                                  DMA_TO_DEVICE);
1369                         }
1370
1371                         if (txbuff->last_frag) {
1372                                 atomic_dec(&scrq->used);
1373
1374                                 if (atomic_read(&scrq->used) <=
1375                                     (adapter->req_tx_entries_per_subcrq / 2) &&
1376                                     netif_subqueue_stopped(adapter->netdev,
1377                                                            txbuff->skb)) {
1378                                         netif_wake_subqueue(adapter->netdev,
1379                                                             scrq->pool_index);
1380                                         netdev_dbg(adapter->netdev,
1381                                                    "Started queue %d\n",
1382                                                    scrq->pool_index);
1383                                 }
1384
1385                                 dev_kfree_skb_any(txbuff->skb);
1386                         }
1387
1388                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1389                                                      producer_index] = index;
1390                         adapter->tx_pool[pool].producer_index =
1391                             (adapter->tx_pool[pool].producer_index + 1) %
1392                             adapter->req_tx_entries_per_subcrq;
1393                 }
1394                 /* remove tx_comp scrq*/
1395                 next->tx_comp.first = 0;
1396         }
1397
1398         enable_scrq_irq(adapter, scrq);
1399
1400         if (pending_scrq(adapter, scrq)) {
1401                 disable_scrq_irq(adapter, scrq);
1402                 goto restart_loop;
1403         }
1404
1405         return 0;
1406 }
1407
1408 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1409 {
1410         struct ibmvnic_sub_crq_queue *scrq = instance;
1411         struct ibmvnic_adapter *adapter = scrq->adapter;
1412
1413         disable_scrq_irq(adapter, scrq);
1414         ibmvnic_complete_tx(adapter, scrq);
1415
1416         return IRQ_HANDLED;
1417 }
1418
1419 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1420 {
1421         struct ibmvnic_sub_crq_queue *scrq = instance;
1422         struct ibmvnic_adapter *adapter = scrq->adapter;
1423
1424         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1425                 disable_scrq_irq(adapter, scrq);
1426                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1427         }
1428
1429         return IRQ_HANDLED;
1430 }
1431
1432 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1433 {
1434         struct device *dev = &adapter->vdev->dev;
1435         struct ibmvnic_sub_crq_queue *scrq;
1436         int i = 0, j = 0;
1437         int rc = 0;
1438
1439         for (i = 0; i < adapter->req_tx_queues; i++) {
1440                 scrq = adapter->tx_scrq[i];
1441                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1442
1443                 if (!scrq->irq) {
1444                         rc = -EINVAL;
1445                         dev_err(dev, "Error mapping irq\n");
1446                         goto req_tx_irq_failed;
1447                 }
1448
1449                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1450                                  0, "ibmvnic_tx", scrq);
1451
1452                 if (rc) {
1453                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1454                                 scrq->irq, rc);
1455                         irq_dispose_mapping(scrq->irq);
1456                         goto req_rx_irq_failed;
1457                 }
1458         }
1459
1460         for (i = 0; i < adapter->req_rx_queues; i++) {
1461                 scrq = adapter->rx_scrq[i];
1462                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1463                 if (!scrq->irq) {
1464                         rc = -EINVAL;
1465                         dev_err(dev, "Error mapping irq\n");
1466                         goto req_rx_irq_failed;
1467                 }
1468                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1469                                  0, "ibmvnic_rx", scrq);
1470                 if (rc) {
1471                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1472                                 scrq->irq, rc);
1473                         irq_dispose_mapping(scrq->irq);
1474                         goto req_rx_irq_failed;
1475                 }
1476         }
1477         return rc;
1478
1479 req_rx_irq_failed:
1480         for (j = 0; j < i; j++) {
1481                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1482                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1483         }
1484         i = adapter->req_tx_queues;
1485 req_tx_irq_failed:
1486         for (j = 0; j < i; j++) {
1487                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1488                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1489         }
1490         release_sub_crqs_no_irqs(adapter);
1491         return rc;
1492 }
1493
1494 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1495 {
1496         struct device *dev = &adapter->vdev->dev;
1497         struct ibmvnic_sub_crq_queue **allqueues;
1498         int registered_queues = 0;
1499         union ibmvnic_crq crq;
1500         int total_queues;
1501         int more = 0;
1502         int i;
1503
1504         if (!retry) {
1505                 /* Sub-CRQ entries are 32 byte long */
1506                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1507
1508                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1509                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
1510                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1511                         goto allqueues_failed;
1512                 }
1513
1514                 /* Get the minimum between the queried max and the entries
1515                  * that fit in our PAGE_SIZE
1516                  */
1517                 adapter->req_tx_entries_per_subcrq =
1518                     adapter->max_tx_entries_per_subcrq > entries_page ?
1519                     entries_page : adapter->max_tx_entries_per_subcrq;
1520                 adapter->req_rx_add_entries_per_subcrq =
1521                     adapter->max_rx_add_entries_per_subcrq > entries_page ?
1522                     entries_page : adapter->max_rx_add_entries_per_subcrq;
1523
1524                 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
1525                 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
1526                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
1527
1528                 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
1529         }
1530
1531         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1532
1533         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1534         if (!allqueues)
1535                 goto allqueues_failed;
1536
1537         for (i = 0; i < total_queues; i++) {
1538                 allqueues[i] = init_sub_crq_queue(adapter);
1539                 if (!allqueues[i]) {
1540                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1541                         break;
1542                 }
1543                 registered_queues++;
1544         }
1545
1546         /* Make sure we were able to register the minimum number of queues */
1547         if (registered_queues <
1548             adapter->min_tx_queues + adapter->min_rx_queues) {
1549                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
1550                 goto tx_failed;
1551         }
1552
1553         /* Distribute the failed allocated queues*/
1554         for (i = 0; i < total_queues - registered_queues + more ; i++) {
1555                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1556                 switch (i % 3) {
1557                 case 0:
1558                         if (adapter->req_rx_queues > adapter->min_rx_queues)
1559                                 adapter->req_rx_queues--;
1560                         else
1561                                 more++;
1562                         break;
1563                 case 1:
1564                         if (adapter->req_tx_queues > adapter->min_tx_queues)
1565                                 adapter->req_tx_queues--;
1566                         else
1567                                 more++;
1568                         break;
1569                 }
1570         }
1571
1572         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1573                                    sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1574         if (!adapter->tx_scrq)
1575                 goto tx_failed;
1576
1577         for (i = 0; i < adapter->req_tx_queues; i++) {
1578                 adapter->tx_scrq[i] = allqueues[i];
1579                 adapter->tx_scrq[i]->pool_index = i;
1580         }
1581
1582         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1583                                    sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1584         if (!adapter->rx_scrq)
1585                 goto rx_failed;
1586
1587         for (i = 0; i < adapter->req_rx_queues; i++) {
1588                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1589                 adapter->rx_scrq[i]->scrq_num = i;
1590         }
1591
1592         memset(&crq, 0, sizeof(crq));
1593         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1594         crq.request_capability.cmd = REQUEST_CAPABILITY;
1595
1596         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
1597         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
1598         atomic_inc(&adapter->running_cap_crqs);
1599         ibmvnic_send_crq(adapter, &crq);
1600
1601         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
1602         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
1603         atomic_inc(&adapter->running_cap_crqs);
1604         ibmvnic_send_crq(adapter, &crq);
1605
1606         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
1607         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
1608         atomic_inc(&adapter->running_cap_crqs);
1609         ibmvnic_send_crq(adapter, &crq);
1610
1611         crq.request_capability.capability =
1612             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1613         crq.request_capability.number =
1614             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
1615         atomic_inc(&adapter->running_cap_crqs);
1616         ibmvnic_send_crq(adapter, &crq);
1617
1618         crq.request_capability.capability =
1619             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1620         crq.request_capability.number =
1621             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
1622         atomic_inc(&adapter->running_cap_crqs);
1623         ibmvnic_send_crq(adapter, &crq);
1624
1625         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
1626         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
1627         atomic_inc(&adapter->running_cap_crqs);
1628         ibmvnic_send_crq(adapter, &crq);
1629
1630         if (adapter->netdev->flags & IFF_PROMISC) {
1631                 if (adapter->promisc_supported) {
1632                         crq.request_capability.capability =
1633                             cpu_to_be16(PROMISC_REQUESTED);
1634                         crq.request_capability.number = cpu_to_be64(1);
1635                         atomic_inc(&adapter->running_cap_crqs);
1636                         ibmvnic_send_crq(adapter, &crq);
1637                 }
1638         } else {
1639                 crq.request_capability.capability =
1640                     cpu_to_be16(PROMISC_REQUESTED);
1641                 crq.request_capability.number = cpu_to_be64(0);
1642                 atomic_inc(&adapter->running_cap_crqs);
1643                 ibmvnic_send_crq(adapter, &crq);
1644         }
1645
1646         kfree(allqueues);
1647
1648         return;
1649
1650 rx_failed:
1651         kfree(adapter->tx_scrq);
1652         adapter->tx_scrq = NULL;
1653 tx_failed:
1654         for (i = 0; i < registered_queues; i++)
1655                 release_sub_crq_queue(adapter, allqueues[i]);
1656         kfree(allqueues);
1657 allqueues_failed:
1658         ibmvnic_remove(adapter->vdev);
1659 }
1660
1661 static int pending_scrq(struct ibmvnic_adapter *adapter,
1662                         struct ibmvnic_sub_crq_queue *scrq)
1663 {
1664         union sub_crq *entry = &scrq->msgs[scrq->cur];
1665
1666         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1667                 return 1;
1668         else
1669                 return 0;
1670 }
1671
1672 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1673                                         struct ibmvnic_sub_crq_queue *scrq)
1674 {
1675         union sub_crq *entry;
1676         unsigned long flags;
1677
1678         spin_lock_irqsave(&scrq->lock, flags);
1679         entry = &scrq->msgs[scrq->cur];
1680         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1681                 if (++scrq->cur == scrq->size)
1682                         scrq->cur = 0;
1683         } else {
1684                 entry = NULL;
1685         }
1686         spin_unlock_irqrestore(&scrq->lock, flags);
1687
1688         return entry;
1689 }
1690
1691 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1692 {
1693         struct ibmvnic_crq_queue *queue = &adapter->crq;
1694         union ibmvnic_crq *crq;
1695
1696         crq = &queue->msgs[queue->cur];
1697         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1698                 if (++queue->cur == queue->size)
1699                         queue->cur = 0;
1700         } else {
1701                 crq = NULL;
1702         }
1703
1704         return crq;
1705 }
1706
1707 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1708                        union sub_crq *sub_crq)
1709 {
1710         unsigned int ua = adapter->vdev->unit_address;
1711         struct device *dev = &adapter->vdev->dev;
1712         u64 *u64_crq = (u64 *)sub_crq;
1713         int rc;
1714
1715         netdev_dbg(adapter->netdev,
1716                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1717                    (unsigned long int)cpu_to_be64(remote_handle),
1718                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1719                    (unsigned long int)cpu_to_be64(u64_crq[1]),
1720                    (unsigned long int)cpu_to_be64(u64_crq[2]),
1721                    (unsigned long int)cpu_to_be64(u64_crq[3]));
1722
1723         /* Make sure the hypervisor sees the complete request */
1724         mb();
1725
1726         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1727                                 cpu_to_be64(remote_handle),
1728                                 cpu_to_be64(u64_crq[0]),
1729                                 cpu_to_be64(u64_crq[1]),
1730                                 cpu_to_be64(u64_crq[2]),
1731                                 cpu_to_be64(u64_crq[3]));
1732
1733         if (rc) {
1734                 if (rc == H_CLOSED)
1735                         dev_warn(dev, "CRQ Queue closed\n");
1736                 dev_err(dev, "Send error (rc=%d)\n", rc);
1737         }
1738
1739         return rc;
1740 }
1741
1742 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
1743                                 u64 remote_handle, u64 ioba, u64 num_entries)
1744 {
1745         unsigned int ua = adapter->vdev->unit_address;
1746         struct device *dev = &adapter->vdev->dev;
1747         int rc;
1748
1749         /* Make sure the hypervisor sees the complete request */
1750         mb();
1751         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
1752                                 cpu_to_be64(remote_handle),
1753                                 ioba, num_entries);
1754
1755         if (rc) {
1756                 if (rc == H_CLOSED)
1757                         dev_warn(dev, "CRQ Queue closed\n");
1758                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
1759         }
1760
1761         return rc;
1762 }
1763
1764 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1765                             union ibmvnic_crq *crq)
1766 {
1767         unsigned int ua = adapter->vdev->unit_address;
1768         struct device *dev = &adapter->vdev->dev;
1769         u64 *u64_crq = (u64 *)crq;
1770         int rc;
1771
1772         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1773                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1774                    (unsigned long int)cpu_to_be64(u64_crq[1]));
1775
1776         /* Make sure the hypervisor sees the complete request */
1777         mb();
1778
1779         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1780                                 cpu_to_be64(u64_crq[0]),
1781                                 cpu_to_be64(u64_crq[1]));
1782
1783         if (rc) {
1784                 if (rc == H_CLOSED)
1785                         dev_warn(dev, "CRQ Queue closed\n");
1786                 dev_warn(dev, "Send error (rc=%d)\n", rc);
1787         }
1788
1789         return rc;
1790 }
1791
1792 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1793 {
1794         union ibmvnic_crq crq;
1795
1796         memset(&crq, 0, sizeof(crq));
1797         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1798         crq.generic.cmd = IBMVNIC_CRQ_INIT;
1799         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1800
1801         return ibmvnic_send_crq(adapter, &crq);
1802 }
1803
1804 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1805 {
1806         union ibmvnic_crq crq;
1807
1808         memset(&crq, 0, sizeof(crq));
1809         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1810         crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1811         netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1812
1813         return ibmvnic_send_crq(adapter, &crq);
1814 }
1815
1816 static int send_version_xchg(struct ibmvnic_adapter *adapter)
1817 {
1818         union ibmvnic_crq crq;
1819
1820         memset(&crq, 0, sizeof(crq));
1821         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1822         crq.version_exchange.cmd = VERSION_EXCHANGE;
1823         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1824
1825         return ibmvnic_send_crq(adapter, &crq);
1826 }
1827
1828 static void send_login(struct ibmvnic_adapter *adapter)
1829 {
1830         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1831         struct ibmvnic_login_buffer *login_buffer;
1832         struct ibmvnic_inflight_cmd *inflight_cmd;
1833         struct device *dev = &adapter->vdev->dev;
1834         dma_addr_t rsp_buffer_token;
1835         dma_addr_t buffer_token;
1836         size_t rsp_buffer_size;
1837         union ibmvnic_crq crq;
1838         unsigned long flags;
1839         size_t buffer_size;
1840         __be64 *tx_list_p;
1841         __be64 *rx_list_p;
1842         int i;
1843
1844         buffer_size =
1845             sizeof(struct ibmvnic_login_buffer) +
1846             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1847
1848         login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1849         if (!login_buffer)
1850                 goto buf_alloc_failed;
1851
1852         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1853                                       DMA_TO_DEVICE);
1854         if (dma_mapping_error(dev, buffer_token)) {
1855                 dev_err(dev, "Couldn't map login buffer\n");
1856                 goto buf_map_failed;
1857         }
1858
1859         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
1860                           sizeof(u64) * adapter->req_tx_queues +
1861                           sizeof(u64) * adapter->req_rx_queues +
1862                           sizeof(u64) * adapter->req_rx_queues +
1863                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
1864
1865         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1866         if (!login_rsp_buffer)
1867                 goto buf_rsp_alloc_failed;
1868
1869         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1870                                           rsp_buffer_size, DMA_FROM_DEVICE);
1871         if (dma_mapping_error(dev, rsp_buffer_token)) {
1872                 dev_err(dev, "Couldn't map login rsp buffer\n");
1873                 goto buf_rsp_map_failed;
1874         }
1875         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
1876         if (!inflight_cmd) {
1877                 dev_err(dev, "Couldn't allocate inflight_cmd\n");
1878                 goto inflight_alloc_failed;
1879         }
1880         adapter->login_buf = login_buffer;
1881         adapter->login_buf_token = buffer_token;
1882         adapter->login_buf_sz = buffer_size;
1883         adapter->login_rsp_buf = login_rsp_buffer;
1884         adapter->login_rsp_buf_token = rsp_buffer_token;
1885         adapter->login_rsp_buf_sz = rsp_buffer_size;
1886
1887         login_buffer->len = cpu_to_be32(buffer_size);
1888         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
1889         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
1890         login_buffer->off_txcomp_subcrqs =
1891             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
1892         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
1893         login_buffer->off_rxcomp_subcrqs =
1894             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
1895                         sizeof(u64) * adapter->req_tx_queues);
1896         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
1897         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
1898
1899         tx_list_p = (__be64 *)((char *)login_buffer +
1900                                       sizeof(struct ibmvnic_login_buffer));
1901         rx_list_p = (__be64 *)((char *)login_buffer +
1902                                       sizeof(struct ibmvnic_login_buffer) +
1903                                       sizeof(u64) * adapter->req_tx_queues);
1904
1905         for (i = 0; i < adapter->req_tx_queues; i++) {
1906                 if (adapter->tx_scrq[i]) {
1907                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
1908                                                    crq_num);
1909                 }
1910         }
1911
1912         for (i = 0; i < adapter->req_rx_queues; i++) {
1913                 if (adapter->rx_scrq[i]) {
1914                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
1915                                                    crq_num);
1916                 }
1917         }
1918
1919         netdev_dbg(adapter->netdev, "Login Buffer:\n");
1920         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
1921                 netdev_dbg(adapter->netdev, "%016lx\n",
1922                            ((unsigned long int *)(adapter->login_buf))[i]);
1923         }
1924
1925         memset(&crq, 0, sizeof(crq));
1926         crq.login.first = IBMVNIC_CRQ_CMD;
1927         crq.login.cmd = LOGIN;
1928         crq.login.ioba = cpu_to_be32(buffer_token);
1929         crq.login.len = cpu_to_be32(buffer_size);
1930
1931         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
1932
1933         spin_lock_irqsave(&adapter->inflight_lock, flags);
1934         list_add_tail(&inflight_cmd->list, &adapter->inflight);
1935         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
1936
1937         ibmvnic_send_crq(adapter, &crq);
1938
1939         return;
1940
1941 inflight_alloc_failed:
1942         dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
1943                          DMA_FROM_DEVICE);
1944 buf_rsp_map_failed:
1945         kfree(login_rsp_buffer);
1946 buf_rsp_alloc_failed:
1947         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
1948 buf_map_failed:
1949         kfree(login_buffer);
1950 buf_alloc_failed:
1951         return;
1952 }
1953
1954 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
1955                              u32 len, u8 map_id)
1956 {
1957         union ibmvnic_crq crq;
1958
1959         memset(&crq, 0, sizeof(crq));
1960         crq.request_map.first = IBMVNIC_CRQ_CMD;
1961         crq.request_map.cmd = REQUEST_MAP;
1962         crq.request_map.map_id = map_id;
1963         crq.request_map.ioba = cpu_to_be32(addr);
1964         crq.request_map.len = cpu_to_be32(len);
1965         ibmvnic_send_crq(adapter, &crq);
1966 }
1967
1968 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
1969 {
1970         union ibmvnic_crq crq;
1971
1972         memset(&crq, 0, sizeof(crq));
1973         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
1974         crq.request_unmap.cmd = REQUEST_UNMAP;
1975         crq.request_unmap.map_id = map_id;
1976         ibmvnic_send_crq(adapter, &crq);
1977 }
1978
1979 static void send_map_query(struct ibmvnic_adapter *adapter)
1980 {
1981         union ibmvnic_crq crq;
1982
1983         memset(&crq, 0, sizeof(crq));
1984         crq.query_map.first = IBMVNIC_CRQ_CMD;
1985         crq.query_map.cmd = QUERY_MAP;
1986         ibmvnic_send_crq(adapter, &crq);
1987 }
1988
1989 /* Send a series of CRQs requesting various capabilities of the VNIC server */
1990 static void send_cap_queries(struct ibmvnic_adapter *adapter)
1991 {
1992         union ibmvnic_crq crq;
1993
1994         atomic_set(&adapter->running_cap_crqs, 0);
1995         memset(&crq, 0, sizeof(crq));
1996         crq.query_capability.first = IBMVNIC_CRQ_CMD;
1997         crq.query_capability.cmd = QUERY_CAPABILITY;
1998
1999         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
2000         atomic_inc(&adapter->running_cap_crqs);
2001         ibmvnic_send_crq(adapter, &crq);
2002
2003         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
2004         atomic_inc(&adapter->running_cap_crqs);
2005         ibmvnic_send_crq(adapter, &crq);
2006
2007         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
2008         atomic_inc(&adapter->running_cap_crqs);
2009         ibmvnic_send_crq(adapter, &crq);
2010
2011         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
2012         atomic_inc(&adapter->running_cap_crqs);
2013         ibmvnic_send_crq(adapter, &crq);
2014
2015         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
2016         atomic_inc(&adapter->running_cap_crqs);
2017         ibmvnic_send_crq(adapter, &crq);
2018
2019         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
2020         atomic_inc(&adapter->running_cap_crqs);
2021         ibmvnic_send_crq(adapter, &crq);
2022
2023         crq.query_capability.capability =
2024             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
2025         atomic_inc(&adapter->running_cap_crqs);
2026         ibmvnic_send_crq(adapter, &crq);
2027
2028         crq.query_capability.capability =
2029             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2030         atomic_inc(&adapter->running_cap_crqs);
2031         ibmvnic_send_crq(adapter, &crq);
2032
2033         crq.query_capability.capability =
2034             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2035         atomic_inc(&adapter->running_cap_crqs);
2036         ibmvnic_send_crq(adapter, &crq);
2037
2038         crq.query_capability.capability =
2039             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2040         atomic_inc(&adapter->running_cap_crqs);
2041         ibmvnic_send_crq(adapter, &crq);
2042
2043         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2044         atomic_inc(&adapter->running_cap_crqs);
2045         ibmvnic_send_crq(adapter, &crq);
2046
2047         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2048         atomic_inc(&adapter->running_cap_crqs);
2049         ibmvnic_send_crq(adapter, &crq);
2050
2051         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2052         atomic_inc(&adapter->running_cap_crqs);
2053         ibmvnic_send_crq(adapter, &crq);
2054
2055         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2056         atomic_inc(&adapter->running_cap_crqs);
2057         ibmvnic_send_crq(adapter, &crq);
2058
2059         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2060         atomic_inc(&adapter->running_cap_crqs);
2061         ibmvnic_send_crq(adapter, &crq);
2062
2063         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2064         atomic_inc(&adapter->running_cap_crqs);
2065         ibmvnic_send_crq(adapter, &crq);
2066
2067         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2068         atomic_inc(&adapter->running_cap_crqs);
2069         ibmvnic_send_crq(adapter, &crq);
2070
2071         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2072         atomic_inc(&adapter->running_cap_crqs);
2073         ibmvnic_send_crq(adapter, &crq);
2074
2075         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2076         atomic_inc(&adapter->running_cap_crqs);
2077         ibmvnic_send_crq(adapter, &crq);
2078
2079         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2080         atomic_inc(&adapter->running_cap_crqs);
2081         ibmvnic_send_crq(adapter, &crq);
2082
2083         crq.query_capability.capability =
2084                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2085         atomic_inc(&adapter->running_cap_crqs);
2086         ibmvnic_send_crq(adapter, &crq);
2087
2088         crq.query_capability.capability =
2089                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2090         atomic_inc(&adapter->running_cap_crqs);
2091         ibmvnic_send_crq(adapter, &crq);
2092
2093         crq.query_capability.capability =
2094                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2095         atomic_inc(&adapter->running_cap_crqs);
2096         ibmvnic_send_crq(adapter, &crq);
2097
2098         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2099         atomic_inc(&adapter->running_cap_crqs);
2100         ibmvnic_send_crq(adapter, &crq);
2101 }
2102
2103 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2104 {
2105         struct device *dev = &adapter->vdev->dev;
2106         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2107         union ibmvnic_crq crq;
2108         int i;
2109
2110         dma_unmap_single(dev, adapter->ip_offload_tok,
2111                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2112
2113         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2114         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2115                 netdev_dbg(adapter->netdev, "%016lx\n",
2116                            ((unsigned long int *)(buf))[i]);
2117
2118         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2119         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2120         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2121                    buf->tcp_ipv4_chksum);
2122         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2123                    buf->tcp_ipv6_chksum);
2124         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2125                    buf->udp_ipv4_chksum);
2126         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2127                    buf->udp_ipv6_chksum);
2128         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2129                    buf->large_tx_ipv4);
2130         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2131                    buf->large_tx_ipv6);
2132         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2133                    buf->large_rx_ipv4);
2134         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2135                    buf->large_rx_ipv6);
2136         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2137                    buf->max_ipv4_header_size);
2138         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2139                    buf->max_ipv6_header_size);
2140         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2141                    buf->max_tcp_header_size);
2142         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2143                    buf->max_udp_header_size);
2144         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2145                    buf->max_large_tx_size);
2146         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2147                    buf->max_large_rx_size);
2148         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2149                    buf->ipv6_extension_header);
2150         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2151                    buf->tcp_pseudosum_req);
2152         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2153                    buf->num_ipv6_ext_headers);
2154         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2155                    buf->off_ipv6_ext_headers);
2156
2157         adapter->ip_offload_ctrl_tok =
2158             dma_map_single(dev, &adapter->ip_offload_ctrl,
2159                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2160
2161         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2162                 dev_err(dev, "Couldn't map ip offload control buffer\n");
2163                 return;
2164         }
2165
2166         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2167         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2168         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2169         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2170         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2171
2172         /* large_tx/rx disabled for now, additional features needed */
2173         adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2174         adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2175         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2176         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2177
2178         adapter->netdev->features = NETIF_F_GSO;
2179
2180         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2181                 adapter->netdev->features |= NETIF_F_IP_CSUM;
2182
2183         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2184                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2185
2186         if ((adapter->netdev->features &
2187             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2188                 adapter->netdev->features |= NETIF_F_RXCSUM;
2189
2190         memset(&crq, 0, sizeof(crq));
2191         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2192         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2193         crq.control_ip_offload.len =
2194             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2195         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2196         ibmvnic_send_crq(adapter, &crq);
2197 }
2198
2199 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2200                                   struct ibmvnic_adapter *adapter)
2201 {
2202         struct device *dev = &adapter->vdev->dev;
2203         struct ibmvnic_error_buff *error_buff, *tmp;
2204         unsigned long flags;
2205         bool found = false;
2206         int i;
2207
2208         if (!crq->request_error_rsp.rc.code) {
2209                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2210                          crq->request_error_rsp.rc.code);
2211                 return;
2212         }
2213
2214         spin_lock_irqsave(&adapter->error_list_lock, flags);
2215         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2216                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2217                         found = true;
2218                         list_del(&error_buff->list);
2219                         break;
2220                 }
2221         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2222
2223         if (!found) {
2224                 dev_err(dev, "Couldn't find error id %x\n",
2225                         be32_to_cpu(crq->request_error_rsp.error_id));
2226                 return;
2227         }
2228
2229         dev_err(dev, "Detailed info for error id %x:",
2230                 be32_to_cpu(crq->request_error_rsp.error_id));
2231
2232         for (i = 0; i < error_buff->len; i++) {
2233                 pr_cont("%02x", (int)error_buff->buff[i]);
2234                 if (i % 8 == 7)
2235                         pr_cont(" ");
2236         }
2237         pr_cont("\n");
2238
2239         dma_unmap_single(dev, error_buff->dma, error_buff->len,
2240                          DMA_FROM_DEVICE);
2241         kfree(error_buff->buff);
2242         kfree(error_buff);
2243 }
2244
2245 static void handle_dump_size_rsp(union ibmvnic_crq *crq,
2246                                  struct ibmvnic_adapter *adapter)
2247 {
2248         int len = be32_to_cpu(crq->request_dump_size_rsp.len);
2249         struct ibmvnic_inflight_cmd *inflight_cmd;
2250         struct device *dev = &adapter->vdev->dev;
2251         union ibmvnic_crq newcrq;
2252         unsigned long flags;
2253
2254         /* allocate and map buffer */
2255         adapter->dump_data = kmalloc(len, GFP_KERNEL);
2256         if (!adapter->dump_data) {
2257                 complete(&adapter->fw_done);
2258                 return;
2259         }
2260
2261         adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len,
2262                                                   DMA_FROM_DEVICE);
2263
2264         if (dma_mapping_error(dev, adapter->dump_data_token)) {
2265                 if (!firmware_has_feature(FW_FEATURE_CMO))
2266                         dev_err(dev, "Couldn't map dump data\n");
2267                 kfree(adapter->dump_data);
2268                 complete(&adapter->fw_done);
2269                 return;
2270         }
2271
2272         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2273         if (!inflight_cmd) {
2274                 dma_unmap_single(dev, adapter->dump_data_token, len,
2275                                  DMA_FROM_DEVICE);
2276                 kfree(adapter->dump_data);
2277                 complete(&adapter->fw_done);
2278                 return;
2279         }
2280
2281         memset(&newcrq, 0, sizeof(newcrq));
2282         newcrq.request_dump.first = IBMVNIC_CRQ_CMD;
2283         newcrq.request_dump.cmd = REQUEST_DUMP;
2284         newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token);
2285         newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size);
2286
2287         memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq));
2288
2289         spin_lock_irqsave(&adapter->inflight_lock, flags);
2290         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2291         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2292
2293         ibmvnic_send_crq(adapter, &newcrq);
2294 }
2295
2296 static void handle_error_indication(union ibmvnic_crq *crq,
2297                                     struct ibmvnic_adapter *adapter)
2298 {
2299         int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2300         struct ibmvnic_inflight_cmd *inflight_cmd;
2301         struct device *dev = &adapter->vdev->dev;
2302         struct ibmvnic_error_buff *error_buff;
2303         union ibmvnic_crq new_crq;
2304         unsigned long flags;
2305
2306         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2307                 crq->error_indication.
2308                     flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2309                 be32_to_cpu(crq->error_indication.error_id),
2310                 be16_to_cpu(crq->error_indication.error_cause));
2311
2312         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2313         if (!error_buff)
2314                 return;
2315
2316         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2317         if (!error_buff->buff) {
2318                 kfree(error_buff);
2319                 return;
2320         }
2321
2322         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2323                                          DMA_FROM_DEVICE);
2324         if (dma_mapping_error(dev, error_buff->dma)) {
2325                 if (!firmware_has_feature(FW_FEATURE_CMO))
2326                         dev_err(dev, "Couldn't map error buffer\n");
2327                 kfree(error_buff->buff);
2328                 kfree(error_buff);
2329                 return;
2330         }
2331
2332         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2333         if (!inflight_cmd) {
2334                 dma_unmap_single(dev, error_buff->dma, detail_len,
2335                                  DMA_FROM_DEVICE);
2336                 kfree(error_buff->buff);
2337                 kfree(error_buff);
2338                 return;
2339         }
2340
2341         error_buff->len = detail_len;
2342         error_buff->error_id = crq->error_indication.error_id;
2343
2344         spin_lock_irqsave(&adapter->error_list_lock, flags);
2345         list_add_tail(&error_buff->list, &adapter->errors);
2346         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2347
2348         memset(&new_crq, 0, sizeof(new_crq));
2349         new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2350         new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2351         new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2352         new_crq.request_error_info.len = cpu_to_be32(detail_len);
2353         new_crq.request_error_info.error_id = crq->error_indication.error_id;
2354
2355         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2356
2357         spin_lock_irqsave(&adapter->inflight_lock, flags);
2358         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2359         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2360
2361         ibmvnic_send_crq(adapter, &new_crq);
2362 }
2363
2364 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2365                                   struct ibmvnic_adapter *adapter)
2366 {
2367         struct net_device *netdev = adapter->netdev;
2368         struct device *dev = &adapter->vdev->dev;
2369         long rc;
2370
2371         rc = crq->change_mac_addr_rsp.rc.code;
2372         if (rc) {
2373                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2374                 return;
2375         }
2376         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2377                ETH_ALEN);
2378 }
2379
2380 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2381                                    struct ibmvnic_adapter *adapter)
2382 {
2383         struct device *dev = &adapter->vdev->dev;
2384         u64 *req_value;
2385         char *name;
2386
2387         atomic_dec(&adapter->running_cap_crqs);
2388         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2389         case REQ_TX_QUEUES:
2390                 req_value = &adapter->req_tx_queues;
2391                 name = "tx";
2392                 break;
2393         case REQ_RX_QUEUES:
2394                 req_value = &adapter->req_rx_queues;
2395                 name = "rx";
2396                 break;
2397         case REQ_RX_ADD_QUEUES:
2398                 req_value = &adapter->req_rx_add_queues;
2399                 name = "rx_add";
2400                 break;
2401         case REQ_TX_ENTRIES_PER_SUBCRQ:
2402                 req_value = &adapter->req_tx_entries_per_subcrq;
2403                 name = "tx_entries_per_subcrq";
2404                 break;
2405         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2406                 req_value = &adapter->req_rx_add_entries_per_subcrq;
2407                 name = "rx_add_entries_per_subcrq";
2408                 break;
2409         case REQ_MTU:
2410                 req_value = &adapter->req_mtu;
2411                 name = "mtu";
2412                 break;
2413         case PROMISC_REQUESTED:
2414                 req_value = &adapter->promisc;
2415                 name = "promisc";
2416                 break;
2417         default:
2418                 dev_err(dev, "Got invalid cap request rsp %d\n",
2419                         crq->request_capability.capability);
2420                 return;
2421         }
2422
2423         switch (crq->request_capability_rsp.rc.code) {
2424         case SUCCESS:
2425                 break;
2426         case PARTIALSUCCESS:
2427                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2428                          *req_value,
2429                          (long int)be64_to_cpu(crq->request_capability_rsp.
2430                                                number), name);
2431                 release_sub_crqs_no_irqs(adapter);
2432                 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
2433                 init_sub_crqs(adapter, 1);
2434                 return;
2435         default:
2436                 dev_err(dev, "Error %d in request cap rsp\n",
2437                         crq->request_capability_rsp.rc.code);
2438                 return;
2439         }
2440
2441         /* Done receiving requested capabilities, query IP offload support */
2442         if (atomic_read(&adapter->running_cap_crqs) == 0) {
2443                 union ibmvnic_crq newcrq;
2444                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2445                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2446                     &adapter->ip_offload_buf;
2447
2448                 adapter->wait_capability = false;
2449                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2450                                                          buf_sz,
2451                                                          DMA_FROM_DEVICE);
2452
2453                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2454                         if (!firmware_has_feature(FW_FEATURE_CMO))
2455                                 dev_err(dev, "Couldn't map offload buffer\n");
2456                         return;
2457                 }
2458
2459                 memset(&newcrq, 0, sizeof(newcrq));
2460                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2461                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2462                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2463                 newcrq.query_ip_offload.ioba =
2464                     cpu_to_be32(adapter->ip_offload_tok);
2465
2466                 ibmvnic_send_crq(adapter, &newcrq);
2467         }
2468 }
2469
2470 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2471                             struct ibmvnic_adapter *adapter)
2472 {
2473         struct device *dev = &adapter->vdev->dev;
2474         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2475         struct ibmvnic_login_buffer *login = adapter->login_buf;
2476         union ibmvnic_crq crq;
2477         int i;
2478
2479         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2480                          DMA_BIDIRECTIONAL);
2481         dma_unmap_single(dev, adapter->login_rsp_buf_token,
2482                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2483
2484         /* If the number of queues requested can't be allocated by the
2485          * server, the login response will return with code 1. We will need
2486          * to resend the login buffer with fewer queues requested.
2487          */
2488         if (login_rsp_crq->generic.rc.code) {
2489                 adapter->renegotiate = true;
2490                 complete(&adapter->init_done);
2491                 return 0;
2492         }
2493
2494         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2495         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2496                 netdev_dbg(adapter->netdev, "%016lx\n",
2497                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2498         }
2499
2500         /* Sanity checks */
2501         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2502             (be32_to_cpu(login->num_rxcomp_subcrqs) *
2503              adapter->req_rx_add_queues !=
2504              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2505                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2506                 ibmvnic_remove(adapter->vdev);
2507                 return -EIO;
2508         }
2509         complete(&adapter->init_done);
2510
2511         memset(&crq, 0, sizeof(crq));
2512         crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD;
2513         crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM;
2514         ibmvnic_send_crq(adapter, &crq);
2515
2516         return 0;
2517 }
2518
2519 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2520                                    struct ibmvnic_adapter *adapter)
2521 {
2522         struct device *dev = &adapter->vdev->dev;
2523         u8 map_id = crq->request_map_rsp.map_id;
2524         int tx_subcrqs;
2525         int rx_subcrqs;
2526         long rc;
2527         int i;
2528
2529         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2530         rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2531
2532         rc = crq->request_map_rsp.rc.code;
2533         if (rc) {
2534                 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2535                 adapter->map_id--;
2536                 /* need to find and zero tx/rx_pool map_id */
2537                 for (i = 0; i < tx_subcrqs; i++) {
2538                         if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2539                                 adapter->tx_pool[i].long_term_buff.map_id = 0;
2540                 }
2541                 for (i = 0; i < rx_subcrqs; i++) {
2542                         if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2543                                 adapter->rx_pool[i].long_term_buff.map_id = 0;
2544                 }
2545         }
2546         complete(&adapter->fw_done);
2547 }
2548
2549 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2550                                      struct ibmvnic_adapter *adapter)
2551 {
2552         struct device *dev = &adapter->vdev->dev;
2553         long rc;
2554
2555         rc = crq->request_unmap_rsp.rc.code;
2556         if (rc)
2557                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2558 }
2559
2560 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2561                                  struct ibmvnic_adapter *adapter)
2562 {
2563         struct net_device *netdev = adapter->netdev;
2564         struct device *dev = &adapter->vdev->dev;
2565         long rc;
2566
2567         rc = crq->query_map_rsp.rc.code;
2568         if (rc) {
2569                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2570                 return;
2571         }
2572         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2573                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2574                    crq->query_map_rsp.free_pages);
2575 }
2576
2577 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2578                                  struct ibmvnic_adapter *adapter)
2579 {
2580         struct net_device *netdev = adapter->netdev;
2581         struct device *dev = &adapter->vdev->dev;
2582         long rc;
2583
2584         atomic_dec(&adapter->running_cap_crqs);
2585         netdev_dbg(netdev, "Outstanding queries: %d\n",
2586                    atomic_read(&adapter->running_cap_crqs));
2587         rc = crq->query_capability.rc.code;
2588         if (rc) {
2589                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2590                 goto out;
2591         }
2592
2593         switch (be16_to_cpu(crq->query_capability.capability)) {
2594         case MIN_TX_QUEUES:
2595                 adapter->min_tx_queues =
2596                     be64_to_cpu(crq->query_capability.number);
2597                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2598                            adapter->min_tx_queues);
2599                 break;
2600         case MIN_RX_QUEUES:
2601                 adapter->min_rx_queues =
2602                     be64_to_cpu(crq->query_capability.number);
2603                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2604                            adapter->min_rx_queues);
2605                 break;
2606         case MIN_RX_ADD_QUEUES:
2607                 adapter->min_rx_add_queues =
2608                     be64_to_cpu(crq->query_capability.number);
2609                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2610                            adapter->min_rx_add_queues);
2611                 break;
2612         case MAX_TX_QUEUES:
2613                 adapter->max_tx_queues =
2614                     be64_to_cpu(crq->query_capability.number);
2615                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2616                            adapter->max_tx_queues);
2617                 break;
2618         case MAX_RX_QUEUES:
2619                 adapter->max_rx_queues =
2620                     be64_to_cpu(crq->query_capability.number);
2621                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2622                            adapter->max_rx_queues);
2623                 break;
2624         case MAX_RX_ADD_QUEUES:
2625                 adapter->max_rx_add_queues =
2626                     be64_to_cpu(crq->query_capability.number);
2627                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2628                            adapter->max_rx_add_queues);
2629                 break;
2630         case MIN_TX_ENTRIES_PER_SUBCRQ:
2631                 adapter->min_tx_entries_per_subcrq =
2632                     be64_to_cpu(crq->query_capability.number);
2633                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2634                            adapter->min_tx_entries_per_subcrq);
2635                 break;
2636         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2637                 adapter->min_rx_add_entries_per_subcrq =
2638                     be64_to_cpu(crq->query_capability.number);
2639                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2640                            adapter->min_rx_add_entries_per_subcrq);
2641                 break;
2642         case MAX_TX_ENTRIES_PER_SUBCRQ:
2643                 adapter->max_tx_entries_per_subcrq =
2644                     be64_to_cpu(crq->query_capability.number);
2645                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2646                            adapter->max_tx_entries_per_subcrq);
2647                 break;
2648         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2649                 adapter->max_rx_add_entries_per_subcrq =
2650                     be64_to_cpu(crq->query_capability.number);
2651                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2652                            adapter->max_rx_add_entries_per_subcrq);
2653                 break;
2654         case TCP_IP_OFFLOAD:
2655                 adapter->tcp_ip_offload =
2656                     be64_to_cpu(crq->query_capability.number);
2657                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2658                            adapter->tcp_ip_offload);
2659                 break;
2660         case PROMISC_SUPPORTED:
2661                 adapter->promisc_supported =
2662                     be64_to_cpu(crq->query_capability.number);
2663                 netdev_dbg(netdev, "promisc_supported = %lld\n",
2664                            adapter->promisc_supported);
2665                 break;
2666         case MIN_MTU:
2667                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
2668                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
2669                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2670                 break;
2671         case MAX_MTU:
2672                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
2673                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
2674                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2675                 break;
2676         case MAX_MULTICAST_FILTERS:
2677                 adapter->max_multicast_filters =
2678                     be64_to_cpu(crq->query_capability.number);
2679                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2680                            adapter->max_multicast_filters);
2681                 break;
2682         case VLAN_HEADER_INSERTION:
2683                 adapter->vlan_header_insertion =
2684                     be64_to_cpu(crq->query_capability.number);
2685                 if (adapter->vlan_header_insertion)
2686                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2687                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2688                            adapter->vlan_header_insertion);
2689                 break;
2690         case MAX_TX_SG_ENTRIES:
2691                 adapter->max_tx_sg_entries =
2692                     be64_to_cpu(crq->query_capability.number);
2693                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2694                            adapter->max_tx_sg_entries);
2695                 break;
2696         case RX_SG_SUPPORTED:
2697                 adapter->rx_sg_supported =
2698                     be64_to_cpu(crq->query_capability.number);
2699                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2700                            adapter->rx_sg_supported);
2701                 break;
2702         case OPT_TX_COMP_SUB_QUEUES:
2703                 adapter->opt_tx_comp_sub_queues =
2704                     be64_to_cpu(crq->query_capability.number);
2705                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2706                            adapter->opt_tx_comp_sub_queues);
2707                 break;
2708         case OPT_RX_COMP_QUEUES:
2709                 adapter->opt_rx_comp_queues =
2710                     be64_to_cpu(crq->query_capability.number);
2711                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2712                            adapter->opt_rx_comp_queues);
2713                 break;
2714         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2715                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
2716                     be64_to_cpu(crq->query_capability.number);
2717                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2718                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
2719                 break;
2720         case OPT_TX_ENTRIES_PER_SUBCRQ:
2721                 adapter->opt_tx_entries_per_subcrq =
2722                     be64_to_cpu(crq->query_capability.number);
2723                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2724                            adapter->opt_tx_entries_per_subcrq);
2725                 break;
2726         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2727                 adapter->opt_rxba_entries_per_subcrq =
2728                     be64_to_cpu(crq->query_capability.number);
2729                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2730                            adapter->opt_rxba_entries_per_subcrq);
2731                 break;
2732         case TX_RX_DESC_REQ:
2733                 adapter->tx_rx_desc_req = crq->query_capability.number;
2734                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2735                            adapter->tx_rx_desc_req);
2736                 break;
2737
2738         default:
2739                 netdev_err(netdev, "Got invalid cap rsp %d\n",
2740                            crq->query_capability.capability);
2741         }
2742
2743 out:
2744         if (atomic_read(&adapter->running_cap_crqs) == 0) {
2745                 adapter->wait_capability = false;
2746                 init_sub_crqs(adapter, 0);
2747                 /* We're done querying the capabilities, initialize sub-crqs */
2748         }
2749 }
2750
2751 static void handle_control_ras_rsp(union ibmvnic_crq *crq,
2752                                    struct ibmvnic_adapter *adapter)
2753 {
2754         u8 correlator = crq->control_ras_rsp.correlator;
2755         struct device *dev = &adapter->vdev->dev;
2756         bool found = false;
2757         int i;
2758
2759         if (crq->control_ras_rsp.rc.code) {
2760                 dev_warn(dev, "Control ras failed rc=%d\n",
2761                          crq->control_ras_rsp.rc.code);
2762                 return;
2763         }
2764
2765         for (i = 0; i < adapter->ras_comp_num; i++) {
2766                 if (adapter->ras_comps[i].correlator == correlator) {
2767                         found = true;
2768                         break;
2769                 }
2770         }
2771
2772         if (!found) {
2773                 dev_warn(dev, "Correlator not found on control_ras_rsp\n");
2774                 return;
2775         }
2776
2777         switch (crq->control_ras_rsp.op) {
2778         case IBMVNIC_TRACE_LEVEL:
2779                 adapter->ras_comps[i].trace_level = crq->control_ras.level;
2780                 break;
2781         case IBMVNIC_ERROR_LEVEL:
2782                 adapter->ras_comps[i].error_check_level =
2783                     crq->control_ras.level;
2784                 break;
2785         case IBMVNIC_TRACE_PAUSE:
2786                 adapter->ras_comp_int[i].paused = 1;
2787                 break;
2788         case IBMVNIC_TRACE_RESUME:
2789                 adapter->ras_comp_int[i].paused = 0;
2790                 break;
2791         case IBMVNIC_TRACE_ON:
2792                 adapter->ras_comps[i].trace_on = 1;
2793                 break;
2794         case IBMVNIC_TRACE_OFF:
2795                 adapter->ras_comps[i].trace_on = 0;
2796                 break;
2797         case IBMVNIC_CHG_TRACE_BUFF_SZ:
2798                 /* trace_buff_sz is 3 bytes, stuff it into an int */
2799                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0;
2800                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] =
2801                     crq->control_ras_rsp.trace_buff_sz[0];
2802                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] =
2803                     crq->control_ras_rsp.trace_buff_sz[1];
2804                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] =
2805                     crq->control_ras_rsp.trace_buff_sz[2];
2806                 break;
2807         default:
2808                 dev_err(dev, "invalid op %d on control_ras_rsp",
2809                         crq->control_ras_rsp.op);
2810         }
2811 }
2812
2813 static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len,
2814                           loff_t *ppos)
2815 {
2816         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2817         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2818         struct device *dev = &adapter->vdev->dev;
2819         struct ibmvnic_fw_trace_entry *trace;
2820         int num = ras_comp_int->num;
2821         union ibmvnic_crq crq;
2822         dma_addr_t trace_tok;
2823
2824         if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2825                 return 0;
2826
2827         trace =
2828             dma_alloc_coherent(dev,
2829                                be32_to_cpu(adapter->ras_comps[num].
2830                                            trace_buff_size), &trace_tok,
2831                                GFP_KERNEL);
2832         if (!trace) {
2833                 dev_err(dev, "Couldn't alloc trace buffer\n");
2834                 return 0;
2835         }
2836
2837         memset(&crq, 0, sizeof(crq));
2838         crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD;
2839         crq.collect_fw_trace.cmd = COLLECT_FW_TRACE;
2840         crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator;
2841         crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok);
2842         crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size;
2843
2844         init_completion(&adapter->fw_done);
2845         ibmvnic_send_crq(adapter, &crq);
2846         wait_for_completion(&adapter->fw_done);
2847
2848         if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2849                 len =
2850                     be32_to_cpu(adapter->ras_comps[num].trace_buff_size) -
2851                     *ppos;
2852
2853         copy_to_user(user_buf, &((u8 *)trace)[*ppos], len);
2854
2855         dma_free_coherent(dev,
2856                           be32_to_cpu(adapter->ras_comps[num].trace_buff_size),
2857                           trace, trace_tok);
2858         *ppos += len;
2859         return len;
2860 }
2861
2862 static const struct file_operations trace_ops = {
2863         .owner          = THIS_MODULE,
2864         .open           = simple_open,
2865         .read           = trace_read,
2866 };
2867
2868 static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len,
2869                            loff_t *ppos)
2870 {
2871         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2872         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2873         int num = ras_comp_int->num;
2874         char buff[5]; /*  1 or 0 plus \n and \0 */
2875         int size;
2876
2877         size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused);
2878
2879         if (*ppos >= size)
2880                 return 0;
2881
2882         copy_to_user(user_buf, buff, size);
2883         *ppos += size;
2884         return size;
2885 }
2886
2887 static ssize_t paused_write(struct file *file, const char __user *user_buf,
2888                             size_t len, loff_t *ppos)
2889 {
2890         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2891         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2892         int num = ras_comp_int->num;
2893         union ibmvnic_crq crq;
2894         unsigned long val;
2895         char buff[9]; /* decimal max int plus \n and \0 */
2896
2897         copy_from_user(buff, user_buf, sizeof(buff));
2898         val = kstrtoul(buff, 10, NULL);
2899
2900         adapter->ras_comp_int[num].paused = val ? 1 : 0;
2901
2902         memset(&crq, 0, sizeof(crq));
2903         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2904         crq.control_ras.cmd = CONTROL_RAS;
2905         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2906         crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME;
2907         ibmvnic_send_crq(adapter, &crq);
2908
2909         return len;
2910 }
2911
2912 static const struct file_operations paused_ops = {
2913         .owner          = THIS_MODULE,
2914         .open           = simple_open,
2915         .read           = paused_read,
2916         .write          = paused_write,
2917 };
2918
2919 static ssize_t tracing_read(struct file *file, char __user *user_buf,
2920                             size_t len, loff_t *ppos)
2921 {
2922         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2923         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2924         int num = ras_comp_int->num;
2925         char buff[5]; /*  1 or 0 plus \n and \0 */
2926         int size;
2927
2928         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on);
2929
2930         if (*ppos >= size)
2931                 return 0;
2932
2933         copy_to_user(user_buf, buff, size);
2934         *ppos += size;
2935         return size;
2936 }
2937
2938 static ssize_t tracing_write(struct file *file, const char __user *user_buf,
2939                              size_t len, loff_t *ppos)
2940 {
2941         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2942         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2943         int num = ras_comp_int->num;
2944         union ibmvnic_crq crq;
2945         unsigned long val;
2946         char buff[9]; /* decimal max int plus \n and \0 */
2947
2948         copy_from_user(buff, user_buf, sizeof(buff));
2949         val = kstrtoul(buff, 10, NULL);
2950
2951         memset(&crq, 0, sizeof(crq));
2952         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2953         crq.control_ras.cmd = CONTROL_RAS;
2954         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2955         crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF;
2956
2957         return len;
2958 }
2959
2960 static const struct file_operations tracing_ops = {
2961         .owner          = THIS_MODULE,
2962         .open           = simple_open,
2963         .read           = tracing_read,
2964         .write          = tracing_write,
2965 };
2966
2967 static ssize_t error_level_read(struct file *file, char __user *user_buf,
2968                                 size_t len, loff_t *ppos)
2969 {
2970         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2971         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2972         int num = ras_comp_int->num;
2973         char buff[5]; /* decimal max char plus \n and \0 */
2974         int size;
2975
2976         size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level);
2977
2978         if (*ppos >= size)
2979                 return 0;
2980
2981         copy_to_user(user_buf, buff, size);
2982         *ppos += size;
2983         return size;
2984 }
2985
2986 static ssize_t error_level_write(struct file *file, const char __user *user_buf,
2987                                  size_t len, loff_t *ppos)
2988 {
2989         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2990         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2991         int num = ras_comp_int->num;
2992         union ibmvnic_crq crq;
2993         unsigned long val;
2994         char buff[9]; /* decimal max int plus \n and \0 */
2995
2996         copy_from_user(buff, user_buf, sizeof(buff));
2997         val = kstrtoul(buff, 10, NULL);
2998
2999         if (val > 9)
3000                 val = 9;
3001
3002         memset(&crq, 0, sizeof(crq));
3003         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3004         crq.control_ras.cmd = CONTROL_RAS;
3005         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
3006         crq.control_ras.op = IBMVNIC_ERROR_LEVEL;
3007         crq.control_ras.level = val;
3008         ibmvnic_send_crq(adapter, &crq);
3009
3010         return len;
3011 }
3012
3013 static const struct file_operations error_level_ops = {
3014         .owner          = THIS_MODULE,
3015         .open           = simple_open,
3016         .read           = error_level_read,
3017         .write          = error_level_write,
3018 };
3019
3020 static ssize_t trace_level_read(struct file *file, char __user *user_buf,
3021                                 size_t len, loff_t *ppos)
3022 {
3023         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3024         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3025         int num = ras_comp_int->num;
3026         char buff[5]; /* decimal max char plus \n and \0 */
3027         int size;
3028
3029         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level);
3030         if (*ppos >= size)
3031                 return 0;
3032
3033         copy_to_user(user_buf, buff, size);
3034         *ppos += size;
3035         return size;
3036 }
3037
3038 static ssize_t trace_level_write(struct file *file, const char __user *user_buf,
3039                                  size_t len, loff_t *ppos)
3040 {
3041         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3042         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3043         union ibmvnic_crq crq;
3044         unsigned long val;
3045         char buff[9]; /* decimal max int plus \n and \0 */
3046
3047         copy_from_user(buff, user_buf, sizeof(buff));
3048         val = kstrtoul(buff, 10, NULL);
3049         if (val > 9)
3050                 val = 9;
3051
3052         memset(&crq, 0, sizeof(crq));
3053         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3054         crq.control_ras.cmd = CONTROL_RAS;
3055         crq.control_ras.correlator =
3056             adapter->ras_comps[ras_comp_int->num].correlator;
3057         crq.control_ras.op = IBMVNIC_TRACE_LEVEL;
3058         crq.control_ras.level = val;
3059         ibmvnic_send_crq(adapter, &crq);
3060
3061         return len;
3062 }
3063
3064 static const struct file_operations trace_level_ops = {
3065         .owner          = THIS_MODULE,
3066         .open           = simple_open,
3067         .read           = trace_level_read,
3068         .write          = trace_level_write,
3069 };
3070
3071 static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf,
3072                                     size_t len, loff_t *ppos)
3073 {
3074         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3075         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3076         int num = ras_comp_int->num;
3077         char buff[9]; /* decimal max int plus \n and \0 */
3078         int size;
3079
3080         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size);
3081         if (*ppos >= size)
3082                 return 0;
3083
3084         copy_to_user(user_buf, buff, size);
3085         *ppos += size;
3086         return size;
3087 }
3088
3089 static ssize_t trace_buff_size_write(struct file *file,
3090                                      const char __user *user_buf, size_t len,
3091                                      loff_t *ppos)
3092 {
3093         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3094         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3095         union ibmvnic_crq crq;
3096         unsigned long val;
3097         char buff[9]; /* decimal max int plus \n and \0 */
3098
3099         copy_from_user(buff, user_buf, sizeof(buff));
3100         val = kstrtoul(buff, 10, NULL);
3101
3102         memset(&crq, 0, sizeof(crq));
3103         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3104         crq.control_ras.cmd = CONTROL_RAS;
3105         crq.control_ras.correlator =
3106             adapter->ras_comps[ras_comp_int->num].correlator;
3107         crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ;
3108         /* trace_buff_sz is 3 bytes, stuff an int into it */
3109         crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5];
3110         crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6];
3111         crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7];
3112         ibmvnic_send_crq(adapter, &crq);
3113
3114         return len;
3115 }
3116
3117 static const struct file_operations trace_size_ops = {
3118         .owner          = THIS_MODULE,
3119         .open           = simple_open,
3120         .read           = trace_buff_size_read,
3121         .write          = trace_buff_size_write,
3122 };
3123
3124 static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq,
3125                                          struct ibmvnic_adapter *adapter)
3126 {
3127         struct device *dev = &adapter->vdev->dev;
3128         struct dentry *dir_ent;
3129         struct dentry *ent;
3130         int i;
3131
3132         debugfs_remove_recursive(adapter->ras_comps_ent);
3133
3134         adapter->ras_comps_ent = debugfs_create_dir("ras_comps",
3135                                                     adapter->debugfs_dir);
3136         if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) {
3137                 dev_info(dev, "debugfs create ras_comps dir failed\n");
3138                 return;
3139         }
3140
3141         for (i = 0; i < adapter->ras_comp_num; i++) {
3142                 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name,
3143                                              adapter->ras_comps_ent);
3144                 if (!dir_ent || IS_ERR(dir_ent)) {
3145                         dev_info(dev, "debugfs create %s dir failed\n",
3146                                  adapter->ras_comps[i].name);
3147                         continue;
3148                 }
3149
3150                 adapter->ras_comp_int[i].adapter = adapter;
3151                 adapter->ras_comp_int[i].num = i;
3152                 adapter->ras_comp_int[i].desc_blob.data =
3153                     &adapter->ras_comps[i].description;
3154                 adapter->ras_comp_int[i].desc_blob.size =
3155                     sizeof(adapter->ras_comps[i].description);
3156
3157                 /* Don't need to remember the dentry's because the debugfs dir
3158                  * gets removed recursively
3159                  */
3160                 ent = debugfs_create_blob("description", S_IRUGO, dir_ent,
3161                                           &adapter->ras_comp_int[i].desc_blob);
3162                 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR,
3163                                           dir_ent, &adapter->ras_comp_int[i],
3164                                           &trace_size_ops);
3165                 ent = debugfs_create_file("trace_level",
3166                                           S_IRUGO |
3167                                           (adapter->ras_comps[i].trace_level !=
3168                                            0xFF  ? S_IWUSR : 0),
3169                                            dir_ent, &adapter->ras_comp_int[i],
3170                                            &trace_level_ops);
3171                 ent = debugfs_create_file("error_level",
3172                                           S_IRUGO |
3173                                           (adapter->
3174                                            ras_comps[i].error_check_level !=
3175                                            0xFF ? S_IWUSR : 0),
3176                                           dir_ent, &adapter->ras_comp_int[i],
3177                                           &trace_level_ops);
3178                 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR,
3179                                           dir_ent, &adapter->ras_comp_int[i],
3180                                           &tracing_ops);
3181                 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR,
3182                                           dir_ent, &adapter->ras_comp_int[i],
3183                                           &paused_ops);
3184                 ent = debugfs_create_file("trace", S_IRUGO, dir_ent,
3185                                           &adapter->ras_comp_int[i],
3186                                           &trace_ops);
3187         }
3188 }
3189
3190 static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq,
3191                                             struct ibmvnic_adapter *adapter)
3192 {
3193         int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component);
3194         struct device *dev = &adapter->vdev->dev;
3195         union ibmvnic_crq newcrq;
3196
3197         adapter->ras_comps = dma_alloc_coherent(dev, len,
3198                                                 &adapter->ras_comps_tok,
3199                                                 GFP_KERNEL);
3200         if (!adapter->ras_comps) {
3201                 if (!firmware_has_feature(FW_FEATURE_CMO))
3202                         dev_err(dev, "Couldn't alloc fw comps buffer\n");
3203                 return;
3204         }
3205
3206         adapter->ras_comp_int = kmalloc(adapter->ras_comp_num *
3207                                         sizeof(struct ibmvnic_fw_comp_internal),
3208                                         GFP_KERNEL);
3209         if (!adapter->ras_comp_int)
3210                 dma_free_coherent(dev, len, adapter->ras_comps,
3211                                   adapter->ras_comps_tok);
3212
3213         memset(&newcrq, 0, sizeof(newcrq));
3214         newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD;
3215         newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS;
3216         newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok);
3217         newcrq.request_ras_comps.len = cpu_to_be32(len);
3218         ibmvnic_send_crq(adapter, &newcrq);
3219 }
3220
3221 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
3222 {
3223         struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1;
3224         struct device *dev = &adapter->vdev->dev;
3225         struct ibmvnic_error_buff *error_buff, *tmp2;
3226         unsigned long flags;
3227         unsigned long flags2;
3228
3229         spin_lock_irqsave(&adapter->inflight_lock, flags);
3230         list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) {
3231                 switch (inflight_cmd->crq.generic.cmd) {
3232                 case LOGIN:
3233                         dma_unmap_single(dev, adapter->login_buf_token,
3234                                          adapter->login_buf_sz,
3235                                          DMA_BIDIRECTIONAL);
3236                         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3237                                          adapter->login_rsp_buf_sz,
3238                                          DMA_BIDIRECTIONAL);
3239                         kfree(adapter->login_rsp_buf);
3240                         kfree(adapter->login_buf);
3241                         break;
3242                 case REQUEST_DUMP:
3243                         complete(&adapter->fw_done);
3244                         break;
3245                 case REQUEST_ERROR_INFO:
3246                         spin_lock_irqsave(&adapter->error_list_lock, flags2);
3247                         list_for_each_entry_safe(error_buff, tmp2,
3248                                                  &adapter->errors, list) {
3249                                 dma_unmap_single(dev, error_buff->dma,
3250                                                  error_buff->len,
3251                                                  DMA_FROM_DEVICE);
3252                                 kfree(error_buff->buff);
3253                                 list_del(&error_buff->list);
3254                                 kfree(error_buff);
3255                         }
3256                         spin_unlock_irqrestore(&adapter->error_list_lock,
3257                                                flags2);
3258                         break;
3259                 }
3260                 list_del(&inflight_cmd->list);
3261                 kfree(inflight_cmd);
3262         }
3263         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
3264 }
3265
3266 static void ibmvnic_xport_event(struct work_struct *work)
3267 {
3268         struct ibmvnic_adapter *adapter = container_of(work,
3269                                                        struct ibmvnic_adapter,
3270                                                        ibmvnic_xport);
3271         struct device *dev = &adapter->vdev->dev;
3272         long rc;
3273
3274         ibmvnic_free_inflight(adapter);
3275         release_sub_crqs(adapter);
3276         if (adapter->migrated) {
3277                 rc = ibmvnic_reenable_crq_queue(adapter);
3278                 if (rc)
3279                         dev_err(dev, "Error after enable rc=%ld\n", rc);
3280                 adapter->migrated = false;
3281                 rc = ibmvnic_send_crq_init(adapter);
3282                 if (rc)
3283                         dev_err(dev, "Error sending init rc=%ld\n", rc);
3284         }
3285 }
3286
3287 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3288                                struct ibmvnic_adapter *adapter)
3289 {
3290         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3291         struct net_device *netdev = adapter->netdev;
3292         struct device *dev = &adapter->vdev->dev;
3293         long rc;
3294
3295         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3296                    ((unsigned long int *)crq)[0],
3297                    ((unsigned long int *)crq)[1]);
3298         switch (gen_crq->first) {
3299         case IBMVNIC_CRQ_INIT_RSP:
3300                 switch (gen_crq->cmd) {
3301                 case IBMVNIC_CRQ_INIT:
3302                         dev_info(dev, "Partner initialized\n");
3303                         /* Send back a response */
3304                         rc = ibmvnic_send_crq_init_complete(adapter);
3305                         if (!rc)
3306                                 schedule_work(&adapter->vnic_crq_init);
3307                         else
3308                                 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
3309                         break;
3310                 case IBMVNIC_CRQ_INIT_COMPLETE:
3311                         dev_info(dev, "Partner initialization complete\n");
3312                         send_version_xchg(adapter);
3313                         break;
3314                 default:
3315                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3316                 }
3317                 return;
3318         case IBMVNIC_CRQ_XPORT_EVENT:
3319                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3320                         dev_info(dev, "Re-enabling adapter\n");
3321                         adapter->migrated = true;
3322                         schedule_work(&adapter->ibmvnic_xport);
3323                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3324                         dev_info(dev, "Backing device failover detected\n");
3325                         netif_carrier_off(netdev);
3326                         adapter->failover = true;
3327                 } else {
3328                         /* The adapter lost the connection */
3329                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3330                                 gen_crq->cmd);
3331                         schedule_work(&adapter->ibmvnic_xport);
3332                 }
3333                 return;
3334         case IBMVNIC_CRQ_CMD_RSP:
3335                 break;
3336         default:
3337                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3338                         gen_crq->first);
3339                 return;
3340         }
3341
3342         switch (gen_crq->cmd) {
3343         case VERSION_EXCHANGE_RSP:
3344                 rc = crq->version_exchange_rsp.rc.code;
3345                 if (rc) {
3346                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3347                         break;
3348                 }
3349                 dev_info(dev, "Partner protocol version is %d\n",
3350                          crq->version_exchange_rsp.version);
3351                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3352                     ibmvnic_version)
3353                         ibmvnic_version =
3354                             be16_to_cpu(crq->version_exchange_rsp.version);
3355                 send_cap_queries(adapter);
3356                 break;
3357         case QUERY_CAPABILITY_RSP:
3358                 handle_query_cap_rsp(crq, adapter);
3359                 break;
3360         case QUERY_MAP_RSP:
3361                 handle_query_map_rsp(crq, adapter);
3362                 break;
3363         case REQUEST_MAP_RSP:
3364                 handle_request_map_rsp(crq, adapter);
3365                 break;
3366         case REQUEST_UNMAP_RSP:
3367                 handle_request_unmap_rsp(crq, adapter);
3368                 break;
3369         case REQUEST_CAPABILITY_RSP:
3370                 handle_request_cap_rsp(crq, adapter);
3371                 break;
3372         case LOGIN_RSP:
3373                 netdev_dbg(netdev, "Got Login Response\n");
3374                 handle_login_rsp(crq, adapter);
3375                 break;
3376         case LOGICAL_LINK_STATE_RSP:
3377                 netdev_dbg(netdev, "Got Logical Link State Response\n");
3378                 adapter->logical_link_state =
3379                     crq->logical_link_state_rsp.link_state;
3380                 break;
3381         case LINK_STATE_INDICATION:
3382                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3383                 adapter->phys_link_state =
3384                     crq->link_state_indication.phys_link_state;
3385                 adapter->logical_link_state =
3386                     crq->link_state_indication.logical_link_state;
3387                 break;
3388         case CHANGE_MAC_ADDR_RSP:
3389                 netdev_dbg(netdev, "Got MAC address change Response\n");
3390                 handle_change_mac_rsp(crq, adapter);
3391                 break;
3392         case ERROR_INDICATION:
3393                 netdev_dbg(netdev, "Got Error Indication\n");
3394                 handle_error_indication(crq, adapter);
3395                 break;
3396         case REQUEST_ERROR_RSP:
3397                 netdev_dbg(netdev, "Got Error Detail Response\n");
3398                 handle_error_info_rsp(crq, adapter);
3399                 break;
3400         case REQUEST_STATISTICS_RSP:
3401                 netdev_dbg(netdev, "Got Statistics Response\n");
3402                 complete(&adapter->stats_done);
3403                 break;
3404         case REQUEST_DUMP_SIZE_RSP:
3405                 netdev_dbg(netdev, "Got Request Dump Size Response\n");
3406                 handle_dump_size_rsp(crq, adapter);
3407                 break;
3408         case REQUEST_DUMP_RSP:
3409                 netdev_dbg(netdev, "Got Request Dump Response\n");
3410                 complete(&adapter->fw_done);
3411                 break;
3412         case QUERY_IP_OFFLOAD_RSP:
3413                 netdev_dbg(netdev, "Got Query IP offload Response\n");
3414                 handle_query_ip_offload_rsp(adapter);
3415                 break;
3416         case MULTICAST_CTRL_RSP:
3417                 netdev_dbg(netdev, "Got multicast control Response\n");
3418                 break;
3419         case CONTROL_IP_OFFLOAD_RSP:
3420                 netdev_dbg(netdev, "Got Control IP offload Response\n");
3421                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3422                                  sizeof(adapter->ip_offload_ctrl),
3423                                  DMA_TO_DEVICE);
3424                 /* We're done with the queries, perform the login */
3425                 send_login(adapter);
3426                 break;
3427         case REQUEST_RAS_COMP_NUM_RSP:
3428                 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n");
3429                 if (crq->request_ras_comp_num_rsp.rc.code == 10) {
3430                         netdev_dbg(netdev, "Request RAS Comp Num not supported\n");
3431                         break;
3432                 }
3433                 adapter->ras_comp_num =
3434                     be32_to_cpu(crq->request_ras_comp_num_rsp.num_components);
3435                 handle_request_ras_comp_num_rsp(crq, adapter);
3436                 break;
3437         case REQUEST_RAS_COMPS_RSP:
3438                 netdev_dbg(netdev, "Got Request RAS Comps Response\n");
3439                 handle_request_ras_comps_rsp(crq, adapter);
3440                 break;
3441         case CONTROL_RAS_RSP:
3442                 netdev_dbg(netdev, "Got Control RAS Response\n");
3443                 handle_control_ras_rsp(crq, adapter);
3444                 break;
3445         case COLLECT_FW_TRACE_RSP:
3446                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3447                 complete(&adapter->fw_done);
3448                 break;
3449         default:
3450                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3451                            gen_crq->cmd);
3452         }
3453 }
3454
3455 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3456 {
3457         struct ibmvnic_adapter *adapter = instance;
3458         unsigned long flags;
3459
3460         spin_lock_irqsave(&adapter->crq.lock, flags);
3461         vio_disable_interrupts(adapter->vdev);
3462         tasklet_schedule(&adapter->tasklet);
3463         spin_unlock_irqrestore(&adapter->crq.lock, flags);
3464         return IRQ_HANDLED;
3465 }
3466
3467 static void ibmvnic_tasklet(void *data)
3468 {
3469         struct ibmvnic_adapter *adapter = data;
3470         struct ibmvnic_crq_queue *queue = &adapter->crq;
3471         struct vio_dev *vdev = adapter->vdev;
3472         union ibmvnic_crq *crq;
3473         unsigned long flags;
3474         bool done = false;
3475
3476         spin_lock_irqsave(&queue->lock, flags);
3477         vio_disable_interrupts(vdev);
3478         while (!done) {
3479                 /* Pull all the valid messages off the CRQ */
3480                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3481                         ibmvnic_handle_crq(crq, adapter);
3482                         crq->generic.first = 0;
3483                 }
3484                 vio_enable_interrupts(vdev);
3485                 crq = ibmvnic_next_crq(adapter);
3486                 if (crq) {
3487                         vio_disable_interrupts(vdev);
3488                         ibmvnic_handle_crq(crq, adapter);
3489                         crq->generic.first = 0;
3490                 } else {
3491                         /* remain in tasklet until all
3492                          * capabilities responses are received
3493                          */
3494                         if (!adapter->wait_capability)
3495                                 done = true;
3496                 }
3497         }
3498         /* if capabilities CRQ's were sent in this tasklet, the following
3499          * tasklet must wait until all responses are received
3500          */
3501         if (atomic_read(&adapter->running_cap_crqs) != 0)
3502                 adapter->wait_capability = true;
3503         spin_unlock_irqrestore(&queue->lock, flags);
3504 }
3505
3506 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3507 {
3508         struct vio_dev *vdev = adapter->vdev;
3509         int rc;
3510
3511         do {
3512                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3513         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3514
3515         if (rc)
3516                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3517
3518         return rc;
3519 }
3520
3521 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3522 {
3523         struct ibmvnic_crq_queue *crq = &adapter->crq;
3524         struct device *dev = &adapter->vdev->dev;
3525         struct vio_dev *vdev = adapter->vdev;
3526         int rc;
3527
3528         /* Close the CRQ */
3529         do {
3530                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3531         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3532
3533         /* Clean out the queue */
3534         memset(crq->msgs, 0, PAGE_SIZE);
3535         crq->cur = 0;
3536
3537         /* And re-open it again */
3538         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3539                                 crq->msg_token, PAGE_SIZE);
3540
3541         if (rc == H_CLOSED)
3542                 /* Adapter is good, but other end is not ready */
3543                 dev_warn(dev, "Partner adapter not ready\n");
3544         else if (rc != 0)
3545                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3546
3547         return rc;
3548 }
3549
3550 static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter)
3551 {
3552         struct ibmvnic_crq_queue *crq = &adapter->crq;
3553         struct vio_dev *vdev = adapter->vdev;
3554         long rc;
3555
3556         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3557         free_irq(vdev->irq, adapter);
3558         tasklet_kill(&adapter->tasklet);
3559         do {
3560                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3561         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3562
3563         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3564                          DMA_BIDIRECTIONAL);
3565         free_page((unsigned long)crq->msgs);
3566 }
3567
3568 static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter)
3569 {
3570         struct ibmvnic_crq_queue *crq = &adapter->crq;
3571         struct device *dev = &adapter->vdev->dev;
3572         struct vio_dev *vdev = adapter->vdev;
3573         int rc, retrc = -ENOMEM;
3574
3575         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3576         /* Should we allocate more than one page? */
3577
3578         if (!crq->msgs)
3579                 return -ENOMEM;
3580
3581         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3582         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3583                                         DMA_BIDIRECTIONAL);
3584         if (dma_mapping_error(dev, crq->msg_token))
3585                 goto map_failed;
3586
3587         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3588                                 crq->msg_token, PAGE_SIZE);
3589
3590         if (rc == H_RESOURCE)
3591                 /* maybe kexecing and resource is busy. try a reset */
3592                 rc = ibmvnic_reset_crq(adapter);
3593         retrc = rc;
3594
3595         if (rc == H_CLOSED) {
3596                 dev_warn(dev, "Partner adapter not ready\n");
3597         } else if (rc) {
3598                 dev_warn(dev, "Error %d opening adapter\n", rc);
3599                 goto reg_crq_failed;
3600         }
3601
3602         retrc = 0;
3603
3604         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3605                      (unsigned long)adapter);
3606
3607         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3608         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3609                          adapter);
3610         if (rc) {
3611                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3612                         vdev->irq, rc);
3613                 goto req_irq_failed;
3614         }
3615
3616         rc = vio_enable_interrupts(vdev);
3617         if (rc) {
3618                 dev_err(dev, "Error %d enabling interrupts\n", rc);
3619                 goto req_irq_failed;
3620         }
3621
3622         crq->cur = 0;
3623         spin_lock_init(&crq->lock);
3624
3625         return retrc;
3626
3627 req_irq_failed:
3628         tasklet_kill(&adapter->tasklet);
3629         do {
3630                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3631         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3632 reg_crq_failed:
3633         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3634 map_failed:
3635         free_page((unsigned long)crq->msgs);
3636         return retrc;
3637 }
3638
3639 /* debugfs for dump */
3640 static int ibmvnic_dump_show(struct seq_file *seq, void *v)
3641 {
3642         struct net_device *netdev = seq->private;
3643         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3644         struct device *dev = &adapter->vdev->dev;
3645         union ibmvnic_crq crq;
3646
3647         memset(&crq, 0, sizeof(crq));
3648         crq.request_dump_size.first = IBMVNIC_CRQ_CMD;
3649         crq.request_dump_size.cmd = REQUEST_DUMP_SIZE;
3650
3651         init_completion(&adapter->fw_done);
3652         ibmvnic_send_crq(adapter, &crq);
3653         wait_for_completion(&adapter->fw_done);
3654
3655         seq_write(seq, adapter->dump_data, adapter->dump_data_size);
3656
3657         dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size,
3658                          DMA_BIDIRECTIONAL);
3659
3660         kfree(adapter->dump_data);
3661
3662         return 0;
3663 }
3664
3665 static int ibmvnic_dump_open(struct inode *inode, struct file *file)
3666 {
3667         return single_open(file, ibmvnic_dump_show, inode->i_private);
3668 }
3669
3670 static const struct file_operations ibmvnic_dump_ops = {
3671         .owner          = THIS_MODULE,
3672         .open           = ibmvnic_dump_open,
3673         .read           = seq_read,
3674         .llseek         = seq_lseek,
3675         .release        = single_release,
3676 };
3677
3678 static void handle_crq_init_rsp(struct work_struct *work)
3679 {
3680         struct ibmvnic_adapter *adapter = container_of(work,
3681                                                        struct ibmvnic_adapter,
3682                                                        vnic_crq_init);
3683         struct device *dev = &adapter->vdev->dev;
3684         struct net_device *netdev = adapter->netdev;
3685         unsigned long timeout = msecs_to_jiffies(30000);
3686         bool restart = false;
3687         int rc;
3688
3689         if (adapter->failover) {
3690                 release_sub_crqs(adapter);
3691                 if (netif_running(netdev)) {
3692                         netif_tx_disable(netdev);
3693                         ibmvnic_close(netdev);
3694                         restart = true;
3695                 }
3696         }
3697
3698         reinit_completion(&adapter->init_done);
3699         send_version_xchg(adapter);
3700         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3701                 dev_err(dev, "Passive init timeout\n");
3702                 goto task_failed;
3703         }
3704
3705         do {
3706                 if (adapter->renegotiate) {
3707                         adapter->renegotiate = false;
3708                         release_sub_crqs_no_irqs(adapter);
3709
3710                         reinit_completion(&adapter->init_done);
3711                         send_cap_queries(adapter);
3712                         if (!wait_for_completion_timeout(&adapter->init_done,
3713                                                          timeout)) {
3714                                 dev_err(dev, "Passive init timeout\n");
3715                                 goto task_failed;
3716                         }
3717                 }
3718         } while (adapter->renegotiate);
3719         rc = init_sub_crq_irqs(adapter);
3720
3721         if (rc)
3722                 goto task_failed;
3723
3724         netdev->real_num_tx_queues = adapter->req_tx_queues;
3725         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3726
3727         if (adapter->failover) {
3728                 adapter->failover = false;
3729                 if (restart) {
3730                         rc = ibmvnic_open(netdev);
3731                         if (rc)
3732                                 goto restart_failed;
3733                 }
3734                 netif_carrier_on(netdev);
3735                 return;
3736         }
3737
3738         rc = register_netdev(netdev);
3739         if (rc) {
3740                 dev_err(dev,
3741                         "failed to register netdev rc=%d\n", rc);
3742                 goto register_failed;
3743         }
3744         dev_info(dev, "ibmvnic registered\n");
3745
3746         return;
3747
3748 restart_failed:
3749         dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc);
3750 register_failed:
3751         release_sub_crqs(adapter);
3752 task_failed:
3753         dev_err(dev, "Passive initialization was not successful\n");
3754 }
3755
3756 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3757 {
3758         unsigned long timeout = msecs_to_jiffies(30000);
3759         struct ibmvnic_adapter *adapter;
3760         struct net_device *netdev;
3761         unsigned char *mac_addr_p;
3762         struct dentry *ent;
3763         char buf[17]; /* debugfs name buf */
3764         int rc;
3765
3766         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3767                 dev->unit_address);
3768
3769         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3770                                                         VETH_MAC_ADDR, NULL);
3771         if (!mac_addr_p) {
3772                 dev_err(&dev->dev,
3773                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3774                         __FILE__, __LINE__);
3775                 return 0;
3776         }
3777
3778         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3779                                    IBMVNIC_MAX_TX_QUEUES);
3780         if (!netdev)
3781                 return -ENOMEM;
3782
3783         adapter = netdev_priv(netdev);
3784         dev_set_drvdata(&dev->dev, netdev);
3785         adapter->vdev = dev;
3786         adapter->netdev = netdev;
3787         adapter->failover = false;
3788
3789         ether_addr_copy(adapter->mac_addr, mac_addr_p);
3790         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3791         netdev->irq = dev->irq;
3792         netdev->netdev_ops = &ibmvnic_netdev_ops;
3793         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3794         SET_NETDEV_DEV(netdev, &dev->dev);
3795
3796         INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp);
3797         INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event);
3798
3799         spin_lock_init(&adapter->stats_lock);
3800
3801         rc = ibmvnic_init_crq_queue(adapter);
3802         if (rc) {
3803                 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc);
3804                 goto free_netdev;
3805         }
3806
3807         INIT_LIST_HEAD(&adapter->errors);
3808         INIT_LIST_HEAD(&adapter->inflight);
3809         spin_lock_init(&adapter->error_list_lock);
3810         spin_lock_init(&adapter->inflight_lock);
3811
3812         adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats,
3813                                               sizeof(struct ibmvnic_statistics),
3814                                               DMA_FROM_DEVICE);
3815         if (dma_mapping_error(&dev->dev, adapter->stats_token)) {
3816                 if (!firmware_has_feature(FW_FEATURE_CMO))
3817                         dev_err(&dev->dev, "Couldn't map stats buffer\n");
3818                 rc = -ENOMEM;
3819                 goto free_crq;
3820         }
3821
3822         snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address);
3823         ent = debugfs_create_dir(buf, NULL);
3824         if (!ent || IS_ERR(ent)) {
3825                 dev_info(&dev->dev, "debugfs create directory failed\n");
3826                 adapter->debugfs_dir = NULL;
3827         } else {
3828                 adapter->debugfs_dir = ent;
3829                 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir,
3830                                           netdev, &ibmvnic_dump_ops);
3831                 if (!ent || IS_ERR(ent)) {
3832                         dev_info(&dev->dev,
3833                                  "debugfs create dump file failed\n");
3834                         adapter->debugfs_dump = NULL;
3835                 } else {
3836                         adapter->debugfs_dump = ent;
3837                 }
3838         }
3839
3840         init_completion(&adapter->init_done);
3841         ibmvnic_send_crq_init(adapter);
3842         if (!wait_for_completion_timeout(&adapter->init_done, timeout))
3843                 return 0;
3844
3845         do {
3846                 if (adapter->renegotiate) {
3847                         adapter->renegotiate = false;
3848                         release_sub_crqs_no_irqs(adapter);
3849
3850                         reinit_completion(&adapter->init_done);
3851                         send_cap_queries(adapter);
3852                         if (!wait_for_completion_timeout(&adapter->init_done,
3853                                                          timeout))
3854                                 return 0;
3855                 }
3856         } while (adapter->renegotiate);
3857
3858         rc = init_sub_crq_irqs(adapter);
3859         if (rc) {
3860                 dev_err(&dev->dev, "failed to initialize sub crq irqs\n");
3861                 goto free_debugfs;
3862         }
3863
3864         netdev->real_num_tx_queues = adapter->req_tx_queues;
3865         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3866
3867         rc = register_netdev(netdev);
3868         if (rc) {
3869                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3870                 goto free_sub_crqs;
3871         }
3872         dev_info(&dev->dev, "ibmvnic registered\n");
3873
3874         return 0;
3875
3876 free_sub_crqs:
3877         release_sub_crqs(adapter);
3878 free_debugfs:
3879         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3880                 debugfs_remove_recursive(adapter->debugfs_dir);
3881 free_crq:
3882         ibmvnic_release_crq_queue(adapter);
3883 free_netdev:
3884         free_netdev(netdev);
3885         return rc;
3886 }
3887
3888 static int ibmvnic_remove(struct vio_dev *dev)
3889 {
3890         struct net_device *netdev = dev_get_drvdata(&dev->dev);
3891         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3892
3893         unregister_netdev(netdev);
3894
3895         release_sub_crqs(adapter);
3896
3897         ibmvnic_release_crq_queue(adapter);
3898
3899         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3900                 debugfs_remove_recursive(adapter->debugfs_dir);
3901
3902         dma_unmap_single(&dev->dev, adapter->stats_token,
3903                          sizeof(struct ibmvnic_statistics), DMA_FROM_DEVICE);
3904
3905         if (adapter->ras_comps)
3906                 dma_free_coherent(&dev->dev,
3907                                   adapter->ras_comp_num *
3908                                   sizeof(struct ibmvnic_fw_component),
3909                                   adapter->ras_comps, adapter->ras_comps_tok);
3910
3911         kfree(adapter->ras_comp_int);
3912
3913         free_netdev(netdev);
3914         dev_set_drvdata(&dev->dev, NULL);
3915
3916         return 0;
3917 }
3918
3919 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3920 {
3921         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3922         struct ibmvnic_adapter *adapter;
3923         struct iommu_table *tbl;
3924         unsigned long ret = 0;
3925         int i;
3926
3927         tbl = get_iommu_table_base(&vdev->dev);
3928
3929         /* netdev inits at probe time along with the structures we need below*/
3930         if (!netdev)
3931                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3932
3933         adapter = netdev_priv(netdev);
3934
3935         ret += PAGE_SIZE; /* the crq message queue */
3936         ret += adapter->bounce_buffer_size;
3937         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3938
3939         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3940                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3941
3942         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3943              i++)
3944                 ret += adapter->rx_pool[i].size *
3945                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3946
3947         return ret;
3948 }
3949
3950 static int ibmvnic_resume(struct device *dev)
3951 {
3952         struct net_device *netdev = dev_get_drvdata(dev);
3953         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3954         int i;
3955
3956         /* kick the interrupt handlers just in case we lost an interrupt */
3957         for (i = 0; i < adapter->req_rx_queues; i++)
3958                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3959                                      adapter->rx_scrq[i]);
3960
3961         return 0;
3962 }
3963
3964 static struct vio_device_id ibmvnic_device_table[] = {
3965         {"network", "IBM,vnic"},
3966         {"", "" }
3967 };
3968 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3969
3970 static const struct dev_pm_ops ibmvnic_pm_ops = {
3971         .resume = ibmvnic_resume
3972 };
3973
3974 static struct vio_driver ibmvnic_driver = {
3975         .id_table       = ibmvnic_device_table,
3976         .probe          = ibmvnic_probe,
3977         .remove         = ibmvnic_remove,
3978         .get_desired_dma = ibmvnic_get_desired_dma,
3979         .name           = ibmvnic_driver_name,
3980         .pm             = &ibmvnic_pm_ops,
3981 };
3982
3983 /* module functions */
3984 static int __init ibmvnic_module_init(void)
3985 {
3986         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3987                 IBMVNIC_DRIVER_VERSION);
3988
3989         return vio_register_driver(&ibmvnic_driver);
3990 }
3991
3992 static void __exit ibmvnic_module_exit(void)
3993 {
3994         vio_unregister_driver(&ibmvnic_driver);
3995 }
3996
3997 module_init(ibmvnic_module_init);
3998 module_exit(ibmvnic_module_exit);