drivers/net/ethernet/ibm/ibmvnic.c

   1 /**************************************************************************/
   2 /*                                                                        */
   3 /*  IBM System i and System p Virtual NIC Device Driver                   */
   4 /*  Copyright (C) 2014 IBM Corp.                                          */
   5 /*  Santiago Leon (santi_leon@yahoo.com)                                  */
   6 /*  Thomas Falcon (tlfalcon@linux.vnet.ibm.com)                           */
   7 /*  John Allen (jallen@linux.vnet.ibm.com)                                */
   8 /*                                                                        */
   9 /*  This program is free software; you can redistribute it and/or modify  */
  10 /*  it under the terms of the GNU General Public License as published by  */
  11 /*  the Free Software Foundation; either version 2 of the License, or     */
  12 /*  (at your option) any later version.                                   */
  13 /*                                                                        */
  14 /*  This program is distributed in the hope that it will be useful,       */
  15 /*  but WITHOUT ANY WARRANTY; without even the implied warranty of        */
  16 /*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         */
  17 /*  GNU General Public License for more details.                          */
  18 /*                                                                        */
  19 /*  You should have received a copy of the GNU General Public License     */
  20 /*  along with this program.                                              */
  21 /*                                                                        */
  22 /* This module contains the implementation of a virtual ethernet device   */
  23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN    */
  24 /* option of the RS/6000 Platform Architecture to interface with virtual  */
  25 /* ethernet NICs that are presented to the partition by the hypervisor.   */
  26 /*                                                                         */
  27 /* Messages are passed between the VNIC driver and the VNIC server using  */
  28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to  */
  29 /* issue and receive commands that initiate communication with the server */
  30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but    */
  31 /* are used by the driver to notify the server that a packet is           */
  32 /* ready for transmission or that a buffer has been added to receive a    */
  33 /* packet. Subsequently, sCRQs are used by the server to notify the       */
  34 /* driver that a packet transmission has been completed or that a packet  */
  35 /* has been received and placed in a waiting buffer.                      */
  36 /*                                                                        */
  37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in    */
  38 /* which skbs are DMA mapped and immediately unmapped when the transmit   */
  39 /* or receive has been completed, the VNIC driver is required to use      */
  40 /* "long term mapping". This entails that large, continuous DMA mapped    */
  41 /* buffers are allocated on driver initialization and these buffers are   */
  42 /* then continuously reused to pass skbs to and from the VNIC server.     */
  43 /*                                                                        */
  44 /**************************************************************************/
  45
  46 #include <linux/module.h>
  47 #include <linux/moduleparam.h>
  48 #include <linux/types.h>
  49 #include <linux/errno.h>
  50 #include <linux/completion.h>
  51 #include <linux/ioport.h>
  52 #include <linux/dma-mapping.h>
  53 #include <linux/kernel.h>
  54 #include <linux/netdevice.h>
  55 #include <linux/etherdevice.h>
  56 #include <linux/skbuff.h>
  57 #include <linux/init.h>
  58 #include <linux/delay.h>
  59 #include <linux/mm.h>
  60 #include <linux/ethtool.h>
  61 #include <linux/proc_fs.h>
  62 #include <linux/in.h>
  63 #include <linux/ip.h>
  64 #include <linux/ipv6.h>
  65 #include <linux/irq.h>
  66 #include <linux/kthread.h>
  67 #include <linux/seq_file.h>
  68 #include <linux/interrupt.h>
  69 #include <net/net_namespace.h>
  70 #include <asm/hvcall.h>
  71 #include <linux/atomic.h>
  72 #include <asm/vio.h>
  73 #include <asm/iommu.h>
  74 #include <linux/uaccess.h>
  75 #include <asm/firmware.h>
  76 #include <linux/workqueue.h>
  77 #include <linux/if_vlan.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");
  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 int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  93 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  94 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  95 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  96 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  97                        union sub_crq *sub_crq);
  98 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
  99 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
 100 static int enable_scrq_irq(struct ibmvnic_adapter *,
 101                            struct ibmvnic_sub_crq_queue *);
 102 static int disable_scrq_irq(struct ibmvnic_adapter *,
 103                             struct ibmvnic_sub_crq_queue *);
 104 static int pending_scrq(struct ibmvnic_adapter *,
 105                         struct ibmvnic_sub_crq_queue *);
 106 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
 107                                         struct ibmvnic_sub_crq_queue *);
 108 static int ibmvnic_poll(struct napi_struct *napi, int data);
 109 static void send_map_query(struct ibmvnic_adapter *adapter);
 110 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 111 static void send_request_unmap(struct ibmvnic_adapter *, u8);
 112 static void send_login(struct ibmvnic_adapter *adapter);
 113 static void send_cap_queries(struct ibmvnic_adapter *adapter);
 114 static int init_sub_crqs(struct ibmvnic_adapter *);
 115 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
 116 static int ibmvnic_init(struct ibmvnic_adapter *);
 117 static void release_crq_queue(struct ibmvnic_adapter *);
 118
 119 struct ibmvnic_stat {
 120         char name[ETH_GSTRING_LEN];
 121         int offset;
 122 };
 123
 124 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 125                              offsetof(struct ibmvnic_statistics, stat))
 126 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 127
 128 static const struct ibmvnic_stat ibmvnic_stats[] = {
 129         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 130         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 131         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 132         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 133         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 134         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 135         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 136         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 137         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 138         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 139         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 140         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 141         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 142         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 143         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 144         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 145         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 146         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 147         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 148         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 149         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 150         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 151 };
 152
 153 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 154                           unsigned long length, unsigned long *number,
 155                           unsigned long *irq)
 156 {
 157         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 158         long rc;
 159
 160         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 161         *number = retbuf[0];
 162         *irq = retbuf[1];
 163
 164         return rc;
 165 }
 166
 167 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 168                                 struct ibmvnic_long_term_buff *ltb, int size)
 169 {
 170         struct device *dev = &adapter->vdev->dev;
 171
 172         ltb->size = size;
 173         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 174                                        GFP_KERNEL);
 175
 176         if (!ltb->buff) {
 177                 dev_err(dev, "Couldn't alloc long term buffer\n");
 178                 return -ENOMEM;
 179         }
 180         ltb->map_id = adapter->map_id;
 181         adapter->map_id++;
 182
 183         init_completion(&adapter->fw_done);
 184         send_request_map(adapter, ltb->addr,
 185                          ltb->size, ltb->map_id);
 186         wait_for_completion(&adapter->fw_done);
 187
 188         if (adapter->fw_done_rc) {
 189                 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
 190                         adapter->fw_done_rc);
 191                 return -1;
 192         }
 193         return 0;
 194 }
 195
 196 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 197                                 struct ibmvnic_long_term_buff *ltb)
 198 {
 199         struct device *dev = &adapter->vdev->dev;
 200
 201         if (!ltb->buff)
 202                 return;
 203
 204         if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
 205             adapter->reset_reason != VNIC_RESET_MOBILITY)
 206                 send_request_unmap(adapter, ltb->map_id);
 207         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 208 }
 209
 210 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
 211                                 struct ibmvnic_long_term_buff *ltb)
 212 {
 213         memset(ltb->buff, 0, ltb->size);
 214
 215         init_completion(&adapter->fw_done);
 216         send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
 217         wait_for_completion(&adapter->fw_done);
 218
 219         if (adapter->fw_done_rc) {
 220                 dev_info(&adapter->vdev->dev,
 221                          "Reset failed, attempting to free and reallocate buffer\n");
 222                 free_long_term_buff(adapter, ltb);
 223                 return alloc_long_term_buff(adapter, ltb, ltb->size);
 224         }
 225         return 0;
 226 }
 227
 228 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
 229 {
 230         int i;
 231
 232         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 233              i++)
 234                 adapter->rx_pool[i].active = 0;
 235 }
 236
 237 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 238                               struct ibmvnic_rx_pool *pool)
 239 {
 240         int count = pool->size - atomic_read(&pool->available);
 241         struct device *dev = &adapter->vdev->dev;
 242         int buffers_added = 0;
 243         unsigned long lpar_rc;
 244         union sub_crq sub_crq;
 245         struct sk_buff *skb;
 246         unsigned int offset;
 247         dma_addr_t dma_addr;
 248         unsigned char *dst;
 249         u64 *handle_array;
 250         int shift = 0;
 251         int index;
 252         int i;
 253
 254         if (!pool->active)
 255                 return;
 256
 257         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 258                                       be32_to_cpu(adapter->login_rsp_buf->
 259                                       off_rxadd_subcrqs));
 260
 261         for (i = 0; i < count; ++i) {
 262                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 263                 if (!skb) {
 264                         dev_err(dev, "Couldn't replenish rx buff\n");
 265                         adapter->replenish_no_mem++;
 266                         break;
 267                 }
 268
 269                 index = pool->free_map[pool->next_free];
 270
 271                 if (pool->rx_buff[index].skb)
 272                         dev_err(dev, "Inconsistent free_map!\n");
 273
 274                 /* Copy the skb to the long term mapped DMA buffer */
 275                 offset = index * pool->buff_size;
 276                 dst = pool->long_term_buff.buff + offset;
 277                 memset(dst, 0, pool->buff_size);
 278                 dma_addr = pool->long_term_buff.addr + offset;
 279                 pool->rx_buff[index].data = dst;
 280
 281                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 282                 pool->rx_buff[index].dma = dma_addr;
 283                 pool->rx_buff[index].skb = skb;
 284                 pool->rx_buff[index].pool_index = pool->index;
 285                 pool->rx_buff[index].size = pool->buff_size;
 286
 287                 memset(&sub_crq, 0, sizeof(sub_crq));
 288                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 289                 sub_crq.rx_add.correlator =
 290                     cpu_to_be64((u64)&pool->rx_buff[index]);
 291                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 292                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 293
 294                 /* The length field of the sCRQ is defined to be 24 bits so the
 295                  * buffer size needs to be left shifted by a byte before it is
 296                  * converted to big endian to prevent the last byte from being
 297                  * truncated.
 298                  */
 299 #ifdef __LITTLE_ENDIAN__
 300                 shift = 8;
 301 #endif
 302                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 303
 304                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 305                                       &sub_crq);
 306                 if (lpar_rc != H_SUCCESS)
 307                         goto failure;
 308
 309                 buffers_added++;
 310                 adapter->replenish_add_buff_success++;
 311                 pool->next_free = (pool->next_free + 1) % pool->size;
 312         }
 313         atomic_add(buffers_added, &pool->available);
 314         return;
 315
 316 failure:
 317         dev_info(dev, "replenish pools failure\n");
 318         pool->free_map[pool->next_free] = index;
 319         pool->rx_buff[index].skb = NULL;
 320         if (!dma_mapping_error(dev, dma_addr))
 321                 dma_unmap_single(dev, dma_addr, pool->buff_size,
 322                                  DMA_FROM_DEVICE);
 323
 324         dev_kfree_skb_any(skb);
 325         adapter->replenish_add_buff_failure++;
 326         atomic_add(buffers_added, &pool->available);
 327
 328         if (lpar_rc == H_CLOSED) {
 329                 /* Disable buffer pool replenishment and report carrier off if
 330                  * queue is closed. Firmware guarantees that a signal will
 331                  * be sent to the driver, triggering a reset.
 332                  */
 333                 deactivate_rx_pools(adapter);
 334                 netif_carrier_off(adapter->netdev);
 335         }
 336 }
 337
 338 static void replenish_pools(struct ibmvnic_adapter *adapter)
 339 {
 340         int i;
 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 release_stats_token(struct ibmvnic_adapter *adapter)
 351 {
 352         struct device *dev = &adapter->vdev->dev;
 353
 354         if (!adapter->stats_token)
 355                 return;
 356
 357         dma_unmap_single(dev, adapter->stats_token,
 358                          sizeof(struct ibmvnic_statistics),
 359                          DMA_FROM_DEVICE);
 360         adapter->stats_token = 0;
 361 }
 362
 363 static int init_stats_token(struct ibmvnic_adapter *adapter)
 364 {
 365         struct device *dev = &adapter->vdev->dev;
 366         dma_addr_t stok;
 367
 368         stok = dma_map_single(dev, &adapter->stats,
 369                               sizeof(struct ibmvnic_statistics),
 370                               DMA_FROM_DEVICE);
 371         if (dma_mapping_error(dev, stok)) {
 372                 dev_err(dev, "Couldn't map stats buffer\n");
 373                 return -1;
 374         }
 375
 376         adapter->stats_token = stok;
 377         return 0;
 378 }
 379
 380 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
 381 {
 382         struct ibmvnic_rx_pool *rx_pool;
 383         int rx_scrqs;
 384         int i, j, rc;
 385
 386         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 387         for (i = 0; i < rx_scrqs; i++) {
 388                 rx_pool = &adapter->rx_pool[i];
 389
 390                 rc = reset_long_term_buff(adapter, &rx_pool->long_term_buff);
 391                 if (rc)
 392                         return rc;
 393
 394                 for (j = 0; j < rx_pool->size; j++)
 395                         rx_pool->free_map[j] = j;
 396
 397                 memset(rx_pool->rx_buff, 0,
 398                        rx_pool->size * sizeof(struct ibmvnic_rx_buff));
 399
 400                 atomic_set(&rx_pool->available, 0);
 401                 rx_pool->next_alloc = 0;
 402                 rx_pool->next_free = 0;
 403                 rx_pool->active = 1;
 404         }
 405
 406         return 0;
 407 }
 408
 409 static void release_rx_pools(struct ibmvnic_adapter *adapter)
 410 {
 411         struct ibmvnic_rx_pool *rx_pool;
 412         int rx_scrqs;
 413         int i, j;
 414
 415         if (!adapter->rx_pool)
 416                 return;
 417
 418         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 419         for (i = 0; i < rx_scrqs; i++) {
 420                 rx_pool = &adapter->rx_pool[i];
 421
 422                 kfree(rx_pool->free_map);
 423                 free_long_term_buff(adapter, &rx_pool->long_term_buff);
 424
 425                 if (!rx_pool->rx_buff)
 426                         continue;
 427
 428                 for (j = 0; j < rx_pool->size; j++) {
 429                         if (rx_pool->rx_buff[j].skb) {
 430                                 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
 431                                 rx_pool->rx_buff[i].skb = NULL;
 432                         }
 433                 }
 434
 435                 kfree(rx_pool->rx_buff);
 436         }
 437
 438         kfree(adapter->rx_pool);
 439         adapter->rx_pool = NULL;
 440 }
 441
 442 static int init_rx_pools(struct net_device *netdev)
 443 {
 444         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 445         struct device *dev = &adapter->vdev->dev;
 446         struct ibmvnic_rx_pool *rx_pool;
 447         int rxadd_subcrqs;
 448         u64 *size_array;
 449         int i, j;
 450
 451         rxadd_subcrqs =
 452                 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 453         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 454                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 455
 456         adapter->rx_pool = kcalloc(rxadd_subcrqs,
 457                                    sizeof(struct ibmvnic_rx_pool),
 458                                    GFP_KERNEL);
 459         if (!adapter->rx_pool) {
 460                 dev_err(dev, "Failed to allocate rx pools\n");
 461                 return -1;
 462         }
 463
 464         for (i = 0; i < rxadd_subcrqs; i++) {
 465                 rx_pool = &adapter->rx_pool[i];
 466
 467                 netdev_dbg(adapter->netdev,
 468                            "Initializing rx_pool %d, %lld buffs, %lld bytes each\n",
 469                            i, adapter->req_rx_add_entries_per_subcrq,
 470                            be64_to_cpu(size_array[i]));
 471
 472                 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
 473                 rx_pool->index = i;
 474                 rx_pool->buff_size = be64_to_cpu(size_array[i]);
 475                 rx_pool->active = 1;
 476
 477                 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
 478                                             GFP_KERNEL);
 479                 if (!rx_pool->free_map) {
 480                         release_rx_pools(adapter);
 481                         return -1;
 482                 }
 483
 484                 rx_pool->rx_buff = kcalloc(rx_pool->size,
 485                                            sizeof(struct ibmvnic_rx_buff),
 486                                            GFP_KERNEL);
 487                 if (!rx_pool->rx_buff) {
 488                         dev_err(dev, "Couldn't alloc rx buffers\n");
 489                         release_rx_pools(adapter);
 490                         return -1;
 491                 }
 492
 493                 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 494                                          rx_pool->size * rx_pool->buff_size)) {
 495                         release_rx_pools(adapter);
 496                         return -1;
 497                 }
 498
 499                 for (j = 0; j < rx_pool->size; ++j)
 500                         rx_pool->free_map[j] = j;
 501
 502                 atomic_set(&rx_pool->available, 0);
 503                 rx_pool->next_alloc = 0;
 504                 rx_pool->next_free = 0;
 505         }
 506
 507         return 0;
 508 }
 509
 510 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
 511 {
 512         struct ibmvnic_tx_pool *tx_pool;
 513         int tx_scrqs;
 514         int i, j, rc;
 515
 516         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 517         for (i = 0; i < tx_scrqs; i++) {
 518                 tx_pool = &adapter->tx_pool[i];
 519
 520                 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
 521                 if (rc)
 522                         return rc;
 523
 524                 memset(tx_pool->tx_buff, 0,
 525                        adapter->req_tx_entries_per_subcrq *
 526                        sizeof(struct ibmvnic_tx_buff));
 527
 528                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 529                         tx_pool->free_map[j] = j;
 530
 531                 tx_pool->consumer_index = 0;
 532                 tx_pool->producer_index = 0;
 533         }
 534
 535         return 0;
 536 }
 537
 538 static void release_tx_pools(struct ibmvnic_adapter *adapter)
 539 {
 540         struct ibmvnic_tx_pool *tx_pool;
 541         int i, tx_scrqs;
 542
 543         if (!adapter->tx_pool)
 544                 return;
 545
 546         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 547         for (i = 0; i < tx_scrqs; i++) {
 548                 tx_pool = &adapter->tx_pool[i];
 549                 kfree(tx_pool->tx_buff);
 550                 free_long_term_buff(adapter, &tx_pool->long_term_buff);
 551                 kfree(tx_pool->free_map);
 552         }
 553
 554         kfree(adapter->tx_pool);
 555         adapter->tx_pool = NULL;
 556 }
 557
 558 static int init_tx_pools(struct net_device *netdev)
 559 {
 560         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 561         struct device *dev = &adapter->vdev->dev;
 562         struct ibmvnic_tx_pool *tx_pool;
 563         int tx_subcrqs;
 564         int i, j;
 565
 566         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 567         adapter->tx_pool = kcalloc(tx_subcrqs,
 568                                    sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 569         if (!adapter->tx_pool)
 570                 return -1;
 571
 572         for (i = 0; i < tx_subcrqs; i++) {
 573                 tx_pool = &adapter->tx_pool[i];
 574                 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
 575                                            sizeof(struct ibmvnic_tx_buff),
 576                                            GFP_KERNEL);
 577                 if (!tx_pool->tx_buff) {
 578                         dev_err(dev, "tx pool buffer allocation failed\n");
 579                         release_tx_pools(adapter);
 580                         return -1;
 581                 }
 582
 583                 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 584                                          adapter->req_tx_entries_per_subcrq *
 585                                          adapter->req_mtu)) {
 586                         release_tx_pools(adapter);
 587                         return -1;
 588                 }
 589
 590                 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
 591                                             sizeof(int), GFP_KERNEL);
 592                 if (!tx_pool->free_map) {
 593                         release_tx_pools(adapter);
 594                         return -1;
 595                 }
 596
 597                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 598                         tx_pool->free_map[j] = j;
 599
 600                 tx_pool->consumer_index = 0;
 601                 tx_pool->producer_index = 0;
 602         }
 603
 604         return 0;
 605 }
 606
 607 static void release_error_buffers(struct ibmvnic_adapter *adapter)
 608 {
 609         struct device *dev = &adapter->vdev->dev;
 610         struct ibmvnic_error_buff *error_buff, *tmp;
 611         unsigned long flags;
 612
 613         spin_lock_irqsave(&adapter->error_list_lock, flags);
 614         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
 615                 list_del(&error_buff->list);
 616                 dma_unmap_single(dev, error_buff->dma, error_buff->len,
 617                                  DMA_FROM_DEVICE);
 618                 kfree(error_buff->buff);
 619                 kfree(error_buff);
 620         }
 621         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
 622 }
 623
 624 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
 625 {
 626         int i;
 627
 628         if (adapter->napi_enabled)
 629                 return;
 630
 631         for (i = 0; i < adapter->req_rx_queues; i++)
 632                 napi_enable(&adapter->napi[i]);
 633
 634         adapter->napi_enabled = true;
 635 }
 636
 637 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
 638 {
 639         int i;
 640
 641         if (!adapter->napi_enabled)
 642                 return;
 643
 644         for (i = 0; i < adapter->req_rx_queues; i++)
 645                 napi_disable(&adapter->napi[i]);
 646
 647         adapter->napi_enabled = false;
 648 }
 649
 650 static int ibmvnic_login(struct net_device *netdev)
 651 {
 652         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 653         unsigned long timeout = msecs_to_jiffies(30000);
 654         struct device *dev = &adapter->vdev->dev;
 655         int rc;
 656
 657         do {
 658                 if (adapter->renegotiate) {
 659                         adapter->renegotiate = false;
 660                         release_sub_crqs(adapter);
 661
 662                         reinit_completion(&adapter->init_done);
 663                         send_cap_queries(adapter);
 664                         if (!wait_for_completion_timeout(&adapter->init_done,
 665                                                          timeout)) {
 666                                 dev_err(dev, "Capabilities query timeout\n");
 667                                 return -1;
 668                         }
 669                         rc = init_sub_crqs(adapter);
 670                         if (rc) {
 671                                 dev_err(dev,
 672                                         "Initialization of SCRQ's failed\n");
 673                                 return -1;
 674                         }
 675                         rc = init_sub_crq_irqs(adapter);
 676                         if (rc) {
 677                                 dev_err(dev,
 678                                         "Initialization of SCRQ's irqs failed\n");
 679                                 return -1;
 680                         }
 681                 }
 682
 683                 reinit_completion(&adapter->init_done);
 684                 send_login(adapter);
 685                 if (!wait_for_completion_timeout(&adapter->init_done,
 686                                                  timeout)) {
 687                         dev_err(dev, "Login timeout\n");
 688                         return -1;
 689                 }
 690         } while (adapter->renegotiate);
 691
 692         return 0;
 693 }
 694
 695 static void release_resources(struct ibmvnic_adapter *adapter)
 696 {
 697         int i;
 698
 699         release_tx_pools(adapter);
 700         release_rx_pools(adapter);
 701
 702         release_stats_token(adapter);
 703         release_error_buffers(adapter);
 704
 705         if (adapter->napi) {
 706                 for (i = 0; i < adapter->req_rx_queues; i++) {
 707                         if (&adapter->napi[i])
 708                                 netif_napi_del(&adapter->napi[i]);
 709                 }
 710         }
 711 }
 712
 713 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
 714 {
 715         struct net_device *netdev = adapter->netdev;
 716         unsigned long timeout = msecs_to_jiffies(30000);
 717         union ibmvnic_crq crq;
 718         bool resend;
 719         int rc;
 720
 721         netdev_err(netdev, "setting link state %d\n", link_state);
 722         memset(&crq, 0, sizeof(crq));
 723         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 724         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 725         crq.logical_link_state.link_state = link_state;
 726
 727         do {
 728                 resend = false;
 729
 730                 reinit_completion(&adapter->init_done);
 731                 rc = ibmvnic_send_crq(adapter, &crq);
 732                 if (rc) {
 733                         netdev_err(netdev, "Failed to set link state\n");
 734                         return rc;
 735                 }
 736
 737                 if (!wait_for_completion_timeout(&adapter->init_done,
 738                                                  timeout)) {
 739                         netdev_err(netdev, "timeout setting link state\n");
 740                         return -1;
 741                 }
 742
 743                 if (adapter->init_done_rc == 1) {
 744                         /* Partuial success, delay and re-send */
 745                         mdelay(1000);
 746                         resend = true;
 747                 }
 748         } while (resend);
 749
 750         return 0;
 751 }
 752
 753 static int set_real_num_queues(struct net_device *netdev)
 754 {
 755         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 756         int rc;
 757
 758         rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
 759         if (rc) {
 760                 netdev_err(netdev, "failed to set the number of tx queues\n");
 761                 return rc;
 762         }
 763
 764         rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
 765         if (rc)
 766                 netdev_err(netdev, "failed to set the number of rx queues\n");
 767
 768         return rc;
 769 }
 770
 771 static int init_resources(struct ibmvnic_adapter *adapter)
 772 {
 773         struct net_device *netdev = adapter->netdev;
 774         int i, rc;
 775
 776         rc = set_real_num_queues(netdev);
 777         if (rc)
 778                 return rc;
 779
 780         rc = init_stats_token(adapter);
 781         if (rc)
 782                 return rc;
 783
 784         adapter->map_id = 1;
 785         adapter->napi = kcalloc(adapter->req_rx_queues,
 786                                 sizeof(struct napi_struct), GFP_KERNEL);
 787         if (!adapter->napi)
 788                 return -ENOMEM;
 789
 790         for (i = 0; i < adapter->req_rx_queues; i++) {
 791                 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
 792                                NAPI_POLL_WEIGHT);
 793         }
 794
 795         send_map_query(adapter);
 796
 797         rc = init_rx_pools(netdev);
 798         if (rc)
 799                 return rc;
 800
 801         rc = init_tx_pools(netdev);
 802         return rc;
 803 }
 804
 805 static int __ibmvnic_open(struct net_device *netdev)
 806 {
 807         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 808         enum vnic_state prev_state = adapter->state;
 809         int i, rc;
 810
 811         adapter->state = VNIC_OPENING;
 812         replenish_pools(adapter);
 813         ibmvnic_napi_enable(adapter);
 814
 815         /* We're ready to receive frames, enable the sub-crq interrupts and
 816          * set the logical link state to up
 817          */
 818         for (i = 0; i < adapter->req_rx_queues; i++) {
 819                 if (prev_state == VNIC_CLOSED)
 820                         enable_irq(adapter->rx_scrq[i]->irq);
 821                 else
 822                         enable_scrq_irq(adapter, adapter->rx_scrq[i]);
 823         }
 824
 825         for (i = 0; i < adapter->req_tx_queues; i++) {
 826                 if (prev_state == VNIC_CLOSED)
 827                         enable_irq(adapter->tx_scrq[i]->irq);
 828                 else
 829                         enable_scrq_irq(adapter, adapter->tx_scrq[i]);
 830         }
 831
 832         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
 833         if (rc) {
 834                 for (i = 0; i < adapter->req_rx_queues; i++)
 835                         napi_disable(&adapter->napi[i]);
 836                 release_resources(adapter);
 837                 return rc;
 838         }
 839
 840         netif_tx_start_all_queues(netdev);
 841
 842         if (prev_state == VNIC_CLOSED) {
 843                 for (i = 0; i < adapter->req_rx_queues; i++)
 844                         napi_schedule(&adapter->napi[i]);
 845         }
 846
 847         adapter->state = VNIC_OPEN;
 848         return rc;
 849 }
 850
 851 static int ibmvnic_open(struct net_device *netdev)
 852 {
 853         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 854         int rc;
 855
 856         mutex_lock(&adapter->reset_lock);
 857
 858         if (adapter->state != VNIC_CLOSED) {
 859                 rc = ibmvnic_login(netdev);
 860                 if (rc) {
 861                         mutex_unlock(&adapter->reset_lock);
 862                         return rc;
 863                 }
 864
 865                 rc = init_resources(adapter);
 866                 if (rc) {
 867                         netdev_err(netdev, "failed to initialize resources\n");
 868                         release_resources(adapter);
 869                         mutex_unlock(&adapter->reset_lock);
 870                         return rc;
 871                 }
 872         }
 873
 874         rc = __ibmvnic_open(netdev);
 875         mutex_unlock(&adapter->reset_lock);
 876
 877         return rc;
 878 }
 879
 880 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
 881 {
 882         struct ibmvnic_tx_pool *tx_pool;
 883         u64 tx_entries;
 884         int tx_scrqs;
 885         int i, j;
 886
 887         if (!adapter->tx_pool)
 888                 return;
 889
 890         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 891         tx_entries = adapter->req_tx_entries_per_subcrq;
 892
 893         /* Free any remaining skbs in the tx buffer pools */
 894         for (i = 0; i < tx_scrqs; i++) {
 895                 tx_pool = &adapter->tx_pool[i];
 896                 if (!tx_pool)
 897                         continue;
 898
 899                 for (j = 0; j < tx_entries; j++) {
 900                         if (tx_pool->tx_buff[j].skb) {
 901                                 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
 902                                 tx_pool->tx_buff[j].skb = NULL;
 903                         }
 904                 }
 905         }
 906 }
 907
 908 static int __ibmvnic_close(struct net_device *netdev)
 909 {
 910         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 911         int rc = 0;
 912         int i;
 913
 914         adapter->state = VNIC_CLOSING;
 915
 916         /* ensure that transmissions are stopped if called by do_reset */
 917         if (adapter->resetting)
 918                 netif_tx_disable(netdev);
 919         else
 920                 netif_tx_stop_all_queues(netdev);
 921
 922         ibmvnic_napi_disable(adapter);
 923
 924         if (adapter->tx_scrq) {
 925                 for (i = 0; i < adapter->req_tx_queues; i++)
 926                         if (adapter->tx_scrq[i]->irq)
 927                                 disable_irq(adapter->tx_scrq[i]->irq);
 928         }
 929
 930         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
 931         if (rc)
 932                 return rc;
 933
 934         if (adapter->rx_scrq) {
 935                 for (i = 0; i < adapter->req_rx_queues; i++) {
 936                         int retries = 10;
 937
 938                         while (pending_scrq(adapter, adapter->rx_scrq[i])) {
 939                                 retries--;
 940                                 mdelay(100);
 941
 942                                 if (retries == 0)
 943                                         break;
 944                         }
 945
 946                         if (adapter->rx_scrq[i]->irq)
 947                                 disable_irq(adapter->rx_scrq[i]->irq);
 948                 }
 949         }
 950
 951         clean_tx_pools(adapter);
 952         adapter->state = VNIC_CLOSED;
 953         return rc;
 954 }
 955
 956 static int ibmvnic_close(struct net_device *netdev)
 957 {
 958         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 959         int rc;
 960
 961         mutex_lock(&adapter->reset_lock);
 962         rc = __ibmvnic_close(netdev);
 963         mutex_unlock(&adapter->reset_lock);
 964
 965         return rc;
 966 }
 967
 968 /**
 969  * build_hdr_data - creates L2/L3/L4 header data buffer
 970  * @hdr_field - bitfield determining needed headers
 971  * @skb - socket buffer
 972  * @hdr_len - array of header lengths
 973  * @tot_len - total length of data
 974  *
 975  * Reads hdr_field to determine which headers are needed by firmware.
 976  * Builds a buffer containing these headers.  Saves individual header
 977  * lengths and total buffer length to be used to build descriptors.
 978  */
 979 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
 980                           int *hdr_len, u8 *hdr_data)
 981 {
 982         int len = 0;
 983         u8 *hdr;
 984
 985         hdr_len[0] = sizeof(struct ethhdr);
 986
 987         if (skb->protocol == htons(ETH_P_IP)) {
 988                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
 989                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 990                         hdr_len[2] = tcp_hdrlen(skb);
 991                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
 992                         hdr_len[2] = sizeof(struct udphdr);
 993         } else if (skb->protocol == htons(ETH_P_IPV6)) {
 994                 hdr_len[1] = sizeof(struct ipv6hdr);
 995                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
 996                         hdr_len[2] = tcp_hdrlen(skb);
 997                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
 998                         hdr_len[2] = sizeof(struct udphdr);
 999         }
1000
1001         memset(hdr_data, 0, 120);
1002         if ((hdr_field >> 6) & 1) {
1003                 hdr = skb_mac_header(skb);
1004                 memcpy(hdr_data, hdr, hdr_len[0]);
1005                 len += hdr_len[0];
1006         }
1007
1008         if ((hdr_field >> 5) & 1) {
1009                 hdr = skb_network_header(skb);
1010                 memcpy(hdr_data + len, hdr, hdr_len[1]);
1011                 len += hdr_len[1];
1012         }
1013
1014         if ((hdr_field >> 4) & 1) {
1015                 hdr = skb_transport_header(skb);
1016                 memcpy(hdr_data + len, hdr, hdr_len[2]);
1017                 len += hdr_len[2];
1018         }
1019         return len;
1020 }
1021
1022 /**
1023  * create_hdr_descs - create header and header extension descriptors
1024  * @hdr_field - bitfield determining needed headers
1025  * @data - buffer containing header data
1026  * @len - length of data buffer
1027  * @hdr_len - array of individual header lengths
1028  * @scrq_arr - descriptor array
1029  *
1030  * Creates header and, if needed, header extension descriptors and
1031  * places them in a descriptor array, scrq_arr
1032  */
1033
1034 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1035                              union sub_crq *scrq_arr)
1036 {
1037         union sub_crq hdr_desc;
1038         int tmp_len = len;
1039         u8 *data, *cur;
1040         int tmp;
1041
1042         while (tmp_len > 0) {
1043                 cur = hdr_data + len - tmp_len;
1044
1045                 memset(&hdr_desc, 0, sizeof(hdr_desc));
1046                 if (cur != hdr_data) {
1047                         data = hdr_desc.hdr_ext.data;
1048                         tmp = tmp_len > 29 ? 29 : tmp_len;
1049                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1050                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1051                         hdr_desc.hdr_ext.len = tmp;
1052                 } else {
1053                         data = hdr_desc.hdr.data;
1054                         tmp = tmp_len > 24 ? 24 : tmp_len;
1055                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1056                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1057                         hdr_desc.hdr.len = tmp;
1058                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1059                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1060                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1061                         hdr_desc.hdr.flag = hdr_field << 1;
1062                 }
1063                 memcpy(data, cur, tmp);
1064                 tmp_len -= tmp;
1065                 *scrq_arr = hdr_desc;
1066                 scrq_arr++;
1067         }
1068 }
1069
1070 /**
1071  * build_hdr_descs_arr - build a header descriptor array
1072  * @skb - socket buffer
1073  * @num_entries - number of descriptors to be sent
1074  * @subcrq - first TX descriptor
1075  * @hdr_field - bit field determining which headers will be sent
1076  *
1077  * This function will build a TX descriptor array with applicable
1078  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1079  */
1080
1081 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1082                                 int *num_entries, u8 hdr_field)
1083 {
1084         int hdr_len[3] = {0, 0, 0};
1085         int tot_len, len;
1086         u8 *hdr_data = txbuff->hdr_data;
1087
1088         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1089                                  txbuff->hdr_data);
1090         len = tot_len;
1091         len -= 24;
1092         if (len > 0)
1093                 num_entries += len % 29 ? len / 29 + 1 : len / 29;
1094         create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1095                          txbuff->indir_arr + 1);
1096 }
1097
1098 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1099 {
1100         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1101         int queue_num = skb_get_queue_mapping(skb);
1102         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1103         struct device *dev = &adapter->vdev->dev;
1104         struct ibmvnic_tx_buff *tx_buff = NULL;
1105         struct ibmvnic_sub_crq_queue *tx_scrq;
1106         struct ibmvnic_tx_pool *tx_pool;
1107         unsigned int tx_send_failed = 0;
1108         unsigned int tx_map_failed = 0;
1109         unsigned int tx_dropped = 0;
1110         unsigned int tx_packets = 0;
1111         unsigned int tx_bytes = 0;
1112         dma_addr_t data_dma_addr;
1113         struct netdev_queue *txq;
1114         unsigned long lpar_rc;
1115         union sub_crq tx_crq;
1116         unsigned int offset;
1117         int num_entries = 1;
1118         unsigned char *dst;
1119         u64 *handle_array;
1120         int index = 0;
1121         int ret = 0;
1122
1123         if (adapter->resetting) {
1124                 if (!netif_subqueue_stopped(netdev, skb))
1125                         netif_stop_subqueue(netdev, queue_num);
1126                 dev_kfree_skb_any(skb);
1127
1128                 tx_send_failed++;
1129                 tx_dropped++;
1130                 ret = NETDEV_TX_OK;
1131                 goto out;
1132         }
1133
1134         tx_pool = &adapter->tx_pool[queue_num];
1135         tx_scrq = adapter->tx_scrq[queue_num];
1136         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1137         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1138                 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1139
1140         index = tx_pool->free_map[tx_pool->consumer_index];
1141         offset = index * adapter->req_mtu;
1142         dst = tx_pool->long_term_buff.buff + offset;
1143         memset(dst, 0, adapter->req_mtu);
1144         skb_copy_from_linear_data(skb, dst, skb->len);
1145         data_dma_addr = tx_pool->long_term_buff.addr + offset;
1146
1147         tx_pool->consumer_index =
1148             (tx_pool->consumer_index + 1) %
1149                 adapter->req_tx_entries_per_subcrq;
1150
1151         tx_buff = &tx_pool->tx_buff[index];
1152         tx_buff->skb = skb;
1153         tx_buff->data_dma[0] = data_dma_addr;
1154         tx_buff->data_len[0] = skb->len;
1155         tx_buff->index = index;
1156         tx_buff->pool_index = queue_num;
1157         tx_buff->last_frag = true;
1158
1159         memset(&tx_crq, 0, sizeof(tx_crq));
1160         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1161         tx_crq.v1.type = IBMVNIC_TX_DESC;
1162         tx_crq.v1.n_crq_elem = 1;
1163         tx_crq.v1.n_sge = 1;
1164         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1165         tx_crq.v1.correlator = cpu_to_be32(index);
1166         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1167         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1168         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1169
1170         if (adapter->vlan_header_insertion) {
1171                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1172                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1173         }
1174
1175         if (skb->protocol == htons(ETH_P_IP)) {
1176                 if (ip_hdr(skb)->version == 4)
1177                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1178                 else if (ip_hdr(skb)->version == 6)
1179                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1180
1181                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1182                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1183                 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
1184                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1185         }
1186
1187         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1188                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1189                 hdrs += 2;
1190         }
1191         /* determine if l2/3/4 headers are sent to firmware */
1192         if ((*hdrs >> 7) & 1 &&
1193             (skb->protocol == htons(ETH_P_IP) ||
1194              skb->protocol == htons(ETH_P_IPV6))) {
1195                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1196                 tx_crq.v1.n_crq_elem = num_entries;
1197                 tx_buff->indir_arr[0] = tx_crq;
1198                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1199                                                     sizeof(tx_buff->indir_arr),
1200                                                     DMA_TO_DEVICE);
1201                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1202                         dev_kfree_skb_any(skb);
1203                         tx_buff->skb = NULL;
1204                         if (!firmware_has_feature(FW_FEATURE_CMO))
1205                                 dev_err(dev, "tx: unable to map descriptor array\n");
1206                         tx_map_failed++;
1207                         tx_dropped++;
1208                         ret = NETDEV_TX_OK;
1209                         goto out;
1210                 }
1211                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1212                                                (u64)tx_buff->indir_dma,
1213                                                (u64)num_entries);
1214         } else {
1215                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1216                                       &tx_crq);
1217         }
1218         if (lpar_rc != H_SUCCESS) {
1219                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1220
1221                 if (tx_pool->consumer_index == 0)
1222                         tx_pool->consumer_index =
1223                                 adapter->req_tx_entries_per_subcrq - 1;
1224                 else
1225                         tx_pool->consumer_index--;
1226
1227                 dev_kfree_skb_any(skb);
1228                 tx_buff->skb = NULL;
1229
1230                 if (lpar_rc == H_CLOSED) {
1231                         /* Disable TX and report carrier off if queue is closed.
1232                          * Firmware guarantees that a signal will be sent to the
1233                          * driver, triggering a reset or some other action.
1234                          */
1235                         netif_tx_stop_all_queues(netdev);
1236                         netif_carrier_off(netdev);
1237                 }
1238
1239                 tx_send_failed++;
1240                 tx_dropped++;
1241                 ret = NETDEV_TX_OK;
1242                 goto out;
1243         }
1244
1245         if (atomic_inc_return(&tx_scrq->used)
1246                                         >= adapter->req_tx_entries_per_subcrq) {
1247                 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1248                 netif_stop_subqueue(netdev, queue_num);
1249         }
1250
1251         tx_packets++;
1252         tx_bytes += skb->len;
1253         txq->trans_start = jiffies;
1254         ret = NETDEV_TX_OK;
1255
1256 out:
1257         netdev->stats.tx_dropped += tx_dropped;
1258         netdev->stats.tx_bytes += tx_bytes;
1259         netdev->stats.tx_packets += tx_packets;
1260         adapter->tx_send_failed += tx_send_failed;
1261         adapter->tx_map_failed += tx_map_failed;
1262
1263         return ret;
1264 }
1265
1266 static void ibmvnic_set_multi(struct net_device *netdev)
1267 {
1268         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1269         struct netdev_hw_addr *ha;
1270         union ibmvnic_crq crq;
1271
1272         memset(&crq, 0, sizeof(crq));
1273         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1274         crq.request_capability.cmd = REQUEST_CAPABILITY;
1275
1276         if (netdev->flags & IFF_PROMISC) {
1277                 if (!adapter->promisc_supported)
1278                         return;
1279         } else {
1280                 if (netdev->flags & IFF_ALLMULTI) {
1281                         /* Accept all multicast */
1282                         memset(&crq, 0, sizeof(crq));
1283                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1284                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1285                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1286                         ibmvnic_send_crq(adapter, &crq);
1287                 } else if (netdev_mc_empty(netdev)) {
1288                         /* Reject all multicast */
1289                         memset(&crq, 0, sizeof(crq));
1290                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1291                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1292                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1293                         ibmvnic_send_crq(adapter, &crq);
1294                 } else {
1295                         /* Accept one or more multicast(s) */
1296                         netdev_for_each_mc_addr(ha, netdev) {
1297                                 memset(&crq, 0, sizeof(crq));
1298                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1299                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1300                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1301                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1302                                                 ha->addr);
1303                                 ibmvnic_send_crq(adapter, &crq);
1304                         }
1305                 }
1306         }
1307 }
1308
1309 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1310 {
1311         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1312         struct sockaddr *addr = p;
1313         union ibmvnic_crq crq;
1314
1315         if (!is_valid_ether_addr(addr->sa_data))
1316                 return -EADDRNOTAVAIL;
1317
1318         memset(&crq, 0, sizeof(crq));
1319         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1320         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1321         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1322         ibmvnic_send_crq(adapter, &crq);
1323         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1324         return 0;
1325 }
1326
1327 /**
1328  * do_reset returns zero if we are able to keep processing reset events, or
1329  * non-zero if we hit a fatal error and must halt.
1330  */
1331 static int do_reset(struct ibmvnic_adapter *adapter,
1332                     struct ibmvnic_rwi *rwi, u32 reset_state)
1333 {
1334         struct net_device *netdev = adapter->netdev;
1335         int i, rc;
1336
1337         netif_carrier_off(netdev);
1338         adapter->reset_reason = rwi->reset_reason;
1339
1340         if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1341                 rc = ibmvnic_reenable_crq_queue(adapter);
1342                 if (rc)
1343                         return 0;
1344         }
1345
1346         rc = __ibmvnic_close(netdev);
1347         if (rc)
1348                 return rc;
1349
1350         if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1351                 /* remove the closed state so when we call open it appears
1352                  * we are coming from the probed state.
1353                  */
1354                 adapter->state = VNIC_PROBED;
1355
1356                 rc = ibmvnic_init(adapter);
1357                 if (rc)
1358                         return 0;
1359
1360                 /* If the adapter was in PROBE state prior to the reset,
1361                  * exit here.
1362                  */
1363                 if (reset_state == VNIC_PROBED)
1364                         return 0;
1365
1366                 rc = ibmvnic_login(netdev);
1367                 if (rc) {
1368                         adapter->state = VNIC_PROBED;
1369                         return 0;
1370                 }
1371
1372                 rc = reset_tx_pools(adapter);
1373                 if (rc)
1374                         return rc;
1375
1376                 rc = reset_rx_pools(adapter);
1377                 if (rc)
1378                         return rc;
1379
1380                 if (reset_state == VNIC_CLOSED)
1381                         return 0;
1382         }
1383
1384         rc = __ibmvnic_open(netdev);
1385         if (rc) {
1386                 if (list_empty(&adapter->rwi_list))
1387                         adapter->state = VNIC_CLOSED;
1388                 else
1389                         adapter->state = reset_state;
1390
1391                 return 0;
1392         }
1393
1394         netif_carrier_on(netdev);
1395
1396         /* kick napi */
1397         for (i = 0; i < adapter->req_rx_queues; i++)
1398                 napi_schedule(&adapter->napi[i]);
1399
1400         if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1401                 netdev_notify_peers(netdev);
1402
1403         return 0;
1404 }
1405
1406 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1407 {
1408         struct ibmvnic_rwi *rwi;
1409
1410         mutex_lock(&adapter->rwi_lock);
1411
1412         if (!list_empty(&adapter->rwi_list)) {
1413                 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1414                                        list);
1415                 list_del(&rwi->list);
1416         } else {
1417                 rwi = NULL;
1418         }
1419
1420         mutex_unlock(&adapter->rwi_lock);
1421         return rwi;
1422 }
1423
1424 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1425 {
1426         struct ibmvnic_rwi *rwi;
1427
1428         rwi = get_next_rwi(adapter);
1429         while (rwi) {
1430                 kfree(rwi);
1431                 rwi = get_next_rwi(adapter);
1432         }
1433 }
1434
1435 static void __ibmvnic_reset(struct work_struct *work)
1436 {
1437         struct ibmvnic_rwi *rwi;
1438         struct ibmvnic_adapter *adapter;
1439         struct net_device *netdev;
1440         u32 reset_state;
1441         int rc;
1442
1443         adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1444         netdev = adapter->netdev;
1445
1446         mutex_lock(&adapter->reset_lock);
1447         adapter->resetting = true;
1448         reset_state = adapter->state;
1449
1450         rwi = get_next_rwi(adapter);
1451         while (rwi) {
1452                 rc = do_reset(adapter, rwi, reset_state);
1453                 kfree(rwi);
1454                 if (rc)
1455                         break;
1456
1457                 rwi = get_next_rwi(adapter);
1458         }
1459
1460         if (rc) {
1461                 free_all_rwi(adapter);
1462                 mutex_unlock(&adapter->reset_lock);
1463                 return;
1464         }
1465
1466         adapter->resetting = false;
1467         mutex_unlock(&adapter->reset_lock);
1468 }
1469
1470 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1471                           enum ibmvnic_reset_reason reason)
1472 {
1473         struct ibmvnic_rwi *rwi, *tmp;
1474         struct net_device *netdev = adapter->netdev;
1475         struct list_head *entry;
1476
1477         if (adapter->state == VNIC_REMOVING ||
1478             adapter->state == VNIC_REMOVED) {
1479                 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1480                 return;
1481         }
1482
1483         if (adapter->state == VNIC_PROBING) {
1484                 netdev_warn(netdev, "Adapter reset during probe\n");
1485                 adapter->init_done_rc = EAGAIN;
1486                 return;
1487         }
1488
1489         mutex_lock(&adapter->rwi_lock);
1490
1491         list_for_each(entry, &adapter->rwi_list) {
1492                 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1493                 if (tmp->reset_reason == reason) {
1494                         netdev_err(netdev, "Matching reset found, skipping\n");
1495                         mutex_unlock(&adapter->rwi_lock);
1496                         return;
1497                 }
1498         }
1499
1500         rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1501         if (!rwi) {
1502                 mutex_unlock(&adapter->rwi_lock);
1503                 ibmvnic_close(netdev);
1504                 return;
1505         }
1506
1507         rwi->reset_reason = reason;
1508         list_add_tail(&rwi->list, &adapter->rwi_list);
1509         mutex_unlock(&adapter->rwi_lock);
1510         schedule_work(&adapter->ibmvnic_reset);
1511 }
1512
1513 static void ibmvnic_tx_timeout(struct net_device *dev)
1514 {
1515         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1516
1517         ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1518 }
1519
1520 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1521                                   struct ibmvnic_rx_buff *rx_buff)
1522 {
1523         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1524
1525         rx_buff->skb = NULL;
1526
1527         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1528         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1529
1530         atomic_dec(&pool->available);
1531 }
1532
1533 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1534 {
1535         struct net_device *netdev = napi->dev;
1536         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1537         int scrq_num = (int)(napi - adapter->napi);
1538         int frames_processed = 0;
1539
1540 restart_poll:
1541         while (frames_processed < budget) {
1542                 struct sk_buff *skb;
1543                 struct ibmvnic_rx_buff *rx_buff;
1544                 union sub_crq *next;
1545                 u32 length;
1546                 u16 offset;
1547                 u8 flags = 0;
1548
1549                 if (unlikely(adapter->resetting)) {
1550                         enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1551                         napi_complete_done(napi, frames_processed);
1552                         return frames_processed;
1553                 }
1554
1555                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1556                         break;
1557                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1558                 rx_buff =
1559                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1560                                                           rx_comp.correlator);
1561                 /* do error checking */
1562                 if (next->rx_comp.rc) {
1563                         netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1564                         /* free the entry */
1565                         next->rx_comp.first = 0;
1566                         remove_buff_from_pool(adapter, rx_buff);
1567                         continue;
1568                 }
1569
1570                 length = be32_to_cpu(next->rx_comp.len);
1571                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1572                 flags = next->rx_comp.flags;
1573                 skb = rx_buff->skb;
1574                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1575                                         length);
1576
1577                 /* VLAN Header has been stripped by the system firmware and
1578                  * needs to be inserted by the driver
1579                  */
1580                 if (adapter->rx_vlan_header_insertion &&
1581                     (flags & IBMVNIC_VLAN_STRIPPED))
1582                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1583                                                ntohs(next->rx_comp.vlan_tci));
1584
1585                 /* free the entry */
1586                 next->rx_comp.first = 0;
1587                 remove_buff_from_pool(adapter, rx_buff);
1588
1589                 skb_put(skb, length);
1590                 skb->protocol = eth_type_trans(skb, netdev);
1591                 skb_record_rx_queue(skb, scrq_num);
1592
1593                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1594                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1595                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1596                 }
1597
1598                 length = skb->len;
1599                 napi_gro_receive(napi, skb); /* send it up */
1600                 netdev->stats.rx_packets++;
1601                 netdev->stats.rx_bytes += length;
1602                 frames_processed++;
1603         }
1604
1605         if (adapter->state != VNIC_CLOSING)
1606                 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1607
1608         if (frames_processed < budget) {
1609                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1610                 napi_complete_done(napi, frames_processed);
1611                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1612                     napi_reschedule(napi)) {
1613                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1614                         goto restart_poll;
1615                 }
1616         }
1617         return frames_processed;
1618 }
1619
1620 #ifdef CONFIG_NET_POLL_CONTROLLER
1621 static void ibmvnic_netpoll_controller(struct net_device *dev)
1622 {
1623         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1624         int i;
1625
1626         replenish_pools(netdev_priv(dev));
1627         for (i = 0; i < adapter->req_rx_queues; i++)
1628                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1629                                      adapter->rx_scrq[i]);
1630 }
1631 #endif
1632
1633 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
1634 {
1635         return -EOPNOTSUPP;
1636 }
1637
1638 static const struct net_device_ops ibmvnic_netdev_ops = {
1639         .ndo_open               = ibmvnic_open,
1640         .ndo_stop               = ibmvnic_close,
1641         .ndo_start_xmit         = ibmvnic_xmit,
1642         .ndo_set_rx_mode        = ibmvnic_set_multi,
1643         .ndo_set_mac_address    = ibmvnic_set_mac,
1644         .ndo_validate_addr      = eth_validate_addr,
1645         .ndo_tx_timeout         = ibmvnic_tx_timeout,
1646 #ifdef CONFIG_NET_POLL_CONTROLLER
1647         .ndo_poll_controller    = ibmvnic_netpoll_controller,
1648 #endif
1649         .ndo_change_mtu         = ibmvnic_change_mtu,
1650 };
1651
1652 /* ethtool functions */
1653
1654 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1655                                       struct ethtool_link_ksettings *cmd)
1656 {
1657         u32 supported, advertising;
1658
1659         supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1660                           SUPPORTED_FIBRE);
1661         advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1662                             ADVERTISED_FIBRE);
1663         cmd->base.speed = SPEED_1000;
1664         cmd->base.duplex = DUPLEX_FULL;
1665         cmd->base.port = PORT_FIBRE;
1666         cmd->base.phy_address = 0;
1667         cmd->base.autoneg = AUTONEG_ENABLE;
1668
1669         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1670                                                 supported);
1671         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1672                                                 advertising);
1673
1674         return 0;
1675 }
1676
1677 static void ibmvnic_get_drvinfo(struct net_device *dev,
1678                                 struct ethtool_drvinfo *info)
1679 {
1680         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1681         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1682 }
1683
1684 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1685 {
1686         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1687
1688         return adapter->msg_enable;
1689 }
1690
1691 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1692 {
1693         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1694
1695         adapter->msg_enable = data;
1696 }
1697
1698 static u32 ibmvnic_get_link(struct net_device *netdev)
1699 {
1700         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1701
1702         /* Don't need to send a query because we request a logical link up at
1703          * init and then we wait for link state indications
1704          */
1705         return adapter->logical_link_state;
1706 }
1707
1708 static void ibmvnic_get_ringparam(struct net_device *netdev,
1709                                   struct ethtool_ringparam *ring)
1710 {
1711         ring->rx_max_pending = 0;
1712         ring->tx_max_pending = 0;
1713         ring->rx_mini_max_pending = 0;
1714         ring->rx_jumbo_max_pending = 0;
1715         ring->rx_pending = 0;
1716         ring->tx_pending = 0;
1717         ring->rx_mini_pending = 0;
1718         ring->rx_jumbo_pending = 0;
1719 }
1720
1721 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1722 {
1723         int i;
1724
1725         if (stringset != ETH_SS_STATS)
1726                 return;
1727
1728         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1729                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1730 }
1731
1732 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1733 {
1734         switch (sset) {
1735         case ETH_SS_STATS:
1736                 return ARRAY_SIZE(ibmvnic_stats);
1737         default:
1738                 return -EOPNOTSUPP;
1739         }
1740 }
1741
1742 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1743                                       struct ethtool_stats *stats, u64 *data)
1744 {
1745         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1746         union ibmvnic_crq crq;
1747         int i;
1748
1749         memset(&crq, 0, sizeof(crq));
1750         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1751         crq.request_statistics.cmd = REQUEST_STATISTICS;
1752         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1753         crq.request_statistics.len =
1754             cpu_to_be32(sizeof(struct ibmvnic_statistics));
1755
1756         /* Wait for data to be written */
1757         init_completion(&adapter->stats_done);
1758         ibmvnic_send_crq(adapter, &crq);
1759         wait_for_completion(&adapter->stats_done);
1760
1761         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1762                 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1763 }
1764
1765 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1766         .get_drvinfo            = ibmvnic_get_drvinfo,
1767         .get_msglevel           = ibmvnic_get_msglevel,
1768         .set_msglevel           = ibmvnic_set_msglevel,
1769         .get_link               = ibmvnic_get_link,
1770         .get_ringparam          = ibmvnic_get_ringparam,
1771         .get_strings            = ibmvnic_get_strings,
1772         .get_sset_count         = ibmvnic_get_sset_count,
1773         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
1774         .get_link_ksettings     = ibmvnic_get_link_ksettings,
1775 };
1776
1777 /* Routines for managing CRQs/sCRQs  */
1778
1779 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
1780                                    struct ibmvnic_sub_crq_queue *scrq)
1781 {
1782         int rc;
1783
1784         if (scrq->irq) {
1785                 free_irq(scrq->irq, scrq);
1786                 irq_dispose_mapping(scrq->irq);
1787                 scrq->irq = 0;
1788         }
1789
1790         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1791         scrq->cur = 0;
1792
1793         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1794                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1795         return rc;
1796 }
1797
1798 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
1799 {
1800         int i, rc;
1801
1802         for (i = 0; i < adapter->req_tx_queues; i++) {
1803                 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1804                 if (rc)
1805                         return rc;
1806         }
1807
1808         for (i = 0; i < adapter->req_rx_queues; i++) {
1809                 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1810                 if (rc)
1811                         return rc;
1812         }
1813
1814         return rc;
1815 }
1816
1817 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1818                                   struct ibmvnic_sub_crq_queue *scrq)
1819 {
1820         struct device *dev = &adapter->vdev->dev;
1821         long rc;
1822
1823         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1824
1825         /* Close the sub-crqs */
1826         do {
1827                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1828                                         adapter->vdev->unit_address,
1829                                         scrq->crq_num);
1830         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1831
1832         if (rc) {
1833                 netdev_err(adapter->netdev,
1834                            "Failed to release sub-CRQ %16lx, rc = %ld\n",
1835                            scrq->crq_num, rc);
1836         }
1837
1838         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1839                          DMA_BIDIRECTIONAL);
1840         free_pages((unsigned long)scrq->msgs, 2);
1841         kfree(scrq);
1842 }
1843
1844 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1845                                                         *adapter)
1846 {
1847         struct device *dev = &adapter->vdev->dev;
1848         struct ibmvnic_sub_crq_queue *scrq;
1849         int rc;
1850
1851         scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
1852         if (!scrq)
1853                 return NULL;
1854
1855         scrq->msgs =
1856                 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
1857         if (!scrq->msgs) {
1858                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1859                 goto zero_page_failed;
1860         }
1861
1862         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1863                                          DMA_BIDIRECTIONAL);
1864         if (dma_mapping_error(dev, scrq->msg_token)) {
1865                 dev_warn(dev, "Couldn't map crq queue messages page\n");
1866                 goto map_failed;
1867         }
1868
1869         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1870                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1871
1872         if (rc == H_RESOURCE)
1873                 rc = ibmvnic_reset_crq(adapter);
1874
1875         if (rc == H_CLOSED) {
1876                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1877         } else if (rc) {
1878                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1879                 goto reg_failed;
1880         }
1881
1882         scrq->adapter = adapter;
1883         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1884         spin_lock_init(&scrq->lock);
1885
1886         netdev_dbg(adapter->netdev,
1887                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1888                    scrq->crq_num, scrq->hw_irq, scrq->irq);
1889
1890         return scrq;
1891
1892 reg_failed:
1893         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1894                          DMA_BIDIRECTIONAL);
1895 map_failed:
1896         free_pages((unsigned long)scrq->msgs, 2);
1897 zero_page_failed:
1898         kfree(scrq);
1899
1900         return NULL;
1901 }
1902
1903 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1904 {
1905         int i;
1906
1907         if (adapter->tx_scrq) {
1908                 for (i = 0; i < adapter->req_tx_queues; i++) {
1909                         if (!adapter->tx_scrq[i])
1910                                 continue;
1911
1912                         if (adapter->tx_scrq[i]->irq) {
1913                                 free_irq(adapter->tx_scrq[i]->irq,
1914                                          adapter->tx_scrq[i]);
1915                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1916                                 adapter->tx_scrq[i]->irq = 0;
1917                         }
1918
1919                         release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1920                 }
1921
1922                 kfree(adapter->tx_scrq);
1923                 adapter->tx_scrq = NULL;
1924         }
1925
1926         if (adapter->rx_scrq) {
1927                 for (i = 0; i < adapter->req_rx_queues; i++) {
1928                         if (!adapter->rx_scrq[i])
1929                                 continue;
1930
1931                         if (adapter->rx_scrq[i]->irq) {
1932                                 free_irq(adapter->rx_scrq[i]->irq,
1933                                          adapter->rx_scrq[i]);
1934                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1935                                 adapter->rx_scrq[i]->irq = 0;
1936                         }
1937
1938                         release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1939                 }
1940
1941                 kfree(adapter->rx_scrq);
1942                 adapter->rx_scrq = NULL;
1943         }
1944 }
1945
1946 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1947                             struct ibmvnic_sub_crq_queue *scrq)
1948 {
1949         struct device *dev = &adapter->vdev->dev;
1950         unsigned long rc;
1951
1952         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1953                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1954         if (rc)
1955                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1956                         scrq->hw_irq, rc);
1957         return rc;
1958 }
1959
1960 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1961                            struct ibmvnic_sub_crq_queue *scrq)
1962 {
1963         struct device *dev = &adapter->vdev->dev;
1964         unsigned long rc;
1965
1966         if (scrq->hw_irq > 0x100000000ULL) {
1967                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1968                 return 1;
1969         }
1970
1971         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1972                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1973         if (rc)
1974                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1975                         scrq->hw_irq, rc);
1976         return rc;
1977 }
1978
1979 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1980                                struct ibmvnic_sub_crq_queue *scrq)
1981 {
1982         struct device *dev = &adapter->vdev->dev;
1983         struct ibmvnic_tx_buff *txbuff;
1984         union sub_crq *next;
1985         int index;
1986         int i, j;
1987         u8 first;
1988
1989 restart_loop:
1990         while (pending_scrq(adapter, scrq)) {
1991                 unsigned int pool = scrq->pool_index;
1992
1993                 next = ibmvnic_next_scrq(adapter, scrq);
1994                 for (i = 0; i < next->tx_comp.num_comps; i++) {
1995                         if (next->tx_comp.rcs[i]) {
1996                                 dev_err(dev, "tx error %x\n",
1997                                         next->tx_comp.rcs[i]);
1998                                 continue;
1999                         }
2000                         index = be32_to_cpu(next->tx_comp.correlators[i]);
2001                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
2002
2003                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2004                                 if (!txbuff->data_dma[j])
2005                                         continue;
2006
2007                                 txbuff->data_dma[j] = 0;
2008                         }
2009                         /* if sub_crq was sent indirectly */
2010                         first = txbuff->indir_arr[0].generic.first;
2011                         if (first == IBMVNIC_CRQ_CMD) {
2012                                 dma_unmap_single(dev, txbuff->indir_dma,
2013                                                  sizeof(txbuff->indir_arr),
2014                                                  DMA_TO_DEVICE);
2015                         }
2016
2017                         if (txbuff->last_frag) {
2018                                 dev_kfree_skb_any(txbuff->skb);
2019                                 txbuff->skb = NULL;
2020                         }
2021
2022                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2023                                                      producer_index] = index;
2024                         adapter->tx_pool[pool].producer_index =
2025                             (adapter->tx_pool[pool].producer_index + 1) %
2026                             adapter->req_tx_entries_per_subcrq;
2027                 }
2028                 /* remove tx_comp scrq*/
2029                 next->tx_comp.first = 0;
2030
2031                 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
2032                     (adapter->req_tx_entries_per_subcrq / 2) &&
2033                     __netif_subqueue_stopped(adapter->netdev,
2034                                              scrq->pool_index)) {
2035                         netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2036                         netdev_info(adapter->netdev, "Started queue %d\n",
2037                                     scrq->pool_index);
2038                 }
2039         }
2040
2041         enable_scrq_irq(adapter, scrq);
2042
2043         if (pending_scrq(adapter, scrq)) {
2044                 disable_scrq_irq(adapter, scrq);
2045                 goto restart_loop;
2046         }
2047
2048         return 0;
2049 }
2050
2051 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2052 {
2053         struct ibmvnic_sub_crq_queue *scrq = instance;
2054         struct ibmvnic_adapter *adapter = scrq->adapter;
2055
2056         disable_scrq_irq(adapter, scrq);
2057         ibmvnic_complete_tx(adapter, scrq);
2058
2059         return IRQ_HANDLED;
2060 }
2061
2062 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2063 {
2064         struct ibmvnic_sub_crq_queue *scrq = instance;
2065         struct ibmvnic_adapter *adapter = scrq->adapter;
2066
2067         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2068                 disable_scrq_irq(adapter, scrq);
2069                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2070         }
2071
2072         return IRQ_HANDLED;
2073 }
2074
2075 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2076 {
2077         struct device *dev = &adapter->vdev->dev;
2078         struct ibmvnic_sub_crq_queue *scrq;
2079         int i = 0, j = 0;
2080         int rc = 0;
2081
2082         for (i = 0; i < adapter->req_tx_queues; i++) {
2083                 scrq = adapter->tx_scrq[i];
2084                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2085
2086                 if (!scrq->irq) {
2087                         rc = -EINVAL;
2088                         dev_err(dev, "Error mapping irq\n");
2089                         goto req_tx_irq_failed;
2090                 }
2091
2092                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2093                                  0, "ibmvnic_tx", scrq);
2094
2095                 if (rc) {
2096                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2097                                 scrq->irq, rc);
2098                         irq_dispose_mapping(scrq->irq);
2099                         goto req_rx_irq_failed;
2100                 }
2101         }
2102
2103         for (i = 0; i < adapter->req_rx_queues; i++) {
2104                 scrq = adapter->rx_scrq[i];
2105                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2106                 if (!scrq->irq) {
2107                         rc = -EINVAL;
2108                         dev_err(dev, "Error mapping irq\n");
2109                         goto req_rx_irq_failed;
2110                 }
2111                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2112                                  0, "ibmvnic_rx", scrq);
2113                 if (rc) {
2114                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2115                                 scrq->irq, rc);
2116                         irq_dispose_mapping(scrq->irq);
2117                         goto req_rx_irq_failed;
2118                 }
2119         }
2120         return rc;
2121
2122 req_rx_irq_failed:
2123         for (j = 0; j < i; j++) {
2124                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2125                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2126         }
2127         i = adapter->req_tx_queues;
2128 req_tx_irq_failed:
2129         for (j = 0; j < i; j++) {
2130                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2131                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2132         }
2133         release_sub_crqs(adapter);
2134         return rc;
2135 }
2136
2137 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2138 {
2139         struct device *dev = &adapter->vdev->dev;
2140         struct ibmvnic_sub_crq_queue **allqueues;
2141         int registered_queues = 0;
2142         int total_queues;
2143         int more = 0;
2144         int i;
2145
2146         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2147
2148         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2149         if (!allqueues)
2150                 return -1;
2151
2152         for (i = 0; i < total_queues; i++) {
2153                 allqueues[i] = init_sub_crq_queue(adapter);
2154                 if (!allqueues[i]) {
2155                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2156                         break;
2157                 }
2158                 registered_queues++;
2159         }
2160
2161         /* Make sure we were able to register the minimum number of queues */
2162         if (registered_queues <
2163             adapter->min_tx_queues + adapter->min_rx_queues) {
2164                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
2165                 goto tx_failed;
2166         }
2167
2168         /* Distribute the failed allocated queues*/
2169         for (i = 0; i < total_queues - registered_queues + more ; i++) {
2170                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2171                 switch (i % 3) {
2172                 case 0:
2173                         if (adapter->req_rx_queues > adapter->min_rx_queues)
2174                                 adapter->req_rx_queues--;
2175                         else
2176                                 more++;
2177                         break;
2178                 case 1:
2179                         if (adapter->req_tx_queues > adapter->min_tx_queues)
2180                                 adapter->req_tx_queues--;
2181                         else
2182                                 more++;
2183                         break;
2184                 }
2185         }
2186
2187         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2188                                    sizeof(*adapter->tx_scrq), GFP_KERNEL);
2189         if (!adapter->tx_scrq)
2190                 goto tx_failed;
2191
2192         for (i = 0; i < adapter->req_tx_queues; i++) {
2193                 adapter->tx_scrq[i] = allqueues[i];
2194                 adapter->tx_scrq[i]->pool_index = i;
2195         }
2196
2197         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2198                                    sizeof(*adapter->rx_scrq), GFP_KERNEL);
2199         if (!adapter->rx_scrq)
2200                 goto rx_failed;
2201
2202         for (i = 0; i < adapter->req_rx_queues; i++) {
2203                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2204                 adapter->rx_scrq[i]->scrq_num = i;
2205         }
2206
2207         kfree(allqueues);
2208         return 0;
2209
2210 rx_failed:
2211         kfree(adapter->tx_scrq);
2212         adapter->tx_scrq = NULL;
2213 tx_failed:
2214         for (i = 0; i < registered_queues; i++)
2215                 release_sub_crq_queue(adapter, allqueues[i]);
2216         kfree(allqueues);
2217         return -1;
2218 }
2219
2220 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2221 {
2222         struct device *dev = &adapter->vdev->dev;
2223         union ibmvnic_crq crq;
2224
2225         if (!retry) {
2226                 /* Sub-CRQ entries are 32 byte long */
2227                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2228
2229                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2230                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
2231                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2232                         return;
2233                 }
2234
2235                 /* Get the minimum between the queried max and the entries
2236                  * that fit in our PAGE_SIZE
2237                  */
2238                 adapter->req_tx_entries_per_subcrq =
2239                     adapter->max_tx_entries_per_subcrq > entries_page ?
2240                     entries_page : adapter->max_tx_entries_per_subcrq;
2241                 adapter->req_rx_add_entries_per_subcrq =
2242                     adapter->max_rx_add_entries_per_subcrq > entries_page ?
2243                     entries_page : adapter->max_rx_add_entries_per_subcrq;
2244
2245                 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
2246                 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
2247                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2248
2249                 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2250         }
2251
2252         memset(&crq, 0, sizeof(crq));
2253         crq.request_capability.first = IBMVNIC_CRQ_CMD;
2254         crq.request_capability.cmd = REQUEST_CAPABILITY;
2255
2256         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2257         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2258         atomic_inc(&adapter->running_cap_crqs);
2259         ibmvnic_send_crq(adapter, &crq);
2260
2261         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2262         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2263         atomic_inc(&adapter->running_cap_crqs);
2264         ibmvnic_send_crq(adapter, &crq);
2265
2266         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2267         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2268         atomic_inc(&adapter->running_cap_crqs);
2269         ibmvnic_send_crq(adapter, &crq);
2270
2271         crq.request_capability.capability =
2272             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2273         crq.request_capability.number =
2274             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2275         atomic_inc(&adapter->running_cap_crqs);
2276         ibmvnic_send_crq(adapter, &crq);
2277
2278         crq.request_capability.capability =
2279             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2280         crq.request_capability.number =
2281             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2282         atomic_inc(&adapter->running_cap_crqs);
2283         ibmvnic_send_crq(adapter, &crq);
2284
2285         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2286         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2287         atomic_inc(&adapter->running_cap_crqs);
2288         ibmvnic_send_crq(adapter, &crq);
2289
2290         if (adapter->netdev->flags & IFF_PROMISC) {
2291                 if (adapter->promisc_supported) {
2292                         crq.request_capability.capability =
2293                             cpu_to_be16(PROMISC_REQUESTED);
2294                         crq.request_capability.number = cpu_to_be64(1);
2295                         atomic_inc(&adapter->running_cap_crqs);
2296                         ibmvnic_send_crq(adapter, &crq);
2297                 }
2298         } else {
2299                 crq.request_capability.capability =
2300                     cpu_to_be16(PROMISC_REQUESTED);
2301                 crq.request_capability.number = cpu_to_be64(0);
2302                 atomic_inc(&adapter->running_cap_crqs);
2303                 ibmvnic_send_crq(adapter, &crq);
2304         }
2305 }
2306
2307 static int pending_scrq(struct ibmvnic_adapter *adapter,
2308                         struct ibmvnic_sub_crq_queue *scrq)
2309 {
2310         union sub_crq *entry = &scrq->msgs[scrq->cur];
2311
2312         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
2313                 return 1;
2314         else
2315                 return 0;
2316 }
2317
2318 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2319                                         struct ibmvnic_sub_crq_queue *scrq)
2320 {
2321         union sub_crq *entry;
2322         unsigned long flags;
2323
2324         spin_lock_irqsave(&scrq->lock, flags);
2325         entry = &scrq->msgs[scrq->cur];
2326         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2327                 if (++scrq->cur == scrq->size)
2328                         scrq->cur = 0;
2329         } else {
2330                 entry = NULL;
2331         }
2332         spin_unlock_irqrestore(&scrq->lock, flags);
2333
2334         return entry;
2335 }
2336
2337 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2338 {
2339         struct ibmvnic_crq_queue *queue = &adapter->crq;
2340         union ibmvnic_crq *crq;
2341
2342         crq = &queue->msgs[queue->cur];
2343         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2344                 if (++queue->cur == queue->size)
2345                         queue->cur = 0;
2346         } else {
2347                 crq = NULL;
2348         }
2349
2350         return crq;
2351 }
2352
2353 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2354                        union sub_crq *sub_crq)
2355 {
2356         unsigned int ua = adapter->vdev->unit_address;
2357         struct device *dev = &adapter->vdev->dev;
2358         u64 *u64_crq = (u64 *)sub_crq;
2359         int rc;
2360
2361         netdev_dbg(adapter->netdev,
2362                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2363                    (unsigned long int)cpu_to_be64(remote_handle),
2364                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2365                    (unsigned long int)cpu_to_be64(u64_crq[1]),
2366                    (unsigned long int)cpu_to_be64(u64_crq[2]),
2367                    (unsigned long int)cpu_to_be64(u64_crq[3]));
2368
2369         /* Make sure the hypervisor sees the complete request */
2370         mb();
2371
2372         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2373                                 cpu_to_be64(remote_handle),
2374                                 cpu_to_be64(u64_crq[0]),
2375                                 cpu_to_be64(u64_crq[1]),
2376                                 cpu_to_be64(u64_crq[2]),
2377                                 cpu_to_be64(u64_crq[3]));
2378
2379         if (rc) {
2380                 if (rc == H_CLOSED)
2381                         dev_warn(dev, "CRQ Queue closed\n");
2382                 dev_err(dev, "Send error (rc=%d)\n", rc);
2383         }
2384
2385         return rc;
2386 }
2387
2388 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2389                                 u64 remote_handle, u64 ioba, u64 num_entries)
2390 {
2391         unsigned int ua = adapter->vdev->unit_address;
2392         struct device *dev = &adapter->vdev->dev;
2393         int rc;
2394
2395         /* Make sure the hypervisor sees the complete request */
2396         mb();
2397         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2398                                 cpu_to_be64(remote_handle),
2399                                 ioba, num_entries);
2400
2401         if (rc) {
2402                 if (rc == H_CLOSED)
2403                         dev_warn(dev, "CRQ Queue closed\n");
2404                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2405         }
2406
2407         return rc;
2408 }
2409
2410 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2411                             union ibmvnic_crq *crq)
2412 {
2413         unsigned int ua = adapter->vdev->unit_address;
2414         struct device *dev = &adapter->vdev->dev;
2415         u64 *u64_crq = (u64 *)crq;
2416         int rc;
2417
2418         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2419                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2420                    (unsigned long int)cpu_to_be64(u64_crq[1]));
2421
2422         /* Make sure the hypervisor sees the complete request */
2423         mb();
2424
2425         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2426                                 cpu_to_be64(u64_crq[0]),
2427                                 cpu_to_be64(u64_crq[1]));
2428
2429         if (rc) {
2430                 if (rc == H_CLOSED)
2431                         dev_warn(dev, "CRQ Queue closed\n");
2432                 dev_warn(dev, "Send error (rc=%d)\n", rc);
2433         }
2434
2435         return rc;
2436 }
2437
2438 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2439 {
2440         union ibmvnic_crq crq;
2441
2442         memset(&crq, 0, sizeof(crq));
2443         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2444         crq.generic.cmd = IBMVNIC_CRQ_INIT;
2445         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2446
2447         return ibmvnic_send_crq(adapter, &crq);
2448 }
2449
2450 static int send_version_xchg(struct ibmvnic_adapter *adapter)
2451 {
2452         union ibmvnic_crq crq;
2453
2454         memset(&crq, 0, sizeof(crq));
2455         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2456         crq.version_exchange.cmd = VERSION_EXCHANGE;
2457         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2458
2459         return ibmvnic_send_crq(adapter, &crq);
2460 }
2461
2462 static void send_login(struct ibmvnic_adapter *adapter)
2463 {
2464         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2465         struct ibmvnic_login_buffer *login_buffer;
2466         struct device *dev = &adapter->vdev->dev;
2467         dma_addr_t rsp_buffer_token;
2468         dma_addr_t buffer_token;
2469         size_t rsp_buffer_size;
2470         union ibmvnic_crq crq;
2471         size_t buffer_size;
2472         __be64 *tx_list_p;
2473         __be64 *rx_list_p;
2474         int i;
2475
2476         buffer_size =
2477             sizeof(struct ibmvnic_login_buffer) +
2478             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
2479
2480         login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
2481         if (!login_buffer)
2482                 goto buf_alloc_failed;
2483
2484         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2485                                       DMA_TO_DEVICE);
2486         if (dma_mapping_error(dev, buffer_token)) {
2487                 dev_err(dev, "Couldn't map login buffer\n");
2488                 goto buf_map_failed;
2489         }
2490
2491         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2492                           sizeof(u64) * adapter->req_tx_queues +
2493                           sizeof(u64) * adapter->req_rx_queues +
2494                           sizeof(u64) * adapter->req_rx_queues +
2495                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
2496
2497         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2498         if (!login_rsp_buffer)
2499                 goto buf_rsp_alloc_failed;
2500
2501         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2502                                           rsp_buffer_size, DMA_FROM_DEVICE);
2503         if (dma_mapping_error(dev, rsp_buffer_token)) {
2504                 dev_err(dev, "Couldn't map login rsp buffer\n");
2505                 goto buf_rsp_map_failed;
2506         }
2507
2508         adapter->login_buf = login_buffer;
2509         adapter->login_buf_token = buffer_token;
2510         adapter->login_buf_sz = buffer_size;
2511         adapter->login_rsp_buf = login_rsp_buffer;
2512         adapter->login_rsp_buf_token = rsp_buffer_token;
2513         adapter->login_rsp_buf_sz = rsp_buffer_size;
2514
2515         login_buffer->len = cpu_to_be32(buffer_size);
2516         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2517         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2518         login_buffer->off_txcomp_subcrqs =
2519             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2520         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2521         login_buffer->off_rxcomp_subcrqs =
2522             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2523                         sizeof(u64) * adapter->req_tx_queues);
2524         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2525         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2526
2527         tx_list_p = (__be64 *)((char *)login_buffer +
2528                                       sizeof(struct ibmvnic_login_buffer));
2529         rx_list_p = (__be64 *)((char *)login_buffer +
2530                                       sizeof(struct ibmvnic_login_buffer) +
2531                                       sizeof(u64) * adapter->req_tx_queues);
2532
2533         for (i = 0; i < adapter->req_tx_queues; i++) {
2534                 if (adapter->tx_scrq[i]) {
2535                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2536                                                    crq_num);
2537                 }
2538         }
2539
2540         for (i = 0; i < adapter->req_rx_queues; i++) {
2541                 if (adapter->rx_scrq[i]) {
2542                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2543                                                    crq_num);
2544                 }
2545         }
2546
2547         netdev_dbg(adapter->netdev, "Login Buffer:\n");
2548         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2549                 netdev_dbg(adapter->netdev, "%016lx\n",
2550                            ((unsigned long int *)(adapter->login_buf))[i]);
2551         }
2552
2553         memset(&crq, 0, sizeof(crq));
2554         crq.login.first = IBMVNIC_CRQ_CMD;
2555         crq.login.cmd = LOGIN;
2556         crq.login.ioba = cpu_to_be32(buffer_token);
2557         crq.login.len = cpu_to_be32(buffer_size);
2558         ibmvnic_send_crq(adapter, &crq);
2559
2560         return;
2561
2562 buf_rsp_map_failed:
2563         kfree(login_rsp_buffer);
2564 buf_rsp_alloc_failed:
2565         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2566 buf_map_failed:
2567         kfree(login_buffer);
2568 buf_alloc_failed:
2569         return;
2570 }
2571
2572 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2573                              u32 len, u8 map_id)
2574 {
2575         union ibmvnic_crq crq;
2576
2577         memset(&crq, 0, sizeof(crq));
2578         crq.request_map.first = IBMVNIC_CRQ_CMD;
2579         crq.request_map.cmd = REQUEST_MAP;
2580         crq.request_map.map_id = map_id;
2581         crq.request_map.ioba = cpu_to_be32(addr);
2582         crq.request_map.len = cpu_to_be32(len);
2583         ibmvnic_send_crq(adapter, &crq);
2584 }
2585
2586 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2587 {
2588         union ibmvnic_crq crq;
2589
2590         memset(&crq, 0, sizeof(crq));
2591         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2592         crq.request_unmap.cmd = REQUEST_UNMAP;
2593         crq.request_unmap.map_id = map_id;
2594         ibmvnic_send_crq(adapter, &crq);
2595 }
2596
2597 static void send_map_query(struct ibmvnic_adapter *adapter)
2598 {
2599         union ibmvnic_crq crq;
2600
2601         memset(&crq, 0, sizeof(crq));
2602         crq.query_map.first = IBMVNIC_CRQ_CMD;
2603         crq.query_map.cmd = QUERY_MAP;
2604         ibmvnic_send_crq(adapter, &crq);
2605 }
2606
2607 /* Send a series of CRQs requesting various capabilities of the VNIC server */
2608 static void send_cap_queries(struct ibmvnic_adapter *adapter)
2609 {
2610         union ibmvnic_crq crq;
2611
2612         atomic_set(&adapter->running_cap_crqs, 0);
2613         memset(&crq, 0, sizeof(crq));
2614         crq.query_capability.first = IBMVNIC_CRQ_CMD;
2615         crq.query_capability.cmd = QUERY_CAPABILITY;
2616
2617         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
2618         atomic_inc(&adapter->running_cap_crqs);
2619         ibmvnic_send_crq(adapter, &crq);
2620
2621         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
2622         atomic_inc(&adapter->running_cap_crqs);
2623         ibmvnic_send_crq(adapter, &crq);
2624
2625         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
2626         atomic_inc(&adapter->running_cap_crqs);
2627         ibmvnic_send_crq(adapter, &crq);
2628
2629         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
2630         atomic_inc(&adapter->running_cap_crqs);
2631         ibmvnic_send_crq(adapter, &crq);
2632
2633         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
2634         atomic_inc(&adapter->running_cap_crqs);
2635         ibmvnic_send_crq(adapter, &crq);
2636
2637         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
2638         atomic_inc(&adapter->running_cap_crqs);
2639         ibmvnic_send_crq(adapter, &crq);
2640
2641         crq.query_capability.capability =
2642             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
2643         atomic_inc(&adapter->running_cap_crqs);
2644         ibmvnic_send_crq(adapter, &crq);
2645
2646         crq.query_capability.capability =
2647             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2648         atomic_inc(&adapter->running_cap_crqs);
2649         ibmvnic_send_crq(adapter, &crq);
2650
2651         crq.query_capability.capability =
2652             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2653         atomic_inc(&adapter->running_cap_crqs);
2654         ibmvnic_send_crq(adapter, &crq);
2655
2656         crq.query_capability.capability =
2657             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2658         atomic_inc(&adapter->running_cap_crqs);
2659         ibmvnic_send_crq(adapter, &crq);
2660
2661         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2662         atomic_inc(&adapter->running_cap_crqs);
2663         ibmvnic_send_crq(adapter, &crq);
2664
2665         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2666         atomic_inc(&adapter->running_cap_crqs);
2667         ibmvnic_send_crq(adapter, &crq);
2668
2669         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2670         atomic_inc(&adapter->running_cap_crqs);
2671         ibmvnic_send_crq(adapter, &crq);
2672
2673         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2674         atomic_inc(&adapter->running_cap_crqs);
2675         ibmvnic_send_crq(adapter, &crq);
2676
2677         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2678         atomic_inc(&adapter->running_cap_crqs);
2679         ibmvnic_send_crq(adapter, &crq);
2680
2681         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2682         atomic_inc(&adapter->running_cap_crqs);
2683         ibmvnic_send_crq(adapter, &crq);
2684
2685         crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
2686         atomic_inc(&adapter->running_cap_crqs);
2687         ibmvnic_send_crq(adapter, &crq);
2688
2689         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2690         atomic_inc(&adapter->running_cap_crqs);
2691         ibmvnic_send_crq(adapter, &crq);
2692
2693         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2694         atomic_inc(&adapter->running_cap_crqs);
2695         ibmvnic_send_crq(adapter, &crq);
2696
2697         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2698         atomic_inc(&adapter->running_cap_crqs);
2699         ibmvnic_send_crq(adapter, &crq);
2700
2701         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2702         atomic_inc(&adapter->running_cap_crqs);
2703         ibmvnic_send_crq(adapter, &crq);
2704
2705         crq.query_capability.capability =
2706                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2707         atomic_inc(&adapter->running_cap_crqs);
2708         ibmvnic_send_crq(adapter, &crq);
2709
2710         crq.query_capability.capability =
2711                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2712         atomic_inc(&adapter->running_cap_crqs);
2713         ibmvnic_send_crq(adapter, &crq);
2714
2715         crq.query_capability.capability =
2716                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2717         atomic_inc(&adapter->running_cap_crqs);
2718         ibmvnic_send_crq(adapter, &crq);
2719
2720         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2721         atomic_inc(&adapter->running_cap_crqs);
2722         ibmvnic_send_crq(adapter, &crq);
2723 }
2724
2725 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2726 {
2727         struct device *dev = &adapter->vdev->dev;
2728         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2729         union ibmvnic_crq crq;
2730         int i;
2731
2732         dma_unmap_single(dev, adapter->ip_offload_tok,
2733                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2734
2735         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2736         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2737                 netdev_dbg(adapter->netdev, "%016lx\n",
2738                            ((unsigned long int *)(buf))[i]);
2739
2740         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2741         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2742         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2743                    buf->tcp_ipv4_chksum);
2744         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2745                    buf->tcp_ipv6_chksum);
2746         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2747                    buf->udp_ipv4_chksum);
2748         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2749                    buf->udp_ipv6_chksum);
2750         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2751                    buf->large_tx_ipv4);
2752         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2753                    buf->large_tx_ipv6);
2754         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2755                    buf->large_rx_ipv4);
2756         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2757                    buf->large_rx_ipv6);
2758         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2759                    buf->max_ipv4_header_size);
2760         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2761                    buf->max_ipv6_header_size);
2762         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2763                    buf->max_tcp_header_size);
2764         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2765                    buf->max_udp_header_size);
2766         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2767                    buf->max_large_tx_size);
2768         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2769                    buf->max_large_rx_size);
2770         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2771                    buf->ipv6_extension_header);
2772         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2773                    buf->tcp_pseudosum_req);
2774         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2775                    buf->num_ipv6_ext_headers);
2776         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2777                    buf->off_ipv6_ext_headers);
2778
2779         adapter->ip_offload_ctrl_tok =
2780             dma_map_single(dev, &adapter->ip_offload_ctrl,
2781                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2782
2783         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2784                 dev_err(dev, "Couldn't map ip offload control buffer\n");
2785                 return;
2786         }
2787
2788         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2789         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2790         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2791         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2792         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2793
2794         /* large_tx/rx disabled for now, additional features needed */
2795         adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2796         adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2797         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2798         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2799
2800         adapter->netdev->features = NETIF_F_GSO;
2801
2802         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2803                 adapter->netdev->features |= NETIF_F_IP_CSUM;
2804
2805         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2806                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2807
2808         if ((adapter->netdev->features &
2809             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2810                 adapter->netdev->features |= NETIF_F_RXCSUM;
2811
2812         memset(&crq, 0, sizeof(crq));
2813         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2814         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2815         crq.control_ip_offload.len =
2816             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2817         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2818         ibmvnic_send_crq(adapter, &crq);
2819 }
2820
2821 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2822                                   struct ibmvnic_adapter *adapter)
2823 {
2824         struct device *dev = &adapter->vdev->dev;
2825         struct ibmvnic_error_buff *error_buff, *tmp;
2826         unsigned long flags;
2827         bool found = false;
2828         int i;
2829
2830         if (!crq->request_error_rsp.rc.code) {
2831                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2832                          crq->request_error_rsp.rc.code);
2833                 return;
2834         }
2835
2836         spin_lock_irqsave(&adapter->error_list_lock, flags);
2837         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2838                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2839                         found = true;
2840                         list_del(&error_buff->list);
2841                         break;
2842                 }
2843         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2844
2845         if (!found) {
2846                 dev_err(dev, "Couldn't find error id %x\n",
2847                         be32_to_cpu(crq->request_error_rsp.error_id));
2848                 return;
2849         }
2850
2851         dev_err(dev, "Detailed info for error id %x:",
2852                 be32_to_cpu(crq->request_error_rsp.error_id));
2853
2854         for (i = 0; i < error_buff->len; i++) {
2855                 pr_cont("%02x", (int)error_buff->buff[i]);
2856                 if (i % 8 == 7)
2857                         pr_cont(" ");
2858         }
2859         pr_cont("\n");
2860
2861         dma_unmap_single(dev, error_buff->dma, error_buff->len,
2862                          DMA_FROM_DEVICE);
2863         kfree(error_buff->buff);
2864         kfree(error_buff);
2865 }
2866
2867 static void request_error_information(struct ibmvnic_adapter *adapter,
2868                                       union ibmvnic_crq *err_crq)
2869 {
2870         struct device *dev = &adapter->vdev->dev;
2871         struct net_device *netdev = adapter->netdev;
2872         struct ibmvnic_error_buff *error_buff;
2873         unsigned long timeout = msecs_to_jiffies(30000);
2874         union ibmvnic_crq crq;
2875         unsigned long flags;
2876         int rc, detail_len;
2877
2878         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2879         if (!error_buff)
2880                 return;
2881
2882         detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
2883         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2884         if (!error_buff->buff) {
2885                 kfree(error_buff);
2886                 return;
2887         }
2888
2889         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2890                                          DMA_FROM_DEVICE);
2891         if (dma_mapping_error(dev, error_buff->dma)) {
2892                 netdev_err(netdev, "Couldn't map error buffer\n");
2893                 kfree(error_buff->buff);
2894                 kfree(error_buff);
2895                 return;
2896         }
2897
2898         error_buff->len = detail_len;
2899         error_buff->error_id = err_crq->error_indication.error_id;
2900
2901         spin_lock_irqsave(&adapter->error_list_lock, flags);
2902         list_add_tail(&error_buff->list, &adapter->errors);
2903         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2904
2905         memset(&crq, 0, sizeof(crq));
2906         crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2907         crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2908         crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2909         crq.request_error_info.len = cpu_to_be32(detail_len);
2910         crq.request_error_info.error_id = err_crq->error_indication.error_id;
2911
2912         rc = ibmvnic_send_crq(adapter, &crq);
2913         if (rc) {
2914                 netdev_err(netdev, "failed to request error information\n");
2915                 goto err_info_fail;
2916         }
2917
2918         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
2919                 netdev_err(netdev, "timeout waiting for error information\n");
2920                 goto err_info_fail;
2921         }
2922
2923         return;
2924
2925 err_info_fail:
2926         spin_lock_irqsave(&adapter->error_list_lock, flags);
2927         list_del(&error_buff->list);
2928         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2929
2930         kfree(error_buff->buff);
2931         kfree(error_buff);
2932 }
2933
2934 static void handle_error_indication(union ibmvnic_crq *crq,
2935                                     struct ibmvnic_adapter *adapter)
2936 {
2937         struct device *dev = &adapter->vdev->dev;
2938
2939         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2940                 crq->error_indication.flags
2941                         & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2942                 be32_to_cpu(crq->error_indication.error_id),
2943                 be16_to_cpu(crq->error_indication.error_cause));
2944
2945         if (be32_to_cpu(crq->error_indication.error_id))
2946                 request_error_information(adapter, crq);
2947
2948         if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
2949                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
2950         else
2951                 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
2952 }
2953
2954 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2955                                   struct ibmvnic_adapter *adapter)
2956 {
2957         struct net_device *netdev = adapter->netdev;
2958         struct device *dev = &adapter->vdev->dev;
2959         long rc;
2960
2961         rc = crq->change_mac_addr_rsp.rc.code;
2962         if (rc) {
2963                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2964                 return;
2965         }
2966         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2967                ETH_ALEN);
2968 }
2969
2970 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2971                                    struct ibmvnic_adapter *adapter)
2972 {
2973         struct device *dev = &adapter->vdev->dev;
2974         u64 *req_value;
2975         char *name;
2976
2977         atomic_dec(&adapter->running_cap_crqs);
2978         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2979         case REQ_TX_QUEUES:
2980                 req_value = &adapter->req_tx_queues;
2981                 name = "tx";
2982                 break;
2983         case REQ_RX_QUEUES:
2984                 req_value = &adapter->req_rx_queues;
2985                 name = "rx";
2986                 break;
2987         case REQ_RX_ADD_QUEUES:
2988                 req_value = &adapter->req_rx_add_queues;
2989                 name = "rx_add";
2990                 break;
2991         case REQ_TX_ENTRIES_PER_SUBCRQ:
2992                 req_value = &adapter->req_tx_entries_per_subcrq;
2993                 name = "tx_entries_per_subcrq";
2994                 break;
2995         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2996                 req_value = &adapter->req_rx_add_entries_per_subcrq;
2997                 name = "rx_add_entries_per_subcrq";
2998                 break;
2999         case REQ_MTU:
3000                 req_value = &adapter->req_mtu;
3001                 name = "mtu";
3002                 break;
3003         case PROMISC_REQUESTED:
3004                 req_value = &adapter->promisc;
3005                 name = "promisc";
3006                 break;
3007         default:
3008                 dev_err(dev, "Got invalid cap request rsp %d\n",
3009                         crq->request_capability.capability);
3010                 return;
3011         }
3012
3013         switch (crq->request_capability_rsp.rc.code) {
3014         case SUCCESS:
3015                 break;
3016         case PARTIALSUCCESS:
3017                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3018                          *req_value,
3019                          (long int)be64_to_cpu(crq->request_capability_rsp.
3020                                                number), name);
3021                 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
3022                 ibmvnic_send_req_caps(adapter, 1);
3023                 return;
3024         default:
3025                 dev_err(dev, "Error %d in request cap rsp\n",
3026                         crq->request_capability_rsp.rc.code);
3027                 return;
3028         }
3029
3030         /* Done receiving requested capabilities, query IP offload support */
3031         if (atomic_read(&adapter->running_cap_crqs) == 0) {
3032                 union ibmvnic_crq newcrq;
3033                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3034                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3035                     &adapter->ip_offload_buf;
3036
3037                 adapter->wait_capability = false;
3038                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3039                                                          buf_sz,
3040                                                          DMA_FROM_DEVICE);
3041
3042                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3043                         if (!firmware_has_feature(FW_FEATURE_CMO))
3044                                 dev_err(dev, "Couldn't map offload buffer\n");
3045                         return;
3046                 }
3047
3048                 memset(&newcrq, 0, sizeof(newcrq));
3049                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3050                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3051                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3052                 newcrq.query_ip_offload.ioba =
3053                     cpu_to_be32(adapter->ip_offload_tok);
3054
3055                 ibmvnic_send_crq(adapter, &newcrq);
3056         }
3057 }
3058
3059 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3060                             struct ibmvnic_adapter *adapter)
3061 {
3062         struct device *dev = &adapter->vdev->dev;
3063         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3064         struct ibmvnic_login_buffer *login = adapter->login_buf;
3065         int i;
3066
3067         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3068                          DMA_BIDIRECTIONAL);
3069         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3070                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3071
3072         /* If the number of queues requested can't be allocated by the
3073          * server, the login response will return with code 1. We will need
3074          * to resend the login buffer with fewer queues requested.
3075          */
3076         if (login_rsp_crq->generic.rc.code) {
3077                 adapter->renegotiate = true;
3078                 complete(&adapter->init_done);
3079                 return 0;
3080         }
3081
3082         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3083         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3084                 netdev_dbg(adapter->netdev, "%016lx\n",
3085                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3086         }
3087
3088         /* Sanity checks */
3089         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3090             (be32_to_cpu(login->num_rxcomp_subcrqs) *
3091              adapter->req_rx_add_queues !=
3092              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3093                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3094                 ibmvnic_remove(adapter->vdev);
3095                 return -EIO;
3096         }
3097         complete(&adapter->init_done);
3098
3099         return 0;
3100 }
3101
3102 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3103                                      struct ibmvnic_adapter *adapter)
3104 {
3105         struct device *dev = &adapter->vdev->dev;
3106         long rc;
3107
3108         rc = crq->request_unmap_rsp.rc.code;
3109         if (rc)
3110                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3111 }
3112
3113 static void handle_query_map_rsp(union ibmvnic_crq *crq,
3114                                  struct ibmvnic_adapter *adapter)
3115 {
3116         struct net_device *netdev = adapter->netdev;
3117         struct device *dev = &adapter->vdev->dev;
3118         long rc;
3119
3120         rc = crq->query_map_rsp.rc.code;
3121         if (rc) {
3122                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3123                 return;
3124         }
3125         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3126                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3127                    crq->query_map_rsp.free_pages);
3128 }
3129
3130 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3131                                  struct ibmvnic_adapter *adapter)
3132 {
3133         struct net_device *netdev = adapter->netdev;
3134         struct device *dev = &adapter->vdev->dev;
3135         long rc;
3136
3137         atomic_dec(&adapter->running_cap_crqs);
3138         netdev_dbg(netdev, "Outstanding queries: %d\n",
3139                    atomic_read(&adapter->running_cap_crqs));
3140         rc = crq->query_capability.rc.code;
3141         if (rc) {
3142                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3143                 goto out;
3144         }
3145
3146         switch (be16_to_cpu(crq->query_capability.capability)) {
3147         case MIN_TX_QUEUES:
3148                 adapter->min_tx_queues =
3149                     be64_to_cpu(crq->query_capability.number);
3150                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3151                            adapter->min_tx_queues);
3152                 break;
3153         case MIN_RX_QUEUES:
3154                 adapter->min_rx_queues =
3155                     be64_to_cpu(crq->query_capability.number);
3156                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3157                            adapter->min_rx_queues);
3158                 break;
3159         case MIN_RX_ADD_QUEUES:
3160                 adapter->min_rx_add_queues =
3161                     be64_to_cpu(crq->query_capability.number);
3162                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3163                            adapter->min_rx_add_queues);
3164                 break;
3165         case MAX_TX_QUEUES:
3166                 adapter->max_tx_queues =
3167                     be64_to_cpu(crq->query_capability.number);
3168                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3169                            adapter->max_tx_queues);
3170                 break;
3171         case MAX_RX_QUEUES:
3172                 adapter->max_rx_queues =
3173                     be64_to_cpu(crq->query_capability.number);
3174                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3175                            adapter->max_rx_queues);
3176                 break;
3177         case MAX_RX_ADD_QUEUES:
3178                 adapter->max_rx_add_queues =
3179                     be64_to_cpu(crq->query_capability.number);
3180                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3181                            adapter->max_rx_add_queues);
3182                 break;
3183         case MIN_TX_ENTRIES_PER_SUBCRQ:
3184                 adapter->min_tx_entries_per_subcrq =
3185                     be64_to_cpu(crq->query_capability.number);
3186                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3187                            adapter->min_tx_entries_per_subcrq);
3188                 break;
3189         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3190                 adapter->min_rx_add_entries_per_subcrq =
3191                     be64_to_cpu(crq->query_capability.number);
3192                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3193                            adapter->min_rx_add_entries_per_subcrq);
3194                 break;
3195         case MAX_TX_ENTRIES_PER_SUBCRQ:
3196                 adapter->max_tx_entries_per_subcrq =
3197                     be64_to_cpu(crq->query_capability.number);
3198                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3199                            adapter->max_tx_entries_per_subcrq);
3200                 break;
3201         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3202                 adapter->max_rx_add_entries_per_subcrq =
3203                     be64_to_cpu(crq->query_capability.number);
3204                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3205                            adapter->max_rx_add_entries_per_subcrq);
3206                 break;
3207         case TCP_IP_OFFLOAD:
3208                 adapter->tcp_ip_offload =
3209                     be64_to_cpu(crq->query_capability.number);
3210                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3211                            adapter->tcp_ip_offload);
3212                 break;
3213         case PROMISC_SUPPORTED:
3214                 adapter->promisc_supported =
3215                     be64_to_cpu(crq->query_capability.number);
3216                 netdev_dbg(netdev, "promisc_supported = %lld\n",
3217                            adapter->promisc_supported);
3218                 break;
3219         case MIN_MTU:
3220                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3221                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3222                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3223                 break;
3224         case MAX_MTU:
3225                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3226                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3227                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3228                 break;
3229         case MAX_MULTICAST_FILTERS:
3230                 adapter->max_multicast_filters =
3231                     be64_to_cpu(crq->query_capability.number);
3232                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3233                            adapter->max_multicast_filters);
3234                 break;
3235         case VLAN_HEADER_INSERTION:
3236                 adapter->vlan_header_insertion =
3237                     be64_to_cpu(crq->query_capability.number);
3238                 if (adapter->vlan_header_insertion)
3239                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3240                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3241                            adapter->vlan_header_insertion);
3242                 break;
3243         case RX_VLAN_HEADER_INSERTION:
3244                 adapter->rx_vlan_header_insertion =
3245                     be64_to_cpu(crq->query_capability.number);
3246                 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3247                            adapter->rx_vlan_header_insertion);
3248                 break;
3249         case MAX_TX_SG_ENTRIES:
3250                 adapter->max_tx_sg_entries =
3251                     be64_to_cpu(crq->query_capability.number);
3252                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3253                            adapter->max_tx_sg_entries);
3254                 break;
3255         case RX_SG_SUPPORTED:
3256                 adapter->rx_sg_supported =
3257                     be64_to_cpu(crq->query_capability.number);
3258                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3259                            adapter->rx_sg_supported);
3260                 break;
3261         case OPT_TX_COMP_SUB_QUEUES:
3262                 adapter->opt_tx_comp_sub_queues =
3263                     be64_to_cpu(crq->query_capability.number);
3264                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3265                            adapter->opt_tx_comp_sub_queues);
3266                 break;
3267         case OPT_RX_COMP_QUEUES:
3268                 adapter->opt_rx_comp_queues =
3269                     be64_to_cpu(crq->query_capability.number);
3270                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3271                            adapter->opt_rx_comp_queues);
3272                 break;
3273         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3274                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
3275                     be64_to_cpu(crq->query_capability.number);
3276                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3277                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
3278                 break;
3279         case OPT_TX_ENTRIES_PER_SUBCRQ:
3280                 adapter->opt_tx_entries_per_subcrq =
3281                     be64_to_cpu(crq->query_capability.number);
3282                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3283                            adapter->opt_tx_entries_per_subcrq);
3284                 break;
3285         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3286                 adapter->opt_rxba_entries_per_subcrq =
3287                     be64_to_cpu(crq->query_capability.number);
3288                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3289                            adapter->opt_rxba_entries_per_subcrq);
3290                 break;
3291         case TX_RX_DESC_REQ:
3292                 adapter->tx_rx_desc_req = crq->query_capability.number;
3293                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3294                            adapter->tx_rx_desc_req);
3295                 break;
3296
3297         default:
3298                 netdev_err(netdev, "Got invalid cap rsp %d\n",
3299                            crq->query_capability.capability);
3300         }
3301
3302 out:
3303         if (atomic_read(&adapter->running_cap_crqs) == 0) {
3304                 adapter->wait_capability = false;
3305                 ibmvnic_send_req_caps(adapter, 0);
3306         }
3307 }
3308
3309 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3310                                struct ibmvnic_adapter *adapter)
3311 {
3312         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3313         struct net_device *netdev = adapter->netdev;
3314         struct device *dev = &adapter->vdev->dev;
3315         u64 *u64_crq = (u64 *)crq;
3316         long rc;
3317
3318         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3319                    (unsigned long int)cpu_to_be64(u64_crq[0]),
3320                    (unsigned long int)cpu_to_be64(u64_crq[1]));
3321         switch (gen_crq->first) {
3322         case IBMVNIC_CRQ_INIT_RSP:
3323                 switch (gen_crq->cmd) {
3324                 case IBMVNIC_CRQ_INIT:
3325                         dev_info(dev, "Partner initialized\n");
3326                         adapter->from_passive_init = true;
3327                         complete(&adapter->init_done);
3328                         break;
3329                 case IBMVNIC_CRQ_INIT_COMPLETE:
3330                         dev_info(dev, "Partner initialization complete\n");
3331                         send_version_xchg(adapter);
3332                         break;
3333                 default:
3334                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3335                 }
3336                 return;
3337         case IBMVNIC_CRQ_XPORT_EVENT:
3338                 netif_carrier_off(netdev);
3339                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3340                         dev_info(dev, "Migrated, re-enabling adapter\n");
3341                         ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
3342                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3343                         dev_info(dev, "Backing device failover detected\n");
3344                         ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
3345                 } else {
3346                         /* The adapter lost the connection */
3347                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3348                                 gen_crq->cmd);
3349                         ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3350                 }
3351                 return;
3352         case IBMVNIC_CRQ_CMD_RSP:
3353                 break;
3354         default:
3355                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3356                         gen_crq->first);
3357                 return;
3358         }
3359
3360         switch (gen_crq->cmd) {
3361         case VERSION_EXCHANGE_RSP:
3362                 rc = crq->version_exchange_rsp.rc.code;
3363                 if (rc) {
3364                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3365                         break;
3366                 }
3367                 dev_info(dev, "Partner protocol version is %d\n",
3368                          crq->version_exchange_rsp.version);
3369                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3370                     ibmvnic_version)
3371                         ibmvnic_version =
3372                             be16_to_cpu(crq->version_exchange_rsp.version);
3373                 send_cap_queries(adapter);
3374                 break;
3375         case QUERY_CAPABILITY_RSP:
3376                 handle_query_cap_rsp(crq, adapter);
3377                 break;
3378         case QUERY_MAP_RSP:
3379                 handle_query_map_rsp(crq, adapter);
3380                 break;
3381         case REQUEST_MAP_RSP:
3382                 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
3383                 complete(&adapter->fw_done);
3384                 break;
3385         case REQUEST_UNMAP_RSP:
3386                 handle_request_unmap_rsp(crq, adapter);
3387                 break;
3388         case REQUEST_CAPABILITY_RSP:
3389                 handle_request_cap_rsp(crq, adapter);
3390                 break;
3391         case LOGIN_RSP:
3392                 netdev_dbg(netdev, "Got Login Response\n");
3393                 handle_login_rsp(crq, adapter);
3394                 break;
3395         case LOGICAL_LINK_STATE_RSP:
3396                 netdev_dbg(netdev,
3397                            "Got Logical Link State Response, state: %d rc: %d\n",
3398                            crq->logical_link_state_rsp.link_state,
3399                            crq->logical_link_state_rsp.rc.code);
3400                 adapter->logical_link_state =
3401                     crq->logical_link_state_rsp.link_state;
3402                 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3403                 complete(&adapter->init_done);
3404                 break;
3405         case LINK_STATE_INDICATION:
3406                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3407                 adapter->phys_link_state =
3408                     crq->link_state_indication.phys_link_state;
3409                 adapter->logical_link_state =
3410                     crq->link_state_indication.logical_link_state;
3411                 break;
3412         case CHANGE_MAC_ADDR_RSP:
3413                 netdev_dbg(netdev, "Got MAC address change Response\n");
3414                 handle_change_mac_rsp(crq, adapter);
3415                 break;
3416         case ERROR_INDICATION:
3417                 netdev_dbg(netdev, "Got Error Indication\n");
3418                 handle_error_indication(crq, adapter);
3419                 break;
3420         case REQUEST_ERROR_RSP:
3421                 netdev_dbg(netdev, "Got Error Detail Response\n");
3422                 handle_error_info_rsp(crq, adapter);
3423                 break;
3424         case REQUEST_STATISTICS_RSP:
3425                 netdev_dbg(netdev, "Got Statistics Response\n");
3426                 complete(&adapter->stats_done);
3427                 break;
3428         case QUERY_IP_OFFLOAD_RSP:
3429                 netdev_dbg(netdev, "Got Query IP offload Response\n");
3430                 handle_query_ip_offload_rsp(adapter);
3431                 break;
3432         case MULTICAST_CTRL_RSP:
3433                 netdev_dbg(netdev, "Got multicast control Response\n");
3434                 break;
3435         case CONTROL_IP_OFFLOAD_RSP:
3436                 netdev_dbg(netdev, "Got Control IP offload Response\n");
3437                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3438                                  sizeof(adapter->ip_offload_ctrl),
3439                                  DMA_TO_DEVICE);
3440                 complete(&adapter->init_done);
3441                 break;
3442         case COLLECT_FW_TRACE_RSP:
3443                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3444                 complete(&adapter->fw_done);
3445                 break;
3446         default:
3447                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3448                            gen_crq->cmd);
3449         }
3450 }
3451
3452 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3453 {
3454         struct ibmvnic_adapter *adapter = instance;
3455
3456         tasklet_schedule(&adapter->tasklet);
3457         return IRQ_HANDLED;
3458 }
3459
3460 static void ibmvnic_tasklet(void *data)
3461 {
3462         struct ibmvnic_adapter *adapter = data;
3463         struct ibmvnic_crq_queue *queue = &adapter->crq;
3464         union ibmvnic_crq *crq;
3465         unsigned long flags;
3466         bool done = false;
3467
3468         spin_lock_irqsave(&queue->lock, flags);
3469         while (!done) {
3470                 /* Pull all the valid messages off the CRQ */
3471                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3472                         ibmvnic_handle_crq(crq, adapter);
3473                         crq->generic.first = 0;
3474                 }
3475
3476                 /* remain in tasklet until all
3477                  * capabilities responses are received
3478                  */
3479                 if (!adapter->wait_capability)
3480                         done = true;
3481         }
3482         /* if capabilities CRQ's were sent in this tasklet, the following
3483          * tasklet must wait until all responses are received
3484          */
3485         if (atomic_read(&adapter->running_cap_crqs) != 0)
3486                 adapter->wait_capability = true;
3487         spin_unlock_irqrestore(&queue->lock, flags);
3488 }
3489
3490 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3491 {
3492         struct vio_dev *vdev = adapter->vdev;
3493         int rc;
3494
3495         do {
3496                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3497         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3498
3499         if (rc)
3500                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3501
3502         return rc;
3503 }
3504
3505 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3506 {
3507         struct ibmvnic_crq_queue *crq = &adapter->crq;
3508         struct device *dev = &adapter->vdev->dev;
3509         struct vio_dev *vdev = adapter->vdev;
3510         int rc;
3511
3512         /* Close the CRQ */
3513         do {
3514                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3515         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3516
3517         /* Clean out the queue */
3518         memset(crq->msgs, 0, PAGE_SIZE);
3519         crq->cur = 0;
3520
3521         /* And re-open it again */
3522         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3523                                 crq->msg_token, PAGE_SIZE);
3524
3525         if (rc == H_CLOSED)
3526                 /* Adapter is good, but other end is not ready */
3527                 dev_warn(dev, "Partner adapter not ready\n");
3528         else if (rc != 0)
3529                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3530
3531         return rc;
3532 }
3533
3534 static void release_crq_queue(struct ibmvnic_adapter *adapter)
3535 {
3536         struct ibmvnic_crq_queue *crq = &adapter->crq;
3537         struct vio_dev *vdev = adapter->vdev;
3538         long rc;
3539
3540         if (!crq->msgs)
3541                 return;
3542
3543         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3544         free_irq(vdev->irq, adapter);
3545         tasklet_kill(&adapter->tasklet);
3546         do {
3547                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3548         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3549
3550         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3551                          DMA_BIDIRECTIONAL);
3552         free_page((unsigned long)crq->msgs);
3553         crq->msgs = NULL;
3554 }
3555
3556 static int init_crq_queue(struct ibmvnic_adapter *adapter)
3557 {
3558         struct ibmvnic_crq_queue *crq = &adapter->crq;
3559         struct device *dev = &adapter->vdev->dev;
3560         struct vio_dev *vdev = adapter->vdev;
3561         int rc, retrc = -ENOMEM;
3562
3563         if (crq->msgs)
3564                 return 0;
3565
3566         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3567         /* Should we allocate more than one page? */
3568
3569         if (!crq->msgs)
3570                 return -ENOMEM;
3571
3572         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3573         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3574                                         DMA_BIDIRECTIONAL);
3575         if (dma_mapping_error(dev, crq->msg_token))
3576                 goto map_failed;
3577
3578         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3579                                 crq->msg_token, PAGE_SIZE);
3580
3581         if (rc == H_RESOURCE)
3582                 /* maybe kexecing and resource is busy. try a reset */
3583                 rc = ibmvnic_reset_crq(adapter);
3584         retrc = rc;
3585
3586         if (rc == H_CLOSED) {
3587                 dev_warn(dev, "Partner adapter not ready\n");
3588         } else if (rc) {
3589                 dev_warn(dev, "Error %d opening adapter\n", rc);
3590                 goto reg_crq_failed;
3591         }
3592
3593         retrc = 0;
3594
3595         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3596                      (unsigned long)adapter);
3597
3598         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3599         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3600                          adapter);
3601         if (rc) {
3602                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3603                         vdev->irq, rc);
3604                 goto req_irq_failed;
3605         }
3606
3607         rc = vio_enable_interrupts(vdev);
3608         if (rc) {
3609                 dev_err(dev, "Error %d enabling interrupts\n", rc);
3610                 goto req_irq_failed;
3611         }
3612
3613         crq->cur = 0;
3614         spin_lock_init(&crq->lock);
3615
3616         return retrc;
3617
3618 req_irq_failed:
3619         tasklet_kill(&adapter->tasklet);
3620         do {
3621                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3622         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3623 reg_crq_failed:
3624         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3625 map_failed:
3626         free_page((unsigned long)crq->msgs);
3627         crq->msgs = NULL;
3628         return retrc;
3629 }
3630
3631 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
3632 {
3633         struct device *dev = &adapter->vdev->dev;
3634         unsigned long timeout = msecs_to_jiffies(30000);
3635         int rc;
3636
3637         if (adapter->resetting) {
3638                 rc = ibmvnic_reset_crq(adapter);
3639                 if (!rc)
3640                         rc = vio_enable_interrupts(adapter->vdev);
3641         } else {
3642                 rc = init_crq_queue(adapter);
3643         }
3644
3645         if (rc) {
3646                 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3647                 return rc;
3648         }
3649
3650         adapter->from_passive_init = false;
3651
3652         init_completion(&adapter->init_done);
3653         adapter->init_done_rc = 0;
3654         ibmvnic_send_crq_init(adapter);
3655         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3656                 dev_err(dev, "Initialization sequence timed out\n");
3657                 return -1;
3658         }
3659
3660         if (adapter->init_done_rc) {
3661                 release_crq_queue(adapter);
3662                 return adapter->init_done_rc;
3663         }
3664
3665         if (adapter->from_passive_init) {
3666                 adapter->state = VNIC_OPEN;
3667                 adapter->from_passive_init = false;
3668                 return -1;
3669         }
3670
3671         if (adapter->resetting)
3672                 rc = reset_sub_crq_queues(adapter);
3673         else
3674                 rc = init_sub_crqs(adapter);
3675         if (rc) {
3676                 dev_err(dev, "Initialization of sub crqs failed\n");
3677                 release_crq_queue(adapter);
3678                 return rc;
3679         }
3680
3681         rc = init_sub_crq_irqs(adapter);
3682         if (rc) {
3683                 dev_err(dev, "Failed to initialize sub crq irqs\n");
3684                 release_crq_queue(adapter);
3685         }
3686
3687         return rc;
3688 }
3689
3690 static struct device_attribute dev_attr_failover;
3691
3692 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3693 {
3694         struct ibmvnic_adapter *adapter;
3695         struct net_device *netdev;
3696         unsigned char *mac_addr_p;
3697         int rc;
3698
3699         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3700                 dev->unit_address);
3701
3702         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3703                                                         VETH_MAC_ADDR, NULL);
3704         if (!mac_addr_p) {
3705                 dev_err(&dev->dev,
3706                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3707                         __FILE__, __LINE__);
3708                 return 0;
3709         }
3710
3711         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3712                                    IBMVNIC_MAX_TX_QUEUES);
3713         if (!netdev)
3714                 return -ENOMEM;
3715
3716         adapter = netdev_priv(netdev);
3717         adapter->state = VNIC_PROBING;
3718         dev_set_drvdata(&dev->dev, netdev);
3719         adapter->vdev = dev;
3720         adapter->netdev = netdev;
3721
3722         ether_addr_copy(adapter->mac_addr, mac_addr_p);
3723         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3724         netdev->irq = dev->irq;
3725         netdev->netdev_ops = &ibmvnic_netdev_ops;
3726         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3727         SET_NETDEV_DEV(netdev, &dev->dev);
3728
3729         spin_lock_init(&adapter->stats_lock);
3730
3731         INIT_LIST_HEAD(&adapter->errors);
3732         spin_lock_init(&adapter->error_list_lock);
3733
3734         INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
3735         INIT_LIST_HEAD(&adapter->rwi_list);
3736         mutex_init(&adapter->reset_lock);
3737         mutex_init(&adapter->rwi_lock);
3738         adapter->resetting = false;
3739
3740         do {
3741                 rc = ibmvnic_init(adapter);
3742                 if (rc && rc != EAGAIN) {
3743                         free_netdev(netdev);
3744                         return rc;
3745                 }
3746         } while (rc == EAGAIN);
3747
3748         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3749
3750         rc = device_create_file(&dev->dev, &dev_attr_failover);
3751         if (rc) {
3752                 free_netdev(netdev);
3753                 return rc;
3754         }
3755
3756         rc = register_netdev(netdev);
3757         if (rc) {
3758                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3759                 device_remove_file(&dev->dev, &dev_attr_failover);
3760                 free_netdev(netdev);
3761                 return rc;
3762         }
3763         dev_info(&dev->dev, "ibmvnic registered\n");
3764
3765         adapter->state = VNIC_PROBED;
3766         return 0;
3767 }
3768
3769 static int ibmvnic_remove(struct vio_dev *dev)
3770 {
3771         struct net_device *netdev = dev_get_drvdata(&dev->dev);
3772         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3773
3774         adapter->state = VNIC_REMOVING;
3775         unregister_netdev(netdev);
3776         mutex_lock(&adapter->reset_lock);
3777
3778         release_resources(adapter);
3779         release_sub_crqs(adapter);
3780         release_crq_queue(adapter);
3781
3782         adapter->state = VNIC_REMOVED;
3783
3784         mutex_unlock(&adapter->reset_lock);
3785         device_remove_file(&dev->dev, &dev_attr_failover);
3786         free_netdev(netdev);
3787         dev_set_drvdata(&dev->dev, NULL);
3788
3789         return 0;
3790 }
3791
3792 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
3793                               const char *buf, size_t count)
3794 {
3795         struct net_device *netdev = dev_get_drvdata(dev);
3796         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3797         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
3798         __be64 session_token;
3799         long rc;
3800
3801         if (!sysfs_streq(buf, "1"))
3802                 return -EINVAL;
3803
3804         rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
3805                          H_GET_SESSION_TOKEN, 0, 0, 0);
3806         if (rc) {
3807                 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
3808                            rc);
3809                 return -EINVAL;
3810         }
3811
3812         session_token = (__be64)retbuf[0];
3813         netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
3814                    be64_to_cpu(session_token));
3815         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3816                                 H_SESSION_ERR_DETECTED, session_token, 0, 0);
3817         if (rc) {
3818                 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
3819                            rc);
3820                 return -EINVAL;
3821         }
3822
3823         return count;
3824 }
3825
3826 static DEVICE_ATTR(failover, 0200, NULL, failover_store);
3827
3828 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3829 {
3830         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3831         struct ibmvnic_adapter *adapter;
3832         struct iommu_table *tbl;
3833         unsigned long ret = 0;
3834         int i;
3835
3836         tbl = get_iommu_table_base(&vdev->dev);
3837
3838         /* netdev inits at probe time along with the structures we need below*/
3839         if (!netdev)
3840                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3841
3842         adapter = netdev_priv(netdev);
3843
3844         ret += PAGE_SIZE; /* the crq message queue */
3845         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3846
3847         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3848                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3849
3850         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3851              i++)
3852                 ret += adapter->rx_pool[i].size *
3853                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3854
3855         return ret;
3856 }
3857
3858 static int ibmvnic_resume(struct device *dev)
3859 {
3860         struct net_device *netdev = dev_get_drvdata(dev);
3861         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3862         int i;
3863
3864         if (adapter->state != VNIC_OPEN)
3865                 return 0;
3866
3867         /* kick the interrupt handlers just in case we lost an interrupt */
3868         for (i = 0; i < adapter->req_rx_queues; i++)
3869                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3870                                      adapter->rx_scrq[i]);
3871
3872         return 0;
3873 }
3874
3875 static struct vio_device_id ibmvnic_device_table[] = {
3876         {"network", "IBM,vnic"},
3877         {"", "" }
3878 };
3879 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3880
3881 static const struct dev_pm_ops ibmvnic_pm_ops = {
3882         .resume = ibmvnic_resume
3883 };
3884
3885 static struct vio_driver ibmvnic_driver = {
3886         .id_table       = ibmvnic_device_table,
3887         .probe          = ibmvnic_probe,
3888         .remove         = ibmvnic_remove,
3889         .get_desired_dma = ibmvnic_get_desired_dma,
3890         .name           = ibmvnic_driver_name,
3891         .pm             = &ibmvnic_pm_ops,
3892 };
3893
3894 /* module functions */
3895 static int __init ibmvnic_module_init(void)
3896 {
3897         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3898                 IBMVNIC_DRIVER_VERSION);
3899
3900         return vio_register_driver(&ibmvnic_driver);
3901 }
3902
3903 static void __exit ibmvnic_module_exit(void)
3904 {
3905         vio_unregister_driver(&ibmvnic_driver);
3906 }
3907
3908 module_init(ibmvnic_module_init);
3909 module_exit(ibmvnic_module_exit);