drivers/net/ethernet/ibm/ibmvnic.c

   1 /**************************************************************************/
   2 /*                                                                        */
   3 /*  IBM System i and System p Virtual NIC Device Driver                   */
   4 /*  Copyright (C) 2014 IBM Corp.                                          */
   5 /*  Santiago Leon (santi_leon@yahoo.com)                                  */
   6 /*  Thomas Falcon (tlfalcon@linux.vnet.ibm.com)                           */
   7 /*  John Allen (jallen@linux.vnet.ibm.com)                                */
   8 /*                                                                        */
   9 /*  This program is free software; you can redistribute it and/or modify  */
  10 /*  it under the terms of the GNU General Public License as published by  */
  11 /*  the Free Software Foundation; either version 2 of the License, or     */
  12 /*  (at your option) any later version.                                   */
  13 /*                                                                        */
  14 /*  This program is distributed in the hope that it will be useful,       */
  15 /*  but WITHOUT ANY WARRANTY; without even the implied warranty of        */
  16 /*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         */
  17 /*  GNU General Public License for more details.                          */
  18 /*                                                                        */
  19 /*  You should have received a copy of the GNU General Public License     */
  20 /*  along with this program.                                              */
  21 /*                                                                        */
  22 /* This module contains the implementation of a virtual ethernet device   */
  23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN    */
  24 /* option of the RS/6000 Platform Architecture to interface with virtual  */
  25 /* ethernet NICs that are presented to the partition by the hypervisor.   */
  26 /*                                                                         */
  27 /* Messages are passed between the VNIC driver and the VNIC server using  */
  28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to  */
  29 /* issue and receive commands that initiate communication with the server */
  30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but    */
  31 /* are used by the driver to notify the server that a packet is           */
  32 /* ready for transmission or that a buffer has been added to receive a    */
  33 /* packet. Subsequently, sCRQs are used by the server to notify the       */
  34 /* driver that a packet transmission has been completed or that a packet  */
  35 /* has been received and placed in a waiting buffer.                      */
  36 /*                                                                        */
  37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in    */
  38 /* which skbs are DMA mapped and immediately unmapped when the transmit   */
  39 /* or receive has been completed, the VNIC driver is required to use      */
  40 /* "long term mapping". This entails that large, continuous DMA mapped    */
  41 /* buffers are allocated on driver initialization and these buffers are   */
  42 /* then continuously reused to pass skbs to and from the VNIC server.     */
  43 /*                                                                        */
  44 /**************************************************************************/
  45
  46 #include <linux/module.h>
  47 #include <linux/moduleparam.h>
  48 #include <linux/types.h>
  49 #include <linux/errno.h>
  50 #include <linux/completion.h>
  51 #include <linux/ioport.h>
  52 #include <linux/dma-mapping.h>
  53 #include <linux/kernel.h>
  54 #include <linux/netdevice.h>
  55 #include <linux/etherdevice.h>
  56 #include <linux/skbuff.h>
  57 #include <linux/init.h>
  58 #include <linux/delay.h>
  59 #include <linux/mm.h>
  60 #include <linux/ethtool.h>
  61 #include <linux/proc_fs.h>
  62 #include <linux/in.h>
  63 #include <linux/ip.h>
  64 #include <linux/ipv6.h>
  65 #include <linux/irq.h>
  66 #include <linux/kthread.h>
  67 #include <linux/seq_file.h>
  68 #include <linux/debugfs.h>
  69 #include <linux/interrupt.h>
  70 #include <net/net_namespace.h>
  71 #include <asm/hvcall.h>
  72 #include <linux/atomic.h>
  73 #include <asm/vio.h>
  74 #include <asm/iommu.h>
  75 #include <linux/uaccess.h>
  76 #include <asm/firmware.h>
  77 #include <linux/workqueue.h>
  78
  79 #include "ibmvnic.h"
  80
  81 static const char ibmvnic_driver_name[] = "ibmvnic";
  82 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  83
  84 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
  85 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  86 MODULE_LICENSE("GPL");
  87 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  88
  89 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  90 static int ibmvnic_remove(struct vio_dev *);
  91 static void release_sub_crqs(struct ibmvnic_adapter *);
  92 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *);
  93 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  94 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  95 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  96 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  97 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  98                        union sub_crq *sub_crq);
  99 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
 100 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
 101 static int enable_scrq_irq(struct ibmvnic_adapter *,
 102                            struct ibmvnic_sub_crq_queue *);
 103 static int disable_scrq_irq(struct ibmvnic_adapter *,
 104                             struct ibmvnic_sub_crq_queue *);
 105 static int pending_scrq(struct ibmvnic_adapter *,
 106                         struct ibmvnic_sub_crq_queue *);
 107 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
 108                                         struct ibmvnic_sub_crq_queue *);
 109 static int ibmvnic_poll(struct napi_struct *napi, int data);
 110 static void send_map_query(struct ibmvnic_adapter *adapter);
 111 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 112 static void send_request_unmap(struct ibmvnic_adapter *, u8);
 113
 114 struct ibmvnic_stat {
 115         char name[ETH_GSTRING_LEN];
 116         int offset;
 117 };
 118
 119 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 120                              offsetof(struct ibmvnic_statistics, stat))
 121 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 122
 123 static const struct ibmvnic_stat ibmvnic_stats[] = {
 124         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 125         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 126         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 127         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 128         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 129         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 130         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 131         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 132         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 133         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 134         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 135         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 136         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 137         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 138         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 139         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 140         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 141         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 142         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 143         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 144         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 145         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 146 };
 147
 148 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 149                           unsigned long length, unsigned long *number,
 150                           unsigned long *irq)
 151 {
 152         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 153         long rc;
 154
 155         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 156         *number = retbuf[0];
 157         *irq = retbuf[1];
 158
 159         return rc;
 160 }
 161
 162 /* net_device_ops functions */
 163
 164 static void init_rx_pool(struct ibmvnic_adapter *adapter,
 165                          struct ibmvnic_rx_pool *rx_pool, int num, int index,
 166                          int buff_size, int active)
 167 {
 168         netdev_dbg(adapter->netdev,
 169                    "Initializing rx_pool %d, %d buffs, %d bytes each\n",
 170                    index, num, buff_size);
 171         rx_pool->size = num;
 172         rx_pool->index = index;
 173         rx_pool->buff_size = buff_size;
 174         rx_pool->active = active;
 175 }
 176
 177 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 178                                 struct ibmvnic_long_term_buff *ltb, int size)
 179 {
 180         struct device *dev = &adapter->vdev->dev;
 181
 182         ltb->size = size;
 183         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 184                                        GFP_KERNEL);
 185
 186         if (!ltb->buff) {
 187                 dev_err(dev, "Couldn't alloc long term buffer\n");
 188                 return -ENOMEM;
 189         }
 190         ltb->map_id = adapter->map_id;
 191         adapter->map_id++;
 192
 193         init_completion(&adapter->fw_done);
 194         send_request_map(adapter, ltb->addr,
 195                          ltb->size, ltb->map_id);
 196         wait_for_completion(&adapter->fw_done);
 197         return 0;
 198 }
 199
 200 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 201                                 struct ibmvnic_long_term_buff *ltb)
 202 {
 203         struct device *dev = &adapter->vdev->dev;
 204
 205         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 206         if (!adapter->failover)
 207                 send_request_unmap(adapter, ltb->map_id);
 208 }
 209
 210 static int alloc_rx_pool(struct ibmvnic_adapter *adapter,
 211                          struct ibmvnic_rx_pool *pool)
 212 {
 213         struct device *dev = &adapter->vdev->dev;
 214         int i;
 215
 216         pool->free_map = kcalloc(pool->size, sizeof(int), GFP_KERNEL);
 217         if (!pool->free_map)
 218                 return -ENOMEM;
 219
 220         pool->rx_buff = kcalloc(pool->size, sizeof(struct ibmvnic_rx_buff),
 221                                 GFP_KERNEL);
 222
 223         if (!pool->rx_buff) {
 224                 dev_err(dev, "Couldn't alloc rx buffers\n");
 225                 kfree(pool->free_map);
 226                 return -ENOMEM;
 227         }
 228
 229         if (alloc_long_term_buff(adapter, &pool->long_term_buff,
 230                                  pool->size * pool->buff_size)) {
 231                 kfree(pool->free_map);
 232                 kfree(pool->rx_buff);
 233                 return -ENOMEM;
 234         }
 235
 236         for (i = 0; i < pool->size; ++i)
 237                 pool->free_map[i] = i;
 238
 239         atomic_set(&pool->available, 0);
 240         pool->next_alloc = 0;
 241         pool->next_free = 0;
 242
 243         return 0;
 244 }
 245
 246 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 247                               struct ibmvnic_rx_pool *pool)
 248 {
 249         int count = pool->size - atomic_read(&pool->available);
 250         struct device *dev = &adapter->vdev->dev;
 251         int buffers_added = 0;
 252         unsigned long lpar_rc;
 253         union sub_crq sub_crq;
 254         struct sk_buff *skb;
 255         unsigned int offset;
 256         dma_addr_t dma_addr;
 257         unsigned char *dst;
 258         u64 *handle_array;
 259         int shift = 0;
 260         int index;
 261         int i;
 262
 263         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 264                                       be32_to_cpu(adapter->login_rsp_buf->
 265                                       off_rxadd_subcrqs));
 266
 267         for (i = 0; i < count; ++i) {
 268                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 269                 if (!skb) {
 270                         dev_err(dev, "Couldn't replenish rx buff\n");
 271                         adapter->replenish_no_mem++;
 272                         break;
 273                 }
 274
 275                 index = pool->free_map[pool->next_free];
 276
 277                 if (pool->rx_buff[index].skb)
 278                         dev_err(dev, "Inconsistent free_map!\n");
 279
 280                 /* Copy the skb to the long term mapped DMA buffer */
 281                 offset = index * pool->buff_size;
 282                 dst = pool->long_term_buff.buff + offset;
 283                 memset(dst, 0, pool->buff_size);
 284                 dma_addr = pool->long_term_buff.addr + offset;
 285                 pool->rx_buff[index].data = dst;
 286
 287                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 288                 pool->rx_buff[index].dma = dma_addr;
 289                 pool->rx_buff[index].skb = skb;
 290                 pool->rx_buff[index].pool_index = pool->index;
 291                 pool->rx_buff[index].size = pool->buff_size;
 292
 293                 memset(&sub_crq, 0, sizeof(sub_crq));
 294                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 295                 sub_crq.rx_add.correlator =
 296                     cpu_to_be64((u64)&pool->rx_buff[index]);
 297                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 298                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 299
 300                 /* The length field of the sCRQ is defined to be 24 bits so the
 301                  * buffer size needs to be left shifted by a byte before it is
 302                  * converted to big endian to prevent the last byte from being
 303                  * truncated.
 304                  */
 305 #ifdef __LITTLE_ENDIAN__
 306                 shift = 8;
 307 #endif
 308                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 309
 310                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 311                                       &sub_crq);
 312                 if (lpar_rc != H_SUCCESS)
 313                         goto failure;
 314
 315                 buffers_added++;
 316                 adapter->replenish_add_buff_success++;
 317                 pool->next_free = (pool->next_free + 1) % pool->size;
 318         }
 319         atomic_add(buffers_added, &pool->available);
 320         return;
 321
 322 failure:
 323         dev_info(dev, "replenish pools failure\n");
 324         pool->free_map[pool->next_free] = index;
 325         pool->rx_buff[index].skb = NULL;
 326         if (!dma_mapping_error(dev, dma_addr))
 327                 dma_unmap_single(dev, dma_addr, pool->buff_size,
 328                                  DMA_FROM_DEVICE);
 329
 330         dev_kfree_skb_any(skb);
 331         adapter->replenish_add_buff_failure++;
 332         atomic_add(buffers_added, &pool->available);
 333 }
 334
 335 static void replenish_pools(struct ibmvnic_adapter *adapter)
 336 {
 337         int i;
 338
 339         if (adapter->migrated)
 340                 return;
 341
 342         adapter->replenish_task_cycles++;
 343         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 344              i++) {
 345                 if (adapter->rx_pool[i].active)
 346                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 347         }
 348 }
 349
 350 static void free_rx_pool(struct ibmvnic_adapter *adapter,
 351                          struct ibmvnic_rx_pool *pool)
 352 {
 353         int i;
 354
 355         kfree(pool->free_map);
 356         pool->free_map = NULL;
 357
 358         if (!pool->rx_buff)
 359                 return;
 360
 361         for (i = 0; i < pool->size; i++) {
 362                 if (pool->rx_buff[i].skb) {
 363                         dev_kfree_skb_any(pool->rx_buff[i].skb);
 364                         pool->rx_buff[i].skb = NULL;
 365                 }
 366         }
 367         kfree(pool->rx_buff);
 368         pool->rx_buff = NULL;
 369 }
 370
 371 static int ibmvnic_open(struct net_device *netdev)
 372 {
 373         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 374         struct device *dev = &adapter->vdev->dev;
 375         struct ibmvnic_tx_pool *tx_pool;
 376         union ibmvnic_crq crq;
 377         int rxadd_subcrqs;
 378         u64 *size_array;
 379         int tx_subcrqs;
 380         int i, j;
 381
 382         rxadd_subcrqs =
 383             be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 384         tx_subcrqs =
 385             be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 386         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 387                                   be32_to_cpu(adapter->login_rsp_buf->
 388                                               off_rxadd_buff_size));
 389         adapter->map_id = 1;
 390         adapter->napi = kcalloc(adapter->req_rx_queues,
 391                                 sizeof(struct napi_struct), GFP_KERNEL);
 392         if (!adapter->napi)
 393                 goto alloc_napi_failed;
 394         for (i = 0; i < adapter->req_rx_queues; i++) {
 395                 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
 396                                NAPI_POLL_WEIGHT);
 397                 napi_enable(&adapter->napi[i]);
 398         }
 399         adapter->rx_pool =
 400             kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL);
 401
 402         if (!adapter->rx_pool)
 403                 goto rx_pool_arr_alloc_failed;
 404         send_map_query(adapter);
 405         for (i = 0; i < rxadd_subcrqs; i++) {
 406                 init_rx_pool(adapter, &adapter->rx_pool[i],
 407                              adapter->req_rx_add_entries_per_subcrq, i,
 408                              be64_to_cpu(size_array[i]), 1);
 409                 if (alloc_rx_pool(adapter, &adapter->rx_pool[i])) {
 410                         dev_err(dev, "Couldn't alloc rx pool\n");
 411                         goto rx_pool_alloc_failed;
 412                 }
 413         }
 414         adapter->tx_pool =
 415             kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 416
 417         if (!adapter->tx_pool)
 418                 goto tx_pool_arr_alloc_failed;
 419         for (i = 0; i < tx_subcrqs; i++) {
 420                 tx_pool = &adapter->tx_pool[i];
 421                 tx_pool->tx_buff =
 422                     kcalloc(adapter->req_tx_entries_per_subcrq,
 423                             sizeof(struct ibmvnic_tx_buff), GFP_KERNEL);
 424                 if (!tx_pool->tx_buff)
 425                         goto tx_pool_alloc_failed;
 426
 427                 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 428                                          adapter->req_tx_entries_per_subcrq *
 429                                          adapter->req_mtu))
 430                         goto tx_ltb_alloc_failed;
 431
 432                 tx_pool->free_map =
 433                     kcalloc(adapter->req_tx_entries_per_subcrq,
 434                             sizeof(int), GFP_KERNEL);
 435                 if (!tx_pool->free_map)
 436                         goto tx_fm_alloc_failed;
 437
 438                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 439                         tx_pool->free_map[j] = j;
 440
 441                 tx_pool->consumer_index = 0;
 442                 tx_pool->producer_index = 0;
 443         }
 444         adapter->bounce_buffer_size =
 445             (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1;
 446         adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size,
 447                                          GFP_KERNEL);
 448         if (!adapter->bounce_buffer)
 449                 goto bounce_alloc_failed;
 450
 451         adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer,
 452                                                     adapter->bounce_buffer_size,
 453                                                     DMA_TO_DEVICE);
 454         if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
 455                 dev_err(dev, "Couldn't map tx bounce buffer\n");
 456                 goto bounce_map_failed;
 457         }
 458         replenish_pools(adapter);
 459
 460         /* We're ready to receive frames, enable the sub-crq interrupts and
 461          * set the logical link state to up
 462          */
 463         for (i = 0; i < adapter->req_rx_queues; i++)
 464                 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
 465
 466         for (i = 0; i < adapter->req_tx_queues; i++)
 467                 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
 468
 469         memset(&crq, 0, sizeof(crq));
 470         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 471         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 472         crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP;
 473         ibmvnic_send_crq(adapter, &crq);
 474
 475         netif_tx_start_all_queues(netdev);
 476
 477         return 0;
 478
 479 bounce_map_failed:
 480         kfree(adapter->bounce_buffer);
 481 bounce_alloc_failed:
 482         i = tx_subcrqs - 1;
 483         kfree(adapter->tx_pool[i].free_map);
 484 tx_fm_alloc_failed:
 485         free_long_term_buff(adapter, &adapter->tx_pool[i].long_term_buff);
 486 tx_ltb_alloc_failed:
 487         kfree(adapter->tx_pool[i].tx_buff);
 488 tx_pool_alloc_failed:
 489         for (j = 0; j < i; j++) {
 490                 kfree(adapter->tx_pool[j].tx_buff);
 491                 free_long_term_buff(adapter,
 492                                     &adapter->tx_pool[j].long_term_buff);
 493                 kfree(adapter->tx_pool[j].free_map);
 494         }
 495         kfree(adapter->tx_pool);
 496         adapter->tx_pool = NULL;
 497 tx_pool_arr_alloc_failed:
 498         i = rxadd_subcrqs;
 499 rx_pool_alloc_failed:
 500         for (j = 0; j < i; j++) {
 501                 free_rx_pool(adapter, &adapter->rx_pool[j]);
 502                 free_long_term_buff(adapter,
 503                                     &adapter->rx_pool[j].long_term_buff);
 504         }
 505         kfree(adapter->rx_pool);
 506         adapter->rx_pool = NULL;
 507 rx_pool_arr_alloc_failed:
 508         for (i = 0; i < adapter->req_rx_queues; i++)
 509                 napi_disable(&adapter->napi[i]);
 510 alloc_napi_failed:
 511         return -ENOMEM;
 512 }
 513
 514 static void disable_sub_crqs(struct ibmvnic_adapter *adapter)
 515 {
 516         int i;
 517
 518         if (adapter->tx_scrq) {
 519                 for (i = 0; i < adapter->req_tx_queues; i++)
 520                         if (adapter->tx_scrq[i])
 521                                 disable_irq(adapter->tx_scrq[i]->irq);
 522         }
 523
 524         if (adapter->rx_scrq) {
 525                 for (i = 0; i < adapter->req_rx_queues; i++)
 526                         if (adapter->rx_scrq[i])
 527                                 disable_irq(adapter->rx_scrq[i]->irq);
 528         }
 529 }
 530
 531 static int ibmvnic_close(struct net_device *netdev)
 532 {
 533         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 534         struct device *dev = &adapter->vdev->dev;
 535         union ibmvnic_crq crq;
 536         int i;
 537
 538         adapter->closing = true;
 539         disable_sub_crqs(adapter);
 540
 541         for (i = 0; i < adapter->req_rx_queues; i++)
 542                 napi_disable(&adapter->napi[i]);
 543
 544         if (!adapter->failover)
 545                 netif_tx_stop_all_queues(netdev);
 546
 547         if (adapter->bounce_buffer) {
 548                 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
 549                         dma_unmap_single(&adapter->vdev->dev,
 550                                          adapter->bounce_buffer_dma,
 551                                          adapter->bounce_buffer_size,
 552                                          DMA_BIDIRECTIONAL);
 553                         adapter->bounce_buffer_dma = DMA_ERROR_CODE;
 554                 }
 555                 kfree(adapter->bounce_buffer);
 556                 adapter->bounce_buffer = NULL;
 557         }
 558
 559         memset(&crq, 0, sizeof(crq));
 560         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 561         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 562         crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN;
 563         ibmvnic_send_crq(adapter, &crq);
 564
 565         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 566              i++) {
 567                 kfree(adapter->tx_pool[i].tx_buff);
 568                 free_long_term_buff(adapter,
 569                                     &adapter->tx_pool[i].long_term_buff);
 570                 kfree(adapter->tx_pool[i].free_map);
 571         }
 572         kfree(adapter->tx_pool);
 573         adapter->tx_pool = NULL;
 574
 575         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 576              i++) {
 577                 free_rx_pool(adapter, &adapter->rx_pool[i]);
 578                 free_long_term_buff(adapter,
 579                                     &adapter->rx_pool[i].long_term_buff);
 580         }
 581         kfree(adapter->rx_pool);
 582         adapter->rx_pool = NULL;
 583
 584         adapter->closing = false;
 585
 586         return 0;
 587 }
 588
 589 /**
 590  * build_hdr_data - creates L2/L3/L4 header data buffer
 591  * @hdr_field - bitfield determining needed headers
 592  * @skb - socket buffer
 593  * @hdr_len - array of header lengths
 594  * @tot_len - total length of data
 595  *
 596  * Reads hdr_field to determine which headers are needed by firmware.
 597  * Builds a buffer containing these headers.  Saves individual header
 598  * lengths and total buffer length to be used to build descriptors.
 599  */
 600 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
 601                           int *hdr_len, u8 *hdr_data)
 602 {
 603         int len = 0;
 604         u8 *hdr;
 605
 606         hdr_len[0] = sizeof(struct ethhdr);
 607
 608         if (skb->protocol == htons(ETH_P_IP)) {
 609                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
 610                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 611                         hdr_len[2] = tcp_hdrlen(skb);
 612                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
 613                         hdr_len[2] = sizeof(struct udphdr);
 614         } else if (skb->protocol == htons(ETH_P_IPV6)) {
 615                 hdr_len[1] = sizeof(struct ipv6hdr);
 616                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
 617                         hdr_len[2] = tcp_hdrlen(skb);
 618                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
 619                         hdr_len[2] = sizeof(struct udphdr);
 620         }
 621
 622         memset(hdr_data, 0, 120);
 623         if ((hdr_field >> 6) & 1) {
 624                 hdr = skb_mac_header(skb);
 625                 memcpy(hdr_data, hdr, hdr_len[0]);
 626                 len += hdr_len[0];
 627         }
 628
 629         if ((hdr_field >> 5) & 1) {
 630                 hdr = skb_network_header(skb);
 631                 memcpy(hdr_data + len, hdr, hdr_len[1]);
 632                 len += hdr_len[1];
 633         }
 634
 635         if ((hdr_field >> 4) & 1) {
 636                 hdr = skb_transport_header(skb);
 637                 memcpy(hdr_data + len, hdr, hdr_len[2]);
 638                 len += hdr_len[2];
 639         }
 640         return len;
 641 }
 642
 643 /**
 644  * create_hdr_descs - create header and header extension descriptors
 645  * @hdr_field - bitfield determining needed headers
 646  * @data - buffer containing header data
 647  * @len - length of data buffer
 648  * @hdr_len - array of individual header lengths
 649  * @scrq_arr - descriptor array
 650  *
 651  * Creates header and, if needed, header extension descriptors and
 652  * places them in a descriptor array, scrq_arr
 653  */
 654
 655 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
 656                              union sub_crq *scrq_arr)
 657 {
 658         union sub_crq hdr_desc;
 659         int tmp_len = len;
 660         u8 *data, *cur;
 661         int tmp;
 662
 663         while (tmp_len > 0) {
 664                 cur = hdr_data + len - tmp_len;
 665
 666                 memset(&hdr_desc, 0, sizeof(hdr_desc));
 667                 if (cur != hdr_data) {
 668                         data = hdr_desc.hdr_ext.data;
 669                         tmp = tmp_len > 29 ? 29 : tmp_len;
 670                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
 671                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
 672                         hdr_desc.hdr_ext.len = tmp;
 673                 } else {
 674                         data = hdr_desc.hdr.data;
 675                         tmp = tmp_len > 24 ? 24 : tmp_len;
 676                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
 677                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
 678                         hdr_desc.hdr.len = tmp;
 679                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
 680                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
 681                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
 682                         hdr_desc.hdr.flag = hdr_field << 1;
 683                 }
 684                 memcpy(data, cur, tmp);
 685                 tmp_len -= tmp;
 686                 *scrq_arr = hdr_desc;
 687                 scrq_arr++;
 688         }
 689 }
 690
 691 /**
 692  * build_hdr_descs_arr - build a header descriptor array
 693  * @skb - socket buffer
 694  * @num_entries - number of descriptors to be sent
 695  * @subcrq - first TX descriptor
 696  * @hdr_field - bit field determining which headers will be sent
 697  *
 698  * This function will build a TX descriptor array with applicable
 699  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
 700  */
 701
 702 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
 703                                 int *num_entries, u8 hdr_field)
 704 {
 705         int hdr_len[3] = {0, 0, 0};
 706         int tot_len, len;
 707         u8 *hdr_data = txbuff->hdr_data;
 708
 709         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
 710                                  txbuff->hdr_data);
 711         len = tot_len;
 712         len -= 24;
 713         if (len > 0)
 714                 num_entries += len % 29 ? len / 29 + 1 : len / 29;
 715         create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
 716                          txbuff->indir_arr + 1);
 717 }
 718
 719 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 720 {
 721         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 722         int queue_num = skb_get_queue_mapping(skb);
 723         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
 724         struct device *dev = &adapter->vdev->dev;
 725         struct ibmvnic_tx_buff *tx_buff = NULL;
 726         struct ibmvnic_sub_crq_queue *tx_scrq;
 727         struct ibmvnic_tx_pool *tx_pool;
 728         unsigned int tx_send_failed = 0;
 729         unsigned int tx_map_failed = 0;
 730         unsigned int tx_dropped = 0;
 731         unsigned int tx_packets = 0;
 732         unsigned int tx_bytes = 0;
 733         dma_addr_t data_dma_addr;
 734         struct netdev_queue *txq;
 735         bool used_bounce = false;
 736         unsigned long lpar_rc;
 737         union sub_crq tx_crq;
 738         unsigned int offset;
 739         int num_entries = 1;
 740         unsigned char *dst;
 741         u64 *handle_array;
 742         int index = 0;
 743         int ret = 0;
 744
 745         tx_pool = &adapter->tx_pool[queue_num];
 746         tx_scrq = adapter->tx_scrq[queue_num];
 747         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
 748         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 749                                    be32_to_cpu(adapter->login_rsp_buf->
 750                                                off_txsubm_subcrqs));
 751         if (adapter->migrated) {
 752                 tx_send_failed++;
 753                 tx_dropped++;
 754                 ret = NETDEV_TX_BUSY;
 755                 goto out;
 756         }
 757
 758         index = tx_pool->free_map[tx_pool->consumer_index];
 759         offset = index * adapter->req_mtu;
 760         dst = tx_pool->long_term_buff.buff + offset;
 761         memset(dst, 0, adapter->req_mtu);
 762         skb_copy_from_linear_data(skb, dst, skb->len);
 763         data_dma_addr = tx_pool->long_term_buff.addr + offset;
 764
 765         tx_pool->consumer_index =
 766             (tx_pool->consumer_index + 1) %
 767                 adapter->req_tx_entries_per_subcrq;
 768
 769         tx_buff = &tx_pool->tx_buff[index];
 770         tx_buff->skb = skb;
 771         tx_buff->data_dma[0] = data_dma_addr;
 772         tx_buff->data_len[0] = skb->len;
 773         tx_buff->index = index;
 774         tx_buff->pool_index = queue_num;
 775         tx_buff->last_frag = true;
 776         tx_buff->used_bounce = used_bounce;
 777
 778         memset(&tx_crq, 0, sizeof(tx_crq));
 779         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
 780         tx_crq.v1.type = IBMVNIC_TX_DESC;
 781         tx_crq.v1.n_crq_elem = 1;
 782         tx_crq.v1.n_sge = 1;
 783         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
 784         tx_crq.v1.correlator = cpu_to_be32(index);
 785         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
 786         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
 787         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
 788
 789         if (adapter->vlan_header_insertion) {
 790                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
 791                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
 792         }
 793
 794         if (skb->protocol == htons(ETH_P_IP)) {
 795                 if (ip_hdr(skb)->version == 4)
 796                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
 797                 else if (ip_hdr(skb)->version == 6)
 798                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
 799
 800                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 801                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
 802                 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
 803                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
 804         }
 805
 806         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 807                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
 808                 hdrs += 2;
 809         }
 810         /* determine if l2/3/4 headers are sent to firmware */
 811         if ((*hdrs >> 7) & 1 &&
 812             (skb->protocol == htons(ETH_P_IP) ||
 813              skb->protocol == htons(ETH_P_IPV6))) {
 814                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
 815                 tx_crq.v1.n_crq_elem = num_entries;
 816                 tx_buff->indir_arr[0] = tx_crq;
 817                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
 818                                                     sizeof(tx_buff->indir_arr),
 819                                                     DMA_TO_DEVICE);
 820                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
 821                         if (!firmware_has_feature(FW_FEATURE_CMO))
 822                                 dev_err(dev, "tx: unable to map descriptor array\n");
 823                         tx_map_failed++;
 824                         tx_dropped++;
 825                         ret = NETDEV_TX_BUSY;
 826                         goto out;
 827                 }
 828                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
 829                                                (u64)tx_buff->indir_dma,
 830                                                (u64)num_entries);
 831         } else {
 832                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
 833                                       &tx_crq);
 834         }
 835         if (lpar_rc != H_SUCCESS) {
 836                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
 837
 838                 if (tx_pool->consumer_index == 0)
 839                         tx_pool->consumer_index =
 840                                 adapter->req_tx_entries_per_subcrq - 1;
 841                 else
 842                         tx_pool->consumer_index--;
 843
 844                 tx_send_failed++;
 845                 tx_dropped++;
 846                 ret = NETDEV_TX_BUSY;
 847                 goto out;
 848         }
 849
 850         atomic_inc(&tx_scrq->used);
 851
 852         if (atomic_read(&tx_scrq->used) >= adapter->req_tx_entries_per_subcrq) {
 853                 netdev_info(netdev, "Stopping queue %d\n", queue_num);
 854                 netif_stop_subqueue(netdev, queue_num);
 855         }
 856
 857         tx_packets++;
 858         tx_bytes += skb->len;
 859         txq->trans_start = jiffies;
 860         ret = NETDEV_TX_OK;
 861
 862 out:
 863         netdev->stats.tx_dropped += tx_dropped;
 864         netdev->stats.tx_bytes += tx_bytes;
 865         netdev->stats.tx_packets += tx_packets;
 866         adapter->tx_send_failed += tx_send_failed;
 867         adapter->tx_map_failed += tx_map_failed;
 868
 869         return ret;
 870 }
 871
 872 static void ibmvnic_set_multi(struct net_device *netdev)
 873 {
 874         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 875         struct netdev_hw_addr *ha;
 876         union ibmvnic_crq crq;
 877
 878         memset(&crq, 0, sizeof(crq));
 879         crq.request_capability.first = IBMVNIC_CRQ_CMD;
 880         crq.request_capability.cmd = REQUEST_CAPABILITY;
 881
 882         if (netdev->flags & IFF_PROMISC) {
 883                 if (!adapter->promisc_supported)
 884                         return;
 885         } else {
 886                 if (netdev->flags & IFF_ALLMULTI) {
 887                         /* Accept all multicast */
 888                         memset(&crq, 0, sizeof(crq));
 889                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 890                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 891                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
 892                         ibmvnic_send_crq(adapter, &crq);
 893                 } else if (netdev_mc_empty(netdev)) {
 894                         /* Reject all multicast */
 895                         memset(&crq, 0, sizeof(crq));
 896                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 897                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 898                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
 899                         ibmvnic_send_crq(adapter, &crq);
 900                 } else {
 901                         /* Accept one or more multicast(s) */
 902                         netdev_for_each_mc_addr(ha, netdev) {
 903                                 memset(&crq, 0, sizeof(crq));
 904                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 905                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 906                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
 907                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
 908                                                 ha->addr);
 909                                 ibmvnic_send_crq(adapter, &crq);
 910                         }
 911                 }
 912         }
 913 }
 914
 915 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
 916 {
 917         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 918         struct sockaddr *addr = p;
 919         union ibmvnic_crq crq;
 920
 921         if (!is_valid_ether_addr(addr->sa_data))
 922                 return -EADDRNOTAVAIL;
 923
 924         memset(&crq, 0, sizeof(crq));
 925         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
 926         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
 927         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
 928         ibmvnic_send_crq(adapter, &crq);
 929         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
 930         return 0;
 931 }
 932
 933 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
 934 {
 935         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 936
 937         if (new_mtu > adapter->req_mtu || new_mtu < adapter->min_mtu)
 938                 return -EINVAL;
 939
 940         netdev->mtu = new_mtu;
 941         return 0;
 942 }
 943
 944 static void ibmvnic_tx_timeout(struct net_device *dev)
 945 {
 946         struct ibmvnic_adapter *adapter = netdev_priv(dev);
 947         int rc;
 948
 949         /* Adapter timed out, resetting it */
 950         release_sub_crqs(adapter);
 951         rc = ibmvnic_reset_crq(adapter);
 952         if (rc)
 953                 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
 954         else
 955                 ibmvnic_send_crq_init(adapter);
 956 }
 957
 958 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
 959                                   struct ibmvnic_rx_buff *rx_buff)
 960 {
 961         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
 962
 963         rx_buff->skb = NULL;
 964
 965         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
 966         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
 967
 968         atomic_dec(&pool->available);
 969 }
 970
 971 static int ibmvnic_poll(struct napi_struct *napi, int budget)
 972 {
 973         struct net_device *netdev = napi->dev;
 974         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 975         int scrq_num = (int)(napi - adapter->napi);
 976         int frames_processed = 0;
 977 restart_poll:
 978         while (frames_processed < budget) {
 979                 struct sk_buff *skb;
 980                 struct ibmvnic_rx_buff *rx_buff;
 981                 union sub_crq *next;
 982                 u32 length;
 983                 u16 offset;
 984                 u8 flags = 0;
 985
 986                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
 987                         break;
 988                 /* The queue entry at the current index is peeked at above
 989                  * to determine that there is a valid descriptor awaiting
 990                  * processing. We want to be sure that the current slot
 991                  * holds a valid descriptor before reading its contents.
 992                  */
 993                 dma_rmb();
 994                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
 995                 rx_buff =
 996                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
 997                                                           rx_comp.correlator);
 998                 /* do error checking */
 999                 if (next->rx_comp.rc) {
1000                         netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1001                         /* free the entry */
1002                         next->rx_comp.first = 0;
1003                         dev_kfree_skb_any(rx_buff->skb);
1004                         remove_buff_from_pool(adapter, rx_buff);
1005                         break;
1006                 }
1007
1008                 length = be32_to_cpu(next->rx_comp.len);
1009                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1010                 flags = next->rx_comp.flags;
1011                 skb = rx_buff->skb;
1012                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1013                                         length);
1014                 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
1015                 /* free the entry */
1016                 next->rx_comp.first = 0;
1017                 remove_buff_from_pool(adapter, rx_buff);
1018
1019                 skb_put(skb, length);
1020                 skb->protocol = eth_type_trans(skb, netdev);
1021
1022                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1023                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1024                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1025                 }
1026
1027                 length = skb->len;
1028                 napi_gro_receive(napi, skb); /* send it up */
1029                 netdev->stats.rx_packets++;
1030                 netdev->stats.rx_bytes += length;
1031                 frames_processed++;
1032         }
1033         replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1034
1035         if (frames_processed < budget) {
1036                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1037                 napi_complete(napi);
1038                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1039                     napi_reschedule(napi)) {
1040                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1041                         goto restart_poll;
1042                 }
1043         }
1044         return frames_processed;
1045 }
1046
1047 #ifdef CONFIG_NET_POLL_CONTROLLER
1048 static void ibmvnic_netpoll_controller(struct net_device *dev)
1049 {
1050         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1051         int i;
1052
1053         replenish_pools(netdev_priv(dev));
1054         for (i = 0; i < adapter->req_rx_queues; i++)
1055                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1056                                      adapter->rx_scrq[i]);
1057 }
1058 #endif
1059
1060 static const struct net_device_ops ibmvnic_netdev_ops = {
1061         .ndo_open               = ibmvnic_open,
1062         .ndo_stop               = ibmvnic_close,
1063         .ndo_start_xmit         = ibmvnic_xmit,
1064         .ndo_set_rx_mode        = ibmvnic_set_multi,
1065         .ndo_set_mac_address    = ibmvnic_set_mac,
1066         .ndo_validate_addr      = eth_validate_addr,
1067         .ndo_change_mtu         = ibmvnic_change_mtu,
1068         .ndo_tx_timeout         = ibmvnic_tx_timeout,
1069 #ifdef CONFIG_NET_POLL_CONTROLLER
1070         .ndo_poll_controller    = ibmvnic_netpoll_controller,
1071 #endif
1072 };
1073
1074 /* ethtool functions */
1075
1076 static int ibmvnic_get_settings(struct net_device *netdev,
1077                                 struct ethtool_cmd *cmd)
1078 {
1079         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1080                           SUPPORTED_FIBRE);
1081         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1082                             ADVERTISED_FIBRE);
1083         ethtool_cmd_speed_set(cmd, SPEED_1000);
1084         cmd->duplex = DUPLEX_FULL;
1085         cmd->port = PORT_FIBRE;
1086         cmd->phy_address = 0;
1087         cmd->transceiver = XCVR_INTERNAL;
1088         cmd->autoneg = AUTONEG_ENABLE;
1089         cmd->maxtxpkt = 0;
1090         cmd->maxrxpkt = 1;
1091         return 0;
1092 }
1093
1094 static void ibmvnic_get_drvinfo(struct net_device *dev,
1095                                 struct ethtool_drvinfo *info)
1096 {
1097         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1098         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1099 }
1100
1101 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1102 {
1103         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1104
1105         return adapter->msg_enable;
1106 }
1107
1108 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1109 {
1110         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1111
1112         adapter->msg_enable = data;
1113 }
1114
1115 static u32 ibmvnic_get_link(struct net_device *netdev)
1116 {
1117         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1118
1119         /* Don't need to send a query because we request a logical link up at
1120          * init and then we wait for link state indications
1121          */
1122         return adapter->logical_link_state;
1123 }
1124
1125 static void ibmvnic_get_ringparam(struct net_device *netdev,
1126                                   struct ethtool_ringparam *ring)
1127 {
1128         ring->rx_max_pending = 0;
1129         ring->tx_max_pending = 0;
1130         ring->rx_mini_max_pending = 0;
1131         ring->rx_jumbo_max_pending = 0;
1132         ring->rx_pending = 0;
1133         ring->tx_pending = 0;
1134         ring->rx_mini_pending = 0;
1135         ring->rx_jumbo_pending = 0;
1136 }
1137
1138 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1139 {
1140         int i;
1141
1142         if (stringset != ETH_SS_STATS)
1143                 return;
1144
1145         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1146                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1147 }
1148
1149 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1150 {
1151         switch (sset) {
1152         case ETH_SS_STATS:
1153                 return ARRAY_SIZE(ibmvnic_stats);
1154         default:
1155                 return -EOPNOTSUPP;
1156         }
1157 }
1158
1159 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1160                                       struct ethtool_stats *stats, u64 *data)
1161 {
1162         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1163         union ibmvnic_crq crq;
1164         int i;
1165
1166         memset(&crq, 0, sizeof(crq));
1167         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1168         crq.request_statistics.cmd = REQUEST_STATISTICS;
1169         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1170         crq.request_statistics.len =
1171             cpu_to_be32(sizeof(struct ibmvnic_statistics));
1172
1173         /* Wait for data to be written */
1174         init_completion(&adapter->stats_done);
1175         ibmvnic_send_crq(adapter, &crq);
1176         wait_for_completion(&adapter->stats_done);
1177
1178         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1179                 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1180 }
1181
1182 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1183         .get_settings           = ibmvnic_get_settings,
1184         .get_drvinfo            = ibmvnic_get_drvinfo,
1185         .get_msglevel           = ibmvnic_get_msglevel,
1186         .set_msglevel           = ibmvnic_set_msglevel,
1187         .get_link               = ibmvnic_get_link,
1188         .get_ringparam          = ibmvnic_get_ringparam,
1189         .get_strings            = ibmvnic_get_strings,
1190         .get_sset_count         = ibmvnic_get_sset_count,
1191         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
1192 };
1193
1194 /* Routines for managing CRQs/sCRQs  */
1195
1196 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1197                                   struct ibmvnic_sub_crq_queue *scrq)
1198 {
1199         struct device *dev = &adapter->vdev->dev;
1200         long rc;
1201
1202         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1203
1204         /* Close the sub-crqs */
1205         do {
1206                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1207                                         adapter->vdev->unit_address,
1208                                         scrq->crq_num);
1209         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1210
1211         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1212                          DMA_BIDIRECTIONAL);
1213         free_pages((unsigned long)scrq->msgs, 2);
1214         kfree(scrq);
1215 }
1216
1217 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1218                                                         *adapter)
1219 {
1220         struct device *dev = &adapter->vdev->dev;
1221         struct ibmvnic_sub_crq_queue *scrq;
1222         int rc;
1223
1224         scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1225         if (!scrq)
1226                 return NULL;
1227
1228         scrq->msgs = (union sub_crq *)__get_free_pages(GFP_ATOMIC, 2);
1229         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1230         if (!scrq->msgs) {
1231                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1232                 goto zero_page_failed;
1233         }
1234
1235         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1236                                          DMA_BIDIRECTIONAL);
1237         if (dma_mapping_error(dev, scrq->msg_token)) {
1238                 dev_warn(dev, "Couldn't map crq queue messages page\n");
1239                 goto map_failed;
1240         }
1241
1242         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1243                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1244
1245         if (rc == H_RESOURCE)
1246                 rc = ibmvnic_reset_crq(adapter);
1247
1248         if (rc == H_CLOSED) {
1249                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1250         } else if (rc) {
1251                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1252                 goto reg_failed;
1253         }
1254
1255         scrq->adapter = adapter;
1256         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1257         scrq->cur = 0;
1258         atomic_set(&scrq->used, 0);
1259         scrq->rx_skb_top = NULL;
1260         spin_lock_init(&scrq->lock);
1261
1262         netdev_dbg(adapter->netdev,
1263                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1264                    scrq->crq_num, scrq->hw_irq, scrq->irq);
1265
1266         return scrq;
1267
1268 reg_failed:
1269         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1270                          DMA_BIDIRECTIONAL);
1271 map_failed:
1272         free_pages((unsigned long)scrq->msgs, 2);
1273 zero_page_failed:
1274         kfree(scrq);
1275
1276         return NULL;
1277 }
1278
1279 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1280 {
1281         int i;
1282
1283         if (adapter->tx_scrq) {
1284                 for (i = 0; i < adapter->req_tx_queues; i++)
1285                         if (adapter->tx_scrq[i]) {
1286                                 free_irq(adapter->tx_scrq[i]->irq,
1287                                          adapter->tx_scrq[i]);
1288                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1289                                 release_sub_crq_queue(adapter,
1290                                                       adapter->tx_scrq[i]);
1291                         }
1292                 kfree(adapter->tx_scrq);
1293                 adapter->tx_scrq = NULL;
1294         }
1295
1296         if (adapter->rx_scrq) {
1297                 for (i = 0; i < adapter->req_rx_queues; i++)
1298                         if (adapter->rx_scrq[i]) {
1299                                 free_irq(adapter->rx_scrq[i]->irq,
1300                                          adapter->rx_scrq[i]);
1301                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1302                                 release_sub_crq_queue(adapter,
1303                                                       adapter->rx_scrq[i]);
1304                         }
1305                 kfree(adapter->rx_scrq);
1306                 adapter->rx_scrq = NULL;
1307         }
1308
1309         adapter->requested_caps = 0;
1310 }
1311
1312 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *adapter)
1313 {
1314         int i;
1315
1316         if (adapter->tx_scrq) {
1317                 for (i = 0; i < adapter->req_tx_queues; i++)
1318                         if (adapter->tx_scrq[i])
1319                                 release_sub_crq_queue(adapter,
1320                                                       adapter->tx_scrq[i]);
1321                 adapter->tx_scrq = NULL;
1322         }
1323
1324         if (adapter->rx_scrq) {
1325                 for (i = 0; i < adapter->req_rx_queues; i++)
1326                         if (adapter->rx_scrq[i])
1327                                 release_sub_crq_queue(adapter,
1328                                                       adapter->rx_scrq[i]);
1329                 adapter->rx_scrq = NULL;
1330         }
1331
1332         adapter->requested_caps = 0;
1333 }
1334
1335 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1336                             struct ibmvnic_sub_crq_queue *scrq)
1337 {
1338         struct device *dev = &adapter->vdev->dev;
1339         unsigned long rc;
1340
1341         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1342                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1343         if (rc)
1344                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1345                         scrq->hw_irq, rc);
1346         return rc;
1347 }
1348
1349 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1350                            struct ibmvnic_sub_crq_queue *scrq)
1351 {
1352         struct device *dev = &adapter->vdev->dev;
1353         unsigned long rc;
1354
1355         if (scrq->hw_irq > 0x100000000ULL) {
1356                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1357                 return 1;
1358         }
1359
1360         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1361                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1362         if (rc)
1363                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1364                         scrq->hw_irq, rc);
1365         return rc;
1366 }
1367
1368 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1369                                struct ibmvnic_sub_crq_queue *scrq)
1370 {
1371         struct device *dev = &adapter->vdev->dev;
1372         struct ibmvnic_tx_buff *txbuff;
1373         union sub_crq *next;
1374         int index;
1375         int i, j;
1376         u8 first;
1377
1378 restart_loop:
1379         while (pending_scrq(adapter, scrq)) {
1380                 unsigned int pool = scrq->pool_index;
1381
1382                 /* The queue entry at the current index is peeked at above
1383                  * to determine that there is a valid descriptor awaiting
1384                  * processing. We want to be sure that the current slot
1385                  * holds a valid descriptor before reading its contents.
1386                  */
1387                 dma_rmb();
1388
1389                 next = ibmvnic_next_scrq(adapter, scrq);
1390                 for (i = 0; i < next->tx_comp.num_comps; i++) {
1391                         if (next->tx_comp.rcs[i])
1392                                 dev_err(dev, "tx error %x\n",
1393                                         next->tx_comp.rcs[i]);
1394                         index = be32_to_cpu(next->tx_comp.correlators[i]);
1395                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
1396
1397                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1398                                 if (!txbuff->data_dma[j])
1399                                         continue;
1400
1401                                 txbuff->data_dma[j] = 0;
1402                                 txbuff->used_bounce = false;
1403                         }
1404                         /* if sub_crq was sent indirectly */
1405                         first = txbuff->indir_arr[0].generic.first;
1406                         if (first == IBMVNIC_CRQ_CMD) {
1407                                 dma_unmap_single(dev, txbuff->indir_dma,
1408                                                  sizeof(txbuff->indir_arr),
1409                                                  DMA_TO_DEVICE);
1410                         }
1411
1412                         if (txbuff->last_frag) {
1413                                 atomic_dec(&scrq->used);
1414
1415                                 if (atomic_read(&scrq->used) <=
1416                                     (adapter->req_tx_entries_per_subcrq / 2) &&
1417                                     netif_subqueue_stopped(adapter->netdev,
1418                                                            txbuff->skb)) {
1419                                         netif_wake_subqueue(adapter->netdev,
1420                                                             scrq->pool_index);
1421                                         netdev_dbg(adapter->netdev,
1422                                                    "Started queue %d\n",
1423                                                    scrq->pool_index);
1424                                 }
1425
1426                                 dev_kfree_skb_any(txbuff->skb);
1427                         }
1428
1429                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1430                                                      producer_index] = index;
1431                         adapter->tx_pool[pool].producer_index =
1432                             (adapter->tx_pool[pool].producer_index + 1) %
1433                             adapter->req_tx_entries_per_subcrq;
1434                 }
1435                 /* remove tx_comp scrq*/
1436                 next->tx_comp.first = 0;
1437         }
1438
1439         enable_scrq_irq(adapter, scrq);
1440
1441         if (pending_scrq(adapter, scrq)) {
1442                 disable_scrq_irq(adapter, scrq);
1443                 goto restart_loop;
1444         }
1445
1446         return 0;
1447 }
1448
1449 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1450 {
1451         struct ibmvnic_sub_crq_queue *scrq = instance;
1452         struct ibmvnic_adapter *adapter = scrq->adapter;
1453
1454         disable_scrq_irq(adapter, scrq);
1455         ibmvnic_complete_tx(adapter, scrq);
1456
1457         return IRQ_HANDLED;
1458 }
1459
1460 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1461 {
1462         struct ibmvnic_sub_crq_queue *scrq = instance;
1463         struct ibmvnic_adapter *adapter = scrq->adapter;
1464
1465         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1466                 disable_scrq_irq(adapter, scrq);
1467                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1468         }
1469
1470         return IRQ_HANDLED;
1471 }
1472
1473 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1474 {
1475         struct device *dev = &adapter->vdev->dev;
1476         struct ibmvnic_sub_crq_queue *scrq;
1477         int i = 0, j = 0;
1478         int rc = 0;
1479
1480         for (i = 0; i < adapter->req_tx_queues; i++) {
1481                 scrq = adapter->tx_scrq[i];
1482                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1483
1484                 if (!scrq->irq) {
1485                         rc = -EINVAL;
1486                         dev_err(dev, "Error mapping irq\n");
1487                         goto req_tx_irq_failed;
1488                 }
1489
1490                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1491                                  0, "ibmvnic_tx", scrq);
1492
1493                 if (rc) {
1494                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1495                                 scrq->irq, rc);
1496                         irq_dispose_mapping(scrq->irq);
1497                         goto req_rx_irq_failed;
1498                 }
1499         }
1500
1501         for (i = 0; i < adapter->req_rx_queues; i++) {
1502                 scrq = adapter->rx_scrq[i];
1503                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1504                 if (!scrq->irq) {
1505                         rc = -EINVAL;
1506                         dev_err(dev, "Error mapping irq\n");
1507                         goto req_rx_irq_failed;
1508                 }
1509                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1510                                  0, "ibmvnic_rx", scrq);
1511                 if (rc) {
1512                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1513                                 scrq->irq, rc);
1514                         irq_dispose_mapping(scrq->irq);
1515                         goto req_rx_irq_failed;
1516                 }
1517         }
1518         return rc;
1519
1520 req_rx_irq_failed:
1521         for (j = 0; j < i; j++) {
1522                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1523                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1524         }
1525         i = adapter->req_tx_queues;
1526 req_tx_irq_failed:
1527         for (j = 0; j < i; j++) {
1528                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1529                 irq_dispose_mapping(adapter->tx_scrq[j]->irq);
1530         }
1531         release_sub_crqs_no_irqs(adapter);
1532         return rc;
1533 }
1534
1535 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1536 {
1537         struct device *dev = &adapter->vdev->dev;
1538         struct ibmvnic_sub_crq_queue **allqueues;
1539         int registered_queues = 0;
1540         union ibmvnic_crq crq;
1541         int total_queues;
1542         int more = 0;
1543         int i;
1544
1545         if (!retry) {
1546                 /* Sub-CRQ entries are 32 byte long */
1547                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1548
1549                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1550                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
1551                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1552                         goto allqueues_failed;
1553                 }
1554
1555                 /* Get the minimum between the queried max and the entries
1556                  * that fit in our PAGE_SIZE
1557                  */
1558                 adapter->req_tx_entries_per_subcrq =
1559                     adapter->max_tx_entries_per_subcrq > entries_page ?
1560                     entries_page : adapter->max_tx_entries_per_subcrq;
1561                 adapter->req_rx_add_entries_per_subcrq =
1562                     adapter->max_rx_add_entries_per_subcrq > entries_page ?
1563                     entries_page : adapter->max_rx_add_entries_per_subcrq;
1564
1565                 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
1566                 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
1567                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
1568
1569                 adapter->req_mtu = adapter->max_mtu;
1570         }
1571
1572         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1573
1574         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1575         if (!allqueues)
1576                 goto allqueues_failed;
1577
1578         for (i = 0; i < total_queues; i++) {
1579                 allqueues[i] = init_sub_crq_queue(adapter);
1580                 if (!allqueues[i]) {
1581                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1582                         break;
1583                 }
1584                 registered_queues++;
1585         }
1586
1587         /* Make sure we were able to register the minimum number of queues */
1588         if (registered_queues <
1589             adapter->min_tx_queues + adapter->min_rx_queues) {
1590                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
1591                 goto tx_failed;
1592         }
1593
1594         /* Distribute the failed allocated queues*/
1595         for (i = 0; i < total_queues - registered_queues + more ; i++) {
1596                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1597                 switch (i % 3) {
1598                 case 0:
1599                         if (adapter->req_rx_queues > adapter->min_rx_queues)
1600                                 adapter->req_rx_queues--;
1601                         else
1602                                 more++;
1603                         break;
1604                 case 1:
1605                         if (adapter->req_tx_queues > adapter->min_tx_queues)
1606                                 adapter->req_tx_queues--;
1607                         else
1608                                 more++;
1609                         break;
1610                 }
1611         }
1612
1613         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1614                                    sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1615         if (!adapter->tx_scrq)
1616                 goto tx_failed;
1617
1618         for (i = 0; i < adapter->req_tx_queues; i++) {
1619                 adapter->tx_scrq[i] = allqueues[i];
1620                 adapter->tx_scrq[i]->pool_index = i;
1621         }
1622
1623         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1624                                    sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1625         if (!adapter->rx_scrq)
1626                 goto rx_failed;
1627
1628         for (i = 0; i < adapter->req_rx_queues; i++) {
1629                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1630                 adapter->rx_scrq[i]->scrq_num = i;
1631         }
1632
1633         memset(&crq, 0, sizeof(crq));
1634         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1635         crq.request_capability.cmd = REQUEST_CAPABILITY;
1636
1637         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
1638         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
1639         ibmvnic_send_crq(adapter, &crq);
1640
1641         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
1642         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
1643         ibmvnic_send_crq(adapter, &crq);
1644
1645         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
1646         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
1647         ibmvnic_send_crq(adapter, &crq);
1648
1649         crq.request_capability.capability =
1650             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1651         crq.request_capability.number =
1652             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
1653         ibmvnic_send_crq(adapter, &crq);
1654
1655         crq.request_capability.capability =
1656             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1657         crq.request_capability.number =
1658             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
1659         ibmvnic_send_crq(adapter, &crq);
1660
1661         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
1662         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
1663         ibmvnic_send_crq(adapter, &crq);
1664
1665         if (adapter->netdev->flags & IFF_PROMISC) {
1666                 if (adapter->promisc_supported) {
1667                         crq.request_capability.capability =
1668                             cpu_to_be16(PROMISC_REQUESTED);
1669                         crq.request_capability.number = cpu_to_be64(1);
1670                         ibmvnic_send_crq(adapter, &crq);
1671                 }
1672         } else {
1673                 crq.request_capability.capability =
1674                     cpu_to_be16(PROMISC_REQUESTED);
1675                 crq.request_capability.number = cpu_to_be64(0);
1676                 ibmvnic_send_crq(adapter, &crq);
1677         }
1678
1679         kfree(allqueues);
1680
1681         return;
1682
1683 rx_failed:
1684         kfree(adapter->tx_scrq);
1685         adapter->tx_scrq = NULL;
1686 tx_failed:
1687         for (i = 0; i < registered_queues; i++)
1688                 release_sub_crq_queue(adapter, allqueues[i]);
1689         kfree(allqueues);
1690 allqueues_failed:
1691         ibmvnic_remove(adapter->vdev);
1692 }
1693
1694 static int pending_scrq(struct ibmvnic_adapter *adapter,
1695                         struct ibmvnic_sub_crq_queue *scrq)
1696 {
1697         union sub_crq *entry = &scrq->msgs[scrq->cur];
1698
1699         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1700                 return 1;
1701         else
1702                 return 0;
1703 }
1704
1705 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1706                                         struct ibmvnic_sub_crq_queue *scrq)
1707 {
1708         union sub_crq *entry;
1709         unsigned long flags;
1710
1711         spin_lock_irqsave(&scrq->lock, flags);
1712         entry = &scrq->msgs[scrq->cur];
1713         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1714                 if (++scrq->cur == scrq->size)
1715                         scrq->cur = 0;
1716         } else {
1717                 entry = NULL;
1718         }
1719         spin_unlock_irqrestore(&scrq->lock, flags);
1720
1721         /* Ensure that the entire buffer descriptor has been
1722          * loaded before reading its contents
1723          */
1724         dma_rmb();
1725
1726         return entry;
1727 }
1728
1729 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1730 {
1731         struct ibmvnic_crq_queue *queue = &adapter->crq;
1732         union ibmvnic_crq *crq;
1733
1734         crq = &queue->msgs[queue->cur];
1735         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1736                 if (++queue->cur == queue->size)
1737                         queue->cur = 0;
1738         } else {
1739                 crq = NULL;
1740         }
1741
1742         return crq;
1743 }
1744
1745 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1746                        union sub_crq *sub_crq)
1747 {
1748         unsigned int ua = adapter->vdev->unit_address;
1749         struct device *dev = &adapter->vdev->dev;
1750         u64 *u64_crq = (u64 *)sub_crq;
1751         int rc;
1752
1753         netdev_dbg(adapter->netdev,
1754                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1755                    (unsigned long int)cpu_to_be64(remote_handle),
1756                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1757                    (unsigned long int)cpu_to_be64(u64_crq[1]),
1758                    (unsigned long int)cpu_to_be64(u64_crq[2]),
1759                    (unsigned long int)cpu_to_be64(u64_crq[3]));
1760
1761         /* Make sure the hypervisor sees the complete request */
1762         mb();
1763
1764         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1765                                 cpu_to_be64(remote_handle),
1766                                 cpu_to_be64(u64_crq[0]),
1767                                 cpu_to_be64(u64_crq[1]),
1768                                 cpu_to_be64(u64_crq[2]),
1769                                 cpu_to_be64(u64_crq[3]));
1770
1771         if (rc) {
1772                 if (rc == H_CLOSED)
1773                         dev_warn(dev, "CRQ Queue closed\n");
1774                 dev_err(dev, "Send error (rc=%d)\n", rc);
1775         }
1776
1777         return rc;
1778 }
1779
1780 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
1781                                 u64 remote_handle, u64 ioba, u64 num_entries)
1782 {
1783         unsigned int ua = adapter->vdev->unit_address;
1784         struct device *dev = &adapter->vdev->dev;
1785         int rc;
1786
1787         /* Make sure the hypervisor sees the complete request */
1788         mb();
1789         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
1790                                 cpu_to_be64(remote_handle),
1791                                 ioba, num_entries);
1792
1793         if (rc) {
1794                 if (rc == H_CLOSED)
1795                         dev_warn(dev, "CRQ Queue closed\n");
1796                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
1797         }
1798
1799         return rc;
1800 }
1801
1802 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1803                             union ibmvnic_crq *crq)
1804 {
1805         unsigned int ua = adapter->vdev->unit_address;
1806         struct device *dev = &adapter->vdev->dev;
1807         u64 *u64_crq = (u64 *)crq;
1808         int rc;
1809
1810         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1811                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1812                    (unsigned long int)cpu_to_be64(u64_crq[1]));
1813
1814         /* Make sure the hypervisor sees the complete request */
1815         mb();
1816
1817         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1818                                 cpu_to_be64(u64_crq[0]),
1819                                 cpu_to_be64(u64_crq[1]));
1820
1821         if (rc) {
1822                 if (rc == H_CLOSED)
1823                         dev_warn(dev, "CRQ Queue closed\n");
1824                 dev_warn(dev, "Send error (rc=%d)\n", rc);
1825         }
1826
1827         return rc;
1828 }
1829
1830 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1831 {
1832         union ibmvnic_crq crq;
1833
1834         memset(&crq, 0, sizeof(crq));
1835         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1836         crq.generic.cmd = IBMVNIC_CRQ_INIT;
1837         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1838
1839         return ibmvnic_send_crq(adapter, &crq);
1840 }
1841
1842 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1843 {
1844         union ibmvnic_crq crq;
1845
1846         memset(&crq, 0, sizeof(crq));
1847         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1848         crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1849         netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1850
1851         return ibmvnic_send_crq(adapter, &crq);
1852 }
1853
1854 static int send_version_xchg(struct ibmvnic_adapter *adapter)
1855 {
1856         union ibmvnic_crq crq;
1857
1858         memset(&crq, 0, sizeof(crq));
1859         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1860         crq.version_exchange.cmd = VERSION_EXCHANGE;
1861         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1862
1863         return ibmvnic_send_crq(adapter, &crq);
1864 }
1865
1866 static void send_login(struct ibmvnic_adapter *adapter)
1867 {
1868         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1869         struct ibmvnic_login_buffer *login_buffer;
1870         struct ibmvnic_inflight_cmd *inflight_cmd;
1871         struct device *dev = &adapter->vdev->dev;
1872         dma_addr_t rsp_buffer_token;
1873         dma_addr_t buffer_token;
1874         size_t rsp_buffer_size;
1875         union ibmvnic_crq crq;
1876         unsigned long flags;
1877         size_t buffer_size;
1878         __be64 *tx_list_p;
1879         __be64 *rx_list_p;
1880         int i;
1881
1882         buffer_size =
1883             sizeof(struct ibmvnic_login_buffer) +
1884             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1885
1886         login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1887         if (!login_buffer)
1888                 goto buf_alloc_failed;
1889
1890         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1891                                       DMA_TO_DEVICE);
1892         if (dma_mapping_error(dev, buffer_token)) {
1893                 dev_err(dev, "Couldn't map login buffer\n");
1894                 goto buf_map_failed;
1895         }
1896
1897         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
1898                           sizeof(u64) * adapter->req_tx_queues +
1899                           sizeof(u64) * adapter->req_rx_queues +
1900                           sizeof(u64) * adapter->req_rx_queues +
1901                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
1902
1903         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1904         if (!login_rsp_buffer)
1905                 goto buf_rsp_alloc_failed;
1906
1907         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1908                                           rsp_buffer_size, DMA_FROM_DEVICE);
1909         if (dma_mapping_error(dev, rsp_buffer_token)) {
1910                 dev_err(dev, "Couldn't map login rsp buffer\n");
1911                 goto buf_rsp_map_failed;
1912         }
1913         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
1914         if (!inflight_cmd) {
1915                 dev_err(dev, "Couldn't allocate inflight_cmd\n");
1916                 goto inflight_alloc_failed;
1917         }
1918         adapter->login_buf = login_buffer;
1919         adapter->login_buf_token = buffer_token;
1920         adapter->login_buf_sz = buffer_size;
1921         adapter->login_rsp_buf = login_rsp_buffer;
1922         adapter->login_rsp_buf_token = rsp_buffer_token;
1923         adapter->login_rsp_buf_sz = rsp_buffer_size;
1924
1925         login_buffer->len = cpu_to_be32(buffer_size);
1926         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
1927         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
1928         login_buffer->off_txcomp_subcrqs =
1929             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
1930         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
1931         login_buffer->off_rxcomp_subcrqs =
1932             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
1933                         sizeof(u64) * adapter->req_tx_queues);
1934         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
1935         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
1936
1937         tx_list_p = (__be64 *)((char *)login_buffer +
1938                                       sizeof(struct ibmvnic_login_buffer));
1939         rx_list_p = (__be64 *)((char *)login_buffer +
1940                                       sizeof(struct ibmvnic_login_buffer) +
1941                                       sizeof(u64) * adapter->req_tx_queues);
1942
1943         for (i = 0; i < adapter->req_tx_queues; i++) {
1944                 if (adapter->tx_scrq[i]) {
1945                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
1946                                                    crq_num);
1947                 }
1948         }
1949
1950         for (i = 0; i < adapter->req_rx_queues; i++) {
1951                 if (adapter->rx_scrq[i]) {
1952                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
1953                                                    crq_num);
1954                 }
1955         }
1956
1957         netdev_dbg(adapter->netdev, "Login Buffer:\n");
1958         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
1959                 netdev_dbg(adapter->netdev, "%016lx\n",
1960                            ((unsigned long int *)(adapter->login_buf))[i]);
1961         }
1962
1963         memset(&crq, 0, sizeof(crq));
1964         crq.login.first = IBMVNIC_CRQ_CMD;
1965         crq.login.cmd = LOGIN;
1966         crq.login.ioba = cpu_to_be32(buffer_token);
1967         crq.login.len = cpu_to_be32(buffer_size);
1968
1969         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
1970
1971         spin_lock_irqsave(&adapter->inflight_lock, flags);
1972         list_add_tail(&inflight_cmd->list, &adapter->inflight);
1973         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
1974
1975         ibmvnic_send_crq(adapter, &crq);
1976
1977         return;
1978
1979 inflight_alloc_failed:
1980         dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
1981                          DMA_FROM_DEVICE);
1982 buf_rsp_map_failed:
1983         kfree(login_rsp_buffer);
1984 buf_rsp_alloc_failed:
1985         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
1986 buf_map_failed:
1987         kfree(login_buffer);
1988 buf_alloc_failed:
1989         return;
1990 }
1991
1992 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
1993                              u32 len, u8 map_id)
1994 {
1995         union ibmvnic_crq crq;
1996
1997         memset(&crq, 0, sizeof(crq));
1998         crq.request_map.first = IBMVNIC_CRQ_CMD;
1999         crq.request_map.cmd = REQUEST_MAP;
2000         crq.request_map.map_id = map_id;
2001         crq.request_map.ioba = cpu_to_be32(addr);
2002         crq.request_map.len = cpu_to_be32(len);
2003         ibmvnic_send_crq(adapter, &crq);
2004 }
2005
2006 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2007 {
2008         union ibmvnic_crq crq;
2009
2010         memset(&crq, 0, sizeof(crq));
2011         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2012         crq.request_unmap.cmd = REQUEST_UNMAP;
2013         crq.request_unmap.map_id = map_id;
2014         ibmvnic_send_crq(adapter, &crq);
2015 }
2016
2017 static void send_map_query(struct ibmvnic_adapter *adapter)
2018 {
2019         union ibmvnic_crq crq;
2020
2021         memset(&crq, 0, sizeof(crq));
2022         crq.query_map.first = IBMVNIC_CRQ_CMD;
2023         crq.query_map.cmd = QUERY_MAP;
2024         ibmvnic_send_crq(adapter, &crq);
2025 }
2026
2027 /* Send a series of CRQs requesting various capabilities of the VNIC server */
2028 static void send_cap_queries(struct ibmvnic_adapter *adapter)
2029 {
2030         union ibmvnic_crq crq;
2031
2032         atomic_set(&adapter->running_cap_queries, 0);
2033         memset(&crq, 0, sizeof(crq));
2034         crq.query_capability.first = IBMVNIC_CRQ_CMD;
2035         crq.query_capability.cmd = QUERY_CAPABILITY;
2036
2037         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
2038         atomic_inc(&adapter->running_cap_queries);
2039         ibmvnic_send_crq(adapter, &crq);
2040
2041         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
2042         atomic_inc(&adapter->running_cap_queries);
2043         ibmvnic_send_crq(adapter, &crq);
2044
2045         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
2046         atomic_inc(&adapter->running_cap_queries);
2047         ibmvnic_send_crq(adapter, &crq);
2048
2049         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
2050         atomic_inc(&adapter->running_cap_queries);
2051         ibmvnic_send_crq(adapter, &crq);
2052
2053         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
2054         atomic_inc(&adapter->running_cap_queries);
2055         ibmvnic_send_crq(adapter, &crq);
2056
2057         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
2058         atomic_inc(&adapter->running_cap_queries);
2059         ibmvnic_send_crq(adapter, &crq);
2060
2061         crq.query_capability.capability =
2062             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
2063         atomic_inc(&adapter->running_cap_queries);
2064         ibmvnic_send_crq(adapter, &crq);
2065
2066         crq.query_capability.capability =
2067             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2068         atomic_inc(&adapter->running_cap_queries);
2069         ibmvnic_send_crq(adapter, &crq);
2070
2071         crq.query_capability.capability =
2072             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2073         atomic_inc(&adapter->running_cap_queries);
2074         ibmvnic_send_crq(adapter, &crq);
2075
2076         crq.query_capability.capability =
2077             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2078         atomic_inc(&adapter->running_cap_queries);
2079         ibmvnic_send_crq(adapter, &crq);
2080
2081         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2082         atomic_inc(&adapter->running_cap_queries);
2083         ibmvnic_send_crq(adapter, &crq);
2084
2085         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2086         atomic_inc(&adapter->running_cap_queries);
2087         ibmvnic_send_crq(adapter, &crq);
2088
2089         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2090         atomic_inc(&adapter->running_cap_queries);
2091         ibmvnic_send_crq(adapter, &crq);
2092
2093         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2094         atomic_inc(&adapter->running_cap_queries);
2095         ibmvnic_send_crq(adapter, &crq);
2096
2097         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2098         atomic_inc(&adapter->running_cap_queries);
2099         ibmvnic_send_crq(adapter, &crq);
2100
2101         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2102         atomic_inc(&adapter->running_cap_queries);
2103         ibmvnic_send_crq(adapter, &crq);
2104
2105         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2106         atomic_inc(&adapter->running_cap_queries);
2107         ibmvnic_send_crq(adapter, &crq);
2108
2109         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2110         atomic_inc(&adapter->running_cap_queries);
2111         ibmvnic_send_crq(adapter, &crq);
2112
2113         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2114         atomic_inc(&adapter->running_cap_queries);
2115         ibmvnic_send_crq(adapter, &crq);
2116
2117         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2118         atomic_inc(&adapter->running_cap_queries);
2119         ibmvnic_send_crq(adapter, &crq);
2120
2121         crq.query_capability.capability =
2122                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2123         atomic_inc(&adapter->running_cap_queries);
2124         ibmvnic_send_crq(adapter, &crq);
2125
2126         crq.query_capability.capability =
2127                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2128         atomic_inc(&adapter->running_cap_queries);
2129         ibmvnic_send_crq(adapter, &crq);
2130
2131         crq.query_capability.capability =
2132                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2133         atomic_inc(&adapter->running_cap_queries);
2134         ibmvnic_send_crq(adapter, &crq);
2135
2136         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2137         atomic_inc(&adapter->running_cap_queries);
2138         ibmvnic_send_crq(adapter, &crq);
2139 }
2140
2141 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2142 {
2143         struct device *dev = &adapter->vdev->dev;
2144         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2145         union ibmvnic_crq crq;
2146         int i;
2147
2148         dma_unmap_single(dev, adapter->ip_offload_tok,
2149                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2150
2151         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2152         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2153                 netdev_dbg(adapter->netdev, "%016lx\n",
2154                            ((unsigned long int *)(buf))[i]);
2155
2156         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2157         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2158         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2159                    buf->tcp_ipv4_chksum);
2160         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2161                    buf->tcp_ipv6_chksum);
2162         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2163                    buf->udp_ipv4_chksum);
2164         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2165                    buf->udp_ipv6_chksum);
2166         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2167                    buf->large_tx_ipv4);
2168         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2169                    buf->large_tx_ipv6);
2170         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2171                    buf->large_rx_ipv4);
2172         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2173                    buf->large_rx_ipv6);
2174         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2175                    buf->max_ipv4_header_size);
2176         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2177                    buf->max_ipv6_header_size);
2178         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2179                    buf->max_tcp_header_size);
2180         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2181                    buf->max_udp_header_size);
2182         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2183                    buf->max_large_tx_size);
2184         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2185                    buf->max_large_rx_size);
2186         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2187                    buf->ipv6_extension_header);
2188         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2189                    buf->tcp_pseudosum_req);
2190         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2191                    buf->num_ipv6_ext_headers);
2192         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2193                    buf->off_ipv6_ext_headers);
2194
2195         adapter->ip_offload_ctrl_tok =
2196             dma_map_single(dev, &adapter->ip_offload_ctrl,
2197                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2198
2199         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2200                 dev_err(dev, "Couldn't map ip offload control buffer\n");
2201                 return;
2202         }
2203
2204         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2205         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2206         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2207         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2208         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2209
2210         /* large_tx/rx disabled for now, additional features needed */
2211         adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2212         adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2213         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2214         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2215
2216         adapter->netdev->features = NETIF_F_GSO;
2217
2218         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2219                 adapter->netdev->features |= NETIF_F_IP_CSUM;
2220
2221         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2222                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2223
2224         if ((adapter->netdev->features &
2225             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2226                 adapter->netdev->features |= NETIF_F_RXCSUM;
2227
2228         memset(&crq, 0, sizeof(crq));
2229         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2230         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2231         crq.control_ip_offload.len =
2232             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2233         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2234         ibmvnic_send_crq(adapter, &crq);
2235 }
2236
2237 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2238                                   struct ibmvnic_adapter *adapter)
2239 {
2240         struct device *dev = &adapter->vdev->dev;
2241         struct ibmvnic_error_buff *error_buff, *tmp;
2242         unsigned long flags;
2243         bool found = false;
2244         int i;
2245
2246         if (!crq->request_error_rsp.rc.code) {
2247                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2248                          crq->request_error_rsp.rc.code);
2249                 return;
2250         }
2251
2252         spin_lock_irqsave(&adapter->error_list_lock, flags);
2253         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2254                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2255                         found = true;
2256                         list_del(&error_buff->list);
2257                         break;
2258                 }
2259         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2260
2261         if (!found) {
2262                 dev_err(dev, "Couldn't find error id %x\n",
2263                         be32_to_cpu(crq->request_error_rsp.error_id));
2264                 return;
2265         }
2266
2267         dev_err(dev, "Detailed info for error id %x:",
2268                 be32_to_cpu(crq->request_error_rsp.error_id));
2269
2270         for (i = 0; i < error_buff->len; i++) {
2271                 pr_cont("%02x", (int)error_buff->buff[i]);
2272                 if (i % 8 == 7)
2273                         pr_cont(" ");
2274         }
2275         pr_cont("\n");
2276
2277         dma_unmap_single(dev, error_buff->dma, error_buff->len,
2278                          DMA_FROM_DEVICE);
2279         kfree(error_buff->buff);
2280         kfree(error_buff);
2281 }
2282
2283 static void handle_dump_size_rsp(union ibmvnic_crq *crq,
2284                                  struct ibmvnic_adapter *adapter)
2285 {
2286         int len = be32_to_cpu(crq->request_dump_size_rsp.len);
2287         struct ibmvnic_inflight_cmd *inflight_cmd;
2288         struct device *dev = &adapter->vdev->dev;
2289         union ibmvnic_crq newcrq;
2290         unsigned long flags;
2291
2292         /* allocate and map buffer */
2293         adapter->dump_data = kmalloc(len, GFP_KERNEL);
2294         if (!adapter->dump_data) {
2295                 complete(&adapter->fw_done);
2296                 return;
2297         }
2298
2299         adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len,
2300                                                   DMA_FROM_DEVICE);
2301
2302         if (dma_mapping_error(dev, adapter->dump_data_token)) {
2303                 if (!firmware_has_feature(FW_FEATURE_CMO))
2304                         dev_err(dev, "Couldn't map dump data\n");
2305                 kfree(adapter->dump_data);
2306                 complete(&adapter->fw_done);
2307                 return;
2308         }
2309
2310         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2311         if (!inflight_cmd) {
2312                 dma_unmap_single(dev, adapter->dump_data_token, len,
2313                                  DMA_FROM_DEVICE);
2314                 kfree(adapter->dump_data);
2315                 complete(&adapter->fw_done);
2316                 return;
2317         }
2318
2319         memset(&newcrq, 0, sizeof(newcrq));
2320         newcrq.request_dump.first = IBMVNIC_CRQ_CMD;
2321         newcrq.request_dump.cmd = REQUEST_DUMP;
2322         newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token);
2323         newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size);
2324
2325         memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq));
2326
2327         spin_lock_irqsave(&adapter->inflight_lock, flags);
2328         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2329         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2330
2331         ibmvnic_send_crq(adapter, &newcrq);
2332 }
2333
2334 static void handle_error_indication(union ibmvnic_crq *crq,
2335                                     struct ibmvnic_adapter *adapter)
2336 {
2337         int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2338         struct ibmvnic_inflight_cmd *inflight_cmd;
2339         struct device *dev = &adapter->vdev->dev;
2340         struct ibmvnic_error_buff *error_buff;
2341         union ibmvnic_crq new_crq;
2342         unsigned long flags;
2343
2344         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2345                 crq->error_indication.
2346                     flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2347                 be32_to_cpu(crq->error_indication.error_id),
2348                 be16_to_cpu(crq->error_indication.error_cause));
2349
2350         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2351         if (!error_buff)
2352                 return;
2353
2354         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2355         if (!error_buff->buff) {
2356                 kfree(error_buff);
2357                 return;
2358         }
2359
2360         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2361                                          DMA_FROM_DEVICE);
2362         if (dma_mapping_error(dev, error_buff->dma)) {
2363                 if (!firmware_has_feature(FW_FEATURE_CMO))
2364                         dev_err(dev, "Couldn't map error buffer\n");
2365                 kfree(error_buff->buff);
2366                 kfree(error_buff);
2367                 return;
2368         }
2369
2370         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2371         if (!inflight_cmd) {
2372                 dma_unmap_single(dev, error_buff->dma, detail_len,
2373                                  DMA_FROM_DEVICE);
2374                 kfree(error_buff->buff);
2375                 kfree(error_buff);
2376                 return;
2377         }
2378
2379         error_buff->len = detail_len;
2380         error_buff->error_id = crq->error_indication.error_id;
2381
2382         spin_lock_irqsave(&adapter->error_list_lock, flags);
2383         list_add_tail(&error_buff->list, &adapter->errors);
2384         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2385
2386         memset(&new_crq, 0, sizeof(new_crq));
2387         new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2388         new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2389         new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2390         new_crq.request_error_info.len = cpu_to_be32(detail_len);
2391         new_crq.request_error_info.error_id = crq->error_indication.error_id;
2392
2393         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2394
2395         spin_lock_irqsave(&adapter->inflight_lock, flags);
2396         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2397         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2398
2399         ibmvnic_send_crq(adapter, &new_crq);
2400 }
2401
2402 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2403                                   struct ibmvnic_adapter *adapter)
2404 {
2405         struct net_device *netdev = adapter->netdev;
2406         struct device *dev = &adapter->vdev->dev;
2407         long rc;
2408
2409         rc = crq->change_mac_addr_rsp.rc.code;
2410         if (rc) {
2411                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2412                 return;
2413         }
2414         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2415                ETH_ALEN);
2416 }
2417
2418 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2419                                    struct ibmvnic_adapter *adapter)
2420 {
2421         struct device *dev = &adapter->vdev->dev;
2422         u64 *req_value;
2423         char *name;
2424
2425         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2426         case REQ_TX_QUEUES:
2427                 req_value = &adapter->req_tx_queues;
2428                 name = "tx";
2429                 break;
2430         case REQ_RX_QUEUES:
2431                 req_value = &adapter->req_rx_queues;
2432                 name = "rx";
2433                 break;
2434         case REQ_RX_ADD_QUEUES:
2435                 req_value = &adapter->req_rx_add_queues;
2436                 name = "rx_add";
2437                 break;
2438         case REQ_TX_ENTRIES_PER_SUBCRQ:
2439                 req_value = &adapter->req_tx_entries_per_subcrq;
2440                 name = "tx_entries_per_subcrq";
2441                 break;
2442         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2443                 req_value = &adapter->req_rx_add_entries_per_subcrq;
2444                 name = "rx_add_entries_per_subcrq";
2445                 break;
2446         case REQ_MTU:
2447                 req_value = &adapter->req_mtu;
2448                 name = "mtu";
2449                 break;
2450         case PROMISC_REQUESTED:
2451                 req_value = &adapter->promisc;
2452                 name = "promisc";
2453                 break;
2454         default:
2455                 dev_err(dev, "Got invalid cap request rsp %d\n",
2456                         crq->request_capability.capability);
2457                 return;
2458         }
2459
2460         switch (crq->request_capability_rsp.rc.code) {
2461         case SUCCESS:
2462                 break;
2463         case PARTIALSUCCESS:
2464                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2465                          *req_value,
2466                          (long int)be64_to_cpu(crq->request_capability_rsp.
2467                                                number), name);
2468                 release_sub_crqs_no_irqs(adapter);
2469                 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
2470                 init_sub_crqs(adapter, 1);
2471                 return;
2472         default:
2473                 dev_err(dev, "Error %d in request cap rsp\n",
2474                         crq->request_capability_rsp.rc.code);
2475                 return;
2476         }
2477
2478         /* Done receiving requested capabilities, query IP offload support */
2479         if (++adapter->requested_caps == 7) {
2480                 union ibmvnic_crq newcrq;
2481                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2482                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2483                     &adapter->ip_offload_buf;
2484
2485                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2486                                                          buf_sz,
2487                                                          DMA_FROM_DEVICE);
2488
2489                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2490                         if (!firmware_has_feature(FW_FEATURE_CMO))
2491                                 dev_err(dev, "Couldn't map offload buffer\n");
2492                         return;
2493                 }
2494
2495                 memset(&newcrq, 0, sizeof(newcrq));
2496                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2497                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2498                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2499                 newcrq.query_ip_offload.ioba =
2500                     cpu_to_be32(adapter->ip_offload_tok);
2501
2502                 ibmvnic_send_crq(adapter, &newcrq);
2503         }
2504 }
2505
2506 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2507                             struct ibmvnic_adapter *adapter)
2508 {
2509         struct device *dev = &adapter->vdev->dev;
2510         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2511         struct ibmvnic_login_buffer *login = adapter->login_buf;
2512         union ibmvnic_crq crq;
2513         int i;
2514
2515         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2516                          DMA_BIDIRECTIONAL);
2517         dma_unmap_single(dev, adapter->login_rsp_buf_token,
2518                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2519
2520         /* If the number of queues requested can't be allocated by the
2521          * server, the login response will return with code 1. We will need
2522          * to resend the login buffer with fewer queues requested.
2523          */
2524         if (login_rsp_crq->generic.rc.code) {
2525                 adapter->renegotiate = true;
2526                 complete(&adapter->init_done);
2527                 return 0;
2528         }
2529
2530         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2531         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2532                 netdev_dbg(adapter->netdev, "%016lx\n",
2533                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2534         }
2535
2536         /* Sanity checks */
2537         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2538             (be32_to_cpu(login->num_rxcomp_subcrqs) *
2539              adapter->req_rx_add_queues !=
2540              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2541                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2542                 ibmvnic_remove(adapter->vdev);
2543                 return -EIO;
2544         }
2545         complete(&adapter->init_done);
2546
2547         memset(&crq, 0, sizeof(crq));
2548         crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD;
2549         crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM;
2550         ibmvnic_send_crq(adapter, &crq);
2551
2552         return 0;
2553 }
2554
2555 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2556                                    struct ibmvnic_adapter *adapter)
2557 {
2558         struct device *dev = &adapter->vdev->dev;
2559         u8 map_id = crq->request_map_rsp.map_id;
2560         int tx_subcrqs;
2561         int rx_subcrqs;
2562         long rc;
2563         int i;
2564
2565         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2566         rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2567
2568         rc = crq->request_map_rsp.rc.code;
2569         if (rc) {
2570                 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2571                 adapter->map_id--;
2572                 /* need to find and zero tx/rx_pool map_id */
2573                 for (i = 0; i < tx_subcrqs; i++) {
2574                         if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2575                                 adapter->tx_pool[i].long_term_buff.map_id = 0;
2576                 }
2577                 for (i = 0; i < rx_subcrqs; i++) {
2578                         if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2579                                 adapter->rx_pool[i].long_term_buff.map_id = 0;
2580                 }
2581         }
2582         complete(&adapter->fw_done);
2583 }
2584
2585 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2586                                      struct ibmvnic_adapter *adapter)
2587 {
2588         struct device *dev = &adapter->vdev->dev;
2589         long rc;
2590
2591         rc = crq->request_unmap_rsp.rc.code;
2592         if (rc)
2593                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2594 }
2595
2596 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2597                                  struct ibmvnic_adapter *adapter)
2598 {
2599         struct net_device *netdev = adapter->netdev;
2600         struct device *dev = &adapter->vdev->dev;
2601         long rc;
2602
2603         rc = crq->query_map_rsp.rc.code;
2604         if (rc) {
2605                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2606                 return;
2607         }
2608         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2609                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2610                    crq->query_map_rsp.free_pages);
2611 }
2612
2613 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2614                                  struct ibmvnic_adapter *adapter)
2615 {
2616         struct net_device *netdev = adapter->netdev;
2617         struct device *dev = &adapter->vdev->dev;
2618         long rc;
2619
2620         atomic_dec(&adapter->running_cap_queries);
2621         netdev_dbg(netdev, "Outstanding queries: %d\n",
2622                    atomic_read(&adapter->running_cap_queries));
2623         rc = crq->query_capability.rc.code;
2624         if (rc) {
2625                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2626                 goto out;
2627         }
2628
2629         switch (be16_to_cpu(crq->query_capability.capability)) {
2630         case MIN_TX_QUEUES:
2631                 adapter->min_tx_queues =
2632                     be64_to_cpu(crq->query_capability.number);
2633                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2634                            adapter->min_tx_queues);
2635                 break;
2636         case MIN_RX_QUEUES:
2637                 adapter->min_rx_queues =
2638                     be64_to_cpu(crq->query_capability.number);
2639                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2640                            adapter->min_rx_queues);
2641                 break;
2642         case MIN_RX_ADD_QUEUES:
2643                 adapter->min_rx_add_queues =
2644                     be64_to_cpu(crq->query_capability.number);
2645                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2646                            adapter->min_rx_add_queues);
2647                 break;
2648         case MAX_TX_QUEUES:
2649                 adapter->max_tx_queues =
2650                     be64_to_cpu(crq->query_capability.number);
2651                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2652                            adapter->max_tx_queues);
2653                 break;
2654         case MAX_RX_QUEUES:
2655                 adapter->max_rx_queues =
2656                     be64_to_cpu(crq->query_capability.number);
2657                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2658                            adapter->max_rx_queues);
2659                 break;
2660         case MAX_RX_ADD_QUEUES:
2661                 adapter->max_rx_add_queues =
2662                     be64_to_cpu(crq->query_capability.number);
2663                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2664                            adapter->max_rx_add_queues);
2665                 break;
2666         case MIN_TX_ENTRIES_PER_SUBCRQ:
2667                 adapter->min_tx_entries_per_subcrq =
2668                     be64_to_cpu(crq->query_capability.number);
2669                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2670                            adapter->min_tx_entries_per_subcrq);
2671                 break;
2672         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2673                 adapter->min_rx_add_entries_per_subcrq =
2674                     be64_to_cpu(crq->query_capability.number);
2675                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2676                            adapter->min_rx_add_entries_per_subcrq);
2677                 break;
2678         case MAX_TX_ENTRIES_PER_SUBCRQ:
2679                 adapter->max_tx_entries_per_subcrq =
2680                     be64_to_cpu(crq->query_capability.number);
2681                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2682                            adapter->max_tx_entries_per_subcrq);
2683                 break;
2684         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2685                 adapter->max_rx_add_entries_per_subcrq =
2686                     be64_to_cpu(crq->query_capability.number);
2687                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2688                            adapter->max_rx_add_entries_per_subcrq);
2689                 break;
2690         case TCP_IP_OFFLOAD:
2691                 adapter->tcp_ip_offload =
2692                     be64_to_cpu(crq->query_capability.number);
2693                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2694                            adapter->tcp_ip_offload);
2695                 break;
2696         case PROMISC_SUPPORTED:
2697                 adapter->promisc_supported =
2698                     be64_to_cpu(crq->query_capability.number);
2699                 netdev_dbg(netdev, "promisc_supported = %lld\n",
2700                            adapter->promisc_supported);
2701                 break;
2702         case MIN_MTU:
2703                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
2704                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2705                 break;
2706         case MAX_MTU:
2707                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
2708                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2709                 break;
2710         case MAX_MULTICAST_FILTERS:
2711                 adapter->max_multicast_filters =
2712                     be64_to_cpu(crq->query_capability.number);
2713                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2714                            adapter->max_multicast_filters);
2715                 break;
2716         case VLAN_HEADER_INSERTION:
2717                 adapter->vlan_header_insertion =
2718                     be64_to_cpu(crq->query_capability.number);
2719                 if (adapter->vlan_header_insertion)
2720                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2721                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2722                            adapter->vlan_header_insertion);
2723                 break;
2724         case MAX_TX_SG_ENTRIES:
2725                 adapter->max_tx_sg_entries =
2726                     be64_to_cpu(crq->query_capability.number);
2727                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2728                            adapter->max_tx_sg_entries);
2729                 break;
2730         case RX_SG_SUPPORTED:
2731                 adapter->rx_sg_supported =
2732                     be64_to_cpu(crq->query_capability.number);
2733                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2734                            adapter->rx_sg_supported);
2735                 break;
2736         case OPT_TX_COMP_SUB_QUEUES:
2737                 adapter->opt_tx_comp_sub_queues =
2738                     be64_to_cpu(crq->query_capability.number);
2739                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2740                            adapter->opt_tx_comp_sub_queues);
2741                 break;
2742         case OPT_RX_COMP_QUEUES:
2743                 adapter->opt_rx_comp_queues =
2744                     be64_to_cpu(crq->query_capability.number);
2745                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2746                            adapter->opt_rx_comp_queues);
2747                 break;
2748         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2749                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
2750                     be64_to_cpu(crq->query_capability.number);
2751                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2752                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
2753                 break;
2754         case OPT_TX_ENTRIES_PER_SUBCRQ:
2755                 adapter->opt_tx_entries_per_subcrq =
2756                     be64_to_cpu(crq->query_capability.number);
2757                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2758                            adapter->opt_tx_entries_per_subcrq);
2759                 break;
2760         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2761                 adapter->opt_rxba_entries_per_subcrq =
2762                     be64_to_cpu(crq->query_capability.number);
2763                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2764                            adapter->opt_rxba_entries_per_subcrq);
2765                 break;
2766         case TX_RX_DESC_REQ:
2767                 adapter->tx_rx_desc_req = crq->query_capability.number;
2768                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2769                            adapter->tx_rx_desc_req);
2770                 break;
2771
2772         default:
2773                 netdev_err(netdev, "Got invalid cap rsp %d\n",
2774                            crq->query_capability.capability);
2775         }
2776
2777 out:
2778         if (atomic_read(&adapter->running_cap_queries) == 0)
2779                 init_sub_crqs(adapter, 0);
2780                 /* We're done querying the capabilities, initialize sub-crqs */
2781 }
2782
2783 static void handle_control_ras_rsp(union ibmvnic_crq *crq,
2784                                    struct ibmvnic_adapter *adapter)
2785 {
2786         u8 correlator = crq->control_ras_rsp.correlator;
2787         struct device *dev = &adapter->vdev->dev;
2788         bool found = false;
2789         int i;
2790
2791         if (crq->control_ras_rsp.rc.code) {
2792                 dev_warn(dev, "Control ras failed rc=%d\n",
2793                          crq->control_ras_rsp.rc.code);
2794                 return;
2795         }
2796
2797         for (i = 0; i < adapter->ras_comp_num; i++) {
2798                 if (adapter->ras_comps[i].correlator == correlator) {
2799                         found = true;
2800                         break;
2801                 }
2802         }
2803
2804         if (!found) {
2805                 dev_warn(dev, "Correlator not found on control_ras_rsp\n");
2806                 return;
2807         }
2808
2809         switch (crq->control_ras_rsp.op) {
2810         case IBMVNIC_TRACE_LEVEL:
2811                 adapter->ras_comps[i].trace_level = crq->control_ras.level;
2812                 break;
2813         case IBMVNIC_ERROR_LEVEL:
2814                 adapter->ras_comps[i].error_check_level =
2815                     crq->control_ras.level;
2816                 break;
2817         case IBMVNIC_TRACE_PAUSE:
2818                 adapter->ras_comp_int[i].paused = 1;
2819                 break;
2820         case IBMVNIC_TRACE_RESUME:
2821                 adapter->ras_comp_int[i].paused = 0;
2822                 break;
2823         case IBMVNIC_TRACE_ON:
2824                 adapter->ras_comps[i].trace_on = 1;
2825                 break;
2826         case IBMVNIC_TRACE_OFF:
2827                 adapter->ras_comps[i].trace_on = 0;
2828                 break;
2829         case IBMVNIC_CHG_TRACE_BUFF_SZ:
2830                 /* trace_buff_sz is 3 bytes, stuff it into an int */
2831                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0;
2832                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] =
2833                     crq->control_ras_rsp.trace_buff_sz[0];
2834                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] =
2835                     crq->control_ras_rsp.trace_buff_sz[1];
2836                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] =
2837                     crq->control_ras_rsp.trace_buff_sz[2];
2838                 break;
2839         default:
2840                 dev_err(dev, "invalid op %d on control_ras_rsp",
2841                         crq->control_ras_rsp.op);
2842         }
2843 }
2844
2845 static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len,
2846                           loff_t *ppos)
2847 {
2848         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2849         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2850         struct device *dev = &adapter->vdev->dev;
2851         struct ibmvnic_fw_trace_entry *trace;
2852         int num = ras_comp_int->num;
2853         union ibmvnic_crq crq;
2854         dma_addr_t trace_tok;
2855
2856         if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2857                 return 0;
2858
2859         trace =
2860             dma_alloc_coherent(dev,
2861                                be32_to_cpu(adapter->ras_comps[num].
2862                                            trace_buff_size), &trace_tok,
2863                                GFP_KERNEL);
2864         if (!trace) {
2865                 dev_err(dev, "Couldn't alloc trace buffer\n");
2866                 return 0;
2867         }
2868
2869         memset(&crq, 0, sizeof(crq));
2870         crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD;
2871         crq.collect_fw_trace.cmd = COLLECT_FW_TRACE;
2872         crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator;
2873         crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok);
2874         crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size;
2875
2876         init_completion(&adapter->fw_done);
2877         ibmvnic_send_crq(adapter, &crq);
2878         wait_for_completion(&adapter->fw_done);
2879
2880         if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2881                 len =
2882                     be32_to_cpu(adapter->ras_comps[num].trace_buff_size) -
2883                     *ppos;
2884
2885         copy_to_user(user_buf, &((u8 *)trace)[*ppos], len);
2886
2887         dma_free_coherent(dev,
2888                           be32_to_cpu(adapter->ras_comps[num].trace_buff_size),
2889                           trace, trace_tok);
2890         *ppos += len;
2891         return len;
2892 }
2893
2894 static const struct file_operations trace_ops = {
2895         .owner          = THIS_MODULE,
2896         .open           = simple_open,
2897         .read           = trace_read,
2898 };
2899
2900 static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len,
2901                            loff_t *ppos)
2902 {
2903         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2904         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2905         int num = ras_comp_int->num;
2906         char buff[5]; /*  1 or 0 plus \n and \0 */
2907         int size;
2908
2909         size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused);
2910
2911         if (*ppos >= size)
2912                 return 0;
2913
2914         copy_to_user(user_buf, buff, size);
2915         *ppos += size;
2916         return size;
2917 }
2918
2919 static ssize_t paused_write(struct file *file, const char __user *user_buf,
2920                             size_t len, loff_t *ppos)
2921 {
2922         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2923         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2924         int num = ras_comp_int->num;
2925         union ibmvnic_crq crq;
2926         unsigned long val;
2927         char buff[9]; /* decimal max int plus \n and \0 */
2928
2929         copy_from_user(buff, user_buf, sizeof(buff));
2930         val = kstrtoul(buff, 10, NULL);
2931
2932         adapter->ras_comp_int[num].paused = val ? 1 : 0;
2933
2934         memset(&crq, 0, sizeof(crq));
2935         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2936         crq.control_ras.cmd = CONTROL_RAS;
2937         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2938         crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME;
2939         ibmvnic_send_crq(adapter, &crq);
2940
2941         return len;
2942 }
2943
2944 static const struct file_operations paused_ops = {
2945         .owner          = THIS_MODULE,
2946         .open           = simple_open,
2947         .read           = paused_read,
2948         .write          = paused_write,
2949 };
2950
2951 static ssize_t tracing_read(struct file *file, char __user *user_buf,
2952                             size_t len, loff_t *ppos)
2953 {
2954         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2955         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2956         int num = ras_comp_int->num;
2957         char buff[5]; /*  1 or 0 plus \n and \0 */
2958         int size;
2959
2960         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on);
2961
2962         if (*ppos >= size)
2963                 return 0;
2964
2965         copy_to_user(user_buf, buff, size);
2966         *ppos += size;
2967         return size;
2968 }
2969
2970 static ssize_t tracing_write(struct file *file, const char __user *user_buf,
2971                              size_t len, loff_t *ppos)
2972 {
2973         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2974         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2975         int num = ras_comp_int->num;
2976         union ibmvnic_crq crq;
2977         unsigned long val;
2978         char buff[9]; /* decimal max int plus \n and \0 */
2979
2980         copy_from_user(buff, user_buf, sizeof(buff));
2981         val = kstrtoul(buff, 10, NULL);
2982
2983         memset(&crq, 0, sizeof(crq));
2984         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2985         crq.control_ras.cmd = CONTROL_RAS;
2986         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2987         crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF;
2988
2989         return len;
2990 }
2991
2992 static const struct file_operations tracing_ops = {
2993         .owner          = THIS_MODULE,
2994         .open           = simple_open,
2995         .read           = tracing_read,
2996         .write          = tracing_write,
2997 };
2998
2999 static ssize_t error_level_read(struct file *file, char __user *user_buf,
3000                                 size_t len, loff_t *ppos)
3001 {
3002         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3003         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3004         int num = ras_comp_int->num;
3005         char buff[5]; /* decimal max char plus \n and \0 */
3006         int size;
3007
3008         size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level);
3009
3010         if (*ppos >= size)
3011                 return 0;
3012
3013         copy_to_user(user_buf, buff, size);
3014         *ppos += size;
3015         return size;
3016 }
3017
3018 static ssize_t error_level_write(struct file *file, const char __user *user_buf,
3019                                  size_t len, loff_t *ppos)
3020 {
3021         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3022         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3023         int num = ras_comp_int->num;
3024         union ibmvnic_crq crq;
3025         unsigned long val;
3026         char buff[9]; /* decimal max int plus \n and \0 */
3027
3028         copy_from_user(buff, user_buf, sizeof(buff));
3029         val = kstrtoul(buff, 10, NULL);
3030
3031         if (val > 9)
3032                 val = 9;
3033
3034         memset(&crq, 0, sizeof(crq));
3035         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3036         crq.control_ras.cmd = CONTROL_RAS;
3037         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
3038         crq.control_ras.op = IBMVNIC_ERROR_LEVEL;
3039         crq.control_ras.level = val;
3040         ibmvnic_send_crq(adapter, &crq);
3041
3042         return len;
3043 }
3044
3045 static const struct file_operations error_level_ops = {
3046         .owner          = THIS_MODULE,
3047         .open           = simple_open,
3048         .read           = error_level_read,
3049         .write          = error_level_write,
3050 };
3051
3052 static ssize_t trace_level_read(struct file *file, char __user *user_buf,
3053                                 size_t len, loff_t *ppos)
3054 {
3055         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3056         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3057         int num = ras_comp_int->num;
3058         char buff[5]; /* decimal max char plus \n and \0 */
3059         int size;
3060
3061         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level);
3062         if (*ppos >= size)
3063                 return 0;
3064
3065         copy_to_user(user_buf, buff, size);
3066         *ppos += size;
3067         return size;
3068 }
3069
3070 static ssize_t trace_level_write(struct file *file, const char __user *user_buf,
3071                                  size_t len, loff_t *ppos)
3072 {
3073         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3074         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3075         union ibmvnic_crq crq;
3076         unsigned long val;
3077         char buff[9]; /* decimal max int plus \n and \0 */
3078
3079         copy_from_user(buff, user_buf, sizeof(buff));
3080         val = kstrtoul(buff, 10, NULL);
3081         if (val > 9)
3082                 val = 9;
3083
3084         memset(&crq, 0, sizeof(crq));
3085         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3086         crq.control_ras.cmd = CONTROL_RAS;
3087         crq.control_ras.correlator =
3088             adapter->ras_comps[ras_comp_int->num].correlator;
3089         crq.control_ras.op = IBMVNIC_TRACE_LEVEL;
3090         crq.control_ras.level = val;
3091         ibmvnic_send_crq(adapter, &crq);
3092
3093         return len;
3094 }
3095
3096 static const struct file_operations trace_level_ops = {
3097         .owner          = THIS_MODULE,
3098         .open           = simple_open,
3099         .read           = trace_level_read,
3100         .write          = trace_level_write,
3101 };
3102
3103 static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf,
3104                                     size_t len, loff_t *ppos)
3105 {
3106         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3107         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3108         int num = ras_comp_int->num;
3109         char buff[9]; /* decimal max int plus \n and \0 */
3110         int size;
3111
3112         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size);
3113         if (*ppos >= size)
3114                 return 0;
3115
3116         copy_to_user(user_buf, buff, size);
3117         *ppos += size;
3118         return size;
3119 }
3120
3121 static ssize_t trace_buff_size_write(struct file *file,
3122                                      const char __user *user_buf, size_t len,
3123                                      loff_t *ppos)
3124 {
3125         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3126         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3127         union ibmvnic_crq crq;
3128         unsigned long val;
3129         char buff[9]; /* decimal max int plus \n and \0 */
3130
3131         copy_from_user(buff, user_buf, sizeof(buff));
3132         val = kstrtoul(buff, 10, NULL);
3133
3134         memset(&crq, 0, sizeof(crq));
3135         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3136         crq.control_ras.cmd = CONTROL_RAS;
3137         crq.control_ras.correlator =
3138             adapter->ras_comps[ras_comp_int->num].correlator;
3139         crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ;
3140         /* trace_buff_sz is 3 bytes, stuff an int into it */
3141         crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5];
3142         crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6];
3143         crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7];
3144         ibmvnic_send_crq(adapter, &crq);
3145
3146         return len;
3147 }
3148
3149 static const struct file_operations trace_size_ops = {
3150         .owner          = THIS_MODULE,
3151         .open           = simple_open,
3152         .read           = trace_buff_size_read,
3153         .write          = trace_buff_size_write,
3154 };
3155
3156 static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq,
3157                                          struct ibmvnic_adapter *adapter)
3158 {
3159         struct device *dev = &adapter->vdev->dev;
3160         struct dentry *dir_ent;
3161         struct dentry *ent;
3162         int i;
3163
3164         debugfs_remove_recursive(adapter->ras_comps_ent);
3165
3166         adapter->ras_comps_ent = debugfs_create_dir("ras_comps",
3167                                                     adapter->debugfs_dir);
3168         if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) {
3169                 dev_info(dev, "debugfs create ras_comps dir failed\n");
3170                 return;
3171         }
3172
3173         for (i = 0; i < adapter->ras_comp_num; i++) {
3174                 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name,
3175                                              adapter->ras_comps_ent);
3176                 if (!dir_ent || IS_ERR(dir_ent)) {
3177                         dev_info(dev, "debugfs create %s dir failed\n",
3178                                  adapter->ras_comps[i].name);
3179                         continue;
3180                 }
3181
3182                 adapter->ras_comp_int[i].adapter = adapter;
3183                 adapter->ras_comp_int[i].num = i;
3184                 adapter->ras_comp_int[i].desc_blob.data =
3185                     &adapter->ras_comps[i].description;
3186                 adapter->ras_comp_int[i].desc_blob.size =
3187                     sizeof(adapter->ras_comps[i].description);
3188
3189                 /* Don't need to remember the dentry's because the debugfs dir
3190                  * gets removed recursively
3191                  */
3192                 ent = debugfs_create_blob("description", S_IRUGO, dir_ent,
3193                                           &adapter->ras_comp_int[i].desc_blob);
3194                 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR,
3195                                           dir_ent, &adapter->ras_comp_int[i],
3196                                           &trace_size_ops);
3197                 ent = debugfs_create_file("trace_level",
3198                                           S_IRUGO |
3199                                           (adapter->ras_comps[i].trace_level !=
3200                                            0xFF  ? S_IWUSR : 0),
3201                                            dir_ent, &adapter->ras_comp_int[i],
3202                                            &trace_level_ops);
3203                 ent = debugfs_create_file("error_level",
3204                                           S_IRUGO |
3205                                           (adapter->
3206                                            ras_comps[i].error_check_level !=
3207                                            0xFF ? S_IWUSR : 0),
3208                                           dir_ent, &adapter->ras_comp_int[i],
3209                                           &trace_level_ops);
3210                 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR,
3211                                           dir_ent, &adapter->ras_comp_int[i],
3212                                           &tracing_ops);
3213                 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR,
3214                                           dir_ent, &adapter->ras_comp_int[i],
3215                                           &paused_ops);
3216                 ent = debugfs_create_file("trace", S_IRUGO, dir_ent,
3217                                           &adapter->ras_comp_int[i],
3218                                           &trace_ops);
3219         }
3220 }
3221
3222 static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq,
3223                                             struct ibmvnic_adapter *adapter)
3224 {
3225         int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component);
3226         struct device *dev = &adapter->vdev->dev;
3227         union ibmvnic_crq newcrq;
3228
3229         adapter->ras_comps = dma_alloc_coherent(dev, len,
3230                                                 &adapter->ras_comps_tok,
3231                                                 GFP_KERNEL);
3232         if (!adapter->ras_comps) {
3233                 if (!firmware_has_feature(FW_FEATURE_CMO))
3234                         dev_err(dev, "Couldn't alloc fw comps buffer\n");
3235                 return;
3236         }
3237
3238         adapter->ras_comp_int = kmalloc(adapter->ras_comp_num *
3239                                         sizeof(struct ibmvnic_fw_comp_internal),
3240                                         GFP_KERNEL);
3241         if (!adapter->ras_comp_int)
3242                 dma_free_coherent(dev, len, adapter->ras_comps,
3243                                   adapter->ras_comps_tok);
3244
3245         memset(&newcrq, 0, sizeof(newcrq));
3246         newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD;
3247         newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS;
3248         newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok);
3249         newcrq.request_ras_comps.len = cpu_to_be32(len);
3250         ibmvnic_send_crq(adapter, &newcrq);
3251 }
3252
3253 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
3254 {
3255         struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1;
3256         struct device *dev = &adapter->vdev->dev;
3257         struct ibmvnic_error_buff *error_buff, *tmp2;
3258         unsigned long flags;
3259         unsigned long flags2;
3260
3261         spin_lock_irqsave(&adapter->inflight_lock, flags);
3262         list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) {
3263                 switch (inflight_cmd->crq.generic.cmd) {
3264                 case LOGIN:
3265                         dma_unmap_single(dev, adapter->login_buf_token,
3266                                          adapter->login_buf_sz,
3267                                          DMA_BIDIRECTIONAL);
3268                         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3269                                          adapter->login_rsp_buf_sz,
3270                                          DMA_BIDIRECTIONAL);
3271                         kfree(adapter->login_rsp_buf);
3272                         kfree(adapter->login_buf);
3273                         break;
3274                 case REQUEST_DUMP:
3275                         complete(&adapter->fw_done);
3276                         break;
3277                 case REQUEST_ERROR_INFO:
3278                         spin_lock_irqsave(&adapter->error_list_lock, flags2);
3279                         list_for_each_entry_safe(error_buff, tmp2,
3280                                                  &adapter->errors, list) {
3281                                 dma_unmap_single(dev, error_buff->dma,
3282                                                  error_buff->len,
3283                                                  DMA_FROM_DEVICE);
3284                                 kfree(error_buff->buff);
3285                                 list_del(&error_buff->list);
3286                                 kfree(error_buff);
3287                         }
3288                         spin_unlock_irqrestore(&adapter->error_list_lock,
3289                                                flags2);
3290                         break;
3291                 }
3292                 list_del(&inflight_cmd->list);
3293                 kfree(inflight_cmd);
3294         }
3295         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
3296 }
3297
3298 static void ibmvnic_xport_event(struct work_struct *work)
3299 {
3300         struct ibmvnic_adapter *adapter = container_of(work,
3301                                                        struct ibmvnic_adapter,
3302                                                        ibmvnic_xport);
3303         struct device *dev = &adapter->vdev->dev;
3304         long rc;
3305
3306         ibmvnic_free_inflight(adapter);
3307         release_sub_crqs(adapter);
3308         if (adapter->migrated) {
3309                 rc = ibmvnic_reenable_crq_queue(adapter);
3310                 if (rc)
3311                         dev_err(dev, "Error after enable rc=%ld\n", rc);
3312                 adapter->migrated = false;
3313                 rc = ibmvnic_send_crq_init(adapter);
3314                 if (rc)
3315                         dev_err(dev, "Error sending init rc=%ld\n", rc);
3316         }
3317 }
3318
3319 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3320                                struct ibmvnic_adapter *adapter)
3321 {
3322         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3323         struct net_device *netdev = adapter->netdev;
3324         struct device *dev = &adapter->vdev->dev;
3325         long rc;
3326
3327         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3328                    ((unsigned long int *)crq)[0],
3329                    ((unsigned long int *)crq)[1]);
3330         switch (gen_crq->first) {
3331         case IBMVNIC_CRQ_INIT_RSP:
3332                 switch (gen_crq->cmd) {
3333                 case IBMVNIC_CRQ_INIT:
3334                         dev_info(dev, "Partner initialized\n");
3335                         /* Send back a response */
3336                         rc = ibmvnic_send_crq_init_complete(adapter);
3337                         if (!rc)
3338                                 schedule_work(&adapter->vnic_crq_init);
3339                         else
3340                                 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
3341                         break;
3342                 case IBMVNIC_CRQ_INIT_COMPLETE:
3343                         dev_info(dev, "Partner initialization complete\n");
3344                         send_version_xchg(adapter);
3345                         break;
3346                 default:
3347                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3348                 }
3349                 return;
3350         case IBMVNIC_CRQ_XPORT_EVENT:
3351                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3352                         dev_info(dev, "Re-enabling adapter\n");
3353                         adapter->migrated = true;
3354                         schedule_work(&adapter->ibmvnic_xport);
3355                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3356                         dev_info(dev, "Backing device failover detected\n");
3357                         netif_carrier_off(netdev);
3358                         adapter->failover = true;
3359                 } else {
3360                         /* The adapter lost the connection */
3361                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3362                                 gen_crq->cmd);
3363                         schedule_work(&adapter->ibmvnic_xport);
3364                 }
3365                 return;
3366         case IBMVNIC_CRQ_CMD_RSP:
3367                 break;
3368         default:
3369                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3370                         gen_crq->first);
3371                 return;
3372         }
3373
3374         switch (gen_crq->cmd) {
3375         case VERSION_EXCHANGE_RSP:
3376                 rc = crq->version_exchange_rsp.rc.code;
3377                 if (rc) {
3378                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3379                         break;
3380                 }
3381                 ibmvnic_version =
3382                             be16_to_cpu(crq->version_exchange_rsp.version);
3383                 dev_info(dev, "Partner protocol version is %d\n",
3384                          ibmvnic_version);
3385                 send_cap_queries(adapter);
3386                 break;
3387         case QUERY_CAPABILITY_RSP:
3388                 handle_query_cap_rsp(crq, adapter);
3389                 break;
3390         case QUERY_MAP_RSP:
3391                 handle_query_map_rsp(crq, adapter);
3392                 break;
3393         case REQUEST_MAP_RSP:
3394                 handle_request_map_rsp(crq, adapter);
3395                 break;
3396         case REQUEST_UNMAP_RSP:
3397                 handle_request_unmap_rsp(crq, adapter);
3398                 break;
3399         case REQUEST_CAPABILITY_RSP:
3400                 handle_request_cap_rsp(crq, adapter);
3401                 break;
3402         case LOGIN_RSP:
3403                 netdev_dbg(netdev, "Got Login Response\n");
3404                 handle_login_rsp(crq, adapter);
3405                 break;
3406         case LOGICAL_LINK_STATE_RSP:
3407                 netdev_dbg(netdev, "Got Logical Link State Response\n");
3408                 adapter->logical_link_state =
3409                     crq->logical_link_state_rsp.link_state;
3410                 break;
3411         case LINK_STATE_INDICATION:
3412                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3413                 adapter->phys_link_state =
3414                     crq->link_state_indication.phys_link_state;
3415                 adapter->logical_link_state =
3416                     crq->link_state_indication.logical_link_state;
3417                 break;
3418         case CHANGE_MAC_ADDR_RSP:
3419                 netdev_dbg(netdev, "Got MAC address change Response\n");
3420                 handle_change_mac_rsp(crq, adapter);
3421                 break;
3422         case ERROR_INDICATION:
3423                 netdev_dbg(netdev, "Got Error Indication\n");
3424                 handle_error_indication(crq, adapter);
3425                 break;
3426         case REQUEST_ERROR_RSP:
3427                 netdev_dbg(netdev, "Got Error Detail Response\n");
3428                 handle_error_info_rsp(crq, adapter);
3429                 break;
3430         case REQUEST_STATISTICS_RSP:
3431                 netdev_dbg(netdev, "Got Statistics Response\n");
3432                 complete(&adapter->stats_done);
3433                 break;
3434         case REQUEST_DUMP_SIZE_RSP:
3435                 netdev_dbg(netdev, "Got Request Dump Size Response\n");
3436                 handle_dump_size_rsp(crq, adapter);
3437                 break;
3438         case REQUEST_DUMP_RSP:
3439                 netdev_dbg(netdev, "Got Request Dump Response\n");
3440                 complete(&adapter->fw_done);
3441                 break;
3442         case QUERY_IP_OFFLOAD_RSP:
3443                 netdev_dbg(netdev, "Got Query IP offload Response\n");
3444                 handle_query_ip_offload_rsp(adapter);
3445                 break;
3446         case MULTICAST_CTRL_RSP:
3447                 netdev_dbg(netdev, "Got multicast control Response\n");
3448                 break;
3449         case CONTROL_IP_OFFLOAD_RSP:
3450                 netdev_dbg(netdev, "Got Control IP offload Response\n");
3451                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3452                                  sizeof(adapter->ip_offload_ctrl),
3453                                  DMA_TO_DEVICE);
3454                 /* We're done with the queries, perform the login */
3455                 send_login(adapter);
3456                 break;
3457         case REQUEST_RAS_COMP_NUM_RSP:
3458                 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n");
3459                 if (crq->request_ras_comp_num_rsp.rc.code == 10) {
3460                         netdev_dbg(netdev, "Request RAS Comp Num not supported\n");
3461                         break;
3462                 }
3463                 adapter->ras_comp_num =
3464                     be32_to_cpu(crq->request_ras_comp_num_rsp.num_components);
3465                 handle_request_ras_comp_num_rsp(crq, adapter);
3466                 break;
3467         case REQUEST_RAS_COMPS_RSP:
3468                 netdev_dbg(netdev, "Got Request RAS Comps Response\n");
3469                 handle_request_ras_comps_rsp(crq, adapter);
3470                 break;
3471         case CONTROL_RAS_RSP:
3472                 netdev_dbg(netdev, "Got Control RAS Response\n");
3473                 handle_control_ras_rsp(crq, adapter);
3474                 break;
3475         case COLLECT_FW_TRACE_RSP:
3476                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3477                 complete(&adapter->fw_done);
3478                 break;
3479         default:
3480                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3481                            gen_crq->cmd);
3482         }
3483 }
3484
3485 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3486 {
3487         struct ibmvnic_adapter *adapter = instance;
3488         struct ibmvnic_crq_queue *queue = &adapter->crq;
3489         struct vio_dev *vdev = adapter->vdev;
3490         union ibmvnic_crq *crq;
3491         unsigned long flags;
3492         bool done = false;
3493
3494         spin_lock_irqsave(&queue->lock, flags);
3495         vio_disable_interrupts(vdev);
3496         while (!done) {
3497                 /* Pull all the valid messages off the CRQ */
3498                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3499                         /* This barrier makes sure ibmvnic_next_crq()'s
3500                          * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded
3501                          * before ibmvnic_handle_crq()'s
3502                          * switch(gen_crq->first) and switch(gen_crq->cmd).
3503                          */
3504                         dma_rmb();
3505                         ibmvnic_handle_crq(crq, adapter);
3506                         crq->generic.first = 0;
3507                 }
3508                 vio_enable_interrupts(vdev);
3509                 crq = ibmvnic_next_crq(adapter);
3510                 if (crq) {
3511                         vio_disable_interrupts(vdev);
3512                         ibmvnic_handle_crq(crq, adapter);
3513                         crq->generic.first = 0;
3514                 } else {
3515                         done = true;
3516                 }
3517         }
3518         spin_unlock_irqrestore(&queue->lock, flags);
3519         return IRQ_HANDLED;
3520 }
3521
3522 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3523 {
3524         struct vio_dev *vdev = adapter->vdev;
3525         int rc;
3526
3527         do {
3528                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3529         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3530
3531         if (rc)
3532                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3533
3534         return rc;
3535 }
3536
3537 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3538 {
3539         struct ibmvnic_crq_queue *crq = &adapter->crq;
3540         struct device *dev = &adapter->vdev->dev;
3541         struct vio_dev *vdev = adapter->vdev;
3542         int rc;
3543
3544         /* Close the CRQ */
3545         do {
3546                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3547         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3548
3549         /* Clean out the queue */
3550         if (!crq->msgs)
3551                 return -EINVAL;
3552
3553         memset(crq->msgs, 0, PAGE_SIZE);
3554         crq->cur = 0;
3555
3556         /* And re-open it again */
3557         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3558                                 crq->msg_token, PAGE_SIZE);
3559
3560         if (rc == H_CLOSED)
3561                 /* Adapter is good, but other end is not ready */
3562                 dev_warn(dev, "Partner adapter not ready\n");
3563         else if (rc != 0)
3564                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3565
3566         return rc;
3567 }
3568
3569 static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter)
3570 {
3571         struct ibmvnic_crq_queue *crq = &adapter->crq;
3572         struct vio_dev *vdev = adapter->vdev;
3573         long rc;
3574
3575         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3576         free_irq(vdev->irq, adapter);
3577         do {
3578                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3579         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3580
3581         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3582                          DMA_BIDIRECTIONAL);
3583         free_page((unsigned long)crq->msgs);
3584 }
3585
3586 static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter)
3587 {
3588         struct ibmvnic_crq_queue *crq = &adapter->crq;
3589         struct device *dev = &adapter->vdev->dev;
3590         struct vio_dev *vdev = adapter->vdev;
3591         int rc, retrc = -ENOMEM;
3592
3593         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3594         /* Should we allocate more than one page? */
3595
3596         if (!crq->msgs)
3597                 return -ENOMEM;
3598
3599         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3600         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3601                                         DMA_BIDIRECTIONAL);
3602         if (dma_mapping_error(dev, crq->msg_token))
3603                 goto map_failed;
3604
3605         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3606                                 crq->msg_token, PAGE_SIZE);
3607
3608         if (rc == H_RESOURCE)
3609                 /* maybe kexecing and resource is busy. try a reset */
3610                 rc = ibmvnic_reset_crq(adapter);
3611         retrc = rc;
3612
3613         if (rc == H_CLOSED) {
3614                 dev_warn(dev, "Partner adapter not ready\n");
3615         } else if (rc) {
3616                 dev_warn(dev, "Error %d opening adapter\n", rc);
3617                 goto reg_crq_failed;
3618         }
3619
3620         retrc = 0;
3621
3622         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3623         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3624                          adapter);
3625         if (rc) {
3626                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3627                         vdev->irq, rc);
3628                 goto req_irq_failed;
3629         }
3630
3631         rc = vio_enable_interrupts(vdev);
3632         if (rc) {
3633                 dev_err(dev, "Error %d enabling interrupts\n", rc);
3634                 goto req_irq_failed;
3635         }
3636
3637         crq->cur = 0;
3638         spin_lock_init(&crq->lock);
3639
3640         return retrc;
3641
3642 req_irq_failed:
3643         do {
3644                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3645         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3646 reg_crq_failed:
3647         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3648 map_failed:
3649         free_page((unsigned long)crq->msgs);
3650         return retrc;
3651 }
3652
3653 /* debugfs for dump */
3654 static int ibmvnic_dump_show(struct seq_file *seq, void *v)
3655 {
3656         struct net_device *netdev = seq->private;
3657         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3658         struct device *dev = &adapter->vdev->dev;
3659         union ibmvnic_crq crq;
3660
3661         memset(&crq, 0, sizeof(crq));
3662         crq.request_dump_size.first = IBMVNIC_CRQ_CMD;
3663         crq.request_dump_size.cmd = REQUEST_DUMP_SIZE;
3664
3665         init_completion(&adapter->fw_done);
3666         ibmvnic_send_crq(adapter, &crq);
3667         wait_for_completion(&adapter->fw_done);
3668
3669         seq_write(seq, adapter->dump_data, adapter->dump_data_size);
3670
3671         dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size,
3672                          DMA_BIDIRECTIONAL);
3673
3674         kfree(adapter->dump_data);
3675
3676         return 0;
3677 }
3678
3679 static int ibmvnic_dump_open(struct inode *inode, struct file *file)
3680 {
3681         return single_open(file, ibmvnic_dump_show, inode->i_private);
3682 }
3683
3684 static const struct file_operations ibmvnic_dump_ops = {
3685         .owner          = THIS_MODULE,
3686         .open           = ibmvnic_dump_open,
3687         .read           = seq_read,
3688         .llseek         = seq_lseek,
3689         .release        = single_release,
3690 };
3691
3692 static void handle_crq_init_rsp(struct work_struct *work)
3693 {
3694         struct ibmvnic_adapter *adapter = container_of(work,
3695                                                        struct ibmvnic_adapter,
3696                                                        vnic_crq_init);
3697         struct device *dev = &adapter->vdev->dev;
3698         struct net_device *netdev = adapter->netdev;
3699         unsigned long timeout = msecs_to_jiffies(30000);
3700         bool restart = false;
3701         int rc;
3702
3703         if (adapter->failover) {
3704                 release_sub_crqs(adapter);
3705                 if (netif_running(netdev)) {
3706                         netif_tx_disable(netdev);
3707                         ibmvnic_close(netdev);
3708                         restart = true;
3709                 }
3710         }
3711
3712         reinit_completion(&adapter->init_done);
3713         send_version_xchg(adapter);
3714         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3715                 dev_err(dev, "Passive init timeout\n");
3716                 goto task_failed;
3717         }
3718
3719         do {
3720                 if (adapter->renegotiate) {
3721                         adapter->renegotiate = false;
3722                         release_sub_crqs_no_irqs(adapter);
3723
3724                         reinit_completion(&adapter->init_done);
3725                         send_cap_queries(adapter);
3726                         if (!wait_for_completion_timeout(&adapter->init_done,
3727                                                          timeout)) {
3728                                 dev_err(dev, "Passive init timeout\n");
3729                                 goto task_failed;
3730                         }
3731                 }
3732         } while (adapter->renegotiate);
3733         rc = init_sub_crq_irqs(adapter);
3734
3735         if (rc)
3736                 goto task_failed;
3737
3738         netdev->real_num_tx_queues = adapter->req_tx_queues;
3739         netdev->mtu = adapter->req_mtu;
3740
3741         if (adapter->failover) {
3742                 adapter->failover = false;
3743                 if (restart) {
3744                         rc = ibmvnic_open(netdev);
3745                         if (rc)
3746                                 goto restart_failed;
3747                 }
3748                 netif_carrier_on(netdev);
3749                 return;
3750         }
3751
3752         rc = register_netdev(netdev);
3753         if (rc) {
3754                 dev_err(dev,
3755                         "failed to register netdev rc=%d\n", rc);
3756                 goto register_failed;
3757         }
3758         dev_info(dev, "ibmvnic registered\n");
3759
3760         return;
3761
3762 restart_failed:
3763         dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc);
3764 register_failed:
3765         release_sub_crqs(adapter);
3766 task_failed:
3767         dev_err(dev, "Passive initialization was not successful\n");
3768 }
3769
3770 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3771 {
3772         unsigned long timeout = msecs_to_jiffies(30000);
3773         struct ibmvnic_adapter *adapter;
3774         struct net_device *netdev;
3775         unsigned char *mac_addr_p;
3776         struct dentry *ent;
3777         char buf[17]; /* debugfs name buf */
3778         int rc;
3779
3780         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3781                 dev->unit_address);
3782
3783         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3784                                                         VETH_MAC_ADDR, NULL);
3785         if (!mac_addr_p) {
3786                 dev_err(&dev->dev,
3787                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3788                         __FILE__, __LINE__);
3789                 return 0;
3790         }
3791
3792         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3793                                    IBMVNIC_MAX_TX_QUEUES);
3794         if (!netdev)
3795                 return -ENOMEM;
3796
3797         adapter = netdev_priv(netdev);
3798         dev_set_drvdata(&dev->dev, netdev);
3799         adapter->vdev = dev;
3800         adapter->netdev = netdev;
3801         adapter->failover = false;
3802
3803         ether_addr_copy(adapter->mac_addr, mac_addr_p);
3804         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3805         netdev->irq = dev->irq;
3806         netdev->netdev_ops = &ibmvnic_netdev_ops;
3807         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3808         SET_NETDEV_DEV(netdev, &dev->dev);
3809
3810         INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp);
3811         INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event);
3812
3813         spin_lock_init(&adapter->stats_lock);
3814
3815         rc = ibmvnic_init_crq_queue(adapter);
3816         if (rc) {
3817                 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc);
3818                 goto free_netdev;
3819         }
3820
3821         INIT_LIST_HEAD(&adapter->errors);
3822         INIT_LIST_HEAD(&adapter->inflight);
3823         spin_lock_init(&adapter->error_list_lock);
3824         spin_lock_init(&adapter->inflight_lock);
3825
3826         adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats,
3827                                               sizeof(struct ibmvnic_statistics),
3828                                               DMA_FROM_DEVICE);
3829         if (dma_mapping_error(&dev->dev, adapter->stats_token)) {
3830                 if (!firmware_has_feature(FW_FEATURE_CMO))
3831                         dev_err(&dev->dev, "Couldn't map stats buffer\n");
3832                 rc = -ENOMEM;
3833                 goto free_crq;
3834         }
3835
3836         snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address);
3837         ent = debugfs_create_dir(buf, NULL);
3838         if (!ent || IS_ERR(ent)) {
3839                 dev_info(&dev->dev, "debugfs create directory failed\n");
3840                 adapter->debugfs_dir = NULL;
3841         } else {
3842                 adapter->debugfs_dir = ent;
3843                 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir,
3844                                           netdev, &ibmvnic_dump_ops);
3845                 if (!ent || IS_ERR(ent)) {
3846                         dev_info(&dev->dev,
3847                                  "debugfs create dump file failed\n");
3848                         adapter->debugfs_dump = NULL;
3849                 } else {
3850                         adapter->debugfs_dump = ent;
3851                 }
3852         }
3853
3854         init_completion(&adapter->init_done);
3855         ibmvnic_send_crq_init(adapter);
3856         if (!wait_for_completion_timeout(&adapter->init_done, timeout))
3857                 return 0;
3858
3859         do {
3860                 if (adapter->renegotiate) {
3861                         adapter->renegotiate = false;
3862                         release_sub_crqs_no_irqs(adapter);
3863
3864                         reinit_completion(&adapter->init_done);
3865                         send_cap_queries(adapter);
3866                         if (!wait_for_completion_timeout(&adapter->init_done,
3867                                                          timeout))
3868                                 return 0;
3869                 }
3870         } while (adapter->renegotiate);
3871
3872         rc = init_sub_crq_irqs(adapter);
3873         if (rc) {
3874                 dev_err(&dev->dev, "failed to initialize sub crq irqs\n");
3875                 goto free_debugfs;
3876         }
3877
3878         netdev->real_num_tx_queues = adapter->req_tx_queues;
3879         netdev->mtu = adapter->req_mtu;
3880
3881         rc = register_netdev(netdev);
3882         if (rc) {
3883                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3884                 goto free_sub_crqs;
3885         }
3886         dev_info(&dev->dev, "ibmvnic registered\n");
3887
3888         return 0;
3889
3890 free_sub_crqs:
3891         release_sub_crqs(adapter);
3892 free_debugfs:
3893         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3894                 debugfs_remove_recursive(adapter->debugfs_dir);
3895 free_crq:
3896         ibmvnic_release_crq_queue(adapter);
3897 free_netdev:
3898         free_netdev(netdev);
3899         return rc;
3900 }
3901
3902 static int ibmvnic_remove(struct vio_dev *dev)
3903 {
3904         struct net_device *netdev = dev_get_drvdata(&dev->dev);
3905         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3906
3907         unregister_netdev(netdev);
3908
3909         release_sub_crqs(adapter);
3910
3911         ibmvnic_release_crq_queue(adapter);
3912
3913         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3914                 debugfs_remove_recursive(adapter->debugfs_dir);
3915
3916         dma_unmap_single(&dev->dev, adapter->stats_token,
3917                          sizeof(struct ibmvnic_statistics), DMA_FROM_DEVICE);
3918
3919         if (adapter->ras_comps)
3920                 dma_free_coherent(&dev->dev,
3921                                   adapter->ras_comp_num *
3922                                   sizeof(struct ibmvnic_fw_component),
3923                                   adapter->ras_comps, adapter->ras_comps_tok);
3924
3925         kfree(adapter->ras_comp_int);
3926
3927         free_netdev(netdev);
3928         dev_set_drvdata(&dev->dev, NULL);
3929
3930         return 0;
3931 }
3932
3933 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3934 {
3935         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3936         struct ibmvnic_adapter *adapter;
3937         struct iommu_table *tbl;
3938         unsigned long ret = 0;
3939         int i;
3940
3941         tbl = get_iommu_table_base(&vdev->dev);
3942
3943         /* netdev inits at probe time along with the structures we need below*/
3944         if (!netdev)
3945                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3946
3947         adapter = netdev_priv(netdev);
3948
3949         ret += PAGE_SIZE; /* the crq message queue */
3950         ret += adapter->bounce_buffer_size;
3951         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3952
3953         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3954                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3955
3956         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3957              i++)
3958                 ret += adapter->rx_pool[i].size *
3959                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3960
3961         return ret;
3962 }
3963
3964 static int ibmvnic_resume(struct device *dev)
3965 {
3966         struct net_device *netdev = dev_get_drvdata(dev);
3967         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3968         int i;
3969
3970         /* kick the interrupt handlers just in case we lost an interrupt */
3971         for (i = 0; i < adapter->req_rx_queues; i++)
3972                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3973                                      adapter->rx_scrq[i]);
3974
3975         return 0;
3976 }
3977
3978 static struct vio_device_id ibmvnic_device_table[] = {
3979         {"network", "IBM,vnic"},
3980         {"", "" }
3981 };
3982 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3983
3984 static const struct dev_pm_ops ibmvnic_pm_ops = {
3985         .resume = ibmvnic_resume
3986 };
3987
3988 static struct vio_driver ibmvnic_driver = {
3989         .id_table       = ibmvnic_device_table,
3990         .probe          = ibmvnic_probe,
3991         .remove         = ibmvnic_remove,
3992         .get_desired_dma = ibmvnic_get_desired_dma,
3993         .name           = ibmvnic_driver_name,
3994         .pm             = &ibmvnic_pm_ops,
3995 };
3996
3997 /* module functions */
3998 static int __init ibmvnic_module_init(void)
3999 {
4000         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4001                 IBMVNIC_DRIVER_VERSION);
4002
4003         return vio_register_driver(&ibmvnic_driver);
4004 }
4005
4006 static void __exit ibmvnic_module_exit(void)
4007 {
4008         vio_unregister_driver(&ibmvnic_driver);
4009 }
4010
4011 module_init(ibmvnic_module_init);
4012 module_exit(ibmvnic_module_exit);