drivers/net/ethernet/ibm/ibmvnic.c

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