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/if_arp.h>
  63 #include <linux/in.h>
  64 #include <linux/ip.h>
  65 #include <linux/ipv6.h>
  66 #include <linux/irq.h>
  67 #include <linux/kthread.h>
  68 #include <linux/seq_file.h>
  69 #include <linux/interrupt.h>
  70 #include <net/net_namespace.h>
  71 #include <asm/hvcall.h>
  72 #include <linux/atomic.h>
  73 #include <asm/vio.h>
  74 #include <asm/iommu.h>
  75 #include <linux/uaccess.h>
  76 #include <asm/firmware.h>
  77 #include <linux/workqueue.h>
  78 #include <linux/if_vlan.h>
  79 #include <linux/utsname.h>
  80
  81 #include "ibmvnic.h"
  82
  83 static const char ibmvnic_driver_name[] = "ibmvnic";
  84 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  85
  86 MODULE_AUTHOR("Santiago Leon");
  87 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  88 MODULE_LICENSE("GPL");
  89 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  90
  91 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  92 static int ibmvnic_remove(struct vio_dev *);
  93 static void release_sub_crqs(struct ibmvnic_adapter *, bool);
  94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  99                        union sub_crq *sub_crq);
 100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
 101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
 102 static int enable_scrq_irq(struct ibmvnic_adapter *,
 103                            struct ibmvnic_sub_crq_queue *);
 104 static int disable_scrq_irq(struct ibmvnic_adapter *,
 105                             struct ibmvnic_sub_crq_queue *);
 106 static int pending_scrq(struct ibmvnic_adapter *,
 107                         struct ibmvnic_sub_crq_queue *);
 108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
 109                                         struct ibmvnic_sub_crq_queue *);
 110 static int ibmvnic_poll(struct napi_struct *napi, int data);
 111 static void send_map_query(struct ibmvnic_adapter *adapter);
 112 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 113 static int send_request_unmap(struct ibmvnic_adapter *, u8);
 114 static int send_login(struct ibmvnic_adapter *adapter);
 115 static void send_cap_queries(struct ibmvnic_adapter *adapter);
 116 static int init_sub_crqs(struct ibmvnic_adapter *);
 117 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
 118 static int ibmvnic_init(struct ibmvnic_adapter *);
 119 static int ibmvnic_reset_init(struct ibmvnic_adapter *);
 120 static void release_crq_queue(struct ibmvnic_adapter *);
 121 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
 122 static int init_crq_queue(struct ibmvnic_adapter *adapter);
 123
 124 struct ibmvnic_stat {
 125         char name[ETH_GSTRING_LEN];
 126         int offset;
 127 };
 128
 129 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 130                              offsetof(struct ibmvnic_statistics, stat))
 131 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 132
 133 static const struct ibmvnic_stat ibmvnic_stats[] = {
 134         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 135         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 136         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 137         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 138         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 139         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 140         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 141         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 142         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 143         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 144         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 145         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 146         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 147         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 148         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 149         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 150         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 151         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 152         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 153         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 154         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 155         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 156 };
 157
 158 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 159                           unsigned long length, unsigned long *number,
 160                           unsigned long *irq)
 161 {
 162         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 163         long rc;
 164
 165         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 166         *number = retbuf[0];
 167         *irq = retbuf[1];
 168
 169         return rc;
 170 }
 171
 172 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 173                                 struct ibmvnic_long_term_buff *ltb, int size)
 174 {
 175         struct device *dev = &adapter->vdev->dev;
 176         int rc;
 177
 178         ltb->size = size;
 179         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 180                                        GFP_KERNEL);
 181
 182         if (!ltb->buff) {
 183                 dev_err(dev, "Couldn't alloc long term buffer\n");
 184                 return -ENOMEM;
 185         }
 186         ltb->map_id = adapter->map_id;
 187         adapter->map_id++;
 188
 189         init_completion(&adapter->fw_done);
 190         rc = send_request_map(adapter, ltb->addr,
 191                               ltb->size, ltb->map_id);
 192         if (rc) {
 193                 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 194                 return rc;
 195         }
 196         wait_for_completion(&adapter->fw_done);
 197
 198         if (adapter->fw_done_rc) {
 199                 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
 200                         adapter->fw_done_rc);
 201                 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 202                 return -1;
 203         }
 204         return 0;
 205 }
 206
 207 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 208                                 struct ibmvnic_long_term_buff *ltb)
 209 {
 210         struct device *dev = &adapter->vdev->dev;
 211
 212         if (!ltb->buff)
 213                 return;
 214
 215         if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
 216             adapter->reset_reason != VNIC_RESET_MOBILITY)
 217                 send_request_unmap(adapter, ltb->map_id);
 218         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 219 }
 220
 221 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
 222                                 struct ibmvnic_long_term_buff *ltb)
 223 {
 224         int rc;
 225
 226         memset(ltb->buff, 0, ltb->size);
 227
 228         init_completion(&adapter->fw_done);
 229         rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
 230         if (rc)
 231                 return rc;
 232         wait_for_completion(&adapter->fw_done);
 233
 234         if (adapter->fw_done_rc) {
 235                 dev_info(&adapter->vdev->dev,
 236                          "Reset failed, attempting to free and reallocate buffer\n");
 237                 free_long_term_buff(adapter, ltb);
 238                 return alloc_long_term_buff(adapter, ltb, ltb->size);
 239         }
 240         return 0;
 241 }
 242
 243 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
 244 {
 245         int i;
 246
 247         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 248              i++)
 249                 adapter->rx_pool[i].active = 0;
 250 }
 251
 252 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 253                               struct ibmvnic_rx_pool *pool)
 254 {
 255         int count = pool->size - atomic_read(&pool->available);
 256         struct device *dev = &adapter->vdev->dev;
 257         int buffers_added = 0;
 258         unsigned long lpar_rc;
 259         union sub_crq sub_crq;
 260         struct sk_buff *skb;
 261         unsigned int offset;
 262         dma_addr_t dma_addr;
 263         unsigned char *dst;
 264         u64 *handle_array;
 265         int shift = 0;
 266         int index;
 267         int i;
 268
 269         if (!pool->active)
 270                 return;
 271
 272         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 273                                       be32_to_cpu(adapter->login_rsp_buf->
 274                                       off_rxadd_subcrqs));
 275
 276         for (i = 0; i < count; ++i) {
 277                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 278                 if (!skb) {
 279                         dev_err(dev, "Couldn't replenish rx buff\n");
 280                         adapter->replenish_no_mem++;
 281                         break;
 282                 }
 283
 284                 index = pool->free_map[pool->next_free];
 285
 286                 if (pool->rx_buff[index].skb)
 287                         dev_err(dev, "Inconsistent free_map!\n");
 288
 289                 /* Copy the skb to the long term mapped DMA buffer */
 290                 offset = index * pool->buff_size;
 291                 dst = pool->long_term_buff.buff + offset;
 292                 memset(dst, 0, pool->buff_size);
 293                 dma_addr = pool->long_term_buff.addr + offset;
 294                 pool->rx_buff[index].data = dst;
 295
 296                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 297                 pool->rx_buff[index].dma = dma_addr;
 298                 pool->rx_buff[index].skb = skb;
 299                 pool->rx_buff[index].pool_index = pool->index;
 300                 pool->rx_buff[index].size = pool->buff_size;
 301
 302                 memset(&sub_crq, 0, sizeof(sub_crq));
 303                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 304                 sub_crq.rx_add.correlator =
 305                     cpu_to_be64((u64)&pool->rx_buff[index]);
 306                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 307                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 308
 309                 /* The length field of the sCRQ is defined to be 24 bits so the
 310                  * buffer size needs to be left shifted by a byte before it is
 311                  * converted to big endian to prevent the last byte from being
 312                  * truncated.
 313                  */
 314 #ifdef __LITTLE_ENDIAN__
 315                 shift = 8;
 316 #endif
 317                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 318
 319                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 320                                       &sub_crq);
 321                 if (lpar_rc != H_SUCCESS)
 322                         goto failure;
 323
 324                 buffers_added++;
 325                 adapter->replenish_add_buff_success++;
 326                 pool->next_free = (pool->next_free + 1) % pool->size;
 327         }
 328         atomic_add(buffers_added, &pool->available);
 329         return;
 330
 331 failure:
 332         if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
 333                 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
 334         pool->free_map[pool->next_free] = index;
 335         pool->rx_buff[index].skb = NULL;
 336
 337         dev_kfree_skb_any(skb);
 338         adapter->replenish_add_buff_failure++;
 339         atomic_add(buffers_added, &pool->available);
 340
 341         if (lpar_rc == H_CLOSED || adapter->failover_pending) {
 342                 /* Disable buffer pool replenishment and report carrier off if
 343                  * queue is closed or pending failover.
 344                  * Firmware guarantees that a signal will be sent to the
 345                  * driver, triggering a reset.
 346                  */
 347                 deactivate_rx_pools(adapter);
 348                 netif_carrier_off(adapter->netdev);
 349         }
 350 }
 351
 352 static void replenish_pools(struct ibmvnic_adapter *adapter)
 353 {
 354         int i;
 355
 356         adapter->replenish_task_cycles++;
 357         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 358              i++) {
 359                 if (adapter->rx_pool[i].active)
 360                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 361         }
 362 }
 363
 364 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
 365 {
 366         kfree(adapter->tx_stats_buffers);
 367         kfree(adapter->rx_stats_buffers);
 368         adapter->tx_stats_buffers = NULL;
 369         adapter->rx_stats_buffers = NULL;
 370 }
 371
 372 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
 373 {
 374         adapter->tx_stats_buffers =
 375                                 kcalloc(IBMVNIC_MAX_QUEUES,
 376                                         sizeof(struct ibmvnic_tx_queue_stats),
 377                                         GFP_KERNEL);
 378         if (!adapter->tx_stats_buffers)
 379                 return -ENOMEM;
 380
 381         adapter->rx_stats_buffers =
 382                                 kcalloc(IBMVNIC_MAX_QUEUES,
 383                                         sizeof(struct ibmvnic_rx_queue_stats),
 384                                         GFP_KERNEL);
 385         if (!adapter->rx_stats_buffers)
 386                 return -ENOMEM;
 387
 388         return 0;
 389 }
 390
 391 static void release_stats_token(struct ibmvnic_adapter *adapter)
 392 {
 393         struct device *dev = &adapter->vdev->dev;
 394
 395         if (!adapter->stats_token)
 396                 return;
 397
 398         dma_unmap_single(dev, adapter->stats_token,
 399                          sizeof(struct ibmvnic_statistics),
 400                          DMA_FROM_DEVICE);
 401         adapter->stats_token = 0;
 402 }
 403
 404 static int init_stats_token(struct ibmvnic_adapter *adapter)
 405 {
 406         struct device *dev = &adapter->vdev->dev;
 407         dma_addr_t stok;
 408
 409         stok = dma_map_single(dev, &adapter->stats,
 410                               sizeof(struct ibmvnic_statistics),
 411                               DMA_FROM_DEVICE);
 412         if (dma_mapping_error(dev, stok)) {
 413                 dev_err(dev, "Couldn't map stats buffer\n");
 414                 return -1;
 415         }
 416
 417         adapter->stats_token = stok;
 418         netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
 419         return 0;
 420 }
 421
 422 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
 423 {
 424         struct ibmvnic_rx_pool *rx_pool;
 425         int rx_scrqs;
 426         int i, j, rc;
 427         u64 *size_array;
 428
 429         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 430                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 431
 432         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 433         for (i = 0; i < rx_scrqs; i++) {
 434                 rx_pool = &adapter->rx_pool[i];
 435
 436                 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
 437
 438                 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
 439                         free_long_term_buff(adapter, &rx_pool->long_term_buff);
 440                         rx_pool->buff_size = be64_to_cpu(size_array[i]);
 441                         alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 442                                              rx_pool->size *
 443                                              rx_pool->buff_size);
 444                 } else {
 445                         rc = reset_long_term_buff(adapter,
 446                                                   &rx_pool->long_term_buff);
 447                 }
 448
 449                 if (rc)
 450                         return rc;
 451
 452                 for (j = 0; j < rx_pool->size; j++)
 453                         rx_pool->free_map[j] = j;
 454
 455                 memset(rx_pool->rx_buff, 0,
 456                        rx_pool->size * sizeof(struct ibmvnic_rx_buff));
 457
 458                 atomic_set(&rx_pool->available, 0);
 459                 rx_pool->next_alloc = 0;
 460                 rx_pool->next_free = 0;
 461                 rx_pool->active = 1;
 462         }
 463
 464         return 0;
 465 }
 466
 467 static void release_rx_pools(struct ibmvnic_adapter *adapter)
 468 {
 469         struct ibmvnic_rx_pool *rx_pool;
 470         int i, j;
 471
 472         if (!adapter->rx_pool)
 473                 return;
 474
 475         for (i = 0; i < adapter->num_active_rx_pools; i++) {
 476                 rx_pool = &adapter->rx_pool[i];
 477
 478                 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
 479
 480                 kfree(rx_pool->free_map);
 481                 free_long_term_buff(adapter, &rx_pool->long_term_buff);
 482
 483                 if (!rx_pool->rx_buff)
 484                         continue;
 485
 486                 for (j = 0; j < rx_pool->size; j++) {
 487                         if (rx_pool->rx_buff[j].skb) {
 488                                 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
 489                                 rx_pool->rx_buff[j].skb = NULL;
 490                         }
 491                 }
 492
 493                 kfree(rx_pool->rx_buff);
 494         }
 495
 496         kfree(adapter->rx_pool);
 497         adapter->rx_pool = NULL;
 498         adapter->num_active_rx_pools = 0;
 499 }
 500
 501 static int init_rx_pools(struct net_device *netdev)
 502 {
 503         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 504         struct device *dev = &adapter->vdev->dev;
 505         struct ibmvnic_rx_pool *rx_pool;
 506         int rxadd_subcrqs;
 507         u64 *size_array;
 508         int i, j;
 509
 510         rxadd_subcrqs =
 511                 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 512         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 513                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 514
 515         adapter->rx_pool = kcalloc(rxadd_subcrqs,
 516                                    sizeof(struct ibmvnic_rx_pool),
 517                                    GFP_KERNEL);
 518         if (!adapter->rx_pool) {
 519                 dev_err(dev, "Failed to allocate rx pools\n");
 520                 return -1;
 521         }
 522
 523         adapter->num_active_rx_pools = rxadd_subcrqs;
 524
 525         for (i = 0; i < rxadd_subcrqs; i++) {
 526                 rx_pool = &adapter->rx_pool[i];
 527
 528                 netdev_dbg(adapter->netdev,
 529                            "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
 530                            i, adapter->req_rx_add_entries_per_subcrq,
 531                            be64_to_cpu(size_array[i]));
 532
 533                 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
 534                 rx_pool->index = i;
 535                 rx_pool->buff_size = be64_to_cpu(size_array[i]);
 536                 rx_pool->active = 1;
 537
 538                 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
 539                                             GFP_KERNEL);
 540                 if (!rx_pool->free_map) {
 541                         release_rx_pools(adapter);
 542                         return -1;
 543                 }
 544
 545                 rx_pool->rx_buff = kcalloc(rx_pool->size,
 546                                            sizeof(struct ibmvnic_rx_buff),
 547                                            GFP_KERNEL);
 548                 if (!rx_pool->rx_buff) {
 549                         dev_err(dev, "Couldn't alloc rx buffers\n");
 550                         release_rx_pools(adapter);
 551                         return -1;
 552                 }
 553
 554                 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 555                                          rx_pool->size * rx_pool->buff_size)) {
 556                         release_rx_pools(adapter);
 557                         return -1;
 558                 }
 559
 560                 for (j = 0; j < rx_pool->size; ++j)
 561                         rx_pool->free_map[j] = j;
 562
 563                 atomic_set(&rx_pool->available, 0);
 564                 rx_pool->next_alloc = 0;
 565                 rx_pool->next_free = 0;
 566         }
 567
 568         return 0;
 569 }
 570
 571 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
 572                              struct ibmvnic_tx_pool *tx_pool)
 573 {
 574         int rc, i;
 575
 576         rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
 577         if (rc)
 578                 return rc;
 579
 580         memset(tx_pool->tx_buff, 0,
 581                tx_pool->num_buffers *
 582                sizeof(struct ibmvnic_tx_buff));
 583
 584         for (i = 0; i < tx_pool->num_buffers; i++)
 585                 tx_pool->free_map[i] = i;
 586
 587         tx_pool->consumer_index = 0;
 588         tx_pool->producer_index = 0;
 589
 590         return 0;
 591 }
 592
 593 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
 594 {
 595         int tx_scrqs;
 596         int i, rc;
 597
 598         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 599         for (i = 0; i < tx_scrqs; i++) {
 600                 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
 601                 if (rc)
 602                         return rc;
 603                 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
 604                 if (rc)
 605                         return rc;
 606         }
 607
 608         return 0;
 609 }
 610
 611 static void release_vpd_data(struct ibmvnic_adapter *adapter)
 612 {
 613         if (!adapter->vpd)
 614                 return;
 615
 616         kfree(adapter->vpd->buff);
 617         kfree(adapter->vpd);
 618
 619         adapter->vpd = NULL;
 620 }
 621
 622 static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
 623                                 struct ibmvnic_tx_pool *tx_pool)
 624 {
 625         kfree(tx_pool->tx_buff);
 626         kfree(tx_pool->free_map);
 627         free_long_term_buff(adapter, &tx_pool->long_term_buff);
 628 }
 629
 630 static void release_tx_pools(struct ibmvnic_adapter *adapter)
 631 {
 632         int i;
 633
 634         if (!adapter->tx_pool)
 635                 return;
 636
 637         for (i = 0; i < adapter->num_active_tx_pools; i++) {
 638                 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
 639                 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
 640         }
 641
 642         kfree(adapter->tx_pool);
 643         adapter->tx_pool = NULL;
 644         kfree(adapter->tso_pool);
 645         adapter->tso_pool = NULL;
 646         adapter->num_active_tx_pools = 0;
 647 }
 648
 649 static int init_one_tx_pool(struct net_device *netdev,
 650                             struct ibmvnic_tx_pool *tx_pool,
 651                             int num_entries, int buf_size)
 652 {
 653         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 654         int i;
 655
 656         tx_pool->tx_buff = kcalloc(num_entries,
 657                                    sizeof(struct ibmvnic_tx_buff),
 658                                    GFP_KERNEL);
 659         if (!tx_pool->tx_buff)
 660                 return -1;
 661
 662         if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 663                                  num_entries * buf_size))
 664                 return -1;
 665
 666         tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
 667         if (!tx_pool->free_map)
 668                 return -1;
 669
 670         for (i = 0; i < num_entries; i++)
 671                 tx_pool->free_map[i] = i;
 672
 673         tx_pool->consumer_index = 0;
 674         tx_pool->producer_index = 0;
 675         tx_pool->num_buffers = num_entries;
 676         tx_pool->buf_size = buf_size;
 677
 678         return 0;
 679 }
 680
 681 static int init_tx_pools(struct net_device *netdev)
 682 {
 683         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 684         int tx_subcrqs;
 685         int i, rc;
 686
 687         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 688         adapter->tx_pool = kcalloc(tx_subcrqs,
 689                                    sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 690         if (!adapter->tx_pool)
 691                 return -1;
 692
 693         adapter->tso_pool = kcalloc(tx_subcrqs,
 694                                     sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 695         if (!adapter->tso_pool)
 696                 return -1;
 697
 698         adapter->num_active_tx_pools = tx_subcrqs;
 699
 700         for (i = 0; i < tx_subcrqs; i++) {
 701                 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
 702                                       adapter->req_tx_entries_per_subcrq,
 703                                       adapter->req_mtu + VLAN_HLEN);
 704                 if (rc) {
 705                         release_tx_pools(adapter);
 706                         return rc;
 707                 }
 708
 709                 init_one_tx_pool(netdev, &adapter->tso_pool[i],
 710                                  IBMVNIC_TSO_BUFS,
 711                                  IBMVNIC_TSO_BUF_SZ);
 712                 if (rc) {
 713                         release_tx_pools(adapter);
 714                         return rc;
 715                 }
 716         }
 717
 718         return 0;
 719 }
 720
 721 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
 722 {
 723         int i;
 724
 725         if (adapter->napi_enabled)
 726                 return;
 727
 728         for (i = 0; i < adapter->req_rx_queues; i++)
 729                 napi_enable(&adapter->napi[i]);
 730
 731         adapter->napi_enabled = true;
 732 }
 733
 734 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
 735 {
 736         int i;
 737
 738         if (!adapter->napi_enabled)
 739                 return;
 740
 741         for (i = 0; i < adapter->req_rx_queues; i++) {
 742                 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
 743                 napi_disable(&adapter->napi[i]);
 744         }
 745
 746         adapter->napi_enabled = false;
 747 }
 748
 749 static int init_napi(struct ibmvnic_adapter *adapter)
 750 {
 751         int i;
 752
 753         adapter->napi = kcalloc(adapter->req_rx_queues,
 754                                 sizeof(struct napi_struct), GFP_KERNEL);
 755         if (!adapter->napi)
 756                 return -ENOMEM;
 757
 758         for (i = 0; i < adapter->req_rx_queues; i++) {
 759                 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
 760                 netif_napi_add(adapter->netdev, &adapter->napi[i],
 761                                ibmvnic_poll, NAPI_POLL_WEIGHT);
 762         }
 763
 764         adapter->num_active_rx_napi = adapter->req_rx_queues;
 765         return 0;
 766 }
 767
 768 static void release_napi(struct ibmvnic_adapter *adapter)
 769 {
 770         int i;
 771
 772         if (!adapter->napi)
 773                 return;
 774
 775         for (i = 0; i < adapter->num_active_rx_napi; i++) {
 776                 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i);
 777                 netif_napi_del(&adapter->napi[i]);
 778         }
 779
 780         kfree(adapter->napi);
 781         adapter->napi = NULL;
 782         adapter->num_active_rx_napi = 0;
 783         adapter->napi_enabled = false;
 784 }
 785
 786 static int ibmvnic_login(struct net_device *netdev)
 787 {
 788         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 789         unsigned long timeout = msecs_to_jiffies(30000);
 790         int retry_count = 0;
 791         bool retry;
 792         int rc;
 793
 794         do {
 795                 retry = false;
 796                 if (retry_count > IBMVNIC_MAX_QUEUES) {
 797                         netdev_warn(netdev, "Login attempts exceeded\n");
 798                         return -1;
 799                 }
 800
 801                 adapter->init_done_rc = 0;
 802                 reinit_completion(&adapter->init_done);
 803                 rc = send_login(adapter);
 804                 if (rc) {
 805                         netdev_warn(netdev, "Unable to login\n");
 806                         return rc;
 807                 }
 808
 809                 if (!wait_for_completion_timeout(&adapter->init_done,
 810                                                  timeout)) {
 811                         netdev_warn(netdev, "Login timed out\n");
 812                         return -1;
 813                 }
 814
 815                 if (adapter->init_done_rc == PARTIALSUCCESS) {
 816                         retry_count++;
 817                         release_sub_crqs(adapter, 1);
 818
 819                         retry = true;
 820                         netdev_dbg(netdev,
 821                                    "Received partial success, retrying...\n");
 822                         adapter->init_done_rc = 0;
 823                         reinit_completion(&adapter->init_done);
 824                         send_cap_queries(adapter);
 825                         if (!wait_for_completion_timeout(&adapter->init_done,
 826                                                          timeout)) {
 827                                 netdev_warn(netdev,
 828                                             "Capabilities query timed out\n");
 829                                 return -1;
 830                         }
 831
 832                         rc = init_sub_crqs(adapter);
 833                         if (rc) {
 834                                 netdev_warn(netdev,
 835                                             "SCRQ initialization failed\n");
 836                                 return -1;
 837                         }
 838
 839                         rc = init_sub_crq_irqs(adapter);
 840                         if (rc) {
 841                                 netdev_warn(netdev,
 842                                             "SCRQ irq initialization failed\n");
 843                                 return -1;
 844                         }
 845                 } else if (adapter->init_done_rc) {
 846                         netdev_warn(netdev, "Adapter login failed\n");
 847                         return -1;
 848                 }
 849         } while (retry);
 850
 851         /* handle pending MAC address changes after successful login */
 852         if (adapter->mac_change_pending) {
 853                 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
 854                 adapter->mac_change_pending = false;
 855         }
 856
 857         return 0;
 858 }
 859
 860 static void release_login_buffer(struct ibmvnic_adapter *adapter)
 861 {
 862         kfree(adapter->login_buf);
 863         adapter->login_buf = NULL;
 864 }
 865
 866 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
 867 {
 868         kfree(adapter->login_rsp_buf);
 869         adapter->login_rsp_buf = NULL;
 870 }
 871
 872 static void release_resources(struct ibmvnic_adapter *adapter)
 873 {
 874         release_vpd_data(adapter);
 875
 876         release_tx_pools(adapter);
 877         release_rx_pools(adapter);
 878
 879         release_napi(adapter);
 880         release_login_rsp_buffer(adapter);
 881 }
 882
 883 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
 884 {
 885         struct net_device *netdev = adapter->netdev;
 886         unsigned long timeout = msecs_to_jiffies(30000);
 887         union ibmvnic_crq crq;
 888         bool resend;
 889         int rc;
 890
 891         netdev_dbg(netdev, "setting link state %d\n", link_state);
 892
 893         memset(&crq, 0, sizeof(crq));
 894         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 895         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 896         crq.logical_link_state.link_state = link_state;
 897
 898         do {
 899                 resend = false;
 900
 901                 reinit_completion(&adapter->init_done);
 902                 rc = ibmvnic_send_crq(adapter, &crq);
 903                 if (rc) {
 904                         netdev_err(netdev, "Failed to set link state\n");
 905                         return rc;
 906                 }
 907
 908                 if (!wait_for_completion_timeout(&adapter->init_done,
 909                                                  timeout)) {
 910                         netdev_err(netdev, "timeout setting link state\n");
 911                         return -1;
 912                 }
 913
 914                 if (adapter->init_done_rc == 1) {
 915                         /* Partuial success, delay and re-send */
 916                         mdelay(1000);
 917                         resend = true;
 918                 } else if (adapter->init_done_rc) {
 919                         netdev_warn(netdev, "Unable to set link state, rc=%d\n",
 920                                     adapter->init_done_rc);
 921                         return adapter->init_done_rc;
 922                 }
 923         } while (resend);
 924
 925         return 0;
 926 }
 927
 928 static int set_real_num_queues(struct net_device *netdev)
 929 {
 930         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 931         int rc;
 932
 933         netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
 934                    adapter->req_tx_queues, adapter->req_rx_queues);
 935
 936         rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
 937         if (rc) {
 938                 netdev_err(netdev, "failed to set the number of tx queues\n");
 939                 return rc;
 940         }
 941
 942         rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
 943         if (rc)
 944                 netdev_err(netdev, "failed to set the number of rx queues\n");
 945
 946         return rc;
 947 }
 948
 949 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
 950 {
 951         struct device *dev = &adapter->vdev->dev;
 952         union ibmvnic_crq crq;
 953         int len = 0;
 954         int rc;
 955
 956         if (adapter->vpd->buff)
 957                 len = adapter->vpd->len;
 958
 959         init_completion(&adapter->fw_done);
 960         crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
 961         crq.get_vpd_size.cmd = GET_VPD_SIZE;
 962         rc = ibmvnic_send_crq(adapter, &crq);
 963         if (rc)
 964                 return rc;
 965         wait_for_completion(&adapter->fw_done);
 966
 967         if (!adapter->vpd->len)
 968                 return -ENODATA;
 969
 970         if (!adapter->vpd->buff)
 971                 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
 972         else if (adapter->vpd->len != len)
 973                 adapter->vpd->buff =
 974                         krealloc(adapter->vpd->buff,
 975                                  adapter->vpd->len, GFP_KERNEL);
 976
 977         if (!adapter->vpd->buff) {
 978                 dev_err(dev, "Could allocate VPD buffer\n");
 979                 return -ENOMEM;
 980         }
 981
 982         adapter->vpd->dma_addr =
 983                 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
 984                                DMA_FROM_DEVICE);
 985         if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
 986                 dev_err(dev, "Could not map VPD buffer\n");
 987                 kfree(adapter->vpd->buff);
 988                 adapter->vpd->buff = NULL;
 989                 return -ENOMEM;
 990         }
 991
 992         reinit_completion(&adapter->fw_done);
 993         crq.get_vpd.first = IBMVNIC_CRQ_CMD;
 994         crq.get_vpd.cmd = GET_VPD;
 995         crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
 996         crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
 997         rc = ibmvnic_send_crq(adapter, &crq);
 998         if (rc) {
 999                 kfree(adapter->vpd->buff);
1000                 adapter->vpd->buff = NULL;
1001                 return rc;
1002         }
1003         wait_for_completion(&adapter->fw_done);
1004
1005         return 0;
1006 }
1007
1008 static int init_resources(struct ibmvnic_adapter *adapter)
1009 {
1010         struct net_device *netdev = adapter->netdev;
1011         int rc;
1012
1013         rc = set_real_num_queues(netdev);
1014         if (rc)
1015                 return rc;
1016
1017         adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1018         if (!adapter->vpd)
1019                 return -ENOMEM;
1020
1021         /* Vital Product Data (VPD) */
1022         rc = ibmvnic_get_vpd(adapter);
1023         if (rc) {
1024                 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1025                 return rc;
1026         }
1027
1028         adapter->map_id = 1;
1029
1030         rc = init_napi(adapter);
1031         if (rc)
1032                 return rc;
1033
1034         send_map_query(adapter);
1035
1036         rc = init_rx_pools(netdev);
1037         if (rc)
1038                 return rc;
1039
1040         rc = init_tx_pools(netdev);
1041         return rc;
1042 }
1043
1044 static int __ibmvnic_open(struct net_device *netdev)
1045 {
1046         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1047         enum vnic_state prev_state = adapter->state;
1048         int i, rc;
1049
1050         adapter->state = VNIC_OPENING;
1051         replenish_pools(adapter);
1052         ibmvnic_napi_enable(adapter);
1053
1054         /* We're ready to receive frames, enable the sub-crq interrupts and
1055          * set the logical link state to up
1056          */
1057         for (i = 0; i < adapter->req_rx_queues; i++) {
1058                 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1059                 if (prev_state == VNIC_CLOSED)
1060                         enable_irq(adapter->rx_scrq[i]->irq);
1061                 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1062         }
1063
1064         for (i = 0; i < adapter->req_tx_queues; i++) {
1065                 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1066                 if (prev_state == VNIC_CLOSED)
1067                         enable_irq(adapter->tx_scrq[i]->irq);
1068                 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1069         }
1070
1071         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1072         if (rc) {
1073                 for (i = 0; i < adapter->req_rx_queues; i++)
1074                         napi_disable(&adapter->napi[i]);
1075                 release_resources(adapter);
1076                 return rc;
1077         }
1078
1079         netif_tx_start_all_queues(netdev);
1080
1081         if (prev_state == VNIC_CLOSED) {
1082                 for (i = 0; i < adapter->req_rx_queues; i++)
1083                         napi_schedule(&adapter->napi[i]);
1084         }
1085
1086         adapter->state = VNIC_OPEN;
1087         return rc;
1088 }
1089
1090 static int ibmvnic_open(struct net_device *netdev)
1091 {
1092         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1093         int rc;
1094
1095         /* If device failover is pending, just set device state and return.
1096          * Device operation will be handled by reset routine.
1097          */
1098         if (adapter->failover_pending) {
1099                 adapter->state = VNIC_OPEN;
1100                 return 0;
1101         }
1102
1103         if (adapter->state != VNIC_CLOSED) {
1104                 rc = ibmvnic_login(netdev);
1105                 if (rc)
1106                         return rc;
1107
1108                 rc = init_resources(adapter);
1109                 if (rc) {
1110                         netdev_err(netdev, "failed to initialize resources\n");
1111                         release_resources(adapter);
1112                         return rc;
1113                 }
1114         }
1115
1116         rc = __ibmvnic_open(netdev);
1117         netif_carrier_on(netdev);
1118
1119         return rc;
1120 }
1121
1122 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1123 {
1124         struct ibmvnic_rx_pool *rx_pool;
1125         struct ibmvnic_rx_buff *rx_buff;
1126         u64 rx_entries;
1127         int rx_scrqs;
1128         int i, j;
1129
1130         if (!adapter->rx_pool)
1131                 return;
1132
1133         rx_scrqs = adapter->num_active_rx_pools;
1134         rx_entries = adapter->req_rx_add_entries_per_subcrq;
1135
1136         /* Free any remaining skbs in the rx buffer pools */
1137         for (i = 0; i < rx_scrqs; i++) {
1138                 rx_pool = &adapter->rx_pool[i];
1139                 if (!rx_pool || !rx_pool->rx_buff)
1140                         continue;
1141
1142                 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1143                 for (j = 0; j < rx_entries; j++) {
1144                         rx_buff = &rx_pool->rx_buff[j];
1145                         if (rx_buff && rx_buff->skb) {
1146                                 dev_kfree_skb_any(rx_buff->skb);
1147                                 rx_buff->skb = NULL;
1148                         }
1149                 }
1150         }
1151 }
1152
1153 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1154                               struct ibmvnic_tx_pool *tx_pool)
1155 {
1156         struct ibmvnic_tx_buff *tx_buff;
1157         u64 tx_entries;
1158         int i;
1159
1160         if (!tx_pool || !tx_pool->tx_buff)
1161                 return;
1162
1163         tx_entries = tx_pool->num_buffers;
1164
1165         for (i = 0; i < tx_entries; i++) {
1166                 tx_buff = &tx_pool->tx_buff[i];
1167                 if (tx_buff && tx_buff->skb) {
1168                         dev_kfree_skb_any(tx_buff->skb);
1169                         tx_buff->skb = NULL;
1170                 }
1171         }
1172 }
1173
1174 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1175 {
1176         int tx_scrqs;
1177         int i;
1178
1179         if (!adapter->tx_pool || !adapter->tso_pool)
1180                 return;
1181
1182         tx_scrqs = adapter->num_active_tx_pools;
1183
1184         /* Free any remaining skbs in the tx buffer pools */
1185         for (i = 0; i < tx_scrqs; i++) {
1186                 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1187                 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1188                 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1189         }
1190 }
1191
1192 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1193 {
1194         struct net_device *netdev = adapter->netdev;
1195         int i;
1196
1197         if (adapter->tx_scrq) {
1198                 for (i = 0; i < adapter->req_tx_queues; i++)
1199                         if (adapter->tx_scrq[i]->irq) {
1200                                 netdev_dbg(netdev,
1201                                            "Disabling tx_scrq[%d] irq\n", i);
1202                                 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1203                                 disable_irq(adapter->tx_scrq[i]->irq);
1204                         }
1205         }
1206
1207         if (adapter->rx_scrq) {
1208                 for (i = 0; i < adapter->req_rx_queues; i++) {
1209                         if (adapter->rx_scrq[i]->irq) {
1210                                 netdev_dbg(netdev,
1211                                            "Disabling rx_scrq[%d] irq\n", i);
1212                                 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1213                                 disable_irq(adapter->rx_scrq[i]->irq);
1214                         }
1215                 }
1216         }
1217 }
1218
1219 static void ibmvnic_cleanup(struct net_device *netdev)
1220 {
1221         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1222
1223         /* ensure that transmissions are stopped if called by do_reset */
1224         if (adapter->resetting)
1225                 netif_tx_disable(netdev);
1226         else
1227                 netif_tx_stop_all_queues(netdev);
1228
1229         ibmvnic_napi_disable(adapter);
1230         ibmvnic_disable_irqs(adapter);
1231
1232         clean_rx_pools(adapter);
1233         clean_tx_pools(adapter);
1234 }
1235
1236 static int __ibmvnic_close(struct net_device *netdev)
1237 {
1238         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1239         int rc = 0;
1240
1241         adapter->state = VNIC_CLOSING;
1242         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1243         if (rc)
1244                 return rc;
1245         adapter->state = VNIC_CLOSED;
1246         return 0;
1247 }
1248
1249 static int ibmvnic_close(struct net_device *netdev)
1250 {
1251         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1252         int rc;
1253
1254         /* If device failover is pending, just set device state and return.
1255          * Device operation will be handled by reset routine.
1256          */
1257         if (adapter->failover_pending) {
1258                 adapter->state = VNIC_CLOSED;
1259                 return 0;
1260         }
1261
1262         rc = __ibmvnic_close(netdev);
1263         ibmvnic_cleanup(netdev);
1264
1265         return rc;
1266 }
1267
1268 /**
1269  * build_hdr_data - creates L2/L3/L4 header data buffer
1270  * @hdr_field - bitfield determining needed headers
1271  * @skb - socket buffer
1272  * @hdr_len - array of header lengths
1273  * @tot_len - total length of data
1274  *
1275  * Reads hdr_field to determine which headers are needed by firmware.
1276  * Builds a buffer containing these headers.  Saves individual header
1277  * lengths and total buffer length to be used to build descriptors.
1278  */
1279 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1280                           int *hdr_len, u8 *hdr_data)
1281 {
1282         int len = 0;
1283         u8 *hdr;
1284
1285         if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1286                 hdr_len[0] = sizeof(struct vlan_ethhdr);
1287         else
1288                 hdr_len[0] = sizeof(struct ethhdr);
1289
1290         if (skb->protocol == htons(ETH_P_IP)) {
1291                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1292                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1293                         hdr_len[2] = tcp_hdrlen(skb);
1294                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1295                         hdr_len[2] = sizeof(struct udphdr);
1296         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1297                 hdr_len[1] = sizeof(struct ipv6hdr);
1298                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1299                         hdr_len[2] = tcp_hdrlen(skb);
1300                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1301                         hdr_len[2] = sizeof(struct udphdr);
1302         } else if (skb->protocol == htons(ETH_P_ARP)) {
1303                 hdr_len[1] = arp_hdr_len(skb->dev);
1304                 hdr_len[2] = 0;
1305         }
1306
1307         memset(hdr_data, 0, 120);
1308         if ((hdr_field >> 6) & 1) {
1309                 hdr = skb_mac_header(skb);
1310                 memcpy(hdr_data, hdr, hdr_len[0]);
1311                 len += hdr_len[0];
1312         }
1313
1314         if ((hdr_field >> 5) & 1) {
1315                 hdr = skb_network_header(skb);
1316                 memcpy(hdr_data + len, hdr, hdr_len[1]);
1317                 len += hdr_len[1];
1318         }
1319
1320         if ((hdr_field >> 4) & 1) {
1321                 hdr = skb_transport_header(skb);
1322                 memcpy(hdr_data + len, hdr, hdr_len[2]);
1323                 len += hdr_len[2];
1324         }
1325         return len;
1326 }
1327
1328 /**
1329  * create_hdr_descs - create header and header extension descriptors
1330  * @hdr_field - bitfield determining needed headers
1331  * @data - buffer containing header data
1332  * @len - length of data buffer
1333  * @hdr_len - array of individual header lengths
1334  * @scrq_arr - descriptor array
1335  *
1336  * Creates header and, if needed, header extension descriptors and
1337  * places them in a descriptor array, scrq_arr
1338  */
1339
1340 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1341                             union sub_crq *scrq_arr)
1342 {
1343         union sub_crq hdr_desc;
1344         int tmp_len = len;
1345         int num_descs = 0;
1346         u8 *data, *cur;
1347         int tmp;
1348
1349         while (tmp_len > 0) {
1350                 cur = hdr_data + len - tmp_len;
1351
1352                 memset(&hdr_desc, 0, sizeof(hdr_desc));
1353                 if (cur != hdr_data) {
1354                         data = hdr_desc.hdr_ext.data;
1355                         tmp = tmp_len > 29 ? 29 : tmp_len;
1356                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1357                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1358                         hdr_desc.hdr_ext.len = tmp;
1359                 } else {
1360                         data = hdr_desc.hdr.data;
1361                         tmp = tmp_len > 24 ? 24 : tmp_len;
1362                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1363                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1364                         hdr_desc.hdr.len = tmp;
1365                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1366                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1367                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1368                         hdr_desc.hdr.flag = hdr_field << 1;
1369                 }
1370                 memcpy(data, cur, tmp);
1371                 tmp_len -= tmp;
1372                 *scrq_arr = hdr_desc;
1373                 scrq_arr++;
1374                 num_descs++;
1375         }
1376
1377         return num_descs;
1378 }
1379
1380 /**
1381  * build_hdr_descs_arr - build a header descriptor array
1382  * @skb - socket buffer
1383  * @num_entries - number of descriptors to be sent
1384  * @subcrq - first TX descriptor
1385  * @hdr_field - bit field determining which headers will be sent
1386  *
1387  * This function will build a TX descriptor array with applicable
1388  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1389  */
1390
1391 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1392                                 int *num_entries, u8 hdr_field)
1393 {
1394         int hdr_len[3] = {0, 0, 0};
1395         int tot_len;
1396         u8 *hdr_data = txbuff->hdr_data;
1397
1398         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1399                                  txbuff->hdr_data);
1400         *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1401                          txbuff->indir_arr + 1);
1402 }
1403
1404 static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1405                                     struct net_device *netdev)
1406 {
1407         /* For some backing devices, mishandling of small packets
1408          * can result in a loss of connection or TX stall. Device
1409          * architects recommend that no packet should be smaller
1410          * than the minimum MTU value provided to the driver, so
1411          * pad any packets to that length
1412          */
1413         if (skb->len < netdev->min_mtu)
1414                 return skb_put_padto(skb, netdev->min_mtu);
1415
1416         return 0;
1417 }
1418
1419 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1420 {
1421         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1422         int queue_num = skb_get_queue_mapping(skb);
1423         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1424         struct device *dev = &adapter->vdev->dev;
1425         struct ibmvnic_tx_buff *tx_buff = NULL;
1426         struct ibmvnic_sub_crq_queue *tx_scrq;
1427         struct ibmvnic_tx_pool *tx_pool;
1428         unsigned int tx_send_failed = 0;
1429         unsigned int tx_map_failed = 0;
1430         unsigned int tx_dropped = 0;
1431         unsigned int tx_packets = 0;
1432         unsigned int tx_bytes = 0;
1433         dma_addr_t data_dma_addr;
1434         struct netdev_queue *txq;
1435         unsigned long lpar_rc;
1436         union sub_crq tx_crq;
1437         unsigned int offset;
1438         int num_entries = 1;
1439         unsigned char *dst;
1440         u64 *handle_array;
1441         int index = 0;
1442         u8 proto = 0;
1443         netdev_tx_t ret = NETDEV_TX_OK;
1444
1445         if (adapter->resetting) {
1446                 if (!netif_subqueue_stopped(netdev, skb))
1447                         netif_stop_subqueue(netdev, queue_num);
1448                 dev_kfree_skb_any(skb);
1449
1450                 tx_send_failed++;
1451                 tx_dropped++;
1452                 ret = NETDEV_TX_OK;
1453                 goto out;
1454         }
1455
1456         if (ibmvnic_xmit_workarounds(skb, netdev)) {
1457                 tx_dropped++;
1458                 tx_send_failed++;
1459                 ret = NETDEV_TX_OK;
1460                 goto out;
1461         }
1462         if (skb_is_gso(skb))
1463                 tx_pool = &adapter->tso_pool[queue_num];
1464         else
1465                 tx_pool = &adapter->tx_pool[queue_num];
1466
1467         tx_scrq = adapter->tx_scrq[queue_num];
1468         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1469         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1470                 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1471
1472         index = tx_pool->free_map[tx_pool->consumer_index];
1473
1474         if (index == IBMVNIC_INVALID_MAP) {
1475                 dev_kfree_skb_any(skb);
1476                 tx_send_failed++;
1477                 tx_dropped++;
1478                 ret = NETDEV_TX_OK;
1479                 goto out;
1480         }
1481
1482         tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1483
1484         offset = index * tx_pool->buf_size;
1485         dst = tx_pool->long_term_buff.buff + offset;
1486         memset(dst, 0, tx_pool->buf_size);
1487         data_dma_addr = tx_pool->long_term_buff.addr + offset;
1488
1489         if (skb_shinfo(skb)->nr_frags) {
1490                 int cur, i;
1491
1492                 /* Copy the head */
1493                 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1494                 cur = skb_headlen(skb);
1495
1496                 /* Copy the frags */
1497                 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1498                         const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1499
1500                         memcpy(dst + cur,
1501                                page_address(skb_frag_page(frag)) +
1502                                frag->page_offset, skb_frag_size(frag));
1503                         cur += skb_frag_size(frag);
1504                 }
1505         } else {
1506                 skb_copy_from_linear_data(skb, dst, skb->len);
1507         }
1508
1509         tx_pool->consumer_index =
1510             (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1511
1512         tx_buff = &tx_pool->tx_buff[index];
1513         tx_buff->skb = skb;
1514         tx_buff->data_dma[0] = data_dma_addr;
1515         tx_buff->data_len[0] = skb->len;
1516         tx_buff->index = index;
1517         tx_buff->pool_index = queue_num;
1518         tx_buff->last_frag = true;
1519
1520         memset(&tx_crq, 0, sizeof(tx_crq));
1521         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1522         tx_crq.v1.type = IBMVNIC_TX_DESC;
1523         tx_crq.v1.n_crq_elem = 1;
1524         tx_crq.v1.n_sge = 1;
1525         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1526
1527         if (skb_is_gso(skb))
1528                 tx_crq.v1.correlator =
1529                         cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1530         else
1531                 tx_crq.v1.correlator = cpu_to_be32(index);
1532         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1533         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1534         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1535
1536         if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
1537                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1538                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1539         }
1540
1541         if (skb->protocol == htons(ETH_P_IP)) {
1542                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1543                 proto = ip_hdr(skb)->protocol;
1544         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1545                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1546                 proto = ipv6_hdr(skb)->nexthdr;
1547         }
1548
1549         if (proto == IPPROTO_TCP)
1550                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1551         else if (proto == IPPROTO_UDP)
1552                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1553
1554         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1555                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1556                 hdrs += 2;
1557         }
1558         if (skb_is_gso(skb)) {
1559                 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1560                 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1561                 hdrs += 2;
1562         }
1563         /* determine if l2/3/4 headers are sent to firmware */
1564         if ((*hdrs >> 7) & 1) {
1565                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1566                 tx_crq.v1.n_crq_elem = num_entries;
1567                 tx_buff->num_entries = num_entries;
1568                 tx_buff->indir_arr[0] = tx_crq;
1569                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1570                                                     sizeof(tx_buff->indir_arr),
1571                                                     DMA_TO_DEVICE);
1572                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1573                         dev_kfree_skb_any(skb);
1574                         tx_buff->skb = NULL;
1575                         if (!firmware_has_feature(FW_FEATURE_CMO))
1576                                 dev_err(dev, "tx: unable to map descriptor array\n");
1577                         tx_map_failed++;
1578                         tx_dropped++;
1579                         ret = NETDEV_TX_OK;
1580                         goto tx_err_out;
1581                 }
1582                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1583                                                (u64)tx_buff->indir_dma,
1584                                                (u64)num_entries);
1585         } else {
1586                 tx_buff->num_entries = num_entries;
1587                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1588                                       &tx_crq);
1589         }
1590         if (lpar_rc != H_SUCCESS) {
1591                 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1592                         dev_err_ratelimited(dev, "tx: send failed\n");
1593                 dev_kfree_skb_any(skb);
1594                 tx_buff->skb = NULL;
1595
1596                 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1597                         /* Disable TX and report carrier off if queue is closed
1598                          * or pending failover.
1599                          * Firmware guarantees that a signal will be sent to the
1600                          * driver, triggering a reset or some other action.
1601                          */
1602                         netif_tx_stop_all_queues(netdev);
1603                         netif_carrier_off(netdev);
1604                 }
1605
1606                 tx_send_failed++;
1607                 tx_dropped++;
1608                 ret = NETDEV_TX_OK;
1609                 goto tx_err_out;
1610         }
1611
1612         if (atomic_add_return(num_entries, &tx_scrq->used)
1613                                         >= adapter->req_tx_entries_per_subcrq) {
1614                 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1615                 netif_stop_subqueue(netdev, queue_num);
1616         }
1617
1618         tx_packets++;
1619         tx_bytes += skb->len;
1620         txq->trans_start = jiffies;
1621         ret = NETDEV_TX_OK;
1622         goto out;
1623
1624 tx_err_out:
1625         /* roll back consumer index and map array*/
1626         if (tx_pool->consumer_index == 0)
1627                 tx_pool->consumer_index =
1628                         tx_pool->num_buffers - 1;
1629         else
1630                 tx_pool->consumer_index--;
1631         tx_pool->free_map[tx_pool->consumer_index] = index;
1632 out:
1633         netdev->stats.tx_dropped += tx_dropped;
1634         netdev->stats.tx_bytes += tx_bytes;
1635         netdev->stats.tx_packets += tx_packets;
1636         adapter->tx_send_failed += tx_send_failed;
1637         adapter->tx_map_failed += tx_map_failed;
1638         adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1639         adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1640         adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1641
1642         return ret;
1643 }
1644
1645 static void ibmvnic_set_multi(struct net_device *netdev)
1646 {
1647         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1648         struct netdev_hw_addr *ha;
1649         union ibmvnic_crq crq;
1650
1651         memset(&crq, 0, sizeof(crq));
1652         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1653         crq.request_capability.cmd = REQUEST_CAPABILITY;
1654
1655         if (netdev->flags & IFF_PROMISC) {
1656                 if (!adapter->promisc_supported)
1657                         return;
1658         } else {
1659                 if (netdev->flags & IFF_ALLMULTI) {
1660                         /* Accept all multicast */
1661                         memset(&crq, 0, sizeof(crq));
1662                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1663                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1664                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1665                         ibmvnic_send_crq(adapter, &crq);
1666                 } else if (netdev_mc_empty(netdev)) {
1667                         /* Reject all multicast */
1668                         memset(&crq, 0, sizeof(crq));
1669                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1670                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1671                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1672                         ibmvnic_send_crq(adapter, &crq);
1673                 } else {
1674                         /* Accept one or more multicast(s) */
1675                         netdev_for_each_mc_addr(ha, netdev) {
1676                                 memset(&crq, 0, sizeof(crq));
1677                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1678                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1679                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1680                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1681                                                 ha->addr);
1682                                 ibmvnic_send_crq(adapter, &crq);
1683                         }
1684                 }
1685         }
1686 }
1687
1688 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1689 {
1690         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1691         struct sockaddr *addr = p;
1692         union ibmvnic_crq crq;
1693         int rc;
1694
1695         if (!is_valid_ether_addr(addr->sa_data))
1696                 return -EADDRNOTAVAIL;
1697
1698         memset(&crq, 0, sizeof(crq));
1699         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1700         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1701         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1702
1703         init_completion(&adapter->fw_done);
1704         rc = ibmvnic_send_crq(adapter, &crq);
1705         if (rc)
1706                 return rc;
1707         wait_for_completion(&adapter->fw_done);
1708         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1709         return adapter->fw_done_rc ? -EIO : 0;
1710 }
1711
1712 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1713 {
1714         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1715         struct sockaddr *addr = p;
1716         int rc;
1717
1718         if (adapter->state == VNIC_PROBED) {
1719                 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1720                 adapter->mac_change_pending = true;
1721                 return 0;
1722         }
1723
1724         rc = __ibmvnic_set_mac(netdev, addr);
1725
1726         return rc;
1727 }
1728
1729 /**
1730  * do_reset returns zero if we are able to keep processing reset events, or
1731  * non-zero if we hit a fatal error and must halt.
1732  */
1733 static int do_reset(struct ibmvnic_adapter *adapter,
1734                     struct ibmvnic_rwi *rwi, u32 reset_state)
1735 {
1736         u64 old_num_rx_queues, old_num_tx_queues;
1737         u64 old_num_rx_slots, old_num_tx_slots;
1738         struct net_device *netdev = adapter->netdev;
1739         int i, rc;
1740
1741         netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1742                    rwi->reset_reason);
1743
1744         netif_carrier_off(netdev);
1745         adapter->reset_reason = rwi->reset_reason;
1746
1747         old_num_rx_queues = adapter->req_rx_queues;
1748         old_num_tx_queues = adapter->req_tx_queues;
1749         old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
1750         old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
1751
1752         ibmvnic_cleanup(netdev);
1753
1754         if (adapter->reset_reason != VNIC_RESET_MOBILITY &&
1755             adapter->reset_reason != VNIC_RESET_FAILOVER) {
1756                 rc = __ibmvnic_close(netdev);
1757                 if (rc)
1758                         return rc;
1759         }
1760
1761         if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1762             adapter->wait_for_reset) {
1763                 release_resources(adapter);
1764                 release_sub_crqs(adapter, 1);
1765                 release_crq_queue(adapter);
1766         }
1767
1768         if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1769                 /* remove the closed state so when we call open it appears
1770                  * we are coming from the probed state.
1771                  */
1772                 adapter->state = VNIC_PROBED;
1773
1774                 if (adapter->wait_for_reset) {
1775                         rc = init_crq_queue(adapter);
1776                 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
1777                         rc = ibmvnic_reenable_crq_queue(adapter);
1778                         release_sub_crqs(adapter, 1);
1779                 } else {
1780                         rc = ibmvnic_reset_crq(adapter);
1781                         if (!rc)
1782                                 rc = vio_enable_interrupts(adapter->vdev);
1783                 }
1784
1785                 if (rc) {
1786                         netdev_err(adapter->netdev,
1787                                    "Couldn't initialize crq. rc=%d\n", rc);
1788                         return rc;
1789                 }
1790
1791                 rc = ibmvnic_reset_init(adapter);
1792                 if (rc)
1793                         return IBMVNIC_INIT_FAILED;
1794
1795                 /* If the adapter was in PROBE state prior to the reset,
1796                  * exit here.
1797                  */
1798                 if (reset_state == VNIC_PROBED)
1799                         return 0;
1800
1801                 rc = ibmvnic_login(netdev);
1802                 if (rc) {
1803                         adapter->state = reset_state;
1804                         return rc;
1805                 }
1806
1807                 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1808                     adapter->wait_for_reset) {
1809                         rc = init_resources(adapter);
1810                         if (rc)
1811                                 return rc;
1812                 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1813                            adapter->req_tx_queues != old_num_tx_queues ||
1814                            adapter->req_rx_add_entries_per_subcrq !=
1815                                                         old_num_rx_slots ||
1816                            adapter->req_tx_entries_per_subcrq !=
1817                                                         old_num_tx_slots) {
1818                         release_rx_pools(adapter);
1819                         release_tx_pools(adapter);
1820                         release_napi(adapter);
1821                         release_vpd_data(adapter);
1822
1823                         rc = init_resources(adapter);
1824                         if (rc)
1825                                 return rc;
1826
1827                 } else {
1828                         rc = reset_tx_pools(adapter);
1829                         if (rc)
1830                                 return rc;
1831
1832                         rc = reset_rx_pools(adapter);
1833                         if (rc)
1834                                 return rc;
1835                 }
1836                 ibmvnic_disable_irqs(adapter);
1837         }
1838         adapter->state = VNIC_CLOSED;
1839
1840         if (reset_state == VNIC_CLOSED)
1841                 return 0;
1842
1843         rc = __ibmvnic_open(netdev);
1844         if (rc) {
1845                 if (list_empty(&adapter->rwi_list))
1846                         adapter->state = VNIC_CLOSED;
1847                 else
1848                         adapter->state = reset_state;
1849
1850                 return 0;
1851         }
1852
1853         /* kick napi */
1854         for (i = 0; i < adapter->req_rx_queues; i++)
1855                 napi_schedule(&adapter->napi[i]);
1856
1857         if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
1858             adapter->reset_reason != VNIC_RESET_CHANGE_PARAM)
1859                 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
1860
1861         netif_carrier_on(netdev);
1862
1863         return 0;
1864 }
1865
1866 static int do_hard_reset(struct ibmvnic_adapter *adapter,
1867                          struct ibmvnic_rwi *rwi, u32 reset_state)
1868 {
1869         struct net_device *netdev = adapter->netdev;
1870         int rc;
1871
1872         netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
1873                    rwi->reset_reason);
1874
1875         netif_carrier_off(netdev);
1876         adapter->reset_reason = rwi->reset_reason;
1877
1878         ibmvnic_cleanup(netdev);
1879         release_resources(adapter);
1880         release_sub_crqs(adapter, 0);
1881         release_crq_queue(adapter);
1882
1883         /* remove the closed state so when we call open it appears
1884          * we are coming from the probed state.
1885          */
1886         adapter->state = VNIC_PROBED;
1887
1888         reinit_completion(&adapter->init_done);
1889         rc = init_crq_queue(adapter);
1890         if (rc) {
1891                 netdev_err(adapter->netdev,
1892                            "Couldn't initialize crq. rc=%d\n", rc);
1893                 return rc;
1894         }
1895
1896         rc = ibmvnic_init(adapter);
1897         if (rc)
1898                 return rc;
1899
1900         /* If the adapter was in PROBE state prior to the reset,
1901          * exit here.
1902          */
1903         if (reset_state == VNIC_PROBED)
1904                 return 0;
1905
1906         rc = ibmvnic_login(netdev);
1907         if (rc) {
1908                 adapter->state = VNIC_PROBED;
1909                 return 0;
1910         }
1911
1912         rc = init_resources(adapter);
1913         if (rc)
1914                 return rc;
1915
1916         ibmvnic_disable_irqs(adapter);
1917         adapter->state = VNIC_CLOSED;
1918
1919         if (reset_state == VNIC_CLOSED)
1920                 return 0;
1921
1922         rc = __ibmvnic_open(netdev);
1923         if (rc) {
1924                 if (list_empty(&adapter->rwi_list))
1925                         adapter->state = VNIC_CLOSED;
1926                 else
1927                         adapter->state = reset_state;
1928
1929                 return 0;
1930         }
1931
1932         netif_carrier_on(netdev);
1933
1934         return 0;
1935 }
1936
1937 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1938 {
1939         struct ibmvnic_rwi *rwi;
1940         unsigned long flags;
1941
1942         spin_lock_irqsave(&adapter->rwi_lock, flags);
1943
1944         if (!list_empty(&adapter->rwi_list)) {
1945                 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1946                                        list);
1947                 list_del(&rwi->list);
1948         } else {
1949                 rwi = NULL;
1950         }
1951
1952         spin_unlock_irqrestore(&adapter->rwi_lock, flags);
1953         return rwi;
1954 }
1955
1956 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1957 {
1958         struct ibmvnic_rwi *rwi;
1959
1960         rwi = get_next_rwi(adapter);
1961         while (rwi) {
1962                 kfree(rwi);
1963                 rwi = get_next_rwi(adapter);
1964         }
1965 }
1966
1967 static void __ibmvnic_reset(struct work_struct *work)
1968 {
1969         struct ibmvnic_rwi *rwi;
1970         struct ibmvnic_adapter *adapter;
1971         struct net_device *netdev;
1972         bool we_lock_rtnl = false;
1973         u32 reset_state;
1974         int rc = 0;
1975
1976         adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1977         netdev = adapter->netdev;
1978
1979         /* netif_set_real_num_xx_queues needs to take rtnl lock here
1980          * unless wait_for_reset is set, in which case the rtnl lock
1981          * has already been taken before initializing the reset
1982          */
1983         if (!adapter->wait_for_reset) {
1984                 rtnl_lock();
1985                 we_lock_rtnl = true;
1986         }
1987         reset_state = adapter->state;
1988
1989         rwi = get_next_rwi(adapter);
1990         while (rwi) {
1991                 if (adapter->force_reset_recovery) {
1992                         adapter->force_reset_recovery = false;
1993                         rc = do_hard_reset(adapter, rwi, reset_state);
1994                 } else {
1995                         rc = do_reset(adapter, rwi, reset_state);
1996                 }
1997                 kfree(rwi);
1998                 if (rc && rc != IBMVNIC_INIT_FAILED &&
1999                     !adapter->force_reset_recovery)
2000                         break;
2001
2002                 rwi = get_next_rwi(adapter);
2003         }
2004
2005         if (adapter->wait_for_reset) {
2006                 adapter->wait_for_reset = false;
2007                 adapter->reset_done_rc = rc;
2008                 complete(&adapter->reset_done);
2009         }
2010
2011         if (rc) {
2012                 netdev_dbg(adapter->netdev, "Reset failed\n");
2013                 free_all_rwi(adapter);
2014         }
2015
2016         adapter->resetting = false;
2017         if (we_lock_rtnl)
2018                 rtnl_unlock();
2019 }
2020
2021 static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2022                          enum ibmvnic_reset_reason reason)
2023 {
2024         struct list_head *entry, *tmp_entry;
2025         struct ibmvnic_rwi *rwi, *tmp;
2026         struct net_device *netdev = adapter->netdev;
2027         unsigned long flags;
2028         int ret;
2029
2030         if (adapter->state == VNIC_REMOVING ||
2031             adapter->state == VNIC_REMOVED ||
2032             adapter->failover_pending) {
2033                 ret = EBUSY;
2034                 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2035                 goto err;
2036         }
2037
2038         if (adapter->state == VNIC_PROBING) {
2039                 netdev_warn(netdev, "Adapter reset during probe\n");
2040                 ret = adapter->init_done_rc = EAGAIN;
2041                 goto err;
2042         }
2043
2044         spin_lock_irqsave(&adapter->rwi_lock, flags);
2045
2046         list_for_each(entry, &adapter->rwi_list) {
2047                 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2048                 if (tmp->reset_reason == reason) {
2049                         netdev_dbg(netdev, "Skipping matching reset\n");
2050                         spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2051                         ret = EBUSY;
2052                         goto err;
2053                 }
2054         }
2055
2056         rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
2057         if (!rwi) {
2058                 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2059                 ibmvnic_close(netdev);
2060                 ret = ENOMEM;
2061                 goto err;
2062         }
2063         /* if we just received a transport event,
2064          * flush reset queue and process this reset
2065          */
2066         if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2067                 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2068                         list_del(entry);
2069         }
2070         rwi->reset_reason = reason;
2071         list_add_tail(&rwi->list, &adapter->rwi_list);
2072         spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2073         adapter->resetting = true;
2074         netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
2075         schedule_work(&adapter->ibmvnic_reset);
2076
2077         return 0;
2078 err:
2079         if (adapter->wait_for_reset)
2080                 adapter->wait_for_reset = false;
2081         return -ret;
2082 }
2083
2084 static void ibmvnic_tx_timeout(struct net_device *dev)
2085 {
2086         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2087
2088         ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2089 }
2090
2091 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2092                                   struct ibmvnic_rx_buff *rx_buff)
2093 {
2094         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2095
2096         rx_buff->skb = NULL;
2097
2098         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2099         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2100
2101         atomic_dec(&pool->available);
2102 }
2103
2104 static int ibmvnic_poll(struct napi_struct *napi, int budget)
2105 {
2106         struct net_device *netdev = napi->dev;
2107         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2108         int scrq_num = (int)(napi - adapter->napi);
2109         int frames_processed = 0;
2110
2111 restart_poll:
2112         while (frames_processed < budget) {
2113                 struct sk_buff *skb;
2114                 struct ibmvnic_rx_buff *rx_buff;
2115                 union sub_crq *next;
2116                 u32 length;
2117                 u16 offset;
2118                 u8 flags = 0;
2119
2120                 if (unlikely(adapter->resetting &&
2121                              adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2122                         enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2123                         napi_complete_done(napi, frames_processed);
2124                         return frames_processed;
2125                 }
2126
2127                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2128                         break;
2129                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2130                 rx_buff =
2131                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2132                                                           rx_comp.correlator);
2133                 /* do error checking */
2134                 if (next->rx_comp.rc) {
2135                         netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2136                                    be16_to_cpu(next->rx_comp.rc));
2137                         /* free the entry */
2138                         next->rx_comp.first = 0;
2139                         dev_kfree_skb_any(rx_buff->skb);
2140                         remove_buff_from_pool(adapter, rx_buff);
2141                         continue;
2142                 } else if (!rx_buff->skb) {
2143                         /* free the entry */
2144                         next->rx_comp.first = 0;
2145                         remove_buff_from_pool(adapter, rx_buff);
2146                         continue;
2147                 }
2148
2149                 length = be32_to_cpu(next->rx_comp.len);
2150                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2151                 flags = next->rx_comp.flags;
2152                 skb = rx_buff->skb;
2153                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2154                                         length);
2155
2156                 /* VLAN Header has been stripped by the system firmware and
2157                  * needs to be inserted by the driver
2158                  */
2159                 if (adapter->rx_vlan_header_insertion &&
2160                     (flags & IBMVNIC_VLAN_STRIPPED))
2161                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2162                                                ntohs(next->rx_comp.vlan_tci));
2163
2164                 /* free the entry */
2165                 next->rx_comp.first = 0;
2166                 remove_buff_from_pool(adapter, rx_buff);
2167
2168                 skb_put(skb, length);
2169                 skb->protocol = eth_type_trans(skb, netdev);
2170                 skb_record_rx_queue(skb, scrq_num);
2171
2172                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2173                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2174                         skb->ip_summed = CHECKSUM_UNNECESSARY;
2175                 }
2176
2177                 length = skb->len;
2178                 napi_gro_receive(napi, skb); /* send it up */
2179                 netdev->stats.rx_packets++;
2180                 netdev->stats.rx_bytes += length;
2181                 adapter->rx_stats_buffers[scrq_num].packets++;
2182                 adapter->rx_stats_buffers[scrq_num].bytes += length;
2183                 frames_processed++;
2184         }
2185
2186         if (adapter->state != VNIC_CLOSING)
2187                 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2188
2189         if (frames_processed < budget) {
2190                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2191                 napi_complete_done(napi, frames_processed);
2192                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2193                     napi_reschedule(napi)) {
2194                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2195                         goto restart_poll;
2196                 }
2197         }
2198         return frames_processed;
2199 }
2200
2201 static int wait_for_reset(struct ibmvnic_adapter *adapter)
2202 {
2203         int rc, ret;
2204
2205         adapter->fallback.mtu = adapter->req_mtu;
2206         adapter->fallback.rx_queues = adapter->req_rx_queues;
2207         adapter->fallback.tx_queues = adapter->req_tx_queues;
2208         adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2209         adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2210
2211         init_completion(&adapter->reset_done);
2212         adapter->wait_for_reset = true;
2213         rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2214         if (rc)
2215                 return rc;
2216         wait_for_completion(&adapter->reset_done);
2217
2218         ret = 0;
2219         if (adapter->reset_done_rc) {
2220                 ret = -EIO;
2221                 adapter->desired.mtu = adapter->fallback.mtu;
2222                 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2223                 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2224                 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2225                 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2226
2227                 init_completion(&adapter->reset_done);
2228                 adapter->wait_for_reset = true;
2229                 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2230                 if (rc)
2231                         return ret;
2232                 wait_for_completion(&adapter->reset_done);
2233         }
2234         adapter->wait_for_reset = false;
2235
2236         return ret;
2237 }
2238
2239 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2240 {
2241         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2242
2243         adapter->desired.mtu = new_mtu + ETH_HLEN;
2244
2245         return wait_for_reset(adapter);
2246 }
2247
2248 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2249                                                 struct net_device *dev,
2250                                                 netdev_features_t features)
2251 {
2252         /* Some backing hardware adapters can not
2253          * handle packets with a MSS less than 224
2254          * or with only one segment.
2255          */
2256         if (skb_is_gso(skb)) {
2257                 if (skb_shinfo(skb)->gso_size < 224 ||
2258                     skb_shinfo(skb)->gso_segs == 1)
2259                         features &= ~NETIF_F_GSO_MASK;
2260         }
2261
2262         return features;
2263 }
2264
2265 static const struct net_device_ops ibmvnic_netdev_ops = {
2266         .ndo_open               = ibmvnic_open,
2267         .ndo_stop               = ibmvnic_close,
2268         .ndo_start_xmit         = ibmvnic_xmit,
2269         .ndo_set_rx_mode        = ibmvnic_set_multi,
2270         .ndo_set_mac_address    = ibmvnic_set_mac,
2271         .ndo_validate_addr      = eth_validate_addr,
2272         .ndo_tx_timeout         = ibmvnic_tx_timeout,
2273         .ndo_change_mtu         = ibmvnic_change_mtu,
2274         .ndo_features_check     = ibmvnic_features_check,
2275 };
2276
2277 /* ethtool functions */
2278
2279 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2280                                       struct ethtool_link_ksettings *cmd)
2281 {
2282         u32 supported, advertising;
2283
2284         supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
2285                           SUPPORTED_FIBRE);
2286         advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
2287                             ADVERTISED_FIBRE);
2288         cmd->base.speed = SPEED_1000;
2289         cmd->base.duplex = DUPLEX_FULL;
2290         cmd->base.port = PORT_FIBRE;
2291         cmd->base.phy_address = 0;
2292         cmd->base.autoneg = AUTONEG_ENABLE;
2293
2294         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2295                                                 supported);
2296         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2297                                                 advertising);
2298
2299         return 0;
2300 }
2301
2302 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2303                                 struct ethtool_drvinfo *info)
2304 {
2305         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2306
2307         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2308         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2309         strlcpy(info->fw_version, adapter->fw_version,
2310                 sizeof(info->fw_version));
2311 }
2312
2313 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2314 {
2315         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2316
2317         return adapter->msg_enable;
2318 }
2319
2320 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2321 {
2322         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2323
2324         adapter->msg_enable = data;
2325 }
2326
2327 static u32 ibmvnic_get_link(struct net_device *netdev)
2328 {
2329         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2330
2331         /* Don't need to send a query because we request a logical link up at
2332          * init and then we wait for link state indications
2333          */
2334         return adapter->logical_link_state;
2335 }
2336
2337 static void ibmvnic_get_ringparam(struct net_device *netdev,
2338                                   struct ethtool_ringparam *ring)
2339 {
2340         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2341
2342         if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2343                 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2344                 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2345         } else {
2346                 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2347                 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2348         }
2349         ring->rx_mini_max_pending = 0;
2350         ring->rx_jumbo_max_pending = 0;
2351         ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2352         ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2353         ring->rx_mini_pending = 0;
2354         ring->rx_jumbo_pending = 0;
2355 }
2356
2357 static int ibmvnic_set_ringparam(struct net_device *netdev,
2358                                  struct ethtool_ringparam *ring)
2359 {
2360         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2361         int ret;
2362
2363         ret = 0;
2364         adapter->desired.rx_entries = ring->rx_pending;
2365         adapter->desired.tx_entries = ring->tx_pending;
2366
2367         ret = wait_for_reset(adapter);
2368
2369         if (!ret &&
2370             (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending ||
2371              adapter->req_tx_entries_per_subcrq != ring->tx_pending))
2372                 netdev_info(netdev,
2373                             "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2374                             ring->rx_pending, ring->tx_pending,
2375                             adapter->req_rx_add_entries_per_subcrq,
2376                             adapter->req_tx_entries_per_subcrq);
2377         return ret;
2378 }
2379
2380 static void ibmvnic_get_channels(struct net_device *netdev,
2381                                  struct ethtool_channels *channels)
2382 {
2383         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2384
2385         if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2386                 channels->max_rx = adapter->max_rx_queues;
2387                 channels->max_tx = adapter->max_tx_queues;
2388         } else {
2389                 channels->max_rx = IBMVNIC_MAX_QUEUES;
2390                 channels->max_tx = IBMVNIC_MAX_QUEUES;
2391         }
2392
2393         channels->max_other = 0;
2394         channels->max_combined = 0;
2395         channels->rx_count = adapter->req_rx_queues;
2396         channels->tx_count = adapter->req_tx_queues;
2397         channels->other_count = 0;
2398         channels->combined_count = 0;
2399 }
2400
2401 static int ibmvnic_set_channels(struct net_device *netdev,
2402                                 struct ethtool_channels *channels)
2403 {
2404         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2405         int ret;
2406
2407         ret = 0;
2408         adapter->desired.rx_queues = channels->rx_count;
2409         adapter->desired.tx_queues = channels->tx_count;
2410
2411         ret = wait_for_reset(adapter);
2412
2413         if (!ret &&
2414             (adapter->req_rx_queues != channels->rx_count ||
2415              adapter->req_tx_queues != channels->tx_count))
2416                 netdev_info(netdev,
2417                             "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2418                             channels->rx_count, channels->tx_count,
2419                             adapter->req_rx_queues, adapter->req_tx_queues);
2420         return ret;
2421
2422 }
2423
2424 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2425 {
2426         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2427         int i;
2428
2429         switch (stringset) {
2430         case ETH_SS_STATS:
2431                 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats);
2432                                 i++, data += ETH_GSTRING_LEN)
2433                         memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2434
2435                 for (i = 0; i < adapter->req_tx_queues; i++) {
2436                         snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2437                         data += ETH_GSTRING_LEN;
2438
2439                         snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2440                         data += ETH_GSTRING_LEN;
2441
2442                         snprintf(data, ETH_GSTRING_LEN,
2443                                  "tx%d_dropped_packets", i);
2444                         data += ETH_GSTRING_LEN;
2445                 }
2446
2447                 for (i = 0; i < adapter->req_rx_queues; i++) {
2448                         snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2449                         data += ETH_GSTRING_LEN;
2450
2451                         snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2452                         data += ETH_GSTRING_LEN;
2453
2454                         snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2455                         data += ETH_GSTRING_LEN;
2456                 }
2457                 break;
2458
2459         case ETH_SS_PRIV_FLAGS:
2460                 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++)
2461                         strcpy(data + i * ETH_GSTRING_LEN,
2462                                ibmvnic_priv_flags[i]);
2463                 break;
2464         default:
2465                 return;
2466         }
2467 }
2468
2469 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2470 {
2471         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2472
2473         switch (sset) {
2474         case ETH_SS_STATS:
2475                 return ARRAY_SIZE(ibmvnic_stats) +
2476                        adapter->req_tx_queues * NUM_TX_STATS +
2477                        adapter->req_rx_queues * NUM_RX_STATS;
2478         case ETH_SS_PRIV_FLAGS:
2479                 return ARRAY_SIZE(ibmvnic_priv_flags);
2480         default:
2481                 return -EOPNOTSUPP;
2482         }
2483 }
2484
2485 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2486                                       struct ethtool_stats *stats, u64 *data)
2487 {
2488         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2489         union ibmvnic_crq crq;
2490         int i, j;
2491         int rc;
2492
2493         memset(&crq, 0, sizeof(crq));
2494         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2495         crq.request_statistics.cmd = REQUEST_STATISTICS;
2496         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2497         crq.request_statistics.len =
2498             cpu_to_be32(sizeof(struct ibmvnic_statistics));
2499
2500         /* Wait for data to be written */
2501         init_completion(&adapter->stats_done);
2502         rc = ibmvnic_send_crq(adapter, &crq);
2503         if (rc)
2504                 return;
2505         wait_for_completion(&adapter->stats_done);
2506
2507         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2508                 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2509                                                 ibmvnic_stats[i].offset));
2510
2511         for (j = 0; j < adapter->req_tx_queues; j++) {
2512                 data[i] = adapter->tx_stats_buffers[j].packets;
2513                 i++;
2514                 data[i] = adapter->tx_stats_buffers[j].bytes;
2515                 i++;
2516                 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2517                 i++;
2518         }
2519
2520         for (j = 0; j < adapter->req_rx_queues; j++) {
2521                 data[i] = adapter->rx_stats_buffers[j].packets;
2522                 i++;
2523                 data[i] = adapter->rx_stats_buffers[j].bytes;
2524                 i++;
2525                 data[i] = adapter->rx_stats_buffers[j].interrupts;
2526                 i++;
2527         }
2528 }
2529
2530 static u32 ibmvnic_get_priv_flags(struct net_device *netdev)
2531 {
2532         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2533
2534         return adapter->priv_flags;
2535 }
2536
2537 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags)
2538 {
2539         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2540         bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES);
2541
2542         if (which_maxes)
2543                 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES;
2544         else
2545                 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES;
2546
2547         return 0;
2548 }
2549 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2550         .get_drvinfo            = ibmvnic_get_drvinfo,
2551         .get_msglevel           = ibmvnic_get_msglevel,
2552         .set_msglevel           = ibmvnic_set_msglevel,
2553         .get_link               = ibmvnic_get_link,
2554         .get_ringparam          = ibmvnic_get_ringparam,
2555         .set_ringparam          = ibmvnic_set_ringparam,
2556         .get_channels           = ibmvnic_get_channels,
2557         .set_channels           = ibmvnic_set_channels,
2558         .get_strings            = ibmvnic_get_strings,
2559         .get_sset_count         = ibmvnic_get_sset_count,
2560         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
2561         .get_link_ksettings     = ibmvnic_get_link_ksettings,
2562         .get_priv_flags         = ibmvnic_get_priv_flags,
2563         .set_priv_flags         = ibmvnic_set_priv_flags,
2564 };
2565
2566 /* Routines for managing CRQs/sCRQs  */
2567
2568 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2569                                    struct ibmvnic_sub_crq_queue *scrq)
2570 {
2571         int rc;
2572
2573         if (scrq->irq) {
2574                 free_irq(scrq->irq, scrq);
2575                 irq_dispose_mapping(scrq->irq);
2576                 scrq->irq = 0;
2577         }
2578
2579         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2580         atomic_set(&scrq->used, 0);
2581         scrq->cur = 0;
2582
2583         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2584                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2585         return rc;
2586 }
2587
2588 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2589 {
2590         int i, rc;
2591
2592         for (i = 0; i < adapter->req_tx_queues; i++) {
2593                 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2594                 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2595                 if (rc)
2596                         return rc;
2597         }
2598
2599         for (i = 0; i < adapter->req_rx_queues; i++) {
2600                 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2601                 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2602                 if (rc)
2603                         return rc;
2604         }
2605
2606         return rc;
2607 }
2608
2609 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2610                                   struct ibmvnic_sub_crq_queue *scrq,
2611                                   bool do_h_free)
2612 {
2613         struct device *dev = &adapter->vdev->dev;
2614         long rc;
2615
2616         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2617
2618         if (do_h_free) {
2619                 /* Close the sub-crqs */
2620                 do {
2621                         rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2622                                                 adapter->vdev->unit_address,
2623                                                 scrq->crq_num);
2624                 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2625
2626                 if (rc) {
2627                         netdev_err(adapter->netdev,
2628                                    "Failed to release sub-CRQ %16lx, rc = %ld\n",
2629                                    scrq->crq_num, rc);
2630                 }
2631         }
2632
2633         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2634                          DMA_BIDIRECTIONAL);
2635         free_pages((unsigned long)scrq->msgs, 2);
2636         kfree(scrq);
2637 }
2638
2639 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2640                                                         *adapter)
2641 {
2642         struct device *dev = &adapter->vdev->dev;
2643         struct ibmvnic_sub_crq_queue *scrq;
2644         int rc;
2645
2646         scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2647         if (!scrq)
2648                 return NULL;
2649
2650         scrq->msgs =
2651                 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2652         if (!scrq->msgs) {
2653                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2654                 goto zero_page_failed;
2655         }
2656
2657         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2658                                          DMA_BIDIRECTIONAL);
2659         if (dma_mapping_error(dev, scrq->msg_token)) {
2660                 dev_warn(dev, "Couldn't map crq queue messages page\n");
2661                 goto map_failed;
2662         }
2663
2664         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2665                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2666
2667         if (rc == H_RESOURCE)
2668                 rc = ibmvnic_reset_crq(adapter);
2669
2670         if (rc == H_CLOSED) {
2671                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2672         } else if (rc) {
2673                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2674                 goto reg_failed;
2675         }
2676
2677         scrq->adapter = adapter;
2678         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2679         spin_lock_init(&scrq->lock);
2680
2681         netdev_dbg(adapter->netdev,
2682                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2683                    scrq->crq_num, scrq->hw_irq, scrq->irq);
2684
2685         return scrq;
2686
2687 reg_failed:
2688         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2689                          DMA_BIDIRECTIONAL);
2690 map_failed:
2691         free_pages((unsigned long)scrq->msgs, 2);
2692 zero_page_failed:
2693         kfree(scrq);
2694
2695         return NULL;
2696 }
2697
2698 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2699 {
2700         int i;
2701
2702         if (adapter->tx_scrq) {
2703                 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2704                         if (!adapter->tx_scrq[i])
2705                                 continue;
2706
2707                         netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2708                                    i);
2709                         if (adapter->tx_scrq[i]->irq) {
2710                                 free_irq(adapter->tx_scrq[i]->irq,
2711                                          adapter->tx_scrq[i]);
2712                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2713                                 adapter->tx_scrq[i]->irq = 0;
2714                         }
2715
2716                         release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2717                                               do_h_free);
2718                 }
2719
2720                 kfree(adapter->tx_scrq);
2721                 adapter->tx_scrq = NULL;
2722                 adapter->num_active_tx_scrqs = 0;
2723         }
2724
2725         if (adapter->rx_scrq) {
2726                 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2727                         if (!adapter->rx_scrq[i])
2728                                 continue;
2729
2730                         netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2731                                    i);
2732                         if (adapter->rx_scrq[i]->irq) {
2733                                 free_irq(adapter->rx_scrq[i]->irq,
2734                                          adapter->rx_scrq[i]);
2735                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2736                                 adapter->rx_scrq[i]->irq = 0;
2737                         }
2738
2739                         release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2740                                               do_h_free);
2741                 }
2742
2743                 kfree(adapter->rx_scrq);
2744                 adapter->rx_scrq = NULL;
2745                 adapter->num_active_rx_scrqs = 0;
2746         }
2747 }
2748
2749 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2750                             struct ibmvnic_sub_crq_queue *scrq)
2751 {
2752         struct device *dev = &adapter->vdev->dev;
2753         unsigned long rc;
2754
2755         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2756                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2757         if (rc)
2758                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2759                         scrq->hw_irq, rc);
2760         return rc;
2761 }
2762
2763 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2764                            struct ibmvnic_sub_crq_queue *scrq)
2765 {
2766         struct device *dev = &adapter->vdev->dev;
2767         unsigned long rc;
2768
2769         if (scrq->hw_irq > 0x100000000ULL) {
2770                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2771                 return 1;
2772         }
2773
2774         if (adapter->resetting &&
2775             adapter->reset_reason == VNIC_RESET_MOBILITY) {
2776                 u64 val = (0xff000000) | scrq->hw_irq;
2777
2778                 rc = plpar_hcall_norets(H_EOI, val);
2779                 if (rc)
2780                         dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
2781                                 val, rc);
2782         }
2783
2784         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2785                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2786         if (rc)
2787                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2788                         scrq->hw_irq, rc);
2789         return rc;
2790 }
2791
2792 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2793                                struct ibmvnic_sub_crq_queue *scrq)
2794 {
2795         struct device *dev = &adapter->vdev->dev;
2796         struct ibmvnic_tx_pool *tx_pool;
2797         struct ibmvnic_tx_buff *txbuff;
2798         union sub_crq *next;
2799         int index;
2800         int i, j;
2801         u8 *first;
2802
2803 restart_loop:
2804         while (pending_scrq(adapter, scrq)) {
2805                 unsigned int pool = scrq->pool_index;
2806                 int num_entries = 0;
2807
2808                 next = ibmvnic_next_scrq(adapter, scrq);
2809                 for (i = 0; i < next->tx_comp.num_comps; i++) {
2810                         if (next->tx_comp.rcs[i]) {
2811                                 dev_err(dev, "tx error %x\n",
2812                                         next->tx_comp.rcs[i]);
2813                                 continue;
2814                         }
2815                         index = be32_to_cpu(next->tx_comp.correlators[i]);
2816                         if (index & IBMVNIC_TSO_POOL_MASK) {
2817                                 tx_pool = &adapter->tso_pool[pool];
2818                                 index &= ~IBMVNIC_TSO_POOL_MASK;
2819                         } else {
2820                                 tx_pool = &adapter->tx_pool[pool];
2821                         }
2822
2823                         txbuff = &tx_pool->tx_buff[index];
2824
2825                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2826                                 if (!txbuff->data_dma[j])
2827                                         continue;
2828
2829                                 txbuff->data_dma[j] = 0;
2830                         }
2831                         /* if sub_crq was sent indirectly */
2832                         first = &txbuff->indir_arr[0].generic.first;
2833                         if (*first == IBMVNIC_CRQ_CMD) {
2834                                 dma_unmap_single(dev, txbuff->indir_dma,
2835                                                  sizeof(txbuff->indir_arr),
2836                                                  DMA_TO_DEVICE);
2837                                 *first = 0;
2838                         }
2839
2840                         if (txbuff->last_frag) {
2841                                 dev_kfree_skb_any(txbuff->skb);
2842                                 txbuff->skb = NULL;
2843                         }
2844
2845                         num_entries += txbuff->num_entries;
2846
2847                         tx_pool->free_map[tx_pool->producer_index] = index;
2848                         tx_pool->producer_index =
2849                                 (tx_pool->producer_index + 1) %
2850                                         tx_pool->num_buffers;
2851                 }
2852                 /* remove tx_comp scrq*/
2853                 next->tx_comp.first = 0;
2854
2855                 if (atomic_sub_return(num_entries, &scrq->used) <=
2856                     (adapter->req_tx_entries_per_subcrq / 2) &&
2857                     __netif_subqueue_stopped(adapter->netdev,
2858                                              scrq->pool_index)) {
2859                         netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2860                         netdev_dbg(adapter->netdev, "Started queue %d\n",
2861                                    scrq->pool_index);
2862                 }
2863         }
2864
2865         enable_scrq_irq(adapter, scrq);
2866
2867         if (pending_scrq(adapter, scrq)) {
2868                 disable_scrq_irq(adapter, scrq);
2869                 goto restart_loop;
2870         }
2871
2872         return 0;
2873 }
2874
2875 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2876 {
2877         struct ibmvnic_sub_crq_queue *scrq = instance;
2878         struct ibmvnic_adapter *adapter = scrq->adapter;
2879
2880         disable_scrq_irq(adapter, scrq);
2881         ibmvnic_complete_tx(adapter, scrq);
2882
2883         return IRQ_HANDLED;
2884 }
2885
2886 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2887 {
2888         struct ibmvnic_sub_crq_queue *scrq = instance;
2889         struct ibmvnic_adapter *adapter = scrq->adapter;
2890
2891         /* When booting a kdump kernel we can hit pending interrupts
2892          * prior to completing driver initialization.
2893          */
2894         if (unlikely(adapter->state != VNIC_OPEN))
2895                 return IRQ_NONE;
2896
2897         adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2898
2899         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2900                 disable_scrq_irq(adapter, scrq);
2901                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2902         }
2903
2904         return IRQ_HANDLED;
2905 }
2906
2907 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2908 {
2909         struct device *dev = &adapter->vdev->dev;
2910         struct ibmvnic_sub_crq_queue *scrq;
2911         int i = 0, j = 0;
2912         int rc = 0;
2913
2914         for (i = 0; i < adapter->req_tx_queues; i++) {
2915                 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2916                            i);
2917                 scrq = adapter->tx_scrq[i];
2918                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2919
2920                 if (!scrq->irq) {
2921                         rc = -EINVAL;
2922                         dev_err(dev, "Error mapping irq\n");
2923                         goto req_tx_irq_failed;
2924                 }
2925
2926                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2927                                  0, "ibmvnic_tx", scrq);
2928
2929                 if (rc) {
2930                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2931                                 scrq->irq, rc);
2932                         irq_dispose_mapping(scrq->irq);
2933                         goto req_tx_irq_failed;
2934                 }
2935         }
2936
2937         for (i = 0; i < adapter->req_rx_queues; i++) {
2938                 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2939                            i);
2940                 scrq = adapter->rx_scrq[i];
2941                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2942                 if (!scrq->irq) {
2943                         rc = -EINVAL;
2944                         dev_err(dev, "Error mapping irq\n");
2945                         goto req_rx_irq_failed;
2946                 }
2947                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2948                                  0, "ibmvnic_rx", scrq);
2949                 if (rc) {
2950                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2951                                 scrq->irq, rc);
2952                         irq_dispose_mapping(scrq->irq);
2953                         goto req_rx_irq_failed;
2954                 }
2955         }
2956         return rc;
2957
2958 req_rx_irq_failed:
2959         for (j = 0; j < i; j++) {
2960                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2961                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2962         }
2963         i = adapter->req_tx_queues;
2964 req_tx_irq_failed:
2965         for (j = 0; j < i; j++) {
2966                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2967                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2968         }
2969         release_sub_crqs(adapter, 1);
2970         return rc;
2971 }
2972
2973 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2974 {
2975         struct device *dev = &adapter->vdev->dev;
2976         struct ibmvnic_sub_crq_queue **allqueues;
2977         int registered_queues = 0;
2978         int total_queues;
2979         int more = 0;
2980         int i;
2981
2982         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2983
2984         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2985         if (!allqueues)
2986                 return -1;
2987
2988         for (i = 0; i < total_queues; i++) {
2989                 allqueues[i] = init_sub_crq_queue(adapter);
2990                 if (!allqueues[i]) {
2991                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2992                         break;
2993                 }
2994                 registered_queues++;
2995         }
2996
2997         /* Make sure we were able to register the minimum number of queues */
2998         if (registered_queues <
2999             adapter->min_tx_queues + adapter->min_rx_queues) {
3000                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
3001                 goto tx_failed;
3002         }
3003
3004         /* Distribute the failed allocated queues*/
3005         for (i = 0; i < total_queues - registered_queues + more ; i++) {
3006                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
3007                 switch (i % 3) {
3008                 case 0:
3009                         if (adapter->req_rx_queues > adapter->min_rx_queues)
3010                                 adapter->req_rx_queues--;
3011                         else
3012                                 more++;
3013                         break;
3014                 case 1:
3015                         if (adapter->req_tx_queues > adapter->min_tx_queues)
3016                                 adapter->req_tx_queues--;
3017                         else
3018                                 more++;
3019                         break;
3020                 }
3021         }
3022
3023         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
3024                                    sizeof(*adapter->tx_scrq), GFP_KERNEL);
3025         if (!adapter->tx_scrq)
3026                 goto tx_failed;
3027
3028         for (i = 0; i < adapter->req_tx_queues; i++) {
3029                 adapter->tx_scrq[i] = allqueues[i];
3030                 adapter->tx_scrq[i]->pool_index = i;
3031                 adapter->num_active_tx_scrqs++;
3032         }
3033
3034         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
3035                                    sizeof(*adapter->rx_scrq), GFP_KERNEL);
3036         if (!adapter->rx_scrq)
3037                 goto rx_failed;
3038
3039         for (i = 0; i < adapter->req_rx_queues; i++) {
3040                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3041                 adapter->rx_scrq[i]->scrq_num = i;
3042                 adapter->num_active_rx_scrqs++;
3043         }
3044
3045         kfree(allqueues);
3046         return 0;
3047
3048 rx_failed:
3049         kfree(adapter->tx_scrq);
3050         adapter->tx_scrq = NULL;
3051 tx_failed:
3052         for (i = 0; i < registered_queues; i++)
3053                 release_sub_crq_queue(adapter, allqueues[i], 1);
3054         kfree(allqueues);
3055         return -1;
3056 }
3057
3058 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
3059 {
3060         struct device *dev = &adapter->vdev->dev;
3061         union ibmvnic_crq crq;
3062         int max_entries;
3063
3064         if (!retry) {
3065                 /* Sub-CRQ entries are 32 byte long */
3066                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3067
3068                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3069                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
3070                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3071                         return;
3072                 }
3073
3074                 if (adapter->desired.mtu)
3075                         adapter->req_mtu = adapter->desired.mtu;
3076                 else
3077                         adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3078
3079                 if (!adapter->desired.tx_entries)
3080                         adapter->desired.tx_entries =
3081                                         adapter->max_tx_entries_per_subcrq;
3082                 if (!adapter->desired.rx_entries)
3083                         adapter->desired.rx_entries =
3084                                         adapter->max_rx_add_entries_per_subcrq;
3085
3086                 max_entries = IBMVNIC_MAX_LTB_SIZE /
3087                               (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3088
3089                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3090                         adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3091                         adapter->desired.tx_entries = max_entries;
3092                 }
3093
3094                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3095                         adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3096                         adapter->desired.rx_entries = max_entries;
3097                 }
3098
3099                 if (adapter->desired.tx_entries)
3100                         adapter->req_tx_entries_per_subcrq =
3101                                         adapter->desired.tx_entries;
3102                 else
3103                         adapter->req_tx_entries_per_subcrq =
3104                                         adapter->max_tx_entries_per_subcrq;
3105
3106                 if (adapter->desired.rx_entries)
3107                         adapter->req_rx_add_entries_per_subcrq =
3108                                         adapter->desired.rx_entries;
3109                 else
3110                         adapter->req_rx_add_entries_per_subcrq =
3111                                         adapter->max_rx_add_entries_per_subcrq;
3112
3113                 if (adapter->desired.tx_queues)
3114                         adapter->req_tx_queues =
3115                                         adapter->desired.tx_queues;
3116                 else
3117                         adapter->req_tx_queues =
3118                                         adapter->opt_tx_comp_sub_queues;
3119
3120                 if (adapter->desired.rx_queues)
3121                         adapter->req_rx_queues =
3122                                         adapter->desired.rx_queues;
3123                 else
3124                         adapter->req_rx_queues =
3125                                         adapter->opt_rx_comp_queues;
3126
3127                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3128         }
3129
3130         memset(&crq, 0, sizeof(crq));
3131         crq.request_capability.first = IBMVNIC_CRQ_CMD;
3132         crq.request_capability.cmd = REQUEST_CAPABILITY;
3133
3134         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3135         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3136         atomic_inc(&adapter->running_cap_crqs);
3137         ibmvnic_send_crq(adapter, &crq);
3138
3139         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3140         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3141         atomic_inc(&adapter->running_cap_crqs);
3142         ibmvnic_send_crq(adapter, &crq);
3143
3144         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3145         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3146         atomic_inc(&adapter->running_cap_crqs);
3147         ibmvnic_send_crq(adapter, &crq);
3148
3149         crq.request_capability.capability =
3150             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3151         crq.request_capability.number =
3152             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3153         atomic_inc(&adapter->running_cap_crqs);
3154         ibmvnic_send_crq(adapter, &crq);
3155
3156         crq.request_capability.capability =
3157             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3158         crq.request_capability.number =
3159             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3160         atomic_inc(&adapter->running_cap_crqs);
3161         ibmvnic_send_crq(adapter, &crq);
3162
3163         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3164         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3165         atomic_inc(&adapter->running_cap_crqs);
3166         ibmvnic_send_crq(adapter, &crq);
3167
3168         if (adapter->netdev->flags & IFF_PROMISC) {
3169                 if (adapter->promisc_supported) {
3170                         crq.request_capability.capability =
3171                             cpu_to_be16(PROMISC_REQUESTED);
3172                         crq.request_capability.number = cpu_to_be64(1);
3173                         atomic_inc(&adapter->running_cap_crqs);
3174                         ibmvnic_send_crq(adapter, &crq);
3175                 }
3176         } else {
3177                 crq.request_capability.capability =
3178                     cpu_to_be16(PROMISC_REQUESTED);
3179                 crq.request_capability.number = cpu_to_be64(0);
3180                 atomic_inc(&adapter->running_cap_crqs);
3181                 ibmvnic_send_crq(adapter, &crq);
3182         }
3183 }
3184
3185 static int pending_scrq(struct ibmvnic_adapter *adapter,
3186                         struct ibmvnic_sub_crq_queue *scrq)
3187 {
3188         union sub_crq *entry = &scrq->msgs[scrq->cur];
3189
3190         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
3191                 return 1;
3192         else
3193                 return 0;
3194 }
3195
3196 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3197                                         struct ibmvnic_sub_crq_queue *scrq)
3198 {
3199         union sub_crq *entry;
3200         unsigned long flags;
3201
3202         spin_lock_irqsave(&scrq->lock, flags);
3203         entry = &scrq->msgs[scrq->cur];
3204         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3205                 if (++scrq->cur == scrq->size)
3206                         scrq->cur = 0;
3207         } else {
3208                 entry = NULL;
3209         }
3210         spin_unlock_irqrestore(&scrq->lock, flags);
3211
3212         return entry;
3213 }
3214
3215 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3216 {
3217         struct ibmvnic_crq_queue *queue = &adapter->crq;
3218         union ibmvnic_crq *crq;
3219
3220         crq = &queue->msgs[queue->cur];
3221         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3222                 if (++queue->cur == queue->size)
3223                         queue->cur = 0;
3224         } else {
3225                 crq = NULL;
3226         }
3227
3228         return crq;
3229 }
3230
3231 static void print_subcrq_error(struct device *dev, int rc, const char *func)
3232 {
3233         switch (rc) {
3234         case H_PARAMETER:
3235                 dev_warn_ratelimited(dev,
3236                                      "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3237                                      func, rc);
3238                 break;
3239         case H_CLOSED:
3240                 dev_warn_ratelimited(dev,
3241                                      "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3242                                      func, rc);
3243                 break;
3244         default:
3245                 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3246                 break;
3247         }
3248 }
3249
3250 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3251                        union sub_crq *sub_crq)
3252 {
3253         unsigned int ua = adapter->vdev->unit_address;
3254         struct device *dev = &adapter->vdev->dev;
3255         u64 *u64_crq = (u64 *)sub_crq;
3256         int rc;
3257
3258         netdev_dbg(adapter->netdev,
3259                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3260                    (unsigned long int)cpu_to_be64(remote_handle),
3261                    (unsigned long int)cpu_to_be64(u64_crq[0]),
3262                    (unsigned long int)cpu_to_be64(u64_crq[1]),
3263                    (unsigned long int)cpu_to_be64(u64_crq[2]),
3264                    (unsigned long int)cpu_to_be64(u64_crq[3]));
3265
3266         /* Make sure the hypervisor sees the complete request */
3267         mb();
3268
3269         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3270                                 cpu_to_be64(remote_handle),
3271                                 cpu_to_be64(u64_crq[0]),
3272                                 cpu_to_be64(u64_crq[1]),
3273                                 cpu_to_be64(u64_crq[2]),
3274                                 cpu_to_be64(u64_crq[3]));
3275
3276         if (rc)
3277                 print_subcrq_error(dev, rc, __func__);
3278
3279         return rc;
3280 }
3281
3282 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3283                                 u64 remote_handle, u64 ioba, u64 num_entries)
3284 {
3285         unsigned int ua = adapter->vdev->unit_address;
3286         struct device *dev = &adapter->vdev->dev;
3287         int rc;
3288
3289         /* Make sure the hypervisor sees the complete request */
3290         mb();
3291         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3292                                 cpu_to_be64(remote_handle),
3293                                 ioba, num_entries);
3294
3295         if (rc)
3296                 print_subcrq_error(dev, rc, __func__);
3297
3298         return rc;
3299 }
3300
3301 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3302                             union ibmvnic_crq *crq)
3303 {
3304         unsigned int ua = adapter->vdev->unit_address;
3305         struct device *dev = &adapter->vdev->dev;
3306         u64 *u64_crq = (u64 *)crq;
3307         int rc;
3308
3309         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3310                    (unsigned long int)cpu_to_be64(u64_crq[0]),
3311                    (unsigned long int)cpu_to_be64(u64_crq[1]));
3312
3313         if (!adapter->crq.active &&
3314             crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3315                 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3316                 return -EINVAL;
3317         }
3318
3319         /* Make sure the hypervisor sees the complete request */
3320         mb();
3321
3322         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3323                                 cpu_to_be64(u64_crq[0]),
3324                                 cpu_to_be64(u64_crq[1]));
3325
3326         if (rc) {
3327                 if (rc == H_CLOSED) {
3328                         dev_warn(dev, "CRQ Queue closed\n");
3329                         if (adapter->resetting)
3330                                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3331                 }
3332
3333                 dev_warn(dev, "Send error (rc=%d)\n", rc);
3334         }
3335
3336         return rc;
3337 }
3338
3339 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3340 {
3341         union ibmvnic_crq crq;
3342
3343         memset(&crq, 0, sizeof(crq));
3344         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3345         crq.generic.cmd = IBMVNIC_CRQ_INIT;
3346         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3347
3348         return ibmvnic_send_crq(adapter, &crq);
3349 }
3350
3351 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3352 {
3353         union ibmvnic_crq crq;
3354
3355         memset(&crq, 0, sizeof(crq));
3356         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3357         crq.version_exchange.cmd = VERSION_EXCHANGE;
3358         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3359
3360         return ibmvnic_send_crq(adapter, &crq);
3361 }
3362
3363 struct vnic_login_client_data {
3364         u8      type;
3365         __be16  len;
3366         char    name[];
3367 } __packed;
3368
3369 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3370 {
3371         int len;
3372
3373         /* Calculate the amount of buffer space needed for the
3374          * vnic client data in the login buffer. There are four entries,
3375          * OS name, LPAR name, device name, and a null last entry.
3376          */
3377         len = 4 * sizeof(struct vnic_login_client_data);
3378         len += 6; /* "Linux" plus NULL */
3379         len += strlen(utsname()->nodename) + 1;
3380         len += strlen(adapter->netdev->name) + 1;
3381
3382         return len;
3383 }
3384
3385 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3386                                  struct vnic_login_client_data *vlcd)
3387 {
3388         const char *os_name = "Linux";
3389         int len;
3390
3391         /* Type 1 - LPAR OS */
3392         vlcd->type = 1;
3393         len = strlen(os_name) + 1;
3394         vlcd->len = cpu_to_be16(len);
3395         strncpy(vlcd->name, os_name, len);
3396         vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3397
3398         /* Type 2 - LPAR name */
3399         vlcd->type = 2;
3400         len = strlen(utsname()->nodename) + 1;
3401         vlcd->len = cpu_to_be16(len);
3402         strncpy(vlcd->name, utsname()->nodename, len);
3403         vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3404
3405         /* Type 3 - device name */
3406         vlcd->type = 3;
3407         len = strlen(adapter->netdev->name) + 1;
3408         vlcd->len = cpu_to_be16(len);
3409         strncpy(vlcd->name, adapter->netdev->name, len);
3410 }
3411
3412 static int send_login(struct ibmvnic_adapter *adapter)
3413 {
3414         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3415         struct ibmvnic_login_buffer *login_buffer;
3416         struct device *dev = &adapter->vdev->dev;
3417         dma_addr_t rsp_buffer_token;
3418         dma_addr_t buffer_token;
3419         size_t rsp_buffer_size;
3420         union ibmvnic_crq crq;
3421         size_t buffer_size;
3422         __be64 *tx_list_p;
3423         __be64 *rx_list_p;
3424         int client_data_len;
3425         struct vnic_login_client_data *vlcd;
3426         int i;
3427
3428         if (!adapter->tx_scrq || !adapter->rx_scrq) {
3429                 netdev_err(adapter->netdev,
3430                            "RX or TX queues are not allocated, device login failed\n");
3431                 return -1;
3432         }
3433
3434         release_login_rsp_buffer(adapter);
3435         client_data_len = vnic_client_data_len(adapter);
3436
3437         buffer_size =
3438             sizeof(struct ibmvnic_login_buffer) +
3439             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3440             client_data_len;
3441
3442         login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3443         if (!login_buffer)
3444                 goto buf_alloc_failed;
3445
3446         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3447                                       DMA_TO_DEVICE);
3448         if (dma_mapping_error(dev, buffer_token)) {
3449                 dev_err(dev, "Couldn't map login buffer\n");
3450                 goto buf_map_failed;
3451         }
3452
3453         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3454                           sizeof(u64) * adapter->req_tx_queues +
3455                           sizeof(u64) * adapter->req_rx_queues +
3456                           sizeof(u64) * adapter->req_rx_queues +
3457                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3458
3459         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3460         if (!login_rsp_buffer)
3461                 goto buf_rsp_alloc_failed;
3462
3463         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3464                                           rsp_buffer_size, DMA_FROM_DEVICE);
3465         if (dma_mapping_error(dev, rsp_buffer_token)) {
3466                 dev_err(dev, "Couldn't map login rsp buffer\n");
3467                 goto buf_rsp_map_failed;
3468         }
3469
3470         adapter->login_buf = login_buffer;
3471         adapter->login_buf_token = buffer_token;
3472         adapter->login_buf_sz = buffer_size;
3473         adapter->login_rsp_buf = login_rsp_buffer;
3474         adapter->login_rsp_buf_token = rsp_buffer_token;
3475         adapter->login_rsp_buf_sz = rsp_buffer_size;
3476
3477         login_buffer->len = cpu_to_be32(buffer_size);
3478         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3479         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3480         login_buffer->off_txcomp_subcrqs =
3481             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3482         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3483         login_buffer->off_rxcomp_subcrqs =
3484             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3485                         sizeof(u64) * adapter->req_tx_queues);
3486         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3487         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3488
3489         tx_list_p = (__be64 *)((char *)login_buffer +
3490                                       sizeof(struct ibmvnic_login_buffer));
3491         rx_list_p = (__be64 *)((char *)login_buffer +
3492                                       sizeof(struct ibmvnic_login_buffer) +
3493                                       sizeof(u64) * adapter->req_tx_queues);
3494
3495         for (i = 0; i < adapter->req_tx_queues; i++) {
3496                 if (adapter->tx_scrq[i]) {
3497                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3498                                                    crq_num);
3499                 }
3500         }
3501
3502         for (i = 0; i < adapter->req_rx_queues; i++) {
3503                 if (adapter->rx_scrq[i]) {
3504                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3505                                                    crq_num);
3506                 }
3507         }
3508
3509         /* Insert vNIC login client data */
3510         vlcd = (struct vnic_login_client_data *)
3511                 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3512         login_buffer->client_data_offset =
3513                         cpu_to_be32((char *)vlcd - (char *)login_buffer);
3514         login_buffer->client_data_len = cpu_to_be32(client_data_len);
3515
3516         vnic_add_client_data(adapter, vlcd);
3517
3518         netdev_dbg(adapter->netdev, "Login Buffer:\n");
3519         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3520                 netdev_dbg(adapter->netdev, "%016lx\n",
3521                            ((unsigned long int *)(adapter->login_buf))[i]);
3522         }
3523
3524         memset(&crq, 0, sizeof(crq));
3525         crq.login.first = IBMVNIC_CRQ_CMD;
3526         crq.login.cmd = LOGIN;
3527         crq.login.ioba = cpu_to_be32(buffer_token);
3528         crq.login.len = cpu_to_be32(buffer_size);
3529         ibmvnic_send_crq(adapter, &crq);
3530
3531         return 0;
3532
3533 buf_rsp_map_failed:
3534         kfree(login_rsp_buffer);
3535 buf_rsp_alloc_failed:
3536         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3537 buf_map_failed:
3538         kfree(login_buffer);
3539 buf_alloc_failed:
3540         return -1;
3541 }
3542
3543 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3544                             u32 len, u8 map_id)
3545 {
3546         union ibmvnic_crq crq;
3547
3548         memset(&crq, 0, sizeof(crq));
3549         crq.request_map.first = IBMVNIC_CRQ_CMD;
3550         crq.request_map.cmd = REQUEST_MAP;
3551         crq.request_map.map_id = map_id;
3552         crq.request_map.ioba = cpu_to_be32(addr);
3553         crq.request_map.len = cpu_to_be32(len);
3554         return ibmvnic_send_crq(adapter, &crq);
3555 }
3556
3557 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3558 {
3559         union ibmvnic_crq crq;
3560
3561         memset(&crq, 0, sizeof(crq));
3562         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3563         crq.request_unmap.cmd = REQUEST_UNMAP;
3564         crq.request_unmap.map_id = map_id;
3565         return ibmvnic_send_crq(adapter, &crq);
3566 }
3567
3568 static void send_map_query(struct ibmvnic_adapter *adapter)
3569 {
3570         union ibmvnic_crq crq;
3571
3572         memset(&crq, 0, sizeof(crq));
3573         crq.query_map.first = IBMVNIC_CRQ_CMD;
3574         crq.query_map.cmd = QUERY_MAP;
3575         ibmvnic_send_crq(adapter, &crq);
3576 }
3577
3578 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3579 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3580 {
3581         union ibmvnic_crq crq;
3582
3583         atomic_set(&adapter->running_cap_crqs, 0);
3584         memset(&crq, 0, sizeof(crq));
3585         crq.query_capability.first = IBMVNIC_CRQ_CMD;
3586         crq.query_capability.cmd = QUERY_CAPABILITY;
3587
3588         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3589         atomic_inc(&adapter->running_cap_crqs);
3590         ibmvnic_send_crq(adapter, &crq);
3591
3592         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3593         atomic_inc(&adapter->running_cap_crqs);
3594         ibmvnic_send_crq(adapter, &crq);
3595
3596         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3597         atomic_inc(&adapter->running_cap_crqs);
3598         ibmvnic_send_crq(adapter, &crq);
3599
3600         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3601         atomic_inc(&adapter->running_cap_crqs);
3602         ibmvnic_send_crq(adapter, &crq);
3603
3604         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3605         atomic_inc(&adapter->running_cap_crqs);
3606         ibmvnic_send_crq(adapter, &crq);
3607
3608         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3609         atomic_inc(&adapter->running_cap_crqs);
3610         ibmvnic_send_crq(adapter, &crq);
3611
3612         crq.query_capability.capability =
3613             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3614         atomic_inc(&adapter->running_cap_crqs);
3615         ibmvnic_send_crq(adapter, &crq);
3616
3617         crq.query_capability.capability =
3618             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3619         atomic_inc(&adapter->running_cap_crqs);
3620         ibmvnic_send_crq(adapter, &crq);
3621
3622         crq.query_capability.capability =
3623             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3624         atomic_inc(&adapter->running_cap_crqs);
3625         ibmvnic_send_crq(adapter, &crq);
3626
3627         crq.query_capability.capability =
3628             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3629         atomic_inc(&adapter->running_cap_crqs);
3630         ibmvnic_send_crq(adapter, &crq);
3631
3632         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3633         atomic_inc(&adapter->running_cap_crqs);
3634         ibmvnic_send_crq(adapter, &crq);
3635
3636         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3637         atomic_inc(&adapter->running_cap_crqs);
3638         ibmvnic_send_crq(adapter, &crq);
3639
3640         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3641         atomic_inc(&adapter->running_cap_crqs);
3642         ibmvnic_send_crq(adapter, &crq);
3643
3644         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3645         atomic_inc(&adapter->running_cap_crqs);
3646         ibmvnic_send_crq(adapter, &crq);
3647
3648         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3649         atomic_inc(&adapter->running_cap_crqs);
3650         ibmvnic_send_crq(adapter, &crq);
3651
3652         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3653         atomic_inc(&adapter->running_cap_crqs);
3654         ibmvnic_send_crq(adapter, &crq);
3655
3656         crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3657         atomic_inc(&adapter->running_cap_crqs);
3658         ibmvnic_send_crq(adapter, &crq);
3659
3660         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3661         atomic_inc(&adapter->running_cap_crqs);
3662         ibmvnic_send_crq(adapter, &crq);
3663
3664         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3665         atomic_inc(&adapter->running_cap_crqs);
3666         ibmvnic_send_crq(adapter, &crq);
3667
3668         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3669         atomic_inc(&adapter->running_cap_crqs);
3670         ibmvnic_send_crq(adapter, &crq);
3671
3672         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3673         atomic_inc(&adapter->running_cap_crqs);
3674         ibmvnic_send_crq(adapter, &crq);
3675
3676         crq.query_capability.capability =
3677                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3678         atomic_inc(&adapter->running_cap_crqs);
3679         ibmvnic_send_crq(adapter, &crq);
3680
3681         crq.query_capability.capability =
3682                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3683         atomic_inc(&adapter->running_cap_crqs);
3684         ibmvnic_send_crq(adapter, &crq);
3685
3686         crq.query_capability.capability =
3687                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3688         atomic_inc(&adapter->running_cap_crqs);
3689         ibmvnic_send_crq(adapter, &crq);
3690
3691         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3692         atomic_inc(&adapter->running_cap_crqs);
3693         ibmvnic_send_crq(adapter, &crq);
3694 }
3695
3696 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3697                                 struct ibmvnic_adapter *adapter)
3698 {
3699         struct device *dev = &adapter->vdev->dev;
3700
3701         if (crq->get_vpd_size_rsp.rc.code) {
3702                 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3703                         crq->get_vpd_size_rsp.rc.code);
3704                 complete(&adapter->fw_done);
3705                 return;
3706         }
3707
3708         adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3709         complete(&adapter->fw_done);
3710 }
3711
3712 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3713                            struct ibmvnic_adapter *adapter)
3714 {
3715         struct device *dev = &adapter->vdev->dev;
3716         unsigned char *substr = NULL;
3717         u8 fw_level_len = 0;
3718
3719         memset(adapter->fw_version, 0, 32);
3720
3721         dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3722                          DMA_FROM_DEVICE);
3723
3724         if (crq->get_vpd_rsp.rc.code) {
3725                 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3726                         crq->get_vpd_rsp.rc.code);
3727                 goto complete;
3728         }
3729
3730         /* get the position of the firmware version info
3731          * located after the ASCII 'RM' substring in the buffer
3732          */
3733         substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3734         if (!substr) {
3735                 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3736                 goto complete;
3737         }
3738
3739         /* get length of firmware level ASCII substring */
3740         if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3741                 fw_level_len = *(substr + 2);
3742         } else {
3743                 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3744                 goto complete;
3745         }
3746
3747         /* copy firmware version string from vpd into adapter */
3748         if ((substr + 3 + fw_level_len) <
3749             (adapter->vpd->buff + adapter->vpd->len)) {
3750                 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3751         } else {
3752                 dev_info(dev, "FW substr extrapolated VPD buff\n");
3753         }
3754
3755 complete:
3756         if (adapter->fw_version[0] == '\0')
3757                 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3758         complete(&adapter->fw_done);
3759 }
3760
3761 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3762 {
3763         struct device *dev = &adapter->vdev->dev;
3764         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3765         union ibmvnic_crq crq;
3766         int i;
3767
3768         dma_unmap_single(dev, adapter->ip_offload_tok,
3769                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3770
3771         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3772         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3773                 netdev_dbg(adapter->netdev, "%016lx\n",
3774                            ((unsigned long int *)(buf))[i]);
3775
3776         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3777         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3778         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3779                    buf->tcp_ipv4_chksum);
3780         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3781                    buf->tcp_ipv6_chksum);
3782         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3783                    buf->udp_ipv4_chksum);
3784         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3785                    buf->udp_ipv6_chksum);
3786         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3787                    buf->large_tx_ipv4);
3788         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3789                    buf->large_tx_ipv6);
3790         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3791                    buf->large_rx_ipv4);
3792         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3793                    buf->large_rx_ipv6);
3794         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3795                    buf->max_ipv4_header_size);
3796         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3797                    buf->max_ipv6_header_size);
3798         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3799                    buf->max_tcp_header_size);
3800         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3801                    buf->max_udp_header_size);
3802         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3803                    buf->max_large_tx_size);
3804         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3805                    buf->max_large_rx_size);
3806         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3807                    buf->ipv6_extension_header);
3808         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3809                    buf->tcp_pseudosum_req);
3810         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3811                    buf->num_ipv6_ext_headers);
3812         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3813                    buf->off_ipv6_ext_headers);
3814
3815         adapter->ip_offload_ctrl_tok =
3816             dma_map_single(dev, &adapter->ip_offload_ctrl,
3817                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3818
3819         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3820                 dev_err(dev, "Couldn't map ip offload control buffer\n");
3821                 return;
3822         }
3823
3824         adapter->ip_offload_ctrl.len =
3825             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3826         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3827         adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3828         adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3829         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3830         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3831         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3832         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3833         adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3834         adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3835
3836         /* large_rx disabled for now, additional features needed */
3837         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3838         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3839
3840         adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3841
3842         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3843                 adapter->netdev->features |= NETIF_F_IP_CSUM;
3844
3845         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3846                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3847
3848         if ((adapter->netdev->features &
3849             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3850                 adapter->netdev->features |= NETIF_F_RXCSUM;
3851
3852         if (buf->large_tx_ipv4)
3853                 adapter->netdev->features |= NETIF_F_TSO;
3854         if (buf->large_tx_ipv6)
3855                 adapter->netdev->features |= NETIF_F_TSO6;
3856
3857         adapter->netdev->hw_features |= adapter->netdev->features;
3858
3859         memset(&crq, 0, sizeof(crq));
3860         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3861         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3862         crq.control_ip_offload.len =
3863             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3864         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3865         ibmvnic_send_crq(adapter, &crq);
3866 }
3867
3868 static const char *ibmvnic_fw_err_cause(u16 cause)
3869 {
3870         switch (cause) {
3871         case ADAPTER_PROBLEM:
3872                 return "adapter problem";
3873         case BUS_PROBLEM:
3874                 return "bus problem";
3875         case FW_PROBLEM:
3876                 return "firmware problem";
3877         case DD_PROBLEM:
3878                 return "device driver problem";
3879         case EEH_RECOVERY:
3880                 return "EEH recovery";
3881         case FW_UPDATED:
3882                 return "firmware updated";
3883         case LOW_MEMORY:
3884                 return "low Memory";
3885         default:
3886                 return "unknown";
3887         }
3888 }
3889
3890 static void handle_error_indication(union ibmvnic_crq *crq,
3891                                     struct ibmvnic_adapter *adapter)
3892 {
3893         struct device *dev = &adapter->vdev->dev;
3894         u16 cause;
3895
3896         cause = be16_to_cpu(crq->error_indication.error_cause);
3897
3898         dev_warn_ratelimited(dev,
3899                              "Firmware reports %serror, cause: %s. Starting recovery...\n",
3900                              crq->error_indication.flags
3901                                 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3902                              ibmvnic_fw_err_cause(cause));
3903
3904         if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3905                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3906         else
3907                 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3908 }
3909
3910 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3911                                  struct ibmvnic_adapter *adapter)
3912 {
3913         struct net_device *netdev = adapter->netdev;
3914         struct device *dev = &adapter->vdev->dev;
3915         long rc;
3916
3917         rc = crq->change_mac_addr_rsp.rc.code;
3918         if (rc) {
3919                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3920                 goto out;
3921         }
3922         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3923                ETH_ALEN);
3924 out:
3925         complete(&adapter->fw_done);
3926         return rc;
3927 }
3928
3929 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3930                                    struct ibmvnic_adapter *adapter)
3931 {
3932         struct device *dev = &adapter->vdev->dev;
3933         u64 *req_value;
3934         char *name;
3935
3936         atomic_dec(&adapter->running_cap_crqs);
3937         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3938         case REQ_TX_QUEUES:
3939                 req_value = &adapter->req_tx_queues;
3940                 name = "tx";
3941                 break;
3942         case REQ_RX_QUEUES:
3943                 req_value = &adapter->req_rx_queues;
3944                 name = "rx";
3945                 break;
3946         case REQ_RX_ADD_QUEUES:
3947                 req_value = &adapter->req_rx_add_queues;
3948                 name = "rx_add";
3949                 break;
3950         case REQ_TX_ENTRIES_PER_SUBCRQ:
3951                 req_value = &adapter->req_tx_entries_per_subcrq;
3952                 name = "tx_entries_per_subcrq";
3953                 break;
3954         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3955                 req_value = &adapter->req_rx_add_entries_per_subcrq;
3956                 name = "rx_add_entries_per_subcrq";
3957                 break;
3958         case REQ_MTU:
3959                 req_value = &adapter->req_mtu;
3960                 name = "mtu";
3961                 break;
3962         case PROMISC_REQUESTED:
3963                 req_value = &adapter->promisc;
3964                 name = "promisc";
3965                 break;
3966         default:
3967                 dev_err(dev, "Got invalid cap request rsp %d\n",
3968                         crq->request_capability.capability);
3969                 return;
3970         }
3971
3972         switch (crq->request_capability_rsp.rc.code) {
3973         case SUCCESS:
3974                 break;
3975         case PARTIALSUCCESS:
3976                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3977                          *req_value,
3978                          (long int)be64_to_cpu(crq->request_capability_rsp.
3979                                                number), name);
3980
3981                 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3982                     REQ_MTU) {
3983                         pr_err("mtu of %llu is not supported. Reverting.\n",
3984                                *req_value);
3985                         *req_value = adapter->fallback.mtu;
3986                 } else {
3987                         *req_value =
3988                                 be64_to_cpu(crq->request_capability_rsp.number);
3989                 }
3990
3991                 ibmvnic_send_req_caps(adapter, 1);
3992                 return;
3993         default:
3994                 dev_err(dev, "Error %d in request cap rsp\n",
3995                         crq->request_capability_rsp.rc.code);
3996                 return;
3997         }
3998
3999         /* Done receiving requested capabilities, query IP offload support */
4000         if (atomic_read(&adapter->running_cap_crqs) == 0) {
4001                 union ibmvnic_crq newcrq;
4002                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
4003                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
4004                     &adapter->ip_offload_buf;
4005
4006                 adapter->wait_capability = false;
4007                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
4008                                                          buf_sz,
4009                                                          DMA_FROM_DEVICE);
4010
4011                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
4012                         if (!firmware_has_feature(FW_FEATURE_CMO))
4013                                 dev_err(dev, "Couldn't map offload buffer\n");
4014                         return;
4015                 }
4016
4017                 memset(&newcrq, 0, sizeof(newcrq));
4018                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
4019                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
4020                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
4021                 newcrq.query_ip_offload.ioba =
4022                     cpu_to_be32(adapter->ip_offload_tok);
4023
4024                 ibmvnic_send_crq(adapter, &newcrq);
4025         }
4026 }
4027
4028 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
4029                             struct ibmvnic_adapter *adapter)
4030 {
4031         struct device *dev = &adapter->vdev->dev;
4032         struct net_device *netdev = adapter->netdev;
4033         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
4034         struct ibmvnic_login_buffer *login = adapter->login_buf;
4035         int i;
4036
4037         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
4038                          DMA_TO_DEVICE);
4039         dma_unmap_single(dev, adapter->login_rsp_buf_token,
4040                          adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
4041
4042         /* If the number of queues requested can't be allocated by the
4043          * server, the login response will return with code 1. We will need
4044          * to resend the login buffer with fewer queues requested.
4045          */
4046         if (login_rsp_crq->generic.rc.code) {
4047                 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
4048                 complete(&adapter->init_done);
4049                 return 0;
4050         }
4051
4052         netdev->mtu = adapter->req_mtu - ETH_HLEN;
4053
4054         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4055         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4056                 netdev_dbg(adapter->netdev, "%016lx\n",
4057                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4058         }
4059
4060         /* Sanity checks */
4061         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4062             (be32_to_cpu(login->num_rxcomp_subcrqs) *
4063              adapter->req_rx_add_queues !=
4064              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4065                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4066                 ibmvnic_remove(adapter->vdev);
4067                 return -EIO;
4068         }
4069         release_login_buffer(adapter);
4070         complete(&adapter->init_done);
4071
4072         return 0;
4073 }
4074
4075 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4076                                      struct ibmvnic_adapter *adapter)
4077 {
4078         struct device *dev = &adapter->vdev->dev;
4079         long rc;
4080
4081         rc = crq->request_unmap_rsp.rc.code;
4082         if (rc)
4083                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4084 }
4085
4086 static void handle_query_map_rsp(union ibmvnic_crq *crq,
4087                                  struct ibmvnic_adapter *adapter)
4088 {
4089         struct net_device *netdev = adapter->netdev;
4090         struct device *dev = &adapter->vdev->dev;
4091         long rc;
4092
4093         rc = crq->query_map_rsp.rc.code;
4094         if (rc) {
4095                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4096                 return;
4097         }
4098         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4099                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4100                    crq->query_map_rsp.free_pages);
4101 }
4102
4103 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4104                                  struct ibmvnic_adapter *adapter)
4105 {
4106         struct net_device *netdev = adapter->netdev;
4107         struct device *dev = &adapter->vdev->dev;
4108         long rc;
4109
4110         atomic_dec(&adapter->running_cap_crqs);
4111         netdev_dbg(netdev, "Outstanding queries: %d\n",
4112                    atomic_read(&adapter->running_cap_crqs));
4113         rc = crq->query_capability.rc.code;
4114         if (rc) {
4115                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4116                 goto out;
4117         }
4118
4119         switch (be16_to_cpu(crq->query_capability.capability)) {
4120         case MIN_TX_QUEUES:
4121                 adapter->min_tx_queues =
4122                     be64_to_cpu(crq->query_capability.number);
4123                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4124                            adapter->min_tx_queues);
4125                 break;
4126         case MIN_RX_QUEUES:
4127                 adapter->min_rx_queues =
4128                     be64_to_cpu(crq->query_capability.number);
4129                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4130                            adapter->min_rx_queues);
4131                 break;
4132         case MIN_RX_ADD_QUEUES:
4133                 adapter->min_rx_add_queues =
4134                     be64_to_cpu(crq->query_capability.number);
4135                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4136                            adapter->min_rx_add_queues);
4137                 break;
4138         case MAX_TX_QUEUES:
4139                 adapter->max_tx_queues =
4140                     be64_to_cpu(crq->query_capability.number);
4141                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4142                            adapter->max_tx_queues);
4143                 break;
4144         case MAX_RX_QUEUES:
4145                 adapter->max_rx_queues =
4146                     be64_to_cpu(crq->query_capability.number);
4147                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4148                            adapter->max_rx_queues);
4149                 break;
4150         case MAX_RX_ADD_QUEUES:
4151                 adapter->max_rx_add_queues =
4152                     be64_to_cpu(crq->query_capability.number);
4153                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4154                            adapter->max_rx_add_queues);
4155                 break;
4156         case MIN_TX_ENTRIES_PER_SUBCRQ:
4157                 adapter->min_tx_entries_per_subcrq =
4158                     be64_to_cpu(crq->query_capability.number);
4159                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4160                            adapter->min_tx_entries_per_subcrq);
4161                 break;
4162         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4163                 adapter->min_rx_add_entries_per_subcrq =
4164                     be64_to_cpu(crq->query_capability.number);
4165                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4166                            adapter->min_rx_add_entries_per_subcrq);
4167                 break;
4168         case MAX_TX_ENTRIES_PER_SUBCRQ:
4169                 adapter->max_tx_entries_per_subcrq =
4170                     be64_to_cpu(crq->query_capability.number);
4171                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4172                            adapter->max_tx_entries_per_subcrq);
4173                 break;
4174         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4175                 adapter->max_rx_add_entries_per_subcrq =
4176                     be64_to_cpu(crq->query_capability.number);
4177                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4178                            adapter->max_rx_add_entries_per_subcrq);
4179                 break;
4180         case TCP_IP_OFFLOAD:
4181                 adapter->tcp_ip_offload =
4182                     be64_to_cpu(crq->query_capability.number);
4183                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4184                            adapter->tcp_ip_offload);
4185                 break;
4186         case PROMISC_SUPPORTED:
4187                 adapter->promisc_supported =
4188                     be64_to_cpu(crq->query_capability.number);
4189                 netdev_dbg(netdev, "promisc_supported = %lld\n",
4190                            adapter->promisc_supported);
4191                 break;
4192         case MIN_MTU:
4193                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4194                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4195                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4196                 break;
4197         case MAX_MTU:
4198                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4199                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4200                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4201                 break;
4202         case MAX_MULTICAST_FILTERS:
4203                 adapter->max_multicast_filters =
4204                     be64_to_cpu(crq->query_capability.number);
4205                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4206                            adapter->max_multicast_filters);
4207                 break;
4208         case VLAN_HEADER_INSERTION:
4209                 adapter->vlan_header_insertion =
4210                     be64_to_cpu(crq->query_capability.number);
4211                 if (adapter->vlan_header_insertion)
4212                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4213                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4214                            adapter->vlan_header_insertion);
4215                 break;
4216         case RX_VLAN_HEADER_INSERTION:
4217                 adapter->rx_vlan_header_insertion =
4218                     be64_to_cpu(crq->query_capability.number);
4219                 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4220                            adapter->rx_vlan_header_insertion);
4221                 break;
4222         case MAX_TX_SG_ENTRIES:
4223                 adapter->max_tx_sg_entries =
4224                     be64_to_cpu(crq->query_capability.number);
4225                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4226                            adapter->max_tx_sg_entries);
4227                 break;
4228         case RX_SG_SUPPORTED:
4229                 adapter->rx_sg_supported =
4230                     be64_to_cpu(crq->query_capability.number);
4231                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4232                            adapter->rx_sg_supported);
4233                 break;
4234         case OPT_TX_COMP_SUB_QUEUES:
4235                 adapter->opt_tx_comp_sub_queues =
4236                     be64_to_cpu(crq->query_capability.number);
4237                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4238                            adapter->opt_tx_comp_sub_queues);
4239                 break;
4240         case OPT_RX_COMP_QUEUES:
4241                 adapter->opt_rx_comp_queues =
4242                     be64_to_cpu(crq->query_capability.number);
4243                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4244                            adapter->opt_rx_comp_queues);
4245                 break;
4246         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4247                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4248                     be64_to_cpu(crq->query_capability.number);
4249                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4250                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
4251                 break;
4252         case OPT_TX_ENTRIES_PER_SUBCRQ:
4253                 adapter->opt_tx_entries_per_subcrq =
4254                     be64_to_cpu(crq->query_capability.number);
4255                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4256                            adapter->opt_tx_entries_per_subcrq);
4257                 break;
4258         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4259                 adapter->opt_rxba_entries_per_subcrq =
4260                     be64_to_cpu(crq->query_capability.number);
4261                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4262                            adapter->opt_rxba_entries_per_subcrq);
4263                 break;
4264         case TX_RX_DESC_REQ:
4265                 adapter->tx_rx_desc_req = crq->query_capability.number;
4266                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4267                            adapter->tx_rx_desc_req);
4268                 break;
4269
4270         default:
4271                 netdev_err(netdev, "Got invalid cap rsp %d\n",
4272                            crq->query_capability.capability);
4273         }
4274
4275 out:
4276         if (atomic_read(&adapter->running_cap_crqs) == 0) {
4277                 adapter->wait_capability = false;
4278                 ibmvnic_send_req_caps(adapter, 0);
4279         }
4280 }
4281
4282 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4283                                struct ibmvnic_adapter *adapter)
4284 {
4285         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4286         struct net_device *netdev = adapter->netdev;
4287         struct device *dev = &adapter->vdev->dev;
4288         u64 *u64_crq = (u64 *)crq;
4289         long rc;
4290
4291         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4292                    (unsigned long int)cpu_to_be64(u64_crq[0]),
4293                    (unsigned long int)cpu_to_be64(u64_crq[1]));
4294         switch (gen_crq->first) {
4295         case IBMVNIC_CRQ_INIT_RSP:
4296                 switch (gen_crq->cmd) {
4297                 case IBMVNIC_CRQ_INIT:
4298                         dev_info(dev, "Partner initialized\n");
4299                         adapter->from_passive_init = true;
4300                         adapter->failover_pending = false;
4301                         if (!completion_done(&adapter->init_done)) {
4302                                 complete(&adapter->init_done);
4303                                 adapter->init_done_rc = -EIO;
4304                         }
4305                         ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4306                         break;
4307                 case IBMVNIC_CRQ_INIT_COMPLETE:
4308                         dev_info(dev, "Partner initialization complete\n");
4309                         adapter->crq.active = true;
4310                         send_version_xchg(adapter);
4311                         break;
4312                 default:
4313                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4314                 }
4315                 return;
4316         case IBMVNIC_CRQ_XPORT_EVENT:
4317                 netif_carrier_off(netdev);
4318                 adapter->crq.active = false;
4319                 if (adapter->resetting)
4320                         adapter->force_reset_recovery = true;
4321                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4322                         dev_info(dev, "Migrated, re-enabling adapter\n");
4323                         ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4324                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4325                         dev_info(dev, "Backing device failover detected\n");
4326                         adapter->failover_pending = true;
4327                 } else {
4328                         /* The adapter lost the connection */
4329                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4330                                 gen_crq->cmd);
4331                         ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4332                 }
4333                 return;
4334         case IBMVNIC_CRQ_CMD_RSP:
4335                 break;
4336         default:
4337                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4338                         gen_crq->first);
4339                 return;
4340         }
4341
4342         switch (gen_crq->cmd) {
4343         case VERSION_EXCHANGE_RSP:
4344                 rc = crq->version_exchange_rsp.rc.code;
4345                 if (rc) {
4346                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4347                         break;
4348                 }
4349                 dev_info(dev, "Partner protocol version is %d\n",
4350                          crq->version_exchange_rsp.version);
4351                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4352                     ibmvnic_version)
4353                         ibmvnic_version =
4354                             be16_to_cpu(crq->version_exchange_rsp.version);
4355                 send_cap_queries(adapter);
4356                 break;
4357         case QUERY_CAPABILITY_RSP:
4358                 handle_query_cap_rsp(crq, adapter);
4359                 break;
4360         case QUERY_MAP_RSP:
4361                 handle_query_map_rsp(crq, adapter);
4362                 break;
4363         case REQUEST_MAP_RSP:
4364                 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4365                 complete(&adapter->fw_done);
4366                 break;
4367         case REQUEST_UNMAP_RSP:
4368                 handle_request_unmap_rsp(crq, adapter);
4369                 break;
4370         case REQUEST_CAPABILITY_RSP:
4371                 handle_request_cap_rsp(crq, adapter);
4372                 break;
4373         case LOGIN_RSP:
4374                 netdev_dbg(netdev, "Got Login Response\n");
4375                 handle_login_rsp(crq, adapter);
4376                 break;
4377         case LOGICAL_LINK_STATE_RSP:
4378                 netdev_dbg(netdev,
4379                            "Got Logical Link State Response, state: %d rc: %d\n",
4380                            crq->logical_link_state_rsp.link_state,
4381                            crq->logical_link_state_rsp.rc.code);
4382                 adapter->logical_link_state =
4383                     crq->logical_link_state_rsp.link_state;
4384                 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4385                 complete(&adapter->init_done);
4386                 break;
4387         case LINK_STATE_INDICATION:
4388                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4389                 adapter->phys_link_state =
4390                     crq->link_state_indication.phys_link_state;
4391                 adapter->logical_link_state =
4392                     crq->link_state_indication.logical_link_state;
4393                 break;
4394         case CHANGE_MAC_ADDR_RSP:
4395                 netdev_dbg(netdev, "Got MAC address change Response\n");
4396                 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4397                 break;
4398         case ERROR_INDICATION:
4399                 netdev_dbg(netdev, "Got Error Indication\n");
4400                 handle_error_indication(crq, adapter);
4401                 break;
4402         case REQUEST_STATISTICS_RSP:
4403                 netdev_dbg(netdev, "Got Statistics Response\n");
4404                 complete(&adapter->stats_done);
4405                 break;
4406         case QUERY_IP_OFFLOAD_RSP:
4407                 netdev_dbg(netdev, "Got Query IP offload Response\n");
4408                 handle_query_ip_offload_rsp(adapter);
4409                 break;
4410         case MULTICAST_CTRL_RSP:
4411                 netdev_dbg(netdev, "Got multicast control Response\n");
4412                 break;
4413         case CONTROL_IP_OFFLOAD_RSP:
4414                 netdev_dbg(netdev, "Got Control IP offload Response\n");
4415                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4416                                  sizeof(adapter->ip_offload_ctrl),
4417                                  DMA_TO_DEVICE);
4418                 complete(&adapter->init_done);
4419                 break;
4420         case COLLECT_FW_TRACE_RSP:
4421                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4422                 complete(&adapter->fw_done);
4423                 break;
4424         case GET_VPD_SIZE_RSP:
4425                 handle_vpd_size_rsp(crq, adapter);
4426                 break;
4427         case GET_VPD_RSP:
4428                 handle_vpd_rsp(crq, adapter);
4429                 break;
4430         default:
4431                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4432                            gen_crq->cmd);
4433         }
4434 }
4435
4436 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4437 {
4438         struct ibmvnic_adapter *adapter = instance;
4439
4440         tasklet_schedule(&adapter->tasklet);
4441         return IRQ_HANDLED;
4442 }
4443
4444 static void ibmvnic_tasklet(void *data)
4445 {
4446         struct ibmvnic_adapter *adapter = data;
4447         struct ibmvnic_crq_queue *queue = &adapter->crq;
4448         union ibmvnic_crq *crq;
4449         unsigned long flags;
4450         bool done = false;
4451
4452         spin_lock_irqsave(&queue->lock, flags);
4453         while (!done) {
4454                 /* Pull all the valid messages off the CRQ */
4455                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4456                         ibmvnic_handle_crq(crq, adapter);
4457                         crq->generic.first = 0;
4458                 }
4459
4460                 /* remain in tasklet until all
4461                  * capabilities responses are received
4462                  */
4463                 if (!adapter->wait_capability)
4464                         done = true;
4465         }
4466         /* if capabilities CRQ's were sent in this tasklet, the following
4467          * tasklet must wait until all responses are received
4468          */
4469         if (atomic_read(&adapter->running_cap_crqs) != 0)
4470                 adapter->wait_capability = true;
4471         spin_unlock_irqrestore(&queue->lock, flags);
4472 }
4473
4474 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4475 {
4476         struct vio_dev *vdev = adapter->vdev;
4477         int rc;
4478
4479         do {
4480                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4481         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4482
4483         if (rc)
4484                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4485
4486         return rc;
4487 }
4488
4489 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4490 {
4491         struct ibmvnic_crq_queue *crq = &adapter->crq;
4492         struct device *dev = &adapter->vdev->dev;
4493         struct vio_dev *vdev = adapter->vdev;
4494         int rc;
4495
4496         /* Close the CRQ */
4497         do {
4498                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4499         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4500
4501         /* Clean out the queue */
4502         memset(crq->msgs, 0, PAGE_SIZE);
4503         crq->cur = 0;
4504         crq->active = false;
4505
4506         /* And re-open it again */
4507         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4508                                 crq->msg_token, PAGE_SIZE);
4509
4510         if (rc == H_CLOSED)
4511                 /* Adapter is good, but other end is not ready */
4512                 dev_warn(dev, "Partner adapter not ready\n");
4513         else if (rc != 0)
4514                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4515
4516         return rc;
4517 }
4518
4519 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4520 {
4521         struct ibmvnic_crq_queue *crq = &adapter->crq;
4522         struct vio_dev *vdev = adapter->vdev;
4523         long rc;
4524
4525         if (!crq->msgs)
4526                 return;
4527
4528         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4529         free_irq(vdev->irq, adapter);
4530         tasklet_kill(&adapter->tasklet);
4531         do {
4532                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4533         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4534
4535         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4536                          DMA_BIDIRECTIONAL);
4537         free_page((unsigned long)crq->msgs);
4538         crq->msgs = NULL;
4539         crq->active = false;
4540 }
4541
4542 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4543 {
4544         struct ibmvnic_crq_queue *crq = &adapter->crq;
4545         struct device *dev = &adapter->vdev->dev;
4546         struct vio_dev *vdev = adapter->vdev;
4547         int rc, retrc = -ENOMEM;
4548
4549         if (crq->msgs)
4550                 return 0;
4551
4552         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4553         /* Should we allocate more than one page? */
4554
4555         if (!crq->msgs)
4556                 return -ENOMEM;
4557
4558         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4559         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4560                                         DMA_BIDIRECTIONAL);
4561         if (dma_mapping_error(dev, crq->msg_token))
4562                 goto map_failed;
4563
4564         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4565                                 crq->msg_token, PAGE_SIZE);
4566
4567         if (rc == H_RESOURCE)
4568                 /* maybe kexecing and resource is busy. try a reset */
4569                 rc = ibmvnic_reset_crq(adapter);
4570         retrc = rc;
4571
4572         if (rc == H_CLOSED) {
4573                 dev_warn(dev, "Partner adapter not ready\n");
4574         } else if (rc) {
4575                 dev_warn(dev, "Error %d opening adapter\n", rc);
4576                 goto reg_crq_failed;
4577         }
4578
4579         retrc = 0;
4580
4581         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4582                      (unsigned long)adapter);
4583
4584         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4585         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4586                          adapter);
4587         if (rc) {
4588                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4589                         vdev->irq, rc);
4590                 goto req_irq_failed;
4591         }
4592
4593         rc = vio_enable_interrupts(vdev);
4594         if (rc) {
4595                 dev_err(dev, "Error %d enabling interrupts\n", rc);
4596                 goto req_irq_failed;
4597         }
4598
4599         crq->cur = 0;
4600         spin_lock_init(&crq->lock);
4601
4602         return retrc;
4603
4604 req_irq_failed:
4605         tasklet_kill(&adapter->tasklet);
4606         do {
4607                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4608         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4609 reg_crq_failed:
4610         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4611 map_failed:
4612         free_page((unsigned long)crq->msgs);
4613         crq->msgs = NULL;
4614         return retrc;
4615 }
4616
4617 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter)
4618 {
4619         struct device *dev = &adapter->vdev->dev;
4620         unsigned long timeout = msecs_to_jiffies(30000);
4621         u64 old_num_rx_queues, old_num_tx_queues;
4622         int rc;
4623
4624         adapter->from_passive_init = false;
4625
4626         old_num_rx_queues = adapter->req_rx_queues;
4627         old_num_tx_queues = adapter->req_tx_queues;
4628
4629         reinit_completion(&adapter->init_done);
4630         adapter->init_done_rc = 0;
4631         ibmvnic_send_crq_init(adapter);
4632         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4633                 dev_err(dev, "Initialization sequence timed out\n");
4634                 return -1;
4635         }
4636
4637         if (adapter->init_done_rc) {
4638                 release_crq_queue(adapter);
4639                 return adapter->init_done_rc;
4640         }
4641
4642         if (adapter->from_passive_init) {
4643                 adapter->state = VNIC_OPEN;
4644                 adapter->from_passive_init = false;
4645                 return -1;
4646         }
4647
4648         if (adapter->resetting && !adapter->wait_for_reset &&
4649             adapter->reset_reason != VNIC_RESET_MOBILITY) {
4650                 if (adapter->req_rx_queues != old_num_rx_queues ||
4651                     adapter->req_tx_queues != old_num_tx_queues) {
4652                         release_sub_crqs(adapter, 0);
4653                         rc = init_sub_crqs(adapter);
4654                 } else {
4655                         rc = reset_sub_crq_queues(adapter);
4656                 }
4657         } else {
4658                 rc = init_sub_crqs(adapter);
4659         }
4660
4661         if (rc) {
4662                 dev_err(dev, "Initialization of sub crqs failed\n");
4663                 release_crq_queue(adapter);
4664                 return rc;
4665         }
4666
4667         rc = init_sub_crq_irqs(adapter);
4668         if (rc) {
4669                 dev_err(dev, "Failed to initialize sub crq irqs\n");
4670                 release_crq_queue(adapter);
4671         }
4672
4673         return rc;
4674 }
4675
4676 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4677 {
4678         struct device *dev = &adapter->vdev->dev;
4679         unsigned long timeout = msecs_to_jiffies(30000);
4680         int rc;
4681
4682         adapter->from_passive_init = false;
4683
4684         adapter->init_done_rc = 0;
4685         ibmvnic_send_crq_init(adapter);
4686         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4687                 dev_err(dev, "Initialization sequence timed out\n");
4688                 return -1;
4689         }
4690
4691         if (adapter->init_done_rc) {
4692                 release_crq_queue(adapter);
4693                 return adapter->init_done_rc;
4694         }
4695
4696         if (adapter->from_passive_init) {
4697                 adapter->state = VNIC_OPEN;
4698                 adapter->from_passive_init = false;
4699                 return -1;
4700         }
4701
4702         rc = init_sub_crqs(adapter);
4703         if (rc) {
4704                 dev_err(dev, "Initialization of sub crqs failed\n");
4705                 release_crq_queue(adapter);
4706                 return rc;
4707         }
4708
4709         rc = init_sub_crq_irqs(adapter);
4710         if (rc) {
4711                 dev_err(dev, "Failed to initialize sub crq irqs\n");
4712                 release_crq_queue(adapter);
4713         }
4714
4715         return rc;
4716 }
4717
4718 static struct device_attribute dev_attr_failover;
4719
4720 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4721 {
4722         struct ibmvnic_adapter *adapter;
4723         struct net_device *netdev;
4724         unsigned char *mac_addr_p;
4725         int rc;
4726
4727         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4728                 dev->unit_address);
4729
4730         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4731                                                         VETH_MAC_ADDR, NULL);
4732         if (!mac_addr_p) {
4733                 dev_err(&dev->dev,
4734                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4735                         __FILE__, __LINE__);
4736                 return 0;
4737         }
4738
4739         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4740                                    IBMVNIC_MAX_QUEUES);
4741         if (!netdev)
4742                 return -ENOMEM;
4743
4744         adapter = netdev_priv(netdev);
4745         adapter->state = VNIC_PROBING;
4746         dev_set_drvdata(&dev->dev, netdev);
4747         adapter->vdev = dev;
4748         adapter->netdev = netdev;
4749
4750         ether_addr_copy(adapter->mac_addr, mac_addr_p);
4751         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4752         netdev->irq = dev->irq;
4753         netdev->netdev_ops = &ibmvnic_netdev_ops;
4754         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4755         SET_NETDEV_DEV(netdev, &dev->dev);
4756
4757         spin_lock_init(&adapter->stats_lock);
4758
4759         INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4760         INIT_LIST_HEAD(&adapter->rwi_list);
4761         spin_lock_init(&adapter->rwi_lock);
4762         init_completion(&adapter->init_done);
4763         adapter->resetting = false;
4764
4765         adapter->mac_change_pending = false;
4766
4767         do {
4768                 rc = init_crq_queue(adapter);
4769                 if (rc) {
4770                         dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
4771                                 rc);
4772                         goto ibmvnic_init_fail;
4773                 }
4774
4775                 rc = ibmvnic_init(adapter);
4776                 if (rc && rc != EAGAIN)
4777                         goto ibmvnic_init_fail;
4778         } while (rc == EAGAIN);
4779
4780         rc = init_stats_buffers(adapter);
4781         if (rc)
4782                 goto ibmvnic_init_fail;
4783
4784         rc = init_stats_token(adapter);
4785         if (rc)
4786                 goto ibmvnic_stats_fail;
4787
4788         netdev->mtu = adapter->req_mtu - ETH_HLEN;
4789         netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4790         netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4791
4792         rc = device_create_file(&dev->dev, &dev_attr_failover);
4793         if (rc)
4794                 goto ibmvnic_dev_file_err;
4795
4796         netif_carrier_off(netdev);
4797         rc = register_netdev(netdev);
4798         if (rc) {
4799                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4800                 goto ibmvnic_register_fail;
4801         }
4802         dev_info(&dev->dev, "ibmvnic registered\n");
4803
4804         adapter->state = VNIC_PROBED;
4805
4806         adapter->wait_for_reset = false;
4807
4808         return 0;
4809
4810 ibmvnic_register_fail:
4811         device_remove_file(&dev->dev, &dev_attr_failover);
4812
4813 ibmvnic_dev_file_err:
4814         release_stats_token(adapter);
4815
4816 ibmvnic_stats_fail:
4817         release_stats_buffers(adapter);
4818
4819 ibmvnic_init_fail:
4820         release_sub_crqs(adapter, 1);
4821         release_crq_queue(adapter);
4822         free_netdev(netdev);
4823
4824         return rc;
4825 }
4826
4827 static int ibmvnic_remove(struct vio_dev *dev)
4828 {
4829         struct net_device *netdev = dev_get_drvdata(&dev->dev);
4830         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4831
4832         adapter->state = VNIC_REMOVING;
4833         rtnl_lock();
4834         unregister_netdevice(netdev);
4835
4836         release_resources(adapter);
4837         release_sub_crqs(adapter, 1);
4838         release_crq_queue(adapter);
4839
4840         release_stats_token(adapter);
4841         release_stats_buffers(adapter);
4842
4843         adapter->state = VNIC_REMOVED;
4844
4845         rtnl_unlock();
4846         device_remove_file(&dev->dev, &dev_attr_failover);
4847         free_netdev(netdev);
4848         dev_set_drvdata(&dev->dev, NULL);
4849
4850         return 0;
4851 }
4852
4853 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4854                               const char *buf, size_t count)
4855 {
4856         struct net_device *netdev = dev_get_drvdata(dev);
4857         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4858         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4859         __be64 session_token;
4860         long rc;
4861
4862         if (!sysfs_streq(buf, "1"))
4863                 return -EINVAL;
4864
4865         rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4866                          H_GET_SESSION_TOKEN, 0, 0, 0);
4867         if (rc) {
4868                 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4869                            rc);
4870                 return -EINVAL;
4871         }
4872
4873         session_token = (__be64)retbuf[0];
4874         netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4875                    be64_to_cpu(session_token));
4876         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4877                                 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4878         if (rc) {
4879                 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4880                            rc);
4881                 return -EINVAL;
4882         }
4883
4884         return count;
4885 }
4886
4887 static DEVICE_ATTR_WO(failover);
4888
4889 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4890 {
4891         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4892         struct ibmvnic_adapter *adapter;
4893         struct iommu_table *tbl;
4894         unsigned long ret = 0;
4895         int i;
4896
4897         tbl = get_iommu_table_base(&vdev->dev);
4898
4899         /* netdev inits at probe time along with the structures we need below*/
4900         if (!netdev)
4901                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4902
4903         adapter = netdev_priv(netdev);
4904
4905         ret += PAGE_SIZE; /* the crq message queue */
4906         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4907
4908         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4909                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4910
4911         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4912              i++)
4913                 ret += adapter->rx_pool[i].size *
4914                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4915
4916         return ret;
4917 }
4918
4919 static int ibmvnic_resume(struct device *dev)
4920 {
4921         struct net_device *netdev = dev_get_drvdata(dev);
4922         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4923
4924         if (adapter->state != VNIC_OPEN)
4925                 return 0;
4926
4927         tasklet_schedule(&adapter->tasklet);
4928
4929         return 0;
4930 }
4931
4932 static const struct vio_device_id ibmvnic_device_table[] = {
4933         {"network", "IBM,vnic"},
4934         {"", "" }
4935 };
4936 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4937
4938 static const struct dev_pm_ops ibmvnic_pm_ops = {
4939         .resume = ibmvnic_resume
4940 };
4941
4942 static struct vio_driver ibmvnic_driver = {
4943         .id_table       = ibmvnic_device_table,
4944         .probe          = ibmvnic_probe,
4945         .remove         = ibmvnic_remove,
4946         .get_desired_dma = ibmvnic_get_desired_dma,
4947         .name           = ibmvnic_driver_name,
4948         .pm             = &ibmvnic_pm_ops,
4949 };
4950
4951 /* module functions */
4952 static int __init ibmvnic_module_init(void)
4953 {
4954         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4955                 IBMVNIC_DRIVER_VERSION);
4956
4957         return vio_register_driver(&ibmvnic_driver);
4958 }
4959
4960 static void __exit ibmvnic_module_exit(void)
4961 {
4962         vio_unregister_driver(&ibmvnic_driver);
4963 }
4964
4965 module_init(ibmvnic_module_init);
4966 module_exit(ibmvnic_module_exit);