drivers/net/ethernet/ibm/ibmvnic.c

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