drivers/net/ethernet/ibm/ibmvnic.c

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