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[queue_num],
 804                                                (u64)tx_buff->indir_dma,
 805                                                (u64)num_entries);
 806         } else {
 807                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
 808                                       &tx_crq);
 809         }
 810         if (lpar_rc != H_SUCCESS) {
 811                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
 812
 813                 if (tx_pool->consumer_index == 0)
 814                         tx_pool->consumer_index =
 815                                 adapter->max_tx_entries_per_subcrq - 1;
 816                 else
 817                         tx_pool->consumer_index--;
 818
 819                 tx_send_failed++;
 820                 tx_dropped++;
 821                 ret = NETDEV_TX_BUSY;
 822                 goto out;
 823         }
 824         tx_packets++;
 825         tx_bytes += skb->len;
 826         txq->trans_start = jiffies;
 827         ret = NETDEV_TX_OK;
 828
 829 out:
 830         netdev->stats.tx_dropped += tx_dropped;
 831         netdev->stats.tx_bytes += tx_bytes;
 832         netdev->stats.tx_packets += tx_packets;
 833         adapter->tx_send_failed += tx_send_failed;
 834         adapter->tx_map_failed += tx_map_failed;
 835
 836         return ret;
 837 }
 838
 839 static void ibmvnic_set_multi(struct net_device *netdev)
 840 {
 841         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 842         struct netdev_hw_addr *ha;
 843         union ibmvnic_crq crq;
 844
 845         memset(&crq, 0, sizeof(crq));
 846         crq.request_capability.first = IBMVNIC_CRQ_CMD;
 847         crq.request_capability.cmd = REQUEST_CAPABILITY;
 848
 849         if (netdev->flags & IFF_PROMISC) {
 850                 if (!adapter->promisc_supported)
 851                         return;
 852         } else {
 853                 if (netdev->flags & IFF_ALLMULTI) {
 854                         /* Accept all multicast */
 855                         memset(&crq, 0, sizeof(crq));
 856                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 857                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 858                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
 859                         ibmvnic_send_crq(adapter, &crq);
 860                 } else if (netdev_mc_empty(netdev)) {
 861                         /* Reject all multicast */
 862                         memset(&crq, 0, sizeof(crq));
 863                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 864                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 865                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
 866                         ibmvnic_send_crq(adapter, &crq);
 867                 } else {
 868                         /* Accept one or more multicast(s) */
 869                         netdev_for_each_mc_addr(ha, netdev) {
 870                                 memset(&crq, 0, sizeof(crq));
 871                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 872                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 873                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
 874                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
 875                                                 ha->addr);
 876                                 ibmvnic_send_crq(adapter, &crq);
 877                         }
 878                 }
 879         }
 880 }
 881
 882 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
 883 {
 884         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 885         struct sockaddr *addr = p;
 886         union ibmvnic_crq crq;
 887
 888         if (!is_valid_ether_addr(addr->sa_data))
 889                 return -EADDRNOTAVAIL;
 890
 891         memset(&crq, 0, sizeof(crq));
 892         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
 893         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
 894         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
 895         ibmvnic_send_crq(adapter, &crq);
 896         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
 897         return 0;
 898 }
 899
 900 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
 901 {
 902         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 903
 904         if (new_mtu > adapter->req_mtu || new_mtu < adapter->min_mtu)
 905                 return -EINVAL;
 906
 907         netdev->mtu = new_mtu;
 908         return 0;
 909 }
 910
 911 static void ibmvnic_tx_timeout(struct net_device *dev)
 912 {
 913         struct ibmvnic_adapter *adapter = netdev_priv(dev);
 914         int rc;
 915
 916         /* Adapter timed out, resetting it */
 917         release_sub_crqs(adapter);
 918         rc = ibmvnic_reset_crq(adapter);
 919         if (rc)
 920                 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
 921         else
 922                 ibmvnic_send_crq_init(adapter);
 923 }
 924
 925 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
 926                                   struct ibmvnic_rx_buff *rx_buff)
 927 {
 928         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
 929
 930         rx_buff->skb = NULL;
 931
 932         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
 933         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
 934
 935         atomic_dec(&pool->available);
 936 }
 937
 938 static int ibmvnic_poll(struct napi_struct *napi, int budget)
 939 {
 940         struct net_device *netdev = napi->dev;
 941         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 942         int scrq_num = (int)(napi - adapter->napi);
 943         int frames_processed = 0;
 944 restart_poll:
 945         while (frames_processed < budget) {
 946                 struct sk_buff *skb;
 947                 struct ibmvnic_rx_buff *rx_buff;
 948                 union sub_crq *next;
 949                 u32 length;
 950                 u16 offset;
 951                 u8 flags = 0;
 952
 953                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
 954                         break;
 955                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
 956                 rx_buff =
 957                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
 958                                                           rx_comp.correlator);
 959                 /* do error checking */
 960                 if (next->rx_comp.rc) {
 961                         netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
 962                         /* free the entry */
 963                         next->rx_comp.first = 0;
 964                         remove_buff_from_pool(adapter, rx_buff);
 965                         break;
 966                 }
 967
 968                 length = be32_to_cpu(next->rx_comp.len);
 969                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
 970                 flags = next->rx_comp.flags;
 971                 skb = rx_buff->skb;
 972                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
 973                                         length);
 974                 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
 975                 /* free the entry */
 976                 next->rx_comp.first = 0;
 977                 remove_buff_from_pool(adapter, rx_buff);
 978
 979                 skb_put(skb, length);
 980                 skb->protocol = eth_type_trans(skb, netdev);
 981
 982                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
 983                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
 984                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 985                 }
 986
 987                 length = skb->len;
 988                 napi_gro_receive(napi, skb); /* send it up */
 989                 netdev->stats.rx_packets++;
 990                 netdev->stats.rx_bytes += length;
 991                 frames_processed++;
 992         }
 993         replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
 994
 995         if (frames_processed < budget) {
 996                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
 997                 napi_complete(napi);
 998                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
 999                     napi_reschedule(napi)) {
1000                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1001                         goto restart_poll;
1002                 }
1003         }
1004         return frames_processed;
1005 }
1006
1007 #ifdef CONFIG_NET_POLL_CONTROLLER
1008 static void ibmvnic_netpoll_controller(struct net_device *dev)
1009 {
1010         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1011         int i;
1012
1013         replenish_pools(netdev_priv(dev));
1014         for (i = 0; i < adapter->req_rx_queues; i++)
1015                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1016                                      adapter->rx_scrq[i]);
1017 }
1018 #endif
1019
1020 static const struct net_device_ops ibmvnic_netdev_ops = {
1021         .ndo_open               = ibmvnic_open,
1022         .ndo_stop               = ibmvnic_close,
1023         .ndo_start_xmit         = ibmvnic_xmit,
1024         .ndo_set_rx_mode        = ibmvnic_set_multi,
1025         .ndo_set_mac_address    = ibmvnic_set_mac,
1026         .ndo_validate_addr      = eth_validate_addr,
1027         .ndo_change_mtu         = ibmvnic_change_mtu,
1028         .ndo_tx_timeout         = ibmvnic_tx_timeout,
1029 #ifdef CONFIG_NET_POLL_CONTROLLER
1030         .ndo_poll_controller    = ibmvnic_netpoll_controller,
1031 #endif
1032 };
1033
1034 /* ethtool functions */
1035
1036 static int ibmvnic_get_settings(struct net_device *netdev,
1037                                 struct ethtool_cmd *cmd)
1038 {
1039         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1040                           SUPPORTED_FIBRE);
1041         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1042                             ADVERTISED_FIBRE);
1043         ethtool_cmd_speed_set(cmd, SPEED_1000);
1044         cmd->duplex = DUPLEX_FULL;
1045         cmd->port = PORT_FIBRE;
1046         cmd->phy_address = 0;
1047         cmd->transceiver = XCVR_INTERNAL;
1048         cmd->autoneg = AUTONEG_ENABLE;
1049         cmd->maxtxpkt = 0;
1050         cmd->maxrxpkt = 1;
1051         return 0;
1052 }
1053
1054 static void ibmvnic_get_drvinfo(struct net_device *dev,
1055                                 struct ethtool_drvinfo *info)
1056 {
1057         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1058         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1059 }
1060
1061 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1062 {
1063         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1064
1065         return adapter->msg_enable;
1066 }
1067
1068 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1069 {
1070         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1071
1072         adapter->msg_enable = data;
1073 }
1074
1075 static u32 ibmvnic_get_link(struct net_device *netdev)
1076 {
1077         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1078
1079         /* Don't need to send a query because we request a logical link up at
1080          * init and then we wait for link state indications
1081          */
1082         return adapter->logical_link_state;
1083 }
1084
1085 static void ibmvnic_get_ringparam(struct net_device *netdev,
1086                                   struct ethtool_ringparam *ring)
1087 {
1088         ring->rx_max_pending = 0;
1089         ring->tx_max_pending = 0;
1090         ring->rx_mini_max_pending = 0;
1091         ring->rx_jumbo_max_pending = 0;
1092         ring->rx_pending = 0;
1093         ring->tx_pending = 0;
1094         ring->rx_mini_pending = 0;
1095         ring->rx_jumbo_pending = 0;
1096 }
1097
1098 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1099 {
1100         int i;
1101
1102         if (stringset != ETH_SS_STATS)
1103                 return;
1104
1105         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1106                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1107 }
1108
1109 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1110 {
1111         switch (sset) {
1112         case ETH_SS_STATS:
1113                 return ARRAY_SIZE(ibmvnic_stats);
1114         default:
1115                 return -EOPNOTSUPP;
1116         }
1117 }
1118
1119 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1120                                       struct ethtool_stats *stats, u64 *data)
1121 {
1122         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1123         union ibmvnic_crq crq;
1124         int i;
1125
1126         memset(&crq, 0, sizeof(crq));
1127         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1128         crq.request_statistics.cmd = REQUEST_STATISTICS;
1129         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1130         crq.request_statistics.len =
1131             cpu_to_be32(sizeof(struct ibmvnic_statistics));
1132         ibmvnic_send_crq(adapter, &crq);
1133
1134         /* Wait for data to be written */
1135         init_completion(&adapter->stats_done);
1136         wait_for_completion(&adapter->stats_done);
1137
1138         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1139                 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1140 }
1141
1142 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1143         .get_settings           = ibmvnic_get_settings,
1144         .get_drvinfo            = ibmvnic_get_drvinfo,
1145         .get_msglevel           = ibmvnic_get_msglevel,
1146         .set_msglevel           = ibmvnic_set_msglevel,
1147         .get_link               = ibmvnic_get_link,
1148         .get_ringparam          = ibmvnic_get_ringparam,
1149         .get_strings            = ibmvnic_get_strings,
1150         .get_sset_count         = ibmvnic_get_sset_count,
1151         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
1152 };
1153
1154 /* Routines for managing CRQs/sCRQs  */
1155
1156 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1157                                   struct ibmvnic_sub_crq_queue *scrq)
1158 {
1159         struct device *dev = &adapter->vdev->dev;
1160         long rc;
1161
1162         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1163
1164         /* Close the sub-crqs */
1165         do {
1166                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1167                                         adapter->vdev->unit_address,
1168                                         scrq->crq_num);
1169         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1170
1171         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1172                          DMA_BIDIRECTIONAL);
1173         free_pages((unsigned long)scrq->msgs, 2);
1174         kfree(scrq);
1175 }
1176
1177 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1178                                                         *adapter)
1179 {
1180         struct device *dev = &adapter->vdev->dev;
1181         struct ibmvnic_sub_crq_queue *scrq;
1182         int rc;
1183
1184         scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1185         if (!scrq)
1186                 return NULL;
1187
1188         scrq->msgs = (union sub_crq *)__get_free_pages(GFP_KERNEL, 2);
1189         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1190         if (!scrq->msgs) {
1191                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1192                 goto zero_page_failed;
1193         }
1194
1195         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1196                                          DMA_BIDIRECTIONAL);
1197         if (dma_mapping_error(dev, scrq->msg_token)) {
1198                 dev_warn(dev, "Couldn't map crq queue messages page\n");
1199                 goto map_failed;
1200         }
1201
1202         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1203                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1204
1205         if (rc == H_RESOURCE)
1206                 rc = ibmvnic_reset_crq(adapter);
1207
1208         if (rc == H_CLOSED) {
1209                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1210         } else if (rc) {
1211                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1212                 goto reg_failed;
1213         }
1214
1215         scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1216         if (scrq->irq == NO_IRQ) {
1217                 dev_err(dev, "Error mapping irq\n");
1218                 goto map_irq_failed;
1219         }
1220
1221         scrq->adapter = adapter;
1222         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1223         scrq->cur = 0;
1224         scrq->rx_skb_top = NULL;
1225         spin_lock_init(&scrq->lock);
1226
1227         netdev_dbg(adapter->netdev,
1228                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1229                    scrq->crq_num, scrq->hw_irq, scrq->irq);
1230
1231         return scrq;
1232
1233 map_irq_failed:
1234         do {
1235                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1236                                         adapter->vdev->unit_address,
1237                                         scrq->crq_num);
1238         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1239 reg_failed:
1240         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1241                          DMA_BIDIRECTIONAL);
1242 map_failed:
1243         free_pages((unsigned long)scrq->msgs, 2);
1244 zero_page_failed:
1245         kfree(scrq);
1246
1247         return NULL;
1248 }
1249
1250 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1251 {
1252         int i;
1253
1254         if (adapter->tx_scrq) {
1255                 for (i = 0; i < adapter->req_tx_queues; i++)
1256                         if (adapter->tx_scrq[i]) {
1257                                 free_irq(adapter->tx_scrq[i]->irq,
1258                                          adapter->tx_scrq[i]);
1259                                 release_sub_crq_queue(adapter,
1260                                                       adapter->tx_scrq[i]);
1261                         }
1262                 adapter->tx_scrq = NULL;
1263         }
1264
1265         if (adapter->rx_scrq) {
1266                 for (i = 0; i < adapter->req_rx_queues; i++)
1267                         if (adapter->rx_scrq[i]) {
1268                                 free_irq(adapter->rx_scrq[i]->irq,
1269                                          adapter->rx_scrq[i]);
1270                                 release_sub_crq_queue(adapter,
1271                                                       adapter->rx_scrq[i]);
1272                         }
1273                 adapter->rx_scrq = NULL;
1274         }
1275
1276         adapter->requested_caps = 0;
1277 }
1278
1279 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1280                             struct ibmvnic_sub_crq_queue *scrq)
1281 {
1282         struct device *dev = &adapter->vdev->dev;
1283         unsigned long rc;
1284
1285         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1286                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1287         if (rc)
1288                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1289                         scrq->hw_irq, rc);
1290         return rc;
1291 }
1292
1293 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1294                            struct ibmvnic_sub_crq_queue *scrq)
1295 {
1296         struct device *dev = &adapter->vdev->dev;
1297         unsigned long rc;
1298
1299         if (scrq->hw_irq > 0x100000000ULL) {
1300                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1301                 return 1;
1302         }
1303
1304         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1305                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1306         if (rc)
1307                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1308                         scrq->hw_irq, rc);
1309         return rc;
1310 }
1311
1312 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1313                                struct ibmvnic_sub_crq_queue *scrq)
1314 {
1315         struct device *dev = &adapter->vdev->dev;
1316         struct ibmvnic_tx_buff *txbuff;
1317         union sub_crq *next;
1318         int index;
1319         int i, j;
1320         u8 first;
1321
1322 restart_loop:
1323         while (pending_scrq(adapter, scrq)) {
1324                 unsigned int pool = scrq->pool_index;
1325
1326                 next = ibmvnic_next_scrq(adapter, scrq);
1327                 for (i = 0; i < next->tx_comp.num_comps; i++) {
1328                         if (next->tx_comp.rcs[i]) {
1329                                 dev_err(dev, "tx error %x\n",
1330                                         next->tx_comp.rcs[i]);
1331                                 continue;
1332                         }
1333                         index = be32_to_cpu(next->tx_comp.correlators[i]);
1334                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
1335
1336                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1337                                 if (!txbuff->data_dma[j])
1338                                         continue;
1339
1340                                 txbuff->data_dma[j] = 0;
1341                                 txbuff->used_bounce = false;
1342                         }
1343                         /* if sub_crq was sent indirectly */
1344                         first = txbuff->indir_arr[0].generic.first;
1345                         if (first == IBMVNIC_CRQ_CMD) {
1346                                 dma_unmap_single(dev, txbuff->indir_dma,
1347                                                  sizeof(txbuff->indir_arr),
1348                                                  DMA_TO_DEVICE);
1349                         }
1350
1351                         if (txbuff->last_frag)
1352                                 dev_kfree_skb_any(txbuff->skb);
1353
1354                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1355                                                      producer_index] = index;
1356                         adapter->tx_pool[pool].producer_index =
1357                             (adapter->tx_pool[pool].producer_index + 1) %
1358                             adapter->max_tx_entries_per_subcrq;
1359                 }
1360                 /* remove tx_comp scrq*/
1361                 next->tx_comp.first = 0;
1362         }
1363
1364         enable_scrq_irq(adapter, scrq);
1365
1366         if (pending_scrq(adapter, scrq)) {
1367                 disable_scrq_irq(adapter, scrq);
1368                 goto restart_loop;
1369         }
1370
1371         return 0;
1372 }
1373
1374 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1375 {
1376         struct ibmvnic_sub_crq_queue *scrq = instance;
1377         struct ibmvnic_adapter *adapter = scrq->adapter;
1378
1379         disable_scrq_irq(adapter, scrq);
1380         ibmvnic_complete_tx(adapter, scrq);
1381
1382         return IRQ_HANDLED;
1383 }
1384
1385 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1386 {
1387         struct ibmvnic_sub_crq_queue *scrq = instance;
1388         struct ibmvnic_adapter *adapter = scrq->adapter;
1389
1390         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1391                 disable_scrq_irq(adapter, scrq);
1392                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1393         }
1394
1395         return IRQ_HANDLED;
1396 }
1397
1398 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1399 {
1400         struct device *dev = &adapter->vdev->dev;
1401         struct ibmvnic_sub_crq_queue **allqueues;
1402         int registered_queues = 0;
1403         union ibmvnic_crq crq;
1404         int total_queues;
1405         int more = 0;
1406         int i, j;
1407         int rc;
1408
1409         if (!retry) {
1410                 /* Sub-CRQ entries are 32 byte long */
1411                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1412
1413                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1414                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
1415                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1416                         goto allqueues_failed;
1417                 }
1418
1419                 /* Get the minimum between the queried max and the entries
1420                  * that fit in our PAGE_SIZE
1421                  */
1422                 adapter->req_tx_entries_per_subcrq =
1423                     adapter->max_tx_entries_per_subcrq > entries_page ?
1424                     entries_page : adapter->max_tx_entries_per_subcrq;
1425                 adapter->req_rx_add_entries_per_subcrq =
1426                     adapter->max_rx_add_entries_per_subcrq > entries_page ?
1427                     entries_page : adapter->max_rx_add_entries_per_subcrq;
1428
1429                 /* Choosing the maximum number of queues supported by firmware*/
1430                 adapter->req_tx_queues = adapter->max_tx_queues;
1431                 adapter->req_rx_queues = adapter->max_rx_queues;
1432                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
1433
1434                 adapter->req_mtu = adapter->max_mtu;
1435         }
1436
1437         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1438
1439         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1440         if (!allqueues)
1441                 goto allqueues_failed;
1442
1443         for (i = 0; i < total_queues; i++) {
1444                 allqueues[i] = init_sub_crq_queue(adapter);
1445                 if (!allqueues[i]) {
1446                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1447                         break;
1448                 }
1449                 registered_queues++;
1450         }
1451
1452         /* Make sure we were able to register the minimum number of queues */
1453         if (registered_queues <
1454             adapter->min_tx_queues + adapter->min_rx_queues) {
1455                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
1456                 goto tx_failed;
1457         }
1458
1459         /* Distribute the failed allocated queues*/
1460         for (i = 0; i < total_queues - registered_queues + more ; i++) {
1461                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1462                 switch (i % 3) {
1463                 case 0:
1464                         if (adapter->req_rx_queues > adapter->min_rx_queues)
1465                                 adapter->req_rx_queues--;
1466                         else
1467                                 more++;
1468                         break;
1469                 case 1:
1470                         if (adapter->req_tx_queues > adapter->min_tx_queues)
1471                                 adapter->req_tx_queues--;
1472                         else
1473                                 more++;
1474                         break;
1475                 }
1476         }
1477
1478         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1479                                    sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1480         if (!adapter->tx_scrq)
1481                 goto tx_failed;
1482
1483         for (i = 0; i < adapter->req_tx_queues; i++) {
1484                 adapter->tx_scrq[i] = allqueues[i];
1485                 adapter->tx_scrq[i]->pool_index = i;
1486                 rc = request_irq(adapter->tx_scrq[i]->irq, ibmvnic_interrupt_tx,
1487                                  0, "ibmvnic_tx", adapter->tx_scrq[i]);
1488                 if (rc) {
1489                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1490                                 adapter->tx_scrq[i]->irq, rc);
1491                         goto req_tx_irq_failed;
1492                 }
1493         }
1494
1495         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1496                                    sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1497         if (!adapter->rx_scrq)
1498                 goto rx_failed;
1499
1500         for (i = 0; i < adapter->req_rx_queues; i++) {
1501                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1502                 adapter->rx_scrq[i]->scrq_num = i;
1503                 rc = request_irq(adapter->rx_scrq[i]->irq, ibmvnic_interrupt_rx,
1504                                  0, "ibmvnic_rx", adapter->rx_scrq[i]);
1505                 if (rc) {
1506                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1507                                 adapter->rx_scrq[i]->irq, rc);
1508                         goto req_rx_irq_failed;
1509                 }
1510         }
1511
1512         memset(&crq, 0, sizeof(crq));
1513         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1514         crq.request_capability.cmd = REQUEST_CAPABILITY;
1515
1516         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
1517         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
1518         ibmvnic_send_crq(adapter, &crq);
1519
1520         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
1521         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
1522         ibmvnic_send_crq(adapter, &crq);
1523
1524         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
1525         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
1526         ibmvnic_send_crq(adapter, &crq);
1527
1528         crq.request_capability.capability =
1529             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1530         crq.request_capability.number =
1531             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
1532         ibmvnic_send_crq(adapter, &crq);
1533
1534         crq.request_capability.capability =
1535             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1536         crq.request_capability.number =
1537             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
1538         ibmvnic_send_crq(adapter, &crq);
1539
1540         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
1541         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
1542         ibmvnic_send_crq(adapter, &crq);
1543
1544         if (adapter->netdev->flags & IFF_PROMISC) {
1545                 if (adapter->promisc_supported) {
1546                         crq.request_capability.capability =
1547                             cpu_to_be16(PROMISC_REQUESTED);
1548                         crq.request_capability.number = cpu_to_be64(1);
1549                         ibmvnic_send_crq(adapter, &crq);
1550                 }
1551         } else {
1552                 crq.request_capability.capability =
1553                     cpu_to_be16(PROMISC_REQUESTED);
1554                 crq.request_capability.number = cpu_to_be64(0);
1555                 ibmvnic_send_crq(adapter, &crq);
1556         }
1557
1558         kfree(allqueues);
1559
1560         return;
1561
1562 req_rx_irq_failed:
1563         for (j = 0; j < i; j++)
1564                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1565         i = adapter->req_tx_queues;
1566 req_tx_irq_failed:
1567         for (j = 0; j < i; j++)
1568                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1569         kfree(adapter->rx_scrq);
1570         adapter->rx_scrq = NULL;
1571 rx_failed:
1572         kfree(adapter->tx_scrq);
1573         adapter->tx_scrq = NULL;
1574 tx_failed:
1575         for (i = 0; i < registered_queues; i++)
1576                 release_sub_crq_queue(adapter, allqueues[i]);
1577         kfree(allqueues);
1578 allqueues_failed:
1579         ibmvnic_remove(adapter->vdev);
1580 }
1581
1582 static int pending_scrq(struct ibmvnic_adapter *adapter,
1583                         struct ibmvnic_sub_crq_queue *scrq)
1584 {
1585         union sub_crq *entry = &scrq->msgs[scrq->cur];
1586
1587         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1588                 return 1;
1589         else
1590                 return 0;
1591 }
1592
1593 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1594                                         struct ibmvnic_sub_crq_queue *scrq)
1595 {
1596         union sub_crq *entry;
1597         unsigned long flags;
1598
1599         spin_lock_irqsave(&scrq->lock, flags);
1600         entry = &scrq->msgs[scrq->cur];
1601         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1602                 if (++scrq->cur == scrq->size)
1603                         scrq->cur = 0;
1604         } else {
1605                 entry = NULL;
1606         }
1607         spin_unlock_irqrestore(&scrq->lock, flags);
1608
1609         return entry;
1610 }
1611
1612 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1613 {
1614         struct ibmvnic_crq_queue *queue = &adapter->crq;
1615         union ibmvnic_crq *crq;
1616
1617         crq = &queue->msgs[queue->cur];
1618         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1619                 if (++queue->cur == queue->size)
1620                         queue->cur = 0;
1621         } else {
1622                 crq = NULL;
1623         }
1624
1625         return crq;
1626 }
1627
1628 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1629                        union sub_crq *sub_crq)
1630 {
1631         unsigned int ua = adapter->vdev->unit_address;
1632         struct device *dev = &adapter->vdev->dev;
1633         u64 *u64_crq = (u64 *)sub_crq;
1634         int rc;
1635
1636         netdev_dbg(adapter->netdev,
1637                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1638                    (unsigned long int)cpu_to_be64(remote_handle),
1639                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1640                    (unsigned long int)cpu_to_be64(u64_crq[1]),
1641                    (unsigned long int)cpu_to_be64(u64_crq[2]),
1642                    (unsigned long int)cpu_to_be64(u64_crq[3]));
1643
1644         /* Make sure the hypervisor sees the complete request */
1645         mb();
1646
1647         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1648                                 cpu_to_be64(remote_handle),
1649                                 cpu_to_be64(u64_crq[0]),
1650                                 cpu_to_be64(u64_crq[1]),
1651                                 cpu_to_be64(u64_crq[2]),
1652                                 cpu_to_be64(u64_crq[3]));
1653
1654         if (rc) {
1655                 if (rc == H_CLOSED)
1656                         dev_warn(dev, "CRQ Queue closed\n");
1657                 dev_err(dev, "Send error (rc=%d)\n", rc);
1658         }
1659
1660         return rc;
1661 }
1662
1663 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
1664                                 u64 remote_handle, u64 ioba, u64 num_entries)
1665 {
1666         unsigned int ua = adapter->vdev->unit_address;
1667         struct device *dev = &adapter->vdev->dev;
1668         int rc;
1669
1670         /* Make sure the hypervisor sees the complete request */
1671         mb();
1672         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
1673                                 cpu_to_be64(remote_handle),
1674                                 ioba, num_entries);
1675
1676         if (rc) {
1677                 if (rc == H_CLOSED)
1678                         dev_warn(dev, "CRQ Queue closed\n");
1679                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
1680         }
1681
1682         return rc;
1683 }
1684
1685 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1686                             union ibmvnic_crq *crq)
1687 {
1688         unsigned int ua = adapter->vdev->unit_address;
1689         struct device *dev = &adapter->vdev->dev;
1690         u64 *u64_crq = (u64 *)crq;
1691         int rc;
1692
1693         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1694                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1695                    (unsigned long int)cpu_to_be64(u64_crq[1]));
1696
1697         /* Make sure the hypervisor sees the complete request */
1698         mb();
1699
1700         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1701                                 cpu_to_be64(u64_crq[0]),
1702                                 cpu_to_be64(u64_crq[1]));
1703
1704         if (rc) {
1705                 if (rc == H_CLOSED)
1706                         dev_warn(dev, "CRQ Queue closed\n");
1707                 dev_warn(dev, "Send error (rc=%d)\n", rc);
1708         }
1709
1710         return rc;
1711 }
1712
1713 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1714 {
1715         union ibmvnic_crq crq;
1716
1717         memset(&crq, 0, sizeof(crq));
1718         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1719         crq.generic.cmd = IBMVNIC_CRQ_INIT;
1720         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1721
1722         return ibmvnic_send_crq(adapter, &crq);
1723 }
1724
1725 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1726 {
1727         union ibmvnic_crq crq;
1728
1729         memset(&crq, 0, sizeof(crq));
1730         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1731         crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1732         netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1733
1734         return ibmvnic_send_crq(adapter, &crq);
1735 }
1736
1737 static int send_version_xchg(struct ibmvnic_adapter *adapter)
1738 {
1739         union ibmvnic_crq crq;
1740
1741         memset(&crq, 0, sizeof(crq));
1742         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1743         crq.version_exchange.cmd = VERSION_EXCHANGE;
1744         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1745
1746         return ibmvnic_send_crq(adapter, &crq);
1747 }
1748
1749 static void send_login(struct ibmvnic_adapter *adapter)
1750 {
1751         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1752         struct ibmvnic_login_buffer *login_buffer;
1753         struct ibmvnic_inflight_cmd *inflight_cmd;
1754         struct device *dev = &adapter->vdev->dev;
1755         dma_addr_t rsp_buffer_token;
1756         dma_addr_t buffer_token;
1757         size_t rsp_buffer_size;
1758         union ibmvnic_crq crq;
1759         unsigned long flags;
1760         size_t buffer_size;
1761         __be64 *tx_list_p;
1762         __be64 *rx_list_p;
1763         int i;
1764
1765         buffer_size =
1766             sizeof(struct ibmvnic_login_buffer) +
1767             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1768
1769         login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1770         if (!login_buffer)
1771                 goto buf_alloc_failed;
1772
1773         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1774                                       DMA_TO_DEVICE);
1775         if (dma_mapping_error(dev, buffer_token)) {
1776                 dev_err(dev, "Couldn't map login buffer\n");
1777                 goto buf_map_failed;
1778         }
1779
1780         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
1781                           sizeof(u64) * adapter->req_tx_queues +
1782                           sizeof(u64) * adapter->req_rx_queues +
1783                           sizeof(u64) * adapter->req_rx_queues +
1784                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
1785
1786         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1787         if (!login_rsp_buffer)
1788                 goto buf_rsp_alloc_failed;
1789
1790         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1791                                           rsp_buffer_size, DMA_FROM_DEVICE);
1792         if (dma_mapping_error(dev, rsp_buffer_token)) {
1793                 dev_err(dev, "Couldn't map login rsp buffer\n");
1794                 goto buf_rsp_map_failed;
1795         }
1796         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
1797         if (!inflight_cmd) {
1798                 dev_err(dev, "Couldn't allocate inflight_cmd\n");
1799                 goto inflight_alloc_failed;
1800         }
1801         adapter->login_buf = login_buffer;
1802         adapter->login_buf_token = buffer_token;
1803         adapter->login_buf_sz = buffer_size;
1804         adapter->login_rsp_buf = login_rsp_buffer;
1805         adapter->login_rsp_buf_token = rsp_buffer_token;
1806         adapter->login_rsp_buf_sz = rsp_buffer_size;
1807
1808         login_buffer->len = cpu_to_be32(buffer_size);
1809         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
1810         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
1811         login_buffer->off_txcomp_subcrqs =
1812             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
1813         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
1814         login_buffer->off_rxcomp_subcrqs =
1815             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
1816                         sizeof(u64) * adapter->req_tx_queues);
1817         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
1818         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
1819
1820         tx_list_p = (__be64 *)((char *)login_buffer +
1821                                       sizeof(struct ibmvnic_login_buffer));
1822         rx_list_p = (__be64 *)((char *)login_buffer +
1823                                       sizeof(struct ibmvnic_login_buffer) +
1824                                       sizeof(u64) * adapter->req_tx_queues);
1825
1826         for (i = 0; i < adapter->req_tx_queues; i++) {
1827                 if (adapter->tx_scrq[i]) {
1828                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
1829                                                    crq_num);
1830                 }
1831         }
1832
1833         for (i = 0; i < adapter->req_rx_queues; i++) {
1834                 if (adapter->rx_scrq[i]) {
1835                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
1836                                                    crq_num);
1837                 }
1838         }
1839
1840         netdev_dbg(adapter->netdev, "Login Buffer:\n");
1841         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
1842                 netdev_dbg(adapter->netdev, "%016lx\n",
1843                            ((unsigned long int *)(adapter->login_buf))[i]);
1844         }
1845
1846         memset(&crq, 0, sizeof(crq));
1847         crq.login.first = IBMVNIC_CRQ_CMD;
1848         crq.login.cmd = LOGIN;
1849         crq.login.ioba = cpu_to_be32(buffer_token);
1850         crq.login.len = cpu_to_be32(buffer_size);
1851
1852         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
1853
1854         spin_lock_irqsave(&adapter->inflight_lock, flags);
1855         list_add_tail(&inflight_cmd->list, &adapter->inflight);
1856         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
1857
1858         ibmvnic_send_crq(adapter, &crq);
1859
1860         return;
1861
1862 inflight_alloc_failed:
1863         dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
1864                          DMA_FROM_DEVICE);
1865 buf_rsp_map_failed:
1866         kfree(login_rsp_buffer);
1867 buf_rsp_alloc_failed:
1868         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
1869 buf_map_failed:
1870         kfree(login_buffer);
1871 buf_alloc_failed:
1872         return;
1873 }
1874
1875 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
1876                              u32 len, u8 map_id)
1877 {
1878         union ibmvnic_crq crq;
1879
1880         memset(&crq, 0, sizeof(crq));
1881         crq.request_map.first = IBMVNIC_CRQ_CMD;
1882         crq.request_map.cmd = REQUEST_MAP;
1883         crq.request_map.map_id = map_id;
1884         crq.request_map.ioba = cpu_to_be32(addr);
1885         crq.request_map.len = cpu_to_be32(len);
1886         ibmvnic_send_crq(adapter, &crq);
1887 }
1888
1889 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
1890 {
1891         union ibmvnic_crq crq;
1892
1893         memset(&crq, 0, sizeof(crq));
1894         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
1895         crq.request_unmap.cmd = REQUEST_UNMAP;
1896         crq.request_unmap.map_id = map_id;
1897         ibmvnic_send_crq(adapter, &crq);
1898 }
1899
1900 static void send_map_query(struct ibmvnic_adapter *adapter)
1901 {
1902         union ibmvnic_crq crq;
1903
1904         memset(&crq, 0, sizeof(crq));
1905         crq.query_map.first = IBMVNIC_CRQ_CMD;
1906         crq.query_map.cmd = QUERY_MAP;
1907         ibmvnic_send_crq(adapter, &crq);
1908 }
1909
1910 /* Send a series of CRQs requesting various capabilities of the VNIC server */
1911 static void send_cap_queries(struct ibmvnic_adapter *adapter)
1912 {
1913         union ibmvnic_crq crq;
1914
1915         atomic_set(&adapter->running_cap_queries, 0);
1916         memset(&crq, 0, sizeof(crq));
1917         crq.query_capability.first = IBMVNIC_CRQ_CMD;
1918         crq.query_capability.cmd = QUERY_CAPABILITY;
1919
1920         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
1921         atomic_inc(&adapter->running_cap_queries);
1922         ibmvnic_send_crq(adapter, &crq);
1923
1924         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
1925         atomic_inc(&adapter->running_cap_queries);
1926         ibmvnic_send_crq(adapter, &crq);
1927
1928         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
1929         atomic_inc(&adapter->running_cap_queries);
1930         ibmvnic_send_crq(adapter, &crq);
1931
1932         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
1933         atomic_inc(&adapter->running_cap_queries);
1934         ibmvnic_send_crq(adapter, &crq);
1935
1936         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
1937         atomic_inc(&adapter->running_cap_queries);
1938         ibmvnic_send_crq(adapter, &crq);
1939
1940         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
1941         atomic_inc(&adapter->running_cap_queries);
1942         ibmvnic_send_crq(adapter, &crq);
1943
1944         crq.query_capability.capability =
1945             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
1946         atomic_inc(&adapter->running_cap_queries);
1947         ibmvnic_send_crq(adapter, &crq);
1948
1949         crq.query_capability.capability =
1950             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
1951         atomic_inc(&adapter->running_cap_queries);
1952         ibmvnic_send_crq(adapter, &crq);
1953
1954         crq.query_capability.capability =
1955             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
1956         atomic_inc(&adapter->running_cap_queries);
1957         ibmvnic_send_crq(adapter, &crq);
1958
1959         crq.query_capability.capability =
1960             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
1961         atomic_inc(&adapter->running_cap_queries);
1962         ibmvnic_send_crq(adapter, &crq);
1963
1964         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
1965         atomic_inc(&adapter->running_cap_queries);
1966         ibmvnic_send_crq(adapter, &crq);
1967
1968         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
1969         atomic_inc(&adapter->running_cap_queries);
1970         ibmvnic_send_crq(adapter, &crq);
1971
1972         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
1973         atomic_inc(&adapter->running_cap_queries);
1974         ibmvnic_send_crq(adapter, &crq);
1975
1976         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
1977         atomic_inc(&adapter->running_cap_queries);
1978         ibmvnic_send_crq(adapter, &crq);
1979
1980         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
1981         atomic_inc(&adapter->running_cap_queries);
1982         ibmvnic_send_crq(adapter, &crq);
1983
1984         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
1985         atomic_inc(&adapter->running_cap_queries);
1986         ibmvnic_send_crq(adapter, &crq);
1987
1988         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
1989         atomic_inc(&adapter->running_cap_queries);
1990         ibmvnic_send_crq(adapter, &crq);
1991
1992         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
1993         atomic_inc(&adapter->running_cap_queries);
1994         ibmvnic_send_crq(adapter, &crq);
1995
1996         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
1997         atomic_inc(&adapter->running_cap_queries);
1998         ibmvnic_send_crq(adapter, &crq);
1999
2000         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2001         atomic_inc(&adapter->running_cap_queries);
2002         ibmvnic_send_crq(adapter, &crq);
2003
2004         crq.query_capability.capability =
2005                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2006         atomic_inc(&adapter->running_cap_queries);
2007         ibmvnic_send_crq(adapter, &crq);
2008
2009         crq.query_capability.capability =
2010                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2011         atomic_inc(&adapter->running_cap_queries);
2012         ibmvnic_send_crq(adapter, &crq);
2013
2014         crq.query_capability.capability =
2015                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2016         atomic_inc(&adapter->running_cap_queries);
2017         ibmvnic_send_crq(adapter, &crq);
2018
2019         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2020         atomic_inc(&adapter->running_cap_queries);
2021         ibmvnic_send_crq(adapter, &crq);
2022 }
2023
2024 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2025 {
2026         struct device *dev = &adapter->vdev->dev;
2027         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2028         union ibmvnic_crq crq;
2029         int i;
2030
2031         dma_unmap_single(dev, adapter->ip_offload_tok,
2032                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2033
2034         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2035         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2036                 netdev_dbg(adapter->netdev, "%016lx\n",
2037                            ((unsigned long int *)(buf))[i]);
2038
2039         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2040         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2041         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2042                    buf->tcp_ipv4_chksum);
2043         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2044                    buf->tcp_ipv6_chksum);
2045         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2046                    buf->udp_ipv4_chksum);
2047         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2048                    buf->udp_ipv6_chksum);
2049         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2050                    buf->large_tx_ipv4);
2051         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2052                    buf->large_tx_ipv6);
2053         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2054                    buf->large_rx_ipv4);
2055         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2056                    buf->large_rx_ipv6);
2057         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2058                    buf->max_ipv4_header_size);
2059         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2060                    buf->max_ipv6_header_size);
2061         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2062                    buf->max_tcp_header_size);
2063         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2064                    buf->max_udp_header_size);
2065         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2066                    buf->max_large_tx_size);
2067         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2068                    buf->max_large_rx_size);
2069         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2070                    buf->ipv6_extension_header);
2071         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2072                    buf->tcp_pseudosum_req);
2073         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2074                    buf->num_ipv6_ext_headers);
2075         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2076                    buf->off_ipv6_ext_headers);
2077
2078         adapter->ip_offload_ctrl_tok =
2079             dma_map_single(dev, &adapter->ip_offload_ctrl,
2080                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2081
2082         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2083                 dev_err(dev, "Couldn't map ip offload control buffer\n");
2084                 return;
2085         }
2086
2087         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2088         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2089         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2090         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2091         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2092
2093         /* large_tx/rx disabled for now, additional features needed */
2094         adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2095         adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2096         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2097         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2098
2099         adapter->netdev->features = NETIF_F_GSO;
2100
2101         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2102                 adapter->netdev->features |= NETIF_F_IP_CSUM;
2103
2104         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2105                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2106
2107         if ((adapter->netdev->features &
2108             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2109                 adapter->netdev->features |= NETIF_F_RXCSUM;
2110
2111         memset(&crq, 0, sizeof(crq));
2112         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2113         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2114         crq.control_ip_offload.len =
2115             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2116         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2117         ibmvnic_send_crq(adapter, &crq);
2118 }
2119
2120 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2121                                   struct ibmvnic_adapter *adapter)
2122 {
2123         struct device *dev = &adapter->vdev->dev;
2124         struct ibmvnic_error_buff *error_buff, *tmp;
2125         unsigned long flags;
2126         bool found = false;
2127         int i;
2128
2129         if (!crq->request_error_rsp.rc.code) {
2130                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2131                          crq->request_error_rsp.rc.code);
2132                 return;
2133         }
2134
2135         spin_lock_irqsave(&adapter->error_list_lock, flags);
2136         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2137                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2138                         found = true;
2139                         list_del(&error_buff->list);
2140                         break;
2141                 }
2142         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2143
2144         if (!found) {
2145                 dev_err(dev, "Couldn't find error id %x\n",
2146                         crq->request_error_rsp.error_id);
2147                 return;
2148         }
2149
2150         dev_err(dev, "Detailed info for error id %x:",
2151                 crq->request_error_rsp.error_id);
2152
2153         for (i = 0; i < error_buff->len; i++) {
2154                 pr_cont("%02x", (int)error_buff->buff[i]);
2155                 if (i % 8 == 7)
2156                         pr_cont(" ");
2157         }
2158         pr_cont("\n");
2159
2160         dma_unmap_single(dev, error_buff->dma, error_buff->len,
2161                          DMA_FROM_DEVICE);
2162         kfree(error_buff->buff);
2163         kfree(error_buff);
2164 }
2165
2166 static void handle_dump_size_rsp(union ibmvnic_crq *crq,
2167                                  struct ibmvnic_adapter *adapter)
2168 {
2169         int len = be32_to_cpu(crq->request_dump_size_rsp.len);
2170         struct ibmvnic_inflight_cmd *inflight_cmd;
2171         struct device *dev = &adapter->vdev->dev;
2172         union ibmvnic_crq newcrq;
2173         unsigned long flags;
2174
2175         /* allocate and map buffer */
2176         adapter->dump_data = kmalloc(len, GFP_KERNEL);
2177         if (!adapter->dump_data) {
2178                 complete(&adapter->fw_done);
2179                 return;
2180         }
2181
2182         adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len,
2183                                                   DMA_FROM_DEVICE);
2184
2185         if (dma_mapping_error(dev, adapter->dump_data_token)) {
2186                 if (!firmware_has_feature(FW_FEATURE_CMO))
2187                         dev_err(dev, "Couldn't map dump data\n");
2188                 kfree(adapter->dump_data);
2189                 complete(&adapter->fw_done);
2190                 return;
2191         }
2192
2193         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2194         if (!inflight_cmd) {
2195                 dma_unmap_single(dev, adapter->dump_data_token, len,
2196                                  DMA_FROM_DEVICE);
2197                 kfree(adapter->dump_data);
2198                 complete(&adapter->fw_done);
2199                 return;
2200         }
2201
2202         memset(&newcrq, 0, sizeof(newcrq));
2203         newcrq.request_dump.first = IBMVNIC_CRQ_CMD;
2204         newcrq.request_dump.cmd = REQUEST_DUMP;
2205         newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token);
2206         newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size);
2207
2208         memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq));
2209
2210         spin_lock_irqsave(&adapter->inflight_lock, flags);
2211         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2212         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2213
2214         ibmvnic_send_crq(adapter, &newcrq);
2215 }
2216
2217 static void handle_error_indication(union ibmvnic_crq *crq,
2218                                     struct ibmvnic_adapter *adapter)
2219 {
2220         int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2221         struct ibmvnic_inflight_cmd *inflight_cmd;
2222         struct device *dev = &adapter->vdev->dev;
2223         struct ibmvnic_error_buff *error_buff;
2224         union ibmvnic_crq new_crq;
2225         unsigned long flags;
2226
2227         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2228                 crq->error_indication.
2229                     flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2230                 crq->error_indication.error_id,
2231                 crq->error_indication.error_cause);
2232
2233         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2234         if (!error_buff)
2235                 return;
2236
2237         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2238         if (!error_buff->buff) {
2239                 kfree(error_buff);
2240                 return;
2241         }
2242
2243         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2244                                          DMA_FROM_DEVICE);
2245         if (dma_mapping_error(dev, error_buff->dma)) {
2246                 if (!firmware_has_feature(FW_FEATURE_CMO))
2247                         dev_err(dev, "Couldn't map error buffer\n");
2248                 kfree(error_buff->buff);
2249                 kfree(error_buff);
2250                 return;
2251         }
2252
2253         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2254         if (!inflight_cmd) {
2255                 dma_unmap_single(dev, error_buff->dma, detail_len,
2256                                  DMA_FROM_DEVICE);
2257                 kfree(error_buff->buff);
2258                 kfree(error_buff);
2259                 return;
2260         }
2261
2262         error_buff->len = detail_len;
2263         error_buff->error_id = crq->error_indication.error_id;
2264
2265         spin_lock_irqsave(&adapter->error_list_lock, flags);
2266         list_add_tail(&error_buff->list, &adapter->errors);
2267         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2268
2269         memset(&new_crq, 0, sizeof(new_crq));
2270         new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2271         new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2272         new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2273         new_crq.request_error_info.len = cpu_to_be32(detail_len);
2274         new_crq.request_error_info.error_id = crq->error_indication.error_id;
2275
2276         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2277
2278         spin_lock_irqsave(&adapter->inflight_lock, flags);
2279         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2280         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2281
2282         ibmvnic_send_crq(adapter, &new_crq);
2283 }
2284
2285 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2286                                   struct ibmvnic_adapter *adapter)
2287 {
2288         struct net_device *netdev = adapter->netdev;
2289         struct device *dev = &adapter->vdev->dev;
2290         long rc;
2291
2292         rc = crq->change_mac_addr_rsp.rc.code;
2293         if (rc) {
2294                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2295                 return;
2296         }
2297         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2298                ETH_ALEN);
2299 }
2300
2301 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2302                                    struct ibmvnic_adapter *adapter)
2303 {
2304         struct device *dev = &adapter->vdev->dev;
2305         u64 *req_value;
2306         char *name;
2307
2308         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2309         case REQ_TX_QUEUES:
2310                 req_value = &adapter->req_tx_queues;
2311                 name = "tx";
2312                 break;
2313         case REQ_RX_QUEUES:
2314                 req_value = &adapter->req_rx_queues;
2315                 name = "rx";
2316                 break;
2317         case REQ_RX_ADD_QUEUES:
2318                 req_value = &adapter->req_rx_add_queues;
2319                 name = "rx_add";
2320                 break;
2321         case REQ_TX_ENTRIES_PER_SUBCRQ:
2322                 req_value = &adapter->req_tx_entries_per_subcrq;
2323                 name = "tx_entries_per_subcrq";
2324                 break;
2325         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2326                 req_value = &adapter->req_rx_add_entries_per_subcrq;
2327                 name = "rx_add_entries_per_subcrq";
2328                 break;
2329         case REQ_MTU:
2330                 req_value = &adapter->req_mtu;
2331                 name = "mtu";
2332                 break;
2333         case PROMISC_REQUESTED:
2334                 req_value = &adapter->promisc;
2335                 name = "promisc";
2336                 break;
2337         default:
2338                 dev_err(dev, "Got invalid cap request rsp %d\n",
2339                         crq->request_capability.capability);
2340                 return;
2341         }
2342
2343         switch (crq->request_capability_rsp.rc.code) {
2344         case SUCCESS:
2345                 break;
2346         case PARTIALSUCCESS:
2347                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2348                          *req_value,
2349                          (long int)be32_to_cpu(crq->request_capability_rsp.
2350                                                number), name);
2351                 release_sub_crqs(adapter);
2352                 *req_value = be32_to_cpu(crq->request_capability_rsp.number);
2353                 complete(&adapter->init_done);
2354                 return;
2355         default:
2356                 dev_err(dev, "Error %d in request cap rsp\n",
2357                         crq->request_capability_rsp.rc.code);
2358                 return;
2359         }
2360
2361         /* Done receiving requested capabilities, query IP offload support */
2362         if (++adapter->requested_caps == 7) {
2363                 union ibmvnic_crq newcrq;
2364                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2365                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2366                     &adapter->ip_offload_buf;
2367
2368                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2369                                                          buf_sz,
2370                                                          DMA_FROM_DEVICE);
2371
2372                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2373                         if (!firmware_has_feature(FW_FEATURE_CMO))
2374                                 dev_err(dev, "Couldn't map offload buffer\n");
2375                         return;
2376                 }
2377
2378                 memset(&newcrq, 0, sizeof(newcrq));
2379                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2380                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2381                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2382                 newcrq.query_ip_offload.ioba =
2383                     cpu_to_be32(adapter->ip_offload_tok);
2384
2385                 ibmvnic_send_crq(adapter, &newcrq);
2386         }
2387 }
2388
2389 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2390                             struct ibmvnic_adapter *adapter)
2391 {
2392         struct device *dev = &adapter->vdev->dev;
2393         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2394         struct ibmvnic_login_buffer *login = adapter->login_buf;
2395         union ibmvnic_crq crq;
2396         int i;
2397
2398         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2399                          DMA_BIDIRECTIONAL);
2400         dma_unmap_single(dev, adapter->login_rsp_buf_token,
2401                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2402
2403         /* If the number of queues requested can't be allocated by the
2404          * server, the login response will return with code 1. We will need
2405          * to resend the login buffer with fewer queues requested.
2406          */
2407         if (login_rsp_crq->generic.rc.code) {
2408                 adapter->renegotiate = true;
2409                 complete(&adapter->init_done);
2410                 return 0;
2411         }
2412
2413         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2414         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2415                 netdev_dbg(adapter->netdev, "%016lx\n",
2416                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2417         }
2418
2419         /* Sanity checks */
2420         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2421             (be32_to_cpu(login->num_rxcomp_subcrqs) *
2422              adapter->req_rx_add_queues !=
2423              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2424                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2425                 ibmvnic_remove(adapter->vdev);
2426                 return -EIO;
2427         }
2428         complete(&adapter->init_done);
2429
2430         memset(&crq, 0, sizeof(crq));
2431         crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD;
2432         crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM;
2433         ibmvnic_send_crq(adapter, &crq);
2434
2435         return 0;
2436 }
2437
2438 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2439                                    struct ibmvnic_adapter *adapter)
2440 {
2441         struct device *dev = &adapter->vdev->dev;
2442         u8 map_id = crq->request_map_rsp.map_id;
2443         int tx_subcrqs;
2444         int rx_subcrqs;
2445         long rc;
2446         int i;
2447
2448         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2449         rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2450
2451         rc = crq->request_map_rsp.rc.code;
2452         if (rc) {
2453                 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2454                 adapter->map_id--;
2455                 /* need to find and zero tx/rx_pool map_id */
2456                 for (i = 0; i < tx_subcrqs; i++) {
2457                         if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2458                                 adapter->tx_pool[i].long_term_buff.map_id = 0;
2459                 }
2460                 for (i = 0; i < rx_subcrqs; i++) {
2461                         if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2462                                 adapter->rx_pool[i].long_term_buff.map_id = 0;
2463                 }
2464         }
2465         complete(&adapter->fw_done);
2466 }
2467
2468 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2469                                      struct ibmvnic_adapter *adapter)
2470 {
2471         struct device *dev = &adapter->vdev->dev;
2472         long rc;
2473
2474         rc = crq->request_unmap_rsp.rc.code;
2475         if (rc)
2476                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2477 }
2478
2479 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2480                                  struct ibmvnic_adapter *adapter)
2481 {
2482         struct net_device *netdev = adapter->netdev;
2483         struct device *dev = &adapter->vdev->dev;
2484         long rc;
2485
2486         rc = crq->query_map_rsp.rc.code;
2487         if (rc) {
2488                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2489                 return;
2490         }
2491         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2492                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2493                    crq->query_map_rsp.free_pages);
2494 }
2495
2496 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2497                                  struct ibmvnic_adapter *adapter)
2498 {
2499         struct net_device *netdev = adapter->netdev;
2500         struct device *dev = &adapter->vdev->dev;
2501         long rc;
2502
2503         atomic_dec(&adapter->running_cap_queries);
2504         netdev_dbg(netdev, "Outstanding queries: %d\n",
2505                    atomic_read(&adapter->running_cap_queries));
2506         rc = crq->query_capability.rc.code;
2507         if (rc) {
2508                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2509                 goto out;
2510         }
2511
2512         switch (be16_to_cpu(crq->query_capability.capability)) {
2513         case MIN_TX_QUEUES:
2514                 adapter->min_tx_queues =
2515                     be64_to_cpu(crq->query_capability.number);
2516                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2517                            adapter->min_tx_queues);
2518                 break;
2519         case MIN_RX_QUEUES:
2520                 adapter->min_rx_queues =
2521                     be64_to_cpu(crq->query_capability.number);
2522                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2523                            adapter->min_rx_queues);
2524                 break;
2525         case MIN_RX_ADD_QUEUES:
2526                 adapter->min_rx_add_queues =
2527                     be64_to_cpu(crq->query_capability.number);
2528                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2529                            adapter->min_rx_add_queues);
2530                 break;
2531         case MAX_TX_QUEUES:
2532                 adapter->max_tx_queues =
2533                     be64_to_cpu(crq->query_capability.number);
2534                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2535                            adapter->max_tx_queues);
2536                 break;
2537         case MAX_RX_QUEUES:
2538                 adapter->max_rx_queues =
2539                     be64_to_cpu(crq->query_capability.number);
2540                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2541                            adapter->max_rx_queues);
2542                 break;
2543         case MAX_RX_ADD_QUEUES:
2544                 adapter->max_rx_add_queues =
2545                     be64_to_cpu(crq->query_capability.number);
2546                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2547                            adapter->max_rx_add_queues);
2548                 break;
2549         case MIN_TX_ENTRIES_PER_SUBCRQ:
2550                 adapter->min_tx_entries_per_subcrq =
2551                     be64_to_cpu(crq->query_capability.number);
2552                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2553                            adapter->min_tx_entries_per_subcrq);
2554                 break;
2555         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2556                 adapter->min_rx_add_entries_per_subcrq =
2557                     be64_to_cpu(crq->query_capability.number);
2558                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2559                            adapter->min_rx_add_entries_per_subcrq);
2560                 break;
2561         case MAX_TX_ENTRIES_PER_SUBCRQ:
2562                 adapter->max_tx_entries_per_subcrq =
2563                     be64_to_cpu(crq->query_capability.number);
2564                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2565                            adapter->max_tx_entries_per_subcrq);
2566                 break;
2567         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2568                 adapter->max_rx_add_entries_per_subcrq =
2569                     be64_to_cpu(crq->query_capability.number);
2570                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2571                            adapter->max_rx_add_entries_per_subcrq);
2572                 break;
2573         case TCP_IP_OFFLOAD:
2574                 adapter->tcp_ip_offload =
2575                     be64_to_cpu(crq->query_capability.number);
2576                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2577                            adapter->tcp_ip_offload);
2578                 break;
2579         case PROMISC_SUPPORTED:
2580                 adapter->promisc_supported =
2581                     be64_to_cpu(crq->query_capability.number);
2582                 netdev_dbg(netdev, "promisc_supported = %lld\n",
2583                            adapter->promisc_supported);
2584                 break;
2585         case MIN_MTU:
2586                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
2587                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2588                 break;
2589         case MAX_MTU:
2590                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
2591                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2592                 break;
2593         case MAX_MULTICAST_FILTERS:
2594                 adapter->max_multicast_filters =
2595                     be64_to_cpu(crq->query_capability.number);
2596                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2597                            adapter->max_multicast_filters);
2598                 break;
2599         case VLAN_HEADER_INSERTION:
2600                 adapter->vlan_header_insertion =
2601                     be64_to_cpu(crq->query_capability.number);
2602                 if (adapter->vlan_header_insertion)
2603                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2604                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2605                            adapter->vlan_header_insertion);
2606                 break;
2607         case MAX_TX_SG_ENTRIES:
2608                 adapter->max_tx_sg_entries =
2609                     be64_to_cpu(crq->query_capability.number);
2610                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2611                            adapter->max_tx_sg_entries);
2612                 break;
2613         case RX_SG_SUPPORTED:
2614                 adapter->rx_sg_supported =
2615                     be64_to_cpu(crq->query_capability.number);
2616                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2617                            adapter->rx_sg_supported);
2618                 break;
2619         case OPT_TX_COMP_SUB_QUEUES:
2620                 adapter->opt_tx_comp_sub_queues =
2621                     be64_to_cpu(crq->query_capability.number);
2622                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2623                            adapter->opt_tx_comp_sub_queues);
2624                 break;
2625         case OPT_RX_COMP_QUEUES:
2626                 adapter->opt_rx_comp_queues =
2627                     be64_to_cpu(crq->query_capability.number);
2628                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2629                            adapter->opt_rx_comp_queues);
2630                 break;
2631         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2632                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
2633                     be64_to_cpu(crq->query_capability.number);
2634                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2635                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
2636                 break;
2637         case OPT_TX_ENTRIES_PER_SUBCRQ:
2638                 adapter->opt_tx_entries_per_subcrq =
2639                     be64_to_cpu(crq->query_capability.number);
2640                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2641                            adapter->opt_tx_entries_per_subcrq);
2642                 break;
2643         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2644                 adapter->opt_rxba_entries_per_subcrq =
2645                     be64_to_cpu(crq->query_capability.number);
2646                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2647                            adapter->opt_rxba_entries_per_subcrq);
2648                 break;
2649         case TX_RX_DESC_REQ:
2650                 adapter->tx_rx_desc_req = crq->query_capability.number;
2651                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2652                            adapter->tx_rx_desc_req);
2653                 break;
2654
2655         default:
2656                 netdev_err(netdev, "Got invalid cap rsp %d\n",
2657                            crq->query_capability.capability);
2658         }
2659
2660 out:
2661         if (atomic_read(&adapter->running_cap_queries) == 0)
2662                 complete(&adapter->init_done);
2663                 /* We're done querying the capabilities, initialize sub-crqs */
2664 }
2665
2666 static void handle_control_ras_rsp(union ibmvnic_crq *crq,
2667                                    struct ibmvnic_adapter *adapter)
2668 {
2669         u8 correlator = crq->control_ras_rsp.correlator;
2670         struct device *dev = &adapter->vdev->dev;
2671         bool found = false;
2672         int i;
2673
2674         if (crq->control_ras_rsp.rc.code) {
2675                 dev_warn(dev, "Control ras failed rc=%d\n",
2676                          crq->control_ras_rsp.rc.code);
2677                 return;
2678         }
2679
2680         for (i = 0; i < adapter->ras_comp_num; i++) {
2681                 if (adapter->ras_comps[i].correlator == correlator) {
2682                         found = true;
2683                         break;
2684                 }
2685         }
2686
2687         if (!found) {
2688                 dev_warn(dev, "Correlator not found on control_ras_rsp\n");
2689                 return;
2690         }
2691
2692         switch (crq->control_ras_rsp.op) {
2693         case IBMVNIC_TRACE_LEVEL:
2694                 adapter->ras_comps[i].trace_level = crq->control_ras.level;
2695                 break;
2696         case IBMVNIC_ERROR_LEVEL:
2697                 adapter->ras_comps[i].error_check_level =
2698                     crq->control_ras.level;
2699                 break;
2700         case IBMVNIC_TRACE_PAUSE:
2701                 adapter->ras_comp_int[i].paused = 1;
2702                 break;
2703         case IBMVNIC_TRACE_RESUME:
2704                 adapter->ras_comp_int[i].paused = 0;
2705                 break;
2706         case IBMVNIC_TRACE_ON:
2707                 adapter->ras_comps[i].trace_on = 1;
2708                 break;
2709         case IBMVNIC_TRACE_OFF:
2710                 adapter->ras_comps[i].trace_on = 0;
2711                 break;
2712         case IBMVNIC_CHG_TRACE_BUFF_SZ:
2713                 /* trace_buff_sz is 3 bytes, stuff it into an int */
2714                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0;
2715                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] =
2716                     crq->control_ras_rsp.trace_buff_sz[0];
2717                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] =
2718                     crq->control_ras_rsp.trace_buff_sz[1];
2719                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] =
2720                     crq->control_ras_rsp.trace_buff_sz[2];
2721                 break;
2722         default:
2723                 dev_err(dev, "invalid op %d on control_ras_rsp",
2724                         crq->control_ras_rsp.op);
2725         }
2726 }
2727
2728 static int ibmvnic_fw_comp_open(struct inode *inode, struct file *file)
2729 {
2730         file->private_data = inode->i_private;
2731         return 0;
2732 }
2733
2734 static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len,
2735                           loff_t *ppos)
2736 {
2737         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2738         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2739         struct device *dev = &adapter->vdev->dev;
2740         struct ibmvnic_fw_trace_entry *trace;
2741         int num = ras_comp_int->num;
2742         union ibmvnic_crq crq;
2743         dma_addr_t trace_tok;
2744
2745         if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2746                 return 0;
2747
2748         trace =
2749             dma_alloc_coherent(dev,
2750                                be32_to_cpu(adapter->ras_comps[num].
2751                                            trace_buff_size), &trace_tok,
2752                                GFP_KERNEL);
2753         if (!trace) {
2754                 dev_err(dev, "Couldn't alloc trace buffer\n");
2755                 return 0;
2756         }
2757
2758         memset(&crq, 0, sizeof(crq));
2759         crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD;
2760         crq.collect_fw_trace.cmd = COLLECT_FW_TRACE;
2761         crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator;
2762         crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok);
2763         crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size;
2764         ibmvnic_send_crq(adapter, &crq);
2765
2766         init_completion(&adapter->fw_done);
2767         wait_for_completion(&adapter->fw_done);
2768
2769         if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2770                 len =
2771                     be32_to_cpu(adapter->ras_comps[num].trace_buff_size) -
2772                     *ppos;
2773
2774         copy_to_user(user_buf, &((u8 *)trace)[*ppos], len);
2775
2776         dma_free_coherent(dev,
2777                           be32_to_cpu(adapter->ras_comps[num].trace_buff_size),
2778                           trace, trace_tok);
2779         *ppos += len;
2780         return len;
2781 }
2782
2783 static const struct file_operations trace_ops = {
2784         .owner          = THIS_MODULE,
2785         .open           = ibmvnic_fw_comp_open,
2786         .read           = trace_read,
2787 };
2788
2789 static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len,
2790                            loff_t *ppos)
2791 {
2792         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2793         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2794         int num = ras_comp_int->num;
2795         char buff[5]; /*  1 or 0 plus \n and \0 */
2796         int size;
2797
2798         size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused);
2799
2800         if (*ppos >= size)
2801                 return 0;
2802
2803         copy_to_user(user_buf, buff, size);
2804         *ppos += size;
2805         return size;
2806 }
2807
2808 static ssize_t paused_write(struct file *file, const char __user *user_buf,
2809                             size_t len, loff_t *ppos)
2810 {
2811         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2812         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2813         int num = ras_comp_int->num;
2814         union ibmvnic_crq crq;
2815         unsigned long val;
2816         char buff[9]; /* decimal max int plus \n and \0 */
2817
2818         copy_from_user(buff, user_buf, sizeof(buff));
2819         val = kstrtoul(buff, 10, NULL);
2820
2821         adapter->ras_comp_int[num].paused = val ? 1 : 0;
2822
2823         memset(&crq, 0, sizeof(crq));
2824         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2825         crq.control_ras.cmd = CONTROL_RAS;
2826         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2827         crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME;
2828         ibmvnic_send_crq(adapter, &crq);
2829
2830         return len;
2831 }
2832
2833 static const struct file_operations paused_ops = {
2834         .owner          = THIS_MODULE,
2835         .open           = ibmvnic_fw_comp_open,
2836         .read           = paused_read,
2837         .write          = paused_write,
2838 };
2839
2840 static ssize_t tracing_read(struct file *file, char __user *user_buf,
2841                             size_t len, loff_t *ppos)
2842 {
2843         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2844         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2845         int num = ras_comp_int->num;
2846         char buff[5]; /*  1 or 0 plus \n and \0 */
2847         int size;
2848
2849         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on);
2850
2851         if (*ppos >= size)
2852                 return 0;
2853
2854         copy_to_user(user_buf, buff, size);
2855         *ppos += size;
2856         return size;
2857 }
2858
2859 static ssize_t tracing_write(struct file *file, const char __user *user_buf,
2860                              size_t len, loff_t *ppos)
2861 {
2862         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2863         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2864         int num = ras_comp_int->num;
2865         union ibmvnic_crq crq;
2866         unsigned long val;
2867         char buff[9]; /* decimal max int plus \n and \0 */
2868
2869         copy_from_user(buff, user_buf, sizeof(buff));
2870         val = kstrtoul(buff, 10, NULL);
2871
2872         memset(&crq, 0, sizeof(crq));
2873         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2874         crq.control_ras.cmd = CONTROL_RAS;
2875         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2876         crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF;
2877
2878         return len;
2879 }
2880
2881 static const struct file_operations tracing_ops = {
2882         .owner          = THIS_MODULE,
2883         .open           = ibmvnic_fw_comp_open,
2884         .read           = tracing_read,
2885         .write          = tracing_write,
2886 };
2887
2888 static ssize_t error_level_read(struct file *file, char __user *user_buf,
2889                                 size_t len, loff_t *ppos)
2890 {
2891         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2892         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2893         int num = ras_comp_int->num;
2894         char buff[5]; /* decimal max char plus \n and \0 */
2895         int size;
2896
2897         size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level);
2898
2899         if (*ppos >= size)
2900                 return 0;
2901
2902         copy_to_user(user_buf, buff, size);
2903         *ppos += size;
2904         return size;
2905 }
2906
2907 static ssize_t error_level_write(struct file *file, const char __user *user_buf,
2908                                  size_t len, loff_t *ppos)
2909 {
2910         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2911         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2912         int num = ras_comp_int->num;
2913         union ibmvnic_crq crq;
2914         unsigned long val;
2915         char buff[9]; /* decimal max int plus \n and \0 */
2916
2917         copy_from_user(buff, user_buf, sizeof(buff));
2918         val = kstrtoul(buff, 10, NULL);
2919
2920         if (val > 9)
2921                 val = 9;
2922
2923         memset(&crq, 0, sizeof(crq));
2924         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2925         crq.control_ras.cmd = CONTROL_RAS;
2926         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2927         crq.control_ras.op = IBMVNIC_ERROR_LEVEL;
2928         crq.control_ras.level = val;
2929         ibmvnic_send_crq(adapter, &crq);
2930
2931         return len;
2932 }
2933
2934 static const struct file_operations error_level_ops = {
2935         .owner          = THIS_MODULE,
2936         .open           = ibmvnic_fw_comp_open,
2937         .read           = error_level_read,
2938         .write          = error_level_write,
2939 };
2940
2941 static ssize_t trace_level_read(struct file *file, char __user *user_buf,
2942                                 size_t len, loff_t *ppos)
2943 {
2944         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2945         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2946         int num = ras_comp_int->num;
2947         char buff[5]; /* decimal max char plus \n and \0 */
2948         int size;
2949
2950         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level);
2951         if (*ppos >= size)
2952                 return 0;
2953
2954         copy_to_user(user_buf, buff, size);
2955         *ppos += size;
2956         return size;
2957 }
2958
2959 static ssize_t trace_level_write(struct file *file, const char __user *user_buf,
2960                                  size_t len, loff_t *ppos)
2961 {
2962         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2963         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2964         union ibmvnic_crq crq;
2965         unsigned long val;
2966         char buff[9]; /* decimal max int plus \n and \0 */
2967
2968         copy_from_user(buff, user_buf, sizeof(buff));
2969         val = kstrtoul(buff, 10, NULL);
2970         if (val > 9)
2971                 val = 9;
2972
2973         memset(&crq, 0, sizeof(crq));
2974         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2975         crq.control_ras.cmd = CONTROL_RAS;
2976         crq.control_ras.correlator =
2977             adapter->ras_comps[ras_comp_int->num].correlator;
2978         crq.control_ras.op = IBMVNIC_TRACE_LEVEL;
2979         crq.control_ras.level = val;
2980         ibmvnic_send_crq(adapter, &crq);
2981
2982         return len;
2983 }
2984
2985 static const struct file_operations trace_level_ops = {
2986         .owner          = THIS_MODULE,
2987         .open           = ibmvnic_fw_comp_open,
2988         .read           = trace_level_read,
2989         .write          = trace_level_write,
2990 };
2991
2992 static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf,
2993                                     size_t len, loff_t *ppos)
2994 {
2995         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2996         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2997         int num = ras_comp_int->num;
2998         char buff[9]; /* decimal max int plus \n and \0 */
2999         int size;
3000
3001         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size);
3002         if (*ppos >= size)
3003                 return 0;
3004
3005         copy_to_user(user_buf, buff, size);
3006         *ppos += size;
3007         return size;
3008 }
3009
3010 static ssize_t trace_buff_size_write(struct file *file,
3011                                      const char __user *user_buf, size_t len,
3012                                      loff_t *ppos)
3013 {
3014         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3015         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3016         union ibmvnic_crq crq;
3017         unsigned long val;
3018         char buff[9]; /* decimal max int plus \n and \0 */
3019
3020         copy_from_user(buff, user_buf, sizeof(buff));
3021         val = kstrtoul(buff, 10, NULL);
3022
3023         memset(&crq, 0, sizeof(crq));
3024         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3025         crq.control_ras.cmd = CONTROL_RAS;
3026         crq.control_ras.correlator =
3027             adapter->ras_comps[ras_comp_int->num].correlator;
3028         crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ;
3029         /* trace_buff_sz is 3 bytes, stuff an int into it */
3030         crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5];
3031         crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6];
3032         crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7];
3033         ibmvnic_send_crq(adapter, &crq);
3034
3035         return len;
3036 }
3037
3038 static const struct file_operations trace_size_ops = {
3039         .owner          = THIS_MODULE,
3040         .open           = ibmvnic_fw_comp_open,
3041         .read           = trace_buff_size_read,
3042         .write          = trace_buff_size_write,
3043 };
3044
3045 static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq,
3046                                          struct ibmvnic_adapter *adapter)
3047 {
3048         struct device *dev = &adapter->vdev->dev;
3049         struct dentry *dir_ent;
3050         struct dentry *ent;
3051         int i;
3052
3053         debugfs_remove_recursive(adapter->ras_comps_ent);
3054
3055         adapter->ras_comps_ent = debugfs_create_dir("ras_comps",
3056                                                     adapter->debugfs_dir);
3057         if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) {
3058                 dev_info(dev, "debugfs create ras_comps dir failed\n");
3059                 return;
3060         }
3061
3062         for (i = 0; i < adapter->ras_comp_num; i++) {
3063                 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name,
3064                                              adapter->ras_comps_ent);
3065                 if (!dir_ent || IS_ERR(dir_ent)) {
3066                         dev_info(dev, "debugfs create %s dir failed\n",
3067                                  adapter->ras_comps[i].name);
3068                         continue;
3069                 }
3070
3071                 adapter->ras_comp_int[i].adapter = adapter;
3072                 adapter->ras_comp_int[i].num = i;
3073                 adapter->ras_comp_int[i].desc_blob.data =
3074                     &adapter->ras_comps[i].description;
3075                 adapter->ras_comp_int[i].desc_blob.size =
3076                     sizeof(adapter->ras_comps[i].description);
3077
3078                 /* Don't need to remember the dentry's because the debugfs dir
3079                  * gets removed recursively
3080                  */
3081                 ent = debugfs_create_blob("description", S_IRUGO, dir_ent,
3082                                           &adapter->ras_comp_int[i].desc_blob);
3083                 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR,
3084                                           dir_ent, &adapter->ras_comp_int[i],
3085                                           &trace_size_ops);
3086                 ent = debugfs_create_file("trace_level",
3087                                           S_IRUGO |
3088                                           (adapter->ras_comps[i].trace_level !=
3089                                            0xFF  ? S_IWUSR : 0),
3090                                            dir_ent, &adapter->ras_comp_int[i],
3091                                            &trace_level_ops);
3092                 ent = debugfs_create_file("error_level",
3093                                           S_IRUGO |
3094                                           (adapter->
3095                                            ras_comps[i].error_check_level !=
3096                                            0xFF ? S_IWUSR : 0),
3097                                           dir_ent, &adapter->ras_comp_int[i],
3098                                           &trace_level_ops);
3099                 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR,
3100                                           dir_ent, &adapter->ras_comp_int[i],
3101                                           &tracing_ops);
3102                 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR,
3103                                           dir_ent, &adapter->ras_comp_int[i],
3104                                           &paused_ops);
3105                 ent = debugfs_create_file("trace", S_IRUGO, dir_ent,
3106                                           &adapter->ras_comp_int[i],
3107                                           &trace_ops);
3108         }
3109 }
3110
3111 static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq,
3112                                             struct ibmvnic_adapter *adapter)
3113 {
3114         int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component);
3115         struct device *dev = &adapter->vdev->dev;
3116         union ibmvnic_crq newcrq;
3117
3118         adapter->ras_comps = dma_alloc_coherent(dev, len,
3119                                                 &adapter->ras_comps_tok,
3120                                                 GFP_KERNEL);
3121         if (!adapter->ras_comps) {
3122                 if (!firmware_has_feature(FW_FEATURE_CMO))
3123                         dev_err(dev, "Couldn't alloc fw comps buffer\n");
3124                 return;
3125         }
3126
3127         adapter->ras_comp_int = kmalloc(adapter->ras_comp_num *
3128                                         sizeof(struct ibmvnic_fw_comp_internal),
3129                                         GFP_KERNEL);
3130         if (!adapter->ras_comp_int)
3131                 dma_free_coherent(dev, len, adapter->ras_comps,
3132                                   adapter->ras_comps_tok);
3133
3134         memset(&newcrq, 0, sizeof(newcrq));
3135         newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD;
3136         newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS;
3137         newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok);
3138         newcrq.request_ras_comps.len = cpu_to_be32(len);
3139         ibmvnic_send_crq(adapter, &newcrq);
3140 }
3141
3142 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
3143 {
3144         struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1;
3145         struct device *dev = &adapter->vdev->dev;
3146         struct ibmvnic_error_buff *error_buff, *tmp2;
3147         unsigned long flags;
3148         unsigned long flags2;
3149
3150         spin_lock_irqsave(&adapter->inflight_lock, flags);
3151         list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) {
3152                 switch (inflight_cmd->crq.generic.cmd) {
3153                 case LOGIN:
3154                         dma_unmap_single(dev, adapter->login_buf_token,
3155                                          adapter->login_buf_sz,
3156                                          DMA_BIDIRECTIONAL);
3157                         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3158                                          adapter->login_rsp_buf_sz,
3159                                          DMA_BIDIRECTIONAL);
3160                         kfree(adapter->login_rsp_buf);
3161                         kfree(adapter->login_buf);
3162                         break;
3163                 case REQUEST_DUMP:
3164                         complete(&adapter->fw_done);
3165                         break;
3166                 case REQUEST_ERROR_INFO:
3167                         spin_lock_irqsave(&adapter->error_list_lock, flags2);
3168                         list_for_each_entry_safe(error_buff, tmp2,
3169                                                  &adapter->errors, list) {
3170                                 dma_unmap_single(dev, error_buff->dma,
3171                                                  error_buff->len,
3172                                                  DMA_FROM_DEVICE);
3173                                 kfree(error_buff->buff);
3174                                 list_del(&error_buff->list);
3175                                 kfree(error_buff);
3176                         }
3177                         spin_unlock_irqrestore(&adapter->error_list_lock,
3178                                                flags2);
3179                         break;
3180                 }
3181                 list_del(&inflight_cmd->list);
3182                 kfree(inflight_cmd);
3183         }
3184         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
3185 }
3186
3187 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3188                                struct ibmvnic_adapter *adapter)
3189 {
3190         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3191         struct net_device *netdev = adapter->netdev;
3192         struct device *dev = &adapter->vdev->dev;
3193         long rc;
3194
3195         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3196                    ((unsigned long int *)crq)[0],
3197                    ((unsigned long int *)crq)[1]);
3198         switch (gen_crq->first) {
3199         case IBMVNIC_CRQ_INIT_RSP:
3200                 switch (gen_crq->cmd) {
3201                 case IBMVNIC_CRQ_INIT:
3202                         dev_info(dev, "Partner initialized\n");
3203                         /* Send back a response */
3204                         rc = ibmvnic_send_crq_init_complete(adapter);
3205                         if (rc == 0)
3206                                 send_version_xchg(adapter);
3207                         else
3208                                 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
3209                         break;
3210                 case IBMVNIC_CRQ_INIT_COMPLETE:
3211                         dev_info(dev, "Partner initialization complete\n");
3212                         send_version_xchg(adapter);
3213                         break;
3214                 default:
3215                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3216                 }
3217                 return;
3218         case IBMVNIC_CRQ_XPORT_EVENT:
3219                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3220                         dev_info(dev, "Re-enabling adapter\n");
3221                         adapter->migrated = true;
3222                         ibmvnic_free_inflight(adapter);
3223                         release_sub_crqs(adapter);
3224                         rc = ibmvnic_reenable_crq_queue(adapter);
3225                         if (rc)
3226                                 dev_err(dev, "Error after enable rc=%ld\n", rc);
3227                         adapter->migrated = false;
3228                         rc = ibmvnic_send_crq_init(adapter);
3229                         if (rc)
3230                                 dev_err(dev, "Error sending init rc=%ld\n", rc);
3231                 } else {
3232                         /* The adapter lost the connection */
3233                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3234                                 gen_crq->cmd);
3235                         ibmvnic_free_inflight(adapter);
3236                         release_sub_crqs(adapter);
3237                 }
3238                 return;
3239         case IBMVNIC_CRQ_CMD_RSP:
3240                 break;
3241         default:
3242                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3243                         gen_crq->first);
3244                 return;
3245         }
3246
3247         switch (gen_crq->cmd) {
3248         case VERSION_EXCHANGE_RSP:
3249                 rc = crq->version_exchange_rsp.rc.code;
3250                 if (rc) {
3251                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3252                         break;
3253                 }
3254                 dev_info(dev, "Partner protocol version is %d\n",
3255                          crq->version_exchange_rsp.version);
3256                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3257                     ibmvnic_version)
3258                         ibmvnic_version =
3259                             be16_to_cpu(crq->version_exchange_rsp.version);
3260                 send_cap_queries(adapter);
3261                 break;
3262         case QUERY_CAPABILITY_RSP:
3263                 handle_query_cap_rsp(crq, adapter);
3264                 break;
3265         case QUERY_MAP_RSP:
3266                 handle_query_map_rsp(crq, adapter);
3267                 break;
3268         case REQUEST_MAP_RSP:
3269                 handle_request_map_rsp(crq, adapter);
3270                 break;
3271         case REQUEST_UNMAP_RSP:
3272                 handle_request_unmap_rsp(crq, adapter);
3273                 break;
3274         case REQUEST_CAPABILITY_RSP:
3275                 handle_request_cap_rsp(crq, adapter);
3276                 break;
3277         case LOGIN_RSP:
3278                 netdev_dbg(netdev, "Got Login Response\n");
3279                 handle_login_rsp(crq, adapter);
3280                 break;
3281         case LOGICAL_LINK_STATE_RSP:
3282                 netdev_dbg(netdev, "Got Logical Link State Response\n");
3283                 adapter->logical_link_state =
3284                     crq->logical_link_state_rsp.link_state;
3285                 break;
3286         case LINK_STATE_INDICATION:
3287                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3288                 adapter->phys_link_state =
3289                     crq->link_state_indication.phys_link_state;
3290                 adapter->logical_link_state =
3291                     crq->link_state_indication.logical_link_state;
3292                 break;
3293         case CHANGE_MAC_ADDR_RSP:
3294                 netdev_dbg(netdev, "Got MAC address change Response\n");
3295                 handle_change_mac_rsp(crq, adapter);
3296                 break;
3297         case ERROR_INDICATION:
3298                 netdev_dbg(netdev, "Got Error Indication\n");
3299                 handle_error_indication(crq, adapter);
3300                 break;
3301         case REQUEST_ERROR_RSP:
3302                 netdev_dbg(netdev, "Got Error Detail Response\n");
3303                 handle_error_info_rsp(crq, adapter);
3304                 break;
3305         case REQUEST_STATISTICS_RSP:
3306                 netdev_dbg(netdev, "Got Statistics Response\n");
3307                 complete(&adapter->stats_done);
3308                 break;
3309         case REQUEST_DUMP_SIZE_RSP:
3310                 netdev_dbg(netdev, "Got Request Dump Size Response\n");
3311                 handle_dump_size_rsp(crq, adapter);
3312                 break;
3313         case REQUEST_DUMP_RSP:
3314                 netdev_dbg(netdev, "Got Request Dump Response\n");
3315                 complete(&adapter->fw_done);
3316                 break;
3317         case QUERY_IP_OFFLOAD_RSP:
3318                 netdev_dbg(netdev, "Got Query IP offload Response\n");
3319                 handle_query_ip_offload_rsp(adapter);
3320                 break;
3321         case MULTICAST_CTRL_RSP:
3322                 netdev_dbg(netdev, "Got multicast control Response\n");
3323                 break;
3324         case CONTROL_IP_OFFLOAD_RSP:
3325                 netdev_dbg(netdev, "Got Control IP offload Response\n");
3326                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3327                                  sizeof(adapter->ip_offload_ctrl),
3328                                  DMA_TO_DEVICE);
3329                 /* We're done with the queries, perform the login */
3330                 send_login(adapter);
3331                 break;
3332         case REQUEST_RAS_COMP_NUM_RSP:
3333                 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n");
3334                 if (crq->request_ras_comp_num_rsp.rc.code == 10) {
3335                         netdev_dbg(netdev, "Request RAS Comp Num not supported\n");
3336                         break;
3337                 }
3338                 adapter->ras_comp_num =
3339                     be32_to_cpu(crq->request_ras_comp_num_rsp.num_components);
3340                 handle_request_ras_comp_num_rsp(crq, adapter);
3341                 break;
3342         case REQUEST_RAS_COMPS_RSP:
3343                 netdev_dbg(netdev, "Got Request RAS Comps Response\n");
3344                 handle_request_ras_comps_rsp(crq, adapter);
3345                 break;
3346         case CONTROL_RAS_RSP:
3347                 netdev_dbg(netdev, "Got Control RAS Response\n");
3348                 handle_control_ras_rsp(crq, adapter);
3349                 break;
3350         case COLLECT_FW_TRACE_RSP:
3351                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3352                 complete(&adapter->fw_done);
3353                 break;
3354         default:
3355                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3356                            gen_crq->cmd);
3357         }
3358 }
3359
3360 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3361 {
3362         struct ibmvnic_adapter *adapter = instance;
3363         struct ibmvnic_crq_queue *queue = &adapter->crq;
3364         struct vio_dev *vdev = adapter->vdev;
3365         union ibmvnic_crq *crq;
3366         unsigned long flags;
3367         bool done = false;
3368
3369         spin_lock_irqsave(&queue->lock, flags);
3370         vio_disable_interrupts(vdev);
3371         while (!done) {
3372                 /* Pull all the valid messages off the CRQ */
3373                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3374                         ibmvnic_handle_crq(crq, adapter);
3375                         crq->generic.first = 0;
3376                 }
3377                 vio_enable_interrupts(vdev);
3378                 crq = ibmvnic_next_crq(adapter);
3379                 if (crq) {
3380                         vio_disable_interrupts(vdev);
3381                         ibmvnic_handle_crq(crq, adapter);
3382                         crq->generic.first = 0;
3383                 } else {
3384                         done = true;
3385                 }
3386         }
3387         spin_unlock_irqrestore(&queue->lock, flags);
3388         return IRQ_HANDLED;
3389 }
3390
3391 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3392 {
3393         struct vio_dev *vdev = adapter->vdev;
3394         int rc;
3395
3396         do {
3397                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3398         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3399
3400         if (rc)
3401                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3402
3403         return rc;
3404 }
3405
3406 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3407 {
3408         struct ibmvnic_crq_queue *crq = &adapter->crq;
3409         struct device *dev = &adapter->vdev->dev;
3410         struct vio_dev *vdev = adapter->vdev;
3411         int rc;
3412
3413         /* Close the CRQ */
3414         do {
3415                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3416         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3417
3418         /* Clean out the queue */
3419         memset(crq->msgs, 0, PAGE_SIZE);
3420         crq->cur = 0;
3421
3422         /* And re-open it again */
3423         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3424                                 crq->msg_token, PAGE_SIZE);
3425
3426         if (rc == H_CLOSED)
3427                 /* Adapter is good, but other end is not ready */
3428                 dev_warn(dev, "Partner adapter not ready\n");
3429         else if (rc != 0)
3430                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3431
3432         return rc;
3433 }
3434
3435 static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter)
3436 {
3437         struct ibmvnic_crq_queue *crq = &adapter->crq;
3438         struct vio_dev *vdev = adapter->vdev;
3439         long rc;
3440
3441         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3442         free_irq(vdev->irq, adapter);
3443         do {
3444                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3445         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3446
3447         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3448                          DMA_BIDIRECTIONAL);
3449         free_page((unsigned long)crq->msgs);
3450 }
3451
3452 static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter)
3453 {
3454         struct ibmvnic_crq_queue *crq = &adapter->crq;
3455         struct device *dev = &adapter->vdev->dev;
3456         struct vio_dev *vdev = adapter->vdev;
3457         int rc, retrc = -ENOMEM;
3458
3459         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3460         /* Should we allocate more than one page? */
3461
3462         if (!crq->msgs)
3463                 return -ENOMEM;
3464
3465         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3466         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3467                                         DMA_BIDIRECTIONAL);
3468         if (dma_mapping_error(dev, crq->msg_token))
3469                 goto map_failed;
3470
3471         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3472                                 crq->msg_token, PAGE_SIZE);
3473
3474         if (rc == H_RESOURCE)
3475                 /* maybe kexecing and resource is busy. try a reset */
3476                 rc = ibmvnic_reset_crq(adapter);
3477         retrc = rc;
3478
3479         if (rc == H_CLOSED) {
3480                 dev_warn(dev, "Partner adapter not ready\n");
3481         } else if (rc) {
3482                 dev_warn(dev, "Error %d opening adapter\n", rc);
3483                 goto reg_crq_failed;
3484         }
3485
3486         retrc = 0;
3487
3488         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3489         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3490                          adapter);
3491         if (rc) {
3492                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3493                         vdev->irq, rc);
3494                 goto req_irq_failed;
3495         }
3496
3497         rc = vio_enable_interrupts(vdev);
3498         if (rc) {
3499                 dev_err(dev, "Error %d enabling interrupts\n", rc);
3500                 goto req_irq_failed;
3501         }
3502
3503         crq->cur = 0;
3504         spin_lock_init(&crq->lock);
3505
3506         return retrc;
3507
3508 req_irq_failed:
3509         do {
3510                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3511         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3512 reg_crq_failed:
3513         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3514 map_failed:
3515         free_page((unsigned long)crq->msgs);
3516         return retrc;
3517 }
3518
3519 /* debugfs for dump */
3520 static int ibmvnic_dump_show(struct seq_file *seq, void *v)
3521 {
3522         struct net_device *netdev = seq->private;
3523         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3524         struct device *dev = &adapter->vdev->dev;
3525         union ibmvnic_crq crq;
3526
3527         memset(&crq, 0, sizeof(crq));
3528         crq.request_dump_size.first = IBMVNIC_CRQ_CMD;
3529         crq.request_dump_size.cmd = REQUEST_DUMP_SIZE;
3530         ibmvnic_send_crq(adapter, &crq);
3531
3532         init_completion(&adapter->fw_done);
3533         wait_for_completion(&adapter->fw_done);
3534
3535         seq_write(seq, adapter->dump_data, adapter->dump_data_size);
3536
3537         dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size,
3538                          DMA_BIDIRECTIONAL);
3539
3540         kfree(adapter->dump_data);
3541
3542         return 0;
3543 }
3544
3545 static int ibmvnic_dump_open(struct inode *inode, struct file *file)
3546 {
3547         return single_open(file, ibmvnic_dump_show, inode->i_private);
3548 }
3549
3550 static const struct file_operations ibmvnic_dump_ops = {
3551         .owner          = THIS_MODULE,
3552         .open           = ibmvnic_dump_open,
3553         .read           = seq_read,
3554         .llseek         = seq_lseek,
3555         .release        = single_release,
3556 };
3557
3558 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3559 {
3560         struct ibmvnic_adapter *adapter;
3561         struct net_device *netdev;
3562         unsigned char *mac_addr_p;
3563         struct dentry *ent;
3564         char buf[16]; /* debugfs name buf */
3565         int rc;
3566
3567         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3568                 dev->unit_address);
3569
3570         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3571                                                         VETH_MAC_ADDR, NULL);
3572         if (!mac_addr_p) {
3573                 dev_err(&dev->dev,
3574                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3575                         __FILE__, __LINE__);
3576                 return 0;
3577         }
3578
3579         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3580                                    IBMVNIC_MAX_TX_QUEUES);
3581         if (!netdev)
3582                 return -ENOMEM;
3583
3584         adapter = netdev_priv(netdev);
3585         dev_set_drvdata(&dev->dev, netdev);
3586         adapter->vdev = dev;
3587         adapter->netdev = netdev;
3588
3589         ether_addr_copy(adapter->mac_addr, mac_addr_p);
3590         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3591         netdev->irq = dev->irq;
3592         netdev->netdev_ops = &ibmvnic_netdev_ops;
3593         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3594         SET_NETDEV_DEV(netdev, &dev->dev);
3595
3596         spin_lock_init(&adapter->stats_lock);
3597
3598         rc = ibmvnic_init_crq_queue(adapter);
3599         if (rc) {
3600                 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc);
3601                 goto free_netdev;
3602         }
3603
3604         INIT_LIST_HEAD(&adapter->errors);
3605         INIT_LIST_HEAD(&adapter->inflight);
3606         spin_lock_init(&adapter->error_list_lock);
3607         spin_lock_init(&adapter->inflight_lock);
3608
3609         adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats,
3610                                               sizeof(struct ibmvnic_statistics),
3611                                               DMA_FROM_DEVICE);
3612         if (dma_mapping_error(&dev->dev, adapter->stats_token)) {
3613                 if (!firmware_has_feature(FW_FEATURE_CMO))
3614                         dev_err(&dev->dev, "Couldn't map stats buffer\n");
3615                 goto free_crq;
3616         }
3617
3618         snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address);
3619         ent = debugfs_create_dir(buf, NULL);
3620         if (!ent || IS_ERR(ent)) {
3621                 dev_info(&dev->dev, "debugfs create directory failed\n");
3622                 adapter->debugfs_dir = NULL;
3623         } else {
3624                 adapter->debugfs_dir = ent;
3625                 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir,
3626                                           netdev, &ibmvnic_dump_ops);
3627                 if (!ent || IS_ERR(ent)) {
3628                         dev_info(&dev->dev,
3629                                  "debugfs create dump file failed\n");
3630                         adapter->debugfs_dump = NULL;
3631                 } else {
3632                         adapter->debugfs_dump = ent;
3633                 }
3634         }
3635         ibmvnic_send_crq_init(adapter);
3636
3637         init_completion(&adapter->init_done);
3638         wait_for_completion(&adapter->init_done);
3639
3640         do {
3641                 adapter->renegotiate = false;
3642
3643                 init_sub_crqs(adapter, 0);
3644                 reinit_completion(&adapter->init_done);
3645                 wait_for_completion(&adapter->init_done);
3646
3647                 if (adapter->renegotiate) {
3648                         release_sub_crqs(adapter);
3649                         send_cap_queries(adapter);
3650
3651                         reinit_completion(&adapter->init_done);
3652                         wait_for_completion(&adapter->init_done);
3653                 }
3654         } while (adapter->renegotiate);
3655
3656         /* if init_sub_crqs is partially successful, retry */
3657         while (!adapter->tx_scrq || !adapter->rx_scrq) {
3658                 init_sub_crqs(adapter, 1);
3659
3660                 reinit_completion(&adapter->init_done);
3661                 wait_for_completion(&adapter->init_done);
3662         }
3663
3664         netdev->real_num_tx_queues = adapter->req_tx_queues;
3665
3666         rc = register_netdev(netdev);
3667         if (rc) {
3668                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3669                 goto free_debugfs;
3670         }
3671         dev_info(&dev->dev, "ibmvnic registered\n");
3672
3673         return 0;
3674
3675 free_debugfs:
3676         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3677                 debugfs_remove_recursive(adapter->debugfs_dir);
3678 free_crq:
3679         ibmvnic_release_crq_queue(adapter);
3680 free_netdev:
3681         free_netdev(netdev);
3682         return rc;
3683 }
3684
3685 static int ibmvnic_remove(struct vio_dev *dev)
3686 {
3687         struct net_device *netdev = dev_get_drvdata(&dev->dev);
3688         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3689
3690         unregister_netdev(netdev);
3691
3692         release_sub_crqs(adapter);
3693
3694         ibmvnic_release_crq_queue(adapter);
3695
3696         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3697                 debugfs_remove_recursive(adapter->debugfs_dir);
3698
3699         if (adapter->ras_comps)
3700                 dma_free_coherent(&dev->dev,
3701                                   adapter->ras_comp_num *
3702                                   sizeof(struct ibmvnic_fw_component),
3703                                   adapter->ras_comps, adapter->ras_comps_tok);
3704
3705         kfree(adapter->ras_comp_int);
3706
3707         free_netdev(netdev);
3708         dev_set_drvdata(&dev->dev, NULL);
3709
3710         return 0;
3711 }
3712
3713 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3714 {
3715         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3716         struct ibmvnic_adapter *adapter;
3717         struct iommu_table *tbl;
3718         unsigned long ret = 0;
3719         int i;
3720
3721         tbl = get_iommu_table_base(&vdev->dev);
3722
3723         /* netdev inits at probe time along with the structures we need below*/
3724         if (!netdev)
3725                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3726
3727         adapter = netdev_priv(netdev);
3728
3729         ret += PAGE_SIZE; /* the crq message queue */
3730         ret += adapter->bounce_buffer_size;
3731         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3732
3733         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3734                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3735
3736         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3737              i++)
3738                 ret += adapter->rx_pool[i].size *
3739                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3740
3741         return ret;
3742 }
3743
3744 static int ibmvnic_resume(struct device *dev)
3745 {
3746         struct net_device *netdev = dev_get_drvdata(dev);
3747         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3748         int i;
3749
3750         /* kick the interrupt handlers just in case we lost an interrupt */
3751         for (i = 0; i < adapter->req_rx_queues; i++)
3752                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3753                                      adapter->rx_scrq[i]);
3754
3755         return 0;
3756 }
3757
3758 static struct vio_device_id ibmvnic_device_table[] = {
3759         {"network", "IBM,vnic"},
3760         {"", "" }
3761 };
3762 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3763
3764 static const struct dev_pm_ops ibmvnic_pm_ops = {
3765         .resume = ibmvnic_resume
3766 };
3767
3768 static struct vio_driver ibmvnic_driver = {
3769         .id_table       = ibmvnic_device_table,
3770         .probe          = ibmvnic_probe,
3771         .remove         = ibmvnic_remove,
3772         .get_desired_dma = ibmvnic_get_desired_dma,
3773         .name           = ibmvnic_driver_name,
3774         .pm             = &ibmvnic_pm_ops,
3775 };
3776
3777 /* module functions */
3778 static int __init ibmvnic_module_init(void)
3779 {
3780         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3781                 IBMVNIC_DRIVER_VERSION);
3782
3783         return vio_register_driver(&ibmvnic_driver);
3784 }
3785
3786 static void __exit ibmvnic_module_exit(void)
3787 {
3788         vio_unregister_driver(&ibmvnic_driver);
3789 }
3790
3791 module_init(ibmvnic_module_init);
3792 module_exit(ibmvnic_module_exit);