drivers/net/vmxnet3/vmxnet3_int.h

   1 /*
   2  * Linux driver for VMware's vmxnet3 ethernet NIC.
   3  *
   4  * Copyright (C) 2008-2016, VMware, Inc. All Rights Reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; version 2 of the License and no later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  13  * NON INFRINGEMENT.  See the GNU General Public License for more
  14  * details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * The full GNU General Public License is included in this distribution in
  21  * the file called "COPYING".
  22  *
  23  * Maintained by: pv-drivers@vmware.com
  24  *
  25  */
  26
  27 #ifndef _VMXNET3_INT_H
  28 #define _VMXNET3_INT_H
  29
  30 #include <linux/bitops.h>
  31 #include <linux/ethtool.h>
  32 #include <linux/delay.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/pci.h>
  35 #include <linux/compiler.h>
  36 #include <linux/slab.h>
  37 #include <linux/spinlock.h>
  38 #include <linux/ioport.h>
  39 #include <linux/highmem.h>
  40 #include <linux/timer.h>
  41 #include <linux/skbuff.h>
  42 #include <linux/interrupt.h>
  43 #include <linux/workqueue.h>
  44 #include <linux/uaccess.h>
  45 #include <asm/dma.h>
  46 #include <asm/page.h>
  47
  48 #include <linux/tcp.h>
  49 #include <linux/udp.h>
  50 #include <linux/ip.h>
  51 #include <linux/ipv6.h>
  52 #include <linux/in.h>
  53 #include <linux/etherdevice.h>
  54 #include <asm/checksum.h>
  55 #include <linux/if_vlan.h>
  56 #include <linux/if_arp.h>
  57 #include <linux/inetdevice.h>
  58 #include <linux/log2.h>
  59
  60 #include "vmxnet3_defs.h"
  61
  62 #ifdef DEBUG
  63 # define VMXNET3_DRIVER_VERSION_REPORT VMXNET3_DRIVER_VERSION_STRING"-NAPI(debug)"
  64 #else
  65 # define VMXNET3_DRIVER_VERSION_REPORT VMXNET3_DRIVER_VERSION_STRING"-NAPI"
  66 #endif
  67
  68
  69 /*
  70  * Version numbers
  71  */
  72 #define VMXNET3_DRIVER_VERSION_STRING   "1.4.13.0-k"
  73
  74 /* a 32-bit int, each byte encode a verion number in VMXNET3_DRIVER_VERSION */
  75 #define VMXNET3_DRIVER_VERSION_NUM      0x01040d00
  76
  77 #if defined(CONFIG_PCI_MSI)
  78         /* RSS only makes sense if MSI-X is supported. */
  79         #define VMXNET3_RSS
  80 #endif
  81
  82 #define VMXNET3_REV_3           2       /* Vmxnet3 Rev. 3 */
  83 #define VMXNET3_REV_2           1       /* Vmxnet3 Rev. 2 */
  84 #define VMXNET3_REV_1           0       /* Vmxnet3 Rev. 1 */
  85
  86 /*
  87  * Capabilities
  88  */
  89
  90 enum {
  91         VMNET_CAP_SG            = 0x0001, /* Can do scatter-gather transmits. */
  92         VMNET_CAP_IP4_CSUM      = 0x0002, /* Can checksum only TCP/UDP over
  93                                            * IPv4 */
  94         VMNET_CAP_HW_CSUM       = 0x0004, /* Can checksum all packets. */
  95         VMNET_CAP_HIGH_DMA      = 0x0008, /* Can DMA to high memory. */
  96         VMNET_CAP_TOE           = 0x0010, /* Supports TCP/IP offload. */
  97         VMNET_CAP_TSO           = 0x0020, /* Supports TCP Segmentation
  98                                            * offload */
  99         VMNET_CAP_SW_TSO        = 0x0040, /* Supports SW TCP Segmentation */
 100         VMNET_CAP_VMXNET_APROM  = 0x0080, /* Vmxnet APROM support */
 101         VMNET_CAP_HW_TX_VLAN    = 0x0100, /* Can we do VLAN tagging in HW */
 102         VMNET_CAP_HW_RX_VLAN    = 0x0200, /* Can we do VLAN untagging in HW */
 103         VMNET_CAP_SW_VLAN       = 0x0400, /* VLAN tagging/untagging in SW */
 104         VMNET_CAP_WAKE_PCKT_RCV = 0x0800, /* Can wake on network packet recv? */
 105         VMNET_CAP_ENABLE_INT_INLINE = 0x1000,  /* Enable Interrupt Inline */
 106         VMNET_CAP_ENABLE_HEADER_COPY = 0x2000,  /* copy header for vmkernel */
 107         VMNET_CAP_TX_CHAIN      = 0x4000, /* Guest can use multiple tx entries
 108                                           * for a pkt */
 109         VMNET_CAP_RX_CHAIN      = 0x8000, /* pkt can span multiple rx entries */
 110         VMNET_CAP_LPD           = 0x10000, /* large pkt delivery */
 111         VMNET_CAP_BPF           = 0x20000, /* BPF Support in VMXNET Virtual HW*/
 112         VMNET_CAP_SG_SPAN_PAGES = 0x40000, /* Scatter-gather can span multiple*/
 113                                            /* pages transmits */
 114         VMNET_CAP_IP6_CSUM      = 0x80000, /* Can do IPv6 csum offload. */
 115         VMNET_CAP_TSO6         = 0x100000, /* TSO seg. offload for IPv6 pkts. */
 116         VMNET_CAP_TSO256k      = 0x200000, /* Can do TSO seg offload for */
 117                                            /* pkts up to 256kB. */
 118         VMNET_CAP_UPT          = 0x400000  /* Support UPT */
 119 };
 120
 121 /*
 122  * Maximum devices supported.
 123  */
 124 #define MAX_ETHERNET_CARDS              10
 125 #define MAX_PCI_PASSTHRU_DEVICE         6
 126
 127 struct vmxnet3_cmd_ring {
 128         union Vmxnet3_GenericDesc *base;
 129         u32             size;
 130         u32             next2fill;
 131         u32             next2comp;
 132         u8              gen;
 133         dma_addr_t      basePA;
 134 };
 135
 136 static inline void
 137 vmxnet3_cmd_ring_adv_next2fill(struct vmxnet3_cmd_ring *ring)
 138 {
 139         ring->next2fill++;
 140         if (unlikely(ring->next2fill == ring->size)) {
 141                 ring->next2fill = 0;
 142                 VMXNET3_FLIP_RING_GEN(ring->gen);
 143         }
 144 }
 145
 146 static inline void
 147 vmxnet3_cmd_ring_adv_next2comp(struct vmxnet3_cmd_ring *ring)
 148 {
 149         VMXNET3_INC_RING_IDX_ONLY(ring->next2comp, ring->size);
 150 }
 151
 152 static inline int
 153 vmxnet3_cmd_ring_desc_avail(struct vmxnet3_cmd_ring *ring)
 154 {
 155         return (ring->next2comp > ring->next2fill ? 0 : ring->size) +
 156                 ring->next2comp - ring->next2fill - 1;
 157 }
 158
 159 struct vmxnet3_comp_ring {
 160         union Vmxnet3_GenericDesc *base;
 161         u32               size;
 162         u32               next2proc;
 163         u8                gen;
 164         u8                intr_idx;
 165         dma_addr_t           basePA;
 166 };
 167
 168 static inline void
 169 vmxnet3_comp_ring_adv_next2proc(struct vmxnet3_comp_ring *ring)
 170 {
 171         ring->next2proc++;
 172         if (unlikely(ring->next2proc == ring->size)) {
 173                 ring->next2proc = 0;
 174                 VMXNET3_FLIP_RING_GEN(ring->gen);
 175         }
 176 }
 177
 178 struct vmxnet3_tx_data_ring {
 179         struct Vmxnet3_TxDataDesc *base;
 180         u32              size;
 181         dma_addr_t          basePA;
 182 };
 183
 184 enum vmxnet3_buf_map_type {
 185         VMXNET3_MAP_INVALID = 0,
 186         VMXNET3_MAP_NONE,
 187         VMXNET3_MAP_SINGLE,
 188         VMXNET3_MAP_PAGE,
 189 };
 190
 191 struct vmxnet3_tx_buf_info {
 192         u32      map_type;
 193         u16      len;
 194         u16      sop_idx;
 195         dma_addr_t  dma_addr;
 196         struct sk_buff *skb;
 197 };
 198
 199 struct vmxnet3_tq_driver_stats {
 200         u64 drop_total;     /* # of pkts dropped by the driver, the
 201                                 * counters below track droppings due to
 202                                 * different reasons
 203                                 */
 204         u64 drop_too_many_frags;
 205         u64 drop_oversized_hdr;
 206         u64 drop_hdr_inspect_err;
 207         u64 drop_tso;
 208
 209         u64 tx_ring_full;
 210         u64 linearized;         /* # of pkts linearized */
 211         u64 copy_skb_header;    /* # of times we have to copy skb header */
 212         u64 oversized_hdr;
 213 };
 214
 215 struct vmxnet3_tx_ctx {
 216         bool   ipv4;
 217         bool   ipv6;
 218         u16 mss;
 219         u32 eth_ip_hdr_size; /* only valid for pkts requesting tso or csum
 220                                  * offloading
 221                                  */
 222         u32 l4_hdr_size;     /* only valid if mss != 0 */
 223         u32 copy_size;       /* # of bytes copied into the data ring */
 224         union Vmxnet3_GenericDesc *sop_txd;
 225         union Vmxnet3_GenericDesc *eop_txd;
 226 };
 227
 228 struct vmxnet3_tx_queue {
 229         char                    name[IFNAMSIZ+8]; /* To identify interrupt */
 230         struct vmxnet3_adapter          *adapter;
 231         spinlock_t                      tx_lock;
 232         struct vmxnet3_cmd_ring         tx_ring;
 233         struct vmxnet3_tx_buf_info      *buf_info;
 234         dma_addr_t                       buf_info_pa;
 235         struct vmxnet3_tx_data_ring     data_ring;
 236         struct vmxnet3_comp_ring        comp_ring;
 237         struct Vmxnet3_TxQueueCtrl      *shared;
 238         struct vmxnet3_tq_driver_stats  stats;
 239         bool                            stopped;
 240         int                             num_stop;  /* # of times the queue is
 241                                                     * stopped */
 242         int                             qid;
 243         u16                             txdata_desc_size;
 244 } __attribute__((__aligned__(SMP_CACHE_BYTES)));
 245
 246 enum vmxnet3_rx_buf_type {
 247         VMXNET3_RX_BUF_NONE = 0,
 248         VMXNET3_RX_BUF_SKB = 1,
 249         VMXNET3_RX_BUF_PAGE = 2
 250 };
 251
 252 struct vmxnet3_rx_buf_info {
 253         enum vmxnet3_rx_buf_type buf_type;
 254         u16     len;
 255         union {
 256                 struct sk_buff *skb;
 257                 struct page    *page;
 258         };
 259         dma_addr_t dma_addr;
 260 };
 261
 262 struct vmxnet3_rx_ctx {
 263         struct sk_buff *skb;
 264         u32 sop_idx;
 265 };
 266
 267 struct vmxnet3_rq_driver_stats {
 268         u64 drop_total;
 269         u64 drop_err;
 270         u64 drop_fcs;
 271         u64 rx_buf_alloc_failure;
 272 };
 273
 274 struct vmxnet3_rx_data_ring {
 275         Vmxnet3_RxDataDesc *base;
 276         dma_addr_t basePA;
 277         u16 desc_size;
 278 };
 279
 280 struct vmxnet3_rx_queue {
 281         char                    name[IFNAMSIZ + 8]; /* To identify interrupt */
 282         struct vmxnet3_adapter    *adapter;
 283         struct napi_struct        napi;
 284         struct vmxnet3_cmd_ring   rx_ring[2];
 285         struct vmxnet3_rx_data_ring data_ring;
 286         struct vmxnet3_comp_ring  comp_ring;
 287         struct vmxnet3_rx_ctx     rx_ctx;
 288         u32 qid;            /* rqID in RCD for buffer from 1st ring */
 289         u32 qid2;           /* rqID in RCD for buffer from 2nd ring */
 290         u32 dataRingQid;    /* rqID in RCD for buffer from data ring */
 291         struct vmxnet3_rx_buf_info     *buf_info[2];
 292         dma_addr_t                      buf_info_pa;
 293         struct Vmxnet3_RxQueueCtrl            *shared;
 294         struct vmxnet3_rq_driver_stats  stats;
 295 } __attribute__((__aligned__(SMP_CACHE_BYTES)));
 296
 297 #define VMXNET3_DEVICE_MAX_TX_QUEUES 8
 298 #define VMXNET3_DEVICE_MAX_RX_QUEUES 8   /* Keep this value as a power of 2 */
 299
 300 /* Should be less than UPT1_RSS_MAX_IND_TABLE_SIZE */
 301 #define VMXNET3_RSS_IND_TABLE_SIZE (VMXNET3_DEVICE_MAX_RX_QUEUES * 4)
 302
 303 #define VMXNET3_LINUX_MAX_MSIX_VECT     (VMXNET3_DEVICE_MAX_TX_QUEUES + \
 304                                          VMXNET3_DEVICE_MAX_RX_QUEUES + 1)
 305 #define VMXNET3_LINUX_MIN_MSIX_VECT     2 /* 1 for tx-rx pair and 1 for event */
 306
 307
 308 struct vmxnet3_intr {
 309         enum vmxnet3_intr_mask_mode  mask_mode;
 310         enum vmxnet3_intr_type       type;      /* MSI-X, MSI, or INTx? */
 311         u8  num_intrs;                  /* # of intr vectors */
 312         u8  event_intr_idx;             /* idx of the intr vector for event */
 313         u8  mod_levels[VMXNET3_LINUX_MAX_MSIX_VECT]; /* moderation level */
 314         char    event_msi_vector_name[IFNAMSIZ+17];
 315 #ifdef CONFIG_PCI_MSI
 316         struct msix_entry msix_entries[VMXNET3_LINUX_MAX_MSIX_VECT];
 317 #endif
 318 };
 319
 320 /* Interrupt sharing schemes, share_intr */
 321 #define VMXNET3_INTR_BUDDYSHARE 0    /* Corresponding tx,rx queues share irq */
 322 #define VMXNET3_INTR_TXSHARE 1       /* All tx queues share one irq */
 323 #define VMXNET3_INTR_DONTSHARE 2     /* each queue has its own irq */
 324
 325
 326 #define VMXNET3_STATE_BIT_RESETTING   0
 327 #define VMXNET3_STATE_BIT_QUIESCED    1
 328 struct vmxnet3_adapter {
 329         struct vmxnet3_tx_queue         tx_queue[VMXNET3_DEVICE_MAX_TX_QUEUES];
 330         struct vmxnet3_rx_queue         rx_queue[VMXNET3_DEVICE_MAX_RX_QUEUES];
 331         unsigned long                   active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
 332         struct vmxnet3_intr             intr;
 333         spinlock_t                      cmd_lock;
 334         struct Vmxnet3_DriverShared     *shared;
 335         struct Vmxnet3_PMConf           *pm_conf;
 336         struct Vmxnet3_TxQueueDesc      *tqd_start;     /* all tx queue desc */
 337         struct Vmxnet3_RxQueueDesc      *rqd_start;     /* all rx queue desc */
 338         struct net_device               *netdev;
 339         struct pci_dev                  *pdev;
 340
 341         u8                      __iomem *hw_addr0; /* for BAR 0 */
 342         u8                      __iomem *hw_addr1; /* for BAR 1 */
 343         u8                              version;
 344
 345 #ifdef VMXNET3_RSS
 346         struct UPT1_RSSConf             *rss_conf;
 347         bool                            rss;
 348 #endif
 349         u32                             num_rx_queues;
 350         u32                             num_tx_queues;
 351
 352         /* rx buffer related */
 353         unsigned                        skb_buf_size;
 354         int             rx_buf_per_pkt;  /* only apply to the 1st ring */
 355         dma_addr_t                      shared_pa;
 356         dma_addr_t queue_desc_pa;
 357         dma_addr_t coal_conf_pa;
 358
 359         /* Wake-on-LAN */
 360         u32     wol;
 361
 362         /* Link speed */
 363         u32     link_speed; /* in mbps */
 364
 365         u64     tx_timeout_count;
 366
 367         /* Ring sizes */
 368         u32 tx_ring_size;
 369         u32 rx_ring_size;
 370         u32 rx_ring2_size;
 371
 372         /* Size of buffer in the data ring */
 373         u16 txdata_desc_size;
 374         u16 rxdata_desc_size;
 375
 376         bool rxdataring_enabled;
 377
 378         struct work_struct work;
 379
 380         unsigned long  state;    /* VMXNET3_STATE_BIT_xxx */
 381
 382         int share_intr;
 383
 384         struct Vmxnet3_CoalesceScheme *coal_conf;
 385         bool   default_coal_mode;
 386
 387         dma_addr_t adapter_pa;
 388         dma_addr_t pm_conf_pa;
 389         dma_addr_t rss_conf_pa;
 390 };
 391
 392 #define VMXNET3_WRITE_BAR0_REG(adapter, reg, val)  \
 393         writel((val), (adapter)->hw_addr0 + (reg))
 394 #define VMXNET3_READ_BAR0_REG(adapter, reg)        \
 395         readl((adapter)->hw_addr0 + (reg))
 396
 397 #define VMXNET3_WRITE_BAR1_REG(adapter, reg, val)  \
 398         writel((val), (adapter)->hw_addr1 + (reg))
 399 #define VMXNET3_READ_BAR1_REG(adapter, reg)        \
 400         readl((adapter)->hw_addr1 + (reg))
 401
 402 #define VMXNET3_WAKE_QUEUE_THRESHOLD(tq)  (5)
 403 #define VMXNET3_RX_ALLOC_THRESHOLD(rq, ring_idx, adapter) \
 404         ((rq)->rx_ring[ring_idx].size >> 3)
 405
 406 #define VMXNET3_GET_ADDR_LO(dma)   ((u32)(dma))
 407 #define VMXNET3_GET_ADDR_HI(dma)   ((u32)(((u64)(dma)) >> 32))
 408
 409 #define VMXNET3_VERSION_GE_2(adapter) \
 410         (adapter->version >= VMXNET3_REV_2 + 1)
 411 #define VMXNET3_VERSION_GE_3(adapter) \
 412         (adapter->version >= VMXNET3_REV_3 + 1)
 413
 414 /* must be a multiple of VMXNET3_RING_SIZE_ALIGN */
 415 #define VMXNET3_DEF_TX_RING_SIZE    512
 416 #define VMXNET3_DEF_RX_RING_SIZE    1024
 417 #define VMXNET3_DEF_RX_RING2_SIZE   256
 418
 419 #define VMXNET3_DEF_RXDATA_DESC_SIZE 128
 420
 421 #define VMXNET3_MAX_ETH_HDR_SIZE    22
 422 #define VMXNET3_MAX_SKB_BUF_SIZE    (3*1024)
 423
 424 #define VMXNET3_GET_RING_IDX(adapter, rqID)             \
 425         ((rqID >= adapter->num_rx_queues &&             \
 426          rqID < 2 * adapter->num_rx_queues) ? 1 : 0)    \
 427
 428 #define VMXNET3_RX_DATA_RING(adapter, rqID)             \
 429         (rqID >= 2 * adapter->num_rx_queues &&          \
 430         rqID < 3 * adapter->num_rx_queues)              \
 431
 432 #define VMXNET3_COAL_STATIC_DEFAULT_DEPTH       64
 433
 434 #define VMXNET3_COAL_RBC_RATE(usecs) (1000000 / usecs)
 435 #define VMXNET3_COAL_RBC_USECS(rbc_rate) (1000000 / rbc_rate)
 436
 437 int
 438 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter);
 439
 440 int
 441 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter);
 442
 443 void
 444 vmxnet3_force_close(struct vmxnet3_adapter *adapter);
 445
 446 void
 447 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter);
 448
 449 void
 450 vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter);
 451
 452 void
 453 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter);
 454
 455 int
 456 vmxnet3_set_features(struct net_device *netdev, netdev_features_t features);
 457
 458 int
 459 vmxnet3_create_queues(struct vmxnet3_adapter *adapter,
 460                       u32 tx_ring_size, u32 rx_ring_size, u32 rx_ring2_size,
 461                       u16 txdata_desc_size, u16 rxdata_desc_size);
 462
 463 void vmxnet3_set_ethtool_ops(struct net_device *netdev);
 464
 465 void vmxnet3_get_stats64(struct net_device *dev,
 466                          struct rtnl_link_stats64 *stats);
 467
 468 extern char vmxnet3_driver_name[];
 469 #endif