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   "1.4.16.0-k"
  73
  74 /* Each byte of this 32-bit integer encodes a version number in
  75  * VMXNET3_DRIVER_VERSION_STRING.
  76  */
  77 #define VMXNET3_DRIVER_VERSION_NUM      0x01041000
  78
  79 #if defined(CONFIG_PCI_MSI)
  80         /* RSS only makes sense if MSI-X is supported. */
  81         #define VMXNET3_RSS
  82 #endif
  83
  84 #define VMXNET3_REV_3           2       /* Vmxnet3 Rev. 3 */
  85 #define VMXNET3_REV_2           1       /* Vmxnet3 Rev. 2 */
  86 #define VMXNET3_REV_1           0       /* Vmxnet3 Rev. 1 */
  87
  88 /*
  89  * Capabilities
  90  */
  91
  92 enum {
  93         VMNET_CAP_SG            = 0x0001, /* Can do scatter-gather transmits. */
  94         VMNET_CAP_IP4_CSUM      = 0x0002, /* Can checksum only TCP/UDP over
  95                                            * IPv4 */
  96         VMNET_CAP_HW_CSUM       = 0x0004, /* Can checksum all packets. */
  97         VMNET_CAP_HIGH_DMA      = 0x0008, /* Can DMA to high memory. */
  98         VMNET_CAP_TOE           = 0x0010, /* Supports TCP/IP offload. */
  99         VMNET_CAP_TSO           = 0x0020, /* Supports TCP Segmentation
 100                                            * offload */
 101         VMNET_CAP_SW_TSO        = 0x0040, /* Supports SW TCP Segmentation */
 102         VMNET_CAP_VMXNET_APROM  = 0x0080, /* Vmxnet APROM support */
 103         VMNET_CAP_HW_TX_VLAN    = 0x0100, /* Can we do VLAN tagging in HW */
 104         VMNET_CAP_HW_RX_VLAN    = 0x0200, /* Can we do VLAN untagging in HW */
 105         VMNET_CAP_SW_VLAN       = 0x0400, /* VLAN tagging/untagging in SW */
 106         VMNET_CAP_WAKE_PCKT_RCV = 0x0800, /* Can wake on network packet recv? */
 107         VMNET_CAP_ENABLE_INT_INLINE = 0x1000,  /* Enable Interrupt Inline */
 108         VMNET_CAP_ENABLE_HEADER_COPY = 0x2000,  /* copy header for vmkernel */
 109         VMNET_CAP_TX_CHAIN      = 0x4000, /* Guest can use multiple tx entries
 110                                           * for a pkt */
 111         VMNET_CAP_RX_CHAIN      = 0x8000, /* pkt can span multiple rx entries */
 112         VMNET_CAP_LPD           = 0x10000, /* large pkt delivery */
 113         VMNET_CAP_BPF           = 0x20000, /* BPF Support in VMXNET Virtual HW*/
 114         VMNET_CAP_SG_SPAN_PAGES = 0x40000, /* Scatter-gather can span multiple*/
 115                                            /* pages transmits */
 116         VMNET_CAP_IP6_CSUM      = 0x80000, /* Can do IPv6 csum offload. */
 117         VMNET_CAP_TSO6         = 0x100000, /* TSO seg. offload for IPv6 pkts. */
 118         VMNET_CAP_TSO256k      = 0x200000, /* Can do TSO seg offload for */
 119                                            /* pkts up to 256kB. */
 120         VMNET_CAP_UPT          = 0x400000  /* Support UPT */
 121 };
 122
 123 /*
 124  * Maximum devices supported.
 125  */
 126 #define MAX_ETHERNET_CARDS              10
 127 #define MAX_PCI_PASSTHRU_DEVICE         6
 128
 129 struct vmxnet3_cmd_ring {
 130         union Vmxnet3_GenericDesc *base;
 131         u32             size;
 132         u32             next2fill;
 133         u32             next2comp;
 134         u8              gen;
 135         dma_addr_t      basePA;
 136 };
 137
 138 static inline void
 139 vmxnet3_cmd_ring_adv_next2fill(struct vmxnet3_cmd_ring *ring)
 140 {
 141         ring->next2fill++;
 142         if (unlikely(ring->next2fill == ring->size)) {
 143                 ring->next2fill = 0;
 144                 VMXNET3_FLIP_RING_GEN(ring->gen);
 145         }
 146 }
 147
 148 static inline void
 149 vmxnet3_cmd_ring_adv_next2comp(struct vmxnet3_cmd_ring *ring)
 150 {
 151         VMXNET3_INC_RING_IDX_ONLY(ring->next2comp, ring->size);
 152 }
 153
 154 static inline int
 155 vmxnet3_cmd_ring_desc_avail(struct vmxnet3_cmd_ring *ring)
 156 {
 157         return (ring->next2comp > ring->next2fill ? 0 : ring->size) +
 158                 ring->next2comp - ring->next2fill - 1;
 159 }
 160
 161 struct vmxnet3_comp_ring {
 162         union Vmxnet3_GenericDesc *base;
 163         u32               size;
 164         u32               next2proc;
 165         u8                gen;
 166         u8                intr_idx;
 167         dma_addr_t           basePA;
 168 };
 169
 170 static inline void
 171 vmxnet3_comp_ring_adv_next2proc(struct vmxnet3_comp_ring *ring)
 172 {
 173         ring->next2proc++;
 174         if (unlikely(ring->next2proc == ring->size)) {
 175                 ring->next2proc = 0;
 176                 VMXNET3_FLIP_RING_GEN(ring->gen);
 177         }
 178 }
 179
 180 struct vmxnet3_tx_data_ring {
 181         struct Vmxnet3_TxDataDesc *base;
 182         u32              size;
 183         dma_addr_t          basePA;
 184 };
 185
 186 enum vmxnet3_buf_map_type {
 187         VMXNET3_MAP_INVALID = 0,
 188         VMXNET3_MAP_NONE,
 189         VMXNET3_MAP_SINGLE,
 190         VMXNET3_MAP_PAGE,
 191 };
 192
 193 struct vmxnet3_tx_buf_info {
 194         u32      map_type;
 195         u16      len;
 196         u16      sop_idx;
 197         dma_addr_t  dma_addr;
 198         struct sk_buff *skb;
 199 };
 200
 201 struct vmxnet3_tq_driver_stats {
 202         u64 drop_total;     /* # of pkts dropped by the driver, the
 203                                 * counters below track droppings due to
 204                                 * different reasons
 205                                 */
 206         u64 drop_too_many_frags;
 207         u64 drop_oversized_hdr;
 208         u64 drop_hdr_inspect_err;
 209         u64 drop_tso;
 210
 211         u64 tx_ring_full;
 212         u64 linearized;         /* # of pkts linearized */
 213         u64 copy_skb_header;    /* # of times we have to copy skb header */
 214         u64 oversized_hdr;
 215 };
 216
 217 struct vmxnet3_tx_ctx {
 218         bool   ipv4;
 219         bool   ipv6;
 220         u16 mss;
 221         u32 eth_ip_hdr_size; /* only valid for pkts requesting tso or csum
 222                                  * offloading
 223                                  */
 224         u32 l4_hdr_size;     /* only valid if mss != 0 */
 225         u32 copy_size;       /* # of bytes copied into the data ring */
 226         union Vmxnet3_GenericDesc *sop_txd;
 227         union Vmxnet3_GenericDesc *eop_txd;
 228 };
 229
 230 struct vmxnet3_tx_queue {
 231         char                    name[IFNAMSIZ+8]; /* To identify interrupt */
 232         struct vmxnet3_adapter          *adapter;
 233         spinlock_t                      tx_lock;
 234         struct vmxnet3_cmd_ring         tx_ring;
 235         struct vmxnet3_tx_buf_info      *buf_info;
 236         dma_addr_t                       buf_info_pa;
 237         struct vmxnet3_tx_data_ring     data_ring;
 238         struct vmxnet3_comp_ring        comp_ring;
 239         struct Vmxnet3_TxQueueCtrl      *shared;
 240         struct vmxnet3_tq_driver_stats  stats;
 241         bool                            stopped;
 242         int                             num_stop;  /* # of times the queue is
 243                                                     * stopped */
 244         int                             qid;
 245         u16                             txdata_desc_size;
 246 } __attribute__((__aligned__(SMP_CACHE_BYTES)));
 247
 248 enum vmxnet3_rx_buf_type {
 249         VMXNET3_RX_BUF_NONE = 0,
 250         VMXNET3_RX_BUF_SKB = 1,
 251         VMXNET3_RX_BUF_PAGE = 2
 252 };
 253
 254 struct vmxnet3_rx_buf_info {
 255         enum vmxnet3_rx_buf_type buf_type;
 256         u16     len;
 257         union {
 258                 struct sk_buff *skb;
 259                 struct page    *page;
 260         };
 261         dma_addr_t dma_addr;
 262 };
 263
 264 struct vmxnet3_rx_ctx {
 265         struct sk_buff *skb;
 266         u32 sop_idx;
 267 };
 268
 269 struct vmxnet3_rq_driver_stats {
 270         u64 drop_total;
 271         u64 drop_err;
 272         u64 drop_fcs;
 273         u64 rx_buf_alloc_failure;
 274 };
 275
 276 struct vmxnet3_rx_data_ring {
 277         Vmxnet3_RxDataDesc *base;
 278         dma_addr_t basePA;
 279         u16 desc_size;
 280 };
 281
 282 struct vmxnet3_rx_queue {
 283         char                    name[IFNAMSIZ + 8]; /* To identify interrupt */
 284         struct vmxnet3_adapter    *adapter;
 285         struct napi_struct        napi;
 286         struct vmxnet3_cmd_ring   rx_ring[2];
 287         struct vmxnet3_rx_data_ring data_ring;
 288         struct vmxnet3_comp_ring  comp_ring;
 289         struct vmxnet3_rx_ctx     rx_ctx;
 290         u32 qid;            /* rqID in RCD for buffer from 1st ring */
 291         u32 qid2;           /* rqID in RCD for buffer from 2nd ring */
 292         u32 dataRingQid;    /* rqID in RCD for buffer from data ring */
 293         struct vmxnet3_rx_buf_info     *buf_info[2];
 294         dma_addr_t                      buf_info_pa;
 295         struct Vmxnet3_RxQueueCtrl            *shared;
 296         struct vmxnet3_rq_driver_stats  stats;
 297 } __attribute__((__aligned__(SMP_CACHE_BYTES)));
 298
 299 #define VMXNET3_DEVICE_MAX_TX_QUEUES 8
 300 #define VMXNET3_DEVICE_MAX_RX_QUEUES 8   /* Keep this value as a power of 2 */
 301
 302 /* Should be less than UPT1_RSS_MAX_IND_TABLE_SIZE */
 303 #define VMXNET3_RSS_IND_TABLE_SIZE (VMXNET3_DEVICE_MAX_RX_QUEUES * 4)
 304
 305 #define VMXNET3_LINUX_MAX_MSIX_VECT     (VMXNET3_DEVICE_MAX_TX_QUEUES + \
 306                                          VMXNET3_DEVICE_MAX_RX_QUEUES + 1)
 307 #define VMXNET3_LINUX_MIN_MSIX_VECT     2 /* 1 for tx-rx pair and 1 for event */
 308
 309
 310 struct vmxnet3_intr {
 311         enum vmxnet3_intr_mask_mode  mask_mode;
 312         enum vmxnet3_intr_type       type;      /* MSI-X, MSI, or INTx? */
 313         u8  num_intrs;                  /* # of intr vectors */
 314         u8  event_intr_idx;             /* idx of the intr vector for event */
 315         u8  mod_levels[VMXNET3_LINUX_MAX_MSIX_VECT]; /* moderation level */
 316         char    event_msi_vector_name[IFNAMSIZ+17];
 317 #ifdef CONFIG_PCI_MSI
 318         struct msix_entry msix_entries[VMXNET3_LINUX_MAX_MSIX_VECT];
 319 #endif
 320 };
 321
 322 /* Interrupt sharing schemes, share_intr */
 323 #define VMXNET3_INTR_BUDDYSHARE 0    /* Corresponding tx,rx queues share irq */
 324 #define VMXNET3_INTR_TXSHARE 1       /* All tx queues share one irq */
 325 #define VMXNET3_INTR_DONTSHARE 2     /* each queue has its own irq */
 326
 327
 328 #define VMXNET3_STATE_BIT_RESETTING   0
 329 #define VMXNET3_STATE_BIT_QUIESCED    1
 330 struct vmxnet3_adapter {
 331         struct vmxnet3_tx_queue         tx_queue[VMXNET3_DEVICE_MAX_TX_QUEUES];
 332         struct vmxnet3_rx_queue         rx_queue[VMXNET3_DEVICE_MAX_RX_QUEUES];
 333         unsigned long                   active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
 334         struct vmxnet3_intr             intr;
 335         spinlock_t                      cmd_lock;
 336         struct Vmxnet3_DriverShared     *shared;
 337         struct Vmxnet3_PMConf           *pm_conf;
 338         struct Vmxnet3_TxQueueDesc      *tqd_start;     /* all tx queue desc */
 339         struct Vmxnet3_RxQueueDesc      *rqd_start;     /* all rx queue desc */
 340         struct net_device               *netdev;
 341         struct pci_dev                  *pdev;
 342
 343         u8                      __iomem *hw_addr0; /* for BAR 0 */
 344         u8                      __iomem *hw_addr1; /* for BAR 1 */
 345         u8                              version;
 346
 347 #ifdef VMXNET3_RSS
 348         struct UPT1_RSSConf             *rss_conf;
 349         bool                            rss;
 350 #endif
 351         u32                             num_rx_queues;
 352         u32                             num_tx_queues;
 353
 354         /* rx buffer related */
 355         unsigned                        skb_buf_size;
 356         int             rx_buf_per_pkt;  /* only apply to the 1st ring */
 357         dma_addr_t                      shared_pa;
 358         dma_addr_t queue_desc_pa;
 359         dma_addr_t coal_conf_pa;
 360
 361         /* Wake-on-LAN */
 362         u32     wol;
 363
 364         /* Link speed */
 365         u32     link_speed; /* in mbps */
 366
 367         u64     tx_timeout_count;
 368
 369         /* Ring sizes */
 370         u32 tx_ring_size;
 371         u32 rx_ring_size;
 372         u32 rx_ring2_size;
 373
 374         /* Size of buffer in the data ring */
 375         u16 txdata_desc_size;
 376         u16 rxdata_desc_size;
 377
 378         bool rxdataring_enabled;
 379
 380         struct work_struct work;
 381
 382         unsigned long  state;    /* VMXNET3_STATE_BIT_xxx */
 383
 384         int share_intr;
 385
 386         struct Vmxnet3_CoalesceScheme *coal_conf;
 387         bool   default_coal_mode;
 388
 389         dma_addr_t adapter_pa;
 390         dma_addr_t pm_conf_pa;
 391         dma_addr_t rss_conf_pa;
 392 };
 393
 394 #define VMXNET3_WRITE_BAR0_REG(adapter, reg, val)  \
 395         writel((val), (adapter)->hw_addr0 + (reg))
 396 #define VMXNET3_READ_BAR0_REG(adapter, reg)        \
 397         readl((adapter)->hw_addr0 + (reg))
 398
 399 #define VMXNET3_WRITE_BAR1_REG(adapter, reg, val)  \
 400         writel((val), (adapter)->hw_addr1 + (reg))
 401 #define VMXNET3_READ_BAR1_REG(adapter, reg)        \
 402         readl((adapter)->hw_addr1 + (reg))
 403
 404 #define VMXNET3_WAKE_QUEUE_THRESHOLD(tq)  (5)
 405 #define VMXNET3_RX_ALLOC_THRESHOLD(rq, ring_idx, adapter) \
 406         ((rq)->rx_ring[ring_idx].size >> 3)
 407
 408 #define VMXNET3_GET_ADDR_LO(dma)   ((u32)(dma))
 409 #define VMXNET3_GET_ADDR_HI(dma)   ((u32)(((u64)(dma)) >> 32))
 410
 411 #define VMXNET3_VERSION_GE_2(adapter) \
 412         (adapter->version >= VMXNET3_REV_2 + 1)
 413 #define VMXNET3_VERSION_GE_3(adapter) \
 414         (adapter->version >= VMXNET3_REV_3 + 1)
 415
 416 /* must be a multiple of VMXNET3_RING_SIZE_ALIGN */
 417 #define VMXNET3_DEF_TX_RING_SIZE    512
 418 #define VMXNET3_DEF_RX_RING_SIZE    1024
 419 #define VMXNET3_DEF_RX_RING2_SIZE   256
 420
 421 #define VMXNET3_DEF_RXDATA_DESC_SIZE 128
 422
 423 #define VMXNET3_MAX_ETH_HDR_SIZE    22
 424 #define VMXNET3_MAX_SKB_BUF_SIZE    (3*1024)
 425
 426 #define VMXNET3_GET_RING_IDX(adapter, rqID)             \
 427         ((rqID >= adapter->num_rx_queues &&             \
 428          rqID < 2 * adapter->num_rx_queues) ? 1 : 0)    \
 429
 430 #define VMXNET3_RX_DATA_RING(adapter, rqID)             \
 431         (rqID >= 2 * adapter->num_rx_queues &&          \
 432         rqID < 3 * adapter->num_rx_queues)              \
 433
 434 #define VMXNET3_COAL_STATIC_DEFAULT_DEPTH       64
 435
 436 #define VMXNET3_COAL_RBC_RATE(usecs) (1000000 / usecs)
 437 #define VMXNET3_COAL_RBC_USECS(rbc_rate) (1000000 / rbc_rate)
 438
 439 int
 440 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter);
 441
 442 int
 443 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter);
 444
 445 void
 446 vmxnet3_force_close(struct vmxnet3_adapter *adapter);
 447
 448 void
 449 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter);
 450
 451 void
 452 vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter);
 453
 454 void
 455 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter);
 456
 457 int
 458 vmxnet3_set_features(struct net_device *netdev, netdev_features_t features);
 459
 460 int
 461 vmxnet3_create_queues(struct vmxnet3_adapter *adapter,
 462                       u32 tx_ring_size, u32 rx_ring_size, u32 rx_ring2_size,
 463                       u16 txdata_desc_size, u16 rxdata_desc_size);
 464
 465 void vmxnet3_set_ethtool_ops(struct net_device *netdev);
 466
 467 void vmxnet3_get_stats64(struct net_device *dev,
 468                          struct rtnl_link_stats64 *stats);
 469
 470 extern char vmxnet3_driver_name[];
 471 #endif