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   "1.4.8.0-k"
  73
  74 /* a 32-bit int, each byte encode a verion number in VMXNET3_DRIVER_VERSION */
  75 #define VMXNET3_DRIVER_VERSION_NUM      0x01040800
  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  * PCI vendor and device IDs.
 123  */
 124 #define PCI_DEVICE_ID_VMWARE_VMXNET3    0x07B0
 125 #define MAX_ETHERNET_CARDS              10
 126 #define MAX_PCI_PASSTHRU_DEVICE         6
 127
 128 struct vmxnet3_cmd_ring {
 129         union Vmxnet3_GenericDesc *base;
 130         u32             size;
 131         u32             next2fill;
 132         u32             next2comp;
 133         u8              gen;
 134         dma_addr_t      basePA;
 135 };
 136
 137 static inline void
 138 vmxnet3_cmd_ring_adv_next2fill(struct vmxnet3_cmd_ring *ring)
 139 {
 140         ring->next2fill++;
 141         if (unlikely(ring->next2fill == ring->size)) {
 142                 ring->next2fill = 0;
 143                 VMXNET3_FLIP_RING_GEN(ring->gen);
 144         }
 145 }
 146
 147 static inline void
 148 vmxnet3_cmd_ring_adv_next2comp(struct vmxnet3_cmd_ring *ring)
 149 {
 150         VMXNET3_INC_RING_IDX_ONLY(ring->next2comp, ring->size);
 151 }
 152
 153 static inline int
 154 vmxnet3_cmd_ring_desc_avail(struct vmxnet3_cmd_ring *ring)
 155 {
 156         return (ring->next2comp > ring->next2fill ? 0 : ring->size) +
 157                 ring->next2comp - ring->next2fill - 1;
 158 }
 159
 160 struct vmxnet3_comp_ring {
 161         union Vmxnet3_GenericDesc *base;
 162         u32               size;
 163         u32               next2proc;
 164         u8                gen;
 165         u8                intr_idx;
 166         dma_addr_t           basePA;
 167 };
 168
 169 static inline void
 170 vmxnet3_comp_ring_adv_next2proc(struct vmxnet3_comp_ring *ring)
 171 {
 172         ring->next2proc++;
 173         if (unlikely(ring->next2proc == ring->size)) {
 174                 ring->next2proc = 0;
 175                 VMXNET3_FLIP_RING_GEN(ring->gen);
 176         }
 177 }
 178
 179 struct vmxnet3_tx_data_ring {
 180         struct Vmxnet3_TxDataDesc *base;
 181         u32              size;
 182         dma_addr_t          basePA;
 183 };
 184
 185 enum vmxnet3_buf_map_type {
 186         VMXNET3_MAP_INVALID = 0,
 187         VMXNET3_MAP_NONE,
 188         VMXNET3_MAP_SINGLE,
 189         VMXNET3_MAP_PAGE,
 190 };
 191
 192 struct vmxnet3_tx_buf_info {
 193         u32      map_type;
 194         u16      len;
 195         u16      sop_idx;
 196         dma_addr_t  dma_addr;
 197         struct sk_buff *skb;
 198 };
 199
 200 struct vmxnet3_tq_driver_stats {
 201         u64 drop_total;     /* # of pkts dropped by the driver, the
 202                                 * counters below track droppings due to
 203                                 * different reasons
 204                                 */
 205         u64 drop_too_many_frags;
 206         u64 drop_oversized_hdr;
 207         u64 drop_hdr_inspect_err;
 208         u64 drop_tso;
 209
 210         u64 tx_ring_full;
 211         u64 linearized;         /* # of pkts linearized */
 212         u64 copy_skb_header;    /* # of times we have to copy skb header */
 213         u64 oversized_hdr;
 214 };
 215
 216 struct vmxnet3_tx_ctx {
 217         bool   ipv4;
 218         bool   ipv6;
 219         u16 mss;
 220         u32 eth_ip_hdr_size; /* only valid for pkts requesting tso or csum
 221                                  * offloading
 222                                  */
 223         u32 l4_hdr_size;     /* only valid if mss != 0 */
 224         u32 copy_size;       /* # of bytes copied into the data ring */
 225         union Vmxnet3_GenericDesc *sop_txd;
 226         union Vmxnet3_GenericDesc *eop_txd;
 227 };
 228
 229 struct vmxnet3_tx_queue {
 230         char                    name[IFNAMSIZ+8]; /* To identify interrupt */
 231         struct vmxnet3_adapter          *adapter;
 232         spinlock_t                      tx_lock;
 233         struct vmxnet3_cmd_ring         tx_ring;
 234         struct vmxnet3_tx_buf_info      *buf_info;
 235         dma_addr_t                       buf_info_pa;
 236         struct vmxnet3_tx_data_ring     data_ring;
 237         struct vmxnet3_comp_ring        comp_ring;
 238         struct Vmxnet3_TxQueueCtrl      *shared;
 239         struct vmxnet3_tq_driver_stats  stats;
 240         bool                            stopped;
 241         int                             num_stop;  /* # of times the queue is
 242                                                     * stopped */
 243         int                             qid;
 244         u16                             txdata_desc_size;
 245 } __attribute__((__aligned__(SMP_CACHE_BYTES)));
 246
 247 enum vmxnet3_rx_buf_type {
 248         VMXNET3_RX_BUF_NONE = 0,
 249         VMXNET3_RX_BUF_SKB = 1,
 250         VMXNET3_RX_BUF_PAGE = 2
 251 };
 252
 253 struct vmxnet3_rx_buf_info {
 254         enum vmxnet3_rx_buf_type buf_type;
 255         u16     len;
 256         union {
 257                 struct sk_buff *skb;
 258                 struct page    *page;
 259         };
 260         dma_addr_t dma_addr;
 261 };
 262
 263 struct vmxnet3_rx_ctx {
 264         struct sk_buff *skb;
 265         u32 sop_idx;
 266 };
 267
 268 struct vmxnet3_rq_driver_stats {
 269         u64 drop_total;
 270         u64 drop_err;
 271         u64 drop_fcs;
 272         u64 rx_buf_alloc_failure;
 273 };
 274
 275 struct vmxnet3_rx_queue {
 276         char                    name[IFNAMSIZ + 8]; /* To identify interrupt */
 277         struct vmxnet3_adapter    *adapter;
 278         struct napi_struct        napi;
 279         struct vmxnet3_cmd_ring   rx_ring[2];
 280         struct vmxnet3_comp_ring  comp_ring;
 281         struct vmxnet3_rx_ctx     rx_ctx;
 282         u32 qid;            /* rqID in RCD for buffer from 1st ring */
 283         u32 qid2;           /* rqID in RCD for buffer from 2nd ring */
 284         struct vmxnet3_rx_buf_info     *buf_info[2];
 285         dma_addr_t                      buf_info_pa;
 286         struct Vmxnet3_RxQueueCtrl            *shared;
 287         struct vmxnet3_rq_driver_stats  stats;
 288 } __attribute__((__aligned__(SMP_CACHE_BYTES)));
 289
 290 #define VMXNET3_DEVICE_MAX_TX_QUEUES 8
 291 #define VMXNET3_DEVICE_MAX_RX_QUEUES 8   /* Keep this value as a power of 2 */
 292
 293 /* Should be less than UPT1_RSS_MAX_IND_TABLE_SIZE */
 294 #define VMXNET3_RSS_IND_TABLE_SIZE (VMXNET3_DEVICE_MAX_RX_QUEUES * 4)
 295
 296 #define VMXNET3_LINUX_MAX_MSIX_VECT     (VMXNET3_DEVICE_MAX_TX_QUEUES + \
 297                                          VMXNET3_DEVICE_MAX_RX_QUEUES + 1)
 298 #define VMXNET3_LINUX_MIN_MSIX_VECT     2 /* 1 for tx-rx pair and 1 for event */
 299
 300
 301 struct vmxnet3_intr {
 302         enum vmxnet3_intr_mask_mode  mask_mode;
 303         enum vmxnet3_intr_type       type;      /* MSI-X, MSI, or INTx? */
 304         u8  num_intrs;                  /* # of intr vectors */
 305         u8  event_intr_idx;             /* idx of the intr vector for event */
 306         u8  mod_levels[VMXNET3_LINUX_MAX_MSIX_VECT]; /* moderation level */
 307         char    event_msi_vector_name[IFNAMSIZ+11];
 308 #ifdef CONFIG_PCI_MSI
 309         struct msix_entry msix_entries[VMXNET3_LINUX_MAX_MSIX_VECT];
 310 #endif
 311 };
 312
 313 /* Interrupt sharing schemes, share_intr */
 314 #define VMXNET3_INTR_BUDDYSHARE 0    /* Corresponding tx,rx queues share irq */
 315 #define VMXNET3_INTR_TXSHARE 1       /* All tx queues share one irq */
 316 #define VMXNET3_INTR_DONTSHARE 2     /* each queue has its own irq */
 317
 318
 319 #define VMXNET3_STATE_BIT_RESETTING   0
 320 #define VMXNET3_STATE_BIT_QUIESCED    1
 321 struct vmxnet3_adapter {
 322         struct vmxnet3_tx_queue         tx_queue[VMXNET3_DEVICE_MAX_TX_QUEUES];
 323         struct vmxnet3_rx_queue         rx_queue[VMXNET3_DEVICE_MAX_RX_QUEUES];
 324         unsigned long                   active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
 325         struct vmxnet3_intr             intr;
 326         spinlock_t                      cmd_lock;
 327         struct Vmxnet3_DriverShared     *shared;
 328         struct Vmxnet3_PMConf           *pm_conf;
 329         struct Vmxnet3_TxQueueDesc      *tqd_start;     /* all tx queue desc */
 330         struct Vmxnet3_RxQueueDesc      *rqd_start;     /* all rx queue desc */
 331         struct net_device               *netdev;
 332         struct pci_dev                  *pdev;
 333
 334         u8                      __iomem *hw_addr0; /* for BAR 0 */
 335         u8                      __iomem *hw_addr1; /* for BAR 1 */
 336         u8                              version;
 337
 338         bool                            rxcsum;
 339         bool                            lro;
 340
 341 #ifdef VMXNET3_RSS
 342         struct UPT1_RSSConf             *rss_conf;
 343         bool                            rss;
 344 #endif
 345         u32                             num_rx_queues;
 346         u32                             num_tx_queues;
 347
 348         /* rx buffer related */
 349         unsigned                        skb_buf_size;
 350         int             rx_buf_per_pkt;  /* only apply to the 1st ring */
 351         dma_addr_t                      shared_pa;
 352         dma_addr_t queue_desc_pa;
 353
 354         /* Wake-on-LAN */
 355         u32     wol;
 356
 357         /* Link speed */
 358         u32     link_speed; /* in mbps */
 359
 360         u64     tx_timeout_count;
 361
 362         /* Ring sizes */
 363         u32 tx_ring_size;
 364         u32 rx_ring_size;
 365         u32 rx_ring2_size;
 366
 367         /* Size of buffer in the data ring */
 368         u16 txdata_desc_size;
 369
 370         struct work_struct work;
 371
 372         unsigned long  state;    /* VMXNET3_STATE_BIT_xxx */
 373
 374         int share_intr;
 375
 376         dma_addr_t adapter_pa;
 377         dma_addr_t pm_conf_pa;
 378         dma_addr_t rss_conf_pa;
 379 };
 380
 381 #define VMXNET3_WRITE_BAR0_REG(adapter, reg, val)  \
 382         writel((val), (adapter)->hw_addr0 + (reg))
 383 #define VMXNET3_READ_BAR0_REG(adapter, reg)        \
 384         readl((adapter)->hw_addr0 + (reg))
 385
 386 #define VMXNET3_WRITE_BAR1_REG(adapter, reg, val)  \
 387         writel((val), (adapter)->hw_addr1 + (reg))
 388 #define VMXNET3_READ_BAR1_REG(adapter, reg)        \
 389         readl((adapter)->hw_addr1 + (reg))
 390
 391 #define VMXNET3_WAKE_QUEUE_THRESHOLD(tq)  (5)
 392 #define VMXNET3_RX_ALLOC_THRESHOLD(rq, ring_idx, adapter) \
 393         ((rq)->rx_ring[ring_idx].size >> 3)
 394
 395 #define VMXNET3_GET_ADDR_LO(dma)   ((u32)(dma))
 396 #define VMXNET3_GET_ADDR_HI(dma)   ((u32)(((u64)(dma)) >> 32))
 397
 398 #define VMXNET3_VERSION_GE_2(adapter) \
 399         (adapter->version >= VMXNET3_REV_2 + 1)
 400 #define VMXNET3_VERSION_GE_3(adapter) \
 401         (adapter->version >= VMXNET3_REV_3 + 1)
 402
 403 /* must be a multiple of VMXNET3_RING_SIZE_ALIGN */
 404 #define VMXNET3_DEF_TX_RING_SIZE    512
 405 #define VMXNET3_DEF_RX_RING_SIZE    256
 406 #define VMXNET3_DEF_RX_RING2_SIZE   128
 407
 408 #define VMXNET3_MAX_ETH_HDR_SIZE    22
 409 #define VMXNET3_MAX_SKB_BUF_SIZE    (3*1024)
 410
 411 int
 412 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter);
 413
 414 int
 415 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter);
 416
 417 void
 418 vmxnet3_force_close(struct vmxnet3_adapter *adapter);
 419
 420 void
 421 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter);
 422
 423 void
 424 vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter);
 425
 426 void
 427 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter);
 428
 429 int
 430 vmxnet3_set_features(struct net_device *netdev, netdev_features_t features);
 431
 432 int
 433 vmxnet3_create_queues(struct vmxnet3_adapter *adapter,
 434                       u32 tx_ring_size, u32 rx_ring_size, u32 rx_ring2_size,
 435                       u16 txdata_desc_size);
 436
 437 void vmxnet3_set_ethtool_ops(struct net_device *netdev);
 438
 439 struct rtnl_link_stats64 *
 440 vmxnet3_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats);
 441
 442 extern char vmxnet3_driver_name[];
 443 #endif