1 /* 2 * Linux driver for VMware's vmxnet3 ethernet NIC. 3 * 4 * Copyright (C) 2008-2020, 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 "1.5.0.0-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 0x01050000 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_4 3 /* Vmxnet3 Rev. 4 */ 85 #define VMXNET3_REV_3 2 /* Vmxnet3 Rev. 3 */ 86 #define VMXNET3_REV_2 1 /* Vmxnet3 Rev. 2 */ 87 #define VMXNET3_REV_1 0 /* Vmxnet3 Rev. 1 */ 88 89 /* 90 * Capabilities 91 */ 92 93 enum { 94 VMNET_CAP_SG = 0x0001, /* Can do scatter-gather transmits. */ 95 VMNET_CAP_IP4_CSUM = 0x0002, /* Can checksum only TCP/UDP over 96 * IPv4 */ 97 VMNET_CAP_HW_CSUM = 0x0004, /* Can checksum all packets. */ 98 VMNET_CAP_HIGH_DMA = 0x0008, /* Can DMA to high memory. */ 99 VMNET_CAP_TOE = 0x0010, /* Supports TCP/IP offload. */ 100 VMNET_CAP_TSO = 0x0020, /* Supports TCP Segmentation 101 * offload */ 102 VMNET_CAP_SW_TSO = 0x0040, /* Supports SW TCP Segmentation */ 103 VMNET_CAP_VMXNET_APROM = 0x0080, /* Vmxnet APROM support */ 104 VMNET_CAP_HW_TX_VLAN = 0x0100, /* Can we do VLAN tagging in HW */ 105 VMNET_CAP_HW_RX_VLAN = 0x0200, /* Can we do VLAN untagging in HW */ 106 VMNET_CAP_SW_VLAN = 0x0400, /* VLAN tagging/untagging in SW */ 107 VMNET_CAP_WAKE_PCKT_RCV = 0x0800, /* Can wake on network packet recv? */ 108 VMNET_CAP_ENABLE_INT_INLINE = 0x1000, /* Enable Interrupt Inline */ 109 VMNET_CAP_ENABLE_HEADER_COPY = 0x2000, /* copy header for vmkernel */ 110 VMNET_CAP_TX_CHAIN = 0x4000, /* Guest can use multiple tx entries 111 * for a pkt */ 112 VMNET_CAP_RX_CHAIN = 0x8000, /* pkt can span multiple rx entries */ 113 VMNET_CAP_LPD = 0x10000, /* large pkt delivery */ 114 VMNET_CAP_BPF = 0x20000, /* BPF Support in VMXNET Virtual HW*/ 115 VMNET_CAP_SG_SPAN_PAGES = 0x40000, /* Scatter-gather can span multiple*/ 116 /* pages transmits */ 117 VMNET_CAP_IP6_CSUM = 0x80000, /* Can do IPv6 csum offload. */ 118 VMNET_CAP_TSO6 = 0x100000, /* TSO seg. offload for IPv6 pkts. */ 119 VMNET_CAP_TSO256k = 0x200000, /* Can do TSO seg offload for */ 120 /* pkts up to 256kB. */ 121 VMNET_CAP_UPT = 0x400000 /* Support UPT */ 122 }; 123 124 /* 125 * Maximum devices supported. 126 */ 127 #define MAX_ETHERNET_CARDS 10 128 #define MAX_PCI_PASSTHRU_DEVICE 6 129 130 struct vmxnet3_cmd_ring { 131 union Vmxnet3_GenericDesc *base; 132 u32 size; 133 u32 next2fill; 134 u32 next2comp; 135 u8 gen; 136 dma_addr_t basePA; 137 }; 138 139 static inline void 140 vmxnet3_cmd_ring_adv_next2fill(struct vmxnet3_cmd_ring *ring) 141 { 142 ring->next2fill++; 143 if (unlikely(ring->next2fill == ring->size)) { 144 ring->next2fill = 0; 145 VMXNET3_FLIP_RING_GEN(ring->gen); 146 } 147 } 148 149 static inline void 150 vmxnet3_cmd_ring_adv_next2comp(struct vmxnet3_cmd_ring *ring) 151 { 152 VMXNET3_INC_RING_IDX_ONLY(ring->next2comp, ring->size); 153 } 154 155 static inline int 156 vmxnet3_cmd_ring_desc_avail(struct vmxnet3_cmd_ring *ring) 157 { 158 return (ring->next2comp > ring->next2fill ? 0 : ring->size) + 159 ring->next2comp - ring->next2fill - 1; 160 } 161 162 struct vmxnet3_comp_ring { 163 union Vmxnet3_GenericDesc *base; 164 u32 size; 165 u32 next2proc; 166 u8 gen; 167 u8 intr_idx; 168 dma_addr_t basePA; 169 }; 170 171 static inline void 172 vmxnet3_comp_ring_adv_next2proc(struct vmxnet3_comp_ring *ring) 173 { 174 ring->next2proc++; 175 if (unlikely(ring->next2proc == ring->size)) { 176 ring->next2proc = 0; 177 VMXNET3_FLIP_RING_GEN(ring->gen); 178 } 179 } 180 181 struct vmxnet3_tx_data_ring { 182 struct Vmxnet3_TxDataDesc *base; 183 u32 size; 184 dma_addr_t basePA; 185 }; 186 187 enum vmxnet3_buf_map_type { 188 VMXNET3_MAP_INVALID = 0, 189 VMXNET3_MAP_NONE, 190 VMXNET3_MAP_SINGLE, 191 VMXNET3_MAP_PAGE, 192 }; 193 194 struct vmxnet3_tx_buf_info { 195 u32 map_type; 196 u16 len; 197 u16 sop_idx; 198 dma_addr_t dma_addr; 199 struct sk_buff *skb; 200 }; 201 202 struct vmxnet3_tq_driver_stats { 203 u64 drop_total; /* # of pkts dropped by the driver, the 204 * counters below track droppings due to 205 * different reasons 206 */ 207 u64 drop_too_many_frags; 208 u64 drop_oversized_hdr; 209 u64 drop_hdr_inspect_err; 210 u64 drop_tso; 211 212 u64 tx_ring_full; 213 u64 linearized; /* # of pkts linearized */ 214 u64 copy_skb_header; /* # of times we have to copy skb header */ 215 u64 oversized_hdr; 216 }; 217 218 struct vmxnet3_tx_ctx { 219 bool ipv4; 220 bool ipv6; 221 u16 mss; 222 u32 l4_offset; /* only valid for pkts requesting tso or csum 223 * offloading. For encap offload, it refers to 224 * inner L4 offset i.e. it includes outer header 225 * encap header and inner eth and ip header size 226 */ 227 228 u32 l4_hdr_size; /* only valid if mss != 0 229 * Refers to inner L4 hdr size for encap 230 * offload 231 */ 232 u32 copy_size; /* # of bytes copied into the data ring */ 233 union Vmxnet3_GenericDesc *sop_txd; 234 union Vmxnet3_GenericDesc *eop_txd; 235 }; 236 237 struct vmxnet3_tx_queue { 238 char name[IFNAMSIZ+8]; /* To identify interrupt */ 239 struct vmxnet3_adapter *adapter; 240 spinlock_t tx_lock; 241 struct vmxnet3_cmd_ring tx_ring; 242 struct vmxnet3_tx_buf_info *buf_info; 243 dma_addr_t buf_info_pa; 244 struct vmxnet3_tx_data_ring data_ring; 245 struct vmxnet3_comp_ring comp_ring; 246 struct Vmxnet3_TxQueueCtrl *shared; 247 struct vmxnet3_tq_driver_stats stats; 248 bool stopped; 249 int num_stop; /* # of times the queue is 250 * stopped */ 251 int qid; 252 u16 txdata_desc_size; 253 } __attribute__((__aligned__(SMP_CACHE_BYTES))); 254 255 enum vmxnet3_rx_buf_type { 256 VMXNET3_RX_BUF_NONE = 0, 257 VMXNET3_RX_BUF_SKB = 1, 258 VMXNET3_RX_BUF_PAGE = 2 259 }; 260 261 struct vmxnet3_rx_buf_info { 262 enum vmxnet3_rx_buf_type buf_type; 263 u16 len; 264 union { 265 struct sk_buff *skb; 266 struct page *page; 267 }; 268 dma_addr_t dma_addr; 269 }; 270 271 struct vmxnet3_rx_ctx { 272 struct sk_buff *skb; 273 u32 sop_idx; 274 }; 275 276 struct vmxnet3_rq_driver_stats { 277 u64 drop_total; 278 u64 drop_err; 279 u64 drop_fcs; 280 u64 rx_buf_alloc_failure; 281 }; 282 283 struct vmxnet3_rx_data_ring { 284 Vmxnet3_RxDataDesc *base; 285 dma_addr_t basePA; 286 u16 desc_size; 287 }; 288 289 struct vmxnet3_rx_queue { 290 char name[IFNAMSIZ + 8]; /* To identify interrupt */ 291 struct vmxnet3_adapter *adapter; 292 struct napi_struct napi; 293 struct vmxnet3_cmd_ring rx_ring[2]; 294 struct vmxnet3_rx_data_ring data_ring; 295 struct vmxnet3_comp_ring comp_ring; 296 struct vmxnet3_rx_ctx rx_ctx; 297 u32 qid; /* rqID in RCD for buffer from 1st ring */ 298 u32 qid2; /* rqID in RCD for buffer from 2nd ring */ 299 u32 dataRingQid; /* rqID in RCD for buffer from data ring */ 300 struct vmxnet3_rx_buf_info *buf_info[2]; 301 dma_addr_t buf_info_pa; 302 struct Vmxnet3_RxQueueCtrl *shared; 303 struct vmxnet3_rq_driver_stats stats; 304 } __attribute__((__aligned__(SMP_CACHE_BYTES))); 305 306 #define VMXNET3_DEVICE_MAX_TX_QUEUES 8 307 #define VMXNET3_DEVICE_MAX_RX_QUEUES 8 /* Keep this value as a power of 2 */ 308 309 /* Should be less than UPT1_RSS_MAX_IND_TABLE_SIZE */ 310 #define VMXNET3_RSS_IND_TABLE_SIZE (VMXNET3_DEVICE_MAX_RX_QUEUES * 4) 311 312 #define VMXNET3_LINUX_MAX_MSIX_VECT (VMXNET3_DEVICE_MAX_TX_QUEUES + \ 313 VMXNET3_DEVICE_MAX_RX_QUEUES + 1) 314 #define VMXNET3_LINUX_MIN_MSIX_VECT 2 /* 1 for tx-rx pair and 1 for event */ 315 316 317 struct vmxnet3_intr { 318 enum vmxnet3_intr_mask_mode mask_mode; 319 enum vmxnet3_intr_type type; /* MSI-X, MSI, or INTx? */ 320 u8 num_intrs; /* # of intr vectors */ 321 u8 event_intr_idx; /* idx of the intr vector for event */ 322 u8 mod_levels[VMXNET3_LINUX_MAX_MSIX_VECT]; /* moderation level */ 323 char event_msi_vector_name[IFNAMSIZ+17]; 324 #ifdef CONFIG_PCI_MSI 325 struct msix_entry msix_entries[VMXNET3_LINUX_MAX_MSIX_VECT]; 326 #endif 327 }; 328 329 /* Interrupt sharing schemes, share_intr */ 330 #define VMXNET3_INTR_BUDDYSHARE 0 /* Corresponding tx,rx queues share irq */ 331 #define VMXNET3_INTR_TXSHARE 1 /* All tx queues share one irq */ 332 #define VMXNET3_INTR_DONTSHARE 2 /* each queue has its own irq */ 333 334 335 #define VMXNET3_STATE_BIT_RESETTING 0 336 #define VMXNET3_STATE_BIT_QUIESCED 1 337 struct vmxnet3_adapter { 338 struct vmxnet3_tx_queue tx_queue[VMXNET3_DEVICE_MAX_TX_QUEUES]; 339 struct vmxnet3_rx_queue rx_queue[VMXNET3_DEVICE_MAX_RX_QUEUES]; 340 unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)]; 341 struct vmxnet3_intr intr; 342 spinlock_t cmd_lock; 343 struct Vmxnet3_DriverShared *shared; 344 struct Vmxnet3_PMConf *pm_conf; 345 struct Vmxnet3_TxQueueDesc *tqd_start; /* all tx queue desc */ 346 struct Vmxnet3_RxQueueDesc *rqd_start; /* all rx queue desc */ 347 struct net_device *netdev; 348 struct pci_dev *pdev; 349 350 u8 __iomem *hw_addr0; /* for BAR 0 */ 351 u8 __iomem *hw_addr1; /* for BAR 1 */ 352 u8 version; 353 354 #ifdef VMXNET3_RSS 355 struct UPT1_RSSConf *rss_conf; 356 bool rss; 357 #endif 358 u32 num_rx_queues; 359 u32 num_tx_queues; 360 361 /* rx buffer related */ 362 unsigned skb_buf_size; 363 int rx_buf_per_pkt; /* only apply to the 1st ring */ 364 dma_addr_t shared_pa; 365 dma_addr_t queue_desc_pa; 366 dma_addr_t coal_conf_pa; 367 368 /* Wake-on-LAN */ 369 u32 wol; 370 371 /* Link speed */ 372 u32 link_speed; /* in mbps */ 373 374 u64 tx_timeout_count; 375 376 /* Ring sizes */ 377 u32 tx_ring_size; 378 u32 rx_ring_size; 379 u32 rx_ring2_size; 380 381 /* Size of buffer in the data ring */ 382 u16 txdata_desc_size; 383 u16 rxdata_desc_size; 384 385 bool rxdataring_enabled; 386 bool default_rss_fields; 387 enum Vmxnet3_RSSField rss_fields; 388 389 struct work_struct work; 390 391 unsigned long state; /* VMXNET3_STATE_BIT_xxx */ 392 393 int share_intr; 394 395 struct Vmxnet3_CoalesceScheme *coal_conf; 396 bool default_coal_mode; 397 398 dma_addr_t adapter_pa; 399 dma_addr_t pm_conf_pa; 400 dma_addr_t rss_conf_pa; 401 }; 402 403 #define VMXNET3_WRITE_BAR0_REG(adapter, reg, val) \ 404 writel((val), (adapter)->hw_addr0 + (reg)) 405 #define VMXNET3_READ_BAR0_REG(adapter, reg) \ 406 readl((adapter)->hw_addr0 + (reg)) 407 408 #define VMXNET3_WRITE_BAR1_REG(adapter, reg, val) \ 409 writel((val), (adapter)->hw_addr1 + (reg)) 410 #define VMXNET3_READ_BAR1_REG(adapter, reg) \ 411 readl((adapter)->hw_addr1 + (reg)) 412 413 #define VMXNET3_WAKE_QUEUE_THRESHOLD(tq) (5) 414 #define VMXNET3_RX_ALLOC_THRESHOLD(rq, ring_idx, adapter) \ 415 ((rq)->rx_ring[ring_idx].size >> 3) 416 417 #define VMXNET3_GET_ADDR_LO(dma) ((u32)(dma)) 418 #define VMXNET3_GET_ADDR_HI(dma) ((u32)(((u64)(dma)) >> 32)) 419 420 #define VMXNET3_VERSION_GE_2(adapter) \ 421 (adapter->version >= VMXNET3_REV_2 + 1) 422 #define VMXNET3_VERSION_GE_3(adapter) \ 423 (adapter->version >= VMXNET3_REV_3 + 1) 424 #define VMXNET3_VERSION_GE_4(adapter) \ 425 (adapter->version >= VMXNET3_REV_4 + 1) 426 427 /* must be a multiple of VMXNET3_RING_SIZE_ALIGN */ 428 #define VMXNET3_DEF_TX_RING_SIZE 512 429 #define VMXNET3_DEF_RX_RING_SIZE 1024 430 #define VMXNET3_DEF_RX_RING2_SIZE 256 431 432 #define VMXNET3_DEF_RXDATA_DESC_SIZE 128 433 434 #define VMXNET3_MAX_ETH_HDR_SIZE 22 435 #define VMXNET3_MAX_SKB_BUF_SIZE (3*1024) 436 437 #define VMXNET3_GET_RING_IDX(adapter, rqID) \ 438 ((rqID >= adapter->num_rx_queues && \ 439 rqID < 2 * adapter->num_rx_queues) ? 1 : 0) \ 440 441 #define VMXNET3_RX_DATA_RING(adapter, rqID) \ 442 (rqID >= 2 * adapter->num_rx_queues && \ 443 rqID < 3 * adapter->num_rx_queues) \ 444 445 #define VMXNET3_COAL_STATIC_DEFAULT_DEPTH 64 446 447 #define VMXNET3_COAL_RBC_RATE(usecs) (1000000 / usecs) 448 #define VMXNET3_COAL_RBC_USECS(rbc_rate) (1000000 / rbc_rate) 449 #define VMXNET3_RSS_FIELDS_DEFAULT (VMXNET3_RSS_FIELDS_TCPIP4 | \ 450 VMXNET3_RSS_FIELDS_TCPIP6) 451 452 int 453 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter); 454 455 int 456 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter); 457 458 void 459 vmxnet3_force_close(struct vmxnet3_adapter *adapter); 460 461 void 462 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter); 463 464 void 465 vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter); 466 467 void 468 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter); 469 470 netdev_features_t 471 vmxnet3_fix_features(struct net_device *netdev, netdev_features_t features); 472 473 netdev_features_t 474 vmxnet3_features_check(struct sk_buff *skb, 475 struct net_device *netdev, netdev_features_t features); 476 477 int 478 vmxnet3_set_features(struct net_device *netdev, netdev_features_t features); 479 480 int 481 vmxnet3_create_queues(struct vmxnet3_adapter *adapter, 482 u32 tx_ring_size, u32 rx_ring_size, u32 rx_ring2_size, 483 u16 txdata_desc_size, u16 rxdata_desc_size); 484 485 void vmxnet3_set_ethtool_ops(struct net_device *netdev); 486 487 void vmxnet3_get_stats64(struct net_device *dev, 488 struct rtnl_link_stats64 *stats); 489 490 extern char vmxnet3_driver_name[]; 491 #endif 492