1 /* 2 * Linux driver for VMware's vmxnet3 ethernet NIC. 3 * 4 * Copyright (C) 2008-2009, 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: Shreyas Bhatewara <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/init.h> 41 #include <linux/timer.h> 42 #include <linux/skbuff.h> 43 #include <linux/interrupt.h> 44 #include <linux/workqueue.h> 45 #include <linux/uaccess.h> 46 #include <asm/dma.h> 47 #include <asm/page.h> 48 49 #include <linux/tcp.h> 50 #include <linux/udp.h> 51 #include <linux/ip.h> 52 #include <linux/ipv6.h> 53 #include <linux/in.h> 54 #include <linux/etherdevice.h> 55 #include <asm/checksum.h> 56 #include <linux/if_vlan.h> 57 #include <linux/if_arp.h> 58 #include <linux/inetdevice.h> 59 #include <linux/log2.h> 60 61 #include "vmxnet3_defs.h" 62 63 #ifdef DEBUG 64 # define VMXNET3_DRIVER_VERSION_REPORT VMXNET3_DRIVER_VERSION_STRING"-NAPI(debug)" 65 #else 66 # define VMXNET3_DRIVER_VERSION_REPORT VMXNET3_DRIVER_VERSION_STRING"-NAPI" 67 #endif 68 69 70 /* 71 * Version numbers 72 */ 73 #define VMXNET3_DRIVER_VERSION_STRING "1.1.29.0-k" 74 75 /* a 32-bit int, each byte encode a verion number in VMXNET3_DRIVER_VERSION */ 76 #define VMXNET3_DRIVER_VERSION_NUM 0x01011D00 77 78 #if defined(CONFIG_PCI_MSI) 79 /* RSS only makes sense if MSI-X is supported. */ 80 #define VMXNET3_RSS 81 #endif 82 83 /* 84 * Capabilities 85 */ 86 87 enum { 88 VMNET_CAP_SG = 0x0001, /* Can do scatter-gather transmits. */ 89 VMNET_CAP_IP4_CSUM = 0x0002, /* Can checksum only TCP/UDP over 90 * IPv4 */ 91 VMNET_CAP_HW_CSUM = 0x0004, /* Can checksum all packets. */ 92 VMNET_CAP_HIGH_DMA = 0x0008, /* Can DMA to high memory. */ 93 VMNET_CAP_TOE = 0x0010, /* Supports TCP/IP offload. */ 94 VMNET_CAP_TSO = 0x0020, /* Supports TCP Segmentation 95 * offload */ 96 VMNET_CAP_SW_TSO = 0x0040, /* Supports SW TCP Segmentation */ 97 VMNET_CAP_VMXNET_APROM = 0x0080, /* Vmxnet APROM support */ 98 VMNET_CAP_HW_TX_VLAN = 0x0100, /* Can we do VLAN tagging in HW */ 99 VMNET_CAP_HW_RX_VLAN = 0x0200, /* Can we do VLAN untagging in HW */ 100 VMNET_CAP_SW_VLAN = 0x0400, /* VLAN tagging/untagging in SW */ 101 VMNET_CAP_WAKE_PCKT_RCV = 0x0800, /* Can wake on network packet recv? */ 102 VMNET_CAP_ENABLE_INT_INLINE = 0x1000, /* Enable Interrupt Inline */ 103 VMNET_CAP_ENABLE_HEADER_COPY = 0x2000, /* copy header for vmkernel */ 104 VMNET_CAP_TX_CHAIN = 0x4000, /* Guest can use multiple tx entries 105 * for a pkt */ 106 VMNET_CAP_RX_CHAIN = 0x8000, /* pkt can span multiple rx entries */ 107 VMNET_CAP_LPD = 0x10000, /* large pkt delivery */ 108 VMNET_CAP_BPF = 0x20000, /* BPF Support in VMXNET Virtual HW*/ 109 VMNET_CAP_SG_SPAN_PAGES = 0x40000, /* Scatter-gather can span multiple*/ 110 /* pages transmits */ 111 VMNET_CAP_IP6_CSUM = 0x80000, /* Can do IPv6 csum offload. */ 112 VMNET_CAP_TSO6 = 0x100000, /* TSO seg. offload for IPv6 pkts. */ 113 VMNET_CAP_TSO256k = 0x200000, /* Can do TSO seg offload for */ 114 /* pkts up to 256kB. */ 115 VMNET_CAP_UPT = 0x400000 /* Support UPT */ 116 }; 117 118 /* 119 * PCI vendor and device IDs. 120 */ 121 #define PCI_VENDOR_ID_VMWARE 0x15AD 122 #define PCI_DEVICE_ID_VMWARE_VMXNET3 0x07B0 123 #define MAX_ETHERNET_CARDS 10 124 #define MAX_PCI_PASSTHRU_DEVICE 6 125 126 struct vmxnet3_cmd_ring { 127 union Vmxnet3_GenericDesc *base; 128 u32 size; 129 u32 next2fill; 130 u32 next2comp; 131 u8 gen; 132 dma_addr_t basePA; 133 }; 134 135 static inline void 136 vmxnet3_cmd_ring_adv_next2fill(struct vmxnet3_cmd_ring *ring) 137 { 138 ring->next2fill++; 139 if (unlikely(ring->next2fill == ring->size)) { 140 ring->next2fill = 0; 141 VMXNET3_FLIP_RING_GEN(ring->gen); 142 } 143 } 144 145 static inline void 146 vmxnet3_cmd_ring_adv_next2comp(struct vmxnet3_cmd_ring *ring) 147 { 148 VMXNET3_INC_RING_IDX_ONLY(ring->next2comp, ring->size); 149 } 150 151 static inline int 152 vmxnet3_cmd_ring_desc_avail(struct vmxnet3_cmd_ring *ring) 153 { 154 return (ring->next2comp > ring->next2fill ? 0 : ring->size) + 155 ring->next2comp - ring->next2fill - 1; 156 } 157 158 struct vmxnet3_comp_ring { 159 union Vmxnet3_GenericDesc *base; 160 u32 size; 161 u32 next2proc; 162 u8 gen; 163 u8 intr_idx; 164 dma_addr_t basePA; 165 }; 166 167 static inline void 168 vmxnet3_comp_ring_adv_next2proc(struct vmxnet3_comp_ring *ring) 169 { 170 ring->next2proc++; 171 if (unlikely(ring->next2proc == ring->size)) { 172 ring->next2proc = 0; 173 VMXNET3_FLIP_RING_GEN(ring->gen); 174 } 175 } 176 177 struct vmxnet3_tx_data_ring { 178 struct Vmxnet3_TxDataDesc *base; 179 u32 size; 180 dma_addr_t basePA; 181 }; 182 183 enum vmxnet3_buf_map_type { 184 VMXNET3_MAP_INVALID = 0, 185 VMXNET3_MAP_NONE, 186 VMXNET3_MAP_SINGLE, 187 VMXNET3_MAP_PAGE, 188 }; 189 190 struct vmxnet3_tx_buf_info { 191 u32 map_type; 192 u16 len; 193 u16 sop_idx; 194 dma_addr_t dma_addr; 195 struct sk_buff *skb; 196 }; 197 198 struct vmxnet3_tq_driver_stats { 199 u64 drop_total; /* # of pkts dropped by the driver, the 200 * counters below track droppings due to 201 * different reasons 202 */ 203 u64 drop_too_many_frags; 204 u64 drop_oversized_hdr; 205 u64 drop_hdr_inspect_err; 206 u64 drop_tso; 207 208 u64 tx_ring_full; 209 u64 linearized; /* # of pkts linearized */ 210 u64 copy_skb_header; /* # of times we have to copy skb header */ 211 u64 oversized_hdr; 212 }; 213 214 struct vmxnet3_tx_ctx { 215 bool ipv4; 216 u16 mss; 217 u32 eth_ip_hdr_size; /* only valid for pkts requesting tso or csum 218 * offloading 219 */ 220 u32 l4_hdr_size; /* only valid if mss != 0 */ 221 u32 copy_size; /* # of bytes copied into the data ring */ 222 union Vmxnet3_GenericDesc *sop_txd; 223 union Vmxnet3_GenericDesc *eop_txd; 224 }; 225 226 struct vmxnet3_tx_queue { 227 char name[IFNAMSIZ+8]; /* To identify interrupt */ 228 struct vmxnet3_adapter *adapter; 229 spinlock_t tx_lock; 230 struct vmxnet3_cmd_ring tx_ring; 231 struct vmxnet3_tx_buf_info *buf_info; 232 struct vmxnet3_tx_data_ring data_ring; 233 struct vmxnet3_comp_ring comp_ring; 234 struct Vmxnet3_TxQueueCtrl *shared; 235 struct vmxnet3_tq_driver_stats stats; 236 bool stopped; 237 int num_stop; /* # of times the queue is 238 * stopped */ 239 int qid; 240 } __attribute__((__aligned__(SMP_CACHE_BYTES))); 241 242 enum vmxnet3_rx_buf_type { 243 VMXNET3_RX_BUF_NONE = 0, 244 VMXNET3_RX_BUF_SKB = 1, 245 VMXNET3_RX_BUF_PAGE = 2 246 }; 247 248 struct vmxnet3_rx_buf_info { 249 enum vmxnet3_rx_buf_type buf_type; 250 u16 len; 251 union { 252 struct sk_buff *skb; 253 struct page *page; 254 }; 255 dma_addr_t dma_addr; 256 }; 257 258 struct vmxnet3_rx_ctx { 259 struct sk_buff *skb; 260 u32 sop_idx; 261 }; 262 263 struct vmxnet3_rq_driver_stats { 264 u64 drop_total; 265 u64 drop_err; 266 u64 drop_fcs; 267 u64 rx_buf_alloc_failure; 268 }; 269 270 struct vmxnet3_rx_queue { 271 char name[IFNAMSIZ + 8]; /* To identify interrupt */ 272 struct vmxnet3_adapter *adapter; 273 struct napi_struct napi; 274 struct vmxnet3_cmd_ring rx_ring[2]; 275 struct vmxnet3_comp_ring comp_ring; 276 struct vmxnet3_rx_ctx rx_ctx; 277 u32 qid; /* rqID in RCD for buffer from 1st ring */ 278 u32 qid2; /* rqID in RCD for buffer from 2nd ring */ 279 u32 uncommitted[2]; /* # of buffers allocated since last RXPROD 280 * update */ 281 struct vmxnet3_rx_buf_info *buf_info[2]; 282 struct Vmxnet3_RxQueueCtrl *shared; 283 struct vmxnet3_rq_driver_stats stats; 284 } __attribute__((__aligned__(SMP_CACHE_BYTES))); 285 286 #define VMXNET3_DEVICE_MAX_TX_QUEUES 8 287 #define VMXNET3_DEVICE_MAX_RX_QUEUES 8 /* Keep this value as a power of 2 */ 288 289 /* Should be less than UPT1_RSS_MAX_IND_TABLE_SIZE */ 290 #define VMXNET3_RSS_IND_TABLE_SIZE (VMXNET3_DEVICE_MAX_RX_QUEUES * 4) 291 292 #define VMXNET3_LINUX_MAX_MSIX_VECT (VMXNET3_DEVICE_MAX_TX_QUEUES + \ 293 VMXNET3_DEVICE_MAX_RX_QUEUES + 1) 294 #define VMXNET3_LINUX_MIN_MSIX_VECT 2 /* 1 for tx-rx pair and 1 for event */ 295 296 297 struct vmxnet3_intr { 298 enum vmxnet3_intr_mask_mode mask_mode; 299 enum vmxnet3_intr_type type; /* MSI-X, MSI, or INTx? */ 300 u8 num_intrs; /* # of intr vectors */ 301 u8 event_intr_idx; /* idx of the intr vector for event */ 302 u8 mod_levels[VMXNET3_LINUX_MAX_MSIX_VECT]; /* moderation level */ 303 char event_msi_vector_name[IFNAMSIZ+11]; 304 #ifdef CONFIG_PCI_MSI 305 struct msix_entry msix_entries[VMXNET3_LINUX_MAX_MSIX_VECT]; 306 #endif 307 }; 308 309 /* Interrupt sharing schemes, share_intr */ 310 #define VMXNET3_INTR_BUDDYSHARE 0 /* Corresponding tx,rx queues share irq */ 311 #define VMXNET3_INTR_TXSHARE 1 /* All tx queues share one irq */ 312 #define VMXNET3_INTR_DONTSHARE 2 /* each queue has its own irq */ 313 314 315 #define VMXNET3_STATE_BIT_RESETTING 0 316 #define VMXNET3_STATE_BIT_QUIESCED 1 317 struct vmxnet3_adapter { 318 struct vmxnet3_tx_queue tx_queue[VMXNET3_DEVICE_MAX_TX_QUEUES]; 319 struct vmxnet3_rx_queue rx_queue[VMXNET3_DEVICE_MAX_RX_QUEUES]; 320 unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)]; 321 struct vmxnet3_intr intr; 322 spinlock_t cmd_lock; 323 struct Vmxnet3_DriverShared *shared; 324 struct Vmxnet3_PMConf *pm_conf; 325 struct Vmxnet3_TxQueueDesc *tqd_start; /* all tx queue desc */ 326 struct Vmxnet3_RxQueueDesc *rqd_start; /* all rx queue desc */ 327 struct net_device *netdev; 328 struct pci_dev *pdev; 329 330 u8 __iomem *hw_addr0; /* for BAR 0 */ 331 u8 __iomem *hw_addr1; /* for BAR 1 */ 332 333 #ifdef VMXNET3_RSS 334 struct UPT1_RSSConf *rss_conf; 335 bool rss; 336 #endif 337 u32 num_rx_queues; 338 u32 num_tx_queues; 339 340 /* rx buffer related */ 341 unsigned skb_buf_size; 342 int rx_buf_per_pkt; /* only apply to the 1st ring */ 343 dma_addr_t shared_pa; 344 dma_addr_t queue_desc_pa; 345 346 /* Wake-on-LAN */ 347 u32 wol; 348 349 /* Link speed */ 350 u32 link_speed; /* in mbps */ 351 352 u64 tx_timeout_count; 353 struct work_struct work; 354 355 unsigned long state; /* VMXNET3_STATE_BIT_xxx */ 356 357 int dev_number; 358 int share_intr; 359 }; 360 361 #define VMXNET3_WRITE_BAR0_REG(adapter, reg, val) \ 362 writel((val), (adapter)->hw_addr0 + (reg)) 363 #define VMXNET3_READ_BAR0_REG(adapter, reg) \ 364 readl((adapter)->hw_addr0 + (reg)) 365 366 #define VMXNET3_WRITE_BAR1_REG(adapter, reg, val) \ 367 writel((val), (adapter)->hw_addr1 + (reg)) 368 #define VMXNET3_READ_BAR1_REG(adapter, reg) \ 369 readl((adapter)->hw_addr1 + (reg)) 370 371 #define VMXNET3_WAKE_QUEUE_THRESHOLD(tq) (5) 372 #define VMXNET3_RX_ALLOC_THRESHOLD(rq, ring_idx, adapter) \ 373 ((rq)->rx_ring[ring_idx].size >> 3) 374 375 #define VMXNET3_GET_ADDR_LO(dma) ((u32)(dma)) 376 #define VMXNET3_GET_ADDR_HI(dma) ((u32)(((u64)(dma)) >> 32)) 377 378 /* must be a multiple of VMXNET3_RING_SIZE_ALIGN */ 379 #define VMXNET3_DEF_TX_RING_SIZE 512 380 #define VMXNET3_DEF_RX_RING_SIZE 256 381 382 #define VMXNET3_MAX_ETH_HDR_SIZE 22 383 #define VMXNET3_MAX_SKB_BUF_SIZE (3*1024) 384 385 int 386 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter); 387 388 int 389 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter); 390 391 void 392 vmxnet3_force_close(struct vmxnet3_adapter *adapter); 393 394 void 395 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter); 396 397 void 398 vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter); 399 400 void 401 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter); 402 403 int 404 vmxnet3_set_features(struct net_device *netdev, netdev_features_t features); 405 406 int 407 vmxnet3_create_queues(struct vmxnet3_adapter *adapter, 408 u32 tx_ring_size, u32 rx_ring_size, u32 rx_ring2_size); 409 410 extern void vmxnet3_set_ethtool_ops(struct net_device *netdev); 411 412 extern struct rtnl_link_stats64 * 413 vmxnet3_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats); 414 415 extern char vmxnet3_driver_name[]; 416 #endif 417