1 /*- 2 * Copyright (c) 2014-2017, Matthew Macy (mmacy@mattmacy.io) 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 11 * 2. Neither the name of Matthew Macy nor the names of its 12 * contributors may be used to endorse or promote products derived from 13 * this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 #ifndef __IFLIB_H_ 30 #define __IFLIB_H_ 31 32 #include <sys/kobj.h> 33 #include <sys/bus.h> 34 #include <sys/cpuset.h> 35 #include <machine/bus.h> 36 #include <sys/nv.h> 37 #include <sys/gtaskqueue.h> 38 39 struct if_clone; 40 41 /* 42 * The value type for indexing, limits max descriptors 43 * to 65535 can be conditionally redefined to uint32_t 44 * in the future if the need arises. 45 */ 46 typedef uint16_t qidx_t; 47 #define QIDX_INVALID 0xFFFF 48 49 struct iflib_ctx; 50 typedef struct iflib_ctx *if_ctx_t; 51 struct if_shared_ctx; 52 typedef const struct if_shared_ctx *if_shared_ctx_t; 53 struct if_int_delay_info; 54 typedef struct if_int_delay_info *if_int_delay_info_t; 55 struct if_pseudo; 56 typedef struct if_pseudo *if_pseudo_t; 57 58 /* 59 * File organization: 60 * - public structures 61 * - iflib accessors 62 * - iflib utility functions 63 * - iflib core functions 64 */ 65 66 typedef struct if_rxd_frag { 67 uint8_t irf_flid; 68 qidx_t irf_idx; 69 uint16_t irf_len; 70 } *if_rxd_frag_t; 71 72 /* bnxt supports 64 with hardware LRO enabled */ 73 #define IFLIB_MAX_RX_SEGS 64 74 75 typedef struct if_rxd_info { 76 /* set by iflib */ 77 uint16_t iri_qsidx; /* qset index */ 78 uint16_t iri_vtag; /* vlan tag - if flag set */ 79 /* XXX redundant with the new irf_len field */ 80 uint16_t iri_len; /* packet length */ 81 qidx_t iri_cidx; /* consumer index of cq */ 82 if_t iri_ifp; /* driver may have >1 iface per softc */ 83 84 /* updated by driver */ 85 if_rxd_frag_t iri_frags; 86 uint32_t iri_flowid; /* RSS hash for packet */ 87 uint32_t iri_csum_flags; /* m_pkthdr csum flags */ 88 89 uint32_t iri_csum_data; /* m_pkthdr csum data */ 90 uint8_t iri_flags; /* mbuf flags for packet */ 91 uint8_t iri_nfrags; /* number of fragments in packet */ 92 uint8_t iri_rsstype; /* RSS hash type */ 93 uint8_t iri_pad; /* any padding in the received data */ 94 } *if_rxd_info_t; 95 96 typedef struct if_rxd_update { 97 uint64_t *iru_paddrs; 98 qidx_t *iru_idxs; 99 qidx_t iru_pidx; 100 uint16_t iru_qsidx; 101 uint16_t iru_count; 102 uint16_t iru_buf_size; 103 uint8_t iru_flidx; 104 } *if_rxd_update_t; 105 106 #define IPI_TX_INTR 0x1 /* send an interrupt when this packet is sent */ 107 #define IPI_TX_IPV4 0x2 /* ethertype IPv4 */ 108 #define IPI_TX_IPV6 0x4 /* ethertype IPv6 */ 109 110 typedef struct if_pkt_info { 111 bus_dma_segment_t *ipi_segs; /* physical addresses */ 112 uint32_t ipi_len; /* packet length */ 113 uint16_t ipi_qsidx; /* queue set index */ 114 qidx_t ipi_nsegs; /* number of segments */ 115 116 qidx_t ipi_ndescs; /* number of descriptors used by encap */ 117 uint16_t ipi_flags; /* iflib per-packet flags */ 118 qidx_t ipi_pidx; /* start pidx for encap */ 119 qidx_t ipi_new_pidx; /* next available pidx post-encap */ 120 /* offload handling */ 121 uint8_t ipi_ehdrlen; /* ether header length */ 122 uint8_t ipi_ip_hlen; /* ip header length */ 123 uint8_t ipi_tcp_hlen; /* tcp header length */ 124 uint8_t ipi_ipproto; /* ip protocol */ 125 126 uint32_t ipi_csum_flags; /* packet checksum flags */ 127 uint16_t ipi_tso_segsz; /* tso segment size */ 128 uint16_t ipi_vtag; /* VLAN tag */ 129 uint16_t ipi_etype; /* ether header type */ 130 uint8_t ipi_tcp_hflags; /* tcp header flags */ 131 uint8_t ipi_mflags; /* packet mbuf flags */ 132 133 uint32_t ipi_tcp_seq; /* tcp seqno */ 134 uint8_t ipi_ip_tos; /* IP ToS field data */ 135 uint8_t __spare0__; 136 uint16_t __spare1__; 137 } *if_pkt_info_t; 138 139 typedef struct if_irq { 140 struct resource *ii_res; 141 int __spare0__; 142 void *ii_tag; 143 } *if_irq_t; 144 145 struct if_int_delay_info { 146 if_ctx_t iidi_ctx; /* Back-pointer to the iflib ctx (softc) */ 147 int iidi_offset; /* Register offset to read/write */ 148 int iidi_value; /* Current value in usecs */ 149 struct sysctl_oid *iidi_oidp; 150 struct sysctl_req *iidi_req; 151 }; 152 153 typedef enum { 154 IFLIB_INTR_LEGACY, 155 IFLIB_INTR_MSI, 156 IFLIB_INTR_MSIX 157 } iflib_intr_mode_t; 158 159 /* 160 * This really belongs in pciio.h or some place more general 161 * but this is the only consumer for now. 162 */ 163 typedef struct pci_vendor_info { 164 uint32_t pvi_vendor_id; 165 uint32_t pvi_device_id; 166 uint32_t pvi_subvendor_id; 167 uint32_t pvi_subdevice_id; 168 uint32_t pvi_rev_id; 169 uint32_t pvi_class_mask; 170 const char *pvi_name; 171 } pci_vendor_info_t; 172 #define PVID(vendor, devid, name) {vendor, devid, 0, 0, 0, 0, name} 173 #define PVID_OEM(vendor, devid, svid, sdevid, revid, name) {vendor, devid, svid, sdevid, revid, 0, name} 174 #define PVID_END {0, 0, 0, 0, 0, 0, NULL} 175 176 /* No drivers in tree currently match on anything except vendor:device. */ 177 #define IFLIB_PNP_DESCR "U32:vendor;U32:device;U32:#;U32:#;" \ 178 "U32:#;U32:#;D:#" 179 #define IFLIB_PNP_INFO(b, u, t) \ 180 MODULE_PNP_INFO(IFLIB_PNP_DESCR, b, u, t, nitems(t) - 1) 181 182 typedef struct if_txrx { 183 int (*ift_txd_encap) (void *, if_pkt_info_t); 184 void (*ift_txd_flush) (void *, uint16_t, qidx_t pidx); 185 int (*ift_txd_credits_update) (void *, uint16_t qsidx, bool clear); 186 187 int (*ift_rxd_available) (void *, uint16_t qsidx, qidx_t pidx, qidx_t budget); 188 int (*ift_rxd_pkt_get) (void *, if_rxd_info_t ri); 189 void (*ift_rxd_refill) (void * , if_rxd_update_t iru); 190 void (*ift_rxd_flush) (void *, uint16_t qsidx, uint8_t flidx, qidx_t pidx); 191 int (*ift_legacy_intr) (void *); 192 qidx_t (*ift_txq_select) (void *, struct mbuf *); 193 qidx_t (*ift_txq_select_v2) (void *, struct mbuf *, if_pkt_info_t); 194 } *if_txrx_t; 195 196 typedef struct if_softc_ctx { 197 int isc_vectors; 198 int isc_nrxqsets; 199 int isc_ntxqsets; 200 uint16_t __spare0__; 201 uint32_t __spare1__; 202 int isc_msix_bar; /* can be model specific - initialize in attach_pre */ 203 int isc_tx_nsegments; /* can be model specific - initialize in attach_pre */ 204 int isc_ntxd[8]; 205 int isc_nrxd[8]; 206 207 uint32_t isc_txqsizes[8]; 208 uint32_t isc_rxqsizes[8]; 209 /* is there such thing as a descriptor that is more than 248 bytes ? */ 210 uint8_t isc_txd_size[8]; 211 uint8_t isc_rxd_size[8]; 212 213 int isc_tx_tso_segments_max; 214 int isc_tx_tso_size_max; 215 int isc_tx_tso_segsize_max; 216 int isc_tx_csum_flags; 217 int isc_capabilities; 218 int isc_capenable; 219 int isc_rss_table_size; 220 int isc_rss_table_mask; 221 int isc_nrxqsets_max; 222 int isc_ntxqsets_max; 223 uint32_t __spare2__; 224 225 iflib_intr_mode_t isc_intr; 226 uint16_t isc_rxd_buf_size[8]; /* set at init time by driver, 0 227 means use iflib-calculated size 228 based on isc_max_frame_size */ 229 uint16_t isc_max_frame_size; /* set at init time by driver */ 230 uint16_t isc_min_frame_size; /* set at init time by driver, only used if 231 IFLIB_NEED_ETHER_PAD is set. */ 232 uint32_t isc_pause_frames; /* set by driver for iflib_timer to detect */ 233 uint32_t __spare3__; 234 uint32_t __spare4__; 235 uint32_t __spare5__; 236 uint32_t __spare6__; 237 uint32_t __spare7__; 238 uint32_t __spare8__; 239 caddr_t __spare9__; 240 int isc_disable_msix; 241 if_txrx_t isc_txrx; 242 struct ifmedia *isc_media; 243 bus_size_t isc_dma_width; /* device dma width in bits, 0 means 244 use BUS_SPACE_MAXADDR instead */ 245 } *if_softc_ctx_t; 246 247 /* 248 * Initialization values for device 249 */ 250 struct if_shared_ctx { 251 unsigned isc_magic; 252 driver_t *isc_driver; 253 bus_size_t isc_q_align; 254 bus_size_t isc_tx_maxsize; 255 bus_size_t isc_tx_maxsegsize; 256 bus_size_t isc_tso_maxsize; 257 bus_size_t isc_tso_maxsegsize; 258 bus_size_t isc_rx_maxsize; 259 bus_size_t isc_rx_maxsegsize; 260 int isc_rx_nsegments; 261 int isc_admin_intrcnt; /* # of admin/link interrupts */ 262 263 /* fields necessary for probe */ 264 const pci_vendor_info_t *isc_vendor_info; 265 const char *isc_driver_version; 266 /* optional function to transform the read values to match the table*/ 267 void (*isc_parse_devinfo) (uint16_t *device_id, uint16_t *subvendor_id, 268 uint16_t *subdevice_id, uint16_t *rev_id); 269 int isc_nrxd_min[8]; 270 int isc_nrxd_default[8]; 271 int isc_nrxd_max[8]; 272 int isc_ntxd_min[8]; 273 int isc_ntxd_default[8]; 274 int isc_ntxd_max[8]; 275 276 /* actively used during operation */ 277 int isc_nfl __aligned(CACHE_LINE_SIZE); 278 int isc_ntxqs; /* # of tx queues per tx qset - usually 1 */ 279 int isc_nrxqs; /* # of rx queues per rx qset - intel 1, chelsio 2, broadcom 3 */ 280 int __spare0__; 281 int isc_tx_reclaim_thresh; 282 int isc_flags; 283 const char *isc_name; 284 }; 285 286 typedef struct iflib_dma_info { 287 bus_addr_t idi_paddr; 288 caddr_t idi_vaddr; 289 bus_dma_tag_t idi_tag; 290 bus_dmamap_t idi_map; 291 uint32_t idi_size; 292 } *iflib_dma_info_t; 293 294 #define IFLIB_MAGIC 0xCAFEF00D 295 296 typedef enum { 297 /* Interrupt or softirq handles only receive */ 298 IFLIB_INTR_RX, 299 300 /* Interrupt or softirq handles only transmit */ 301 IFLIB_INTR_TX, 302 303 /* 304 * Interrupt will check for both pending receive 305 * and available tx credits and dispatch a task 306 * for one or both depending on the disposition 307 * of the respective queues. 308 */ 309 IFLIB_INTR_RXTX, 310 311 /* 312 * Other interrupt - typically link status and 313 * or error conditions. 314 */ 315 IFLIB_INTR_ADMIN, 316 317 /* Softirq (task) for iov handling */ 318 IFLIB_INTR_IOV, 319 } iflib_intr_type_t; 320 321 /* 322 * Interface has a separate completion queue for RX 323 */ 324 #define IFLIB_HAS_RXCQ 0x01 325 /* 326 * Driver has already allocated vectors 327 */ 328 #define IFLIB_SKIP_MSIX 0x02 329 /* 330 * Interface is a virtual function 331 */ 332 #define IFLIB_IS_VF 0x04 333 /* 334 * Interface has a separate completion queue for TX 335 */ 336 #define IFLIB_HAS_TXCQ 0x08 337 /* 338 * Interface does checksum in place 339 */ 340 #define IFLIB_NEED_SCRATCH 0x10 341 /* 342 * Interface doesn't expect in_pseudo for th_sum 343 */ 344 #define IFLIB_TSO_INIT_IP 0x20 345 /* 346 * Interface doesn't align IP header 347 */ 348 #define IFLIB_DO_RX_FIXUP 0x40 349 /* 350 * Driver needs csum zeroed for offloading 351 */ 352 #define IFLIB_NEED_ZERO_CSUM 0x80 353 /* 354 * Driver needs frames padded to some minimum length 355 */ 356 #define IFLIB_NEED_ETHER_PAD 0x100 357 /* 358 * Packets can be freed immediately after encap 359 */ 360 #define IFLIB_TXD_ENCAP_PIO 0x00200 361 /* 362 * Use RX completion handler 363 */ 364 #define IFLIB_RX_COMPLETION 0x00400 365 /* 366 * Skip refilling cluster free lists 367 */ 368 #define IFLIB_SKIP_CLREFILL 0x00800 369 /* 370 * Don't reset on hang 371 */ 372 #define IFLIB_NO_HANG_RESET 0x01000 373 /* 374 * Don't need/want most of the niceties of 375 * queue management 376 */ 377 #define IFLIB_PSEUDO 0x02000 378 /* 379 * No DMA support needed / wanted 380 */ 381 #define IFLIB_VIRTUAL 0x04000 382 /* 383 * autogenerate a MAC address 384 */ 385 #define IFLIB_GEN_MAC 0x08000 386 /* 387 * Interface needs admin task to ignore interface up/down status 388 */ 389 #define IFLIB_ADMIN_ALWAYS_RUN 0x10000 390 /* 391 * Driver will pass the media 392 */ 393 #define IFLIB_DRIVER_MEDIA 0x20000 394 /* 395 * When using a single hardware interrupt for the interface, only process RX 396 * interrupts instead of doing combined RX/TX processing. 397 */ 398 #define IFLIB_SINGLE_IRQ_RX_ONLY 0x40000 399 /* 400 * Don't need/want most of the niceties of 401 * emulating ethernet 402 */ 403 #define IFLIB_PSEUDO_ETHER 0x80000 404 /* 405 * Interface has an admin completion queue 406 */ 407 #define IFLIB_HAS_ADMINCQ 0x100000 408 /* 409 * Interface needs to preserve TX ring indices across restarts. 410 */ 411 #define IFLIB_PRESERVE_TX_INDICES 0x200000 412 413 /* The following IFLIB_FEATURE_* defines are for driver modules to determine 414 * what features this version of iflib supports. They shall be defined to the 415 * first __FreeBSD_version that introduced the feature. 416 */ 417 /* 418 * Driver can set its own TX queue selection function 419 * as ift_txq_select in struct if_txrx 420 */ 421 #define IFLIB_FEATURE_QUEUE_SELECT 1400050 422 /* 423 * Driver can set its own TX queue selection function 424 * as ift_txq_select_v2 in struct if_txrx. This includes 425 * having iflib send L3+ extra header information to the 426 * function. 427 */ 428 #define IFLIB_FEATURE_QUEUE_SELECT_V2 1400073 429 430 /* 431 * These enum values are used in iflib_needs_restart to indicate to iflib 432 * functions whether or not the interface needs restarting when certain events 433 * happen. 434 */ 435 enum iflib_restart_event { 436 IFLIB_RESTART_VLAN_CONFIG, 437 }; 438 439 /* 440 * field accessors 441 */ 442 void *iflib_get_softc(if_ctx_t ctx); 443 444 device_t iflib_get_dev(if_ctx_t ctx); 445 446 if_t iflib_get_ifp(if_ctx_t ctx); 447 448 struct ifmedia *iflib_get_media(if_ctx_t ctx); 449 450 if_softc_ctx_t iflib_get_softc_ctx(if_ctx_t ctx); 451 if_shared_ctx_t iflib_get_sctx(if_ctx_t ctx); 452 453 void iflib_set_mac(if_ctx_t ctx, uint8_t mac[ETHER_ADDR_LEN]); 454 void iflib_request_reset(if_ctx_t ctx); 455 uint8_t iflib_in_detach(if_ctx_t ctx); 456 457 uint32_t iflib_get_rx_mbuf_sz(if_ctx_t ctx); 458 459 /* 460 * If the driver can plug cleanly in to newbus use these 461 */ 462 int iflib_device_probe(device_t); 463 int iflib_device_attach(device_t); 464 int iflib_device_detach(device_t); 465 int iflib_device_suspend(device_t); 466 int iflib_device_resume(device_t); 467 int iflib_device_shutdown(device_t); 468 469 /* 470 * Use this instead of iflib_device_probe if the driver should report 471 * BUS_PROBE_VENDOR instead of BUS_PROBE_DEFAULT. (For example, an out-of-tree 472 * driver based on iflib). 473 */ 474 int iflib_device_probe_vendor(device_t); 475 476 int iflib_device_iov_init(device_t, uint16_t, const nvlist_t *); 477 void iflib_device_iov_uninit(device_t); 478 int iflib_device_iov_add_vf(device_t, uint16_t, const nvlist_t *); 479 480 /* 481 * If the driver can't plug cleanly in to newbus 482 * use these 483 */ 484 int iflib_device_register(device_t dev, void *softc, if_shared_ctx_t sctx, if_ctx_t *ctxp); 485 int iflib_device_deregister(if_ctx_t); 486 487 int iflib_irq_alloc(if_ctx_t, if_irq_t, int, driver_filter_t, void *filter_arg, driver_intr_t, void *arg, const char *name); 488 int iflib_irq_alloc_generic(if_ctx_t ctx, if_irq_t irq, int rid, 489 iflib_intr_type_t type, driver_filter_t *filter, 490 void *filter_arg, int qid, const char *name); 491 void iflib_softirq_alloc_generic(if_ctx_t ctx, if_irq_t irq, iflib_intr_type_t type, void *arg, int qid, const char *name); 492 493 void iflib_irq_free(if_ctx_t ctx, if_irq_t irq); 494 495 void iflib_io_tqg_attach(struct grouptask *gt, void *uniq, int cpu, 496 const char *name); 497 498 void iflib_config_gtask_init(void *ctx, struct grouptask *gtask, 499 gtask_fn_t *fn, const char *name); 500 void iflib_config_gtask_deinit(struct grouptask *gtask); 501 502 void iflib_tx_intr_deferred(if_ctx_t ctx, int txqid); 503 void iflib_rx_intr_deferred(if_ctx_t ctx, int rxqid); 504 void iflib_admin_intr_deferred(if_ctx_t ctx); 505 void iflib_iov_intr_deferred(if_ctx_t ctx); 506 507 void iflib_link_state_change(if_ctx_t ctx, int linkstate, uint64_t baudrate); 508 509 int iflib_dma_alloc(if_ctx_t ctx, int size, iflib_dma_info_t dma, int mapflags); 510 int iflib_dma_alloc_align(if_ctx_t ctx, int size, int align, iflib_dma_info_t dma, int mapflags); 511 void iflib_dma_free(iflib_dma_info_t dma); 512 int iflib_dma_alloc_multi(if_ctx_t ctx, int *sizes, iflib_dma_info_t *dmalist, int mapflags, int count); 513 514 void iflib_dma_free_multi(iflib_dma_info_t *dmalist, int count); 515 516 struct sx *iflib_ctx_lock_get(if_ctx_t); 517 518 void iflib_led_create(if_ctx_t ctx); 519 520 void iflib_add_int_delay_sysctl(if_ctx_t, const char *, const char *, 521 if_int_delay_info_t, int, int); 522 523 /* 524 * Pseudo device support 525 */ 526 if_pseudo_t iflib_clone_register(if_shared_ctx_t); 527 void iflib_clone_deregister(if_pseudo_t); 528 529 #endif /* __IFLIB_H_ */ 530