iflib.h (15666B) - Raw
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 #ifndef __IFLIB_H_ 28 #define __IFLIB_H_ 29 30 #include <sys/kobj.h> 31 #include <sys/bus.h> 32 #include <sys/cpuset.h> 33 #include <machine/bus.h> 34 #include <sys/nv.h> 35 #include <sys/gtaskqueue.h> 36 37 /* 38 * The value type for indexing, limits max descriptors 39 * to 65535 can be conditionally redefined to uint32_t 40 * in the future if the need arises. 41 */ 42 typedef uint16_t qidx_t; 43 #define QIDX_INVALID 0xFFFF 44 45 struct iflib_ctx; 46 typedef struct iflib_ctx *if_ctx_t; 47 struct if_shared_ctx; 48 typedef const struct if_shared_ctx *if_shared_ctx_t; 49 struct if_int_delay_info; 50 typedef struct if_int_delay_info *if_int_delay_info_t; 51 52 /* 53 * File organization: 54 * - public structures 55 * - iflib accessors 56 * - iflib utility functions 57 * - iflib core functions 58 */ 59 60 typedef struct if_rxd_frag { 61 uint8_t irf_flid; 62 qidx_t irf_idx; 63 uint16_t irf_len; 64 } *if_rxd_frag_t; 65 66 /* bnxt supports 64 with hardware LRO enabled */ 67 #define IFLIB_MAX_RX_SEGS 64 68 69 typedef struct if_rxd_info { 70 /* set by iflib */ 71 uint16_t iri_qsidx; /* qset index */ 72 uint16_t iri_vtag; /* vlan tag - if flag set */ 73 /* XXX redundant with the new irf_len field */ 74 uint16_t iri_len; /* packet length */ 75 qidx_t iri_cidx; /* consumer index of cq */ 76 if_t iri_ifp; /* driver may have >1 iface per softc */ 77 78 /* updated by driver */ 79 if_rxd_frag_t iri_frags; 80 uint32_t iri_flowid; /* RSS hash for packet */ 81 uint32_t iri_csum_flags; /* m_pkthdr csum flags */ 82 83 uint32_t iri_csum_data; /* m_pkthdr csum data */ 84 uint8_t iri_flags; /* mbuf flags for packet */ 85 uint8_t iri_nfrags; /* number of fragments in packet */ 86 uint8_t iri_rsstype; /* RSS hash type */ 87 uint8_t iri_pad; /* any padding in the received data */ 88 } *if_rxd_info_t; 89 90 typedef struct if_rxd_update { 91 uint64_t *iru_paddrs; 92 qidx_t *iru_idxs; 93 qidx_t iru_pidx; 94 uint16_t iru_qsidx; 95 uint16_t iru_count; 96 uint16_t iru_buf_size; 97 uint8_t iru_flidx; 98 } *if_rxd_update_t; 99 100 #define IPI_TX_INTR 0x1 /* send an interrupt when this packet is sent */ 101 #define IPI_TX_IPV4 0x2 /* ethertype IPv4 */ 102 #define IPI_TX_IPV6 0x4 /* ethertype IPv6 */ 103 104 typedef struct if_pkt_info { 105 bus_dma_segment_t *ipi_segs; /* physical addresses */ 106 uint32_t ipi_len; /* packet length */ 107 uint16_t ipi_qsidx; /* queue set index */ 108 qidx_t ipi_nsegs; /* number of segments */ 109 110 qidx_t ipi_ndescs; /* number of descriptors used by encap */ 111 uint16_t ipi_flags; /* iflib per-packet flags */ 112 qidx_t ipi_pidx; /* start pidx for encap */ 113 qidx_t ipi_new_pidx; /* next available pidx post-encap */ 114 /* offload handling */ 115 uint8_t ipi_ehdrlen; /* ether header length */ 116 uint8_t ipi_ip_hlen; /* ip header length */ 117 uint8_t ipi_tcp_hlen; /* tcp header length */ 118 uint8_t ipi_ipproto; /* ip protocol */ 119 120 uint32_t ipi_csum_flags; /* packet checksum flags */ 121 uint16_t ipi_tso_segsz; /* tso segment size */ 122 uint16_t ipi_vtag; /* VLAN tag */ 123 uint16_t ipi_etype; /* ether header type */ 124 uint8_t ipi_tcp_hflags; /* tcp header flags */ 125 uint8_t ipi_mflags; /* packet mbuf flags */ 126 127 uint32_t ipi_tcp_seq; /* tcp seqno */ 128 uint8_t ipi_ip_tos; /* IP ToS field data */ 129 uint8_t __spare0__; 130 uint16_t __spare1__; 131 } *if_pkt_info_t; 132 133 typedef struct if_irq { 134 struct resource *ii_res; 135 int __spare0__; 136 void *ii_tag; 137 } *if_irq_t; 138 139 struct if_int_delay_info { 140 if_ctx_t iidi_ctx; /* Back-pointer to the iflib ctx (softc) */ 141 int iidi_offset; /* Register offset to read/write */ 142 int iidi_value; /* Current value in usecs */ 143 struct sysctl_oid *iidi_oidp; 144 struct sysctl_req *iidi_req; 145 }; 146 147 typedef enum { 148 IFLIB_INTR_LEGACY, 149 IFLIB_INTR_MSI, 150 IFLIB_INTR_MSIX 151 } iflib_intr_mode_t; 152 153 /* 154 * This really belongs in pciio.h or some place more general 155 * but this is the only consumer for now. 156 */ 157 typedef struct pci_vendor_info { 158 uint32_t pvi_vendor_id; 159 uint32_t pvi_device_id; 160 uint32_t pvi_subvendor_id; 161 uint32_t pvi_subdevice_id; 162 uint32_t pvi_rev_id; 163 uint32_t pvi_class_mask; 164 const char *pvi_name; 165 } pci_vendor_info_t; 166 #define PVID(vendor, devid, name) {vendor, devid, 0, 0, 0, 0, name} 167 #define PVID_OEM(vendor, devid, svid, sdevid, revid, name) {vendor, devid, svid, sdevid, revid, 0, name} 168 #define PVID_END {0, 0, 0, 0, 0, 0, NULL} 169 170 /* No drivers in tree currently match on anything except vendor:device. */ 171 #define IFLIB_PNP_DESCR "U32:vendor;U32:device;U32:#;U32:#;" \ 172 "U32:#;U32:#;D:#" 173 #define IFLIB_PNP_INFO(b, u, t) \ 174 MODULE_PNP_INFO(IFLIB_PNP_DESCR, b, u, t, nitems(t) - 1) 175 176 typedef struct if_txrx { 177 int (*ift_txd_encap) (void *, if_pkt_info_t); 178 void (*ift_txd_flush) (void *, uint16_t, qidx_t pidx); 179 int (*ift_txd_credits_update) (void *, uint16_t qsidx, bool clear); 180 181 int (*ift_rxd_available) (void *, uint16_t qsidx, qidx_t pidx, qidx_t budget); 182 int (*ift_rxd_pkt_get) (void *, if_rxd_info_t ri); 183 void (*ift_rxd_refill) (void * , if_rxd_update_t iru); 184 void (*ift_rxd_flush) (void *, uint16_t qsidx, uint8_t flidx, qidx_t pidx); 185 int (*ift_legacy_intr) (void *); 186 qidx_t (*ift_txq_select) (void *, struct mbuf *); 187 qidx_t (*ift_txq_select_v2) (void *, struct mbuf *, if_pkt_info_t); 188 } *if_txrx_t; 189 190 typedef struct if_softc_ctx { 191 int isc_vectors; 192 int isc_nrxqsets; 193 int isc_ntxqsets; 194 uint16_t __spare0__; 195 uint32_t __spare1__; 196 int isc_msix_bar; /* can be model specific - initialize in attach_pre */ 197 int isc_tx_nsegments; /* can be model specific - initialize in attach_pre */ 198 int isc_ntxd[8]; 199 int isc_nrxd[8]; 200 201 uint32_t isc_txqsizes[8]; 202 uint32_t isc_rxqsizes[8]; 203 /* is there such thing as a descriptor that is more than 248 bytes ? */ 204 uint8_t isc_txd_size[8]; 205 uint8_t isc_rxd_size[8]; 206 207 int isc_tx_tso_segments_max; 208 int isc_tx_tso_size_max; 209 int isc_tx_tso_segsize_max; 210 int isc_tx_csum_flags; 211 int isc_capabilities; 212 int isc_capenable; 213 int isc_rss_table_size; 214 int isc_rss_table_mask; 215 int isc_nrxqsets_max; 216 int isc_ntxqsets_max; 217 uint32_t __spare2__; 218 219 iflib_intr_mode_t isc_intr; 220 uint16_t isc_rxd_buf_size[8]; /* set at init time by driver, 0 221 means use iflib-calculated size 222 based on isc_max_frame_size */ 223 uint16_t isc_max_frame_size; /* set at init time by driver */ 224 uint16_t isc_min_frame_size; /* set at init time by driver, only used if 225 IFLIB_NEED_ETHER_PAD is set. */ 226 uint32_t isc_pause_frames; /* set by driver for iflib_timer to detect */ 227 uint32_t __spare3__; 228 uint32_t __spare4__; 229 uint32_t __spare5__; 230 uint32_t __spare6__; 231 uint32_t __spare7__; 232 uint32_t __spare8__; 233 caddr_t __spare9__; 234 int isc_disable_msix; 235 if_txrx_t isc_txrx; 236 struct ifmedia *isc_media; 237 bus_size_t isc_dma_width; /* device dma width in bits, 0 means 238 use BUS_SPACE_MAXADDR instead */ 239 } *if_softc_ctx_t; 240 241 /* 242 * Initialization values for device 243 */ 244 struct if_shared_ctx { 245 unsigned isc_magic; 246 driver_t *isc_driver; 247 bus_size_t isc_q_align; 248 bus_size_t isc_tx_maxsize; 249 bus_size_t isc_tx_maxsegsize; 250 bus_size_t isc_tso_maxsize; 251 bus_size_t isc_tso_maxsegsize; 252 bus_size_t isc_rx_maxsize; 253 bus_size_t isc_rx_maxsegsize; 254 int isc_rx_nsegments; 255 int isc_admin_intrcnt; /* # of admin/link interrupts */ 256 257 /* fields necessary for probe */ 258 const pci_vendor_info_t *isc_vendor_info; 259 const char *isc_driver_version; 260 /* optional function to transform the read values to match the table*/ 261 void (*isc_parse_devinfo) (uint16_t *device_id, uint16_t *subvendor_id, 262 uint16_t *subdevice_id, uint16_t *rev_id); 263 int isc_nrxd_min[8]; 264 int isc_nrxd_default[8]; 265 int isc_nrxd_max[8]; 266 int isc_ntxd_min[8]; 267 int isc_ntxd_default[8]; 268 int isc_ntxd_max[8]; 269 270 /* actively used during operation */ 271 int isc_nfl __aligned(CACHE_LINE_SIZE); 272 int isc_ntxqs; /* # of tx queues per tx qset - usually 1 */ 273 int isc_nrxqs; /* # of rx queues per rx qset - intel 1, chelsio 2, broadcom 3 */ 274 int __spare0__; 275 int isc_tx_reclaim_thresh; 276 int isc_flags; 277 }; 278 279 typedef struct iflib_dma_info { 280 bus_addr_t idi_paddr; 281 caddr_t idi_vaddr; 282 bus_dma_tag_t idi_tag; 283 bus_dmamap_t idi_map; 284 uint32_t idi_size; 285 } *iflib_dma_info_t; 286 287 #define IFLIB_MAGIC 0xCAFEF00D 288 289 typedef enum { 290 /* Interrupt or softirq handles only receive */ 291 IFLIB_INTR_RX, 292 293 /* Interrupt or softirq handles only transmit */ 294 IFLIB_INTR_TX, 295 296 /* 297 * Interrupt will check for both pending receive 298 * and available tx credits and dispatch a task 299 * for one or both depending on the disposition 300 * of the respective queues. 301 */ 302 IFLIB_INTR_RXTX, 303 304 /* 305 * Other interrupt - typically link status and 306 * or error conditions. 307 */ 308 IFLIB_INTR_ADMIN, 309 310 /* Softirq (task) for iov handling */ 311 IFLIB_INTR_IOV, 312 } iflib_intr_type_t; 313 314 /* 315 * Interface has a separate completion queue for RX 316 */ 317 #define IFLIB_HAS_RXCQ 0x01 318 /* 319 * Driver has already allocated vectors 320 */ 321 #define IFLIB_SKIP_MSIX 0x02 322 /* 323 * Interface is a virtual function 324 */ 325 #define IFLIB_IS_VF 0x04 326 /* 327 * Interface has a separate completion queue for TX 328 */ 329 #define IFLIB_HAS_TXCQ 0x08 330 /* 331 * Interface does checksum in place 332 */ 333 #define IFLIB_NEED_SCRATCH 0x10 334 /* 335 * Interface doesn't expect in_pseudo for th_sum 336 */ 337 #define IFLIB_TSO_INIT_IP 0x20 338 /* 339 * Interface doesn't align IP header 340 */ 341 #define IFLIB_DO_RX_FIXUP 0x40 342 /* 343 * Driver needs csum zeroed for offloading 344 */ 345 #define IFLIB_NEED_ZERO_CSUM 0x80 346 /* 347 * Driver needs frames padded to some minimum length 348 */ 349 #define IFLIB_NEED_ETHER_PAD 0x100 350 #define IFLIB_SPARE7 0x200 351 #define IFLIB_SPARE6 0x400 352 #define IFLIB_SPARE5 0x800 353 #define IFLIB_SPARE4 0x1000 354 #define IFLIB_SPARE3 0x2000 355 #define IFLIB_SPARE2 0x4000 356 #define IFLIB_SPARE1 0x8000 357 /* 358 * Interface needs admin task to ignore interface up/down status 359 */ 360 #define IFLIB_ADMIN_ALWAYS_RUN 0x10000 361 /* 362 * Driver will pass the media 363 */ 364 #define IFLIB_DRIVER_MEDIA 0x20000 365 /* 366 * When using a single hardware interrupt for the interface, only process RX 367 * interrupts instead of doing combined RX/TX processing. 368 */ 369 #define IFLIB_SINGLE_IRQ_RX_ONLY 0x40000 370 #define IFLIB_SPARE0 0x80000 371 /* 372 * Interface has an admin completion queue 373 */ 374 #define IFLIB_HAS_ADMINCQ 0x100000 375 /* 376 * Interface needs to preserve TX ring indices across restarts. 377 */ 378 #define IFLIB_PRESERVE_TX_INDICES 0x200000 379 380 /* The following IFLIB_FEATURE_* defines are for driver modules to determine 381 * what features this version of iflib supports. They shall be defined to the 382 * first __FreeBSD_version that introduced the feature. 383 */ 384 /* 385 * Driver can set its own TX queue selection function 386 * as ift_txq_select in struct if_txrx 387 */ 388 #define IFLIB_FEATURE_QUEUE_SELECT 1400050 389 /* 390 * Driver can set its own TX queue selection function 391 * as ift_txq_select_v2 in struct if_txrx. This includes 392 * having iflib send L3+ extra header information to the 393 * function. 394 */ 395 #define IFLIB_FEATURE_QUEUE_SELECT_V2 1400073 396 /* 397 * Driver can create subinterfaces with their own Tx/Rx queues 398 * that all share a single device (or commonly, port) 399 */ 400 #define IFLIB_FEATURE_SUB_INTERFACES 1500014 401 402 /* 403 * These enum values are used in iflib_needs_restart to indicate to iflib 404 * functions whether or not the interface needs restarting when certain events 405 * happen. 406 */ 407 enum iflib_restart_event { 408 IFLIB_RESTART_VLAN_CONFIG, 409 }; 410 411 /* 412 * field accessors 413 */ 414 void *iflib_get_softc(if_ctx_t ctx); 415 416 device_t iflib_get_dev(if_ctx_t ctx); 417 418 if_t iflib_get_ifp(if_ctx_t ctx); 419 420 struct ifmedia *iflib_get_media(if_ctx_t ctx); 421 422 if_softc_ctx_t iflib_get_softc_ctx(if_ctx_t ctx); 423 if_shared_ctx_t iflib_get_sctx(if_ctx_t ctx); 424 425 void iflib_set_mac(if_ctx_t ctx, uint8_t mac[ETHER_ADDR_LEN]); 426 void iflib_request_reset(if_ctx_t ctx); 427 uint8_t iflib_in_detach(if_ctx_t ctx); 428 429 uint32_t iflib_get_rx_mbuf_sz(if_ctx_t ctx); 430 431 /* 432 * If the driver can plug cleanly in to newbus use these 433 */ 434 int iflib_device_probe(device_t); 435 int iflib_device_attach(device_t); 436 int iflib_device_detach(device_t); 437 int iflib_device_suspend(device_t); 438 int iflib_device_resume(device_t); 439 int iflib_device_shutdown(device_t); 440 441 /* 442 * Use this instead of iflib_device_probe if the driver should report 443 * BUS_PROBE_VENDOR instead of BUS_PROBE_DEFAULT. (For example, an out-of-tree 444 * driver based on iflib). 445 */ 446 int iflib_device_probe_vendor(device_t); 447 448 int iflib_device_iov_init(device_t, uint16_t, const nvlist_t *); 449 void iflib_device_iov_uninit(device_t); 450 int iflib_device_iov_add_vf(device_t, uint16_t, const nvlist_t *); 451 452 /* 453 * If the driver can't plug cleanly in to newbus 454 * use these 455 */ 456 int iflib_device_register(device_t dev, void *softc, if_shared_ctx_t sctx, if_ctx_t *ctxp); 457 int iflib_device_deregister(if_ctx_t); 458 459 int iflib_irq_alloc(if_ctx_t, if_irq_t, int, driver_filter_t, void *filter_arg, 460 driver_intr_t, void *arg, const char *name); 461 int iflib_irq_alloc_generic(if_ctx_t ctx, if_irq_t irq, int rid, 462 iflib_intr_type_t type, driver_filter_t *filter, 463 void *filter_arg, int qid, const char *name); 464 void iflib_softirq_alloc_generic(if_ctx_t ctx, if_irq_t irq, 465 iflib_intr_type_t type, void *arg, int qid, 466 const char *name); 467 468 void iflib_irq_free(if_ctx_t ctx, if_irq_t irq); 469 470 void iflib_io_tqg_attach(struct grouptask *gt, void *uniq, int cpu, 471 const char *name); 472 473 void iflib_config_gtask_init(void *ctx, struct grouptask *gtask, 474 gtask_fn_t *fn, const char *name); 475 void iflib_config_gtask_deinit(struct grouptask *gtask); 476 477 void iflib_tx_intr_deferred(if_ctx_t ctx, int txqid); 478 void iflib_rx_intr_deferred(if_ctx_t ctx, int rxqid); 479 void iflib_admin_intr_deferred(if_ctx_t ctx); 480 void iflib_iov_intr_deferred(if_ctx_t ctx); 481 482 void iflib_link_state_change(if_ctx_t ctx, int linkstate, uint64_t baudrate); 483 484 int iflib_dma_alloc(if_ctx_t ctx, int size, iflib_dma_info_t dma, int mapflags); 485 int iflib_dma_alloc_align(if_ctx_t ctx, int size, int align, iflib_dma_info_t dma, int mapflags); 486 void iflib_dma_free(iflib_dma_info_t dma); 487 int iflib_dma_alloc_multi(if_ctx_t ctx, int *sizes, iflib_dma_info_t *dmalist, int mapflags, int count); 488 489 void iflib_dma_free_multi(iflib_dma_info_t *dmalist, int count); 490 491 struct sx *iflib_ctx_lock_get(if_ctx_t); 492 493 void iflib_led_create(if_ctx_t ctx); 494 495 void iflib_add_int_delay_sysctl(if_ctx_t, const char *, const char *, 496 if_int_delay_info_t, int, int); 497 uint16_t iflib_get_extra_msix_vectors_sysctl(if_ctx_t ctx); 498 499 /* 500 * Sub-interface support 501 */ 502 int iflib_irq_alloc_generic_subctx(if_ctx_t ctx, if_ctx_t subctx, if_irq_t irq, 503 int rid, iflib_intr_type_t type, 504 driver_filter_t *filter, void *filter_arg, 505 int qid, const char *name); 506 #endif /* __IFLIB_H_ */