1 /*- 2 * Copyright (c) 2011 Chelsio Communications, Inc. 3 * All rights reserved. 4 * Written by: Navdeep Parhar <np@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * 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 AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include "opt_inet.h" 32 #include "opt_inet6.h" 33 34 #include <sys/types.h> 35 #include <sys/eventhandler.h> 36 #include <sys/mbuf.h> 37 #include <sys/socket.h> 38 #include <sys/kernel.h> 39 #include <sys/malloc.h> 40 #include <sys/queue.h> 41 #include <sys/sbuf.h> 42 #include <sys/taskqueue.h> 43 #include <sys/time.h> 44 #include <sys/sglist.h> 45 #include <sys/sysctl.h> 46 #include <sys/smp.h> 47 #include <sys/counter.h> 48 #include <net/bpf.h> 49 #include <net/ethernet.h> 50 #include <net/if.h> 51 #include <net/if_vlan_var.h> 52 #include <netinet/in.h> 53 #include <netinet/ip.h> 54 #include <netinet/ip6.h> 55 #include <netinet/tcp.h> 56 #include <machine/md_var.h> 57 #include <vm/vm.h> 58 #include <vm/pmap.h> 59 #ifdef DEV_NETMAP 60 #include <machine/bus.h> 61 #include <sys/selinfo.h> 62 #include <net/if_var.h> 63 #include <net/netmap.h> 64 #include <dev/netmap/netmap_kern.h> 65 #endif 66 67 #include "common/common.h" 68 #include "common/t4_regs.h" 69 #include "common/t4_regs_values.h" 70 #include "common/t4_msg.h" 71 #include "t4_mp_ring.h" 72 73 #ifdef T4_PKT_TIMESTAMP 74 #define RX_COPY_THRESHOLD (MINCLSIZE - 8) 75 #else 76 #define RX_COPY_THRESHOLD MINCLSIZE 77 #endif 78 79 /* 80 * Ethernet frames are DMA'd at this byte offset into the freelist buffer. 81 * 0-7 are valid values. 82 */ 83 int fl_pktshift = 2; 84 TUNABLE_INT("hw.cxgbe.fl_pktshift", &fl_pktshift); 85 86 /* 87 * Pad ethernet payload up to this boundary. 88 * -1: driver should figure out a good value. 89 * 0: disable padding. 90 * Any power of 2 from 32 to 4096 (both inclusive) is also a valid value. 91 */ 92 int fl_pad = -1; 93 TUNABLE_INT("hw.cxgbe.fl_pad", &fl_pad); 94 95 /* 96 * Status page length. 97 * -1: driver should figure out a good value. 98 * 64 or 128 are the only other valid values. 99 */ 100 int spg_len = -1; 101 TUNABLE_INT("hw.cxgbe.spg_len", &spg_len); 102 103 /* 104 * Congestion drops. 105 * -1: no congestion feedback (not recommended). 106 * 0: backpressure the channel instead of dropping packets right away. 107 * 1: no backpressure, drop packets for the congested queue immediately. 108 */ 109 static int cong_drop = 0; 110 TUNABLE_INT("hw.cxgbe.cong_drop", &cong_drop); 111 112 /* 113 * Deliver multiple frames in the same free list buffer if they fit. 114 * -1: let the driver decide whether to enable buffer packing or not. 115 * 0: disable buffer packing. 116 * 1: enable buffer packing. 117 */ 118 static int buffer_packing = -1; 119 TUNABLE_INT("hw.cxgbe.buffer_packing", &buffer_packing); 120 121 /* 122 * Start next frame in a packed buffer at this boundary. 123 * -1: driver should figure out a good value. 124 * T4: driver will ignore this and use the same value as fl_pad above. 125 * T5: 16, or a power of 2 from 64 to 4096 (both inclusive) is a valid value. 126 */ 127 static int fl_pack = -1; 128 TUNABLE_INT("hw.cxgbe.fl_pack", &fl_pack); 129 130 /* 131 * Allow the driver to create mbuf(s) in a cluster allocated for rx. 132 * 0: never; always allocate mbufs from the zone_mbuf UMA zone. 133 * 1: ok to create mbuf(s) within a cluster if there is room. 134 */ 135 static int allow_mbufs_in_cluster = 1; 136 TUNABLE_INT("hw.cxgbe.allow_mbufs_in_cluster", &allow_mbufs_in_cluster); 137 138 /* 139 * Largest rx cluster size that the driver is allowed to allocate. 140 */ 141 static int largest_rx_cluster = MJUM16BYTES; 142 TUNABLE_INT("hw.cxgbe.largest_rx_cluster", &largest_rx_cluster); 143 144 /* 145 * Size of cluster allocation that's most likely to succeed. The driver will 146 * fall back to this size if it fails to allocate clusters larger than this. 147 */ 148 static int safest_rx_cluster = PAGE_SIZE; 149 TUNABLE_INT("hw.cxgbe.safest_rx_cluster", &safest_rx_cluster); 150 151 struct txpkts { 152 u_int wr_type; /* type 0 or type 1 */ 153 u_int npkt; /* # of packets in this work request */ 154 u_int plen; /* total payload (sum of all packets) */ 155 u_int len16; /* # of 16B pieces used by this work request */ 156 }; 157 158 /* A packet's SGL. This + m_pkthdr has all info needed for tx */ 159 struct sgl { 160 struct sglist sg; 161 struct sglist_seg seg[TX_SGL_SEGS]; 162 }; 163 164 static int service_iq(struct sge_iq *, int); 165 static struct mbuf *get_fl_payload(struct adapter *, struct sge_fl *, uint32_t); 166 static int t4_eth_rx(struct sge_iq *, const struct rss_header *, struct mbuf *); 167 static inline void init_iq(struct sge_iq *, struct adapter *, int, int, int); 168 static inline void init_fl(struct adapter *, struct sge_fl *, int, int, char *); 169 static inline void init_eq(struct sge_eq *, int, int, uint8_t, uint16_t, 170 char *); 171 static int alloc_ring(struct adapter *, size_t, bus_dma_tag_t *, bus_dmamap_t *, 172 bus_addr_t *, void **); 173 static int free_ring(struct adapter *, bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 174 void *); 175 static int alloc_iq_fl(struct port_info *, struct sge_iq *, struct sge_fl *, 176 int, int); 177 static int free_iq_fl(struct port_info *, struct sge_iq *, struct sge_fl *); 178 static void add_fl_sysctls(struct sysctl_ctx_list *, struct sysctl_oid *, 179 struct sge_fl *); 180 static int alloc_fwq(struct adapter *); 181 static int free_fwq(struct adapter *); 182 static int alloc_mgmtq(struct adapter *); 183 static int free_mgmtq(struct adapter *); 184 static int alloc_rxq(struct port_info *, struct sge_rxq *, int, int, 185 struct sysctl_oid *); 186 static int free_rxq(struct port_info *, struct sge_rxq *); 187 #ifdef TCP_OFFLOAD 188 static int alloc_ofld_rxq(struct port_info *, struct sge_ofld_rxq *, int, int, 189 struct sysctl_oid *); 190 static int free_ofld_rxq(struct port_info *, struct sge_ofld_rxq *); 191 #endif 192 #ifdef DEV_NETMAP 193 static int alloc_nm_rxq(struct port_info *, struct sge_nm_rxq *, int, int, 194 struct sysctl_oid *); 195 static int free_nm_rxq(struct port_info *, struct sge_nm_rxq *); 196 static int alloc_nm_txq(struct port_info *, struct sge_nm_txq *, int, int, 197 struct sysctl_oid *); 198 static int free_nm_txq(struct port_info *, struct sge_nm_txq *); 199 #endif 200 static int ctrl_eq_alloc(struct adapter *, struct sge_eq *); 201 static int eth_eq_alloc(struct adapter *, struct port_info *, struct sge_eq *); 202 #ifdef TCP_OFFLOAD 203 static int ofld_eq_alloc(struct adapter *, struct port_info *, struct sge_eq *); 204 #endif 205 static int alloc_eq(struct adapter *, struct port_info *, struct sge_eq *); 206 static int free_eq(struct adapter *, struct sge_eq *); 207 static int alloc_wrq(struct adapter *, struct port_info *, struct sge_wrq *, 208 struct sysctl_oid *); 209 static int free_wrq(struct adapter *, struct sge_wrq *); 210 static int alloc_txq(struct port_info *, struct sge_txq *, int, 211 struct sysctl_oid *); 212 static int free_txq(struct port_info *, struct sge_txq *); 213 static void oneseg_dma_callback(void *, bus_dma_segment_t *, int, int); 214 static inline void ring_fl_db(struct adapter *, struct sge_fl *); 215 static int refill_fl(struct adapter *, struct sge_fl *, int); 216 static void refill_sfl(void *); 217 static int alloc_fl_sdesc(struct sge_fl *); 218 static void free_fl_sdesc(struct adapter *, struct sge_fl *); 219 static void find_best_refill_source(struct adapter *, struct sge_fl *, int); 220 static void find_safe_refill_source(struct adapter *, struct sge_fl *); 221 static void add_fl_to_sfl(struct adapter *, struct sge_fl *); 222 223 static inline void get_pkt_gl(struct mbuf *, struct sglist *); 224 static inline u_int txpkt_len16(u_int, u_int); 225 static inline u_int txpkts0_len16(u_int); 226 static inline u_int txpkts1_len16(void); 227 static u_int write_txpkt_wr(struct sge_txq *, struct fw_eth_tx_pkt_wr *, 228 struct mbuf *, u_int); 229 static int try_txpkts(struct mbuf *, struct mbuf *, struct txpkts *, u_int); 230 static int add_to_txpkts(struct mbuf *, struct txpkts *, u_int); 231 static u_int write_txpkts_wr(struct sge_txq *, struct fw_eth_tx_pkts_wr *, 232 struct mbuf *, const struct txpkts *, u_int); 233 static void write_gl_to_txd(struct sge_txq *, struct mbuf *, caddr_t *, int); 234 static inline void copy_to_txd(struct sge_eq *, caddr_t, caddr_t *, int); 235 static inline void ring_eq_db(struct adapter *, struct sge_eq *, u_int); 236 static inline uint16_t read_hw_cidx(struct sge_eq *); 237 static inline u_int reclaimable_tx_desc(struct sge_eq *); 238 static inline u_int total_available_tx_desc(struct sge_eq *); 239 static u_int reclaim_tx_descs(struct sge_txq *, u_int); 240 static void tx_reclaim(void *, int); 241 static __be64 get_flit(struct sglist_seg *, int, int); 242 static int handle_sge_egr_update(struct sge_iq *, const struct rss_header *, 243 struct mbuf *); 244 static int handle_fw_msg(struct sge_iq *, const struct rss_header *, 245 struct mbuf *); 246 static void wrq_tx_drain(void *, int); 247 static void drain_wrq_wr_list(struct adapter *, struct sge_wrq *); 248 249 static int sysctl_uint16(SYSCTL_HANDLER_ARGS); 250 static int sysctl_bufsizes(SYSCTL_HANDLER_ARGS); 251 252 static counter_u64_t extfree_refs; 253 static counter_u64_t extfree_rels; 254 255 /* 256 * Called on MOD_LOAD. Validates and calculates the SGE tunables. 257 */ 258 void 259 t4_sge_modload(void) 260 { 261 262 if (fl_pktshift < 0 || fl_pktshift > 7) { 263 printf("Invalid hw.cxgbe.fl_pktshift value (%d)," 264 " using 2 instead.\n", fl_pktshift); 265 fl_pktshift = 2; 266 } 267 268 if (spg_len != 64 && spg_len != 128) { 269 int len; 270 271 #if defined(__i386__) || defined(__amd64__) 272 len = cpu_clflush_line_size > 64 ? 128 : 64; 273 #else 274 len = 64; 275 #endif 276 if (spg_len != -1) { 277 printf("Invalid hw.cxgbe.spg_len value (%d)," 278 " using %d instead.\n", spg_len, len); 279 } 280 spg_len = len; 281 } 282 283 if (cong_drop < -1 || cong_drop > 1) { 284 printf("Invalid hw.cxgbe.cong_drop value (%d)," 285 " using 0 instead.\n", cong_drop); 286 cong_drop = 0; 287 } 288 289 extfree_refs = counter_u64_alloc(M_WAITOK); 290 extfree_rels = counter_u64_alloc(M_WAITOK); 291 counter_u64_zero(extfree_refs); 292 counter_u64_zero(extfree_rels); 293 } 294 295 void 296 t4_sge_modunload(void) 297 { 298 299 counter_u64_free(extfree_refs); 300 counter_u64_free(extfree_rels); 301 } 302 303 uint64_t 304 t4_sge_extfree_refs(void) 305 { 306 uint64_t refs, rels; 307 308 rels = counter_u64_fetch(extfree_rels); 309 refs = counter_u64_fetch(extfree_refs); 310 311 return (refs - rels); 312 } 313 314 void 315 t4_init_sge_cpl_handlers(struct adapter *sc) 316 { 317 318 t4_register_cpl_handler(sc, CPL_FW4_MSG, handle_fw_msg); 319 t4_register_cpl_handler(sc, CPL_FW6_MSG, handle_fw_msg); 320 t4_register_cpl_handler(sc, CPL_SGE_EGR_UPDATE, handle_sge_egr_update); 321 t4_register_cpl_handler(sc, CPL_RX_PKT, t4_eth_rx); 322 t4_register_fw_msg_handler(sc, FW6_TYPE_CMD_RPL, t4_handle_fw_rpl); 323 } 324 325 static inline void 326 setup_pad_and_pack_boundaries(struct adapter *sc) 327 { 328 uint32_t v, m; 329 int pad, pack; 330 331 pad = fl_pad; 332 if (fl_pad < 32 || fl_pad > 4096 || !powerof2(fl_pad)) { 333 /* 334 * If there is any chance that we might use buffer packing and 335 * the chip is a T4, then pick 64 as the pad/pack boundary. Set 336 * it to 32 in all other cases. 337 */ 338 pad = is_t4(sc) && buffer_packing ? 64 : 32; 339 340 /* 341 * For fl_pad = 0 we'll still write a reasonable value to the 342 * register but all the freelists will opt out of padding. 343 * We'll complain here only if the user tried to set it to a 344 * value greater than 0 that was invalid. 345 */ 346 if (fl_pad > 0) { 347 device_printf(sc->dev, "Invalid hw.cxgbe.fl_pad value" 348 " (%d), using %d instead.\n", fl_pad, pad); 349 } 350 } 351 m = V_INGPADBOUNDARY(M_INGPADBOUNDARY); 352 v = V_INGPADBOUNDARY(ilog2(pad) - 5); 353 t4_set_reg_field(sc, A_SGE_CONTROL, m, v); 354 355 if (is_t4(sc)) { 356 if (fl_pack != -1 && fl_pack != pad) { 357 /* Complain but carry on. */ 358 device_printf(sc->dev, "hw.cxgbe.fl_pack (%d) ignored," 359 " using %d instead.\n", fl_pack, pad); 360 } 361 return; 362 } 363 364 pack = fl_pack; 365 if (fl_pack < 16 || fl_pack == 32 || fl_pack > 4096 || 366 !powerof2(fl_pack)) { 367 pack = max(sc->params.pci.mps, CACHE_LINE_SIZE); 368 MPASS(powerof2(pack)); 369 if (pack < 16) 370 pack = 16; 371 if (pack == 32) 372 pack = 64; 373 if (pack > 4096) 374 pack = 4096; 375 if (fl_pack != -1) { 376 device_printf(sc->dev, "Invalid hw.cxgbe.fl_pack value" 377 " (%d), using %d instead.\n", fl_pack, pack); 378 } 379 } 380 m = V_INGPACKBOUNDARY(M_INGPACKBOUNDARY); 381 if (pack == 16) 382 v = V_INGPACKBOUNDARY(0); 383 else 384 v = V_INGPACKBOUNDARY(ilog2(pack) - 5); 385 386 MPASS(!is_t4(sc)); /* T4 doesn't have SGE_CONTROL2 */ 387 t4_set_reg_field(sc, A_SGE_CONTROL2, m, v); 388 } 389 390 /* 391 * adap->params.vpd.cclk must be set up before this is called. 392 */ 393 void 394 t4_tweak_chip_settings(struct adapter *sc) 395 { 396 int i; 397 uint32_t v, m; 398 int intr_timer[SGE_NTIMERS] = {1, 5, 10, 50, 100, 200}; 399 int timer_max = M_TIMERVALUE0 * 1000 / sc->params.vpd.cclk; 400 int intr_pktcount[SGE_NCOUNTERS] = {1, 8, 16, 32}; /* 63 max */ 401 uint16_t indsz = min(RX_COPY_THRESHOLD - 1, M_INDICATESIZE); 402 static int sge_flbuf_sizes[] = { 403 MCLBYTES, 404 #if MJUMPAGESIZE != MCLBYTES 405 MJUMPAGESIZE, 406 MJUMPAGESIZE - CL_METADATA_SIZE, 407 MJUMPAGESIZE - 2 * MSIZE - CL_METADATA_SIZE, 408 #endif 409 MJUM9BYTES, 410 MJUM16BYTES, 411 MCLBYTES - MSIZE - CL_METADATA_SIZE, 412 MJUM9BYTES - CL_METADATA_SIZE, 413 MJUM16BYTES - CL_METADATA_SIZE, 414 }; 415 416 KASSERT(sc->flags & MASTER_PF, 417 ("%s: trying to change chip settings when not master.", __func__)); 418 419 m = V_PKTSHIFT(M_PKTSHIFT) | F_RXPKTCPLMODE | F_EGRSTATUSPAGESIZE; 420 v = V_PKTSHIFT(fl_pktshift) | F_RXPKTCPLMODE | 421 V_EGRSTATUSPAGESIZE(spg_len == 128); 422 t4_set_reg_field(sc, A_SGE_CONTROL, m, v); 423 424 setup_pad_and_pack_boundaries(sc); 425 426 v = V_HOSTPAGESIZEPF0(PAGE_SHIFT - 10) | 427 V_HOSTPAGESIZEPF1(PAGE_SHIFT - 10) | 428 V_HOSTPAGESIZEPF2(PAGE_SHIFT - 10) | 429 V_HOSTPAGESIZEPF3(PAGE_SHIFT - 10) | 430 V_HOSTPAGESIZEPF4(PAGE_SHIFT - 10) | 431 V_HOSTPAGESIZEPF5(PAGE_SHIFT - 10) | 432 V_HOSTPAGESIZEPF6(PAGE_SHIFT - 10) | 433 V_HOSTPAGESIZEPF7(PAGE_SHIFT - 10); 434 t4_write_reg(sc, A_SGE_HOST_PAGE_SIZE, v); 435 436 KASSERT(nitems(sge_flbuf_sizes) <= SGE_FLBUF_SIZES, 437 ("%s: hw buffer size table too big", __func__)); 438 for (i = 0; i < min(nitems(sge_flbuf_sizes), SGE_FLBUF_SIZES); i++) { 439 t4_write_reg(sc, A_SGE_FL_BUFFER_SIZE0 + (4 * i), 440 sge_flbuf_sizes[i]); 441 } 442 443 v = V_THRESHOLD_0(intr_pktcount[0]) | V_THRESHOLD_1(intr_pktcount[1]) | 444 V_THRESHOLD_2(intr_pktcount[2]) | V_THRESHOLD_3(intr_pktcount[3]); 445 t4_write_reg(sc, A_SGE_INGRESS_RX_THRESHOLD, v); 446 447 KASSERT(intr_timer[0] <= timer_max, 448 ("%s: not a single usable timer (%d, %d)", __func__, intr_timer[0], 449 timer_max)); 450 for (i = 1; i < nitems(intr_timer); i++) { 451 KASSERT(intr_timer[i] >= intr_timer[i - 1], 452 ("%s: timers not listed in increasing order (%d)", 453 __func__, i)); 454 455 while (intr_timer[i] > timer_max) { 456 if (i == nitems(intr_timer) - 1) { 457 intr_timer[i] = timer_max; 458 break; 459 } 460 intr_timer[i] += intr_timer[i - 1]; 461 intr_timer[i] /= 2; 462 } 463 } 464 465 v = V_TIMERVALUE0(us_to_core_ticks(sc, intr_timer[0])) | 466 V_TIMERVALUE1(us_to_core_ticks(sc, intr_timer[1])); 467 t4_write_reg(sc, A_SGE_TIMER_VALUE_0_AND_1, v); 468 v = V_TIMERVALUE2(us_to_core_ticks(sc, intr_timer[2])) | 469 V_TIMERVALUE3(us_to_core_ticks(sc, intr_timer[3])); 470 t4_write_reg(sc, A_SGE_TIMER_VALUE_2_AND_3, v); 471 v = V_TIMERVALUE4(us_to_core_ticks(sc, intr_timer[4])) | 472 V_TIMERVALUE5(us_to_core_ticks(sc, intr_timer[5])); 473 t4_write_reg(sc, A_SGE_TIMER_VALUE_4_AND_5, v); 474 475 if (cong_drop == 0) { 476 m = F_TUNNELCNGDROP0 | F_TUNNELCNGDROP1 | F_TUNNELCNGDROP2 | 477 F_TUNNELCNGDROP3; 478 t4_set_reg_field(sc, A_TP_PARA_REG3, m, 0); 479 } 480 481 /* 4K, 16K, 64K, 256K DDP "page sizes" */ 482 v = V_HPZ0(0) | V_HPZ1(2) | V_HPZ2(4) | V_HPZ3(6); 483 t4_write_reg(sc, A_ULP_RX_TDDP_PSZ, v); 484 485 m = v = F_TDDPTAGTCB; 486 t4_set_reg_field(sc, A_ULP_RX_CTL, m, v); 487 488 m = V_INDICATESIZE(M_INDICATESIZE) | F_REARMDDPOFFSET | 489 F_RESETDDPOFFSET; 490 v = V_INDICATESIZE(indsz) | F_REARMDDPOFFSET | F_RESETDDPOFFSET; 491 t4_set_reg_field(sc, A_TP_PARA_REG5, m, v); 492 } 493 494 /* 495 * SGE wants the buffer to be at least 64B and then a multiple of 16. If 496 * padding is is use the buffer's start and end need to be aligned to the pad 497 * boundary as well. We'll just make sure that the size is a multiple of the 498 * boundary here, it is up to the buffer allocation code to make sure the start 499 * of the buffer is aligned as well. 500 */ 501 static inline int 502 hwsz_ok(struct adapter *sc, int hwsz) 503 { 504 int mask = fl_pad ? sc->sge.pad_boundary - 1 : 16 - 1; 505 506 return (hwsz >= 64 && (hwsz & mask) == 0); 507 } 508 509 /* 510 * XXX: driver really should be able to deal with unexpected settings. 511 */ 512 int 513 t4_read_chip_settings(struct adapter *sc) 514 { 515 struct sge *s = &sc->sge; 516 int i, j, n, rc = 0; 517 uint32_t m, v, r; 518 uint16_t indsz = min(RX_COPY_THRESHOLD - 1, M_INDICATESIZE); 519 static int sw_buf_sizes[] = { /* Sorted by size */ 520 MCLBYTES, 521 #if MJUMPAGESIZE != MCLBYTES 522 MJUMPAGESIZE, 523 #endif 524 MJUM9BYTES, 525 MJUM16BYTES 526 }; 527 struct sw_zone_info *swz, *safe_swz; 528 struct hw_buf_info *hwb; 529 530 m = V_PKTSHIFT(M_PKTSHIFT) | F_RXPKTCPLMODE | F_EGRSTATUSPAGESIZE; 531 v = V_PKTSHIFT(fl_pktshift) | F_RXPKTCPLMODE | 532 V_EGRSTATUSPAGESIZE(spg_len == 128); 533 r = t4_read_reg(sc, A_SGE_CONTROL); 534 if ((r & m) != v) { 535 device_printf(sc->dev, "invalid SGE_CONTROL(0x%x)\n", r); 536 rc = EINVAL; 537 } 538 s->pad_boundary = 1 << (G_INGPADBOUNDARY(r) + 5); 539 540 if (is_t4(sc)) 541 s->pack_boundary = s->pad_boundary; 542 else { 543 r = t4_read_reg(sc, A_SGE_CONTROL2); 544 if (G_INGPACKBOUNDARY(r) == 0) 545 s->pack_boundary = 16; 546 else 547 s->pack_boundary = 1 << (G_INGPACKBOUNDARY(r) + 5); 548 } 549 550 v = V_HOSTPAGESIZEPF0(PAGE_SHIFT - 10) | 551 V_HOSTPAGESIZEPF1(PAGE_SHIFT - 10) | 552 V_HOSTPAGESIZEPF2(PAGE_SHIFT - 10) | 553 V_HOSTPAGESIZEPF3(PAGE_SHIFT - 10) | 554 V_HOSTPAGESIZEPF4(PAGE_SHIFT - 10) | 555 V_HOSTPAGESIZEPF5(PAGE_SHIFT - 10) | 556 V_HOSTPAGESIZEPF6(PAGE_SHIFT - 10) | 557 V_HOSTPAGESIZEPF7(PAGE_SHIFT - 10); 558 r = t4_read_reg(sc, A_SGE_HOST_PAGE_SIZE); 559 if (r != v) { 560 device_printf(sc->dev, "invalid SGE_HOST_PAGE_SIZE(0x%x)\n", r); 561 rc = EINVAL; 562 } 563 564 /* Filter out unusable hw buffer sizes entirely (mark with -2). */ 565 hwb = &s->hw_buf_info[0]; 566 for (i = 0; i < nitems(s->hw_buf_info); i++, hwb++) { 567 r = t4_read_reg(sc, A_SGE_FL_BUFFER_SIZE0 + (4 * i)); 568 hwb->size = r; 569 hwb->zidx = hwsz_ok(sc, r) ? -1 : -2; 570 hwb->next = -1; 571 } 572 573 /* 574 * Create a sorted list in decreasing order of hw buffer sizes (and so 575 * increasing order of spare area) for each software zone. 576 * 577 * If padding is enabled then the start and end of the buffer must align 578 * to the pad boundary; if packing is enabled then they must align with 579 * the pack boundary as well. Allocations from the cluster zones are 580 * aligned to min(size, 4K), so the buffer starts at that alignment and 581 * ends at hwb->size alignment. If mbuf inlining is allowed the 582 * starting alignment will be reduced to MSIZE and the driver will 583 * exercise appropriate caution when deciding on the best buffer layout 584 * to use. 585 */ 586 n = 0; /* no usable buffer size to begin with */ 587 swz = &s->sw_zone_info[0]; 588 safe_swz = NULL; 589 for (i = 0; i < SW_ZONE_SIZES; i++, swz++) { 590 int8_t head = -1, tail = -1; 591 592 swz->size = sw_buf_sizes[i]; 593 swz->zone = m_getzone(swz->size); 594 swz->type = m_gettype(swz->size); 595 596 if (swz->size < PAGE_SIZE) { 597 MPASS(powerof2(swz->size)); 598 if (fl_pad && (swz->size % sc->sge.pad_boundary != 0)) 599 continue; 600 } 601 602 if (swz->size == safest_rx_cluster) 603 safe_swz = swz; 604 605 hwb = &s->hw_buf_info[0]; 606 for (j = 0; j < SGE_FLBUF_SIZES; j++, hwb++) { 607 if (hwb->zidx != -1 || hwb->size > swz->size) 608 continue; 609 #ifdef INVARIANTS 610 if (fl_pad) 611 MPASS(hwb->size % sc->sge.pad_boundary == 0); 612 #endif 613 hwb->zidx = i; 614 if (head == -1) 615 head = tail = j; 616 else if (hwb->size < s->hw_buf_info[tail].size) { 617 s->hw_buf_info[tail].next = j; 618 tail = j; 619 } else { 620 int8_t *cur; 621 struct hw_buf_info *t; 622 623 for (cur = &head; *cur != -1; cur = &t->next) { 624 t = &s->hw_buf_info[*cur]; 625 if (hwb->size == t->size) { 626 hwb->zidx = -2; 627 break; 628 } 629 if (hwb->size > t->size) { 630 hwb->next = *cur; 631 *cur = j; 632 break; 633 } 634 } 635 } 636 } 637 swz->head_hwidx = head; 638 swz->tail_hwidx = tail; 639 640 if (tail != -1) { 641 n++; 642 if (swz->size - s->hw_buf_info[tail].size >= 643 CL_METADATA_SIZE) 644 sc->flags |= BUF_PACKING_OK; 645 } 646 } 647 if (n == 0) { 648 device_printf(sc->dev, "no usable SGE FL buffer size.\n"); 649 rc = EINVAL; 650 } 651 652 s->safe_hwidx1 = -1; 653 s->safe_hwidx2 = -1; 654 if (safe_swz != NULL) { 655 s->safe_hwidx1 = safe_swz->head_hwidx; 656 for (i = safe_swz->head_hwidx; i != -1; i = hwb->next) { 657 int spare; 658 659 hwb = &s->hw_buf_info[i]; 660 #ifdef INVARIANTS 661 if (fl_pad) 662 MPASS(hwb->size % sc->sge.pad_boundary == 0); 663 #endif 664 spare = safe_swz->size - hwb->size; 665 if (spare >= CL_METADATA_SIZE) { 666 s->safe_hwidx2 = i; 667 break; 668 } 669 } 670 } 671 672 r = t4_read_reg(sc, A_SGE_INGRESS_RX_THRESHOLD); 673 s->counter_val[0] = G_THRESHOLD_0(r); 674 s->counter_val[1] = G_THRESHOLD_1(r); 675 s->counter_val[2] = G_THRESHOLD_2(r); 676 s->counter_val[3] = G_THRESHOLD_3(r); 677 678 r = t4_read_reg(sc, A_SGE_TIMER_VALUE_0_AND_1); 679 s->timer_val[0] = G_TIMERVALUE0(r) / core_ticks_per_usec(sc); 680 s->timer_val[1] = G_TIMERVALUE1(r) / core_ticks_per_usec(sc); 681 r = t4_read_reg(sc, A_SGE_TIMER_VALUE_2_AND_3); 682 s->timer_val[2] = G_TIMERVALUE2(r) / core_ticks_per_usec(sc); 683 s->timer_val[3] = G_TIMERVALUE3(r) / core_ticks_per_usec(sc); 684 r = t4_read_reg(sc, A_SGE_TIMER_VALUE_4_AND_5); 685 s->timer_val[4] = G_TIMERVALUE4(r) / core_ticks_per_usec(sc); 686 s->timer_val[5] = G_TIMERVALUE5(r) / core_ticks_per_usec(sc); 687 688 if (cong_drop == 0) { 689 m = F_TUNNELCNGDROP0 | F_TUNNELCNGDROP1 | F_TUNNELCNGDROP2 | 690 F_TUNNELCNGDROP3; 691 r = t4_read_reg(sc, A_TP_PARA_REG3); 692 if (r & m) { 693 device_printf(sc->dev, 694 "invalid TP_PARA_REG3(0x%x)\n", r); 695 rc = EINVAL; 696 } 697 } 698 699 v = V_HPZ0(0) | V_HPZ1(2) | V_HPZ2(4) | V_HPZ3(6); 700 r = t4_read_reg(sc, A_ULP_RX_TDDP_PSZ); 701 if (r != v) { 702 device_printf(sc->dev, "invalid ULP_RX_TDDP_PSZ(0x%x)\n", r); 703 rc = EINVAL; 704 } 705 706 m = v = F_TDDPTAGTCB; 707 r = t4_read_reg(sc, A_ULP_RX_CTL); 708 if ((r & m) != v) { 709 device_printf(sc->dev, "invalid ULP_RX_CTL(0x%x)\n", r); 710 rc = EINVAL; 711 } 712 713 m = V_INDICATESIZE(M_INDICATESIZE) | F_REARMDDPOFFSET | 714 F_RESETDDPOFFSET; 715 v = V_INDICATESIZE(indsz) | F_REARMDDPOFFSET | F_RESETDDPOFFSET; 716 r = t4_read_reg(sc, A_TP_PARA_REG5); 717 if ((r & m) != v) { 718 device_printf(sc->dev, "invalid TP_PARA_REG5(0x%x)\n", r); 719 rc = EINVAL; 720 } 721 722 r = t4_read_reg(sc, A_SGE_CONM_CTRL); 723 s->fl_starve_threshold = G_EGRTHRESHOLD(r) * 2 + 1; 724 if (is_t4(sc)) 725 s->fl_starve_threshold2 = s->fl_starve_threshold; 726 else 727 s->fl_starve_threshold2 = G_EGRTHRESHOLDPACKING(r) * 2 + 1; 728 729 /* egress queues: log2 of # of doorbells per BAR2 page */ 730 r = t4_read_reg(sc, A_SGE_EGRESS_QUEUES_PER_PAGE_PF); 731 r >>= S_QUEUESPERPAGEPF0 + 732 (S_QUEUESPERPAGEPF1 - S_QUEUESPERPAGEPF0) * sc->pf; 733 s->eq_s_qpp = r & M_QUEUESPERPAGEPF0; 734 735 /* ingress queues: log2 of # of doorbells per BAR2 page */ 736 r = t4_read_reg(sc, A_SGE_INGRESS_QUEUES_PER_PAGE_PF); 737 r >>= S_QUEUESPERPAGEPF0 + 738 (S_QUEUESPERPAGEPF1 - S_QUEUESPERPAGEPF0) * sc->pf; 739 s->iq_s_qpp = r & M_QUEUESPERPAGEPF0; 740 741 t4_init_tp_params(sc); 742 743 t4_read_mtu_tbl(sc, sc->params.mtus, NULL); 744 t4_load_mtus(sc, sc->params.mtus, sc->params.a_wnd, sc->params.b_wnd); 745 746 return (rc); 747 } 748 749 int 750 t4_create_dma_tag(struct adapter *sc) 751 { 752 int rc; 753 754 rc = bus_dma_tag_create(bus_get_dma_tag(sc->dev), 1, 0, 755 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, BUS_SPACE_MAXSIZE, 756 BUS_SPACE_UNRESTRICTED, BUS_SPACE_MAXSIZE, BUS_DMA_ALLOCNOW, NULL, 757 NULL, &sc->dmat); 758 if (rc != 0) { 759 device_printf(sc->dev, 760 "failed to create main DMA tag: %d\n", rc); 761 } 762 763 return (rc); 764 } 765 766 void 767 t4_sge_sysctls(struct adapter *sc, struct sysctl_ctx_list *ctx, 768 struct sysctl_oid_list *children) 769 { 770 771 SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "buffer_sizes", 772 CTLTYPE_STRING | CTLFLAG_RD, &sc->sge, 0, sysctl_bufsizes, "A", 773 "freelist buffer sizes"); 774 775 SYSCTL_ADD_INT(ctx, children, OID_AUTO, "fl_pktshift", CTLFLAG_RD, 776 NULL, fl_pktshift, "payload DMA offset in rx buffer (bytes)"); 777 778 SYSCTL_ADD_INT(ctx, children, OID_AUTO, "fl_pad", CTLFLAG_RD, 779 NULL, sc->sge.pad_boundary, "payload pad boundary (bytes)"); 780 781 SYSCTL_ADD_INT(ctx, children, OID_AUTO, "spg_len", CTLFLAG_RD, 782 NULL, spg_len, "status page size (bytes)"); 783 784 SYSCTL_ADD_INT(ctx, children, OID_AUTO, "cong_drop", CTLFLAG_RD, 785 NULL, cong_drop, "congestion drop setting"); 786 787 SYSCTL_ADD_INT(ctx, children, OID_AUTO, "fl_pack", CTLFLAG_RD, 788 NULL, sc->sge.pack_boundary, "payload pack boundary (bytes)"); 789 } 790 791 int 792 t4_destroy_dma_tag(struct adapter *sc) 793 { 794 if (sc->dmat) 795 bus_dma_tag_destroy(sc->dmat); 796 797 return (0); 798 } 799 800 /* 801 * Allocate and initialize the firmware event queue and the management queue. 802 * 803 * Returns errno on failure. Resources allocated up to that point may still be 804 * allocated. Caller is responsible for cleanup in case this function fails. 805 */ 806 int 807 t4_setup_adapter_queues(struct adapter *sc) 808 { 809 int rc; 810 811 ADAPTER_LOCK_ASSERT_NOTOWNED(sc); 812 813 sysctl_ctx_init(&sc->ctx); 814 sc->flags |= ADAP_SYSCTL_CTX; 815 816 /* 817 * Firmware event queue 818 */ 819 rc = alloc_fwq(sc); 820 if (rc != 0) 821 return (rc); 822 823 /* 824 * Management queue. This is just a control queue that uses the fwq as 825 * its associated iq. 826 */ 827 rc = alloc_mgmtq(sc); 828 829 return (rc); 830 } 831 832 /* 833 * Idempotent 834 */ 835 int 836 t4_teardown_adapter_queues(struct adapter *sc) 837 { 838 839 ADAPTER_LOCK_ASSERT_NOTOWNED(sc); 840 841 /* Do this before freeing the queue */ 842 if (sc->flags & ADAP_SYSCTL_CTX) { 843 sysctl_ctx_free(&sc->ctx); 844 sc->flags &= ~ADAP_SYSCTL_CTX; 845 } 846 847 free_mgmtq(sc); 848 free_fwq(sc); 849 850 return (0); 851 } 852 853 static inline int 854 port_intr_count(struct port_info *pi) 855 { 856 int rc = 0; 857 858 if (pi->flags & INTR_RXQ) 859 rc += pi->nrxq; 860 #ifdef TCP_OFFLOAD 861 if (pi->flags & INTR_OFLD_RXQ) 862 rc += pi->nofldrxq; 863 #endif 864 #ifdef DEV_NETMAP 865 if (pi->flags & INTR_NM_RXQ) 866 rc += pi->nnmrxq; 867 #endif 868 return (rc); 869 } 870 871 static inline int 872 first_vector(struct port_info *pi) 873 { 874 struct adapter *sc = pi->adapter; 875 int rc = T4_EXTRA_INTR, i; 876 877 if (sc->intr_count == 1) 878 return (0); 879 880 for_each_port(sc, i) { 881 if (i == pi->port_id) 882 break; 883 884 rc += port_intr_count(sc->port[i]); 885 } 886 887 return (rc); 888 } 889 890 /* 891 * Given an arbitrary "index," come up with an iq that can be used by other 892 * queues (of this port) for interrupt forwarding, SGE egress updates, etc. 893 * The iq returned is guaranteed to be something that takes direct interrupts. 894 */ 895 static struct sge_iq * 896 port_intr_iq(struct port_info *pi, int idx) 897 { 898 struct adapter *sc = pi->adapter; 899 struct sge *s = &sc->sge; 900 struct sge_iq *iq = NULL; 901 int nintr, i; 902 903 if (sc->intr_count == 1) 904 return (&sc->sge.fwq); 905 906 nintr = port_intr_count(pi); 907 KASSERT(nintr != 0, 908 ("%s: pi %p has no exclusive interrupts, total interrupts = %d", 909 __func__, pi, sc->intr_count)); 910 #ifdef DEV_NETMAP 911 /* Exclude netmap queues as they can't take anyone else's interrupts */ 912 if (pi->flags & INTR_NM_RXQ) 913 nintr -= pi->nnmrxq; 914 KASSERT(nintr > 0, 915 ("%s: pi %p has nintr %d after netmap adjustment of %d", __func__, 916 pi, nintr, pi->nnmrxq)); 917 #endif 918 i = idx % nintr; 919 920 if (pi->flags & INTR_RXQ) { 921 if (i < pi->nrxq) { 922 iq = &s->rxq[pi->first_rxq + i].iq; 923 goto done; 924 } 925 i -= pi->nrxq; 926 } 927 #ifdef TCP_OFFLOAD 928 if (pi->flags & INTR_OFLD_RXQ) { 929 if (i < pi->nofldrxq) { 930 iq = &s->ofld_rxq[pi->first_ofld_rxq + i].iq; 931 goto done; 932 } 933 i -= pi->nofldrxq; 934 } 935 #endif 936 panic("%s: pi %p, intr_flags 0x%lx, idx %d, total intr %d\n", __func__, 937 pi, pi->flags & INTR_ALL, idx, nintr); 938 done: 939 MPASS(iq != NULL); 940 KASSERT(iq->flags & IQ_INTR, 941 ("%s: iq %p (port %p, intr_flags 0x%lx, idx %d)", __func__, iq, pi, 942 pi->flags & INTR_ALL, idx)); 943 return (iq); 944 } 945 946 /* Maximum payload that can be delivered with a single iq descriptor */ 947 static inline int 948 mtu_to_max_payload(struct adapter *sc, int mtu, const int toe) 949 { 950 int payload; 951 952 #ifdef TCP_OFFLOAD 953 if (toe) { 954 payload = sc->tt.rx_coalesce ? 955 G_RXCOALESCESIZE(t4_read_reg(sc, A_TP_PARA_REG2)) : mtu; 956 } else { 957 #endif 958 /* large enough even when hw VLAN extraction is disabled */ 959 payload = fl_pktshift + ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN + 960 mtu; 961 #ifdef TCP_OFFLOAD 962 } 963 #endif 964 965 return (payload); 966 } 967 968 int 969 t4_setup_port_queues(struct port_info *pi) 970 { 971 int rc = 0, i, j, intr_idx, iqid; 972 struct sge_rxq *rxq; 973 struct sge_txq *txq; 974 struct sge_wrq *ctrlq; 975 #ifdef TCP_OFFLOAD 976 struct sge_ofld_rxq *ofld_rxq; 977 struct sge_wrq *ofld_txq; 978 #endif 979 #ifdef DEV_NETMAP 980 struct sge_nm_rxq *nm_rxq; 981 struct sge_nm_txq *nm_txq; 982 #endif 983 char name[16]; 984 struct adapter *sc = pi->adapter; 985 struct ifnet *ifp = pi->ifp; 986 struct sysctl_oid *oid = device_get_sysctl_tree(pi->dev); 987 struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid); 988 int maxp, mtu = ifp->if_mtu; 989 990 /* Interrupt vector to start from (when using multiple vectors) */ 991 intr_idx = first_vector(pi); 992 993 /* 994 * First pass over all NIC and TOE rx queues: 995 * a) initialize iq and fl 996 * b) allocate queue iff it will take direct interrupts. 997 */ 998 maxp = mtu_to_max_payload(sc, mtu, 0); 999 if (pi->flags & INTR_RXQ) { 1000 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "rxq", 1001 CTLFLAG_RD, NULL, "rx queues"); 1002 } 1003 for_each_rxq(pi, i, rxq) { 1004 1005 init_iq(&rxq->iq, sc, pi->tmr_idx, pi->pktc_idx, pi->qsize_rxq); 1006 1007 snprintf(name, sizeof(name), "%s rxq%d-fl", 1008 device_get_nameunit(pi->dev), i); 1009 init_fl(sc, &rxq->fl, pi->qsize_rxq / 8, maxp, name); 1010 1011 if (pi->flags & INTR_RXQ) { 1012 rxq->iq.flags |= IQ_INTR; 1013 rc = alloc_rxq(pi, rxq, intr_idx, i, oid); 1014 if (rc != 0) 1015 goto done; 1016 intr_idx++; 1017 } 1018 } 1019 #ifdef TCP_OFFLOAD 1020 maxp = mtu_to_max_payload(sc, mtu, 1); 1021 if (is_offload(sc) && pi->flags & INTR_OFLD_RXQ) { 1022 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "ofld_rxq", 1023 CTLFLAG_RD, NULL, 1024 "rx queues for offloaded TCP connections"); 1025 } 1026 for_each_ofld_rxq(pi, i, ofld_rxq) { 1027 1028 init_iq(&ofld_rxq->iq, sc, pi->tmr_idx, pi->pktc_idx, 1029 pi->qsize_rxq); 1030 1031 snprintf(name, sizeof(name), "%s ofld_rxq%d-fl", 1032 device_get_nameunit(pi->dev), i); 1033 init_fl(sc, &ofld_rxq->fl, pi->qsize_rxq / 8, maxp, name); 1034 1035 if (pi->flags & INTR_OFLD_RXQ) { 1036 ofld_rxq->iq.flags |= IQ_INTR; 1037 rc = alloc_ofld_rxq(pi, ofld_rxq, intr_idx, i, oid); 1038 if (rc != 0) 1039 goto done; 1040 intr_idx++; 1041 } 1042 } 1043 #endif 1044 #ifdef DEV_NETMAP 1045 /* 1046 * We don't have buffers to back the netmap rx queues right now so we 1047 * create the queues in a way that doesn't set off any congestion signal 1048 * in the chip. 1049 */ 1050 if (pi->flags & INTR_NM_RXQ) { 1051 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "nm_rxq", 1052 CTLFLAG_RD, NULL, "rx queues for netmap"); 1053 for_each_nm_rxq(pi, i, nm_rxq) { 1054 rc = alloc_nm_rxq(pi, nm_rxq, intr_idx, i, oid); 1055 if (rc != 0) 1056 goto done; 1057 intr_idx++; 1058 } 1059 } 1060 #endif 1061 1062 /* 1063 * Second pass over all NIC and TOE rx queues. The queues forwarding 1064 * their interrupts are allocated now. 1065 */ 1066 j = 0; 1067 if (!(pi->flags & INTR_RXQ)) { 1068 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "rxq", 1069 CTLFLAG_RD, NULL, "rx queues"); 1070 for_each_rxq(pi, i, rxq) { 1071 MPASS(!(rxq->iq.flags & IQ_INTR)); 1072 1073 intr_idx = port_intr_iq(pi, j)->abs_id; 1074 1075 rc = alloc_rxq(pi, rxq, intr_idx, i, oid); 1076 if (rc != 0) 1077 goto done; 1078 j++; 1079 } 1080 } 1081 #ifdef TCP_OFFLOAD 1082 if (is_offload(sc) && !(pi->flags & INTR_OFLD_RXQ)) { 1083 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "ofld_rxq", 1084 CTLFLAG_RD, NULL, 1085 "rx queues for offloaded TCP connections"); 1086 for_each_ofld_rxq(pi, i, ofld_rxq) { 1087 MPASS(!(ofld_rxq->iq.flags & IQ_INTR)); 1088 1089 intr_idx = port_intr_iq(pi, j)->abs_id; 1090 1091 rc = alloc_ofld_rxq(pi, ofld_rxq, intr_idx, i, oid); 1092 if (rc != 0) 1093 goto done; 1094 j++; 1095 } 1096 } 1097 #endif 1098 #ifdef DEV_NETMAP 1099 if (!(pi->flags & INTR_NM_RXQ)) 1100 CXGBE_UNIMPLEMENTED(__func__); 1101 #endif 1102 1103 /* 1104 * Now the tx queues. Only one pass needed. 1105 */ 1106 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "txq", CTLFLAG_RD, 1107 NULL, "tx queues"); 1108 j = 0; 1109 for_each_txq(pi, i, txq) { 1110 iqid = port_intr_iq(pi, j)->cntxt_id; 1111 snprintf(name, sizeof(name), "%s txq%d", 1112 device_get_nameunit(pi->dev), i); 1113 init_eq(&txq->eq, EQ_ETH, pi->qsize_txq, pi->tx_chan, iqid, 1114 name); 1115 1116 rc = alloc_txq(pi, txq, i, oid); 1117 if (rc != 0) 1118 goto done; 1119 j++; 1120 } 1121 #ifdef TCP_OFFLOAD 1122 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "ofld_txq", 1123 CTLFLAG_RD, NULL, "tx queues for offloaded TCP connections"); 1124 for_each_ofld_txq(pi, i, ofld_txq) { 1125 struct sysctl_oid *oid2; 1126 1127 iqid = port_intr_iq(pi, j)->cntxt_id; 1128 snprintf(name, sizeof(name), "%s ofld_txq%d", 1129 device_get_nameunit(pi->dev), i); 1130 init_eq(&ofld_txq->eq, EQ_OFLD, pi->qsize_txq, pi->tx_chan, 1131 iqid, name); 1132 1133 snprintf(name, sizeof(name), "%d", i); 1134 oid2 = SYSCTL_ADD_NODE(&pi->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 1135 name, CTLFLAG_RD, NULL, "offload tx queue"); 1136 1137 rc = alloc_wrq(sc, pi, ofld_txq, oid2); 1138 if (rc != 0) 1139 goto done; 1140 j++; 1141 } 1142 #endif 1143 #ifdef DEV_NETMAP 1144 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "nm_txq", 1145 CTLFLAG_RD, NULL, "tx queues for netmap use"); 1146 for_each_nm_txq(pi, i, nm_txq) { 1147 iqid = pi->first_nm_rxq + (j % pi->nnmrxq); 1148 rc = alloc_nm_txq(pi, nm_txq, iqid, i, oid); 1149 if (rc != 0) 1150 goto done; 1151 j++; 1152 } 1153 #endif 1154 1155 /* 1156 * Finally, the control queue. 1157 */ 1158 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "ctrlq", CTLFLAG_RD, 1159 NULL, "ctrl queue"); 1160 ctrlq = &sc->sge.ctrlq[pi->port_id]; 1161 iqid = port_intr_iq(pi, 0)->cntxt_id; 1162 snprintf(name, sizeof(name), "%s ctrlq", device_get_nameunit(pi->dev)); 1163 init_eq(&ctrlq->eq, EQ_CTRL, CTRL_EQ_QSIZE, pi->tx_chan, iqid, name); 1164 rc = alloc_wrq(sc, pi, ctrlq, oid); 1165 1166 done: 1167 if (rc) 1168 t4_teardown_port_queues(pi); 1169 1170 return (rc); 1171 } 1172 1173 /* 1174 * Idempotent 1175 */ 1176 int 1177 t4_teardown_port_queues(struct port_info *pi) 1178 { 1179 int i; 1180 struct adapter *sc = pi->adapter; 1181 struct sge_rxq *rxq; 1182 struct sge_txq *txq; 1183 #ifdef TCP_OFFLOAD 1184 struct sge_ofld_rxq *ofld_rxq; 1185 struct sge_wrq *ofld_txq; 1186 #endif 1187 #ifdef DEV_NETMAP 1188 struct sge_nm_rxq *nm_rxq; 1189 struct sge_nm_txq *nm_txq; 1190 #endif 1191 1192 /* Do this before freeing the queues */ 1193 if (pi->flags & PORT_SYSCTL_CTX) { 1194 sysctl_ctx_free(&pi->ctx); 1195 pi->flags &= ~PORT_SYSCTL_CTX; 1196 } 1197 1198 /* 1199 * Take down all the tx queues first, as they reference the rx queues 1200 * (for egress updates, etc.). 1201 */ 1202 1203 free_wrq(sc, &sc->sge.ctrlq[pi->port_id]); 1204 1205 for_each_txq(pi, i, txq) { 1206 free_txq(pi, txq); 1207 } 1208 #ifdef TCP_OFFLOAD 1209 for_each_ofld_txq(pi, i, ofld_txq) { 1210 free_wrq(sc, ofld_txq); 1211 } 1212 #endif 1213 #ifdef DEV_NETMAP 1214 for_each_nm_txq(pi, i, nm_txq) 1215 free_nm_txq(pi, nm_txq); 1216 #endif 1217 1218 /* 1219 * Then take down the rx queues that forward their interrupts, as they 1220 * reference other rx queues. 1221 */ 1222 1223 for_each_rxq(pi, i, rxq) { 1224 if ((rxq->iq.flags & IQ_INTR) == 0) 1225 free_rxq(pi, rxq); 1226 } 1227 #ifdef TCP_OFFLOAD 1228 for_each_ofld_rxq(pi, i, ofld_rxq) { 1229 if ((ofld_rxq->iq.flags & IQ_INTR) == 0) 1230 free_ofld_rxq(pi, ofld_rxq); 1231 } 1232 #endif 1233 #ifdef DEV_NETMAP 1234 for_each_nm_rxq(pi, i, nm_rxq) 1235 free_nm_rxq(pi, nm_rxq); 1236 #endif 1237 1238 /* 1239 * Then take down the rx queues that take direct interrupts. 1240 */ 1241 1242 for_each_rxq(pi, i, rxq) { 1243 if (rxq->iq.flags & IQ_INTR) 1244 free_rxq(pi, rxq); 1245 } 1246 #ifdef TCP_OFFLOAD 1247 for_each_ofld_rxq(pi, i, ofld_rxq) { 1248 if (ofld_rxq->iq.flags & IQ_INTR) 1249 free_ofld_rxq(pi, ofld_rxq); 1250 } 1251 #endif 1252 1253 return (0); 1254 } 1255 1256 /* 1257 * Deals with errors and the firmware event queue. All data rx queues forward 1258 * their interrupt to the firmware event queue. 1259 */ 1260 void 1261 t4_intr_all(void *arg) 1262 { 1263 struct adapter *sc = arg; 1264 struct sge_iq *fwq = &sc->sge.fwq; 1265 1266 t4_intr_err(arg); 1267 if (atomic_cmpset_int(&fwq->state, IQS_IDLE, IQS_BUSY)) { 1268 service_iq(fwq, 0); 1269 atomic_cmpset_int(&fwq->state, IQS_BUSY, IQS_IDLE); 1270 } 1271 } 1272 1273 /* Deals with error interrupts */ 1274 void 1275 t4_intr_err(void *arg) 1276 { 1277 struct adapter *sc = arg; 1278 1279 t4_write_reg(sc, MYPF_REG(A_PCIE_PF_CLI), 0); 1280 t4_slow_intr_handler(sc); 1281 } 1282 1283 void 1284 t4_intr_evt(void *arg) 1285 { 1286 struct sge_iq *iq = arg; 1287 1288 if (atomic_cmpset_int(&iq->state, IQS_IDLE, IQS_BUSY)) { 1289 service_iq(iq, 0); 1290 atomic_cmpset_int(&iq->state, IQS_BUSY, IQS_IDLE); 1291 } 1292 } 1293 1294 void 1295 t4_intr(void *arg) 1296 { 1297 struct sge_iq *iq = arg; 1298 1299 if (atomic_cmpset_int(&iq->state, IQS_IDLE, IQS_BUSY)) { 1300 service_iq(iq, 0); 1301 atomic_cmpset_int(&iq->state, IQS_BUSY, IQS_IDLE); 1302 } 1303 } 1304 1305 /* 1306 * Deals with anything and everything on the given ingress queue. 1307 */ 1308 static int 1309 service_iq(struct sge_iq *iq, int budget) 1310 { 1311 struct sge_iq *q; 1312 struct sge_rxq *rxq = iq_to_rxq(iq); /* Use iff iq is part of rxq */ 1313 struct sge_fl *fl; /* Use iff IQ_HAS_FL */ 1314 struct adapter *sc = iq->adapter; 1315 struct iq_desc *d = &iq->desc[iq->cidx]; 1316 int ndescs = 0, limit; 1317 int rsp_type, refill; 1318 uint32_t lq; 1319 uint16_t fl_hw_cidx; 1320 struct mbuf *m0; 1321 STAILQ_HEAD(, sge_iq) iql = STAILQ_HEAD_INITIALIZER(iql); 1322 #if defined(INET) || defined(INET6) 1323 const struct timeval lro_timeout = {0, sc->lro_timeout}; 1324 #endif 1325 1326 KASSERT(iq->state == IQS_BUSY, ("%s: iq %p not BUSY", __func__, iq)); 1327 1328 limit = budget ? budget : iq->qsize / 16; 1329 1330 if (iq->flags & IQ_HAS_FL) { 1331 fl = &rxq->fl; 1332 fl_hw_cidx = fl->hw_cidx; /* stable snapshot */ 1333 } else { 1334 fl = NULL; 1335 fl_hw_cidx = 0; /* to silence gcc warning */ 1336 } 1337 1338 /* 1339 * We always come back and check the descriptor ring for new indirect 1340 * interrupts and other responses after running a single handler. 1341 */ 1342 for (;;) { 1343 while ((d->rsp.u.type_gen & F_RSPD_GEN) == iq->gen) { 1344 1345 rmb(); 1346 1347 refill = 0; 1348 m0 = NULL; 1349 rsp_type = G_RSPD_TYPE(d->rsp.u.type_gen); 1350 lq = be32toh(d->rsp.pldbuflen_qid); 1351 1352 switch (rsp_type) { 1353 case X_RSPD_TYPE_FLBUF: 1354 1355 KASSERT(iq->flags & IQ_HAS_FL, 1356 ("%s: data for an iq (%p) with no freelist", 1357 __func__, iq)); 1358 1359 m0 = get_fl_payload(sc, fl, lq); 1360 if (__predict_false(m0 == NULL)) 1361 goto process_iql; 1362 refill = IDXDIFF(fl->hw_cidx, fl_hw_cidx, fl->sidx) > 2; 1363 #ifdef T4_PKT_TIMESTAMP 1364 /* 1365 * 60 bit timestamp for the payload is 1366 * *(uint64_t *)m0->m_pktdat. Note that it is 1367 * in the leading free-space in the mbuf. The 1368 * kernel can clobber it during a pullup, 1369 * m_copymdata, etc. You need to make sure that 1370 * the mbuf reaches you unmolested if you care 1371 * about the timestamp. 1372 */ 1373 *(uint64_t *)m0->m_pktdat = 1374 be64toh(ctrl->u.last_flit) & 1375 0xfffffffffffffff; 1376 #endif 1377 1378 /* fall through */ 1379 1380 case X_RSPD_TYPE_CPL: 1381 KASSERT(d->rss.opcode < NUM_CPL_CMDS, 1382 ("%s: bad opcode %02x.", __func__, 1383 d->rss.opcode)); 1384 sc->cpl_handler[d->rss.opcode](iq, &d->rss, m0); 1385 break; 1386 1387 case X_RSPD_TYPE_INTR: 1388 1389 /* 1390 * Interrupts should be forwarded only to queues 1391 * that are not forwarding their interrupts. 1392 * This means service_iq can recurse but only 1 1393 * level deep. 1394 */ 1395 KASSERT(budget == 0, 1396 ("%s: budget %u, rsp_type %u", __func__, 1397 budget, rsp_type)); 1398 1399 /* 1400 * There are 1K interrupt-capable queues (qids 0 1401 * through 1023). A response type indicating a 1402 * forwarded interrupt with a qid >= 1K is an 1403 * iWARP async notification. 1404 */ 1405 if (lq >= 1024) { 1406 sc->an_handler(iq, &d->rsp); 1407 break; 1408 } 1409 1410 q = sc->sge.iqmap[lq - sc->sge.iq_start]; 1411 if (atomic_cmpset_int(&q->state, IQS_IDLE, 1412 IQS_BUSY)) { 1413 if (service_iq(q, q->qsize / 16) == 0) { 1414 atomic_cmpset_int(&q->state, 1415 IQS_BUSY, IQS_IDLE); 1416 } else { 1417 STAILQ_INSERT_TAIL(&iql, q, 1418 link); 1419 } 1420 } 1421 break; 1422 1423 default: 1424 KASSERT(0, 1425 ("%s: illegal response type %d on iq %p", 1426 __func__, rsp_type, iq)); 1427 log(LOG_ERR, 1428 "%s: illegal response type %d on iq %p", 1429 device_get_nameunit(sc->dev), rsp_type, iq); 1430 break; 1431 } 1432 1433 d++; 1434 if (__predict_false(++iq->cidx == iq->sidx)) { 1435 iq->cidx = 0; 1436 iq->gen ^= F_RSPD_GEN; 1437 d = &iq->desc[0]; 1438 } 1439 if (__predict_false(++ndescs == limit)) { 1440 t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS), 1441 V_CIDXINC(ndescs) | 1442 V_INGRESSQID(iq->cntxt_id) | 1443 V_SEINTARM(V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX))); 1444 ndescs = 0; 1445 1446 #if defined(INET) || defined(INET6) 1447 if (iq->flags & IQ_LRO_ENABLED && 1448 sc->lro_timeout != 0) { 1449 tcp_lro_flush_inactive(&rxq->lro, 1450 &lro_timeout); 1451 } 1452 #endif 1453 1454 if (budget) { 1455 if (iq->flags & IQ_HAS_FL) { 1456 FL_LOCK(fl); 1457 refill_fl(sc, fl, 32); 1458 FL_UNLOCK(fl); 1459 } 1460 return (EINPROGRESS); 1461 } 1462 } 1463 if (refill) { 1464 FL_LOCK(fl); 1465 refill_fl(sc, fl, 32); 1466 FL_UNLOCK(fl); 1467 fl_hw_cidx = fl->hw_cidx; 1468 } 1469 } 1470 1471 process_iql: 1472 if (STAILQ_EMPTY(&iql)) 1473 break; 1474 1475 /* 1476 * Process the head only, and send it to the back of the list if 1477 * it's still not done. 1478 */ 1479 q = STAILQ_FIRST(&iql); 1480 STAILQ_REMOVE_HEAD(&iql, link); 1481 if (service_iq(q, q->qsize / 8) == 0) 1482 atomic_cmpset_int(&q->state, IQS_BUSY, IQS_IDLE); 1483 else 1484 STAILQ_INSERT_TAIL(&iql, q, link); 1485 } 1486 1487 #if defined(INET) || defined(INET6) 1488 if (iq->flags & IQ_LRO_ENABLED) { 1489 struct lro_ctrl *lro = &rxq->lro; 1490 struct lro_entry *l; 1491 1492 while (!SLIST_EMPTY(&lro->lro_active)) { 1493 l = SLIST_FIRST(&lro->lro_active); 1494 SLIST_REMOVE_HEAD(&lro->lro_active, next); 1495 tcp_lro_flush(lro, l); 1496 } 1497 } 1498 #endif 1499 1500 t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS), V_CIDXINC(ndescs) | 1501 V_INGRESSQID((u32)iq->cntxt_id) | V_SEINTARM(iq->intr_params)); 1502 1503 if (iq->flags & IQ_HAS_FL) { 1504 int starved; 1505 1506 FL_LOCK(fl); 1507 starved = refill_fl(sc, fl, 64); 1508 FL_UNLOCK(fl); 1509 if (__predict_false(starved != 0)) 1510 add_fl_to_sfl(sc, fl); 1511 } 1512 1513 return (0); 1514 } 1515 1516 static inline int 1517 cl_has_metadata(struct sge_fl *fl, struct cluster_layout *cll) 1518 { 1519 int rc = fl->flags & FL_BUF_PACKING || cll->region1 > 0; 1520 1521 if (rc) 1522 MPASS(cll->region3 >= CL_METADATA_SIZE); 1523 1524 return (rc); 1525 } 1526 1527 static inline struct cluster_metadata * 1528 cl_metadata(struct adapter *sc, struct sge_fl *fl, struct cluster_layout *cll, 1529 caddr_t cl) 1530 { 1531 1532 if (cl_has_metadata(fl, cll)) { 1533 struct sw_zone_info *swz = &sc->sge.sw_zone_info[cll->zidx]; 1534 1535 return ((struct cluster_metadata *)(cl + swz->size) - 1); 1536 } 1537 return (NULL); 1538 } 1539 1540 static void 1541 rxb_free(struct mbuf *m, void *arg1, void *arg2) 1542 { 1543 uma_zone_t zone = arg1; 1544 caddr_t cl = arg2; 1545 1546 uma_zfree(zone, cl); 1547 counter_u64_add(extfree_rels, 1); 1548 } 1549 1550 /* 1551 * The mbuf returned by this function could be allocated from zone_mbuf or 1552 * constructed in spare room in the cluster. 1553 * 1554 * The mbuf carries the payload in one of these ways 1555 * a) frame inside the mbuf (mbuf from zone_mbuf) 1556 * b) m_cljset (for clusters without metadata) zone_mbuf 1557 * c) m_extaddref (cluster with metadata) inline mbuf 1558 * d) m_extaddref (cluster with metadata) zone_mbuf 1559 */ 1560 static struct mbuf * 1561 get_scatter_segment(struct adapter *sc, struct sge_fl *fl, int fr_offset, 1562 int remaining) 1563 { 1564 struct mbuf *m; 1565 struct fl_sdesc *sd = &fl->sdesc[fl->cidx]; 1566 struct cluster_layout *cll = &sd->cll; 1567 struct sw_zone_info *swz = &sc->sge.sw_zone_info[cll->zidx]; 1568 struct hw_buf_info *hwb = &sc->sge.hw_buf_info[cll->hwidx]; 1569 struct cluster_metadata *clm = cl_metadata(sc, fl, cll, sd->cl); 1570 int len, blen; 1571 caddr_t payload; 1572 1573 blen = hwb->size - fl->rx_offset; /* max possible in this buf */ 1574 len = min(remaining, blen); 1575 payload = sd->cl + cll->region1 + fl->rx_offset; 1576 if (fl->flags & FL_BUF_PACKING) { 1577 const u_int l = fr_offset + len; 1578 const u_int pad = roundup2(l, fl->buf_boundary) - l; 1579 1580 if (fl->rx_offset + len + pad < hwb->size) 1581 blen = len + pad; 1582 MPASS(fl->rx_offset + blen <= hwb->size); 1583 } else { 1584 MPASS(fl->rx_offset == 0); /* not packing */ 1585 } 1586 1587 1588 if (sc->sc_do_rxcopy && len < RX_COPY_THRESHOLD) { 1589 1590 /* 1591 * Copy payload into a freshly allocated mbuf. 1592 */ 1593 1594 m = fr_offset == 0 ? 1595 m_gethdr(M_NOWAIT, MT_DATA) : m_get(M_NOWAIT, MT_DATA); 1596 if (m == NULL) 1597 return (NULL); 1598 fl->mbuf_allocated++; 1599 #ifdef T4_PKT_TIMESTAMP 1600 /* Leave room for a timestamp */ 1601 m->m_data += 8; 1602 #endif 1603 /* copy data to mbuf */ 1604 bcopy(payload, mtod(m, caddr_t), len); 1605 1606 } else if (sd->nmbuf * MSIZE < cll->region1) { 1607 1608 /* 1609 * There's spare room in the cluster for an mbuf. Create one 1610 * and associate it with the payload that's in the cluster. 1611 */ 1612 1613 MPASS(clm != NULL); 1614 m = (struct mbuf *)(sd->cl + sd->nmbuf * MSIZE); 1615 /* No bzero required */ 1616 if (m_init(m, NULL, 0, M_NOWAIT, MT_DATA, 1617 fr_offset == 0 ? M_PKTHDR | M_NOFREE : M_NOFREE)) 1618 return (NULL); 1619 fl->mbuf_inlined++; 1620 m_extaddref(m, payload, blen, &clm->refcount, rxb_free, 1621 swz->zone, sd->cl); 1622 if (sd->nmbuf++ == 0) 1623 counter_u64_add(extfree_refs, 1); 1624 1625 } else { 1626 1627 /* 1628 * Grab an mbuf from zone_mbuf and associate it with the 1629 * payload in the cluster. 1630 */ 1631 1632 m = fr_offset == 0 ? 1633 m_gethdr(M_NOWAIT, MT_DATA) : m_get(M_NOWAIT, MT_DATA); 1634 if (m == NULL) 1635 return (NULL); 1636 fl->mbuf_allocated++; 1637 if (clm != NULL) { 1638 m_extaddref(m, payload, blen, &clm->refcount, 1639 rxb_free, swz->zone, sd->cl); 1640 if (sd->nmbuf++ == 0) 1641 counter_u64_add(extfree_refs, 1); 1642 } else { 1643 m_cljset(m, sd->cl, swz->type); 1644 sd->cl = NULL; /* consumed, not a recycle candidate */ 1645 } 1646 } 1647 if (fr_offset == 0) 1648 m->m_pkthdr.len = remaining; 1649 m->m_len = len; 1650 1651 if (fl->flags & FL_BUF_PACKING) { 1652 fl->rx_offset += blen; 1653 MPASS(fl->rx_offset <= hwb->size); 1654 if (fl->rx_offset < hwb->size) 1655 return (m); /* without advancing the cidx */ 1656 } 1657 1658 if (__predict_false(++fl->cidx % 8 == 0)) { 1659 uint16_t cidx = fl->cidx / 8; 1660 1661 if (__predict_false(cidx == fl->sidx)) 1662 fl->cidx = cidx = 0; 1663 fl->hw_cidx = cidx; 1664 } 1665 fl->rx_offset = 0; 1666 1667 return (m); 1668 } 1669 1670 static struct mbuf * 1671 get_fl_payload(struct adapter *sc, struct sge_fl *fl, uint32_t len_newbuf) 1672 { 1673 struct mbuf *m0, *m, **pnext; 1674 u_int remaining; 1675 const u_int total = G_RSPD_LEN(len_newbuf); 1676 1677 if (__predict_false(fl->flags & FL_BUF_RESUME)) { 1678 M_ASSERTPKTHDR(fl->m0); 1679 MPASS(fl->m0->m_pkthdr.len == total); 1680 MPASS(fl->remaining < total); 1681 1682 m0 = fl->m0; 1683 pnext = fl->pnext; 1684 remaining = fl->remaining; 1685 fl->flags &= ~FL_BUF_RESUME; 1686 goto get_segment; 1687 } 1688 1689 if (fl->rx_offset > 0 && len_newbuf & F_RSPD_NEWBUF) { 1690 fl->rx_offset = 0; 1691 if (__predict_false(++fl->cidx % 8 == 0)) { 1692 uint16_t cidx = fl->cidx / 8; 1693 1694 if (__predict_false(cidx == fl->sidx)) 1695 fl->cidx = cidx = 0; 1696 fl->hw_cidx = cidx; 1697 } 1698 } 1699 1700 /* 1701 * Payload starts at rx_offset in the current hw buffer. Its length is 1702 * 'len' and it may span multiple hw buffers. 1703 */ 1704 1705 m0 = get_scatter_segment(sc, fl, 0, total); 1706 if (m0 == NULL) 1707 return (NULL); 1708 remaining = total - m0->m_len; 1709 pnext = &m0->m_next; 1710 while (remaining > 0) { 1711 get_segment: 1712 MPASS(fl->rx_offset == 0); 1713 m = get_scatter_segment(sc, fl, total - remaining, remaining); 1714 if (__predict_false(m == NULL)) { 1715 fl->m0 = m0; 1716 fl->pnext = pnext; 1717 fl->remaining = remaining; 1718 fl->flags |= FL_BUF_RESUME; 1719 return (NULL); 1720 } 1721 *pnext = m; 1722 pnext = &m->m_next; 1723 remaining -= m->m_len; 1724 } 1725 *pnext = NULL; 1726 1727 return (m0); 1728 } 1729 1730 static int 1731 t4_eth_rx(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m0) 1732 { 1733 struct sge_rxq *rxq = iq_to_rxq(iq); 1734 struct ifnet *ifp = rxq->ifp; 1735 const struct cpl_rx_pkt *cpl = (const void *)(rss + 1); 1736 #if defined(INET) || defined(INET6) 1737 struct lro_ctrl *lro = &rxq->lro; 1738 #endif 1739 1740 KASSERT(m0 != NULL, ("%s: no payload with opcode %02x", __func__, 1741 rss->opcode)); 1742 1743 m0->m_pkthdr.len -= fl_pktshift; 1744 m0->m_len -= fl_pktshift; 1745 m0->m_data += fl_pktshift; 1746 1747 m0->m_pkthdr.rcvif = ifp; 1748 M_HASHTYPE_SET(m0, M_HASHTYPE_OPAQUE); 1749 m0->m_pkthdr.flowid = be32toh(rss->hash_val); 1750 1751 if (cpl->csum_calc && !cpl->err_vec) { 1752 if (ifp->if_capenable & IFCAP_RXCSUM && 1753 cpl->l2info & htobe32(F_RXF_IP)) { 1754 m0->m_pkthdr.csum_flags = (CSUM_IP_CHECKED | 1755 CSUM_IP_VALID | CSUM_DATA_VALID | CSUM_PSEUDO_HDR); 1756 rxq->rxcsum++; 1757 } else if (ifp->if_capenable & IFCAP_RXCSUM_IPV6 && 1758 cpl->l2info & htobe32(F_RXF_IP6)) { 1759 m0->m_pkthdr.csum_flags = (CSUM_DATA_VALID_IPV6 | 1760 CSUM_PSEUDO_HDR); 1761 rxq->rxcsum++; 1762 } 1763 1764 if (__predict_false(cpl->ip_frag)) 1765 m0->m_pkthdr.csum_data = be16toh(cpl->csum); 1766 else 1767 m0->m_pkthdr.csum_data = 0xffff; 1768 } 1769 1770 if (cpl->vlan_ex) { 1771 m0->m_pkthdr.ether_vtag = be16toh(cpl->vlan); 1772 m0->m_flags |= M_VLANTAG; 1773 rxq->vlan_extraction++; 1774 } 1775 1776 #if defined(INET) || defined(INET6) 1777 if (cpl->l2info & htobe32(F_RXF_LRO) && 1778 iq->flags & IQ_LRO_ENABLED && 1779 tcp_lro_rx(lro, m0, 0) == 0) { 1780 /* queued for LRO */ 1781 } else 1782 #endif 1783 ifp->if_input(ifp, m0); 1784 1785 return (0); 1786 } 1787 1788 /* 1789 * Must drain the wrq or make sure that someone else will. 1790 */ 1791 static void 1792 wrq_tx_drain(void *arg, int n) 1793 { 1794 struct sge_wrq *wrq = arg; 1795 struct sge_eq *eq = &wrq->eq; 1796 1797 EQ_LOCK(eq); 1798 if (TAILQ_EMPTY(&wrq->incomplete_wrs) && !STAILQ_EMPTY(&wrq->wr_list)) 1799 drain_wrq_wr_list(wrq->adapter, wrq); 1800 EQ_UNLOCK(eq); 1801 } 1802 1803 static void 1804 drain_wrq_wr_list(struct adapter *sc, struct sge_wrq *wrq) 1805 { 1806 struct sge_eq *eq = &wrq->eq; 1807 u_int available, dbdiff; /* # of hardware descriptors */ 1808 u_int n; 1809 struct wrqe *wr; 1810 struct fw_eth_tx_pkt_wr *dst; /* any fw WR struct will do */ 1811 1812 EQ_LOCK_ASSERT_OWNED(eq); 1813 MPASS(TAILQ_EMPTY(&wrq->incomplete_wrs)); 1814 wr = STAILQ_FIRST(&wrq->wr_list); 1815 MPASS(wr != NULL); /* Must be called with something useful to do */ 1816 dbdiff = IDXDIFF(eq->pidx, eq->dbidx, eq->sidx); 1817 1818 do { 1819 eq->cidx = read_hw_cidx(eq); 1820 if (eq->pidx == eq->cidx) 1821 available = eq->sidx - 1; 1822 else 1823 available = IDXDIFF(eq->cidx, eq->pidx, eq->sidx) - 1; 1824 1825 MPASS(wr->wrq == wrq); 1826 n = howmany(wr->wr_len, EQ_ESIZE); 1827 if (available < n) 1828 return; 1829 1830 dst = (void *)&eq->desc[eq->pidx]; 1831 if (__predict_true(eq->sidx - eq->pidx > n)) { 1832 /* Won't wrap, won't end exactly at the status page. */ 1833 bcopy(&wr->wr[0], dst, wr->wr_len); 1834 eq->pidx += n; 1835 } else { 1836 int first_portion = (eq->sidx - eq->pidx) * EQ_ESIZE; 1837 1838 bcopy(&wr->wr[0], dst, first_portion); 1839 if (wr->wr_len > first_portion) { 1840 bcopy(&wr->wr[first_portion], &eq->desc[0], 1841 wr->wr_len - first_portion); 1842 } 1843 eq->pidx = n - (eq->sidx - eq->pidx); 1844 } 1845 1846 if (available < eq->sidx / 4 && 1847 atomic_cmpset_int(&eq->equiq, 0, 1)) { 1848 dst->equiq_to_len16 |= htobe32(F_FW_WR_EQUIQ | 1849 F_FW_WR_EQUEQ); 1850 eq->equeqidx = eq->pidx; 1851 } else if (IDXDIFF(eq->pidx, eq->equeqidx, eq->sidx) >= 32) { 1852 dst->equiq_to_len16 |= htobe32(F_FW_WR_EQUEQ); 1853 eq->equeqidx = eq->pidx; 1854 } 1855 1856 dbdiff += n; 1857 if (dbdiff >= 16) { 1858 ring_eq_db(sc, eq, dbdiff); 1859 dbdiff = 0; 1860 } 1861 1862 STAILQ_REMOVE_HEAD(&wrq->wr_list, link); 1863 free_wrqe(wr); 1864 MPASS(wrq->nwr_pending > 0); 1865 wrq->nwr_pending--; 1866 MPASS(wrq->ndesc_needed >= n); 1867 wrq->ndesc_needed -= n; 1868 } while ((wr = STAILQ_FIRST(&wrq->wr_list)) != NULL); 1869 1870 if (dbdiff) 1871 ring_eq_db(sc, eq, dbdiff); 1872 } 1873 1874 /* 1875 * Doesn't fail. Holds on to work requests it can't send right away. 1876 */ 1877 void 1878 t4_wrq_tx_locked(struct adapter *sc, struct sge_wrq *wrq, struct wrqe *wr) 1879 { 1880 #ifdef INVARIANTS 1881 struct sge_eq *eq = &wrq->eq; 1882 #endif 1883 1884 EQ_LOCK_ASSERT_OWNED(eq); 1885 MPASS(wr != NULL); 1886 MPASS(wr->wr_len > 0 && wr->wr_len <= SGE_MAX_WR_LEN); 1887 MPASS((wr->wr_len & 0x7) == 0); 1888 1889 STAILQ_INSERT_TAIL(&wrq->wr_list, wr, link); 1890 wrq->nwr_pending++; 1891 wrq->ndesc_needed += howmany(wr->wr_len, EQ_ESIZE); 1892 1893 if (!TAILQ_EMPTY(&wrq->incomplete_wrs)) 1894 return; /* commit_wrq_wr will drain wr_list as well. */ 1895 1896 drain_wrq_wr_list(sc, wrq); 1897 1898 /* Doorbell must have caught up to the pidx. */ 1899 MPASS(eq->pidx == eq->dbidx); 1900 } 1901 1902 void 1903 t4_update_fl_bufsize(struct ifnet *ifp) 1904 { 1905 struct port_info *pi = ifp->if_softc; 1906 struct adapter *sc = pi->adapter; 1907 struct sge_rxq *rxq; 1908 #ifdef TCP_OFFLOAD 1909 struct sge_ofld_rxq *ofld_rxq; 1910 #endif 1911 struct sge_fl *fl; 1912 int i, maxp, mtu = ifp->if_mtu; 1913 1914 maxp = mtu_to_max_payload(sc, mtu, 0); 1915 for_each_rxq(pi, i, rxq) { 1916 fl = &rxq->fl; 1917 1918 FL_LOCK(fl); 1919 find_best_refill_source(sc, fl, maxp); 1920 FL_UNLOCK(fl); 1921 } 1922 #ifdef TCP_OFFLOAD 1923 maxp = mtu_to_max_payload(sc, mtu, 1); 1924 for_each_ofld_rxq(pi, i, ofld_rxq) { 1925 fl = &ofld_rxq->fl; 1926 1927 FL_LOCK(fl); 1928 find_best_refill_source(sc, fl, maxp); 1929 FL_UNLOCK(fl); 1930 } 1931 #endif 1932 } 1933 1934 static inline int 1935 mbuf_nsegs(struct mbuf *m) 1936 { 1937 1938 M_ASSERTPKTHDR(m); 1939 KASSERT(m->m_pkthdr.l5hlen > 0, 1940 ("%s: mbuf %p missing information on # of segments.", __func__, m)); 1941 1942 return (m->m_pkthdr.l5hlen); 1943 } 1944 1945 static inline void 1946 set_mbuf_nsegs(struct mbuf *m, uint8_t nsegs) 1947 { 1948 1949 M_ASSERTPKTHDR(m); 1950 m->m_pkthdr.l5hlen = nsegs; 1951 } 1952 1953 static inline int 1954 mbuf_len16(struct mbuf *m) 1955 { 1956 int n; 1957 1958 M_ASSERTPKTHDR(m); 1959 n = m->m_pkthdr.PH_loc.eight[0]; 1960 MPASS(n > 0 && n <= SGE_MAX_WR_LEN / 16); 1961 1962 return (n); 1963 } 1964 1965 static inline void 1966 set_mbuf_len16(struct mbuf *m, uint8_t len16) 1967 { 1968 1969 M_ASSERTPKTHDR(m); 1970 m->m_pkthdr.PH_loc.eight[0] = len16; 1971 } 1972 1973 static inline int 1974 needs_tso(struct mbuf *m) 1975 { 1976 1977 M_ASSERTPKTHDR(m); 1978 1979 if (m->m_pkthdr.csum_flags & CSUM_TSO) { 1980 KASSERT(m->m_pkthdr.tso_segsz > 0, 1981 ("%s: TSO requested in mbuf %p but MSS not provided", 1982 __func__, m)); 1983 return (1); 1984 } 1985 1986 return (0); 1987 } 1988 1989 static inline int 1990 needs_l3_csum(struct mbuf *m) 1991 { 1992 1993 M_ASSERTPKTHDR(m); 1994 1995 if (m->m_pkthdr.csum_flags & (CSUM_IP | CSUM_TSO)) 1996 return (1); 1997 return (0); 1998 } 1999 2000 static inline int 2001 needs_l4_csum(struct mbuf *m) 2002 { 2003 2004 M_ASSERTPKTHDR(m); 2005 2006 if (m->m_pkthdr.csum_flags & (CSUM_TCP | CSUM_UDP | CSUM_UDP_IPV6 | 2007 CSUM_TCP_IPV6 | CSUM_TSO)) 2008 return (1); 2009 return (0); 2010 } 2011 2012 static inline int 2013 needs_vlan_insertion(struct mbuf *m) 2014 { 2015 2016 M_ASSERTPKTHDR(m); 2017 2018 if (m->m_flags & M_VLANTAG) { 2019 KASSERT(m->m_pkthdr.ether_vtag != 0, 2020 ("%s: HWVLAN requested in mbuf %p but tag not provided", 2021 __func__, m)); 2022 return (1); 2023 } 2024 return (0); 2025 } 2026 2027 static void * 2028 m_advance(struct mbuf **pm, int *poffset, int len) 2029 { 2030 struct mbuf *m = *pm; 2031 int offset = *poffset; 2032 uintptr_t p = 0; 2033 2034 MPASS(len > 0); 2035 2036 while (len) { 2037 if (offset + len < m->m_len) { 2038 offset += len; 2039 p = mtod(m, uintptr_t) + offset; 2040 break; 2041 } 2042 len -= m->m_len - offset; 2043 m = m->m_next; 2044 offset = 0; 2045 MPASS(m != NULL); 2046 } 2047 *poffset = offset; 2048 *pm = m; 2049 return ((void *)p); 2050 } 2051 2052 static inline int 2053 same_paddr(char *a, char *b) 2054 { 2055 2056 if (a == b) 2057 return (1); 2058 else if (a != NULL && b != NULL) { 2059 vm_offset_t x = (vm_offset_t)a; 2060 vm_offset_t y = (vm_offset_t)b; 2061 2062 if ((x & PAGE_MASK) == (y & PAGE_MASK) && 2063 pmap_kextract(x) == pmap_kextract(y)) 2064 return (1); 2065 } 2066 2067 return (0); 2068 } 2069 2070 /* 2071 * Can deal with empty mbufs in the chain that have m_len = 0, but the chain 2072 * must have at least one mbuf that's not empty. 2073 */ 2074 static inline int 2075 count_mbuf_nsegs(struct mbuf *m) 2076 { 2077 char *prev_end, *start; 2078 int len, nsegs; 2079 2080 MPASS(m != NULL); 2081 2082 nsegs = 0; 2083 prev_end = NULL; 2084 for (; m; m = m->m_next) { 2085 2086 len = m->m_len; 2087 if (__predict_false(len == 0)) 2088 continue; 2089 start = mtod(m, char *); 2090 2091 nsegs += sglist_count(start, len); 2092 if (same_paddr(prev_end, start)) 2093 nsegs--; 2094 prev_end = start + len; 2095 } 2096 2097 MPASS(nsegs > 0); 2098 return (nsegs); 2099 } 2100 2101 /* 2102 * Analyze the mbuf to determine its tx needs. The mbuf passed in may change: 2103 * a) caller can assume it's been freed if this function returns with an error. 2104 * b) it may get defragged up if the gather list is too long for the hardware. 2105 */ 2106 int 2107 parse_pkt(struct mbuf **mp) 2108 { 2109 struct mbuf *m0 = *mp, *m; 2110 int rc, nsegs, defragged = 0, offset; 2111 struct ether_header *eh; 2112 void *l3hdr; 2113 #if defined(INET) || defined(INET6) 2114 struct tcphdr *tcp; 2115 #endif 2116 uint16_t eh_type; 2117 2118 M_ASSERTPKTHDR(m0); 2119 if (__predict_false(m0->m_pkthdr.len < ETHER_HDR_LEN)) { 2120 rc = EINVAL; 2121 fail: 2122 m_freem(m0); 2123 *mp = NULL; 2124 return (rc); 2125 } 2126 restart: 2127 /* 2128 * First count the number of gather list segments in the payload. 2129 * Defrag the mbuf if nsegs exceeds the hardware limit. 2130 */ 2131 M_ASSERTPKTHDR(m0); 2132 MPASS(m0->m_pkthdr.len > 0); 2133 nsegs = count_mbuf_nsegs(m0); 2134 if (nsegs > (needs_tso(m0) ? TX_SGL_SEGS_TSO : TX_SGL_SEGS)) { 2135 if (defragged++ > 0 || (m = m_defrag(m0, M_NOWAIT)) == NULL) { 2136 rc = EFBIG; 2137 goto fail; 2138 } 2139 *mp = m0 = m; /* update caller's copy after defrag */ 2140 goto restart; 2141 } 2142 2143 if (__predict_false(nsegs > 2 && m0->m_pkthdr.len <= MHLEN)) { 2144 m0 = m_pullup(m0, m0->m_pkthdr.len); 2145 if (m0 == NULL) { 2146 /* Should have left well enough alone. */ 2147 rc = EFBIG; 2148 goto fail; 2149 } 2150 *mp = m0; /* update caller's copy after pullup */ 2151 goto restart; 2152 } 2153 set_mbuf_nsegs(m0, nsegs); 2154 set_mbuf_len16(m0, txpkt_len16(nsegs, needs_tso(m0))); 2155 2156 if (!needs_tso(m0)) 2157 return (0); 2158 2159 m = m0; 2160 eh = mtod(m, struct ether_header *); 2161 eh_type = ntohs(eh->ether_type); 2162 if (eh_type == ETHERTYPE_VLAN) { 2163 struct ether_vlan_header *evh = (void *)eh; 2164 2165 eh_type = ntohs(evh->evl_proto); 2166 m0->m_pkthdr.l2hlen = sizeof(*evh); 2167 } else 2168 m0->m_pkthdr.l2hlen = sizeof(*eh); 2169 2170 offset = 0; 2171 l3hdr = m_advance(&m, &offset, m0->m_pkthdr.l2hlen); 2172 2173 switch (eh_type) { 2174 #ifdef INET6 2175 case ETHERTYPE_IPV6: 2176 { 2177 struct ip6_hdr *ip6 = l3hdr; 2178 2179 MPASS(ip6->ip6_nxt == IPPROTO_TCP); 2180 2181 m0->m_pkthdr.l3hlen = sizeof(*ip6); 2182 break; 2183 } 2184 #endif 2185 #ifdef INET 2186 case ETHERTYPE_IP: 2187 { 2188 struct ip *ip = l3hdr; 2189 2190 m0->m_pkthdr.l3hlen = ip->ip_hl * 4; 2191 break; 2192 } 2193 #endif 2194 default: 2195 panic("%s: ethertype 0x%04x unknown. if_cxgbe must be compiled" 2196 " with the same INET/INET6 options as the kernel.", 2197 __func__, eh_type); 2198 } 2199 2200 #if defined(INET) || defined(INET6) 2201 tcp = m_advance(&m, &offset, m0->m_pkthdr.l3hlen); 2202 m0->m_pkthdr.l4hlen = tcp->th_off * 4; 2203 #endif 2204 MPASS(m0 == *mp); 2205 return (0); 2206 } 2207 2208 void * 2209 start_wrq_wr(struct sge_wrq *wrq, int len16, struct wrq_cookie *cookie) 2210 { 2211 struct sge_eq *eq = &wrq->eq; 2212 struct adapter *sc = wrq->adapter; 2213 int ndesc, available; 2214 struct wrqe *wr; 2215 void *w; 2216 2217 MPASS(len16 > 0); 2218 ndesc = howmany(len16, EQ_ESIZE / 16); 2219 MPASS(ndesc > 0 && ndesc <= SGE_MAX_WR_NDESC); 2220 2221 EQ_LOCK(eq); 2222 2223 if (!STAILQ_EMPTY(&wrq->wr_list)) 2224 drain_wrq_wr_list(sc, wrq); 2225 2226 if (!STAILQ_EMPTY(&wrq->wr_list)) { 2227 slowpath: 2228 EQ_UNLOCK(eq); 2229 wr = alloc_wrqe(len16 * 16, wrq); 2230 if (__predict_false(wr == NULL)) 2231 return (NULL); 2232 cookie->pidx = -1; 2233 cookie->ndesc = ndesc; 2234 return (&wr->wr); 2235 } 2236 2237 eq->cidx = read_hw_cidx(eq); 2238 if (eq->pidx == eq->cidx) 2239 available = eq->sidx - 1; 2240 else 2241 available = IDXDIFF(eq->cidx, eq->pidx, eq->sidx) - 1; 2242 if (available < ndesc) 2243 goto slowpath; 2244 2245 cookie->pidx = eq->pidx; 2246 cookie->ndesc = ndesc; 2247 TAILQ_INSERT_TAIL(&wrq->incomplete_wrs, cookie, link); 2248 2249 w = &eq->desc[eq->pidx]; 2250 IDXINCR(eq->pidx, ndesc, eq->sidx); 2251 if (__predict_false(eq->pidx < ndesc - 1)) { 2252 w = &wrq->ss[0]; 2253 wrq->ss_pidx = cookie->pidx; 2254 wrq->ss_len = len16 * 16; 2255 } 2256 2257 EQ_UNLOCK(eq); 2258 2259 return (w); 2260 } 2261 2262 void 2263 commit_wrq_wr(struct sge_wrq *wrq, void *w, struct wrq_cookie *cookie) 2264 { 2265 struct sge_eq *eq = &wrq->eq; 2266 struct adapter *sc = wrq->adapter; 2267 int ndesc, pidx; 2268 struct wrq_cookie *prev, *next; 2269 2270 if (cookie->pidx == -1) { 2271 struct wrqe *wr = __containerof(w, struct wrqe, wr); 2272 2273 t4_wrq_tx(sc, wr); 2274 return; 2275 } 2276 2277 ndesc = cookie->ndesc; /* Can be more than SGE_MAX_WR_NDESC here. */ 2278 pidx = cookie->pidx; 2279 MPASS(pidx >= 0 && pidx < eq->sidx); 2280 if (__predict_false(w == &wrq->ss[0])) { 2281 int n = (eq->sidx - wrq->ss_pidx) * EQ_ESIZE; 2282 2283 MPASS(wrq->ss_len > n); /* WR had better wrap around. */ 2284 bcopy(&wrq->ss[0], &eq->desc[wrq->ss_pidx], n); 2285 bcopy(&wrq->ss[n], &eq->desc[0], wrq->ss_len - n); 2286 wrq->tx_wrs_ss++; 2287 } else 2288 wrq->tx_wrs_direct++; 2289 2290 EQ_LOCK(eq); 2291 prev = TAILQ_PREV(cookie, wrq_incomplete_wrs, link); 2292 next = TAILQ_NEXT(cookie, link); 2293 if (prev == NULL) { 2294 MPASS(pidx == eq->dbidx); 2295 if (next == NULL || ndesc >= 16) 2296 ring_eq_db(wrq->adapter, eq, ndesc); 2297 else { 2298 MPASS(IDXDIFF(next->pidx, pidx, eq->sidx) == ndesc); 2299 next->pidx = pidx; 2300 next->ndesc += ndesc; 2301 } 2302 } else { 2303 MPASS(IDXDIFF(pidx, prev->pidx, eq->sidx) == prev->ndesc); 2304 prev->ndesc += ndesc; 2305 } 2306 TAILQ_REMOVE(&wrq->incomplete_wrs, cookie, link); 2307 2308 if (TAILQ_EMPTY(&wrq->incomplete_wrs) && !STAILQ_EMPTY(&wrq->wr_list)) 2309 drain_wrq_wr_list(sc, wrq); 2310 2311 #ifdef INVARIANTS 2312 if (TAILQ_EMPTY(&wrq->incomplete_wrs)) { 2313 /* Doorbell must have caught up to the pidx. */ 2314 MPASS(wrq->eq.pidx == wrq->eq.dbidx); 2315 } 2316 #endif 2317 EQ_UNLOCK(eq); 2318 } 2319 2320 static u_int 2321 can_resume_eth_tx(struct mp_ring *r) 2322 { 2323 struct sge_eq *eq = r->cookie; 2324 2325 return (total_available_tx_desc(eq) > eq->sidx / 8); 2326 } 2327 2328 static inline int 2329 cannot_use_txpkts(struct mbuf *m) 2330 { 2331 /* maybe put a GL limit too, to avoid silliness? */ 2332 2333 return (needs_tso(m)); 2334 } 2335 2336 /* 2337 * r->items[cidx] to r->items[pidx], with a wraparound at r->size, are ready to 2338 * be consumed. Return the actual number consumed. 0 indicates a stall. 2339 */ 2340 static u_int 2341 eth_tx(struct mp_ring *r, u_int cidx, u_int pidx) 2342 { 2343 struct sge_txq *txq = r->cookie; 2344 struct sge_eq *eq = &txq->eq; 2345 struct ifnet *ifp = txq->ifp; 2346 struct port_info *pi = (void *)ifp->if_softc; 2347 struct adapter *sc = pi->adapter; 2348 u_int total, remaining; /* # of packets */ 2349 u_int available, dbdiff; /* # of hardware descriptors */ 2350 u_int n, next_cidx; 2351 struct mbuf *m0, *tail; 2352 struct txpkts txp; 2353 struct fw_eth_tx_pkts_wr *wr; /* any fw WR struct will do */ 2354 2355 remaining = IDXDIFF(pidx, cidx, r->size); 2356 MPASS(remaining > 0); /* Must not be called without work to do. */ 2357 total = 0; 2358 2359 TXQ_LOCK(txq); 2360 if (__predict_false((eq->flags & EQ_ENABLED) == 0)) { 2361 while (cidx != pidx) { 2362 m0 = r->items[cidx]; 2363 m_freem(m0); 2364 if (++cidx == r->size) 2365 cidx = 0; 2366 } 2367 reclaim_tx_descs(txq, 2048); 2368 total = remaining; 2369 goto done; 2370 } 2371 2372 /* How many hardware descriptors do we have readily available. */ 2373 if (eq->pidx == eq->cidx) 2374 available = eq->sidx - 1; 2375 else 2376 available = IDXDIFF(eq->cidx, eq->pidx, eq->sidx) - 1; 2377 dbdiff = IDXDIFF(eq->pidx, eq->dbidx, eq->sidx); 2378 2379 while (remaining > 0) { 2380 2381 m0 = r->items[cidx]; 2382 M_ASSERTPKTHDR(m0); 2383 MPASS(m0->m_nextpkt == NULL); 2384 2385 if (available < SGE_MAX_WR_NDESC) { 2386 available += reclaim_tx_descs(txq, 64); 2387 if (available < howmany(mbuf_len16(m0), EQ_ESIZE / 16)) 2388 break; /* out of descriptors */ 2389 } 2390 2391 next_cidx = cidx + 1; 2392 if (__predict_false(next_cidx == r->size)) 2393 next_cidx = 0; 2394 2395 wr = (void *)&eq->desc[eq->pidx]; 2396 if (remaining > 1 && 2397 try_txpkts(m0, r->items[next_cidx], &txp, available) == 0) { 2398 2399 /* pkts at cidx, next_cidx should both be in txp. */ 2400 MPASS(txp.npkt == 2); 2401 tail = r->items[next_cidx]; 2402 MPASS(tail->m_nextpkt == NULL); 2403 ETHER_BPF_MTAP(ifp, m0); 2404 ETHER_BPF_MTAP(ifp, tail); 2405 m0->m_nextpkt = tail; 2406 2407 if (__predict_false(++next_cidx == r->size)) 2408 next_cidx = 0; 2409 2410 while (next_cidx != pidx) { 2411 if (add_to_txpkts(r->items[next_cidx], &txp, 2412 available) != 0) 2413 break; 2414 tail->m_nextpkt = r->items[next_cidx]; 2415 tail = tail->m_nextpkt; 2416 ETHER_BPF_MTAP(ifp, tail); 2417 if (__predict_false(++next_cidx == r->size)) 2418 next_cidx = 0; 2419 } 2420 2421 n = write_txpkts_wr(txq, wr, m0, &txp, available); 2422 total += txp.npkt; 2423 remaining -= txp.npkt; 2424 } else { 2425 total++; 2426 remaining--; 2427 n = write_txpkt_wr(txq, (void *)wr, m0, available); 2428 ETHER_BPF_MTAP(ifp, m0); 2429 } 2430 MPASS(n >= 1 && n <= available && n <= SGE_MAX_WR_NDESC); 2431 2432 available -= n; 2433 dbdiff += n; 2434 IDXINCR(eq->pidx, n, eq->sidx); 2435 2436 if (total_available_tx_desc(eq) < eq->sidx / 4 && 2437 atomic_cmpset_int(&eq->equiq, 0, 1)) { 2438 wr->equiq_to_len16 |= htobe32(F_FW_WR_EQUIQ | 2439 F_FW_WR_EQUEQ); 2440 eq->equeqidx = eq->pidx; 2441 } else if (IDXDIFF(eq->pidx, eq->equeqidx, eq->sidx) >= 32) { 2442 wr->equiq_to_len16 |= htobe32(F_FW_WR_EQUEQ); 2443 eq->equeqidx = eq->pidx; 2444 } 2445 2446 if (dbdiff >= 16 && remaining >= 4) { 2447 ring_eq_db(sc, eq, dbdiff); 2448 available += reclaim_tx_descs(txq, 4 * dbdiff); 2449 dbdiff = 0; 2450 } 2451 2452 cidx = next_cidx; 2453 } 2454 if (dbdiff != 0) { 2455 ring_eq_db(sc, eq, dbdiff); 2456 reclaim_tx_descs(txq, 32); 2457 } 2458 done: 2459 TXQ_UNLOCK(txq); 2460 2461 return (total); 2462 } 2463 2464 static inline void 2465 init_iq(struct sge_iq *iq, struct adapter *sc, int tmr_idx, int pktc_idx, 2466 int qsize) 2467 { 2468 2469 KASSERT(tmr_idx >= 0 && tmr_idx < SGE_NTIMERS, 2470 ("%s: bad tmr_idx %d", __func__, tmr_idx)); 2471 KASSERT(pktc_idx < SGE_NCOUNTERS, /* -ve is ok, means don't use */ 2472 ("%s: bad pktc_idx %d", __func__, pktc_idx)); 2473 2474 iq->flags = 0; 2475 iq->adapter = sc; 2476 iq->intr_params = V_QINTR_TIMER_IDX(tmr_idx); 2477 iq->intr_pktc_idx = SGE_NCOUNTERS - 1; 2478 if (pktc_idx >= 0) { 2479 iq->intr_params |= F_QINTR_CNT_EN; 2480 iq->intr_pktc_idx = pktc_idx; 2481 } 2482 iq->qsize = roundup2(qsize, 16); /* See FW_IQ_CMD/iqsize */ 2483 iq->sidx = iq->qsize - spg_len / IQ_ESIZE; 2484 } 2485 2486 static inline void 2487 init_fl(struct adapter *sc, struct sge_fl *fl, int qsize, int maxp, char *name) 2488 { 2489 2490 fl->qsize = qsize; 2491 fl->sidx = qsize - spg_len / EQ_ESIZE; 2492 strlcpy(fl->lockname, name, sizeof(fl->lockname)); 2493 if (sc->flags & BUF_PACKING_OK && 2494 ((!is_t4(sc) && buffer_packing) || /* T5+: enabled unless 0 */ 2495 (is_t4(sc) && buffer_packing == 1)))/* T4: disabled unless 1 */ 2496 fl->flags |= FL_BUF_PACKING; 2497 find_best_refill_source(sc, fl, maxp); 2498 find_safe_refill_source(sc, fl); 2499 } 2500 2501 static inline void 2502 init_eq(struct sge_eq *eq, int eqtype, int qsize, uint8_t tx_chan, 2503 uint16_t iqid, char *name) 2504 { 2505 KASSERT(tx_chan < NCHAN, ("%s: bad tx channel %d", __func__, tx_chan)); 2506 KASSERT(eqtype <= EQ_TYPEMASK, ("%s: bad qtype %d", __func__, eqtype)); 2507 2508 eq->flags = eqtype & EQ_TYPEMASK; 2509 eq->tx_chan = tx_chan; 2510 eq->iqid = iqid; 2511 eq->sidx = qsize - spg_len / EQ_ESIZE; 2512 strlcpy(eq->lockname, name, sizeof(eq->lockname)); 2513 } 2514 2515 static int 2516 alloc_ring(struct adapter *sc, size_t len, bus_dma_tag_t *tag, 2517 bus_dmamap_t *map, bus_addr_t *pa, void **va) 2518 { 2519 int rc; 2520 2521 rc = bus_dma_tag_create(sc->dmat, 512, 0, BUS_SPACE_MAXADDR, 2522 BUS_SPACE_MAXADDR, NULL, NULL, len, 1, len, 0, NULL, NULL, tag); 2523 if (rc != 0) { 2524 device_printf(sc->dev, "cannot allocate DMA tag: %d\n", rc); 2525 goto done; 2526 } 2527 2528 rc = bus_dmamem_alloc(*tag, va, 2529 BUS_DMA_WAITOK | BUS_DMA_COHERENT | BUS_DMA_ZERO, map); 2530 if (rc != 0) { 2531 device_printf(sc->dev, "cannot allocate DMA memory: %d\n", rc); 2532 goto done; 2533 } 2534 2535 rc = bus_dmamap_load(*tag, *map, *va, len, oneseg_dma_callback, pa, 0); 2536 if (rc != 0) { 2537 device_printf(sc->dev, "cannot load DMA map: %d\n", rc); 2538 goto done; 2539 } 2540 done: 2541 if (rc) 2542 free_ring(sc, *tag, *map, *pa, *va); 2543 2544 return (rc); 2545 } 2546 2547 static int 2548 free_ring(struct adapter *sc, bus_dma_tag_t tag, bus_dmamap_t map, 2549 bus_addr_t pa, void *va) 2550 { 2551 if (pa) 2552 bus_dmamap_unload(tag, map); 2553 if (va) 2554 bus_dmamem_free(tag, va, map); 2555 if (tag) 2556 bus_dma_tag_destroy(tag); 2557 2558 return (0); 2559 } 2560 2561 /* 2562 * Allocates the ring for an ingress queue and an optional freelist. If the 2563 * freelist is specified it will be allocated and then associated with the 2564 * ingress queue. 2565 * 2566 * Returns errno on failure. Resources allocated up to that point may still be 2567 * allocated. Caller is responsible for cleanup in case this function fails. 2568 * 2569 * If the ingress queue will take interrupts directly (iq->flags & IQ_INTR) then 2570 * the intr_idx specifies the vector, starting from 0. Otherwise it specifies 2571 * the abs_id of the ingress queue to which its interrupts should be forwarded. 2572 */ 2573 static int 2574 alloc_iq_fl(struct port_info *pi, struct sge_iq *iq, struct sge_fl *fl, 2575 int intr_idx, int cong) 2576 { 2577 int rc, i, cntxt_id; 2578 size_t len; 2579 struct fw_iq_cmd c; 2580 struct adapter *sc = iq->adapter; 2581 __be32 v = 0; 2582 2583 len = iq->qsize * IQ_ESIZE; 2584 rc = alloc_ring(sc, len, &iq->desc_tag, &iq->desc_map, &iq->ba, 2585 (void **)&iq->desc); 2586 if (rc != 0) 2587 return (rc); 2588 2589 bzero(&c, sizeof(c)); 2590 c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_IQ_CMD) | F_FW_CMD_REQUEST | 2591 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_IQ_CMD_PFN(sc->pf) | 2592 V_FW_IQ_CMD_VFN(0)); 2593 2594 c.alloc_to_len16 = htobe32(F_FW_IQ_CMD_ALLOC | F_FW_IQ_CMD_IQSTART | 2595 FW_LEN16(c)); 2596 2597 /* Special handling for firmware event queue */ 2598 if (iq == &sc->sge.fwq) 2599 v |= F_FW_IQ_CMD_IQASYNCH; 2600 2601 if (iq->flags & IQ_INTR) { 2602 KASSERT(intr_idx < sc->intr_count, 2603 ("%s: invalid direct intr_idx %d", __func__, intr_idx)); 2604 } else 2605 v |= F_FW_IQ_CMD_IQANDST; 2606 v |= V_FW_IQ_CMD_IQANDSTINDEX(intr_idx); 2607 2608 c.type_to_iqandstindex = htobe32(v | 2609 V_FW_IQ_CMD_TYPE(FW_IQ_TYPE_FL_INT_CAP) | 2610 V_FW_IQ_CMD_VIID(pi->viid) | 2611 V_FW_IQ_CMD_IQANUD(X_UPDATEDELIVERY_INTERRUPT)); 2612 c.iqdroprss_to_iqesize = htobe16(V_FW_IQ_CMD_IQPCIECH(pi->tx_chan) | 2613 F_FW_IQ_CMD_IQGTSMODE | 2614 V_FW_IQ_CMD_IQINTCNTTHRESH(iq->intr_pktc_idx) | 2615 V_FW_IQ_CMD_IQESIZE(ilog2(IQ_ESIZE) - 4)); 2616 c.iqsize = htobe16(iq->qsize); 2617 c.iqaddr = htobe64(iq->ba); 2618 if (cong >= 0) 2619 c.iqns_to_fl0congen = htobe32(F_FW_IQ_CMD_IQFLINTCONGEN); 2620 2621 if (fl) { 2622 mtx_init(&fl->fl_lock, fl->lockname, NULL, MTX_DEF); 2623 2624 len = fl->qsize * EQ_ESIZE; 2625 rc = alloc_ring(sc, len, &fl->desc_tag, &fl->desc_map, 2626 &fl->ba, (void **)&fl->desc); 2627 if (rc) 2628 return (rc); 2629 2630 /* Allocate space for one software descriptor per buffer. */ 2631 rc = alloc_fl_sdesc(fl); 2632 if (rc != 0) { 2633 device_printf(sc->dev, 2634 "failed to setup fl software descriptors: %d\n", 2635 rc); 2636 return (rc); 2637 } 2638 2639 if (fl->flags & FL_BUF_PACKING) { 2640 fl->lowat = roundup2(sc->sge.fl_starve_threshold2, 8); 2641 fl->buf_boundary = sc->sge.pack_boundary; 2642 } else { 2643 fl->lowat = roundup2(sc->sge.fl_starve_threshold, 8); 2644 fl->buf_boundary = 16; 2645 } 2646 if (fl_pad && fl->buf_boundary < sc->sge.pad_boundary) 2647 fl->buf_boundary = sc->sge.pad_boundary; 2648 2649 c.iqns_to_fl0congen |= 2650 htobe32(V_FW_IQ_CMD_FL0HOSTFCMODE(X_HOSTFCMODE_NONE) | 2651 F_FW_IQ_CMD_FL0FETCHRO | F_FW_IQ_CMD_FL0DATARO | 2652 (fl_pad ? F_FW_IQ_CMD_FL0PADEN : 0) | 2653 (fl->flags & FL_BUF_PACKING ? F_FW_IQ_CMD_FL0PACKEN : 2654 0)); 2655 if (cong >= 0) { 2656 c.iqns_to_fl0congen |= 2657 htobe32(V_FW_IQ_CMD_FL0CNGCHMAP(cong) | 2658 F_FW_IQ_CMD_FL0CONGCIF | 2659 F_FW_IQ_CMD_FL0CONGEN); 2660 } 2661 c.fl0dcaen_to_fl0cidxfthresh = 2662 htobe16(V_FW_IQ_CMD_FL0FBMIN(X_FETCHBURSTMIN_64B) | 2663 V_FW_IQ_CMD_FL0FBMAX(X_FETCHBURSTMAX_512B)); 2664 c.fl0size = htobe16(fl->qsize); 2665 c.fl0addr = htobe64(fl->ba); 2666 } 2667 2668 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c); 2669 if (rc != 0) { 2670 device_printf(sc->dev, 2671 "failed to create ingress queue: %d\n", rc); 2672 return (rc); 2673 } 2674 2675 iq->cidx = 0; 2676 iq->gen = F_RSPD_GEN; 2677 iq->intr_next = iq->intr_params; 2678 iq->cntxt_id = be16toh(c.iqid); 2679 iq->abs_id = be16toh(c.physiqid); 2680 iq->flags |= IQ_ALLOCATED; 2681 2682 cntxt_id = iq->cntxt_id - sc->sge.iq_start; 2683 if (cntxt_id >= sc->sge.niq) { 2684 panic ("%s: iq->cntxt_id (%d) more than the max (%d)", __func__, 2685 cntxt_id, sc->sge.niq - 1); 2686 } 2687 sc->sge.iqmap[cntxt_id] = iq; 2688 2689 if (fl) { 2690 u_int qid; 2691 2692 iq->flags |= IQ_HAS_FL; 2693 fl->cntxt_id = be16toh(c.fl0id); 2694 fl->pidx = fl->cidx = 0; 2695 2696 cntxt_id = fl->cntxt_id - sc->sge.eq_start; 2697 if (cntxt_id >= sc->sge.neq) { 2698 panic("%s: fl->cntxt_id (%d) more than the max (%d)", 2699 __func__, cntxt_id, sc->sge.neq - 1); 2700 } 2701 sc->sge.eqmap[cntxt_id] = (void *)fl; 2702 2703 qid = fl->cntxt_id; 2704 if (isset(&sc->doorbells, DOORBELL_UDB)) { 2705 uint32_t s_qpp = sc->sge.eq_s_qpp; 2706 uint32_t mask = (1 << s_qpp) - 1; 2707 volatile uint8_t *udb; 2708 2709 udb = sc->udbs_base + UDBS_DB_OFFSET; 2710 udb += (qid >> s_qpp) << PAGE_SHIFT; 2711 qid &= mask; 2712 if (qid < PAGE_SIZE / UDBS_SEG_SIZE) { 2713 udb += qid << UDBS_SEG_SHIFT; 2714 qid = 0; 2715 } 2716 fl->udb = (volatile void *)udb; 2717 } 2718 fl->dbval = F_DBPRIO | V_QID(qid); 2719 if (is_t5(sc)) 2720 fl->dbval |= F_DBTYPE; 2721 2722 FL_LOCK(fl); 2723 /* Enough to make sure the SGE doesn't think it's starved */ 2724 refill_fl(sc, fl, fl->lowat); 2725 FL_UNLOCK(fl); 2726 } 2727 2728 if (is_t5(sc) && cong >= 0) { 2729 uint32_t param, val; 2730 2731 param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ) | 2732 V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DMAQ_CONM_CTXT) | 2733 V_FW_PARAMS_PARAM_YZ(iq->cntxt_id); 2734 if (cong == 0) 2735 val = 1 << 19; 2736 else { 2737 val = 2 << 19; 2738 for (i = 0; i < 4; i++) { 2739 if (cong & (1 << i)) 2740 val |= 1 << (i << 2); 2741 } 2742 } 2743 2744 rc = -t4_set_params(sc, sc->mbox, sc->pf, 0, 1, ¶m, &val); 2745 if (rc != 0) { 2746 /* report error but carry on */ 2747 device_printf(sc->dev, 2748 "failed to set congestion manager context for " 2749 "ingress queue %d: %d\n", iq->cntxt_id, rc); 2750 } 2751 } 2752 2753 /* Enable IQ interrupts */ 2754 atomic_store_rel_int(&iq->state, IQS_IDLE); 2755 t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS), V_SEINTARM(iq->intr_params) | 2756 V_INGRESSQID(iq->cntxt_id)); 2757 2758 return (0); 2759 } 2760 2761 static int 2762 free_iq_fl(struct port_info *pi, struct sge_iq *iq, struct sge_fl *fl) 2763 { 2764 int rc; 2765 struct adapter *sc = iq->adapter; 2766 device_t dev; 2767 2768 if (sc == NULL) 2769 return (0); /* nothing to do */ 2770 2771 dev = pi ? pi->dev : sc->dev; 2772 2773 if (iq->flags & IQ_ALLOCATED) { 2774 rc = -t4_iq_free(sc, sc->mbox, sc->pf, 0, 2775 FW_IQ_TYPE_FL_INT_CAP, iq->cntxt_id, 2776 fl ? fl->cntxt_id : 0xffff, 0xffff); 2777 if (rc != 0) { 2778 device_printf(dev, 2779 "failed to free queue %p: %d\n", iq, rc); 2780 return (rc); 2781 } 2782 iq->flags &= ~IQ_ALLOCATED; 2783 } 2784 2785 free_ring(sc, iq->desc_tag, iq->desc_map, iq->ba, iq->desc); 2786 2787 bzero(iq, sizeof(*iq)); 2788 2789 if (fl) { 2790 free_ring(sc, fl->desc_tag, fl->desc_map, fl->ba, 2791 fl->desc); 2792 2793 if (fl->sdesc) 2794 free_fl_sdesc(sc, fl); 2795 2796 if (mtx_initialized(&fl->fl_lock)) 2797 mtx_destroy(&fl->fl_lock); 2798 2799 bzero(fl, sizeof(*fl)); 2800 } 2801 2802 return (0); 2803 } 2804 2805 static void 2806 add_fl_sysctls(struct sysctl_ctx_list *ctx, struct sysctl_oid *oid, 2807 struct sge_fl *fl) 2808 { 2809 struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid); 2810 2811 oid = SYSCTL_ADD_NODE(ctx, children, OID_AUTO, "fl", CTLFLAG_RD, NULL, 2812 "freelist"); 2813 children = SYSCTL_CHILDREN(oid); 2814 2815 SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cntxt_id", 2816 CTLTYPE_INT | CTLFLAG_RD, &fl->cntxt_id, 0, sysctl_uint16, "I", 2817 "SGE context id of the freelist"); 2818 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "padding", CTLFLAG_RD, NULL, 2819 fl_pad ? 1 : 0, "padding enabled"); 2820 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "packing", CTLFLAG_RD, NULL, 2821 fl->flags & FL_BUF_PACKING ? 1 : 0, "packing enabled"); 2822 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "cidx", CTLFLAG_RD, &fl->cidx, 2823 0, "consumer index"); 2824 if (fl->flags & FL_BUF_PACKING) { 2825 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "rx_offset", 2826 CTLFLAG_RD, &fl->rx_offset, 0, "packing rx offset"); 2827 } 2828 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "pidx", CTLFLAG_RD, &fl->pidx, 2829 0, "producer index"); 2830 SYSCTL_ADD_UQUAD(ctx, children, OID_AUTO, "mbuf_allocated", 2831 CTLFLAG_RD, &fl->mbuf_allocated, "# of mbuf allocated"); 2832 SYSCTL_ADD_UQUAD(ctx, children, OID_AUTO, "mbuf_inlined", 2833 CTLFLAG_RD, &fl->mbuf_inlined, "# of mbuf inlined in clusters"); 2834 SYSCTL_ADD_UQUAD(ctx, children, OID_AUTO, "cluster_allocated", 2835 CTLFLAG_RD, &fl->cl_allocated, "# of clusters allocated"); 2836 SYSCTL_ADD_UQUAD(ctx, children, OID_AUTO, "cluster_recycled", 2837 CTLFLAG_RD, &fl->cl_recycled, "# of clusters recycled"); 2838 SYSCTL_ADD_UQUAD(ctx, children, OID_AUTO, "cluster_fast_recycled", 2839 CTLFLAG_RD, &fl->cl_fast_recycled, "# of clusters recycled (fast)"); 2840 } 2841 2842 static int 2843 alloc_fwq(struct adapter *sc) 2844 { 2845 int rc, intr_idx; 2846 struct sge_iq *fwq = &sc->sge.fwq; 2847 struct sysctl_oid *oid = device_get_sysctl_tree(sc->dev); 2848 struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid); 2849 2850 init_iq(fwq, sc, 0, 0, FW_IQ_QSIZE); 2851 fwq->flags |= IQ_INTR; /* always */ 2852 intr_idx = sc->intr_count > 1 ? 1 : 0; 2853 rc = alloc_iq_fl(sc->port[0], fwq, NULL, intr_idx, -1); 2854 if (rc != 0) { 2855 device_printf(sc->dev, 2856 "failed to create firmware event queue: %d\n", rc); 2857 return (rc); 2858 } 2859 2860 oid = SYSCTL_ADD_NODE(&sc->ctx, children, OID_AUTO, "fwq", CTLFLAG_RD, 2861 NULL, "firmware event queue"); 2862 children = SYSCTL_CHILDREN(oid); 2863 2864 SYSCTL_ADD_PROC(&sc->ctx, children, OID_AUTO, "abs_id", 2865 CTLTYPE_INT | CTLFLAG_RD, &fwq->abs_id, 0, sysctl_uint16, "I", 2866 "absolute id of the queue"); 2867 SYSCTL_ADD_PROC(&sc->ctx, children, OID_AUTO, "cntxt_id", 2868 CTLTYPE_INT | CTLFLAG_RD, &fwq->cntxt_id, 0, sysctl_uint16, "I", 2869 "SGE context id of the queue"); 2870 SYSCTL_ADD_PROC(&sc->ctx, children, OID_AUTO, "cidx", 2871 CTLTYPE_INT | CTLFLAG_RD, &fwq->cidx, 0, sysctl_uint16, "I", 2872 "consumer index"); 2873 2874 return (0); 2875 } 2876 2877 static int 2878 free_fwq(struct adapter *sc) 2879 { 2880 return free_iq_fl(NULL, &sc->sge.fwq, NULL); 2881 } 2882 2883 static int 2884 alloc_mgmtq(struct adapter *sc) 2885 { 2886 int rc; 2887 struct sge_wrq *mgmtq = &sc->sge.mgmtq; 2888 char name[16]; 2889 struct sysctl_oid *oid = device_get_sysctl_tree(sc->dev); 2890 struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid); 2891 2892 oid = SYSCTL_ADD_NODE(&sc->ctx, children, OID_AUTO, "mgmtq", CTLFLAG_RD, 2893 NULL, "management queue"); 2894 2895 snprintf(name, sizeof(name), "%s mgmtq", device_get_nameunit(sc->dev)); 2896 init_eq(&mgmtq->eq, EQ_CTRL, CTRL_EQ_QSIZE, sc->port[0]->tx_chan, 2897 sc->sge.fwq.cntxt_id, name); 2898 rc = alloc_wrq(sc, NULL, mgmtq, oid); 2899 if (rc != 0) { 2900 device_printf(sc->dev, 2901 "failed to create management queue: %d\n", rc); 2902 return (rc); 2903 } 2904 2905 return (0); 2906 } 2907 2908 static int 2909 free_mgmtq(struct adapter *sc) 2910 { 2911 2912 return free_wrq(sc, &sc->sge.mgmtq); 2913 } 2914 2915 int 2916 tnl_cong(struct port_info *pi) 2917 { 2918 2919 if (cong_drop == -1) 2920 return (-1); 2921 else if (cong_drop == 1) 2922 return (0); 2923 else 2924 return (pi->rx_chan_map); 2925 } 2926 2927 static int 2928 alloc_rxq(struct port_info *pi, struct sge_rxq *rxq, int intr_idx, int idx, 2929 struct sysctl_oid *oid) 2930 { 2931 int rc; 2932 struct sysctl_oid_list *children; 2933 char name[16]; 2934 2935 rc = alloc_iq_fl(pi, &rxq->iq, &rxq->fl, intr_idx, tnl_cong(pi)); 2936 if (rc != 0) 2937 return (rc); 2938 2939 /* 2940 * The freelist is just barely above the starvation threshold right now, 2941 * fill it up a bit more. 2942 */ 2943 FL_LOCK(&rxq->fl); 2944 refill_fl(pi->adapter, &rxq->fl, 128); 2945 FL_UNLOCK(&rxq->fl); 2946 2947 #if defined(INET) || defined(INET6) 2948 rc = tcp_lro_init(&rxq->lro); 2949 if (rc != 0) 2950 return (rc); 2951 rxq->lro.ifp = pi->ifp; /* also indicates LRO init'ed */ 2952 2953 if (pi->ifp->if_capenable & IFCAP_LRO) 2954 rxq->iq.flags |= IQ_LRO_ENABLED; 2955 #endif 2956 rxq->ifp = pi->ifp; 2957 2958 children = SYSCTL_CHILDREN(oid); 2959 2960 snprintf(name, sizeof(name), "%d", idx); 2961 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, name, CTLFLAG_RD, 2962 NULL, "rx queue"); 2963 children = SYSCTL_CHILDREN(oid); 2964 2965 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "abs_id", 2966 CTLTYPE_INT | CTLFLAG_RD, &rxq->iq.abs_id, 0, sysctl_uint16, "I", 2967 "absolute id of the queue"); 2968 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cntxt_id", 2969 CTLTYPE_INT | CTLFLAG_RD, &rxq->iq.cntxt_id, 0, sysctl_uint16, "I", 2970 "SGE context id of the queue"); 2971 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cidx", 2972 CTLTYPE_INT | CTLFLAG_RD, &rxq->iq.cidx, 0, sysctl_uint16, "I", 2973 "consumer index"); 2974 #if defined(INET) || defined(INET6) 2975 SYSCTL_ADD_INT(&pi->ctx, children, OID_AUTO, "lro_queued", CTLFLAG_RD, 2976 &rxq->lro.lro_queued, 0, NULL); 2977 SYSCTL_ADD_INT(&pi->ctx, children, OID_AUTO, "lro_flushed", CTLFLAG_RD, 2978 &rxq->lro.lro_flushed, 0, NULL); 2979 #endif 2980 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "rxcsum", CTLFLAG_RD, 2981 &rxq->rxcsum, "# of times hardware assisted with checksum"); 2982 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "vlan_extraction", 2983 CTLFLAG_RD, &rxq->vlan_extraction, 2984 "# of times hardware extracted 802.1Q tag"); 2985 2986 add_fl_sysctls(&pi->ctx, oid, &rxq->fl); 2987 2988 return (rc); 2989 } 2990 2991 static int 2992 free_rxq(struct port_info *pi, struct sge_rxq *rxq) 2993 { 2994 int rc; 2995 2996 #if defined(INET) || defined(INET6) 2997 if (rxq->lro.ifp) { 2998 tcp_lro_free(&rxq->lro); 2999 rxq->lro.ifp = NULL; 3000 } 3001 #endif 3002 3003 rc = free_iq_fl(pi, &rxq->iq, &rxq->fl); 3004 if (rc == 0) 3005 bzero(rxq, sizeof(*rxq)); 3006 3007 return (rc); 3008 } 3009 3010 #ifdef TCP_OFFLOAD 3011 static int 3012 alloc_ofld_rxq(struct port_info *pi, struct sge_ofld_rxq *ofld_rxq, 3013 int intr_idx, int idx, struct sysctl_oid *oid) 3014 { 3015 int rc; 3016 struct sysctl_oid_list *children; 3017 char name[16]; 3018 3019 rc = alloc_iq_fl(pi, &ofld_rxq->iq, &ofld_rxq->fl, intr_idx, 3020 pi->rx_chan_map); 3021 if (rc != 0) 3022 return (rc); 3023 3024 children = SYSCTL_CHILDREN(oid); 3025 3026 snprintf(name, sizeof(name), "%d", idx); 3027 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, name, CTLFLAG_RD, 3028 NULL, "rx queue"); 3029 children = SYSCTL_CHILDREN(oid); 3030 3031 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "abs_id", 3032 CTLTYPE_INT | CTLFLAG_RD, &ofld_rxq->iq.abs_id, 0, sysctl_uint16, 3033 "I", "absolute id of the queue"); 3034 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cntxt_id", 3035 CTLTYPE_INT | CTLFLAG_RD, &ofld_rxq->iq.cntxt_id, 0, sysctl_uint16, 3036 "I", "SGE context id of the queue"); 3037 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cidx", 3038 CTLTYPE_INT | CTLFLAG_RD, &ofld_rxq->iq.cidx, 0, sysctl_uint16, "I", 3039 "consumer index"); 3040 3041 add_fl_sysctls(&pi->ctx, oid, &ofld_rxq->fl); 3042 3043 return (rc); 3044 } 3045 3046 static int 3047 free_ofld_rxq(struct port_info *pi, struct sge_ofld_rxq *ofld_rxq) 3048 { 3049 int rc; 3050 3051 rc = free_iq_fl(pi, &ofld_rxq->iq, &ofld_rxq->fl); 3052 if (rc == 0) 3053 bzero(ofld_rxq, sizeof(*ofld_rxq)); 3054 3055 return (rc); 3056 } 3057 #endif 3058 3059 #ifdef DEV_NETMAP 3060 static int 3061 alloc_nm_rxq(struct port_info *pi, struct sge_nm_rxq *nm_rxq, int intr_idx, 3062 int idx, struct sysctl_oid *oid) 3063 { 3064 int rc; 3065 struct sysctl_oid_list *children; 3066 struct sysctl_ctx_list *ctx; 3067 char name[16]; 3068 size_t len; 3069 struct adapter *sc = pi->adapter; 3070 struct netmap_adapter *na = NA(pi->nm_ifp); 3071 3072 MPASS(na != NULL); 3073 3074 len = pi->qsize_rxq * IQ_ESIZE; 3075 rc = alloc_ring(sc, len, &nm_rxq->iq_desc_tag, &nm_rxq->iq_desc_map, 3076 &nm_rxq->iq_ba, (void **)&nm_rxq->iq_desc); 3077 if (rc != 0) 3078 return (rc); 3079 3080 len = na->num_rx_desc * EQ_ESIZE + spg_len; 3081 rc = alloc_ring(sc, len, &nm_rxq->fl_desc_tag, &nm_rxq->fl_desc_map, 3082 &nm_rxq->fl_ba, (void **)&nm_rxq->fl_desc); 3083 if (rc != 0) 3084 return (rc); 3085 3086 nm_rxq->pi = pi; 3087 nm_rxq->nid = idx; 3088 nm_rxq->iq_cidx = 0; 3089 nm_rxq->iq_sidx = pi->qsize_rxq - spg_len / IQ_ESIZE; 3090 nm_rxq->iq_gen = F_RSPD_GEN; 3091 nm_rxq->fl_pidx = nm_rxq->fl_cidx = 0; 3092 nm_rxq->fl_sidx = na->num_rx_desc; 3093 nm_rxq->intr_idx = intr_idx; 3094 3095 ctx = &pi->ctx; 3096 children = SYSCTL_CHILDREN(oid); 3097 3098 snprintf(name, sizeof(name), "%d", idx); 3099 oid = SYSCTL_ADD_NODE(ctx, children, OID_AUTO, name, CTLFLAG_RD, NULL, 3100 "rx queue"); 3101 children = SYSCTL_CHILDREN(oid); 3102 3103 SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "abs_id", 3104 CTLTYPE_INT | CTLFLAG_RD, &nm_rxq->iq_abs_id, 0, sysctl_uint16, 3105 "I", "absolute id of the queue"); 3106 SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cntxt_id", 3107 CTLTYPE_INT | CTLFLAG_RD, &nm_rxq->iq_cntxt_id, 0, sysctl_uint16, 3108 "I", "SGE context id of the queue"); 3109 SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cidx", 3110 CTLTYPE_INT | CTLFLAG_RD, &nm_rxq->iq_cidx, 0, sysctl_uint16, "I", 3111 "consumer index"); 3112 3113 children = SYSCTL_CHILDREN(oid); 3114 oid = SYSCTL_ADD_NODE(ctx, children, OID_AUTO, "fl", CTLFLAG_RD, NULL, 3115 "freelist"); 3116 children = SYSCTL_CHILDREN(oid); 3117 3118 SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cntxt_id", 3119 CTLTYPE_INT | CTLFLAG_RD, &nm_rxq->fl_cntxt_id, 0, sysctl_uint16, 3120 "I", "SGE context id of the freelist"); 3121 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "cidx", CTLFLAG_RD, 3122 &nm_rxq->fl_cidx, 0, "consumer index"); 3123 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "pidx", CTLFLAG_RD, 3124 &nm_rxq->fl_pidx, 0, "producer index"); 3125 3126 return (rc); 3127 } 3128 3129 3130 static int 3131 free_nm_rxq(struct port_info *pi, struct sge_nm_rxq *nm_rxq) 3132 { 3133 struct adapter *sc = pi->adapter; 3134 3135 free_ring(sc, nm_rxq->iq_desc_tag, nm_rxq->iq_desc_map, nm_rxq->iq_ba, 3136 nm_rxq->iq_desc); 3137 free_ring(sc, nm_rxq->fl_desc_tag, nm_rxq->fl_desc_map, nm_rxq->fl_ba, 3138 nm_rxq->fl_desc); 3139 3140 return (0); 3141 } 3142 3143 static int 3144 alloc_nm_txq(struct port_info *pi, struct sge_nm_txq *nm_txq, int iqidx, int idx, 3145 struct sysctl_oid *oid) 3146 { 3147 int rc; 3148 size_t len; 3149 struct adapter *sc = pi->adapter; 3150 struct netmap_adapter *na = NA(pi->nm_ifp); 3151 char name[16]; 3152 struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid); 3153 3154 len = na->num_tx_desc * EQ_ESIZE + spg_len; 3155 rc = alloc_ring(sc, len, &nm_txq->desc_tag, &nm_txq->desc_map, 3156 &nm_txq->ba, (void **)&nm_txq->desc); 3157 if (rc) 3158 return (rc); 3159 3160 nm_txq->pidx = nm_txq->cidx = 0; 3161 nm_txq->sidx = na->num_tx_desc; 3162 nm_txq->nid = idx; 3163 nm_txq->iqidx = iqidx; 3164 nm_txq->cpl_ctrl0 = htobe32(V_TXPKT_OPCODE(CPL_TX_PKT) | 3165 V_TXPKT_INTF(pi->tx_chan) | V_TXPKT_PF(sc->pf)); 3166 3167 snprintf(name, sizeof(name), "%d", idx); 3168 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, name, CTLFLAG_RD, 3169 NULL, "netmap tx queue"); 3170 children = SYSCTL_CHILDREN(oid); 3171 3172 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "cntxt_id", CTLFLAG_RD, 3173 &nm_txq->cntxt_id, 0, "SGE context id of the queue"); 3174 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cidx", 3175 CTLTYPE_INT | CTLFLAG_RD, &nm_txq->cidx, 0, sysctl_uint16, "I", 3176 "consumer index"); 3177 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "pidx", 3178 CTLTYPE_INT | CTLFLAG_RD, &nm_txq->pidx, 0, sysctl_uint16, "I", 3179 "producer index"); 3180 3181 return (rc); 3182 } 3183 3184 static int 3185 free_nm_txq(struct port_info *pi, struct sge_nm_txq *nm_txq) 3186 { 3187 struct adapter *sc = pi->adapter; 3188 3189 free_ring(sc, nm_txq->desc_tag, nm_txq->desc_map, nm_txq->ba, 3190 nm_txq->desc); 3191 3192 return (0); 3193 } 3194 #endif 3195 3196 static int 3197 ctrl_eq_alloc(struct adapter *sc, struct sge_eq *eq) 3198 { 3199 int rc, cntxt_id; 3200 struct fw_eq_ctrl_cmd c; 3201 int qsize = eq->sidx + spg_len / EQ_ESIZE; 3202 3203 bzero(&c, sizeof(c)); 3204 3205 c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_EQ_CTRL_CMD) | F_FW_CMD_REQUEST | 3206 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_EQ_CTRL_CMD_PFN(sc->pf) | 3207 V_FW_EQ_CTRL_CMD_VFN(0)); 3208 c.alloc_to_len16 = htobe32(F_FW_EQ_CTRL_CMD_ALLOC | 3209 F_FW_EQ_CTRL_CMD_EQSTART | FW_LEN16(c)); 3210 c.cmpliqid_eqid = htonl(V_FW_EQ_CTRL_CMD_CMPLIQID(eq->iqid)); 3211 c.physeqid_pkd = htobe32(0); 3212 c.fetchszm_to_iqid = 3213 htobe32(V_FW_EQ_CTRL_CMD_HOSTFCMODE(X_HOSTFCMODE_NONE) | 3214 V_FW_EQ_CTRL_CMD_PCIECHN(eq->tx_chan) | 3215 F_FW_EQ_CTRL_CMD_FETCHRO | V_FW_EQ_CTRL_CMD_IQID(eq->iqid)); 3216 c.dcaen_to_eqsize = 3217 htobe32(V_FW_EQ_CTRL_CMD_FBMIN(X_FETCHBURSTMIN_64B) | 3218 V_FW_EQ_CTRL_CMD_FBMAX(X_FETCHBURSTMAX_512B) | 3219 V_FW_EQ_CTRL_CMD_EQSIZE(qsize)); 3220 c.eqaddr = htobe64(eq->ba); 3221 3222 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c); 3223 if (rc != 0) { 3224 device_printf(sc->dev, 3225 "failed to create control queue %d: %d\n", eq->tx_chan, rc); 3226 return (rc); 3227 } 3228 eq->flags |= EQ_ALLOCATED; 3229 3230 eq->cntxt_id = G_FW_EQ_CTRL_CMD_EQID(be32toh(c.cmpliqid_eqid)); 3231 cntxt_id = eq->cntxt_id - sc->sge.eq_start; 3232 if (cntxt_id >= sc->sge.neq) 3233 panic("%s: eq->cntxt_id (%d) more than the max (%d)", __func__, 3234 cntxt_id, sc->sge.neq - 1); 3235 sc->sge.eqmap[cntxt_id] = eq; 3236 3237 return (rc); 3238 } 3239 3240 static int 3241 eth_eq_alloc(struct adapter *sc, struct port_info *pi, struct sge_eq *eq) 3242 { 3243 int rc, cntxt_id; 3244 struct fw_eq_eth_cmd c; 3245 int qsize = eq->sidx + spg_len / EQ_ESIZE; 3246 3247 bzero(&c, sizeof(c)); 3248 3249 c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_EQ_ETH_CMD) | F_FW_CMD_REQUEST | 3250 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_EQ_ETH_CMD_PFN(sc->pf) | 3251 V_FW_EQ_ETH_CMD_VFN(0)); 3252 c.alloc_to_len16 = htobe32(F_FW_EQ_ETH_CMD_ALLOC | 3253 F_FW_EQ_ETH_CMD_EQSTART | FW_LEN16(c)); 3254 c.autoequiqe_to_viid = htobe32(F_FW_EQ_ETH_CMD_AUTOEQUIQE | 3255 F_FW_EQ_ETH_CMD_AUTOEQUEQE | V_FW_EQ_ETH_CMD_VIID(pi->viid)); 3256 c.fetchszm_to_iqid = 3257 htobe32(V_FW_EQ_ETH_CMD_HOSTFCMODE(X_HOSTFCMODE_NONE) | 3258 V_FW_EQ_ETH_CMD_PCIECHN(eq->tx_chan) | F_FW_EQ_ETH_CMD_FETCHRO | 3259 V_FW_EQ_ETH_CMD_IQID(eq->iqid)); 3260 c.dcaen_to_eqsize = htobe32(V_FW_EQ_ETH_CMD_FBMIN(X_FETCHBURSTMIN_64B) | 3261 V_FW_EQ_ETH_CMD_FBMAX(X_FETCHBURSTMAX_512B) | 3262 V_FW_EQ_ETH_CMD_EQSIZE(qsize)); 3263 c.eqaddr = htobe64(eq->ba); 3264 3265 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c); 3266 if (rc != 0) { 3267 device_printf(pi->dev, 3268 "failed to create Ethernet egress queue: %d\n", rc); 3269 return (rc); 3270 } 3271 eq->flags |= EQ_ALLOCATED; 3272 3273 eq->cntxt_id = G_FW_EQ_ETH_CMD_EQID(be32toh(c.eqid_pkd)); 3274 cntxt_id = eq->cntxt_id - sc->sge.eq_start; 3275 if (cntxt_id >= sc->sge.neq) 3276 panic("%s: eq->cntxt_id (%d) more than the max (%d)", __func__, 3277 cntxt_id, sc->sge.neq - 1); 3278 sc->sge.eqmap[cntxt_id] = eq; 3279 3280 return (rc); 3281 } 3282 3283 #ifdef TCP_OFFLOAD 3284 static int 3285 ofld_eq_alloc(struct adapter *sc, struct port_info *pi, struct sge_eq *eq) 3286 { 3287 int rc, cntxt_id; 3288 struct fw_eq_ofld_cmd c; 3289 int qsize = eq->sidx + spg_len / EQ_ESIZE; 3290 3291 bzero(&c, sizeof(c)); 3292 3293 c.op_to_vfn = htonl(V_FW_CMD_OP(FW_EQ_OFLD_CMD) | F_FW_CMD_REQUEST | 3294 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_EQ_OFLD_CMD_PFN(sc->pf) | 3295 V_FW_EQ_OFLD_CMD_VFN(0)); 3296 c.alloc_to_len16 = htonl(F_FW_EQ_OFLD_CMD_ALLOC | 3297 F_FW_EQ_OFLD_CMD_EQSTART | FW_LEN16(c)); 3298 c.fetchszm_to_iqid = 3299 htonl(V_FW_EQ_OFLD_CMD_HOSTFCMODE(X_HOSTFCMODE_NONE) | 3300 V_FW_EQ_OFLD_CMD_PCIECHN(eq->tx_chan) | 3301 F_FW_EQ_OFLD_CMD_FETCHRO | V_FW_EQ_OFLD_CMD_IQID(eq->iqid)); 3302 c.dcaen_to_eqsize = 3303 htobe32(V_FW_EQ_OFLD_CMD_FBMIN(X_FETCHBURSTMIN_64B) | 3304 V_FW_EQ_OFLD_CMD_FBMAX(X_FETCHBURSTMAX_512B) | 3305 V_FW_EQ_OFLD_CMD_EQSIZE(qsize)); 3306 c.eqaddr = htobe64(eq->ba); 3307 3308 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c); 3309 if (rc != 0) { 3310 device_printf(pi->dev, 3311 "failed to create egress queue for TCP offload: %d\n", rc); 3312 return (rc); 3313 } 3314 eq->flags |= EQ_ALLOCATED; 3315 3316 eq->cntxt_id = G_FW_EQ_OFLD_CMD_EQID(be32toh(c.eqid_pkd)); 3317 cntxt_id = eq->cntxt_id - sc->sge.eq_start; 3318 if (cntxt_id >= sc->sge.neq) 3319 panic("%s: eq->cntxt_id (%d) more than the max (%d)", __func__, 3320 cntxt_id, sc->sge.neq - 1); 3321 sc->sge.eqmap[cntxt_id] = eq; 3322 3323 return (rc); 3324 } 3325 #endif 3326 3327 static int 3328 alloc_eq(struct adapter *sc, struct port_info *pi, struct sge_eq *eq) 3329 { 3330 int rc, qsize; 3331 size_t len; 3332 3333 mtx_init(&eq->eq_lock, eq->lockname, NULL, MTX_DEF); 3334 3335 qsize = eq->sidx + spg_len / EQ_ESIZE; 3336 len = qsize * EQ_ESIZE; 3337 rc = alloc_ring(sc, len, &eq->desc_tag, &eq->desc_map, 3338 &eq->ba, (void **)&eq->desc); 3339 if (rc) 3340 return (rc); 3341 3342 eq->pidx = eq->cidx = 0; 3343 eq->equeqidx = eq->dbidx = 0; 3344 eq->doorbells = sc->doorbells; 3345 3346 switch (eq->flags & EQ_TYPEMASK) { 3347 case EQ_CTRL: 3348 rc = ctrl_eq_alloc(sc, eq); 3349 break; 3350 3351 case EQ_ETH: 3352 rc = eth_eq_alloc(sc, pi, eq); 3353 break; 3354 3355 #ifdef TCP_OFFLOAD 3356 case EQ_OFLD: 3357 rc = ofld_eq_alloc(sc, pi, eq); 3358 break; 3359 #endif 3360 3361 default: 3362 panic("%s: invalid eq type %d.", __func__, 3363 eq->flags & EQ_TYPEMASK); 3364 } 3365 if (rc != 0) { 3366 device_printf(sc->dev, 3367 "failed to allocate egress queue(%d): %d\n", 3368 eq->flags & EQ_TYPEMASK, rc); 3369 } 3370 3371 if (isset(&eq->doorbells, DOORBELL_UDB) || 3372 isset(&eq->doorbells, DOORBELL_UDBWC) || 3373 isset(&eq->doorbells, DOORBELL_WCWR)) { 3374 uint32_t s_qpp = sc->sge.eq_s_qpp; 3375 uint32_t mask = (1 << s_qpp) - 1; 3376 volatile uint8_t *udb; 3377 3378 udb = sc->udbs_base + UDBS_DB_OFFSET; 3379 udb += (eq->cntxt_id >> s_qpp) << PAGE_SHIFT; /* pg offset */ 3380 eq->udb_qid = eq->cntxt_id & mask; /* id in page */ 3381 if (eq->udb_qid >= PAGE_SIZE / UDBS_SEG_SIZE) 3382 clrbit(&eq->doorbells, DOORBELL_WCWR); 3383 else { 3384 udb += eq->udb_qid << UDBS_SEG_SHIFT; /* seg offset */ 3385 eq->udb_qid = 0; 3386 } 3387 eq->udb = (volatile void *)udb; 3388 } 3389 3390 return (rc); 3391 } 3392 3393 static int 3394 free_eq(struct adapter *sc, struct sge_eq *eq) 3395 { 3396 int rc; 3397 3398 if (eq->flags & EQ_ALLOCATED) { 3399 switch (eq->flags & EQ_TYPEMASK) { 3400 case EQ_CTRL: 3401 rc = -t4_ctrl_eq_free(sc, sc->mbox, sc->pf, 0, 3402 eq->cntxt_id); 3403 break; 3404 3405 case EQ_ETH: 3406 rc = -t4_eth_eq_free(sc, sc->mbox, sc->pf, 0, 3407 eq->cntxt_id); 3408 break; 3409 3410 #ifdef TCP_OFFLOAD 3411 case EQ_OFLD: 3412 rc = -t4_ofld_eq_free(sc, sc->mbox, sc->pf, 0, 3413 eq->cntxt_id); 3414 break; 3415 #endif 3416 3417 default: 3418 panic("%s: invalid eq type %d.", __func__, 3419 eq->flags & EQ_TYPEMASK); 3420 } 3421 if (rc != 0) { 3422 device_printf(sc->dev, 3423 "failed to free egress queue (%d): %d\n", 3424 eq->flags & EQ_TYPEMASK, rc); 3425 return (rc); 3426 } 3427 eq->flags &= ~EQ_ALLOCATED; 3428 } 3429 3430 free_ring(sc, eq->desc_tag, eq->desc_map, eq->ba, eq->desc); 3431 3432 if (mtx_initialized(&eq->eq_lock)) 3433 mtx_destroy(&eq->eq_lock); 3434 3435 bzero(eq, sizeof(*eq)); 3436 return (0); 3437 } 3438 3439 static int 3440 alloc_wrq(struct adapter *sc, struct port_info *pi, struct sge_wrq *wrq, 3441 struct sysctl_oid *oid) 3442 { 3443 int rc; 3444 struct sysctl_ctx_list *ctx = pi ? &pi->ctx : &sc->ctx; 3445 struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid); 3446 3447 rc = alloc_eq(sc, pi, &wrq->eq); 3448 if (rc) 3449 return (rc); 3450 3451 wrq->adapter = sc; 3452 TASK_INIT(&wrq->wrq_tx_task, 0, wrq_tx_drain, wrq); 3453 TAILQ_INIT(&wrq->incomplete_wrs); 3454 STAILQ_INIT(&wrq->wr_list); 3455 wrq->nwr_pending = 0; 3456 wrq->ndesc_needed = 0; 3457 3458 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "cntxt_id", CTLFLAG_RD, 3459 &wrq->eq.cntxt_id, 0, "SGE context id of the queue"); 3460 SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cidx", 3461 CTLTYPE_INT | CTLFLAG_RD, &wrq->eq.cidx, 0, sysctl_uint16, "I", 3462 "consumer index"); 3463 SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "pidx", 3464 CTLTYPE_INT | CTLFLAG_RD, &wrq->eq.pidx, 0, sysctl_uint16, "I", 3465 "producer index"); 3466 SYSCTL_ADD_UQUAD(ctx, children, OID_AUTO, "tx_wrs_direct", CTLFLAG_RD, 3467 &wrq->tx_wrs_direct, "# of work requests (direct)"); 3468 SYSCTL_ADD_UQUAD(ctx, children, OID_AUTO, "tx_wrs_copied", CTLFLAG_RD, 3469 &wrq->tx_wrs_copied, "# of work requests (copied)"); 3470 3471 return (rc); 3472 } 3473 3474 static int 3475 free_wrq(struct adapter *sc, struct sge_wrq *wrq) 3476 { 3477 int rc; 3478 3479 rc = free_eq(sc, &wrq->eq); 3480 if (rc) 3481 return (rc); 3482 3483 bzero(wrq, sizeof(*wrq)); 3484 return (0); 3485 } 3486 3487 static int 3488 alloc_txq(struct port_info *pi, struct sge_txq *txq, int idx, 3489 struct sysctl_oid *oid) 3490 { 3491 int rc; 3492 struct adapter *sc = pi->adapter; 3493 struct sge_eq *eq = &txq->eq; 3494 char name[16]; 3495 struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid); 3496 3497 rc = mp_ring_alloc(&txq->r, eq->sidx, txq, eth_tx, can_resume_eth_tx, 3498 M_CXGBE, M_WAITOK); 3499 if (rc != 0) { 3500 device_printf(sc->dev, "failed to allocate mp_ring: %d\n", rc); 3501 return (rc); 3502 } 3503 3504 rc = alloc_eq(sc, pi, eq); 3505 if (rc != 0) { 3506 mp_ring_free(txq->r); 3507 txq->r = NULL; 3508 return (rc); 3509 } 3510 3511 /* Can't fail after this point. */ 3512 3513 TASK_INIT(&txq->tx_reclaim_task, 0, tx_reclaim, eq); 3514 txq->ifp = pi->ifp; 3515 txq->gl = sglist_alloc(TX_SGL_SEGS, M_WAITOK); 3516 txq->cpl_ctrl0 = htobe32(V_TXPKT_OPCODE(CPL_TX_PKT) | 3517 V_TXPKT_INTF(pi->tx_chan) | V_TXPKT_PF(sc->pf)); 3518 txq->sdesc = malloc(eq->sidx * sizeof(struct tx_sdesc), M_CXGBE, 3519 M_ZERO | M_WAITOK); 3520 3521 snprintf(name, sizeof(name), "%d", idx); 3522 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, name, CTLFLAG_RD, 3523 NULL, "tx queue"); 3524 children = SYSCTL_CHILDREN(oid); 3525 3526 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "cntxt_id", CTLFLAG_RD, 3527 &eq->cntxt_id, 0, "SGE context id of the queue"); 3528 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cidx", 3529 CTLTYPE_INT | CTLFLAG_RD, &eq->cidx, 0, sysctl_uint16, "I", 3530 "consumer index"); 3531 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "pidx", 3532 CTLTYPE_INT | CTLFLAG_RD, &eq->pidx, 0, sysctl_uint16, "I", 3533 "producer index"); 3534 3535 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "txcsum", CTLFLAG_RD, 3536 &txq->txcsum, "# of times hardware assisted with checksum"); 3537 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "vlan_insertion", 3538 CTLFLAG_RD, &txq->vlan_insertion, 3539 "# of times hardware inserted 802.1Q tag"); 3540 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "tso_wrs", CTLFLAG_RD, 3541 &txq->tso_wrs, "# of TSO work requests"); 3542 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "imm_wrs", CTLFLAG_RD, 3543 &txq->imm_wrs, "# of work requests with immediate data"); 3544 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "sgl_wrs", CTLFLAG_RD, 3545 &txq->sgl_wrs, "# of work requests with direct SGL"); 3546 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "txpkt_wrs", CTLFLAG_RD, 3547 &txq->txpkt_wrs, "# of txpkt work requests (one pkt/WR)"); 3548 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "txpkts0_wrs", 3549 CTLFLAG_RD, &txq->txpkts0_wrs, 3550 "# of txpkts (type 0) work requests"); 3551 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "txpkts1_wrs", 3552 CTLFLAG_RD, &txq->txpkts1_wrs, 3553 "# of txpkts (type 1) work requests"); 3554 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "txpkts0_pkts", 3555 CTLFLAG_RD, &txq->txpkts0_pkts, 3556 "# of frames tx'd using type0 txpkts work requests"); 3557 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "txpkts1_pkts", 3558 CTLFLAG_RD, &txq->txpkts1_pkts, 3559 "# of frames tx'd using type1 txpkts work requests"); 3560 3561 SYSCTL_ADD_COUNTER_U64(&pi->ctx, children, OID_AUTO, "r_enqueues", 3562 CTLFLAG_RD, &txq->r->enqueues, 3563 "# of enqueues to the mp_ring for this queue"); 3564 SYSCTL_ADD_COUNTER_U64(&pi->ctx, children, OID_AUTO, "r_drops", 3565 CTLFLAG_RD, &txq->r->drops, 3566 "# of drops in the mp_ring for this queue"); 3567 SYSCTL_ADD_COUNTER_U64(&pi->ctx, children, OID_AUTO, "r_starts", 3568 CTLFLAG_RD, &txq->r->starts, 3569 "# of normal consumer starts in the mp_ring for this queue"); 3570 SYSCTL_ADD_COUNTER_U64(&pi->ctx, children, OID_AUTO, "r_stalls", 3571 CTLFLAG_RD, &txq->r->stalls, 3572 "# of consumer stalls in the mp_ring for this queue"); 3573 SYSCTL_ADD_COUNTER_U64(&pi->ctx, children, OID_AUTO, "r_restarts", 3574 CTLFLAG_RD, &txq->r->restarts, 3575 "# of consumer restarts in the mp_ring for this queue"); 3576 SYSCTL_ADD_COUNTER_U64(&pi->ctx, children, OID_AUTO, "r_abdications", 3577 CTLFLAG_RD, &txq->r->abdications, 3578 "# of consumer abdications in the mp_ring for this queue"); 3579 3580 return (0); 3581 } 3582 3583 static int 3584 free_txq(struct port_info *pi, struct sge_txq *txq) 3585 { 3586 int rc; 3587 struct adapter *sc = pi->adapter; 3588 struct sge_eq *eq = &txq->eq; 3589 3590 rc = free_eq(sc, eq); 3591 if (rc) 3592 return (rc); 3593 3594 sglist_free(txq->gl); 3595 free(txq->sdesc, M_CXGBE); 3596 mp_ring_free(txq->r); 3597 3598 bzero(txq, sizeof(*txq)); 3599 return (0); 3600 } 3601 3602 static void 3603 oneseg_dma_callback(void *arg, bus_dma_segment_t *segs, int nseg, int error) 3604 { 3605 bus_addr_t *ba = arg; 3606 3607 KASSERT(nseg == 1, 3608 ("%s meant for single segment mappings only.", __func__)); 3609 3610 *ba = error ? 0 : segs->ds_addr; 3611 } 3612 3613 static inline void 3614 ring_fl_db(struct adapter *sc, struct sge_fl *fl) 3615 { 3616 uint32_t n, v; 3617 3618 n = IDXDIFF(fl->pidx / 8, fl->dbidx, fl->sidx); 3619 MPASS(n > 0); 3620 3621 wmb(); 3622 v = fl->dbval | V_PIDX(n); 3623 if (fl->udb) 3624 *fl->udb = htole32(v); 3625 else 3626 t4_write_reg(sc, MYPF_REG(A_SGE_PF_KDOORBELL), v); 3627 IDXINCR(fl->dbidx, n, fl->sidx); 3628 } 3629 3630 /* 3631 * Fills up the freelist by allocating upto 'n' buffers. Buffers that are 3632 * recycled do not count towards this allocation budget. 3633 * 3634 * Returns non-zero to indicate that this freelist should be added to the list 3635 * of starving freelists. 3636 */ 3637 static int 3638 refill_fl(struct adapter *sc, struct sge_fl *fl, int n) 3639 { 3640 __be64 *d; 3641 struct fl_sdesc *sd; 3642 uintptr_t pa; 3643 caddr_t cl; 3644 struct cluster_layout *cll; 3645 struct sw_zone_info *swz; 3646 struct cluster_metadata *clm; 3647 uint16_t max_pidx; 3648 uint16_t hw_cidx = fl->hw_cidx; /* stable snapshot */ 3649 3650 FL_LOCK_ASSERT_OWNED(fl); 3651 3652 /* 3653 * We always stop at the begining of the hardware descriptor that's just 3654 * before the one with the hw cidx. This is to avoid hw pidx = hw cidx, 3655 * which would mean an empty freelist to the chip. 3656 */ 3657 max_pidx = __predict_false(hw_cidx == 0) ? fl->sidx - 1 : hw_cidx - 1; 3658 if (fl->pidx == max_pidx * 8) 3659 return (0); 3660 3661 d = &fl->desc[fl->pidx]; 3662 sd = &fl->sdesc[fl->pidx]; 3663 cll = &fl->cll_def; /* default layout */ 3664 swz = &sc->sge.sw_zone_info[cll->zidx]; 3665 3666 while (n > 0) { 3667 3668 if (sd->cl != NULL) { 3669 3670 if (sd->nmbuf == 0) { 3671 /* 3672 * Fast recycle without involving any atomics on 3673 * the cluster's metadata (if the cluster has 3674 * metadata). This happens when all frames 3675 * received in the cluster were small enough to 3676 * fit within a single mbuf each. 3677 */ 3678 fl->cl_fast_recycled++; 3679 #ifdef INVARIANTS 3680 clm = cl_metadata(sc, fl, &sd->cll, sd->cl); 3681 if (clm != NULL) 3682 MPASS(clm->refcount == 1); 3683 #endif 3684 goto recycled_fast; 3685 } 3686 3687 /* 3688 * Cluster is guaranteed to have metadata. Clusters 3689 * without metadata always take the fast recycle path 3690 * when they're recycled. 3691 */ 3692 clm = cl_metadata(sc, fl, &sd->cll, sd->cl); 3693 MPASS(clm != NULL); 3694 3695 if (atomic_fetchadd_int(&clm->refcount, -1) == 1) { 3696 fl->cl_recycled++; 3697 counter_u64_add(extfree_rels, 1); 3698 goto recycled; 3699 } 3700 sd->cl = NULL; /* gave up my reference */ 3701 } 3702 MPASS(sd->cl == NULL); 3703 alloc: 3704 cl = uma_zalloc(swz->zone, M_NOWAIT); 3705 if (__predict_false(cl == NULL)) { 3706 if (cll == &fl->cll_alt || fl->cll_alt.zidx == -1 || 3707 fl->cll_def.zidx == fl->cll_alt.zidx) 3708 break; 3709 3710 /* fall back to the safe zone */ 3711 cll = &fl->cll_alt; 3712 swz = &sc->sge.sw_zone_info[cll->zidx]; 3713 goto alloc; 3714 } 3715 fl->cl_allocated++; 3716 n--; 3717 3718 pa = pmap_kextract((vm_offset_t)cl); 3719 pa += cll->region1; 3720 sd->cl = cl; 3721 sd->cll = *cll; 3722 *d = htobe64(pa | cll->hwidx); 3723 clm = cl_metadata(sc, fl, cll, cl); 3724 if (clm != NULL) { 3725 recycled: 3726 #ifdef INVARIANTS 3727 clm->sd = sd; 3728 #endif 3729 clm->refcount = 1; 3730 } 3731 sd->nmbuf = 0; 3732 recycled_fast: 3733 d++; 3734 sd++; 3735 if (__predict_false(++fl->pidx % 8 == 0)) { 3736 uint16_t pidx = fl->pidx / 8; 3737 3738 if (__predict_false(pidx == fl->sidx)) { 3739 fl->pidx = 0; 3740 pidx = 0; 3741 sd = fl->sdesc; 3742 d = fl->desc; 3743 } 3744 if (pidx == max_pidx) 3745 break; 3746 3747 if (IDXDIFF(pidx, fl->dbidx, fl->sidx) >= 4) 3748 ring_fl_db(sc, fl); 3749 } 3750 } 3751 3752 if (fl->pidx / 8 != fl->dbidx) 3753 ring_fl_db(sc, fl); 3754 3755 return (FL_RUNNING_LOW(fl) && !(fl->flags & FL_STARVING)); 3756 } 3757 3758 /* 3759 * Attempt to refill all starving freelists. 3760 */ 3761 static void 3762 refill_sfl(void *arg) 3763 { 3764 struct adapter *sc = arg; 3765 struct sge_fl *fl, *fl_temp; 3766 3767 mtx_lock(&sc->sfl_lock); 3768 TAILQ_FOREACH_SAFE(fl, &sc->sfl, link, fl_temp) { 3769 FL_LOCK(fl); 3770 refill_fl(sc, fl, 64); 3771 if (FL_NOT_RUNNING_LOW(fl) || fl->flags & FL_DOOMED) { 3772 TAILQ_REMOVE(&sc->sfl, fl, link); 3773 fl->flags &= ~FL_STARVING; 3774 } 3775 FL_UNLOCK(fl); 3776 } 3777 3778 if (!TAILQ_EMPTY(&sc->sfl)) 3779 callout_schedule(&sc->sfl_callout, hz / 5); 3780 mtx_unlock(&sc->sfl_lock); 3781 } 3782 3783 static int 3784 alloc_fl_sdesc(struct sge_fl *fl) 3785 { 3786 3787 fl->sdesc = malloc(fl->sidx * 8 * sizeof(struct fl_sdesc), M_CXGBE, 3788 M_ZERO | M_WAITOK); 3789 3790 return (0); 3791 } 3792 3793 static void 3794 free_fl_sdesc(struct adapter *sc, struct sge_fl *fl) 3795 { 3796 struct fl_sdesc *sd; 3797 struct cluster_metadata *clm; 3798 struct cluster_layout *cll; 3799 int i; 3800 3801 sd = fl->sdesc; 3802 for (i = 0; i < fl->sidx * 8; i++, sd++) { 3803 if (sd->cl == NULL) 3804 continue; 3805 3806 cll = &sd->cll; 3807 clm = cl_metadata(sc, fl, cll, sd->cl); 3808 if (sd->nmbuf == 0) 3809 uma_zfree(sc->sge.sw_zone_info[cll->zidx].zone, sd->cl); 3810 else if (clm && atomic_fetchadd_int(&clm->refcount, -1) == 1) { 3811 uma_zfree(sc->sge.sw_zone_info[cll->zidx].zone, sd->cl); 3812 counter_u64_add(extfree_rels, 1); 3813 } 3814 sd->cl = NULL; 3815 } 3816 3817 free(fl->sdesc, M_CXGBE); 3818 fl->sdesc = NULL; 3819 } 3820 3821 static inline void 3822 get_pkt_gl(struct mbuf *m, struct sglist *gl) 3823 { 3824 int rc; 3825 3826 M_ASSERTPKTHDR(m); 3827 3828 sglist_reset(gl); 3829 rc = sglist_append_mbuf(gl, m); 3830 if (__predict_false(rc != 0)) { 3831 panic("%s: mbuf %p (%d segs) was vetted earlier but now fails " 3832 "with %d.", __func__, m, mbuf_nsegs(m), rc); 3833 } 3834 3835 KASSERT(gl->sg_nseg == mbuf_nsegs(m), 3836 ("%s: nsegs changed for mbuf %p from %d to %d", __func__, m, 3837 mbuf_nsegs(m), gl->sg_nseg)); 3838 KASSERT(gl->sg_nseg > 0 && 3839 gl->sg_nseg <= (needs_tso(m) ? TX_SGL_SEGS_TSO : TX_SGL_SEGS), 3840 ("%s: %d segments, should have been 1 <= nsegs <= %d", __func__, 3841 gl->sg_nseg, needs_tso(m) ? TX_SGL_SEGS_TSO : TX_SGL_SEGS)); 3842 } 3843 3844 /* 3845 * len16 for a txpkt WR with a GL. Includes the firmware work request header. 3846 */ 3847 static inline u_int 3848 txpkt_len16(u_int nsegs, u_int tso) 3849 { 3850 u_int n; 3851 3852 MPASS(nsegs > 0); 3853 3854 nsegs--; /* first segment is part of ulptx_sgl */ 3855 n = sizeof(struct fw_eth_tx_pkt_wr) + sizeof(struct cpl_tx_pkt_core) + 3856 sizeof(struct ulptx_sgl) + 8 * ((3 * nsegs) / 2 + (nsegs & 1)); 3857 if (tso) 3858 n += sizeof(struct cpl_tx_pkt_lso_core); 3859 3860 return (howmany(n, 16)); 3861 } 3862 3863 /* 3864 * len16 for a txpkts type 0 WR with a GL. Does not include the firmware work 3865 * request header. 3866 */ 3867 static inline u_int 3868 txpkts0_len16(u_int nsegs) 3869 { 3870 u_int n; 3871 3872 MPASS(nsegs > 0); 3873 3874 nsegs--; /* first segment is part of ulptx_sgl */ 3875 n = sizeof(struct ulp_txpkt) + sizeof(struct ulptx_idata) + 3876 sizeof(struct cpl_tx_pkt_core) + sizeof(struct ulptx_sgl) + 3877 8 * ((3 * nsegs) / 2 + (nsegs & 1)); 3878 3879 return (howmany(n, 16)); 3880 } 3881 3882 /* 3883 * len16 for a txpkts type 1 WR with a GL. Does not include the firmware work 3884 * request header. 3885 */ 3886 static inline u_int 3887 txpkts1_len16(void) 3888 { 3889 u_int n; 3890 3891 n = sizeof(struct cpl_tx_pkt_core) + sizeof(struct ulptx_sgl); 3892 3893 return (howmany(n, 16)); 3894 } 3895 3896 static inline u_int 3897 imm_payload(u_int ndesc) 3898 { 3899 u_int n; 3900 3901 n = ndesc * EQ_ESIZE - sizeof(struct fw_eth_tx_pkt_wr) - 3902 sizeof(struct cpl_tx_pkt_core); 3903 3904 return (n); 3905 } 3906 3907 /* 3908 * Write a txpkt WR for this packet to the hardware descriptors, update the 3909 * software descriptor, and advance the pidx. It is guaranteed that enough 3910 * descriptors are available. 3911 * 3912 * The return value is the # of hardware descriptors used. 3913 */ 3914 static u_int 3915 write_txpkt_wr(struct sge_txq *txq, struct fw_eth_tx_pkt_wr *wr, 3916 struct mbuf *m0, u_int available) 3917 { 3918 struct sge_eq *eq = &txq->eq; 3919 struct tx_sdesc *txsd; 3920 struct cpl_tx_pkt_core *cpl; 3921 uint32_t ctrl; /* used in many unrelated places */ 3922 uint64_t ctrl1; 3923 int len16, ndesc, pktlen, nsegs; 3924 caddr_t dst; 3925 3926 TXQ_LOCK_ASSERT_OWNED(txq); 3927 M_ASSERTPKTHDR(m0); 3928 MPASS(available > 0 && available < eq->sidx); 3929 3930 len16 = mbuf_len16(m0); 3931 nsegs = mbuf_nsegs(m0); 3932 pktlen = m0->m_pkthdr.len; 3933 ctrl = sizeof(struct cpl_tx_pkt_core); 3934 if (needs_tso(m0)) 3935 ctrl += sizeof(struct cpl_tx_pkt_lso_core); 3936 else if (pktlen <= imm_payload(2) && available >= 2) { 3937 /* Immediate data. Recalculate len16 and set nsegs to 0. */ 3938 ctrl += pktlen; 3939 len16 = howmany(sizeof(struct fw_eth_tx_pkt_wr) + 3940 sizeof(struct cpl_tx_pkt_core) + pktlen, 16); 3941 nsegs = 0; 3942 } 3943 ndesc = howmany(len16, EQ_ESIZE / 16); 3944 MPASS(ndesc <= available); 3945 3946 /* Firmware work request header */ 3947 MPASS(wr == (void *)&eq->desc[eq->pidx]); 3948 wr->op_immdlen = htobe32(V_FW_WR_OP(FW_ETH_TX_PKT_WR) | 3949 V_FW_ETH_TX_PKT_WR_IMMDLEN(ctrl)); 3950 3951 ctrl = V_FW_WR_LEN16(len16); 3952 wr->equiq_to_len16 = htobe32(ctrl); 3953 wr->r3 = 0; 3954 3955 if (needs_tso(m0)) { 3956 struct cpl_tx_pkt_lso_core *lso = (void *)(wr + 1); 3957 3958 KASSERT(m0->m_pkthdr.l2hlen > 0 && m0->m_pkthdr.l3hlen > 0 && 3959 m0->m_pkthdr.l4hlen > 0, 3960 ("%s: mbuf %p needs TSO but missing header lengths", 3961 __func__, m0)); 3962 3963 ctrl = V_LSO_OPCODE(CPL_TX_PKT_LSO) | F_LSO_FIRST_SLICE | 3964 F_LSO_LAST_SLICE | V_LSO_IPHDR_LEN(m0->m_pkthdr.l3hlen >> 2) 3965 | V_LSO_TCPHDR_LEN(m0->m_pkthdr.l4hlen >> 2); 3966 if (m0->m_pkthdr.l2hlen == sizeof(struct ether_vlan_header)) 3967 ctrl |= V_LSO_ETHHDR_LEN(1); 3968 if (m0->m_pkthdr.l3hlen == sizeof(struct ip6_hdr)) 3969 ctrl |= F_LSO_IPV6; 3970 3971 lso->lso_ctrl = htobe32(ctrl); 3972 lso->ipid_ofst = htobe16(0); 3973 lso->mss = htobe16(m0->m_pkthdr.tso_segsz); 3974 lso->seqno_offset = htobe32(0); 3975 lso->len = htobe32(pktlen); 3976 3977 cpl = (void *)(lso + 1); 3978 3979 txq->tso_wrs++; 3980 } else 3981 cpl = (void *)(wr + 1); 3982 3983 /* Checksum offload */ 3984 ctrl1 = 0; 3985 if (needs_l3_csum(m0) == 0) 3986 ctrl1 |= F_TXPKT_IPCSUM_DIS; 3987 if (needs_l4_csum(m0) == 0) 3988 ctrl1 |= F_TXPKT_L4CSUM_DIS; 3989 if (m0->m_pkthdr.csum_flags & (CSUM_IP | CSUM_TCP | CSUM_UDP | 3990 CSUM_UDP_IPV6 | CSUM_TCP_IPV6 | CSUM_TSO)) 3991 txq->txcsum++; /* some hardware assistance provided */ 3992 3993 /* VLAN tag insertion */ 3994 if (needs_vlan_insertion(m0)) { 3995 ctrl1 |= F_TXPKT_VLAN_VLD | V_TXPKT_VLAN(m0->m_pkthdr.ether_vtag); 3996 txq->vlan_insertion++; 3997 } 3998 3999 /* CPL header */ 4000 cpl->ctrl0 = txq->cpl_ctrl0; 4001 cpl->pack = 0; 4002 cpl->len = htobe16(pktlen); 4003 cpl->ctrl1 = htobe64(ctrl1); 4004 4005 /* SGL */ 4006 dst = (void *)(cpl + 1); 4007 if (nsegs > 0) { 4008 4009 write_gl_to_txd(txq, m0, &dst, eq->sidx - ndesc < eq->pidx); 4010 txq->sgl_wrs++; 4011 } else { 4012 struct mbuf *m; 4013 4014 for (m = m0; m != NULL; m = m->m_next) { 4015 copy_to_txd(eq, mtod(m, caddr_t), &dst, m->m_len); 4016 #ifdef INVARIANTS 4017 pktlen -= m->m_len; 4018 #endif 4019 } 4020 #ifdef INVARIANTS 4021 KASSERT(pktlen == 0, ("%s: %d bytes left.", __func__, pktlen)); 4022 #endif 4023 txq->imm_wrs++; 4024 } 4025 4026 txq->txpkt_wrs++; 4027 4028 txsd = &txq->sdesc[eq->pidx]; 4029 txsd->m = m0; 4030 txsd->desc_used = ndesc; 4031 4032 return (ndesc); 4033 } 4034 4035 static int 4036 try_txpkts(struct mbuf *m, struct mbuf *n, struct txpkts *txp, u_int available) 4037 { 4038 u_int needed, nsegs1, nsegs2, l1, l2; 4039 4040 if (cannot_use_txpkts(m) || cannot_use_txpkts(n)) 4041 return (1); 4042 4043 nsegs1 = mbuf_nsegs(m); 4044 nsegs2 = mbuf_nsegs(n); 4045 if (nsegs1 + nsegs2 == 2) { 4046 txp->wr_type = 1; 4047 l1 = l2 = txpkts1_len16(); 4048 } else { 4049 txp->wr_type = 0; 4050 l1 = txpkts0_len16(nsegs1); 4051 l2 = txpkts0_len16(nsegs2); 4052 } 4053 txp->len16 = howmany(sizeof(struct fw_eth_tx_pkts_wr), 16) + l1 + l2; 4054 needed = howmany(txp->len16, EQ_ESIZE / 16); 4055 if (needed > SGE_MAX_WR_NDESC || needed > available) 4056 return (1); 4057 4058 txp->plen = m->m_pkthdr.len + n->m_pkthdr.len; 4059 if (txp->plen > 65535) 4060 return (1); 4061 4062 txp->npkt = 2; 4063 set_mbuf_len16(m, l1); 4064 set_mbuf_len16(n, l2); 4065 4066 return (0); 4067 } 4068 4069 static int 4070 add_to_txpkts(struct mbuf *m, struct txpkts *txp, u_int available) 4071 { 4072 u_int plen, len16, needed, nsegs; 4073 4074 MPASS(txp->wr_type == 0 || txp->wr_type == 1); 4075 4076 nsegs = mbuf_nsegs(m); 4077 if (needs_tso(m) || (txp->wr_type == 1 && nsegs != 1)) 4078 return (1); 4079 4080 plen = txp->plen + m->m_pkthdr.len; 4081 if (plen > 65535) 4082 return (1); 4083 4084 if (txp->wr_type == 0) 4085 len16 = txpkts0_len16(nsegs); 4086 else 4087 len16 = txpkts1_len16(); 4088 needed = howmany(txp->len16 + len16, EQ_ESIZE / 16); 4089 if (needed > SGE_MAX_WR_NDESC || needed > available) 4090 return (1); 4091 4092 txp->npkt++; 4093 txp->plen = plen; 4094 txp->len16 += len16; 4095 set_mbuf_len16(m, len16); 4096 4097 return (0); 4098 } 4099 4100 /* 4101 * Write a txpkts WR for the packets in txp to the hardware descriptors, update 4102 * the software descriptor, and advance the pidx. It is guaranteed that enough 4103 * descriptors are available. 4104 * 4105 * The return value is the # of hardware descriptors used. 4106 */ 4107 static u_int 4108 write_txpkts_wr(struct sge_txq *txq, struct fw_eth_tx_pkts_wr *wr, 4109 struct mbuf *m0, const struct txpkts *txp, u_int available) 4110 { 4111 struct sge_eq *eq = &txq->eq; 4112 struct tx_sdesc *txsd; 4113 struct cpl_tx_pkt_core *cpl; 4114 uint32_t ctrl; 4115 uint64_t ctrl1; 4116 int ndesc, checkwrap; 4117 struct mbuf *m; 4118 void *flitp; 4119 4120 TXQ_LOCK_ASSERT_OWNED(txq); 4121 MPASS(txp->npkt > 0); 4122 MPASS(txp->plen < 65536); 4123 MPASS(m0 != NULL); 4124 MPASS(m0->m_nextpkt != NULL); 4125 MPASS(txp->len16 <= howmany(SGE_MAX_WR_LEN, 16)); 4126 MPASS(available > 0 && available < eq->sidx); 4127 4128 ndesc = howmany(txp->len16, EQ_ESIZE / 16); 4129 MPASS(ndesc <= available); 4130 4131 MPASS(wr == (void *)&eq->desc[eq->pidx]); 4132 wr->op_pkd = htobe32(V_FW_WR_OP(FW_ETH_TX_PKTS_WR)); 4133 ctrl = V_FW_WR_LEN16(txp->len16); 4134 wr->equiq_to_len16 = htobe32(ctrl); 4135 wr->plen = htobe16(txp->plen); 4136 wr->npkt = txp->npkt; 4137 wr->r3 = 0; 4138 wr->type = txp->wr_type; 4139 flitp = wr + 1; 4140 4141 /* 4142 * At this point we are 16B into a hardware descriptor. If checkwrap is 4143 * set then we know the WR is going to wrap around somewhere. We'll 4144 * check for that at appropriate points. 4145 */ 4146 checkwrap = eq->sidx - ndesc < eq->pidx; 4147 for (m = m0; m != NULL; m = m->m_nextpkt) { 4148 if (txp->wr_type == 0) { 4149 struct ulp_txpkt *ulpmc; 4150 struct ulptx_idata *ulpsc; 4151 4152 /* ULP master command */ 4153 ulpmc = flitp; 4154 ulpmc->cmd_dest = htobe32(V_ULPTX_CMD(ULP_TX_PKT) | 4155 V_ULP_TXPKT_DEST(0) | V_ULP_TXPKT_FID(eq->iqid)); 4156 ulpmc->len = htobe32(mbuf_len16(m)); 4157 4158 /* ULP subcommand */ 4159 ulpsc = (void *)(ulpmc + 1); 4160 ulpsc->cmd_more = htobe32(V_ULPTX_CMD(ULP_TX_SC_IMM) | 4161 F_ULP_TX_SC_MORE); 4162 ulpsc->len = htobe32(sizeof(struct cpl_tx_pkt_core)); 4163 4164 cpl = (void *)(ulpsc + 1); 4165 if (checkwrap && 4166 (uintptr_t)cpl == (uintptr_t)&eq->desc[eq->sidx]) 4167 cpl = (void *)&eq->desc[0]; 4168 txq->txpkts0_pkts += txp->npkt; 4169 txq->txpkts0_wrs++; 4170 } else { 4171 cpl = flitp; 4172 txq->txpkts1_pkts += txp->npkt; 4173 txq->txpkts1_wrs++; 4174 } 4175 4176 /* Checksum offload */ 4177 ctrl1 = 0; 4178 if (needs_l3_csum(m) == 0) 4179 ctrl1 |= F_TXPKT_IPCSUM_DIS; 4180 if (needs_l4_csum(m) == 0) 4181 ctrl1 |= F_TXPKT_L4CSUM_DIS; 4182 if (m->m_pkthdr.csum_flags & (CSUM_IP | CSUM_TCP | CSUM_UDP | 4183 CSUM_UDP_IPV6 | CSUM_TCP_IPV6 | CSUM_TSO)) 4184 txq->txcsum++; /* some hardware assistance provided */ 4185 4186 /* VLAN tag insertion */ 4187 if (needs_vlan_insertion(m)) { 4188 ctrl1 |= F_TXPKT_VLAN_VLD | 4189 V_TXPKT_VLAN(m->m_pkthdr.ether_vtag); 4190 txq->vlan_insertion++; 4191 } 4192 4193 /* CPL header */ 4194 cpl->ctrl0 = txq->cpl_ctrl0; 4195 cpl->pack = 0; 4196 cpl->len = htobe16(m->m_pkthdr.len); 4197 cpl->ctrl1 = htobe64(ctrl1); 4198 4199 flitp = cpl + 1; 4200 if (checkwrap && 4201 (uintptr_t)flitp == (uintptr_t)&eq->desc[eq->sidx]) 4202 flitp = (void *)&eq->desc[0]; 4203 4204 write_gl_to_txd(txq, m, (caddr_t *)(&flitp), checkwrap); 4205 4206 } 4207 4208 txsd = &txq->sdesc[eq->pidx]; 4209 txsd->m = m0; 4210 txsd->desc_used = ndesc; 4211 4212 return (ndesc); 4213 } 4214 4215 /* 4216 * If the SGL ends on an address that is not 16 byte aligned, this function will 4217 * add a 0 filled flit at the end. 4218 */ 4219 static void 4220 write_gl_to_txd(struct sge_txq *txq, struct mbuf *m, caddr_t *to, int checkwrap) 4221 { 4222 struct sge_eq *eq = &txq->eq; 4223 struct sglist *gl = txq->gl; 4224 struct sglist_seg *seg; 4225 __be64 *flitp, *wrap; 4226 struct ulptx_sgl *usgl; 4227 int i, nflits, nsegs; 4228 4229 KASSERT(((uintptr_t)(*to) & 0xf) == 0, 4230 ("%s: SGL must start at a 16 byte boundary: %p", __func__, *to)); 4231 MPASS((uintptr_t)(*to) >= (uintptr_t)&eq->desc[0]); 4232 MPASS((uintptr_t)(*to) < (uintptr_t)&eq->desc[eq->sidx]); 4233 4234 get_pkt_gl(m, gl); 4235 nsegs = gl->sg_nseg; 4236 MPASS(nsegs > 0); 4237 4238 nflits = (3 * (nsegs - 1)) / 2 + ((nsegs - 1) & 1) + 2; 4239 flitp = (__be64 *)(*to); 4240 wrap = (__be64 *)(&eq->desc[eq->sidx]); 4241 seg = &gl->sg_segs[0]; 4242 usgl = (void *)flitp; 4243 4244 /* 4245 * We start at a 16 byte boundary somewhere inside the tx descriptor 4246 * ring, so we're at least 16 bytes away from the status page. There is 4247 * no chance of a wrap around in the middle of usgl (which is 16 bytes). 4248 */ 4249 4250 usgl->cmd_nsge = htobe32(V_ULPTX_CMD(ULP_TX_SC_DSGL) | 4251 V_ULPTX_NSGE(nsegs)); 4252 usgl->len0 = htobe32(seg->ss_len); 4253 usgl->addr0 = htobe64(seg->ss_paddr); 4254 seg++; 4255 4256 if (checkwrap == 0 || (uintptr_t)(flitp + nflits) <= (uintptr_t)wrap) { 4257 4258 /* Won't wrap around at all */ 4259 4260 for (i = 0; i < nsegs - 1; i++, seg++) { 4261 usgl->sge[i / 2].len[i & 1] = htobe32(seg->ss_len); 4262 usgl->sge[i / 2].addr[i & 1] = htobe64(seg->ss_paddr); 4263 } 4264 if (i & 1) 4265 usgl->sge[i / 2].len[1] = htobe32(0); 4266 flitp += nflits; 4267 } else { 4268 4269 /* Will wrap somewhere in the rest of the SGL */ 4270 4271 /* 2 flits already written, write the rest flit by flit */ 4272 flitp = (void *)(usgl + 1); 4273 for (i = 0; i < nflits - 2; i++) { 4274 if (flitp == wrap) 4275 flitp = (void *)eq->desc; 4276 *flitp++ = get_flit(seg, nsegs - 1, i); 4277 } 4278 } 4279 4280 if (nflits & 1) { 4281 MPASS(((uintptr_t)flitp) & 0xf); 4282 *flitp++ = 0; 4283 } 4284 4285 MPASS((((uintptr_t)flitp) & 0xf) == 0); 4286 if (__predict_false(flitp == wrap)) 4287 *to = (void *)eq->desc; 4288 else 4289 *to = (void *)flitp; 4290 } 4291 4292 static inline void 4293 copy_to_txd(struct sge_eq *eq, caddr_t from, caddr_t *to, int len) 4294 { 4295 4296 MPASS((uintptr_t)(*to) >= (uintptr_t)&eq->desc[0]); 4297 MPASS((uintptr_t)(*to) < (uintptr_t)&eq->desc[eq->sidx]); 4298 4299 if (__predict_true((uintptr_t)(*to) + len <= 4300 (uintptr_t)&eq->desc[eq->sidx])) { 4301 bcopy(from, *to, len); 4302 (*to) += len; 4303 } else { 4304 int portion = (uintptr_t)&eq->desc[eq->sidx] - (uintptr_t)(*to); 4305 4306 bcopy(from, *to, portion); 4307 from += portion; 4308 portion = len - portion; /* remaining */ 4309 bcopy(from, (void *)eq->desc, portion); 4310 (*to) = (caddr_t)eq->desc + portion; 4311 } 4312 } 4313 4314 static inline void 4315 ring_eq_db(struct adapter *sc, struct sge_eq *eq, u_int n) 4316 { 4317 u_int db; 4318 4319 MPASS(n > 0); 4320 4321 db = eq->doorbells; 4322 if (n > 1) 4323 clrbit(&db, DOORBELL_WCWR); 4324 wmb(); 4325 4326 switch (ffs(db) - 1) { 4327 case DOORBELL_UDB: 4328 *eq->udb = htole32(V_QID(eq->udb_qid) | V_PIDX(n)); 4329 break; 4330 4331 case DOORBELL_WCWR: { 4332 volatile uint64_t *dst, *src; 4333 int i; 4334 4335 /* 4336 * Queues whose 128B doorbell segment fits in the page do not 4337 * use relative qid (udb_qid is always 0). Only queues with 4338 * doorbell segments can do WCWR. 4339 */ 4340 KASSERT(eq->udb_qid == 0 && n == 1, 4341 ("%s: inappropriate doorbell (0x%x, %d, %d) for eq %p", 4342 __func__, eq->doorbells, n, eq->dbidx, eq)); 4343 4344 dst = (volatile void *)((uintptr_t)eq->udb + UDBS_WR_OFFSET - 4345 UDBS_DB_OFFSET); 4346 i = eq->dbidx; 4347 src = (void *)&eq->desc[i]; 4348 while (src != (void *)&eq->desc[i + 1]) 4349 *dst++ = *src++; 4350 wmb(); 4351 break; 4352 } 4353 4354 case DOORBELL_UDBWC: 4355 *eq->udb = htole32(V_QID(eq->udb_qid) | V_PIDX(n)); 4356 wmb(); 4357 break; 4358 4359 case DOORBELL_KDB: 4360 t4_write_reg(sc, MYPF_REG(A_SGE_PF_KDOORBELL), 4361 V_QID(eq->cntxt_id) | V_PIDX(n)); 4362 break; 4363 } 4364 4365 IDXINCR(eq->dbidx, n, eq->sidx); 4366 } 4367 4368 static inline u_int 4369 reclaimable_tx_desc(struct sge_eq *eq) 4370 { 4371 uint16_t hw_cidx; 4372 4373 hw_cidx = read_hw_cidx(eq); 4374 return (IDXDIFF(hw_cidx, eq->cidx, eq->sidx)); 4375 } 4376 4377 static inline u_int 4378 total_available_tx_desc(struct sge_eq *eq) 4379 { 4380 uint16_t hw_cidx, pidx; 4381 4382 hw_cidx = read_hw_cidx(eq); 4383 pidx = eq->pidx; 4384 4385 if (pidx == hw_cidx) 4386 return (eq->sidx - 1); 4387 else 4388 return (IDXDIFF(hw_cidx, pidx, eq->sidx) - 1); 4389 } 4390 4391 static inline uint16_t 4392 read_hw_cidx(struct sge_eq *eq) 4393 { 4394 struct sge_qstat *spg = (void *)&eq->desc[eq->sidx]; 4395 uint16_t cidx = spg->cidx; /* stable snapshot */ 4396 4397 return (be16toh(cidx)); 4398 } 4399 4400 /* 4401 * Reclaim 'n' descriptors approximately. 4402 */ 4403 static u_int 4404 reclaim_tx_descs(struct sge_txq *txq, u_int n) 4405 { 4406 struct tx_sdesc *txsd; 4407 struct sge_eq *eq = &txq->eq; 4408 u_int can_reclaim, reclaimed; 4409 4410 TXQ_LOCK_ASSERT_OWNED(txq); 4411 MPASS(n > 0); 4412 4413 reclaimed = 0; 4414 can_reclaim = reclaimable_tx_desc(eq); 4415 while (can_reclaim && reclaimed < n) { 4416 int ndesc; 4417 struct mbuf *m, *nextpkt; 4418 4419 txsd = &txq->sdesc[eq->cidx]; 4420 ndesc = txsd->desc_used; 4421 4422 /* Firmware doesn't return "partial" credits. */ 4423 KASSERT(can_reclaim >= ndesc, 4424 ("%s: unexpected number of credits: %d, %d", 4425 __func__, can_reclaim, ndesc)); 4426 4427 for (m = txsd->m; m != NULL; m = nextpkt) { 4428 nextpkt = m->m_nextpkt; 4429 m->m_nextpkt = NULL; 4430 m_freem(m); 4431 } 4432 reclaimed += ndesc; 4433 can_reclaim -= ndesc; 4434 IDXINCR(eq->cidx, ndesc, eq->sidx); 4435 } 4436 4437 return (reclaimed); 4438 } 4439 4440 static void 4441 tx_reclaim(void *arg, int n) 4442 { 4443 struct sge_txq *txq = arg; 4444 struct sge_eq *eq = &txq->eq; 4445 4446 do { 4447 if (TXQ_TRYLOCK(txq) == 0) 4448 break; 4449 n = reclaim_tx_descs(txq, 32); 4450 if (eq->cidx == eq->pidx) 4451 eq->equeqidx = eq->pidx; 4452 TXQ_UNLOCK(txq); 4453 } while (n > 0); 4454 } 4455 4456 static __be64 4457 get_flit(struct sglist_seg *segs, int nsegs, int idx) 4458 { 4459 int i = (idx / 3) * 2; 4460 4461 switch (idx % 3) { 4462 case 0: { 4463 __be64 rc; 4464 4465 rc = htobe32(segs[i].ss_len); 4466 if (i + 1 < nsegs) 4467 rc |= (uint64_t)htobe32(segs[i + 1].ss_len) << 32; 4468 4469 return (rc); 4470 } 4471 case 1: 4472 return (htobe64(segs[i].ss_paddr)); 4473 case 2: 4474 return (htobe64(segs[i + 1].ss_paddr)); 4475 } 4476 4477 return (0); 4478 } 4479 4480 static void 4481 find_best_refill_source(struct adapter *sc, struct sge_fl *fl, int maxp) 4482 { 4483 int8_t zidx, hwidx, idx; 4484 uint16_t region1, region3; 4485 int spare, spare_needed, n; 4486 struct sw_zone_info *swz; 4487 struct hw_buf_info *hwb, *hwb_list = &sc->sge.hw_buf_info[0]; 4488 4489 /* 4490 * Buffer Packing: Look for PAGE_SIZE or larger zone which has a bufsize 4491 * large enough for the max payload and cluster metadata. Otherwise 4492 * settle for the largest bufsize that leaves enough room in the cluster 4493 * for metadata. 4494 * 4495 * Without buffer packing: Look for the smallest zone which has a 4496 * bufsize large enough for the max payload. Settle for the largest 4497 * bufsize available if there's nothing big enough for max payload. 4498 */ 4499 spare_needed = fl->flags & FL_BUF_PACKING ? CL_METADATA_SIZE : 0; 4500 swz = &sc->sge.sw_zone_info[0]; 4501 hwidx = -1; 4502 for (zidx = 0; zidx < SW_ZONE_SIZES; zidx++, swz++) { 4503 if (swz->size > largest_rx_cluster) { 4504 if (__predict_true(hwidx != -1)) 4505 break; 4506 4507 /* 4508 * This is a misconfiguration. largest_rx_cluster is 4509 * preventing us from finding a refill source. See 4510 * dev.t5nex.<n>.buffer_sizes to figure out why. 4511 */ 4512 device_printf(sc->dev, "largest_rx_cluster=%u leaves no" 4513 " refill source for fl %p (dma %u). Ignored.\n", 4514 largest_rx_cluster, fl, maxp); 4515 } 4516 for (idx = swz->head_hwidx; idx != -1; idx = hwb->next) { 4517 hwb = &hwb_list[idx]; 4518 spare = swz->size - hwb->size; 4519 if (spare < spare_needed) 4520 continue; 4521 4522 hwidx = idx; /* best option so far */ 4523 if (hwb->size >= maxp) { 4524 4525 if ((fl->flags & FL_BUF_PACKING) == 0) 4526 goto done; /* stop looking (not packing) */ 4527 4528 if (swz->size >= safest_rx_cluster) 4529 goto done; /* stop looking (packing) */ 4530 } 4531 break; /* keep looking, next zone */ 4532 } 4533 } 4534 done: 4535 /* A usable hwidx has been located. */ 4536 MPASS(hwidx != -1); 4537 hwb = &hwb_list[hwidx]; 4538 zidx = hwb->zidx; 4539 swz = &sc->sge.sw_zone_info[zidx]; 4540 region1 = 0; 4541 region3 = swz->size - hwb->size; 4542 4543 /* 4544 * Stay within this zone and see if there is a better match when mbuf 4545 * inlining is allowed. Remember that the hwidx's are sorted in 4546 * decreasing order of size (so in increasing order of spare area). 4547 */ 4548 for (idx = hwidx; idx != -1; idx = hwb->next) { 4549 hwb = &hwb_list[idx]; 4550 spare = swz->size - hwb->size; 4551 4552 if (allow_mbufs_in_cluster == 0 || hwb->size < maxp) 4553 break; 4554 4555 /* 4556 * Do not inline mbufs if doing so would violate the pad/pack 4557 * boundary alignment requirement. 4558 */ 4559 if (fl_pad && (MSIZE % sc->sge.pad_boundary) != 0) 4560 continue; 4561 if (fl->flags & FL_BUF_PACKING && 4562 (MSIZE % sc->sge.pack_boundary) != 0) 4563 continue; 4564 4565 if (spare < CL_METADATA_SIZE + MSIZE) 4566 continue; 4567 n = (spare - CL_METADATA_SIZE) / MSIZE; 4568 if (n > howmany(hwb->size, maxp)) 4569 break; 4570 4571 hwidx = idx; 4572 if (fl->flags & FL_BUF_PACKING) { 4573 region1 = n * MSIZE; 4574 region3 = spare - region1; 4575 } else { 4576 region1 = MSIZE; 4577 region3 = spare - region1; 4578 break; 4579 } 4580 } 4581 4582 KASSERT(zidx >= 0 && zidx < SW_ZONE_SIZES, 4583 ("%s: bad zone %d for fl %p, maxp %d", __func__, zidx, fl, maxp)); 4584 KASSERT(hwidx >= 0 && hwidx <= SGE_FLBUF_SIZES, 4585 ("%s: bad hwidx %d for fl %p, maxp %d", __func__, hwidx, fl, maxp)); 4586 KASSERT(region1 + sc->sge.hw_buf_info[hwidx].size + region3 == 4587 sc->sge.sw_zone_info[zidx].size, 4588 ("%s: bad buffer layout for fl %p, maxp %d. " 4589 "cl %d; r1 %d, payload %d, r3 %d", __func__, fl, maxp, 4590 sc->sge.sw_zone_info[zidx].size, region1, 4591 sc->sge.hw_buf_info[hwidx].size, region3)); 4592 if (fl->flags & FL_BUF_PACKING || region1 > 0) { 4593 KASSERT(region3 >= CL_METADATA_SIZE, 4594 ("%s: no room for metadata. fl %p, maxp %d; " 4595 "cl %d; r1 %d, payload %d, r3 %d", __func__, fl, maxp, 4596 sc->sge.sw_zone_info[zidx].size, region1, 4597 sc->sge.hw_buf_info[hwidx].size, region3)); 4598 KASSERT(region1 % MSIZE == 0, 4599 ("%s: bad mbuf region for fl %p, maxp %d. " 4600 "cl %d; r1 %d, payload %d, r3 %d", __func__, fl, maxp, 4601 sc->sge.sw_zone_info[zidx].size, region1, 4602 sc->sge.hw_buf_info[hwidx].size, region3)); 4603 } 4604 4605 fl->cll_def.zidx = zidx; 4606 fl->cll_def.hwidx = hwidx; 4607 fl->cll_def.region1 = region1; 4608 fl->cll_def.region3 = region3; 4609 } 4610 4611 static void 4612 find_safe_refill_source(struct adapter *sc, struct sge_fl *fl) 4613 { 4614 struct sge *s = &sc->sge; 4615 struct hw_buf_info *hwb; 4616 struct sw_zone_info *swz; 4617 int spare; 4618 int8_t hwidx; 4619 4620 if (fl->flags & FL_BUF_PACKING) 4621 hwidx = s->safe_hwidx2; /* with room for metadata */ 4622 else if (allow_mbufs_in_cluster && s->safe_hwidx2 != -1) { 4623 hwidx = s->safe_hwidx2; 4624 hwb = &s->hw_buf_info[hwidx]; 4625 swz = &s->sw_zone_info[hwb->zidx]; 4626 spare = swz->size - hwb->size; 4627 4628 /* no good if there isn't room for an mbuf as well */ 4629 if (spare < CL_METADATA_SIZE + MSIZE) 4630 hwidx = s->safe_hwidx1; 4631 } else 4632 hwidx = s->safe_hwidx1; 4633 4634 if (hwidx == -1) { 4635 /* No fallback source */ 4636 fl->cll_alt.hwidx = -1; 4637 fl->cll_alt.zidx = -1; 4638 4639 return; 4640 } 4641 4642 hwb = &s->hw_buf_info[hwidx]; 4643 swz = &s->sw_zone_info[hwb->zidx]; 4644 spare = swz->size - hwb->size; 4645 fl->cll_alt.hwidx = hwidx; 4646 fl->cll_alt.zidx = hwb->zidx; 4647 if (allow_mbufs_in_cluster && 4648 (fl_pad == 0 || (MSIZE % sc->sge.pad_boundary) == 0)) 4649 fl->cll_alt.region1 = ((spare - CL_METADATA_SIZE) / MSIZE) * MSIZE; 4650 else 4651 fl->cll_alt.region1 = 0; 4652 fl->cll_alt.region3 = spare - fl->cll_alt.region1; 4653 } 4654 4655 static void 4656 add_fl_to_sfl(struct adapter *sc, struct sge_fl *fl) 4657 { 4658 mtx_lock(&sc->sfl_lock); 4659 FL_LOCK(fl); 4660 if ((fl->flags & FL_DOOMED) == 0) { 4661 fl->flags |= FL_STARVING; 4662 TAILQ_INSERT_TAIL(&sc->sfl, fl, link); 4663 callout_reset(&sc->sfl_callout, hz / 5, refill_sfl, sc); 4664 } 4665 FL_UNLOCK(fl); 4666 mtx_unlock(&sc->sfl_lock); 4667 } 4668 4669 static void 4670 handle_wrq_egr_update(struct adapter *sc, struct sge_eq *eq) 4671 { 4672 struct sge_wrq *wrq = (void *)eq; 4673 4674 atomic_readandclear_int(&eq->equiq); 4675 taskqueue_enqueue(sc->tq[eq->tx_chan], &wrq->wrq_tx_task); 4676 } 4677 4678 static void 4679 handle_eth_egr_update(struct adapter *sc, struct sge_eq *eq) 4680 { 4681 struct sge_txq *txq = (void *)eq; 4682 4683 MPASS((eq->flags & EQ_TYPEMASK) == EQ_ETH); 4684 4685 atomic_readandclear_int(&eq->equiq); 4686 mp_ring_check_drainage(txq->r, 0); 4687 taskqueue_enqueue(sc->tq[eq->tx_chan], &txq->tx_reclaim_task); 4688 } 4689 4690 static int 4691 handle_sge_egr_update(struct sge_iq *iq, const struct rss_header *rss, 4692 struct mbuf *m) 4693 { 4694 const struct cpl_sge_egr_update *cpl = (const void *)(rss + 1); 4695 unsigned int qid = G_EGR_QID(ntohl(cpl->opcode_qid)); 4696 struct adapter *sc = iq->adapter; 4697 struct sge *s = &sc->sge; 4698 struct sge_eq *eq; 4699 static void (*h[])(struct adapter *, struct sge_eq *) = {NULL, 4700 &handle_wrq_egr_update, &handle_eth_egr_update, 4701 &handle_wrq_egr_update}; 4702 4703 KASSERT(m == NULL, ("%s: payload with opcode %02x", __func__, 4704 rss->opcode)); 4705 4706 eq = s->eqmap[qid - s->eq_start]; 4707 (*h[eq->flags & EQ_TYPEMASK])(sc, eq); 4708 4709 return (0); 4710 } 4711 4712 /* handle_fw_msg works for both fw4_msg and fw6_msg because this is valid */ 4713 CTASSERT(offsetof(struct cpl_fw4_msg, data) == \ 4714 offsetof(struct cpl_fw6_msg, data)); 4715 4716 static int 4717 handle_fw_msg(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m) 4718 { 4719 struct adapter *sc = iq->adapter; 4720 const struct cpl_fw6_msg *cpl = (const void *)(rss + 1); 4721 4722 KASSERT(m == NULL, ("%s: payload with opcode %02x", __func__, 4723 rss->opcode)); 4724 4725 if (cpl->type == FW_TYPE_RSSCPL || cpl->type == FW6_TYPE_RSSCPL) { 4726 const struct rss_header *rss2; 4727 4728 rss2 = (const struct rss_header *)&cpl->data[0]; 4729 return (sc->cpl_handler[rss2->opcode](iq, rss2, m)); 4730 } 4731 4732 return (sc->fw_msg_handler[cpl->type](sc, &cpl->data[0])); 4733 } 4734 4735 static int 4736 sysctl_uint16(SYSCTL_HANDLER_ARGS) 4737 { 4738 uint16_t *id = arg1; 4739 int i = *id; 4740 4741 return sysctl_handle_int(oidp, &i, 0, req); 4742 } 4743 4744 static int 4745 sysctl_bufsizes(SYSCTL_HANDLER_ARGS) 4746 { 4747 struct sge *s = arg1; 4748 struct hw_buf_info *hwb = &s->hw_buf_info[0]; 4749 struct sw_zone_info *swz = &s->sw_zone_info[0]; 4750 int i, rc; 4751 struct sbuf sb; 4752 char c; 4753 4754 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 4755 for (i = 0; i < SGE_FLBUF_SIZES; i++, hwb++) { 4756 if (hwb->zidx >= 0 && swz[hwb->zidx].size <= largest_rx_cluster) 4757 c = '*'; 4758 else 4759 c = '\0'; 4760 4761 sbuf_printf(&sb, "%u%c ", hwb->size, c); 4762 } 4763 sbuf_trim(&sb); 4764 sbuf_finish(&sb); 4765 rc = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 4766 sbuf_delete(&sb); 4767 return (rc); 4768 } 4769