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/mbuf.h> 36 #include <sys/socket.h> 37 #include <sys/kernel.h> 38 #include <sys/kdb.h> 39 #include <sys/malloc.h> 40 #include <sys/queue.h> 41 #include <sys/taskqueue.h> 42 #include <sys/sysctl.h> 43 #include <sys/smp.h> 44 #include <net/bpf.h> 45 #include <net/ethernet.h> 46 #include <net/if.h> 47 #include <net/if_vlan_var.h> 48 #include <netinet/in.h> 49 #include <netinet/ip.h> 50 #include <netinet/ip6.h> 51 #include <netinet/tcp.h> 52 53 #include "common/common.h" 54 #include "common/t4_regs.h" 55 #include "common/t4_regs_values.h" 56 #include "common/t4_msg.h" 57 58 struct fl_buf_info { 59 int size; 60 int type; 61 uma_zone_t zone; 62 }; 63 64 /* Filled up by t4_sge_modload */ 65 static struct fl_buf_info fl_buf_info[FL_BUF_SIZES]; 66 67 #define FL_BUF_SIZE(x) (fl_buf_info[x].size) 68 #define FL_BUF_TYPE(x) (fl_buf_info[x].type) 69 #define FL_BUF_ZONE(x) (fl_buf_info[x].zone) 70 71 #ifdef T4_PKT_TIMESTAMP 72 #define RX_COPY_THRESHOLD (MINCLSIZE - 8) 73 #else 74 #define RX_COPY_THRESHOLD MINCLSIZE 75 #endif 76 77 /* 78 * Ethernet frames are DMA'd at this byte offset into the freelist buffer. 79 * 0-7 are valid values. 80 */ 81 static int fl_pktshift = 2; 82 TUNABLE_INT("hw.cxgbe.fl_pktshift", &fl_pktshift); 83 84 /* 85 * Pad ethernet payload up to this boundary. 86 * -1: driver should figure out a good value. 87 * Any power of 2, from 32 to 4096 (both inclusive) is a valid value. 88 */ 89 static int fl_pad = -1; 90 TUNABLE_INT("hw.cxgbe.fl_pad", &fl_pad); 91 92 /* 93 * Status page length. 94 * -1: driver should figure out a good value. 95 * 64 or 128 are the only other valid values. 96 */ 97 static int spg_len = -1; 98 TUNABLE_INT("hw.cxgbe.spg_len", &spg_len); 99 100 /* 101 * Congestion drops. 102 * -1: no congestion feedback (not recommended). 103 * 0: backpressure the channel instead of dropping packets right away. 104 * 1: no backpressure, drop packets for the congested queue immediately. 105 */ 106 static int cong_drop = 0; 107 TUNABLE_INT("hw.cxgbe.cong_drop", &cong_drop); 108 109 /* Used to track coalesced tx work request */ 110 struct txpkts { 111 uint64_t *flitp; /* ptr to flit where next pkt should start */ 112 uint8_t npkt; /* # of packets in this work request */ 113 uint8_t nflits; /* # of flits used by this work request */ 114 uint16_t plen; /* total payload (sum of all packets) */ 115 }; 116 117 /* A packet's SGL. This + m_pkthdr has all info needed for tx */ 118 struct sgl { 119 int nsegs; /* # of segments in the SGL, 0 means imm. tx */ 120 int nflits; /* # of flits needed for the SGL */ 121 bus_dma_segment_t seg[TX_SGL_SEGS]; 122 }; 123 124 static int service_iq(struct sge_iq *, int); 125 static struct mbuf *get_fl_payload(struct adapter *, struct sge_fl *, uint32_t, 126 int *); 127 static int t4_eth_rx(struct sge_iq *, const struct rss_header *, struct mbuf *); 128 static inline void init_iq(struct sge_iq *, struct adapter *, int, int, int, 129 int); 130 static inline void init_fl(struct sge_fl *, int, int, char *); 131 static inline void init_eq(struct sge_eq *, int, int, uint8_t, uint16_t, 132 char *); 133 static int alloc_ring(struct adapter *, size_t, bus_dma_tag_t *, bus_dmamap_t *, 134 bus_addr_t *, void **); 135 static int free_ring(struct adapter *, bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 136 void *); 137 static int alloc_iq_fl(struct port_info *, struct sge_iq *, struct sge_fl *, 138 int, int); 139 static int free_iq_fl(struct port_info *, struct sge_iq *, struct sge_fl *); 140 static int alloc_fwq(struct adapter *); 141 static int free_fwq(struct adapter *); 142 static int alloc_mgmtq(struct adapter *); 143 static int free_mgmtq(struct adapter *); 144 static int alloc_rxq(struct port_info *, struct sge_rxq *, int, int, 145 struct sysctl_oid *); 146 static int free_rxq(struct port_info *, struct sge_rxq *); 147 #ifdef TCP_OFFLOAD 148 static int alloc_ofld_rxq(struct port_info *, struct sge_ofld_rxq *, int, int, 149 struct sysctl_oid *); 150 static int free_ofld_rxq(struct port_info *, struct sge_ofld_rxq *); 151 #endif 152 static int ctrl_eq_alloc(struct adapter *, struct sge_eq *); 153 static int eth_eq_alloc(struct adapter *, struct port_info *, struct sge_eq *); 154 #ifdef TCP_OFFLOAD 155 static int ofld_eq_alloc(struct adapter *, struct port_info *, struct sge_eq *); 156 #endif 157 static int alloc_eq(struct adapter *, struct port_info *, struct sge_eq *); 158 static int free_eq(struct adapter *, struct sge_eq *); 159 static int alloc_wrq(struct adapter *, struct port_info *, struct sge_wrq *, 160 struct sysctl_oid *); 161 static int free_wrq(struct adapter *, struct sge_wrq *); 162 static int alloc_txq(struct port_info *, struct sge_txq *, int, 163 struct sysctl_oid *); 164 static int free_txq(struct port_info *, struct sge_txq *); 165 static void oneseg_dma_callback(void *, bus_dma_segment_t *, int, int); 166 static inline bool is_new_response(const struct sge_iq *, struct rsp_ctrl **); 167 static inline void iq_next(struct sge_iq *); 168 static inline void ring_fl_db(struct adapter *, struct sge_fl *); 169 static int refill_fl(struct adapter *, struct sge_fl *, int); 170 static void refill_sfl(void *); 171 static int alloc_fl_sdesc(struct sge_fl *); 172 static void free_fl_sdesc(struct sge_fl *); 173 static void set_fl_tag_idx(struct sge_fl *, int); 174 static void add_fl_to_sfl(struct adapter *, struct sge_fl *); 175 176 static int get_pkt_sgl(struct sge_txq *, struct mbuf **, struct sgl *, int); 177 static int free_pkt_sgl(struct sge_txq *, struct sgl *); 178 static int write_txpkt_wr(struct port_info *, struct sge_txq *, struct mbuf *, 179 struct sgl *); 180 static int add_to_txpkts(struct port_info *, struct sge_txq *, struct txpkts *, 181 struct mbuf *, struct sgl *); 182 static void write_txpkts_wr(struct sge_txq *, struct txpkts *); 183 static inline void write_ulp_cpl_sgl(struct port_info *, struct sge_txq *, 184 struct txpkts *, struct mbuf *, struct sgl *); 185 static int write_sgl_to_txd(struct sge_eq *, struct sgl *, caddr_t *); 186 static inline void copy_to_txd(struct sge_eq *, caddr_t, caddr_t *, int); 187 static inline void ring_eq_db(struct adapter *, struct sge_eq *); 188 static inline int reclaimable(struct sge_eq *); 189 static int reclaim_tx_descs(struct sge_txq *, int, int); 190 static void write_eqflush_wr(struct sge_eq *); 191 static __be64 get_flit(bus_dma_segment_t *, int, int); 192 static int handle_sge_egr_update(struct sge_iq *, const struct rss_header *, 193 struct mbuf *); 194 static int handle_fw_msg(struct sge_iq *, const struct rss_header *, 195 struct mbuf *); 196 197 static int sysctl_uint16(SYSCTL_HANDLER_ARGS); 198 199 #if defined(__i386__) || defined(__amd64__) 200 extern u_int cpu_clflush_line_size; 201 #endif 202 203 /* 204 * Called on MOD_LOAD. Fills up fl_buf_info[] and validates/calculates the SGE 205 * tunables. 206 */ 207 void 208 t4_sge_modload(void) 209 { 210 int i; 211 int bufsize[FL_BUF_SIZES] = { 212 MCLBYTES, 213 #if MJUMPAGESIZE != MCLBYTES 214 MJUMPAGESIZE, 215 #endif 216 MJUM9BYTES, 217 MJUM16BYTES 218 }; 219 220 for (i = 0; i < FL_BUF_SIZES; i++) { 221 FL_BUF_SIZE(i) = bufsize[i]; 222 FL_BUF_TYPE(i) = m_gettype(bufsize[i]); 223 FL_BUF_ZONE(i) = m_getzone(bufsize[i]); 224 } 225 226 if (fl_pktshift < 0 || fl_pktshift > 7) { 227 printf("Invalid hw.cxgbe.fl_pktshift value (%d)," 228 " using 2 instead.\n", fl_pktshift); 229 fl_pktshift = 2; 230 } 231 232 if (fl_pad < 32 || fl_pad > 4096 || !powerof2(fl_pad)) { 233 int pad; 234 235 #if defined(__i386__) || defined(__amd64__) 236 pad = max(cpu_clflush_line_size, 32); 237 #else 238 pad = max(CACHE_LINE_SIZE, 32); 239 #endif 240 pad = min(pad, 4096); 241 242 if (fl_pad != -1) { 243 printf("Invalid hw.cxgbe.fl_pad value (%d)," 244 " using %d instead.\n", fl_pad, pad); 245 } 246 fl_pad = pad; 247 } 248 249 if (spg_len != 64 && spg_len != 128) { 250 int len; 251 252 #if defined(__i386__) || defined(__amd64__) 253 len = cpu_clflush_line_size > 64 ? 128 : 64; 254 #else 255 len = 64; 256 #endif 257 if (spg_len != -1) { 258 printf("Invalid hw.cxgbe.spg_len value (%d)," 259 " using %d instead.\n", spg_len, len); 260 } 261 spg_len = len; 262 } 263 264 if (cong_drop < -1 || cong_drop > 1) { 265 printf("Invalid hw.cxgbe.cong_drop value (%d)," 266 " using 0 instead.\n", cong_drop); 267 cong_drop = 0; 268 } 269 } 270 271 void 272 t4_init_sge_cpl_handlers(struct adapter *sc) 273 { 274 275 t4_register_cpl_handler(sc, CPL_FW4_MSG, handle_fw_msg); 276 t4_register_cpl_handler(sc, CPL_FW6_MSG, handle_fw_msg); 277 t4_register_cpl_handler(sc, CPL_SGE_EGR_UPDATE, handle_sge_egr_update); 278 t4_register_cpl_handler(sc, CPL_RX_PKT, t4_eth_rx); 279 t4_register_fw_msg_handler(sc, FW6_TYPE_CMD_RPL, t4_handle_fw_rpl); 280 } 281 282 /* 283 * adap->params.vpd.cclk must be set up before this is called. 284 */ 285 void 286 t4_tweak_chip_settings(struct adapter *sc) 287 { 288 int i; 289 uint32_t v, m; 290 int intr_timer[SGE_NTIMERS] = {1, 5, 10, 50, 100, 200}; 291 int timer_max = M_TIMERVALUE0 * 1000 / sc->params.vpd.cclk; 292 int intr_pktcount[SGE_NCOUNTERS] = {1, 8, 16, 32}; /* 63 max */ 293 uint16_t indsz = min(RX_COPY_THRESHOLD - 1, M_INDICATESIZE); 294 295 KASSERT(sc->flags & MASTER_PF, 296 ("%s: trying to change chip settings when not master.", __func__)); 297 298 m = V_PKTSHIFT(M_PKTSHIFT) | F_RXPKTCPLMODE | 299 V_INGPADBOUNDARY(M_INGPADBOUNDARY) | F_EGRSTATUSPAGESIZE; 300 v = V_PKTSHIFT(fl_pktshift) | F_RXPKTCPLMODE | 301 V_INGPADBOUNDARY(ilog2(fl_pad) - 5) | 302 V_EGRSTATUSPAGESIZE(spg_len == 128); 303 t4_set_reg_field(sc, A_SGE_CONTROL, m, v); 304 305 v = V_HOSTPAGESIZEPF0(PAGE_SHIFT - 10) | 306 V_HOSTPAGESIZEPF1(PAGE_SHIFT - 10) | 307 V_HOSTPAGESIZEPF2(PAGE_SHIFT - 10) | 308 V_HOSTPAGESIZEPF3(PAGE_SHIFT - 10) | 309 V_HOSTPAGESIZEPF4(PAGE_SHIFT - 10) | 310 V_HOSTPAGESIZEPF5(PAGE_SHIFT - 10) | 311 V_HOSTPAGESIZEPF6(PAGE_SHIFT - 10) | 312 V_HOSTPAGESIZEPF7(PAGE_SHIFT - 10); 313 t4_write_reg(sc, A_SGE_HOST_PAGE_SIZE, v); 314 315 for (i = 0; i < FL_BUF_SIZES; i++) { 316 t4_write_reg(sc, A_SGE_FL_BUFFER_SIZE0 + (4 * i), 317 FL_BUF_SIZE(i)); 318 } 319 320 v = V_THRESHOLD_0(intr_pktcount[0]) | V_THRESHOLD_1(intr_pktcount[1]) | 321 V_THRESHOLD_2(intr_pktcount[2]) | V_THRESHOLD_3(intr_pktcount[3]); 322 t4_write_reg(sc, A_SGE_INGRESS_RX_THRESHOLD, v); 323 324 KASSERT(intr_timer[0] <= timer_max, 325 ("%s: not a single usable timer (%d, %d)", __func__, intr_timer[0], 326 timer_max)); 327 for (i = 1; i < nitems(intr_timer); i++) { 328 KASSERT(intr_timer[i] >= intr_timer[i - 1], 329 ("%s: timers not listed in increasing order (%d)", 330 __func__, i)); 331 332 while (intr_timer[i] > timer_max) { 333 if (i == nitems(intr_timer) - 1) { 334 intr_timer[i] = timer_max; 335 break; 336 } 337 intr_timer[i] += intr_timer[i - 1]; 338 intr_timer[i] /= 2; 339 } 340 } 341 342 v = V_TIMERVALUE0(us_to_core_ticks(sc, intr_timer[0])) | 343 V_TIMERVALUE1(us_to_core_ticks(sc, intr_timer[1])); 344 t4_write_reg(sc, A_SGE_TIMER_VALUE_0_AND_1, v); 345 v = V_TIMERVALUE2(us_to_core_ticks(sc, intr_timer[2])) | 346 V_TIMERVALUE3(us_to_core_ticks(sc, intr_timer[3])); 347 t4_write_reg(sc, A_SGE_TIMER_VALUE_2_AND_3, v); 348 v = V_TIMERVALUE4(us_to_core_ticks(sc, intr_timer[4])) | 349 V_TIMERVALUE5(us_to_core_ticks(sc, intr_timer[5])); 350 t4_write_reg(sc, A_SGE_TIMER_VALUE_4_AND_5, v); 351 352 if (cong_drop == 0) { 353 m = F_TUNNELCNGDROP0 | F_TUNNELCNGDROP1 | F_TUNNELCNGDROP2 | 354 F_TUNNELCNGDROP3; 355 t4_set_reg_field(sc, A_TP_PARA_REG3, m, 0); 356 } 357 358 /* 4K, 16K, 64K, 256K DDP "page sizes" */ 359 v = V_HPZ0(0) | V_HPZ1(2) | V_HPZ2(4) | V_HPZ3(6); 360 t4_write_reg(sc, A_ULP_RX_TDDP_PSZ, v); 361 362 m = v = F_TDDPTAGTCB; 363 t4_set_reg_field(sc, A_ULP_RX_CTL, m, v); 364 365 m = V_INDICATESIZE(M_INDICATESIZE) | F_REARMDDPOFFSET | 366 F_RESETDDPOFFSET; 367 v = V_INDICATESIZE(indsz) | F_REARMDDPOFFSET | F_RESETDDPOFFSET; 368 t4_set_reg_field(sc, A_TP_PARA_REG5, m, v); 369 } 370 371 /* 372 * XXX: driver really should be able to deal with unexpected settings. 373 */ 374 int 375 t4_read_chip_settings(struct adapter *sc) 376 { 377 struct sge *s = &sc->sge; 378 int i, rc = 0; 379 uint32_t m, v, r; 380 uint16_t indsz = min(RX_COPY_THRESHOLD - 1, M_INDICATESIZE); 381 382 m = V_PKTSHIFT(M_PKTSHIFT) | F_RXPKTCPLMODE | 383 V_INGPADBOUNDARY(M_INGPADBOUNDARY) | F_EGRSTATUSPAGESIZE; 384 v = V_PKTSHIFT(fl_pktshift) | F_RXPKTCPLMODE | 385 V_INGPADBOUNDARY(ilog2(fl_pad) - 5) | 386 V_EGRSTATUSPAGESIZE(spg_len == 128); 387 r = t4_read_reg(sc, A_SGE_CONTROL); 388 if ((r & m) != v) { 389 device_printf(sc->dev, "invalid SGE_CONTROL(0x%x)\n", r); 390 rc = EINVAL; 391 } 392 393 v = V_HOSTPAGESIZEPF0(PAGE_SHIFT - 10) | 394 V_HOSTPAGESIZEPF1(PAGE_SHIFT - 10) | 395 V_HOSTPAGESIZEPF2(PAGE_SHIFT - 10) | 396 V_HOSTPAGESIZEPF3(PAGE_SHIFT - 10) | 397 V_HOSTPAGESIZEPF4(PAGE_SHIFT - 10) | 398 V_HOSTPAGESIZEPF5(PAGE_SHIFT - 10) | 399 V_HOSTPAGESIZEPF6(PAGE_SHIFT - 10) | 400 V_HOSTPAGESIZEPF7(PAGE_SHIFT - 10); 401 r = t4_read_reg(sc, A_SGE_HOST_PAGE_SIZE); 402 if (r != v) { 403 device_printf(sc->dev, "invalid SGE_HOST_PAGE_SIZE(0x%x)\n", r); 404 rc = EINVAL; 405 } 406 407 for (i = 0; i < FL_BUF_SIZES; i++) { 408 v = t4_read_reg(sc, A_SGE_FL_BUFFER_SIZE0 + (4 * i)); 409 if (v != FL_BUF_SIZE(i)) { 410 device_printf(sc->dev, 411 "invalid SGE_FL_BUFFER_SIZE[%d](0x%x)\n", i, v); 412 rc = EINVAL; 413 } 414 } 415 416 r = t4_read_reg(sc, A_SGE_INGRESS_RX_THRESHOLD); 417 s->counter_val[0] = G_THRESHOLD_0(r); 418 s->counter_val[1] = G_THRESHOLD_1(r); 419 s->counter_val[2] = G_THRESHOLD_2(r); 420 s->counter_val[3] = G_THRESHOLD_3(r); 421 422 r = t4_read_reg(sc, A_SGE_TIMER_VALUE_0_AND_1); 423 s->timer_val[0] = G_TIMERVALUE0(r) / core_ticks_per_usec(sc); 424 s->timer_val[1] = G_TIMERVALUE1(r) / core_ticks_per_usec(sc); 425 r = t4_read_reg(sc, A_SGE_TIMER_VALUE_2_AND_3); 426 s->timer_val[2] = G_TIMERVALUE2(r) / core_ticks_per_usec(sc); 427 s->timer_val[3] = G_TIMERVALUE3(r) / core_ticks_per_usec(sc); 428 r = t4_read_reg(sc, A_SGE_TIMER_VALUE_4_AND_5); 429 s->timer_val[4] = G_TIMERVALUE4(r) / core_ticks_per_usec(sc); 430 s->timer_val[5] = G_TIMERVALUE5(r) / core_ticks_per_usec(sc); 431 432 if (cong_drop == 0) { 433 m = F_TUNNELCNGDROP0 | F_TUNNELCNGDROP1 | F_TUNNELCNGDROP2 | 434 F_TUNNELCNGDROP3; 435 r = t4_read_reg(sc, A_TP_PARA_REG3); 436 if (r & m) { 437 device_printf(sc->dev, 438 "invalid TP_PARA_REG3(0x%x)\n", r); 439 rc = EINVAL; 440 } 441 } 442 443 v = V_HPZ0(0) | V_HPZ1(2) | V_HPZ2(4) | V_HPZ3(6); 444 r = t4_read_reg(sc, A_ULP_RX_TDDP_PSZ); 445 if (r != v) { 446 device_printf(sc->dev, "invalid ULP_RX_TDDP_PSZ(0x%x)\n", r); 447 rc = EINVAL; 448 } 449 450 m = v = F_TDDPTAGTCB; 451 r = t4_read_reg(sc, A_ULP_RX_CTL); 452 if ((r & m) != v) { 453 device_printf(sc->dev, "invalid ULP_RX_CTL(0x%x)\n", r); 454 rc = EINVAL; 455 } 456 457 m = V_INDICATESIZE(M_INDICATESIZE) | F_REARMDDPOFFSET | 458 F_RESETDDPOFFSET; 459 v = V_INDICATESIZE(indsz) | F_REARMDDPOFFSET | F_RESETDDPOFFSET; 460 r = t4_read_reg(sc, A_TP_PARA_REG5); 461 if ((r & m) != v) { 462 device_printf(sc->dev, "invalid TP_PARA_REG5(0x%x)\n", r); 463 rc = EINVAL; 464 } 465 466 r = t4_read_reg(sc, A_SGE_CONM_CTRL); 467 s->fl_starve_threshold = G_EGRTHRESHOLD(r) * 2 + 1; 468 469 if (is_t5(sc)) { 470 r = t4_read_reg(sc, A_SGE_EGRESS_QUEUES_PER_PAGE_PF); 471 r >>= S_QUEUESPERPAGEPF0 + 472 (S_QUEUESPERPAGEPF1 - S_QUEUESPERPAGEPF0) * sc->pf; 473 s->s_qpp = r & M_QUEUESPERPAGEPF0; 474 } 475 476 t4_init_tp_params(sc); 477 478 t4_read_mtu_tbl(sc, sc->params.mtus, NULL); 479 t4_load_mtus(sc, sc->params.mtus, sc->params.a_wnd, sc->params.b_wnd); 480 481 return (rc); 482 } 483 484 int 485 t4_create_dma_tag(struct adapter *sc) 486 { 487 int rc; 488 489 rc = bus_dma_tag_create(bus_get_dma_tag(sc->dev), 1, 0, 490 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, BUS_SPACE_MAXSIZE, 491 BUS_SPACE_UNRESTRICTED, BUS_SPACE_MAXSIZE, BUS_DMA_ALLOCNOW, NULL, 492 NULL, &sc->dmat); 493 if (rc != 0) { 494 device_printf(sc->dev, 495 "failed to create main DMA tag: %d\n", rc); 496 } 497 498 return (rc); 499 } 500 501 void 502 t4_sge_sysctls(struct adapter *sc, struct sysctl_ctx_list *ctx, 503 struct sysctl_oid_list *children) 504 { 505 506 SYSCTL_ADD_INT(ctx, children, OID_AUTO, "fl_pktshift", CTLFLAG_RD, 507 NULL, fl_pktshift, "payload DMA offset in rx buffer (bytes)"); 508 509 SYSCTL_ADD_INT(ctx, children, OID_AUTO, "fl_pad", CTLFLAG_RD, 510 NULL, fl_pad, "payload pad boundary (bytes)"); 511 512 SYSCTL_ADD_INT(ctx, children, OID_AUTO, "spg_len", CTLFLAG_RD, 513 NULL, spg_len, "status page size (bytes)"); 514 515 SYSCTL_ADD_INT(ctx, children, OID_AUTO, "cong_drop", CTLFLAG_RD, 516 NULL, cong_drop, "congestion drop setting"); 517 } 518 519 int 520 t4_destroy_dma_tag(struct adapter *sc) 521 { 522 if (sc->dmat) 523 bus_dma_tag_destroy(sc->dmat); 524 525 return (0); 526 } 527 528 /* 529 * Allocate and initialize the firmware event queue and the management queue. 530 * 531 * Returns errno on failure. Resources allocated up to that point may still be 532 * allocated. Caller is responsible for cleanup in case this function fails. 533 */ 534 int 535 t4_setup_adapter_queues(struct adapter *sc) 536 { 537 int rc; 538 539 ADAPTER_LOCK_ASSERT_NOTOWNED(sc); 540 541 sysctl_ctx_init(&sc->ctx); 542 sc->flags |= ADAP_SYSCTL_CTX; 543 544 /* 545 * Firmware event queue 546 */ 547 rc = alloc_fwq(sc); 548 if (rc != 0) 549 return (rc); 550 551 /* 552 * Management queue. This is just a control queue that uses the fwq as 553 * its associated iq. 554 */ 555 rc = alloc_mgmtq(sc); 556 557 return (rc); 558 } 559 560 /* 561 * Idempotent 562 */ 563 int 564 t4_teardown_adapter_queues(struct adapter *sc) 565 { 566 567 ADAPTER_LOCK_ASSERT_NOTOWNED(sc); 568 569 /* Do this before freeing the queue */ 570 if (sc->flags & ADAP_SYSCTL_CTX) { 571 sysctl_ctx_free(&sc->ctx); 572 sc->flags &= ~ADAP_SYSCTL_CTX; 573 } 574 575 free_mgmtq(sc); 576 free_fwq(sc); 577 578 return (0); 579 } 580 581 static inline int 582 first_vector(struct port_info *pi) 583 { 584 struct adapter *sc = pi->adapter; 585 int rc = T4_EXTRA_INTR, i; 586 587 if (sc->intr_count == 1) 588 return (0); 589 590 for_each_port(sc, i) { 591 struct port_info *p = sc->port[i]; 592 593 if (i == pi->port_id) 594 break; 595 596 #ifdef TCP_OFFLOAD 597 if (sc->flags & INTR_DIRECT) 598 rc += p->nrxq + p->nofldrxq; 599 else 600 rc += max(p->nrxq, p->nofldrxq); 601 #else 602 /* 603 * Not compiled with offload support and intr_count > 1. Only 604 * NIC queues exist and they'd better be taking direct 605 * interrupts. 606 */ 607 KASSERT(sc->flags & INTR_DIRECT, 608 ("%s: intr_count %d, !INTR_DIRECT", __func__, 609 sc->intr_count)); 610 611 rc += p->nrxq; 612 #endif 613 } 614 615 return (rc); 616 } 617 618 /* 619 * Given an arbitrary "index," come up with an iq that can be used by other 620 * queues (of this port) for interrupt forwarding, SGE egress updates, etc. 621 * The iq returned is guaranteed to be something that takes direct interrupts. 622 */ 623 static struct sge_iq * 624 port_intr_iq(struct port_info *pi, int idx) 625 { 626 struct adapter *sc = pi->adapter; 627 struct sge *s = &sc->sge; 628 struct sge_iq *iq = NULL; 629 630 if (sc->intr_count == 1) 631 return (&sc->sge.fwq); 632 633 #ifdef TCP_OFFLOAD 634 if (sc->flags & INTR_DIRECT) { 635 idx %= pi->nrxq + pi->nofldrxq; 636 637 if (idx >= pi->nrxq) { 638 idx -= pi->nrxq; 639 iq = &s->ofld_rxq[pi->first_ofld_rxq + idx].iq; 640 } else 641 iq = &s->rxq[pi->first_rxq + idx].iq; 642 643 } else { 644 idx %= max(pi->nrxq, pi->nofldrxq); 645 646 if (pi->nrxq >= pi->nofldrxq) 647 iq = &s->rxq[pi->first_rxq + idx].iq; 648 else 649 iq = &s->ofld_rxq[pi->first_ofld_rxq + idx].iq; 650 } 651 #else 652 /* 653 * Not compiled with offload support and intr_count > 1. Only NIC 654 * queues exist and they'd better be taking direct interrupts. 655 */ 656 KASSERT(sc->flags & INTR_DIRECT, 657 ("%s: intr_count %d, !INTR_DIRECT", __func__, sc->intr_count)); 658 659 idx %= pi->nrxq; 660 iq = &s->rxq[pi->first_rxq + idx].iq; 661 #endif 662 663 KASSERT(iq->flags & IQ_INTR, ("%s: EDOOFUS", __func__)); 664 return (iq); 665 } 666 667 static inline int 668 mtu_to_bufsize(int mtu) 669 { 670 int bufsize; 671 672 /* large enough for a frame even when VLAN extraction is disabled */ 673 bufsize = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN + mtu; 674 bufsize = roundup2(bufsize + fl_pktshift, fl_pad); 675 676 return (bufsize); 677 } 678 679 #ifdef TCP_OFFLOAD 680 static inline int 681 mtu_to_bufsize_toe(struct adapter *sc, int mtu) 682 { 683 684 if (sc->tt.rx_coalesce) 685 return (G_RXCOALESCESIZE(t4_read_reg(sc, A_TP_PARA_REG2))); 686 687 return (mtu); 688 } 689 #endif 690 691 int 692 t4_setup_port_queues(struct port_info *pi) 693 { 694 int rc = 0, i, j, intr_idx, iqid; 695 struct sge_rxq *rxq; 696 struct sge_txq *txq; 697 struct sge_wrq *ctrlq; 698 #ifdef TCP_OFFLOAD 699 struct sge_ofld_rxq *ofld_rxq; 700 struct sge_wrq *ofld_txq; 701 struct sysctl_oid *oid2 = NULL; 702 #endif 703 char name[16]; 704 struct adapter *sc = pi->adapter; 705 struct ifnet *ifp = pi->ifp; 706 struct sysctl_oid *oid = device_get_sysctl_tree(pi->dev); 707 struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid); 708 int bufsize; 709 710 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "rxq", CTLFLAG_RD, 711 NULL, "rx queues"); 712 713 #ifdef TCP_OFFLOAD 714 if (is_offload(sc)) { 715 oid2 = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "ofld_rxq", 716 CTLFLAG_RD, NULL, 717 "rx queues for offloaded TCP connections"); 718 } 719 #endif 720 721 /* Interrupt vector to start from (when using multiple vectors) */ 722 intr_idx = first_vector(pi); 723 724 /* 725 * First pass over all rx queues (NIC and TOE): 726 * a) initialize iq and fl 727 * b) allocate queue iff it will take direct interrupts. 728 */ 729 bufsize = mtu_to_bufsize(ifp->if_mtu); 730 for_each_rxq(pi, i, rxq) { 731 732 init_iq(&rxq->iq, sc, pi->tmr_idx, pi->pktc_idx, pi->qsize_rxq, 733 RX_IQ_ESIZE); 734 735 snprintf(name, sizeof(name), "%s rxq%d-fl", 736 device_get_nameunit(pi->dev), i); 737 init_fl(&rxq->fl, pi->qsize_rxq / 8, bufsize, name); 738 739 if (sc->flags & INTR_DIRECT 740 #ifdef TCP_OFFLOAD 741 || (sc->intr_count > 1 && pi->nrxq >= pi->nofldrxq) 742 #endif 743 ) { 744 rxq->iq.flags |= IQ_INTR; 745 rc = alloc_rxq(pi, rxq, intr_idx, i, oid); 746 if (rc != 0) 747 goto done; 748 intr_idx++; 749 } 750 } 751 752 #ifdef TCP_OFFLOAD 753 bufsize = mtu_to_bufsize_toe(sc, ifp->if_mtu); 754 for_each_ofld_rxq(pi, i, ofld_rxq) { 755 756 init_iq(&ofld_rxq->iq, sc, pi->tmr_idx, pi->pktc_idx, 757 pi->qsize_rxq, RX_IQ_ESIZE); 758 759 snprintf(name, sizeof(name), "%s ofld_rxq%d-fl", 760 device_get_nameunit(pi->dev), i); 761 init_fl(&ofld_rxq->fl, pi->qsize_rxq / 8, bufsize, name); 762 763 if (sc->flags & INTR_DIRECT || 764 (sc->intr_count > 1 && pi->nofldrxq > pi->nrxq)) { 765 ofld_rxq->iq.flags |= IQ_INTR; 766 rc = alloc_ofld_rxq(pi, ofld_rxq, intr_idx, i, oid2); 767 if (rc != 0) 768 goto done; 769 intr_idx++; 770 } 771 } 772 #endif 773 774 /* 775 * Second pass over all rx queues (NIC and TOE). The queues forwarding 776 * their interrupts are allocated now. 777 */ 778 j = 0; 779 for_each_rxq(pi, i, rxq) { 780 if (rxq->iq.flags & IQ_INTR) 781 continue; 782 783 intr_idx = port_intr_iq(pi, j)->abs_id; 784 785 rc = alloc_rxq(pi, rxq, intr_idx, i, oid); 786 if (rc != 0) 787 goto done; 788 j++; 789 } 790 791 #ifdef TCP_OFFLOAD 792 for_each_ofld_rxq(pi, i, ofld_rxq) { 793 if (ofld_rxq->iq.flags & IQ_INTR) 794 continue; 795 796 intr_idx = port_intr_iq(pi, j)->abs_id; 797 798 rc = alloc_ofld_rxq(pi, ofld_rxq, intr_idx, i, oid2); 799 if (rc != 0) 800 goto done; 801 j++; 802 } 803 #endif 804 805 /* 806 * Now the tx queues. Only one pass needed. 807 */ 808 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "txq", CTLFLAG_RD, 809 NULL, "tx queues"); 810 j = 0; 811 for_each_txq(pi, i, txq) { 812 uint16_t iqid; 813 814 iqid = port_intr_iq(pi, j)->cntxt_id; 815 816 snprintf(name, sizeof(name), "%s txq%d", 817 device_get_nameunit(pi->dev), i); 818 init_eq(&txq->eq, EQ_ETH, pi->qsize_txq, pi->tx_chan, iqid, 819 name); 820 821 rc = alloc_txq(pi, txq, i, oid); 822 if (rc != 0) 823 goto done; 824 j++; 825 } 826 827 #ifdef TCP_OFFLOAD 828 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "ofld_txq", 829 CTLFLAG_RD, NULL, "tx queues for offloaded TCP connections"); 830 for_each_ofld_txq(pi, i, ofld_txq) { 831 uint16_t iqid; 832 833 iqid = port_intr_iq(pi, j)->cntxt_id; 834 835 snprintf(name, sizeof(name), "%s ofld_txq%d", 836 device_get_nameunit(pi->dev), i); 837 init_eq(&ofld_txq->eq, EQ_OFLD, pi->qsize_txq, pi->tx_chan, 838 iqid, name); 839 840 snprintf(name, sizeof(name), "%d", i); 841 oid2 = SYSCTL_ADD_NODE(&pi->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 842 name, CTLFLAG_RD, NULL, "offload tx queue"); 843 844 rc = alloc_wrq(sc, pi, ofld_txq, oid2); 845 if (rc != 0) 846 goto done; 847 j++; 848 } 849 #endif 850 851 /* 852 * Finally, the control queue. 853 */ 854 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "ctrlq", CTLFLAG_RD, 855 NULL, "ctrl queue"); 856 ctrlq = &sc->sge.ctrlq[pi->port_id]; 857 iqid = port_intr_iq(pi, 0)->cntxt_id; 858 snprintf(name, sizeof(name), "%s ctrlq", device_get_nameunit(pi->dev)); 859 init_eq(&ctrlq->eq, EQ_CTRL, CTRL_EQ_QSIZE, pi->tx_chan, iqid, name); 860 rc = alloc_wrq(sc, pi, ctrlq, oid); 861 862 done: 863 if (rc) 864 t4_teardown_port_queues(pi); 865 866 return (rc); 867 } 868 869 /* 870 * Idempotent 871 */ 872 int 873 t4_teardown_port_queues(struct port_info *pi) 874 { 875 int i; 876 struct adapter *sc = pi->adapter; 877 struct sge_rxq *rxq; 878 struct sge_txq *txq; 879 #ifdef TCP_OFFLOAD 880 struct sge_ofld_rxq *ofld_rxq; 881 struct sge_wrq *ofld_txq; 882 #endif 883 884 /* Do this before freeing the queues */ 885 if (pi->flags & PORT_SYSCTL_CTX) { 886 sysctl_ctx_free(&pi->ctx); 887 pi->flags &= ~PORT_SYSCTL_CTX; 888 } 889 890 /* 891 * Take down all the tx queues first, as they reference the rx queues 892 * (for egress updates, etc.). 893 */ 894 895 free_wrq(sc, &sc->sge.ctrlq[pi->port_id]); 896 897 for_each_txq(pi, i, txq) { 898 free_txq(pi, txq); 899 } 900 901 #ifdef TCP_OFFLOAD 902 for_each_ofld_txq(pi, i, ofld_txq) { 903 free_wrq(sc, ofld_txq); 904 } 905 #endif 906 907 /* 908 * Then take down the rx queues that forward their interrupts, as they 909 * reference other rx queues. 910 */ 911 912 for_each_rxq(pi, i, rxq) { 913 if ((rxq->iq.flags & IQ_INTR) == 0) 914 free_rxq(pi, rxq); 915 } 916 917 #ifdef TCP_OFFLOAD 918 for_each_ofld_rxq(pi, i, ofld_rxq) { 919 if ((ofld_rxq->iq.flags & IQ_INTR) == 0) 920 free_ofld_rxq(pi, ofld_rxq); 921 } 922 #endif 923 924 /* 925 * Then take down the rx queues that take direct interrupts. 926 */ 927 928 for_each_rxq(pi, i, rxq) { 929 if (rxq->iq.flags & IQ_INTR) 930 free_rxq(pi, rxq); 931 } 932 933 #ifdef TCP_OFFLOAD 934 for_each_ofld_rxq(pi, i, ofld_rxq) { 935 if (ofld_rxq->iq.flags & IQ_INTR) 936 free_ofld_rxq(pi, ofld_rxq); 937 } 938 #endif 939 940 return (0); 941 } 942 943 /* 944 * Deals with errors and the firmware event queue. All data rx queues forward 945 * their interrupt to the firmware event queue. 946 */ 947 void 948 t4_intr_all(void *arg) 949 { 950 struct adapter *sc = arg; 951 struct sge_iq *fwq = &sc->sge.fwq; 952 953 t4_intr_err(arg); 954 if (atomic_cmpset_int(&fwq->state, IQS_IDLE, IQS_BUSY)) { 955 service_iq(fwq, 0); 956 atomic_cmpset_int(&fwq->state, IQS_BUSY, IQS_IDLE); 957 } 958 } 959 960 /* Deals with error interrupts */ 961 void 962 t4_intr_err(void *arg) 963 { 964 struct adapter *sc = arg; 965 966 t4_write_reg(sc, MYPF_REG(A_PCIE_PF_CLI), 0); 967 t4_slow_intr_handler(sc); 968 } 969 970 void 971 t4_intr_evt(void *arg) 972 { 973 struct sge_iq *iq = arg; 974 975 if (atomic_cmpset_int(&iq->state, IQS_IDLE, IQS_BUSY)) { 976 service_iq(iq, 0); 977 atomic_cmpset_int(&iq->state, IQS_BUSY, IQS_IDLE); 978 } 979 } 980 981 void 982 t4_intr(void *arg) 983 { 984 struct sge_iq *iq = arg; 985 986 if (atomic_cmpset_int(&iq->state, IQS_IDLE, IQS_BUSY)) { 987 service_iq(iq, 0); 988 atomic_cmpset_int(&iq->state, IQS_BUSY, IQS_IDLE); 989 } 990 } 991 992 /* 993 * Deals with anything and everything on the given ingress queue. 994 */ 995 static int 996 service_iq(struct sge_iq *iq, int budget) 997 { 998 struct sge_iq *q; 999 struct sge_rxq *rxq = iq_to_rxq(iq); /* Use iff iq is part of rxq */ 1000 struct sge_fl *fl = &rxq->fl; /* Use iff IQ_HAS_FL */ 1001 struct adapter *sc = iq->adapter; 1002 struct rsp_ctrl *ctrl; 1003 const struct rss_header *rss; 1004 int ndescs = 0, limit, fl_bufs_used = 0; 1005 int rsp_type; 1006 uint32_t lq; 1007 struct mbuf *m0; 1008 STAILQ_HEAD(, sge_iq) iql = STAILQ_HEAD_INITIALIZER(iql); 1009 1010 limit = budget ? budget : iq->qsize / 8; 1011 1012 KASSERT(iq->state == IQS_BUSY, ("%s: iq %p not BUSY", __func__, iq)); 1013 1014 /* 1015 * We always come back and check the descriptor ring for new indirect 1016 * interrupts and other responses after running a single handler. 1017 */ 1018 for (;;) { 1019 while (is_new_response(iq, &ctrl)) { 1020 1021 rmb(); 1022 1023 m0 = NULL; 1024 rsp_type = G_RSPD_TYPE(ctrl->u.type_gen); 1025 lq = be32toh(ctrl->pldbuflen_qid); 1026 rss = (const void *)iq->cdesc; 1027 1028 switch (rsp_type) { 1029 case X_RSPD_TYPE_FLBUF: 1030 1031 KASSERT(iq->flags & IQ_HAS_FL, 1032 ("%s: data for an iq (%p) with no freelist", 1033 __func__, iq)); 1034 1035 m0 = get_fl_payload(sc, fl, lq, &fl_bufs_used); 1036 #ifdef T4_PKT_TIMESTAMP 1037 /* 1038 * 60 bit timestamp for the payload is 1039 * *(uint64_t *)m0->m_pktdat. Note that it is 1040 * in the leading free-space in the mbuf. The 1041 * kernel can clobber it during a pullup, 1042 * m_copymdata, etc. You need to make sure that 1043 * the mbuf reaches you unmolested if you care 1044 * about the timestamp. 1045 */ 1046 *(uint64_t *)m0->m_pktdat = 1047 be64toh(ctrl->u.last_flit) & 1048 0xfffffffffffffff; 1049 #endif 1050 1051 /* fall through */ 1052 1053 case X_RSPD_TYPE_CPL: 1054 KASSERT(rss->opcode < NUM_CPL_CMDS, 1055 ("%s: bad opcode %02x.", __func__, 1056 rss->opcode)); 1057 sc->cpl_handler[rss->opcode](iq, rss, m0); 1058 break; 1059 1060 case X_RSPD_TYPE_INTR: 1061 1062 /* 1063 * Interrupts should be forwarded only to queues 1064 * that are not forwarding their interrupts. 1065 * This means service_iq can recurse but only 1 1066 * level deep. 1067 */ 1068 KASSERT(budget == 0, 1069 ("%s: budget %u, rsp_type %u", __func__, 1070 budget, rsp_type)); 1071 1072 q = sc->sge.iqmap[lq - sc->sge.iq_start]; 1073 if (atomic_cmpset_int(&q->state, IQS_IDLE, 1074 IQS_BUSY)) { 1075 if (service_iq(q, q->qsize / 8) == 0) { 1076 atomic_cmpset_int(&q->state, 1077 IQS_BUSY, IQS_IDLE); 1078 } else { 1079 STAILQ_INSERT_TAIL(&iql, q, 1080 link); 1081 } 1082 } 1083 break; 1084 1085 default: 1086 sc->an_handler(iq, ctrl); 1087 break; 1088 } 1089 1090 iq_next(iq); 1091 if (++ndescs == limit) { 1092 t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS), 1093 V_CIDXINC(ndescs) | 1094 V_INGRESSQID(iq->cntxt_id) | 1095 V_SEINTARM(V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX))); 1096 ndescs = 0; 1097 1098 if (fl_bufs_used > 0) { 1099 FL_LOCK(fl); 1100 fl->needed += fl_bufs_used; 1101 refill_fl(sc, fl, fl->cap / 8); 1102 FL_UNLOCK(fl); 1103 fl_bufs_used = 0; 1104 } 1105 1106 if (budget) 1107 return (EINPROGRESS); 1108 } 1109 } 1110 1111 if (STAILQ_EMPTY(&iql)) 1112 break; 1113 1114 /* 1115 * Process the head only, and send it to the back of the list if 1116 * it's still not done. 1117 */ 1118 q = STAILQ_FIRST(&iql); 1119 STAILQ_REMOVE_HEAD(&iql, link); 1120 if (service_iq(q, q->qsize / 8) == 0) 1121 atomic_cmpset_int(&q->state, IQS_BUSY, IQS_IDLE); 1122 else 1123 STAILQ_INSERT_TAIL(&iql, q, link); 1124 } 1125 1126 #if defined(INET) || defined(INET6) 1127 if (iq->flags & IQ_LRO_ENABLED) { 1128 struct lro_ctrl *lro = &rxq->lro; 1129 struct lro_entry *l; 1130 1131 while (!SLIST_EMPTY(&lro->lro_active)) { 1132 l = SLIST_FIRST(&lro->lro_active); 1133 SLIST_REMOVE_HEAD(&lro->lro_active, next); 1134 tcp_lro_flush(lro, l); 1135 } 1136 } 1137 #endif 1138 1139 t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS), V_CIDXINC(ndescs) | 1140 V_INGRESSQID((u32)iq->cntxt_id) | V_SEINTARM(iq->intr_params)); 1141 1142 if (iq->flags & IQ_HAS_FL) { 1143 int starved; 1144 1145 FL_LOCK(fl); 1146 fl->needed += fl_bufs_used; 1147 starved = refill_fl(sc, fl, fl->cap / 4); 1148 FL_UNLOCK(fl); 1149 if (__predict_false(starved != 0)) 1150 add_fl_to_sfl(sc, fl); 1151 } 1152 1153 return (0); 1154 } 1155 1156 static struct mbuf * 1157 get_fl_payload(struct adapter *sc, struct sge_fl *fl, uint32_t len_newbuf, 1158 int *fl_bufs_used) 1159 { 1160 struct mbuf *m0, *m; 1161 struct fl_sdesc *sd = &fl->sdesc[fl->cidx]; 1162 unsigned int nbuf, len; 1163 1164 /* 1165 * No assertion for the fl lock because we don't need it. This routine 1166 * is called only from the rx interrupt handler and it only updates 1167 * fl->cidx. (Contrast that with fl->pidx/fl->needed which could be 1168 * updated in the rx interrupt handler or the starvation helper routine. 1169 * That's why code that manipulates fl->pidx/fl->needed needs the fl 1170 * lock but this routine does not). 1171 */ 1172 1173 if (__predict_false((len_newbuf & F_RSPD_NEWBUF) == 0)) 1174 panic("%s: cannot handle packed frames", __func__); 1175 len = G_RSPD_LEN(len_newbuf); 1176 1177 m0 = sd->m; 1178 sd->m = NULL; /* consumed */ 1179 1180 bus_dmamap_sync(fl->tag[sd->tag_idx], sd->map, BUS_DMASYNC_POSTREAD); 1181 m_init(m0, NULL, 0, M_NOWAIT, MT_DATA, M_PKTHDR); 1182 #ifdef T4_PKT_TIMESTAMP 1183 /* Leave room for a timestamp */ 1184 m0->m_data += 8; 1185 #endif 1186 1187 if (len < RX_COPY_THRESHOLD) { 1188 /* copy data to mbuf, buffer will be recycled */ 1189 bcopy(sd->cl, mtod(m0, caddr_t), len); 1190 m0->m_len = len; 1191 } else { 1192 bus_dmamap_unload(fl->tag[sd->tag_idx], sd->map); 1193 m_cljset(m0, sd->cl, FL_BUF_TYPE(sd->tag_idx)); 1194 sd->cl = NULL; /* consumed */ 1195 m0->m_len = min(len, FL_BUF_SIZE(sd->tag_idx)); 1196 } 1197 m0->m_pkthdr.len = len; 1198 1199 sd++; 1200 if (__predict_false(++fl->cidx == fl->cap)) { 1201 sd = fl->sdesc; 1202 fl->cidx = 0; 1203 } 1204 1205 m = m0; 1206 len -= m->m_len; 1207 nbuf = 1; /* # of fl buffers used */ 1208 1209 while (len > 0) { 1210 m->m_next = sd->m; 1211 sd->m = NULL; /* consumed */ 1212 m = m->m_next; 1213 1214 bus_dmamap_sync(fl->tag[sd->tag_idx], sd->map, 1215 BUS_DMASYNC_POSTREAD); 1216 1217 m_init(m, NULL, 0, M_NOWAIT, MT_DATA, 0); 1218 if (len <= MLEN) { 1219 bcopy(sd->cl, mtod(m, caddr_t), len); 1220 m->m_len = len; 1221 } else { 1222 bus_dmamap_unload(fl->tag[sd->tag_idx], 1223 sd->map); 1224 m_cljset(m, sd->cl, FL_BUF_TYPE(sd->tag_idx)); 1225 sd->cl = NULL; /* consumed */ 1226 m->m_len = min(len, FL_BUF_SIZE(sd->tag_idx)); 1227 } 1228 1229 sd++; 1230 if (__predict_false(++fl->cidx == fl->cap)) { 1231 sd = fl->sdesc; 1232 fl->cidx = 0; 1233 } 1234 1235 len -= m->m_len; 1236 nbuf++; 1237 } 1238 1239 (*fl_bufs_used) += nbuf; 1240 1241 return (m0); 1242 } 1243 1244 static int 1245 t4_eth_rx(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m0) 1246 { 1247 struct sge_rxq *rxq = iq_to_rxq(iq); 1248 struct ifnet *ifp = rxq->ifp; 1249 const struct cpl_rx_pkt *cpl = (const void *)(rss + 1); 1250 #if defined(INET) || defined(INET6) 1251 struct lro_ctrl *lro = &rxq->lro; 1252 #endif 1253 1254 KASSERT(m0 != NULL, ("%s: no payload with opcode %02x", __func__, 1255 rss->opcode)); 1256 1257 m0->m_pkthdr.len -= fl_pktshift; 1258 m0->m_len -= fl_pktshift; 1259 m0->m_data += fl_pktshift; 1260 1261 m0->m_pkthdr.rcvif = ifp; 1262 m0->m_flags |= M_FLOWID; 1263 m0->m_pkthdr.flowid = rss->hash_val; 1264 1265 if (cpl->csum_calc && !cpl->err_vec) { 1266 if (ifp->if_capenable & IFCAP_RXCSUM && 1267 cpl->l2info & htobe32(F_RXF_IP)) { 1268 m0->m_pkthdr.csum_flags = (CSUM_IP_CHECKED | 1269 CSUM_IP_VALID | CSUM_DATA_VALID | CSUM_PSEUDO_HDR); 1270 rxq->rxcsum++; 1271 } else if (ifp->if_capenable & IFCAP_RXCSUM_IPV6 && 1272 cpl->l2info & htobe32(F_RXF_IP6)) { 1273 m0->m_pkthdr.csum_flags = (CSUM_DATA_VALID_IPV6 | 1274 CSUM_PSEUDO_HDR); 1275 rxq->rxcsum++; 1276 } 1277 1278 if (__predict_false(cpl->ip_frag)) 1279 m0->m_pkthdr.csum_data = be16toh(cpl->csum); 1280 else 1281 m0->m_pkthdr.csum_data = 0xffff; 1282 } 1283 1284 if (cpl->vlan_ex) { 1285 m0->m_pkthdr.ether_vtag = be16toh(cpl->vlan); 1286 m0->m_flags |= M_VLANTAG; 1287 rxq->vlan_extraction++; 1288 } 1289 1290 #if defined(INET) || defined(INET6) 1291 if (cpl->l2info & htobe32(F_RXF_LRO) && 1292 iq->flags & IQ_LRO_ENABLED && 1293 tcp_lro_rx(lro, m0, 0) == 0) { 1294 /* queued for LRO */ 1295 } else 1296 #endif 1297 ifp->if_input(ifp, m0); 1298 1299 return (0); 1300 } 1301 1302 /* 1303 * Doesn't fail. Holds on to work requests it can't send right away. 1304 */ 1305 void 1306 t4_wrq_tx_locked(struct adapter *sc, struct sge_wrq *wrq, struct wrqe *wr) 1307 { 1308 struct sge_eq *eq = &wrq->eq; 1309 int can_reclaim; 1310 caddr_t dst; 1311 1312 TXQ_LOCK_ASSERT_OWNED(wrq); 1313 #ifdef TCP_OFFLOAD 1314 KASSERT((eq->flags & EQ_TYPEMASK) == EQ_OFLD || 1315 (eq->flags & EQ_TYPEMASK) == EQ_CTRL, 1316 ("%s: eq type %d", __func__, eq->flags & EQ_TYPEMASK)); 1317 #else 1318 KASSERT((eq->flags & EQ_TYPEMASK) == EQ_CTRL, 1319 ("%s: eq type %d", __func__, eq->flags & EQ_TYPEMASK)); 1320 #endif 1321 1322 if (__predict_true(wr != NULL)) 1323 STAILQ_INSERT_TAIL(&wrq->wr_list, wr, link); 1324 1325 can_reclaim = reclaimable(eq); 1326 if (__predict_false(eq->flags & EQ_STALLED)) { 1327 if (can_reclaim < tx_resume_threshold(eq)) 1328 return; 1329 eq->flags &= ~EQ_STALLED; 1330 eq->unstalled++; 1331 } 1332 eq->cidx += can_reclaim; 1333 eq->avail += can_reclaim; 1334 if (__predict_false(eq->cidx >= eq->cap)) 1335 eq->cidx -= eq->cap; 1336 1337 while ((wr = STAILQ_FIRST(&wrq->wr_list)) != NULL) { 1338 int ndesc; 1339 1340 if (__predict_false(wr->wr_len < 0 || 1341 wr->wr_len > SGE_MAX_WR_LEN || (wr->wr_len & 0x7))) { 1342 1343 #ifdef INVARIANTS 1344 panic("%s: work request with length %d", __func__, 1345 wr->wr_len); 1346 #endif 1347 #ifdef KDB 1348 kdb_backtrace(); 1349 #endif 1350 log(LOG_ERR, "%s: %s work request with length %d", 1351 device_get_nameunit(sc->dev), __func__, wr->wr_len); 1352 STAILQ_REMOVE_HEAD(&wrq->wr_list, link); 1353 free_wrqe(wr); 1354 continue; 1355 } 1356 1357 ndesc = howmany(wr->wr_len, EQ_ESIZE); 1358 if (eq->avail < ndesc) { 1359 wrq->no_desc++; 1360 break; 1361 } 1362 1363 dst = (void *)&eq->desc[eq->pidx]; 1364 copy_to_txd(eq, wrtod(wr), &dst, wr->wr_len); 1365 1366 eq->pidx += ndesc; 1367 eq->avail -= ndesc; 1368 if (__predict_false(eq->pidx >= eq->cap)) 1369 eq->pidx -= eq->cap; 1370 1371 eq->pending += ndesc; 1372 if (eq->pending >= 8) 1373 ring_eq_db(sc, eq); 1374 1375 wrq->tx_wrs++; 1376 STAILQ_REMOVE_HEAD(&wrq->wr_list, link); 1377 free_wrqe(wr); 1378 1379 if (eq->avail < 8) { 1380 can_reclaim = reclaimable(eq); 1381 eq->cidx += can_reclaim; 1382 eq->avail += can_reclaim; 1383 if (__predict_false(eq->cidx >= eq->cap)) 1384 eq->cidx -= eq->cap; 1385 } 1386 } 1387 1388 if (eq->pending) 1389 ring_eq_db(sc, eq); 1390 1391 if (wr != NULL) { 1392 eq->flags |= EQ_STALLED; 1393 if (callout_pending(&eq->tx_callout) == 0) 1394 callout_reset(&eq->tx_callout, 1, t4_tx_callout, eq); 1395 } 1396 } 1397 1398 /* Per-packet header in a coalesced tx WR, before the SGL starts (in flits) */ 1399 #define TXPKTS_PKT_HDR ((\ 1400 sizeof(struct ulp_txpkt) + \ 1401 sizeof(struct ulptx_idata) + \ 1402 sizeof(struct cpl_tx_pkt_core) \ 1403 ) / 8) 1404 1405 /* Header of a coalesced tx WR, before SGL of first packet (in flits) */ 1406 #define TXPKTS_WR_HDR (\ 1407 sizeof(struct fw_eth_tx_pkts_wr) / 8 + \ 1408 TXPKTS_PKT_HDR) 1409 1410 /* Header of a tx WR, before SGL of first packet (in flits) */ 1411 #define TXPKT_WR_HDR ((\ 1412 sizeof(struct fw_eth_tx_pkt_wr) + \ 1413 sizeof(struct cpl_tx_pkt_core) \ 1414 ) / 8 ) 1415 1416 /* Header of a tx LSO WR, before SGL of first packet (in flits) */ 1417 #define TXPKT_LSO_WR_HDR ((\ 1418 sizeof(struct fw_eth_tx_pkt_wr) + \ 1419 sizeof(struct cpl_tx_pkt_lso_core) + \ 1420 sizeof(struct cpl_tx_pkt_core) \ 1421 ) / 8 ) 1422 1423 int 1424 t4_eth_tx(struct ifnet *ifp, struct sge_txq *txq, struct mbuf *m) 1425 { 1426 struct port_info *pi = (void *)ifp->if_softc; 1427 struct adapter *sc = pi->adapter; 1428 struct sge_eq *eq = &txq->eq; 1429 struct buf_ring *br = txq->br; 1430 struct mbuf *next; 1431 int rc, coalescing, can_reclaim; 1432 struct txpkts txpkts; 1433 struct sgl sgl; 1434 1435 TXQ_LOCK_ASSERT_OWNED(txq); 1436 KASSERT(m, ("%s: called with nothing to do.", __func__)); 1437 KASSERT((eq->flags & EQ_TYPEMASK) == EQ_ETH, 1438 ("%s: eq type %d", __func__, eq->flags & EQ_TYPEMASK)); 1439 1440 prefetch(&eq->desc[eq->pidx]); 1441 prefetch(&txq->sdesc[eq->pidx]); 1442 1443 txpkts.npkt = 0;/* indicates there's nothing in txpkts */ 1444 coalescing = 0; 1445 1446 can_reclaim = reclaimable(eq); 1447 if (__predict_false(eq->flags & EQ_STALLED)) { 1448 if (can_reclaim < tx_resume_threshold(eq)) { 1449 txq->m = m; 1450 return (0); 1451 } 1452 eq->flags &= ~EQ_STALLED; 1453 eq->unstalled++; 1454 } 1455 1456 if (__predict_false(eq->flags & EQ_DOOMED)) { 1457 m_freem(m); 1458 while ((m = buf_ring_dequeue_sc(txq->br)) != NULL) 1459 m_freem(m); 1460 return (ENETDOWN); 1461 } 1462 1463 if (eq->avail < 8 && can_reclaim) 1464 reclaim_tx_descs(txq, can_reclaim, 32); 1465 1466 for (; m; m = next ? next : drbr_dequeue(ifp, br)) { 1467 1468 if (eq->avail < 8) 1469 break; 1470 1471 next = m->m_nextpkt; 1472 m->m_nextpkt = NULL; 1473 1474 if (next || buf_ring_peek(br)) 1475 coalescing = 1; 1476 1477 rc = get_pkt_sgl(txq, &m, &sgl, coalescing); 1478 if (rc != 0) { 1479 if (rc == ENOMEM) { 1480 1481 /* Short of resources, suspend tx */ 1482 1483 m->m_nextpkt = next; 1484 break; 1485 } 1486 1487 /* 1488 * Unrecoverable error for this packet, throw it away 1489 * and move on to the next. get_pkt_sgl may already 1490 * have freed m (it will be NULL in that case and the 1491 * m_freem here is still safe). 1492 */ 1493 1494 m_freem(m); 1495 continue; 1496 } 1497 1498 if (coalescing && 1499 add_to_txpkts(pi, txq, &txpkts, m, &sgl) == 0) { 1500 1501 /* Successfully absorbed into txpkts */ 1502 1503 write_ulp_cpl_sgl(pi, txq, &txpkts, m, &sgl); 1504 goto doorbell; 1505 } 1506 1507 /* 1508 * We weren't coalescing to begin with, or current frame could 1509 * not be coalesced (add_to_txpkts flushes txpkts if a frame 1510 * given to it can't be coalesced). Either way there should be 1511 * nothing in txpkts. 1512 */ 1513 KASSERT(txpkts.npkt == 0, 1514 ("%s: txpkts not empty: %d", __func__, txpkts.npkt)); 1515 1516 /* We're sending out individual packets now */ 1517 coalescing = 0; 1518 1519 if (eq->avail < 8) 1520 reclaim_tx_descs(txq, 0, 8); 1521 rc = write_txpkt_wr(pi, txq, m, &sgl); 1522 if (rc != 0) { 1523 1524 /* Short of hardware descriptors, suspend tx */ 1525 1526 /* 1527 * This is an unlikely but expensive failure. We've 1528 * done all the hard work (DMA mappings etc.) and now we 1529 * can't send out the packet. What's worse, we have to 1530 * spend even more time freeing up everything in sgl. 1531 */ 1532 txq->no_desc++; 1533 free_pkt_sgl(txq, &sgl); 1534 1535 m->m_nextpkt = next; 1536 break; 1537 } 1538 1539 ETHER_BPF_MTAP(ifp, m); 1540 if (sgl.nsegs == 0) 1541 m_freem(m); 1542 doorbell: 1543 if (eq->pending >= 8) 1544 ring_eq_db(sc, eq); 1545 1546 can_reclaim = reclaimable(eq); 1547 if (can_reclaim >= 32) 1548 reclaim_tx_descs(txq, can_reclaim, 64); 1549 } 1550 1551 if (txpkts.npkt > 0) 1552 write_txpkts_wr(txq, &txpkts); 1553 1554 /* 1555 * m not NULL means there was an error but we haven't thrown it away. 1556 * This can happen when we're short of tx descriptors (no_desc) or maybe 1557 * even DMA maps (no_dmamap). Either way, a credit flush and reclaim 1558 * will get things going again. 1559 */ 1560 if (m && !(eq->flags & EQ_CRFLUSHED)) { 1561 struct tx_sdesc *txsd = &txq->sdesc[eq->pidx]; 1562 1563 /* 1564 * If EQ_CRFLUSHED is not set then we know we have at least one 1565 * available descriptor because any WR that reduces eq->avail to 1566 * 0 also sets EQ_CRFLUSHED. 1567 */ 1568 KASSERT(eq->avail > 0, ("%s: no space for eqflush.", __func__)); 1569 1570 txsd->desc_used = 1; 1571 txsd->credits = 0; 1572 write_eqflush_wr(eq); 1573 } 1574 txq->m = m; 1575 1576 if (eq->pending) 1577 ring_eq_db(sc, eq); 1578 1579 reclaim_tx_descs(txq, 0, 128); 1580 1581 if (eq->flags & EQ_STALLED && callout_pending(&eq->tx_callout) == 0) 1582 callout_reset(&eq->tx_callout, 1, t4_tx_callout, eq); 1583 1584 return (0); 1585 } 1586 1587 void 1588 t4_update_fl_bufsize(struct ifnet *ifp) 1589 { 1590 struct port_info *pi = ifp->if_softc; 1591 struct sge_rxq *rxq; 1592 #ifdef TCP_OFFLOAD 1593 struct sge_ofld_rxq *ofld_rxq; 1594 #endif 1595 struct sge_fl *fl; 1596 int i, bufsize; 1597 1598 bufsize = mtu_to_bufsize(ifp->if_mtu); 1599 for_each_rxq(pi, i, rxq) { 1600 fl = &rxq->fl; 1601 1602 FL_LOCK(fl); 1603 set_fl_tag_idx(fl, bufsize); 1604 FL_UNLOCK(fl); 1605 } 1606 #ifdef TCP_OFFLOAD 1607 bufsize = mtu_to_bufsize_toe(pi->adapter, ifp->if_mtu); 1608 for_each_ofld_rxq(pi, i, ofld_rxq) { 1609 fl = &ofld_rxq->fl; 1610 1611 FL_LOCK(fl); 1612 set_fl_tag_idx(fl, bufsize); 1613 FL_UNLOCK(fl); 1614 } 1615 #endif 1616 } 1617 1618 int 1619 can_resume_tx(struct sge_eq *eq) 1620 { 1621 return (reclaimable(eq) >= tx_resume_threshold(eq)); 1622 } 1623 1624 static inline void 1625 init_iq(struct sge_iq *iq, struct adapter *sc, int tmr_idx, int pktc_idx, 1626 int qsize, int esize) 1627 { 1628 KASSERT(tmr_idx >= 0 && tmr_idx < SGE_NTIMERS, 1629 ("%s: bad tmr_idx %d", __func__, tmr_idx)); 1630 KASSERT(pktc_idx < SGE_NCOUNTERS, /* -ve is ok, means don't use */ 1631 ("%s: bad pktc_idx %d", __func__, pktc_idx)); 1632 1633 iq->flags = 0; 1634 iq->adapter = sc; 1635 iq->intr_params = V_QINTR_TIMER_IDX(tmr_idx); 1636 iq->intr_pktc_idx = SGE_NCOUNTERS - 1; 1637 if (pktc_idx >= 0) { 1638 iq->intr_params |= F_QINTR_CNT_EN; 1639 iq->intr_pktc_idx = pktc_idx; 1640 } 1641 iq->qsize = roundup2(qsize, 16); /* See FW_IQ_CMD/iqsize */ 1642 iq->esize = max(esize, 16); /* See FW_IQ_CMD/iqesize */ 1643 } 1644 1645 static inline void 1646 init_fl(struct sge_fl *fl, int qsize, int bufsize, char *name) 1647 { 1648 fl->qsize = qsize; 1649 strlcpy(fl->lockname, name, sizeof(fl->lockname)); 1650 set_fl_tag_idx(fl, bufsize); 1651 } 1652 1653 static inline void 1654 init_eq(struct sge_eq *eq, int eqtype, int qsize, uint8_t tx_chan, 1655 uint16_t iqid, char *name) 1656 { 1657 KASSERT(tx_chan < NCHAN, ("%s: bad tx channel %d", __func__, tx_chan)); 1658 KASSERT(eqtype <= EQ_TYPEMASK, ("%s: bad qtype %d", __func__, eqtype)); 1659 1660 eq->flags = eqtype & EQ_TYPEMASK; 1661 eq->tx_chan = tx_chan; 1662 eq->iqid = iqid; 1663 eq->qsize = qsize; 1664 strlcpy(eq->lockname, name, sizeof(eq->lockname)); 1665 1666 TASK_INIT(&eq->tx_task, 0, t4_tx_task, eq); 1667 callout_init(&eq->tx_callout, CALLOUT_MPSAFE); 1668 } 1669 1670 static int 1671 alloc_ring(struct adapter *sc, size_t len, bus_dma_tag_t *tag, 1672 bus_dmamap_t *map, bus_addr_t *pa, void **va) 1673 { 1674 int rc; 1675 1676 rc = bus_dma_tag_create(sc->dmat, 512, 0, BUS_SPACE_MAXADDR, 1677 BUS_SPACE_MAXADDR, NULL, NULL, len, 1, len, 0, NULL, NULL, tag); 1678 if (rc != 0) { 1679 device_printf(sc->dev, "cannot allocate DMA tag: %d\n", rc); 1680 goto done; 1681 } 1682 1683 rc = bus_dmamem_alloc(*tag, va, 1684 BUS_DMA_WAITOK | BUS_DMA_COHERENT | BUS_DMA_ZERO, map); 1685 if (rc != 0) { 1686 device_printf(sc->dev, "cannot allocate DMA memory: %d\n", rc); 1687 goto done; 1688 } 1689 1690 rc = bus_dmamap_load(*tag, *map, *va, len, oneseg_dma_callback, pa, 0); 1691 if (rc != 0) { 1692 device_printf(sc->dev, "cannot load DMA map: %d\n", rc); 1693 goto done; 1694 } 1695 done: 1696 if (rc) 1697 free_ring(sc, *tag, *map, *pa, *va); 1698 1699 return (rc); 1700 } 1701 1702 static int 1703 free_ring(struct adapter *sc, bus_dma_tag_t tag, bus_dmamap_t map, 1704 bus_addr_t pa, void *va) 1705 { 1706 if (pa) 1707 bus_dmamap_unload(tag, map); 1708 if (va) 1709 bus_dmamem_free(tag, va, map); 1710 if (tag) 1711 bus_dma_tag_destroy(tag); 1712 1713 return (0); 1714 } 1715 1716 /* 1717 * Allocates the ring for an ingress queue and an optional freelist. If the 1718 * freelist is specified it will be allocated and then associated with the 1719 * ingress queue. 1720 * 1721 * Returns errno on failure. Resources allocated up to that point may still be 1722 * allocated. Caller is responsible for cleanup in case this function fails. 1723 * 1724 * If the ingress queue will take interrupts directly (iq->flags & IQ_INTR) then 1725 * the intr_idx specifies the vector, starting from 0. Otherwise it specifies 1726 * the abs_id of the ingress queue to which its interrupts should be forwarded. 1727 */ 1728 static int 1729 alloc_iq_fl(struct port_info *pi, struct sge_iq *iq, struct sge_fl *fl, 1730 int intr_idx, int cong) 1731 { 1732 int rc, i, cntxt_id; 1733 size_t len; 1734 struct fw_iq_cmd c; 1735 struct adapter *sc = iq->adapter; 1736 __be32 v = 0; 1737 1738 len = iq->qsize * iq->esize; 1739 rc = alloc_ring(sc, len, &iq->desc_tag, &iq->desc_map, &iq->ba, 1740 (void **)&iq->desc); 1741 if (rc != 0) 1742 return (rc); 1743 1744 bzero(&c, sizeof(c)); 1745 c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_IQ_CMD) | F_FW_CMD_REQUEST | 1746 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_IQ_CMD_PFN(sc->pf) | 1747 V_FW_IQ_CMD_VFN(0)); 1748 1749 c.alloc_to_len16 = htobe32(F_FW_IQ_CMD_ALLOC | F_FW_IQ_CMD_IQSTART | 1750 FW_LEN16(c)); 1751 1752 /* Special handling for firmware event queue */ 1753 if (iq == &sc->sge.fwq) 1754 v |= F_FW_IQ_CMD_IQASYNCH; 1755 1756 if (iq->flags & IQ_INTR) { 1757 KASSERT(intr_idx < sc->intr_count, 1758 ("%s: invalid direct intr_idx %d", __func__, intr_idx)); 1759 } else 1760 v |= F_FW_IQ_CMD_IQANDST; 1761 v |= V_FW_IQ_CMD_IQANDSTINDEX(intr_idx); 1762 1763 c.type_to_iqandstindex = htobe32(v | 1764 V_FW_IQ_CMD_TYPE(FW_IQ_TYPE_FL_INT_CAP) | 1765 V_FW_IQ_CMD_VIID(pi->viid) | 1766 V_FW_IQ_CMD_IQANUD(X_UPDATEDELIVERY_INTERRUPT)); 1767 c.iqdroprss_to_iqesize = htobe16(V_FW_IQ_CMD_IQPCIECH(pi->tx_chan) | 1768 F_FW_IQ_CMD_IQGTSMODE | 1769 V_FW_IQ_CMD_IQINTCNTTHRESH(iq->intr_pktc_idx) | 1770 V_FW_IQ_CMD_IQESIZE(ilog2(iq->esize) - 4)); 1771 c.iqsize = htobe16(iq->qsize); 1772 c.iqaddr = htobe64(iq->ba); 1773 if (cong >= 0) 1774 c.iqns_to_fl0congen = htobe32(F_FW_IQ_CMD_IQFLINTCONGEN); 1775 1776 if (fl) { 1777 mtx_init(&fl->fl_lock, fl->lockname, NULL, MTX_DEF); 1778 1779 for (i = 0; i < FL_BUF_SIZES; i++) { 1780 1781 /* 1782 * A freelist buffer must be 16 byte aligned as the SGE 1783 * uses the low 4 bits of the bus addr to figure out the 1784 * buffer size. 1785 */ 1786 rc = bus_dma_tag_create(sc->dmat, 16, 0, 1787 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 1788 FL_BUF_SIZE(i), 1, FL_BUF_SIZE(i), BUS_DMA_ALLOCNOW, 1789 NULL, NULL, &fl->tag[i]); 1790 if (rc != 0) { 1791 device_printf(sc->dev, 1792 "failed to create fl DMA tag[%d]: %d\n", 1793 i, rc); 1794 return (rc); 1795 } 1796 } 1797 len = fl->qsize * RX_FL_ESIZE; 1798 rc = alloc_ring(sc, len, &fl->desc_tag, &fl->desc_map, 1799 &fl->ba, (void **)&fl->desc); 1800 if (rc) 1801 return (rc); 1802 1803 /* Allocate space for one software descriptor per buffer. */ 1804 fl->cap = (fl->qsize - spg_len / RX_FL_ESIZE) * 8; 1805 FL_LOCK(fl); 1806 rc = alloc_fl_sdesc(fl); 1807 FL_UNLOCK(fl); 1808 if (rc != 0) { 1809 device_printf(sc->dev, 1810 "failed to setup fl software descriptors: %d\n", 1811 rc); 1812 return (rc); 1813 } 1814 fl->needed = fl->cap; 1815 fl->lowat = roundup2(sc->sge.fl_starve_threshold, 8); 1816 1817 c.iqns_to_fl0congen |= 1818 htobe32(V_FW_IQ_CMD_FL0HOSTFCMODE(X_HOSTFCMODE_NONE) | 1819 F_FW_IQ_CMD_FL0FETCHRO | F_FW_IQ_CMD_FL0DATARO | 1820 F_FW_IQ_CMD_FL0PADEN); 1821 if (cong >= 0) { 1822 c.iqns_to_fl0congen |= 1823 htobe32(V_FW_IQ_CMD_FL0CNGCHMAP(cong) | 1824 F_FW_IQ_CMD_FL0CONGCIF | 1825 F_FW_IQ_CMD_FL0CONGEN); 1826 } 1827 c.fl0dcaen_to_fl0cidxfthresh = 1828 htobe16(V_FW_IQ_CMD_FL0FBMIN(X_FETCHBURSTMIN_64B) | 1829 V_FW_IQ_CMD_FL0FBMAX(X_FETCHBURSTMAX_512B)); 1830 c.fl0size = htobe16(fl->qsize); 1831 c.fl0addr = htobe64(fl->ba); 1832 } 1833 1834 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c); 1835 if (rc != 0) { 1836 device_printf(sc->dev, 1837 "failed to create ingress queue: %d\n", rc); 1838 return (rc); 1839 } 1840 1841 iq->cdesc = iq->desc; 1842 iq->cidx = 0; 1843 iq->gen = 1; 1844 iq->intr_next = iq->intr_params; 1845 iq->cntxt_id = be16toh(c.iqid); 1846 iq->abs_id = be16toh(c.physiqid); 1847 iq->flags |= IQ_ALLOCATED; 1848 1849 cntxt_id = iq->cntxt_id - sc->sge.iq_start; 1850 if (cntxt_id >= sc->sge.niq) { 1851 panic ("%s: iq->cntxt_id (%d) more than the max (%d)", __func__, 1852 cntxt_id, sc->sge.niq - 1); 1853 } 1854 sc->sge.iqmap[cntxt_id] = iq; 1855 1856 if (fl) { 1857 fl->cntxt_id = be16toh(c.fl0id); 1858 fl->pidx = fl->cidx = 0; 1859 1860 cntxt_id = fl->cntxt_id - sc->sge.eq_start; 1861 if (cntxt_id >= sc->sge.neq) { 1862 panic("%s: fl->cntxt_id (%d) more than the max (%d)", 1863 __func__, cntxt_id, sc->sge.neq - 1); 1864 } 1865 sc->sge.eqmap[cntxt_id] = (void *)fl; 1866 1867 FL_LOCK(fl); 1868 /* Enough to make sure the SGE doesn't think it's starved */ 1869 refill_fl(sc, fl, fl->lowat); 1870 FL_UNLOCK(fl); 1871 1872 iq->flags |= IQ_HAS_FL; 1873 } 1874 1875 if (is_t5(sc) && cong >= 0) { 1876 uint32_t param, val; 1877 1878 param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ) | 1879 V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DMAQ_CONM_CTXT) | 1880 V_FW_PARAMS_PARAM_YZ(iq->cntxt_id); 1881 if (cong == 0) 1882 val = 1 << 19; 1883 else { 1884 val = 2 << 19; 1885 for (i = 0; i < 4; i++) { 1886 if (cong & (1 << i)) 1887 val |= 1 << (i << 2); 1888 } 1889 } 1890 1891 rc = -t4_set_params(sc, sc->mbox, sc->pf, 0, 1, ¶m, &val); 1892 if (rc != 0) { 1893 /* report error but carry on */ 1894 device_printf(sc->dev, 1895 "failed to set congestion manager context for " 1896 "ingress queue %d: %d\n", iq->cntxt_id, rc); 1897 } 1898 } 1899 1900 /* Enable IQ interrupts */ 1901 atomic_store_rel_int(&iq->state, IQS_IDLE); 1902 t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS), V_SEINTARM(iq->intr_params) | 1903 V_INGRESSQID(iq->cntxt_id)); 1904 1905 return (0); 1906 } 1907 1908 static int 1909 free_iq_fl(struct port_info *pi, struct sge_iq *iq, struct sge_fl *fl) 1910 { 1911 int i, rc; 1912 struct adapter *sc = iq->adapter; 1913 device_t dev; 1914 1915 if (sc == NULL) 1916 return (0); /* nothing to do */ 1917 1918 dev = pi ? pi->dev : sc->dev; 1919 1920 if (iq->flags & IQ_ALLOCATED) { 1921 rc = -t4_iq_free(sc, sc->mbox, sc->pf, 0, 1922 FW_IQ_TYPE_FL_INT_CAP, iq->cntxt_id, 1923 fl ? fl->cntxt_id : 0xffff, 0xffff); 1924 if (rc != 0) { 1925 device_printf(dev, 1926 "failed to free queue %p: %d\n", iq, rc); 1927 return (rc); 1928 } 1929 iq->flags &= ~IQ_ALLOCATED; 1930 } 1931 1932 free_ring(sc, iq->desc_tag, iq->desc_map, iq->ba, iq->desc); 1933 1934 bzero(iq, sizeof(*iq)); 1935 1936 if (fl) { 1937 free_ring(sc, fl->desc_tag, fl->desc_map, fl->ba, 1938 fl->desc); 1939 1940 if (fl->sdesc) { 1941 FL_LOCK(fl); 1942 free_fl_sdesc(fl); 1943 FL_UNLOCK(fl); 1944 } 1945 1946 if (mtx_initialized(&fl->fl_lock)) 1947 mtx_destroy(&fl->fl_lock); 1948 1949 for (i = 0; i < FL_BUF_SIZES; i++) { 1950 if (fl->tag[i]) 1951 bus_dma_tag_destroy(fl->tag[i]); 1952 } 1953 1954 bzero(fl, sizeof(*fl)); 1955 } 1956 1957 return (0); 1958 } 1959 1960 static int 1961 alloc_fwq(struct adapter *sc) 1962 { 1963 int rc, intr_idx; 1964 struct sge_iq *fwq = &sc->sge.fwq; 1965 struct sysctl_oid *oid = device_get_sysctl_tree(sc->dev); 1966 struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid); 1967 1968 init_iq(fwq, sc, 0, 0, FW_IQ_QSIZE, FW_IQ_ESIZE); 1969 fwq->flags |= IQ_INTR; /* always */ 1970 intr_idx = sc->intr_count > 1 ? 1 : 0; 1971 rc = alloc_iq_fl(sc->port[0], fwq, NULL, intr_idx, -1); 1972 if (rc != 0) { 1973 device_printf(sc->dev, 1974 "failed to create firmware event queue: %d\n", rc); 1975 return (rc); 1976 } 1977 1978 oid = SYSCTL_ADD_NODE(&sc->ctx, children, OID_AUTO, "fwq", CTLFLAG_RD, 1979 NULL, "firmware event queue"); 1980 children = SYSCTL_CHILDREN(oid); 1981 1982 SYSCTL_ADD_PROC(&sc->ctx, children, OID_AUTO, "abs_id", 1983 CTLTYPE_INT | CTLFLAG_RD, &fwq->abs_id, 0, sysctl_uint16, "I", 1984 "absolute id of the queue"); 1985 SYSCTL_ADD_PROC(&sc->ctx, children, OID_AUTO, "cntxt_id", 1986 CTLTYPE_INT | CTLFLAG_RD, &fwq->cntxt_id, 0, sysctl_uint16, "I", 1987 "SGE context id of the queue"); 1988 SYSCTL_ADD_PROC(&sc->ctx, children, OID_AUTO, "cidx", 1989 CTLTYPE_INT | CTLFLAG_RD, &fwq->cidx, 0, sysctl_uint16, "I", 1990 "consumer index"); 1991 1992 return (0); 1993 } 1994 1995 static int 1996 free_fwq(struct adapter *sc) 1997 { 1998 return free_iq_fl(NULL, &sc->sge.fwq, NULL); 1999 } 2000 2001 static int 2002 alloc_mgmtq(struct adapter *sc) 2003 { 2004 int rc; 2005 struct sge_wrq *mgmtq = &sc->sge.mgmtq; 2006 char name[16]; 2007 struct sysctl_oid *oid = device_get_sysctl_tree(sc->dev); 2008 struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid); 2009 2010 oid = SYSCTL_ADD_NODE(&sc->ctx, children, OID_AUTO, "mgmtq", CTLFLAG_RD, 2011 NULL, "management queue"); 2012 2013 snprintf(name, sizeof(name), "%s mgmtq", device_get_nameunit(sc->dev)); 2014 init_eq(&mgmtq->eq, EQ_CTRL, CTRL_EQ_QSIZE, sc->port[0]->tx_chan, 2015 sc->sge.fwq.cntxt_id, name); 2016 rc = alloc_wrq(sc, NULL, mgmtq, oid); 2017 if (rc != 0) { 2018 device_printf(sc->dev, 2019 "failed to create management queue: %d\n", rc); 2020 return (rc); 2021 } 2022 2023 return (0); 2024 } 2025 2026 static int 2027 free_mgmtq(struct adapter *sc) 2028 { 2029 2030 return free_wrq(sc, &sc->sge.mgmtq); 2031 } 2032 2033 static inline int 2034 tnl_cong(struct port_info *pi) 2035 { 2036 2037 if (cong_drop == -1) 2038 return (-1); 2039 else if (cong_drop == 1) 2040 return (0); 2041 else 2042 return (1 << pi->tx_chan); 2043 } 2044 2045 static int 2046 alloc_rxq(struct port_info *pi, struct sge_rxq *rxq, int intr_idx, int idx, 2047 struct sysctl_oid *oid) 2048 { 2049 int rc; 2050 struct sysctl_oid_list *children; 2051 char name[16]; 2052 2053 rc = alloc_iq_fl(pi, &rxq->iq, &rxq->fl, intr_idx, tnl_cong(pi)); 2054 if (rc != 0) 2055 return (rc); 2056 2057 FL_LOCK(&rxq->fl); 2058 refill_fl(pi->adapter, &rxq->fl, rxq->fl.needed / 8); 2059 FL_UNLOCK(&rxq->fl); 2060 2061 #if defined(INET) || defined(INET6) 2062 rc = tcp_lro_init(&rxq->lro); 2063 if (rc != 0) 2064 return (rc); 2065 rxq->lro.ifp = pi->ifp; /* also indicates LRO init'ed */ 2066 2067 if (pi->ifp->if_capenable & IFCAP_LRO) 2068 rxq->iq.flags |= IQ_LRO_ENABLED; 2069 #endif 2070 rxq->ifp = pi->ifp; 2071 2072 children = SYSCTL_CHILDREN(oid); 2073 2074 snprintf(name, sizeof(name), "%d", idx); 2075 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, name, CTLFLAG_RD, 2076 NULL, "rx queue"); 2077 children = SYSCTL_CHILDREN(oid); 2078 2079 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "abs_id", 2080 CTLTYPE_INT | CTLFLAG_RD, &rxq->iq.abs_id, 0, sysctl_uint16, "I", 2081 "absolute id of the queue"); 2082 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cntxt_id", 2083 CTLTYPE_INT | CTLFLAG_RD, &rxq->iq.cntxt_id, 0, sysctl_uint16, "I", 2084 "SGE context id of the queue"); 2085 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cidx", 2086 CTLTYPE_INT | CTLFLAG_RD, &rxq->iq.cidx, 0, sysctl_uint16, "I", 2087 "consumer index"); 2088 #if defined(INET) || defined(INET6) 2089 SYSCTL_ADD_INT(&pi->ctx, children, OID_AUTO, "lro_queued", CTLFLAG_RD, 2090 &rxq->lro.lro_queued, 0, NULL); 2091 SYSCTL_ADD_INT(&pi->ctx, children, OID_AUTO, "lro_flushed", CTLFLAG_RD, 2092 &rxq->lro.lro_flushed, 0, NULL); 2093 #endif 2094 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "rxcsum", CTLFLAG_RD, 2095 &rxq->rxcsum, "# of times hardware assisted with checksum"); 2096 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "vlan_extraction", 2097 CTLFLAG_RD, &rxq->vlan_extraction, 2098 "# of times hardware extracted 802.1Q tag"); 2099 2100 children = SYSCTL_CHILDREN(oid); 2101 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "fl", CTLFLAG_RD, 2102 NULL, "freelist"); 2103 children = SYSCTL_CHILDREN(oid); 2104 2105 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cntxt_id", 2106 CTLTYPE_INT | CTLFLAG_RD, &rxq->fl.cntxt_id, 0, sysctl_uint16, "I", 2107 "SGE context id of the queue"); 2108 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "cidx", CTLFLAG_RD, 2109 &rxq->fl.cidx, 0, "consumer index"); 2110 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "pidx", CTLFLAG_RD, 2111 &rxq->fl.pidx, 0, "producer index"); 2112 2113 return (rc); 2114 } 2115 2116 static int 2117 free_rxq(struct port_info *pi, struct sge_rxq *rxq) 2118 { 2119 int rc; 2120 2121 #if defined(INET) || defined(INET6) 2122 if (rxq->lro.ifp) { 2123 tcp_lro_free(&rxq->lro); 2124 rxq->lro.ifp = NULL; 2125 } 2126 #endif 2127 2128 rc = free_iq_fl(pi, &rxq->iq, &rxq->fl); 2129 if (rc == 0) 2130 bzero(rxq, sizeof(*rxq)); 2131 2132 return (rc); 2133 } 2134 2135 #ifdef TCP_OFFLOAD 2136 static int 2137 alloc_ofld_rxq(struct port_info *pi, struct sge_ofld_rxq *ofld_rxq, 2138 int intr_idx, int idx, struct sysctl_oid *oid) 2139 { 2140 int rc; 2141 struct sysctl_oid_list *children; 2142 char name[16]; 2143 2144 rc = alloc_iq_fl(pi, &ofld_rxq->iq, &ofld_rxq->fl, intr_idx, 2145 1 << pi->tx_chan); 2146 if (rc != 0) 2147 return (rc); 2148 2149 children = SYSCTL_CHILDREN(oid); 2150 2151 snprintf(name, sizeof(name), "%d", idx); 2152 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, name, CTLFLAG_RD, 2153 NULL, "rx queue"); 2154 children = SYSCTL_CHILDREN(oid); 2155 2156 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "abs_id", 2157 CTLTYPE_INT | CTLFLAG_RD, &ofld_rxq->iq.abs_id, 0, sysctl_uint16, 2158 "I", "absolute id of the queue"); 2159 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cntxt_id", 2160 CTLTYPE_INT | CTLFLAG_RD, &ofld_rxq->iq.cntxt_id, 0, sysctl_uint16, 2161 "I", "SGE context id of the queue"); 2162 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cidx", 2163 CTLTYPE_INT | CTLFLAG_RD, &ofld_rxq->iq.cidx, 0, sysctl_uint16, "I", 2164 "consumer index"); 2165 2166 children = SYSCTL_CHILDREN(oid); 2167 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "fl", CTLFLAG_RD, 2168 NULL, "freelist"); 2169 children = SYSCTL_CHILDREN(oid); 2170 2171 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cntxt_id", 2172 CTLTYPE_INT | CTLFLAG_RD, &ofld_rxq->fl.cntxt_id, 0, sysctl_uint16, 2173 "I", "SGE context id of the queue"); 2174 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "cidx", CTLFLAG_RD, 2175 &ofld_rxq->fl.cidx, 0, "consumer index"); 2176 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "pidx", CTLFLAG_RD, 2177 &ofld_rxq->fl.pidx, 0, "producer index"); 2178 2179 return (rc); 2180 } 2181 2182 static int 2183 free_ofld_rxq(struct port_info *pi, struct sge_ofld_rxq *ofld_rxq) 2184 { 2185 int rc; 2186 2187 rc = free_iq_fl(pi, &ofld_rxq->iq, &ofld_rxq->fl); 2188 if (rc == 0) 2189 bzero(ofld_rxq, sizeof(*ofld_rxq)); 2190 2191 return (rc); 2192 } 2193 #endif 2194 2195 static int 2196 ctrl_eq_alloc(struct adapter *sc, struct sge_eq *eq) 2197 { 2198 int rc, cntxt_id; 2199 struct fw_eq_ctrl_cmd c; 2200 2201 bzero(&c, sizeof(c)); 2202 2203 c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_EQ_CTRL_CMD) | F_FW_CMD_REQUEST | 2204 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_EQ_CTRL_CMD_PFN(sc->pf) | 2205 V_FW_EQ_CTRL_CMD_VFN(0)); 2206 c.alloc_to_len16 = htobe32(F_FW_EQ_CTRL_CMD_ALLOC | 2207 F_FW_EQ_CTRL_CMD_EQSTART | FW_LEN16(c)); 2208 c.cmpliqid_eqid = htonl(V_FW_EQ_CTRL_CMD_CMPLIQID(eq->iqid)); /* XXX */ 2209 c.physeqid_pkd = htobe32(0); 2210 c.fetchszm_to_iqid = 2211 htobe32(V_FW_EQ_CTRL_CMD_HOSTFCMODE(X_HOSTFCMODE_STATUS_PAGE) | 2212 V_FW_EQ_CTRL_CMD_PCIECHN(eq->tx_chan) | 2213 F_FW_EQ_CTRL_CMD_FETCHRO | V_FW_EQ_CTRL_CMD_IQID(eq->iqid)); 2214 c.dcaen_to_eqsize = 2215 htobe32(V_FW_EQ_CTRL_CMD_FBMIN(X_FETCHBURSTMIN_64B) | 2216 V_FW_EQ_CTRL_CMD_FBMAX(X_FETCHBURSTMAX_512B) | 2217 V_FW_EQ_CTRL_CMD_CIDXFTHRESH(X_CIDXFLUSHTHRESH_32) | 2218 V_FW_EQ_CTRL_CMD_EQSIZE(eq->qsize)); 2219 c.eqaddr = htobe64(eq->ba); 2220 2221 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c); 2222 if (rc != 0) { 2223 device_printf(sc->dev, 2224 "failed to create control queue %d: %d\n", eq->tx_chan, rc); 2225 return (rc); 2226 } 2227 eq->flags |= EQ_ALLOCATED; 2228 2229 eq->cntxt_id = G_FW_EQ_CTRL_CMD_EQID(be32toh(c.cmpliqid_eqid)); 2230 cntxt_id = eq->cntxt_id - sc->sge.eq_start; 2231 if (cntxt_id >= sc->sge.neq) 2232 panic("%s: eq->cntxt_id (%d) more than the max (%d)", __func__, 2233 cntxt_id, sc->sge.neq - 1); 2234 sc->sge.eqmap[cntxt_id] = eq; 2235 2236 return (rc); 2237 } 2238 2239 static int 2240 eth_eq_alloc(struct adapter *sc, struct port_info *pi, struct sge_eq *eq) 2241 { 2242 int rc, cntxt_id; 2243 struct fw_eq_eth_cmd c; 2244 2245 bzero(&c, sizeof(c)); 2246 2247 c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_EQ_ETH_CMD) | F_FW_CMD_REQUEST | 2248 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_EQ_ETH_CMD_PFN(sc->pf) | 2249 V_FW_EQ_ETH_CMD_VFN(0)); 2250 c.alloc_to_len16 = htobe32(F_FW_EQ_ETH_CMD_ALLOC | 2251 F_FW_EQ_ETH_CMD_EQSTART | FW_LEN16(c)); 2252 c.viid_pkd = htobe32(V_FW_EQ_ETH_CMD_VIID(pi->viid)); 2253 c.fetchszm_to_iqid = 2254 htobe32(V_FW_EQ_ETH_CMD_HOSTFCMODE(X_HOSTFCMODE_STATUS_PAGE) | 2255 V_FW_EQ_ETH_CMD_PCIECHN(eq->tx_chan) | F_FW_EQ_ETH_CMD_FETCHRO | 2256 V_FW_EQ_ETH_CMD_IQID(eq->iqid)); 2257 c.dcaen_to_eqsize = htobe32(V_FW_EQ_ETH_CMD_FBMIN(X_FETCHBURSTMIN_64B) | 2258 V_FW_EQ_ETH_CMD_FBMAX(X_FETCHBURSTMAX_512B) | 2259 V_FW_EQ_ETH_CMD_CIDXFTHRESH(X_CIDXFLUSHTHRESH_32) | 2260 V_FW_EQ_ETH_CMD_EQSIZE(eq->qsize)); 2261 c.eqaddr = htobe64(eq->ba); 2262 2263 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c); 2264 if (rc != 0) { 2265 device_printf(pi->dev, 2266 "failed to create Ethernet egress queue: %d\n", rc); 2267 return (rc); 2268 } 2269 eq->flags |= EQ_ALLOCATED; 2270 2271 eq->cntxt_id = G_FW_EQ_ETH_CMD_EQID(be32toh(c.eqid_pkd)); 2272 cntxt_id = eq->cntxt_id - sc->sge.eq_start; 2273 if (cntxt_id >= sc->sge.neq) 2274 panic("%s: eq->cntxt_id (%d) more than the max (%d)", __func__, 2275 cntxt_id, sc->sge.neq - 1); 2276 sc->sge.eqmap[cntxt_id] = eq; 2277 2278 return (rc); 2279 } 2280 2281 #ifdef TCP_OFFLOAD 2282 static int 2283 ofld_eq_alloc(struct adapter *sc, struct port_info *pi, struct sge_eq *eq) 2284 { 2285 int rc, cntxt_id; 2286 struct fw_eq_ofld_cmd c; 2287 2288 bzero(&c, sizeof(c)); 2289 2290 c.op_to_vfn = htonl(V_FW_CMD_OP(FW_EQ_OFLD_CMD) | F_FW_CMD_REQUEST | 2291 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_EQ_OFLD_CMD_PFN(sc->pf) | 2292 V_FW_EQ_OFLD_CMD_VFN(0)); 2293 c.alloc_to_len16 = htonl(F_FW_EQ_OFLD_CMD_ALLOC | 2294 F_FW_EQ_OFLD_CMD_EQSTART | FW_LEN16(c)); 2295 c.fetchszm_to_iqid = 2296 htonl(V_FW_EQ_OFLD_CMD_HOSTFCMODE(X_HOSTFCMODE_STATUS_PAGE) | 2297 V_FW_EQ_OFLD_CMD_PCIECHN(eq->tx_chan) | 2298 F_FW_EQ_OFLD_CMD_FETCHRO | V_FW_EQ_OFLD_CMD_IQID(eq->iqid)); 2299 c.dcaen_to_eqsize = 2300 htobe32(V_FW_EQ_OFLD_CMD_FBMIN(X_FETCHBURSTMIN_64B) | 2301 V_FW_EQ_OFLD_CMD_FBMAX(X_FETCHBURSTMAX_512B) | 2302 V_FW_EQ_OFLD_CMD_CIDXFTHRESH(X_CIDXFLUSHTHRESH_32) | 2303 V_FW_EQ_OFLD_CMD_EQSIZE(eq->qsize)); 2304 c.eqaddr = htobe64(eq->ba); 2305 2306 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c); 2307 if (rc != 0) { 2308 device_printf(pi->dev, 2309 "failed to create egress queue for TCP offload: %d\n", rc); 2310 return (rc); 2311 } 2312 eq->flags |= EQ_ALLOCATED; 2313 2314 eq->cntxt_id = G_FW_EQ_OFLD_CMD_EQID(be32toh(c.eqid_pkd)); 2315 cntxt_id = eq->cntxt_id - sc->sge.eq_start; 2316 if (cntxt_id >= sc->sge.neq) 2317 panic("%s: eq->cntxt_id (%d) more than the max (%d)", __func__, 2318 cntxt_id, sc->sge.neq - 1); 2319 sc->sge.eqmap[cntxt_id] = eq; 2320 2321 return (rc); 2322 } 2323 #endif 2324 2325 static int 2326 alloc_eq(struct adapter *sc, struct port_info *pi, struct sge_eq *eq) 2327 { 2328 int rc; 2329 size_t len; 2330 2331 mtx_init(&eq->eq_lock, eq->lockname, NULL, MTX_DEF); 2332 2333 len = eq->qsize * EQ_ESIZE; 2334 rc = alloc_ring(sc, len, &eq->desc_tag, &eq->desc_map, 2335 &eq->ba, (void **)&eq->desc); 2336 if (rc) 2337 return (rc); 2338 2339 eq->cap = eq->qsize - spg_len / EQ_ESIZE; 2340 eq->spg = (void *)&eq->desc[eq->cap]; 2341 eq->avail = eq->cap - 1; /* one less to avoid cidx = pidx */ 2342 eq->pidx = eq->cidx = 0; 2343 eq->doorbells = sc->doorbells; 2344 2345 switch (eq->flags & EQ_TYPEMASK) { 2346 case EQ_CTRL: 2347 rc = ctrl_eq_alloc(sc, eq); 2348 break; 2349 2350 case EQ_ETH: 2351 rc = eth_eq_alloc(sc, pi, eq); 2352 break; 2353 2354 #ifdef TCP_OFFLOAD 2355 case EQ_OFLD: 2356 rc = ofld_eq_alloc(sc, pi, eq); 2357 break; 2358 #endif 2359 2360 default: 2361 panic("%s: invalid eq type %d.", __func__, 2362 eq->flags & EQ_TYPEMASK); 2363 } 2364 if (rc != 0) { 2365 device_printf(sc->dev, 2366 "failed to allocate egress queue(%d): %d", 2367 eq->flags & EQ_TYPEMASK, rc); 2368 } 2369 2370 eq->tx_callout.c_cpu = eq->cntxt_id % mp_ncpus; 2371 2372 if (isset(&eq->doorbells, DOORBELL_UDB) || 2373 isset(&eq->doorbells, DOORBELL_UDBWC) || 2374 isset(&eq->doorbells, DOORBELL_WCWR)) { 2375 uint32_t s_qpp = sc->sge.s_qpp; 2376 uint32_t mask = (1 << s_qpp) - 1; 2377 volatile uint8_t *udb; 2378 2379 udb = sc->udbs_base + UDBS_DB_OFFSET; 2380 udb += (eq->cntxt_id >> s_qpp) << PAGE_SHIFT; /* pg offset */ 2381 eq->udb_qid = eq->cntxt_id & mask; /* id in page */ 2382 if (eq->udb_qid > PAGE_SIZE / UDBS_SEG_SIZE) 2383 clrbit(&eq->doorbells, DOORBELL_WCWR); 2384 else { 2385 udb += eq->udb_qid << UDBS_SEG_SHIFT; /* seg offset */ 2386 eq->udb_qid = 0; 2387 } 2388 eq->udb = (volatile void *)udb; 2389 } 2390 2391 return (rc); 2392 } 2393 2394 static int 2395 free_eq(struct adapter *sc, struct sge_eq *eq) 2396 { 2397 int rc; 2398 2399 if (eq->flags & EQ_ALLOCATED) { 2400 switch (eq->flags & EQ_TYPEMASK) { 2401 case EQ_CTRL: 2402 rc = -t4_ctrl_eq_free(sc, sc->mbox, sc->pf, 0, 2403 eq->cntxt_id); 2404 break; 2405 2406 case EQ_ETH: 2407 rc = -t4_eth_eq_free(sc, sc->mbox, sc->pf, 0, 2408 eq->cntxt_id); 2409 break; 2410 2411 #ifdef TCP_OFFLOAD 2412 case EQ_OFLD: 2413 rc = -t4_ofld_eq_free(sc, sc->mbox, sc->pf, 0, 2414 eq->cntxt_id); 2415 break; 2416 #endif 2417 2418 default: 2419 panic("%s: invalid eq type %d.", __func__, 2420 eq->flags & EQ_TYPEMASK); 2421 } 2422 if (rc != 0) { 2423 device_printf(sc->dev, 2424 "failed to free egress queue (%d): %d\n", 2425 eq->flags & EQ_TYPEMASK, rc); 2426 return (rc); 2427 } 2428 eq->flags &= ~EQ_ALLOCATED; 2429 } 2430 2431 free_ring(sc, eq->desc_tag, eq->desc_map, eq->ba, eq->desc); 2432 2433 if (mtx_initialized(&eq->eq_lock)) 2434 mtx_destroy(&eq->eq_lock); 2435 2436 bzero(eq, sizeof(*eq)); 2437 return (0); 2438 } 2439 2440 static int 2441 alloc_wrq(struct adapter *sc, struct port_info *pi, struct sge_wrq *wrq, 2442 struct sysctl_oid *oid) 2443 { 2444 int rc; 2445 struct sysctl_ctx_list *ctx = pi ? &pi->ctx : &sc->ctx; 2446 struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid); 2447 2448 rc = alloc_eq(sc, pi, &wrq->eq); 2449 if (rc) 2450 return (rc); 2451 2452 wrq->adapter = sc; 2453 STAILQ_INIT(&wrq->wr_list); 2454 2455 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "cntxt_id", CTLFLAG_RD, 2456 &wrq->eq.cntxt_id, 0, "SGE context id of the queue"); 2457 SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cidx", 2458 CTLTYPE_INT | CTLFLAG_RD, &wrq->eq.cidx, 0, sysctl_uint16, "I", 2459 "consumer index"); 2460 SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "pidx", 2461 CTLTYPE_INT | CTLFLAG_RD, &wrq->eq.pidx, 0, sysctl_uint16, "I", 2462 "producer index"); 2463 SYSCTL_ADD_UQUAD(ctx, children, OID_AUTO, "tx_wrs", CTLFLAG_RD, 2464 &wrq->tx_wrs, "# of work requests"); 2465 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "no_desc", CTLFLAG_RD, 2466 &wrq->no_desc, 0, 2467 "# of times queue ran out of hardware descriptors"); 2468 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "unstalled", CTLFLAG_RD, 2469 &wrq->eq.unstalled, 0, "# of times queue recovered after stall"); 2470 2471 2472 return (rc); 2473 } 2474 2475 static int 2476 free_wrq(struct adapter *sc, struct sge_wrq *wrq) 2477 { 2478 int rc; 2479 2480 rc = free_eq(sc, &wrq->eq); 2481 if (rc) 2482 return (rc); 2483 2484 bzero(wrq, sizeof(*wrq)); 2485 return (0); 2486 } 2487 2488 static int 2489 alloc_txq(struct port_info *pi, struct sge_txq *txq, int idx, 2490 struct sysctl_oid *oid) 2491 { 2492 int rc; 2493 struct adapter *sc = pi->adapter; 2494 struct sge_eq *eq = &txq->eq; 2495 char name[16]; 2496 struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid); 2497 2498 rc = alloc_eq(sc, pi, eq); 2499 if (rc) 2500 return (rc); 2501 2502 txq->ifp = pi->ifp; 2503 2504 txq->sdesc = malloc(eq->cap * sizeof(struct tx_sdesc), M_CXGBE, 2505 M_ZERO | M_WAITOK); 2506 txq->br = buf_ring_alloc(eq->qsize, M_CXGBE, M_WAITOK, &eq->eq_lock); 2507 2508 rc = bus_dma_tag_create(sc->dmat, 1, 0, BUS_SPACE_MAXADDR, 2509 BUS_SPACE_MAXADDR, NULL, NULL, 64 * 1024, TX_SGL_SEGS, 2510 BUS_SPACE_MAXSIZE, BUS_DMA_ALLOCNOW, NULL, NULL, &txq->tx_tag); 2511 if (rc != 0) { 2512 device_printf(sc->dev, 2513 "failed to create tx DMA tag: %d\n", rc); 2514 return (rc); 2515 } 2516 2517 /* 2518 * We can stuff ~10 frames in an 8-descriptor txpkts WR (8 is the SGE 2519 * limit for any WR). txq->no_dmamap events shouldn't occur if maps is 2520 * sized for the worst case. 2521 */ 2522 rc = t4_alloc_tx_maps(&txq->txmaps, txq->tx_tag, eq->qsize * 10 / 8, 2523 M_WAITOK); 2524 if (rc != 0) { 2525 device_printf(sc->dev, "failed to setup tx DMA maps: %d\n", rc); 2526 return (rc); 2527 } 2528 2529 snprintf(name, sizeof(name), "%d", idx); 2530 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, name, CTLFLAG_RD, 2531 NULL, "tx queue"); 2532 children = SYSCTL_CHILDREN(oid); 2533 2534 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "cntxt_id", CTLFLAG_RD, 2535 &eq->cntxt_id, 0, "SGE context id of the queue"); 2536 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cidx", 2537 CTLTYPE_INT | CTLFLAG_RD, &eq->cidx, 0, sysctl_uint16, "I", 2538 "consumer index"); 2539 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "pidx", 2540 CTLTYPE_INT | CTLFLAG_RD, &eq->pidx, 0, sysctl_uint16, "I", 2541 "producer index"); 2542 2543 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "txcsum", CTLFLAG_RD, 2544 &txq->txcsum, "# of times hardware assisted with checksum"); 2545 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "vlan_insertion", 2546 CTLFLAG_RD, &txq->vlan_insertion, 2547 "# of times hardware inserted 802.1Q tag"); 2548 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "tso_wrs", CTLFLAG_RD, 2549 &txq->tso_wrs, "# of TSO work requests"); 2550 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "imm_wrs", CTLFLAG_RD, 2551 &txq->imm_wrs, "# of work requests with immediate data"); 2552 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "sgl_wrs", CTLFLAG_RD, 2553 &txq->sgl_wrs, "# of work requests with direct SGL"); 2554 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "txpkt_wrs", CTLFLAG_RD, 2555 &txq->txpkt_wrs, "# of txpkt work requests (one pkt/WR)"); 2556 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "txpkts_wrs", CTLFLAG_RD, 2557 &txq->txpkts_wrs, "# of txpkts work requests (multiple pkts/WR)"); 2558 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "txpkts_pkts", CTLFLAG_RD, 2559 &txq->txpkts_pkts, "# of frames tx'd using txpkts work requests"); 2560 2561 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "br_drops", CTLFLAG_RD, 2562 &txq->br->br_drops, "# of drops in the buf_ring for this queue"); 2563 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "no_dmamap", CTLFLAG_RD, 2564 &txq->no_dmamap, 0, "# of times txq ran out of DMA maps"); 2565 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "no_desc", CTLFLAG_RD, 2566 &txq->no_desc, 0, "# of times txq ran out of hardware descriptors"); 2567 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "egr_update", CTLFLAG_RD, 2568 &eq->egr_update, 0, "egress update notifications from the SGE"); 2569 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "unstalled", CTLFLAG_RD, 2570 &eq->unstalled, 0, "# of times txq recovered after stall"); 2571 2572 return (rc); 2573 } 2574 2575 static int 2576 free_txq(struct port_info *pi, struct sge_txq *txq) 2577 { 2578 int rc; 2579 struct adapter *sc = pi->adapter; 2580 struct sge_eq *eq = &txq->eq; 2581 2582 rc = free_eq(sc, eq); 2583 if (rc) 2584 return (rc); 2585 2586 free(txq->sdesc, M_CXGBE); 2587 2588 if (txq->txmaps.maps) 2589 t4_free_tx_maps(&txq->txmaps, txq->tx_tag); 2590 2591 buf_ring_free(txq->br, M_CXGBE); 2592 2593 if (txq->tx_tag) 2594 bus_dma_tag_destroy(txq->tx_tag); 2595 2596 bzero(txq, sizeof(*txq)); 2597 return (0); 2598 } 2599 2600 static void 2601 oneseg_dma_callback(void *arg, bus_dma_segment_t *segs, int nseg, int error) 2602 { 2603 bus_addr_t *ba = arg; 2604 2605 KASSERT(nseg == 1, 2606 ("%s meant for single segment mappings only.", __func__)); 2607 2608 *ba = error ? 0 : segs->ds_addr; 2609 } 2610 2611 static inline bool 2612 is_new_response(const struct sge_iq *iq, struct rsp_ctrl **ctrl) 2613 { 2614 *ctrl = (void *)((uintptr_t)iq->cdesc + 2615 (iq->esize - sizeof(struct rsp_ctrl))); 2616 2617 return (((*ctrl)->u.type_gen >> S_RSPD_GEN) == iq->gen); 2618 } 2619 2620 static inline void 2621 iq_next(struct sge_iq *iq) 2622 { 2623 iq->cdesc = (void *) ((uintptr_t)iq->cdesc + iq->esize); 2624 if (__predict_false(++iq->cidx == iq->qsize - 1)) { 2625 iq->cidx = 0; 2626 iq->gen ^= 1; 2627 iq->cdesc = iq->desc; 2628 } 2629 } 2630 2631 #define FL_HW_IDX(x) ((x) >> 3) 2632 static inline void 2633 ring_fl_db(struct adapter *sc, struct sge_fl *fl) 2634 { 2635 int ndesc = fl->pending / 8; 2636 uint32_t v; 2637 2638 if (FL_HW_IDX(fl->pidx) == FL_HW_IDX(fl->cidx)) 2639 ndesc--; /* hold back one credit */ 2640 2641 if (ndesc <= 0) 2642 return; /* nothing to do */ 2643 2644 v = F_DBPRIO | V_QID(fl->cntxt_id) | V_PIDX(ndesc); 2645 if (is_t5(sc)) 2646 v |= F_DBTYPE; 2647 2648 wmb(); 2649 2650 t4_write_reg(sc, MYPF_REG(A_SGE_PF_KDOORBELL), v); 2651 fl->pending -= ndesc * 8; 2652 } 2653 2654 /* 2655 * Fill up the freelist by upto nbufs and maybe ring its doorbell. 2656 * 2657 * Returns non-zero to indicate that it should be added to the list of starving 2658 * freelists. 2659 */ 2660 static int 2661 refill_fl(struct adapter *sc, struct sge_fl *fl, int nbufs) 2662 { 2663 __be64 *d = &fl->desc[fl->pidx]; 2664 struct fl_sdesc *sd = &fl->sdesc[fl->pidx]; 2665 bus_dma_tag_t tag; 2666 bus_addr_t pa; 2667 caddr_t cl; 2668 int rc; 2669 2670 FL_LOCK_ASSERT_OWNED(fl); 2671 2672 if (nbufs > fl->needed) 2673 nbufs = fl->needed; 2674 2675 while (nbufs--) { 2676 2677 if (sd->cl != NULL) { 2678 2679 /* 2680 * This happens when a frame small enough to fit 2681 * entirely in an mbuf was received in cl last time. 2682 * We'd held on to cl and can reuse it now. Note that 2683 * we reuse a cluster of the old size if fl->tag_idx is 2684 * no longer the same as sd->tag_idx. 2685 */ 2686 2687 KASSERT(*d == sd->ba_tag, 2688 ("%s: recyling problem at pidx %d", 2689 __func__, fl->pidx)); 2690 2691 d++; 2692 goto recycled; 2693 } 2694 2695 2696 if (fl->tag_idx != sd->tag_idx) { 2697 bus_dmamap_t map; 2698 bus_dma_tag_t newtag = fl->tag[fl->tag_idx]; 2699 bus_dma_tag_t oldtag = fl->tag[sd->tag_idx]; 2700 2701 /* 2702 * An MTU change can get us here. Discard the old map 2703 * which was created with the old tag, but only if 2704 * we're able to get a new one. 2705 */ 2706 rc = bus_dmamap_create(newtag, 0, &map); 2707 if (rc == 0) { 2708 bus_dmamap_destroy(oldtag, sd->map); 2709 sd->map = map; 2710 sd->tag_idx = fl->tag_idx; 2711 } 2712 } 2713 2714 tag = fl->tag[sd->tag_idx]; 2715 2716 cl = m_cljget(NULL, M_NOWAIT, FL_BUF_SIZE(sd->tag_idx)); 2717 if (cl == NULL) 2718 break; 2719 2720 rc = bus_dmamap_load(tag, sd->map, cl, FL_BUF_SIZE(sd->tag_idx), 2721 oneseg_dma_callback, &pa, 0); 2722 if (rc != 0 || pa == 0) { 2723 fl->dmamap_failed++; 2724 uma_zfree(FL_BUF_ZONE(sd->tag_idx), cl); 2725 break; 2726 } 2727 2728 sd->cl = cl; 2729 *d++ = htobe64(pa | sd->tag_idx); 2730 2731 #ifdef INVARIANTS 2732 sd->ba_tag = htobe64(pa | sd->tag_idx); 2733 #endif 2734 2735 recycled: 2736 /* sd->m is never recycled, should always be NULL */ 2737 KASSERT(sd->m == NULL, ("%s: stray mbuf", __func__)); 2738 2739 sd->m = m_gethdr(M_NOWAIT, MT_NOINIT); 2740 if (sd->m == NULL) 2741 break; 2742 2743 fl->pending++; 2744 fl->needed--; 2745 sd++; 2746 if (++fl->pidx == fl->cap) { 2747 fl->pidx = 0; 2748 sd = fl->sdesc; 2749 d = fl->desc; 2750 } 2751 } 2752 2753 if (fl->pending >= 8) 2754 ring_fl_db(sc, fl); 2755 2756 return (FL_RUNNING_LOW(fl) && !(fl->flags & FL_STARVING)); 2757 } 2758 2759 /* 2760 * Attempt to refill all starving freelists. 2761 */ 2762 static void 2763 refill_sfl(void *arg) 2764 { 2765 struct adapter *sc = arg; 2766 struct sge_fl *fl, *fl_temp; 2767 2768 mtx_lock(&sc->sfl_lock); 2769 TAILQ_FOREACH_SAFE(fl, &sc->sfl, link, fl_temp) { 2770 FL_LOCK(fl); 2771 refill_fl(sc, fl, 64); 2772 if (FL_NOT_RUNNING_LOW(fl) || fl->flags & FL_DOOMED) { 2773 TAILQ_REMOVE(&sc->sfl, fl, link); 2774 fl->flags &= ~FL_STARVING; 2775 } 2776 FL_UNLOCK(fl); 2777 } 2778 2779 if (!TAILQ_EMPTY(&sc->sfl)) 2780 callout_schedule(&sc->sfl_callout, hz / 5); 2781 mtx_unlock(&sc->sfl_lock); 2782 } 2783 2784 static int 2785 alloc_fl_sdesc(struct sge_fl *fl) 2786 { 2787 struct fl_sdesc *sd; 2788 bus_dma_tag_t tag; 2789 int i, rc; 2790 2791 FL_LOCK_ASSERT_OWNED(fl); 2792 2793 fl->sdesc = malloc(fl->cap * sizeof(struct fl_sdesc), M_CXGBE, 2794 M_ZERO | M_WAITOK); 2795 2796 tag = fl->tag[fl->tag_idx]; 2797 sd = fl->sdesc; 2798 for (i = 0; i < fl->cap; i++, sd++) { 2799 2800 sd->tag_idx = fl->tag_idx; 2801 rc = bus_dmamap_create(tag, 0, &sd->map); 2802 if (rc != 0) 2803 goto failed; 2804 } 2805 2806 return (0); 2807 failed: 2808 while (--i >= 0) { 2809 sd--; 2810 bus_dmamap_destroy(tag, sd->map); 2811 if (sd->m) { 2812 m_init(sd->m, NULL, 0, M_NOWAIT, MT_DATA, 0); 2813 m_free(sd->m); 2814 sd->m = NULL; 2815 } 2816 } 2817 KASSERT(sd == fl->sdesc, ("%s: EDOOFUS", __func__)); 2818 2819 free(fl->sdesc, M_CXGBE); 2820 fl->sdesc = NULL; 2821 2822 return (rc); 2823 } 2824 2825 static void 2826 free_fl_sdesc(struct sge_fl *fl) 2827 { 2828 struct fl_sdesc *sd; 2829 int i; 2830 2831 FL_LOCK_ASSERT_OWNED(fl); 2832 2833 sd = fl->sdesc; 2834 for (i = 0; i < fl->cap; i++, sd++) { 2835 2836 if (sd->m) { 2837 m_init(sd->m, NULL, 0, M_NOWAIT, MT_DATA, 0); 2838 m_free(sd->m); 2839 sd->m = NULL; 2840 } 2841 2842 if (sd->cl) { 2843 bus_dmamap_unload(fl->tag[sd->tag_idx], sd->map); 2844 uma_zfree(FL_BUF_ZONE(sd->tag_idx), sd->cl); 2845 sd->cl = NULL; 2846 } 2847 2848 bus_dmamap_destroy(fl->tag[sd->tag_idx], sd->map); 2849 } 2850 2851 free(fl->sdesc, M_CXGBE); 2852 fl->sdesc = NULL; 2853 } 2854 2855 int 2856 t4_alloc_tx_maps(struct tx_maps *txmaps, bus_dma_tag_t tx_tag, int count, 2857 int flags) 2858 { 2859 struct tx_map *txm; 2860 int i, rc; 2861 2862 txmaps->map_total = txmaps->map_avail = count; 2863 txmaps->map_cidx = txmaps->map_pidx = 0; 2864 2865 txmaps->maps = malloc(count * sizeof(struct tx_map), M_CXGBE, 2866 M_ZERO | flags); 2867 2868 txm = txmaps->maps; 2869 for (i = 0; i < count; i++, txm++) { 2870 rc = bus_dmamap_create(tx_tag, 0, &txm->map); 2871 if (rc != 0) 2872 goto failed; 2873 } 2874 2875 return (0); 2876 failed: 2877 while (--i >= 0) { 2878 txm--; 2879 bus_dmamap_destroy(tx_tag, txm->map); 2880 } 2881 KASSERT(txm == txmaps->maps, ("%s: EDOOFUS", __func__)); 2882 2883 free(txmaps->maps, M_CXGBE); 2884 txmaps->maps = NULL; 2885 2886 return (rc); 2887 } 2888 2889 void 2890 t4_free_tx_maps(struct tx_maps *txmaps, bus_dma_tag_t tx_tag) 2891 { 2892 struct tx_map *txm; 2893 int i; 2894 2895 txm = txmaps->maps; 2896 for (i = 0; i < txmaps->map_total; i++, txm++) { 2897 2898 if (txm->m) { 2899 bus_dmamap_unload(tx_tag, txm->map); 2900 m_freem(txm->m); 2901 txm->m = NULL; 2902 } 2903 2904 bus_dmamap_destroy(tx_tag, txm->map); 2905 } 2906 2907 free(txmaps->maps, M_CXGBE); 2908 txmaps->maps = NULL; 2909 } 2910 2911 /* 2912 * We'll do immediate data tx for non-TSO, but only when not coalescing. We're 2913 * willing to use upto 2 hardware descriptors which means a maximum of 96 bytes 2914 * of immediate data. 2915 */ 2916 #define IMM_LEN ( \ 2917 2 * EQ_ESIZE \ 2918 - sizeof(struct fw_eth_tx_pkt_wr) \ 2919 - sizeof(struct cpl_tx_pkt_core)) 2920 2921 /* 2922 * Returns non-zero on failure, no need to cleanup anything in that case. 2923 * 2924 * Note 1: We always try to defrag the mbuf if required and return EFBIG only 2925 * if the resulting chain still won't fit in a tx descriptor. 2926 * 2927 * Note 2: We'll pullup the mbuf chain if TSO is requested and the first mbuf 2928 * does not have the TCP header in it. 2929 */ 2930 static int 2931 get_pkt_sgl(struct sge_txq *txq, struct mbuf **fp, struct sgl *sgl, 2932 int sgl_only) 2933 { 2934 struct mbuf *m = *fp; 2935 struct tx_maps *txmaps; 2936 struct tx_map *txm; 2937 int rc, defragged = 0, n; 2938 2939 TXQ_LOCK_ASSERT_OWNED(txq); 2940 2941 if (m->m_pkthdr.tso_segsz) 2942 sgl_only = 1; /* Do not allow immediate data with LSO */ 2943 2944 start: sgl->nsegs = 0; 2945 2946 if (m->m_pkthdr.len <= IMM_LEN && !sgl_only) 2947 return (0); /* nsegs = 0 tells caller to use imm. tx */ 2948 2949 txmaps = &txq->txmaps; 2950 if (txmaps->map_avail == 0) { 2951 txq->no_dmamap++; 2952 return (ENOMEM); 2953 } 2954 txm = &txmaps->maps[txmaps->map_pidx]; 2955 2956 if (m->m_pkthdr.tso_segsz && m->m_len < 50) { 2957 *fp = m_pullup(m, 50); 2958 m = *fp; 2959 if (m == NULL) 2960 return (ENOBUFS); 2961 } 2962 2963 rc = bus_dmamap_load_mbuf_sg(txq->tx_tag, txm->map, m, sgl->seg, 2964 &sgl->nsegs, BUS_DMA_NOWAIT); 2965 if (rc == EFBIG && defragged == 0) { 2966 m = m_defrag(m, M_NOWAIT); 2967 if (m == NULL) 2968 return (EFBIG); 2969 2970 defragged = 1; 2971 *fp = m; 2972 goto start; 2973 } 2974 if (rc != 0) 2975 return (rc); 2976 2977 txm->m = m; 2978 txmaps->map_avail--; 2979 if (++txmaps->map_pidx == txmaps->map_total) 2980 txmaps->map_pidx = 0; 2981 2982 KASSERT(sgl->nsegs > 0 && sgl->nsegs <= TX_SGL_SEGS, 2983 ("%s: bad DMA mapping (%d segments)", __func__, sgl->nsegs)); 2984 2985 /* 2986 * Store the # of flits required to hold this frame's SGL in nflits. An 2987 * SGL has a (ULPTX header + len0, addr0) tuple optionally followed by 2988 * multiple (len0 + len1, addr0, addr1) tuples. If addr1 is not used 2989 * then len1 must be set to 0. 2990 */ 2991 n = sgl->nsegs - 1; 2992 sgl->nflits = (3 * n) / 2 + (n & 1) + 2; 2993 2994 return (0); 2995 } 2996 2997 2998 /* 2999 * Releases all the txq resources used up in the specified sgl. 3000 */ 3001 static int 3002 free_pkt_sgl(struct sge_txq *txq, struct sgl *sgl) 3003 { 3004 struct tx_maps *txmaps; 3005 struct tx_map *txm; 3006 3007 TXQ_LOCK_ASSERT_OWNED(txq); 3008 3009 if (sgl->nsegs == 0) 3010 return (0); /* didn't use any map */ 3011 3012 txmaps = &txq->txmaps; 3013 3014 /* 1 pkt uses exactly 1 map, back it out */ 3015 3016 txmaps->map_avail++; 3017 if (txmaps->map_pidx > 0) 3018 txmaps->map_pidx--; 3019 else 3020 txmaps->map_pidx = txmaps->map_total - 1; 3021 3022 txm = &txmaps->maps[txmaps->map_pidx]; 3023 bus_dmamap_unload(txq->tx_tag, txm->map); 3024 txm->m = NULL; 3025 3026 return (0); 3027 } 3028 3029 static int 3030 write_txpkt_wr(struct port_info *pi, struct sge_txq *txq, struct mbuf *m, 3031 struct sgl *sgl) 3032 { 3033 struct sge_eq *eq = &txq->eq; 3034 struct fw_eth_tx_pkt_wr *wr; 3035 struct cpl_tx_pkt_core *cpl; 3036 uint32_t ctrl; /* used in many unrelated places */ 3037 uint64_t ctrl1; 3038 int nflits, ndesc, pktlen; 3039 struct tx_sdesc *txsd; 3040 caddr_t dst; 3041 3042 TXQ_LOCK_ASSERT_OWNED(txq); 3043 3044 pktlen = m->m_pkthdr.len; 3045 3046 /* 3047 * Do we have enough flits to send this frame out? 3048 */ 3049 ctrl = sizeof(struct cpl_tx_pkt_core); 3050 if (m->m_pkthdr.tso_segsz) { 3051 nflits = TXPKT_LSO_WR_HDR; 3052 ctrl += sizeof(struct cpl_tx_pkt_lso_core); 3053 } else 3054 nflits = TXPKT_WR_HDR; 3055 if (sgl->nsegs > 0) 3056 nflits += sgl->nflits; 3057 else { 3058 nflits += howmany(pktlen, 8); 3059 ctrl += pktlen; 3060 } 3061 ndesc = howmany(nflits, 8); 3062 if (ndesc > eq->avail) 3063 return (ENOMEM); 3064 3065 /* Firmware work request header */ 3066 wr = (void *)&eq->desc[eq->pidx]; 3067 wr->op_immdlen = htobe32(V_FW_WR_OP(FW_ETH_TX_PKT_WR) | 3068 V_FW_ETH_TX_PKT_WR_IMMDLEN(ctrl)); 3069 ctrl = V_FW_WR_LEN16(howmany(nflits, 2)); 3070 if (eq->avail == ndesc) { 3071 if (!(eq->flags & EQ_CRFLUSHED)) { 3072 ctrl |= F_FW_WR_EQUEQ | F_FW_WR_EQUIQ; 3073 eq->flags |= EQ_CRFLUSHED; 3074 } 3075 eq->flags |= EQ_STALLED; 3076 } 3077 3078 wr->equiq_to_len16 = htobe32(ctrl); 3079 wr->r3 = 0; 3080 3081 if (m->m_pkthdr.tso_segsz) { 3082 struct cpl_tx_pkt_lso_core *lso = (void *)(wr + 1); 3083 struct ether_header *eh; 3084 void *l3hdr; 3085 #if defined(INET) || defined(INET6) 3086 struct tcphdr *tcp; 3087 #endif 3088 uint16_t eh_type; 3089 3090 ctrl = V_LSO_OPCODE(CPL_TX_PKT_LSO) | F_LSO_FIRST_SLICE | 3091 F_LSO_LAST_SLICE; 3092 3093 eh = mtod(m, struct ether_header *); 3094 eh_type = ntohs(eh->ether_type); 3095 if (eh_type == ETHERTYPE_VLAN) { 3096 struct ether_vlan_header *evh = (void *)eh; 3097 3098 ctrl |= V_LSO_ETHHDR_LEN(1); 3099 l3hdr = evh + 1; 3100 eh_type = ntohs(evh->evl_proto); 3101 } else 3102 l3hdr = eh + 1; 3103 3104 switch (eh_type) { 3105 #ifdef INET6 3106 case ETHERTYPE_IPV6: 3107 { 3108 struct ip6_hdr *ip6 = l3hdr; 3109 3110 /* 3111 * XXX-BZ For now we do not pretend to support 3112 * IPv6 extension headers. 3113 */ 3114 KASSERT(ip6->ip6_nxt == IPPROTO_TCP, ("%s: CSUM_TSO " 3115 "with ip6_nxt != TCP: %u", __func__, ip6->ip6_nxt)); 3116 tcp = (struct tcphdr *)(ip6 + 1); 3117 ctrl |= F_LSO_IPV6; 3118 ctrl |= V_LSO_IPHDR_LEN(sizeof(*ip6) >> 2) | 3119 V_LSO_TCPHDR_LEN(tcp->th_off); 3120 break; 3121 } 3122 #endif 3123 #ifdef INET 3124 case ETHERTYPE_IP: 3125 { 3126 struct ip *ip = l3hdr; 3127 3128 tcp = (void *)((uintptr_t)ip + ip->ip_hl * 4); 3129 ctrl |= V_LSO_IPHDR_LEN(ip->ip_hl) | 3130 V_LSO_TCPHDR_LEN(tcp->th_off); 3131 break; 3132 } 3133 #endif 3134 default: 3135 panic("%s: CSUM_TSO but no supported IP version " 3136 "(0x%04x)", __func__, eh_type); 3137 } 3138 3139 lso->lso_ctrl = htobe32(ctrl); 3140 lso->ipid_ofst = htobe16(0); 3141 lso->mss = htobe16(m->m_pkthdr.tso_segsz); 3142 lso->seqno_offset = htobe32(0); 3143 lso->len = htobe32(pktlen); 3144 3145 cpl = (void *)(lso + 1); 3146 3147 txq->tso_wrs++; 3148 } else 3149 cpl = (void *)(wr + 1); 3150 3151 /* Checksum offload */ 3152 ctrl1 = 0; 3153 if (!(m->m_pkthdr.csum_flags & (CSUM_IP | CSUM_TSO))) 3154 ctrl1 |= F_TXPKT_IPCSUM_DIS; 3155 if (!(m->m_pkthdr.csum_flags & (CSUM_TCP | CSUM_UDP | CSUM_UDP_IPV6 | 3156 CSUM_TCP_IPV6 | CSUM_TSO))) 3157 ctrl1 |= F_TXPKT_L4CSUM_DIS; 3158 if (m->m_pkthdr.csum_flags & (CSUM_IP | CSUM_TCP | CSUM_UDP | 3159 CSUM_UDP_IPV6 | CSUM_TCP_IPV6 | CSUM_TSO)) 3160 txq->txcsum++; /* some hardware assistance provided */ 3161 3162 /* VLAN tag insertion */ 3163 if (m->m_flags & M_VLANTAG) { 3164 ctrl1 |= F_TXPKT_VLAN_VLD | V_TXPKT_VLAN(m->m_pkthdr.ether_vtag); 3165 txq->vlan_insertion++; 3166 } 3167 3168 /* CPL header */ 3169 cpl->ctrl0 = htobe32(V_TXPKT_OPCODE(CPL_TX_PKT) | 3170 V_TXPKT_INTF(pi->tx_chan) | V_TXPKT_PF(pi->adapter->pf)); 3171 cpl->pack = 0; 3172 cpl->len = htobe16(pktlen); 3173 cpl->ctrl1 = htobe64(ctrl1); 3174 3175 /* Software descriptor */ 3176 txsd = &txq->sdesc[eq->pidx]; 3177 txsd->desc_used = ndesc; 3178 3179 eq->pending += ndesc; 3180 eq->avail -= ndesc; 3181 eq->pidx += ndesc; 3182 if (eq->pidx >= eq->cap) 3183 eq->pidx -= eq->cap; 3184 3185 /* SGL */ 3186 dst = (void *)(cpl + 1); 3187 if (sgl->nsegs > 0) { 3188 txsd->credits = 1; 3189 txq->sgl_wrs++; 3190 write_sgl_to_txd(eq, sgl, &dst); 3191 } else { 3192 txsd->credits = 0; 3193 txq->imm_wrs++; 3194 for (; m; m = m->m_next) { 3195 copy_to_txd(eq, mtod(m, caddr_t), &dst, m->m_len); 3196 #ifdef INVARIANTS 3197 pktlen -= m->m_len; 3198 #endif 3199 } 3200 #ifdef INVARIANTS 3201 KASSERT(pktlen == 0, ("%s: %d bytes left.", __func__, pktlen)); 3202 #endif 3203 3204 } 3205 3206 txq->txpkt_wrs++; 3207 return (0); 3208 } 3209 3210 /* 3211 * Returns 0 to indicate that m has been accepted into a coalesced tx work 3212 * request. It has either been folded into txpkts or txpkts was flushed and m 3213 * has started a new coalesced work request (as the first frame in a fresh 3214 * txpkts). 3215 * 3216 * Returns non-zero to indicate a failure - caller is responsible for 3217 * transmitting m, if there was anything in txpkts it has been flushed. 3218 */ 3219 static int 3220 add_to_txpkts(struct port_info *pi, struct sge_txq *txq, struct txpkts *txpkts, 3221 struct mbuf *m, struct sgl *sgl) 3222 { 3223 struct sge_eq *eq = &txq->eq; 3224 int can_coalesce; 3225 struct tx_sdesc *txsd; 3226 int flits; 3227 3228 TXQ_LOCK_ASSERT_OWNED(txq); 3229 3230 KASSERT(sgl->nsegs, ("%s: can't coalesce imm data", __func__)); 3231 3232 if (txpkts->npkt > 0) { 3233 flits = TXPKTS_PKT_HDR + sgl->nflits; 3234 can_coalesce = m->m_pkthdr.tso_segsz == 0 && 3235 txpkts->nflits + flits <= TX_WR_FLITS && 3236 txpkts->nflits + flits <= eq->avail * 8 && 3237 txpkts->plen + m->m_pkthdr.len < 65536; 3238 3239 if (can_coalesce) { 3240 txpkts->npkt++; 3241 txpkts->nflits += flits; 3242 txpkts->plen += m->m_pkthdr.len; 3243 3244 txsd = &txq->sdesc[eq->pidx]; 3245 txsd->credits++; 3246 3247 return (0); 3248 } 3249 3250 /* 3251 * Couldn't coalesce m into txpkts. The first order of business 3252 * is to send txpkts on its way. Then we'll revisit m. 3253 */ 3254 write_txpkts_wr(txq, txpkts); 3255 } 3256 3257 /* 3258 * Check if we can start a new coalesced tx work request with m as 3259 * the first packet in it. 3260 */ 3261 3262 KASSERT(txpkts->npkt == 0, ("%s: txpkts not empty", __func__)); 3263 3264 flits = TXPKTS_WR_HDR + sgl->nflits; 3265 can_coalesce = m->m_pkthdr.tso_segsz == 0 && 3266 flits <= eq->avail * 8 && flits <= TX_WR_FLITS; 3267 3268 if (can_coalesce == 0) 3269 return (EINVAL); 3270 3271 /* 3272 * Start a fresh coalesced tx WR with m as the first frame in it. 3273 */ 3274 txpkts->npkt = 1; 3275 txpkts->nflits = flits; 3276 txpkts->flitp = &eq->desc[eq->pidx].flit[2]; 3277 txpkts->plen = m->m_pkthdr.len; 3278 3279 txsd = &txq->sdesc[eq->pidx]; 3280 txsd->credits = 1; 3281 3282 return (0); 3283 } 3284 3285 /* 3286 * Note that write_txpkts_wr can never run out of hardware descriptors (but 3287 * write_txpkt_wr can). add_to_txpkts ensures that a frame is accepted for 3288 * coalescing only if sufficient hardware descriptors are available. 3289 */ 3290 static void 3291 write_txpkts_wr(struct sge_txq *txq, struct txpkts *txpkts) 3292 { 3293 struct sge_eq *eq = &txq->eq; 3294 struct fw_eth_tx_pkts_wr *wr; 3295 struct tx_sdesc *txsd; 3296 uint32_t ctrl; 3297 int ndesc; 3298 3299 TXQ_LOCK_ASSERT_OWNED(txq); 3300 3301 ndesc = howmany(txpkts->nflits, 8); 3302 3303 wr = (void *)&eq->desc[eq->pidx]; 3304 wr->op_pkd = htobe32(V_FW_WR_OP(FW_ETH_TX_PKTS_WR)); 3305 ctrl = V_FW_WR_LEN16(howmany(txpkts->nflits, 2)); 3306 if (eq->avail == ndesc) { 3307 if (!(eq->flags & EQ_CRFLUSHED)) { 3308 ctrl |= F_FW_WR_EQUEQ | F_FW_WR_EQUIQ; 3309 eq->flags |= EQ_CRFLUSHED; 3310 } 3311 eq->flags |= EQ_STALLED; 3312 } 3313 wr->equiq_to_len16 = htobe32(ctrl); 3314 wr->plen = htobe16(txpkts->plen); 3315 wr->npkt = txpkts->npkt; 3316 wr->r3 = wr->type = 0; 3317 3318 /* Everything else already written */ 3319 3320 txsd = &txq->sdesc[eq->pidx]; 3321 txsd->desc_used = ndesc; 3322 3323 KASSERT(eq->avail >= ndesc, ("%s: out of descriptors", __func__)); 3324 3325 eq->pending += ndesc; 3326 eq->avail -= ndesc; 3327 eq->pidx += ndesc; 3328 if (eq->pidx >= eq->cap) 3329 eq->pidx -= eq->cap; 3330 3331 txq->txpkts_pkts += txpkts->npkt; 3332 txq->txpkts_wrs++; 3333 txpkts->npkt = 0; /* emptied */ 3334 } 3335 3336 static inline void 3337 write_ulp_cpl_sgl(struct port_info *pi, struct sge_txq *txq, 3338 struct txpkts *txpkts, struct mbuf *m, struct sgl *sgl) 3339 { 3340 struct ulp_txpkt *ulpmc; 3341 struct ulptx_idata *ulpsc; 3342 struct cpl_tx_pkt_core *cpl; 3343 struct sge_eq *eq = &txq->eq; 3344 uintptr_t flitp, start, end; 3345 uint64_t ctrl; 3346 caddr_t dst; 3347 3348 KASSERT(txpkts->npkt > 0, ("%s: txpkts is empty", __func__)); 3349 3350 start = (uintptr_t)eq->desc; 3351 end = (uintptr_t)eq->spg; 3352 3353 /* Checksum offload */ 3354 ctrl = 0; 3355 if (!(m->m_pkthdr.csum_flags & (CSUM_IP | CSUM_TSO))) 3356 ctrl |= F_TXPKT_IPCSUM_DIS; 3357 if (!(m->m_pkthdr.csum_flags & (CSUM_TCP | CSUM_UDP | CSUM_UDP_IPV6 | 3358 CSUM_TCP_IPV6 | CSUM_TSO))) 3359 ctrl |= F_TXPKT_L4CSUM_DIS; 3360 if (m->m_pkthdr.csum_flags & (CSUM_IP | CSUM_TCP | CSUM_UDP | 3361 CSUM_UDP_IPV6 | CSUM_TCP_IPV6 | CSUM_TSO)) 3362 txq->txcsum++; /* some hardware assistance provided */ 3363 3364 /* VLAN tag insertion */ 3365 if (m->m_flags & M_VLANTAG) { 3366 ctrl |= F_TXPKT_VLAN_VLD | V_TXPKT_VLAN(m->m_pkthdr.ether_vtag); 3367 txq->vlan_insertion++; 3368 } 3369 3370 /* 3371 * The previous packet's SGL must have ended at a 16 byte boundary (this 3372 * is required by the firmware/hardware). It follows that flitp cannot 3373 * wrap around between the ULPTX master command and ULPTX subcommand (8 3374 * bytes each), and that it can not wrap around in the middle of the 3375 * cpl_tx_pkt_core either. 3376 */ 3377 flitp = (uintptr_t)txpkts->flitp; 3378 KASSERT((flitp & 0xf) == 0, 3379 ("%s: last SGL did not end at 16 byte boundary: %p", 3380 __func__, txpkts->flitp)); 3381 3382 /* ULP master command */ 3383 ulpmc = (void *)flitp; 3384 ulpmc->cmd_dest = htonl(V_ULPTX_CMD(ULP_TX_PKT) | V_ULP_TXPKT_DEST(0) | 3385 V_ULP_TXPKT_FID(eq->iqid)); 3386 ulpmc->len = htonl(howmany(sizeof(*ulpmc) + sizeof(*ulpsc) + 3387 sizeof(*cpl) + 8 * sgl->nflits, 16)); 3388 3389 /* ULP subcommand */ 3390 ulpsc = (void *)(ulpmc + 1); 3391 ulpsc->cmd_more = htobe32(V_ULPTX_CMD((u32)ULP_TX_SC_IMM) | 3392 F_ULP_TX_SC_MORE); 3393 ulpsc->len = htobe32(sizeof(struct cpl_tx_pkt_core)); 3394 3395 flitp += sizeof(*ulpmc) + sizeof(*ulpsc); 3396 if (flitp == end) 3397 flitp = start; 3398 3399 /* CPL_TX_PKT */ 3400 cpl = (void *)flitp; 3401 cpl->ctrl0 = htobe32(V_TXPKT_OPCODE(CPL_TX_PKT) | 3402 V_TXPKT_INTF(pi->tx_chan) | V_TXPKT_PF(pi->adapter->pf)); 3403 cpl->pack = 0; 3404 cpl->len = htobe16(m->m_pkthdr.len); 3405 cpl->ctrl1 = htobe64(ctrl); 3406 3407 flitp += sizeof(*cpl); 3408 if (flitp == end) 3409 flitp = start; 3410 3411 /* SGL for this frame */ 3412 dst = (caddr_t)flitp; 3413 txpkts->nflits += write_sgl_to_txd(eq, sgl, &dst); 3414 txpkts->flitp = (void *)dst; 3415 3416 KASSERT(((uintptr_t)dst & 0xf) == 0, 3417 ("%s: SGL ends at %p (not a 16 byte boundary)", __func__, dst)); 3418 } 3419 3420 /* 3421 * If the SGL ends on an address that is not 16 byte aligned, this function will 3422 * add a 0 filled flit at the end. It returns 1 in that case. 3423 */ 3424 static int 3425 write_sgl_to_txd(struct sge_eq *eq, struct sgl *sgl, caddr_t *to) 3426 { 3427 __be64 *flitp, *end; 3428 struct ulptx_sgl *usgl; 3429 bus_dma_segment_t *seg; 3430 int i, padded; 3431 3432 KASSERT(sgl->nsegs > 0 && sgl->nflits > 0, 3433 ("%s: bad SGL - nsegs=%d, nflits=%d", 3434 __func__, sgl->nsegs, sgl->nflits)); 3435 3436 KASSERT(((uintptr_t)(*to) & 0xf) == 0, 3437 ("%s: SGL must start at a 16 byte boundary: %p", __func__, *to)); 3438 3439 flitp = (__be64 *)(*to); 3440 end = flitp + sgl->nflits; 3441 seg = &sgl->seg[0]; 3442 usgl = (void *)flitp; 3443 3444 /* 3445 * We start at a 16 byte boundary somewhere inside the tx descriptor 3446 * ring, so we're at least 16 bytes away from the status page. There is 3447 * no chance of a wrap around in the middle of usgl (which is 16 bytes). 3448 */ 3449 3450 usgl->cmd_nsge = htobe32(V_ULPTX_CMD(ULP_TX_SC_DSGL) | 3451 V_ULPTX_NSGE(sgl->nsegs)); 3452 usgl->len0 = htobe32(seg->ds_len); 3453 usgl->addr0 = htobe64(seg->ds_addr); 3454 seg++; 3455 3456 if ((uintptr_t)end <= (uintptr_t)eq->spg) { 3457 3458 /* Won't wrap around at all */ 3459 3460 for (i = 0; i < sgl->nsegs - 1; i++, seg++) { 3461 usgl->sge[i / 2].len[i & 1] = htobe32(seg->ds_len); 3462 usgl->sge[i / 2].addr[i & 1] = htobe64(seg->ds_addr); 3463 } 3464 if (i & 1) 3465 usgl->sge[i / 2].len[1] = htobe32(0); 3466 } else { 3467 3468 /* Will wrap somewhere in the rest of the SGL */ 3469 3470 /* 2 flits already written, write the rest flit by flit */ 3471 flitp = (void *)(usgl + 1); 3472 for (i = 0; i < sgl->nflits - 2; i++) { 3473 if ((uintptr_t)flitp == (uintptr_t)eq->spg) 3474 flitp = (void *)eq->desc; 3475 *flitp++ = get_flit(seg, sgl->nsegs - 1, i); 3476 } 3477 end = flitp; 3478 } 3479 3480 if ((uintptr_t)end & 0xf) { 3481 *(uint64_t *)end = 0; 3482 end++; 3483 padded = 1; 3484 } else 3485 padded = 0; 3486 3487 if ((uintptr_t)end == (uintptr_t)eq->spg) 3488 *to = (void *)eq->desc; 3489 else 3490 *to = (void *)end; 3491 3492 return (padded); 3493 } 3494 3495 static inline void 3496 copy_to_txd(struct sge_eq *eq, caddr_t from, caddr_t *to, int len) 3497 { 3498 if (__predict_true((uintptr_t)(*to) + len <= (uintptr_t)eq->spg)) { 3499 bcopy(from, *to, len); 3500 (*to) += len; 3501 } else { 3502 int portion = (uintptr_t)eq->spg - (uintptr_t)(*to); 3503 3504 bcopy(from, *to, portion); 3505 from += portion; 3506 portion = len - portion; /* remaining */ 3507 bcopy(from, (void *)eq->desc, portion); 3508 (*to) = (caddr_t)eq->desc + portion; 3509 } 3510 } 3511 3512 static inline void 3513 ring_eq_db(struct adapter *sc, struct sge_eq *eq) 3514 { 3515 u_int db, pending; 3516 3517 db = eq->doorbells; 3518 pending = eq->pending; 3519 if (pending > 1) 3520 clrbit(&db, DOORBELL_WCWR); 3521 eq->pending = 0; 3522 wmb(); 3523 3524 switch (ffs(db) - 1) { 3525 case DOORBELL_UDB: 3526 *eq->udb = htole32(V_QID(eq->udb_qid) | V_PIDX(pending)); 3527 return; 3528 3529 case DOORBELL_WCWR: { 3530 volatile uint64_t *dst, *src; 3531 int i; 3532 3533 /* 3534 * Queues whose 128B doorbell segment fits in the page do not 3535 * use relative qid (udb_qid is always 0). Only queues with 3536 * doorbell segments can do WCWR. 3537 */ 3538 KASSERT(eq->udb_qid == 0 && pending == 1, 3539 ("%s: inappropriate doorbell (0x%x, %d, %d) for eq %p", 3540 __func__, eq->doorbells, pending, eq->pidx, eq)); 3541 3542 dst = (volatile void *)((uintptr_t)eq->udb + UDBS_WR_OFFSET - 3543 UDBS_DB_OFFSET); 3544 i = eq->pidx ? eq->pidx - 1 : eq->cap - 1; 3545 src = (void *)&eq->desc[i]; 3546 while (src != (void *)&eq->desc[i + 1]) 3547 *dst++ = *src++; 3548 wmb(); 3549 return; 3550 } 3551 3552 case DOORBELL_UDBWC: 3553 *eq->udb = htole32(V_QID(eq->udb_qid) | V_PIDX(pending)); 3554 wmb(); 3555 return; 3556 3557 case DOORBELL_KDB: 3558 t4_write_reg(sc, MYPF_REG(A_SGE_PF_KDOORBELL), 3559 V_QID(eq->cntxt_id) | V_PIDX(pending)); 3560 return; 3561 } 3562 } 3563 3564 static inline int 3565 reclaimable(struct sge_eq *eq) 3566 { 3567 unsigned int cidx; 3568 3569 cidx = eq->spg->cidx; /* stable snapshot */ 3570 cidx = be16toh(cidx); 3571 3572 if (cidx >= eq->cidx) 3573 return (cidx - eq->cidx); 3574 else 3575 return (cidx + eq->cap - eq->cidx); 3576 } 3577 3578 /* 3579 * There are "can_reclaim" tx descriptors ready to be reclaimed. Reclaim as 3580 * many as possible but stop when there are around "n" mbufs to free. 3581 * 3582 * The actual number reclaimed is provided as the return value. 3583 */ 3584 static int 3585 reclaim_tx_descs(struct sge_txq *txq, int can_reclaim, int n) 3586 { 3587 struct tx_sdesc *txsd; 3588 struct tx_maps *txmaps; 3589 struct tx_map *txm; 3590 unsigned int reclaimed, maps; 3591 struct sge_eq *eq = &txq->eq; 3592 3593 TXQ_LOCK_ASSERT_OWNED(txq); 3594 3595 if (can_reclaim == 0) 3596 can_reclaim = reclaimable(eq); 3597 3598 maps = reclaimed = 0; 3599 while (can_reclaim && maps < n) { 3600 int ndesc; 3601 3602 txsd = &txq->sdesc[eq->cidx]; 3603 ndesc = txsd->desc_used; 3604 3605 /* Firmware doesn't return "partial" credits. */ 3606 KASSERT(can_reclaim >= ndesc, 3607 ("%s: unexpected number of credits: %d, %d", 3608 __func__, can_reclaim, ndesc)); 3609 3610 maps += txsd->credits; 3611 3612 reclaimed += ndesc; 3613 can_reclaim -= ndesc; 3614 3615 eq->cidx += ndesc; 3616 if (__predict_false(eq->cidx >= eq->cap)) 3617 eq->cidx -= eq->cap; 3618 } 3619 3620 txmaps = &txq->txmaps; 3621 txm = &txmaps->maps[txmaps->map_cidx]; 3622 if (maps) 3623 prefetch(txm->m); 3624 3625 eq->avail += reclaimed; 3626 KASSERT(eq->avail < eq->cap, /* avail tops out at (cap - 1) */ 3627 ("%s: too many descriptors available", __func__)); 3628 3629 txmaps->map_avail += maps; 3630 KASSERT(txmaps->map_avail <= txmaps->map_total, 3631 ("%s: too many maps available", __func__)); 3632 3633 while (maps--) { 3634 struct tx_map *next; 3635 3636 next = txm + 1; 3637 if (__predict_false(txmaps->map_cidx + 1 == txmaps->map_total)) 3638 next = txmaps->maps; 3639 prefetch(next->m); 3640 3641 bus_dmamap_unload(txq->tx_tag, txm->map); 3642 m_freem(txm->m); 3643 txm->m = NULL; 3644 3645 txm = next; 3646 if (__predict_false(++txmaps->map_cidx == txmaps->map_total)) 3647 txmaps->map_cidx = 0; 3648 } 3649 3650 return (reclaimed); 3651 } 3652 3653 static void 3654 write_eqflush_wr(struct sge_eq *eq) 3655 { 3656 struct fw_eq_flush_wr *wr; 3657 3658 EQ_LOCK_ASSERT_OWNED(eq); 3659 KASSERT(eq->avail > 0, ("%s: no descriptors left.", __func__)); 3660 KASSERT(!(eq->flags & EQ_CRFLUSHED), ("%s: flushed already", __func__)); 3661 3662 wr = (void *)&eq->desc[eq->pidx]; 3663 bzero(wr, sizeof(*wr)); 3664 wr->opcode = FW_EQ_FLUSH_WR; 3665 wr->equiq_to_len16 = htobe32(V_FW_WR_LEN16(sizeof(*wr) / 16) | 3666 F_FW_WR_EQUEQ | F_FW_WR_EQUIQ); 3667 3668 eq->flags |= (EQ_CRFLUSHED | EQ_STALLED); 3669 eq->pending++; 3670 eq->avail--; 3671 if (++eq->pidx == eq->cap) 3672 eq->pidx = 0; 3673 } 3674 3675 static __be64 3676 get_flit(bus_dma_segment_t *sgl, int nsegs, int idx) 3677 { 3678 int i = (idx / 3) * 2; 3679 3680 switch (idx % 3) { 3681 case 0: { 3682 __be64 rc; 3683 3684 rc = htobe32(sgl[i].ds_len); 3685 if (i + 1 < nsegs) 3686 rc |= (uint64_t)htobe32(sgl[i + 1].ds_len) << 32; 3687 3688 return (rc); 3689 } 3690 case 1: 3691 return htobe64(sgl[i].ds_addr); 3692 case 2: 3693 return htobe64(sgl[i + 1].ds_addr); 3694 } 3695 3696 return (0); 3697 } 3698 3699 static void 3700 set_fl_tag_idx(struct sge_fl *fl, int bufsize) 3701 { 3702 int i; 3703 3704 for (i = 0; i < FL_BUF_SIZES - 1; i++) { 3705 if (FL_BUF_SIZE(i) >= bufsize) 3706 break; 3707 } 3708 3709 fl->tag_idx = i; 3710 } 3711 3712 static void 3713 add_fl_to_sfl(struct adapter *sc, struct sge_fl *fl) 3714 { 3715 mtx_lock(&sc->sfl_lock); 3716 FL_LOCK(fl); 3717 if ((fl->flags & FL_DOOMED) == 0) { 3718 fl->flags |= FL_STARVING; 3719 TAILQ_INSERT_TAIL(&sc->sfl, fl, link); 3720 callout_reset(&sc->sfl_callout, hz / 5, refill_sfl, sc); 3721 } 3722 FL_UNLOCK(fl); 3723 mtx_unlock(&sc->sfl_lock); 3724 } 3725 3726 static int 3727 handle_sge_egr_update(struct sge_iq *iq, const struct rss_header *rss, 3728 struct mbuf *m) 3729 { 3730 const struct cpl_sge_egr_update *cpl = (const void *)(rss + 1); 3731 unsigned int qid = G_EGR_QID(ntohl(cpl->opcode_qid)); 3732 struct adapter *sc = iq->adapter; 3733 struct sge *s = &sc->sge; 3734 struct sge_eq *eq; 3735 3736 KASSERT(m == NULL, ("%s: payload with opcode %02x", __func__, 3737 rss->opcode)); 3738 3739 eq = s->eqmap[qid - s->eq_start]; 3740 EQ_LOCK(eq); 3741 KASSERT(eq->flags & EQ_CRFLUSHED, 3742 ("%s: unsolicited egress update", __func__)); 3743 eq->flags &= ~EQ_CRFLUSHED; 3744 eq->egr_update++; 3745 3746 if (__predict_false(eq->flags & EQ_DOOMED)) 3747 wakeup_one(eq); 3748 else if (eq->flags & EQ_STALLED && can_resume_tx(eq)) 3749 taskqueue_enqueue(sc->tq[eq->tx_chan], &eq->tx_task); 3750 EQ_UNLOCK(eq); 3751 3752 return (0); 3753 } 3754 3755 /* handle_fw_msg works for both fw4_msg and fw6_msg because this is valid */ 3756 CTASSERT(offsetof(struct cpl_fw4_msg, data) == \ 3757 offsetof(struct cpl_fw6_msg, data)); 3758 3759 static int 3760 handle_fw_msg(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m) 3761 { 3762 struct adapter *sc = iq->adapter; 3763 const struct cpl_fw6_msg *cpl = (const void *)(rss + 1); 3764 3765 KASSERT(m == NULL, ("%s: payload with opcode %02x", __func__, 3766 rss->opcode)); 3767 3768 if (cpl->type == FW_TYPE_RSSCPL || cpl->type == FW6_TYPE_RSSCPL) { 3769 const struct rss_header *rss2; 3770 3771 rss2 = (const struct rss_header *)&cpl->data[0]; 3772 return (sc->cpl_handler[rss2->opcode](iq, rss2, m)); 3773 } 3774 3775 return (sc->fw_msg_handler[cpl->type](sc, &cpl->data[0])); 3776 } 3777 3778 static int 3779 sysctl_uint16(SYSCTL_HANDLER_ARGS) 3780 { 3781 uint16_t *id = arg1; 3782 int i = *id; 3783 3784 return sysctl_handle_int(oidp, &i, 0, req); 3785 } 3786