Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/qlxgb/qla_isr.c
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1 /* 2 * Copyright (c) 2010-2011 Qlogic Corporation 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 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 COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 /* 29 * File: qla_isr.c 30 * Author : David C Somayajulu, Qlogic Corporation, Aliso Viejo, CA 92656. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD: releng/9.0/sys/dev/qlxgb/qla_isr.c 227064 2011-11-03 21:20:22Z bz $"); 35 36 #include "qla_os.h" 37 #include "qla_reg.h" 38 #include "qla_hw.h" 39 #include "qla_def.h" 40 #include "qla_inline.h" 41 #include "qla_ver.h" 42 #include "qla_glbl.h" 43 #include "qla_dbg.h" 44 45 static void qla_replenish_normal_rx(qla_host_t *ha, qla_sds_t *sdsp); 46 static void qla_replenish_jumbo_rx(qla_host_t *ha, qla_sds_t *sdsp); 47 48 /* 49 * Name: qla_rx_intr 50 * Function: Handles normal ethernet frames received 51 */ 52 static void 53 qla_rx_intr(qla_host_t *ha, uint64_t data, uint32_t sds_idx, 54 struct lro_ctrl *lro) 55 { 56 uint32_t idx, length, status, ring; 57 qla_rx_buf_t *rxb; 58 struct mbuf *mp; 59 struct ifnet *ifp = ha->ifp; 60 qla_sds_t *sdsp; 61 struct ether_vlan_header *eh; 62 63 sdsp = &ha->hw.sds[sds_idx]; 64 65 ring = (uint32_t)Q8_STAT_DESC_TYPE(data); 66 idx = (uint32_t)Q8_STAT_DESC_HANDLE(data); 67 length = (uint32_t)Q8_STAT_DESC_TOTAL_LENGTH(data); 68 status = (uint32_t)Q8_STAT_DESC_STATUS(data); 69 70 if (ring == 0) { 71 if ((idx >= NUM_RX_DESCRIPTORS) || (length > MCLBYTES)) { 72 device_printf(ha->pci_dev, "%s: ring[%d] index[0x%08x]" 73 " len[0x%08x] invalid\n", 74 __func__, ring, idx, length); 75 return; 76 } 77 } else { 78 if ((idx >= NUM_RX_JUMBO_DESCRIPTORS)||(length > MJUM9BYTES)) { 79 device_printf(ha->pci_dev, "%s: ring[%d] index[0x%08x]" 80 " len[0x%08x] invalid\n", 81 __func__, ring, idx, length); 82 return; 83 } 84 } 85 86 if (ring == 0) 87 rxb = &ha->rx_buf[idx]; 88 else 89 rxb = &ha->rx_jbuf[idx]; 90 91 QL_ASSERT((rxb != NULL),\ 92 ("%s: [r, i, sds_idx]=[%d, 0x%x, %d] rxb != NULL\n",\ 93 __func__, ring, idx, sds_idx)); 94 95 mp = rxb->m_head; 96 97 QL_ASSERT((mp != NULL),\ 98 ("%s: [r,i,rxb, sds_idx]=[%d, 0x%x, %p, %d] mp != NULL\n",\ 99 __func__, ring, idx, rxb, sds_idx)); 100 101 bus_dmamap_sync(ha->rx_tag, rxb->map, BUS_DMASYNC_POSTREAD); 102 103 if (ring == 0) { 104 rxb->m_head = NULL; 105 rxb->next = sdsp->rxb_free; 106 sdsp->rxb_free = rxb; 107 sdsp->rx_free++; 108 } else { 109 rxb->m_head = NULL; 110 rxb->next = sdsp->rxjb_free; 111 sdsp->rxjb_free = rxb; 112 sdsp->rxj_free++; 113 } 114 115 mp->m_len = length; 116 mp->m_pkthdr.len = length; 117 mp->m_pkthdr.rcvif = ifp; 118 119 eh = mtod(mp, struct ether_vlan_header *); 120 121 if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) { 122 uint32_t *data = (uint32_t *)eh; 123 124 mp->m_pkthdr.ether_vtag = ntohs(eh->evl_tag); 125 mp->m_flags |= M_VLANTAG; 126 127 *(data + 3) = *(data + 2); 128 *(data + 2) = *(data + 1); 129 *(data + 1) = *data; 130 131 m_adj(mp, ETHER_VLAN_ENCAP_LEN); 132 } 133 134 if (status == Q8_STAT_DESC_STATUS_CHKSUM_OK) { 135 mp->m_pkthdr.csum_flags = (CSUM_IP_CHECKED | CSUM_IP_VALID); 136 } else { 137 mp->m_pkthdr.csum_flags = 0; 138 } 139 140 if (lro->lro_cnt && (tcp_lro_rx(lro, mp, 0) == 0)) { 141 /* LRO packet has been successfuly queued */ 142 } else { 143 (*ifp->if_input)(ifp, mp); 144 } 145 146 if (sdsp->rx_free > std_replenish) 147 qla_replenish_normal_rx(ha, sdsp); 148 149 if (sdsp->rxj_free > jumbo_replenish) 150 qla_replenish_jumbo_rx(ha, sdsp); 151 152 return; 153 } 154 155 static void 156 qla_replenish_jumbo_rx(qla_host_t *ha, qla_sds_t *sdsp) 157 { 158 qla_rx_buf_t *rxb; 159 int count = jumbo_replenish; 160 uint32_t rxj_next; 161 162 if (!mtx_trylock(&ha->rxj_lock)) 163 return; 164 165 rxj_next = ha->hw.rxj_next; 166 167 while (count--) { 168 rxb = sdsp->rxjb_free; 169 170 if (rxb == NULL) 171 break; 172 173 sdsp->rxjb_free = rxb->next; 174 sdsp->rxj_free--; 175 176 177 if (qla_get_mbuf(ha, rxb, NULL, RDS_RING_INDEX_JUMBO) == 0) { 178 qla_set_hw_rcv_desc(ha, RDS_RING_INDEX_JUMBO, 179 ha->hw.rxj_in, rxb->handle, rxb->paddr, 180 (rxb->m_head)->m_pkthdr.len); 181 ha->hw.rxj_in++; 182 if (ha->hw.rxj_in == NUM_RX_JUMBO_DESCRIPTORS) 183 ha->hw.rxj_in = 0; 184 ha->hw.rxj_next++; 185 if (ha->hw.rxj_next == NUM_RX_JUMBO_DESCRIPTORS) 186 ha->hw.rxj_next = 0; 187 } else { 188 device_printf(ha->pci_dev, 189 "%s: qla_get_mbuf [1,(%d),(%d)] failed\n", 190 __func__, ha->hw.rxj_in, rxb->handle); 191 192 rxb->m_head = NULL; 193 rxb->next = sdsp->rxjb_free; 194 sdsp->rxjb_free = rxb; 195 sdsp->rxj_free++; 196 197 break; 198 } 199 } 200 201 if (rxj_next != ha->hw.rxj_next) { 202 QL_UPDATE_RDS_PRODUCER_INDEX(ha, 1, ha->hw.rxj_next); 203 } 204 mtx_unlock(&ha->rxj_lock); 205 } 206 207 static void 208 qla_replenish_normal_rx(qla_host_t *ha, qla_sds_t *sdsp) 209 { 210 qla_rx_buf_t *rxb; 211 int count = std_replenish; 212 uint32_t rx_next; 213 214 if (!mtx_trylock(&ha->rx_lock)) 215 return; 216 217 rx_next = ha->hw.rx_next; 218 219 while (count--) { 220 rxb = sdsp->rxb_free; 221 222 if (rxb == NULL) 223 break; 224 225 sdsp->rxb_free = rxb->next; 226 sdsp->rx_free--; 227 228 if (qla_get_mbuf(ha, rxb, NULL, RDS_RING_INDEX_NORMAL) == 0) { 229 qla_set_hw_rcv_desc(ha, RDS_RING_INDEX_NORMAL, 230 ha->hw.rx_in, rxb->handle, rxb->paddr, 231 (rxb->m_head)->m_pkthdr.len); 232 ha->hw.rx_in++; 233 if (ha->hw.rx_in == NUM_RX_DESCRIPTORS) 234 ha->hw.rx_in = 0; 235 ha->hw.rx_next++; 236 if (ha->hw.rx_next == NUM_RX_DESCRIPTORS) 237 ha->hw.rx_next = 0; 238 } else { 239 device_printf(ha->pci_dev, 240 "%s: qla_get_mbuf [0,(%d),(%d)] failed\n", 241 __func__, ha->hw.rx_in, rxb->handle); 242 243 rxb->m_head = NULL; 244 rxb->next = sdsp->rxb_free; 245 sdsp->rxb_free = rxb; 246 sdsp->rx_free++; 247 248 break; 249 } 250 } 251 252 if (rx_next != ha->hw.rx_next) { 253 QL_UPDATE_RDS_PRODUCER_INDEX(ha, 0, ha->hw.rx_next); 254 } 255 mtx_unlock(&ha->rx_lock); 256 } 257 258 /* 259 * Name: qla_isr 260 * Function: Main Interrupt Service Routine 261 */ 262 static uint32_t 263 qla_rcv_isr(qla_host_t *ha, uint32_t sds_idx, uint32_t count) 264 { 265 device_t dev; 266 qla_hw_t *hw; 267 uint32_t comp_idx, desc_count; 268 q80_stat_desc_t *sdesc; 269 struct lro_ctrl *lro; 270 struct lro_entry *queued; 271 uint32_t ret = 0; 272 273 dev = ha->pci_dev; 274 hw = &ha->hw; 275 276 hw->sds[sds_idx].rcv_active = 1; 277 if (ha->flags.stop_rcv) { 278 hw->sds[sds_idx].rcv_active = 0; 279 return 0; 280 } 281 282 QL_DPRINT2((dev, "%s: [%d]enter\n", __func__, sds_idx)); 283 284 /* 285 * receive interrupts 286 */ 287 comp_idx = hw->sds[sds_idx].sdsr_next; 288 lro = &hw->sds[sds_idx].lro; 289 290 while (count--) { 291 292 sdesc = (q80_stat_desc_t *) 293 &hw->sds[sds_idx].sds_ring_base[comp_idx]; 294 295 if (Q8_STAT_DESC_OWNER((sdesc->data[0])) != 296 Q8_STAT_DESC_OWNER_HOST) { 297 QL_DPRINT2((dev, "%s: data %p sdsr_next 0x%08x\n", 298 __func__, (void *)sdesc->data[0], comp_idx)); 299 break; 300 } 301 302 desc_count = Q8_STAT_DESC_COUNT((sdesc->data[0])); 303 304 switch (Q8_STAT_DESC_OPCODE((sdesc->data[0]))) { 305 306 case Q8_STAT_DESC_OPCODE_RCV_PKT: 307 case Q8_STAT_DESC_OPCODE_SYN_OFFLOAD: 308 qla_rx_intr(ha, (sdesc->data[0]), sds_idx, lro); 309 310 break; 311 312 default: 313 device_printf(dev, "%s: default 0x%llx!\n", __func__, 314 (long long unsigned int)sdesc->data[0]); 315 break; 316 } 317 318 while (desc_count--) { 319 sdesc->data[0] = 320 Q8_STAT_DESC_SET_OWNER(Q8_STAT_DESC_OWNER_FW); 321 comp_idx = (comp_idx + 1) & (NUM_STATUS_DESCRIPTORS-1); 322 sdesc = (q80_stat_desc_t *) 323 &hw->sds[sds_idx].sds_ring_base[comp_idx]; 324 } 325 } 326 327 while((!SLIST_EMPTY(&lro->lro_active))) { 328 queued = SLIST_FIRST(&lro->lro_active); 329 SLIST_REMOVE_HEAD(&lro->lro_active, next); 330 tcp_lro_flush(lro, queued); 331 } 332 333 if (hw->sds[sds_idx].sdsr_next != comp_idx) { 334 QL_UPDATE_SDS_CONSUMER_INDEX(ha, sds_idx, comp_idx); 335 } 336 hw->sds[sds_idx].sdsr_next = comp_idx; 337 338 sdesc = (q80_stat_desc_t *)&hw->sds[sds_idx].sds_ring_base[comp_idx]; 339 if ((sds_idx == 0) && (Q8_STAT_DESC_OWNER((sdesc->data[0])) == 340 Q8_STAT_DESC_OWNER_HOST)) { 341 ret = -1; 342 } 343 344 hw->sds[sds_idx].rcv_active = 0; 345 return (ret); 346 } 347 348 void 349 qla_isr(void *arg) 350 { 351 qla_ivec_t *ivec = arg; 352 qla_host_t *ha; 353 uint32_t sds_idx; 354 uint32_t ret; 355 356 ha = ivec->ha; 357 sds_idx = ivec->irq_rid - 1; 358 359 if (sds_idx >= ha->hw.num_sds_rings) { 360 device_printf(ha->pci_dev, "%s: bogus sds_idx 0x%x\n", __func__, 361 sds_idx); 362 363 return; 364 } 365 366 if (sds_idx == 0) 367 taskqueue_enqueue(ha->tx_tq, &ha->tx_task); 368 369 ret = qla_rcv_isr(ha, sds_idx, rcv_pkt_thres); 370 371 if (sds_idx == 0) 372 taskqueue_enqueue(ha->tx_tq, &ha->tx_task); 373 374 if (ret) { 375 taskqueue_enqueue(ha->irq_vec[sds_idx].rcv_tq, 376 &ha->irq_vec[sds_idx].rcv_task); 377 } else { 378 QL_ENABLE_INTERRUPTS(ha, sds_idx); 379 } 380 } 381 382 void 383 qla_rcv(void *context, int pending) 384 { 385 qla_ivec_t *ivec = context; 386 qla_host_t *ha; 387 device_t dev; 388 qla_hw_t *hw; 389 uint32_t sds_idx; 390 uint32_t ret; 391 struct ifnet *ifp; 392 393 ha = ivec->ha; 394 dev = ha->pci_dev; 395 hw = &ha->hw; 396 sds_idx = ivec->irq_rid - 1; 397 ifp = ha->ifp; 398 399 do { 400 if (sds_idx == 0) { 401 if (qla_le32_to_host(*(hw->tx_cons)) != hw->txr_comp) { 402 taskqueue_enqueue(ha->tx_tq, &ha->tx_task); 403 } else if ((ifp->if_snd.ifq_head != NULL) && 404 QL_RUNNING(ifp)) { 405 taskqueue_enqueue(ha->tx_tq, &ha->tx_task); 406 } 407 } 408 ret = qla_rcv_isr(ha, sds_idx, rcv_pkt_thres_d); 409 } while (ret); 410 411 if (sds_idx == 0) 412 taskqueue_enqueue(ha->tx_tq, &ha->tx_task); 413 414 QL_ENABLE_INTERRUPTS(ha, sds_idx); 415 } 416
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