1 /******************************************************************************* 2 3 Intel 10 Gigabit PCI Express Linux driver 4 Copyright(c) 1999 - 2013 Intel Corporation. 5 6 This program is free software; you can redistribute it and/or modify it 7 under the terms and conditions of the GNU General Public License, 8 version 2, as published by the Free Software Foundation. 9 10 This program is distributed in the hope it will be useful, but WITHOUT 11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 more details. 14 15 You should have received a copy of the GNU General Public License along with 16 this program; if not, write to the Free Software Foundation, Inc., 17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 18 19 The full GNU General Public License is included in this distribution in 20 the file called "COPYING". 21 22 Contact Information: 23 Linux NICS <linux.nics@intel.com> 24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> 25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 26 27 *******************************************************************************/ 28 29 #include "ixgbe.h" 30 #include <linux/if_ether.h> 31 #include <linux/gfp.h> 32 #include <linux/if_vlan.h> 33 #include <scsi/scsi_cmnd.h> 34 #include <scsi/scsi_device.h> 35 #include <scsi/fc/fc_fs.h> 36 #include <scsi/fc/fc_fcoe.h> 37 #include <scsi/libfc.h> 38 #include <scsi/libfcoe.h> 39 40 /** 41 * ixgbe_fcoe_clear_ddp - clear the given ddp context 42 * @ddp: ptr to the ixgbe_fcoe_ddp 43 * 44 * Returns : none 45 * 46 */ 47 static inline void ixgbe_fcoe_clear_ddp(struct ixgbe_fcoe_ddp *ddp) 48 { 49 ddp->len = 0; 50 ddp->err = 1; 51 ddp->udl = NULL; 52 ddp->udp = 0UL; 53 ddp->sgl = NULL; 54 ddp->sgc = 0; 55 } 56 57 /** 58 * ixgbe_fcoe_ddp_put - free the ddp context for a given xid 59 * @netdev: the corresponding net_device 60 * @xid: the xid that corresponding ddp will be freed 61 * 62 * This is the implementation of net_device_ops.ndo_fcoe_ddp_done 63 * and it is expected to be called by ULD, i.e., FCP layer of libfc 64 * to release the corresponding ddp context when the I/O is done. 65 * 66 * Returns : data length already ddp-ed in bytes 67 */ 68 int ixgbe_fcoe_ddp_put(struct net_device *netdev, u16 xid) 69 { 70 int len = 0; 71 struct ixgbe_fcoe *fcoe; 72 struct ixgbe_adapter *adapter; 73 struct ixgbe_fcoe_ddp *ddp; 74 u32 fcbuff; 75 76 if (!netdev) 77 goto out_ddp_put; 78 79 if (xid >= IXGBE_FCOE_DDP_MAX) 80 goto out_ddp_put; 81 82 adapter = netdev_priv(netdev); 83 fcoe = &adapter->fcoe; 84 ddp = &fcoe->ddp[xid]; 85 if (!ddp->udl) 86 goto out_ddp_put; 87 88 len = ddp->len; 89 /* if there an error, force to invalidate ddp context */ 90 if (ddp->err) { 91 spin_lock_bh(&fcoe->lock); 92 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCFLT, 0); 93 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCFLTRW, 94 (xid | IXGBE_FCFLTRW_WE)); 95 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCBUFF, 0); 96 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCDMARW, 97 (xid | IXGBE_FCDMARW_WE)); 98 99 /* guaranteed to be invalidated after 100us */ 100 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCDMARW, 101 (xid | IXGBE_FCDMARW_RE)); 102 fcbuff = IXGBE_READ_REG(&adapter->hw, IXGBE_FCBUFF); 103 spin_unlock_bh(&fcoe->lock); 104 if (fcbuff & IXGBE_FCBUFF_VALID) 105 udelay(100); 106 } 107 if (ddp->sgl) 108 dma_unmap_sg(&adapter->pdev->dev, ddp->sgl, ddp->sgc, 109 DMA_FROM_DEVICE); 110 if (ddp->pool) { 111 dma_pool_free(ddp->pool, ddp->udl, ddp->udp); 112 ddp->pool = NULL; 113 } 114 115 ixgbe_fcoe_clear_ddp(ddp); 116 117 out_ddp_put: 118 return len; 119 } 120 121 /** 122 * ixgbe_fcoe_ddp_setup - called to set up ddp context 123 * @netdev: the corresponding net_device 124 * @xid: the exchange id requesting ddp 125 * @sgl: the scatter-gather list for this request 126 * @sgc: the number of scatter-gather items 127 * 128 * Returns : 1 for success and 0 for no ddp 129 */ 130 static int ixgbe_fcoe_ddp_setup(struct net_device *netdev, u16 xid, 131 struct scatterlist *sgl, unsigned int sgc, 132 int target_mode) 133 { 134 struct ixgbe_adapter *adapter; 135 struct ixgbe_hw *hw; 136 struct ixgbe_fcoe *fcoe; 137 struct ixgbe_fcoe_ddp *ddp; 138 struct ixgbe_fcoe_ddp_pool *ddp_pool; 139 struct scatterlist *sg; 140 unsigned int i, j, dmacount; 141 unsigned int len; 142 static const unsigned int bufflen = IXGBE_FCBUFF_MIN; 143 unsigned int firstoff = 0; 144 unsigned int lastsize; 145 unsigned int thisoff = 0; 146 unsigned int thislen = 0; 147 u32 fcbuff, fcdmarw, fcfltrw, fcrxctl; 148 dma_addr_t addr = 0; 149 150 if (!netdev || !sgl) 151 return 0; 152 153 adapter = netdev_priv(netdev); 154 if (xid >= IXGBE_FCOE_DDP_MAX) { 155 e_warn(drv, "xid=0x%x out-of-range\n", xid); 156 return 0; 157 } 158 159 /* no DDP if we are already down or resetting */ 160 if (test_bit(__IXGBE_DOWN, &adapter->state) || 161 test_bit(__IXGBE_RESETTING, &adapter->state)) 162 return 0; 163 164 fcoe = &adapter->fcoe; 165 ddp = &fcoe->ddp[xid]; 166 if (ddp->sgl) { 167 e_err(drv, "xid 0x%x w/ non-null sgl=%p nents=%d\n", 168 xid, ddp->sgl, ddp->sgc); 169 return 0; 170 } 171 ixgbe_fcoe_clear_ddp(ddp); 172 173 174 if (!fcoe->ddp_pool) { 175 e_warn(drv, "No ddp_pool resources allocated\n"); 176 return 0; 177 } 178 179 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, get_cpu()); 180 if (!ddp_pool->pool) { 181 e_warn(drv, "xid=0x%x no ddp pool for fcoe\n", xid); 182 goto out_noddp; 183 } 184 185 /* setup dma from scsi command sgl */ 186 dmacount = dma_map_sg(&adapter->pdev->dev, sgl, sgc, DMA_FROM_DEVICE); 187 if (dmacount == 0) { 188 e_err(drv, "xid 0x%x DMA map error\n", xid); 189 goto out_noddp; 190 } 191 192 /* alloc the udl from per cpu ddp pool */ 193 ddp->udl = dma_pool_alloc(ddp_pool->pool, GFP_ATOMIC, &ddp->udp); 194 if (!ddp->udl) { 195 e_err(drv, "failed allocated ddp context\n"); 196 goto out_noddp_unmap; 197 } 198 ddp->pool = ddp_pool->pool; 199 ddp->sgl = sgl; 200 ddp->sgc = sgc; 201 202 j = 0; 203 for_each_sg(sgl, sg, dmacount, i) { 204 addr = sg_dma_address(sg); 205 len = sg_dma_len(sg); 206 while (len) { 207 /* max number of buffers allowed in one DDP context */ 208 if (j >= IXGBE_BUFFCNT_MAX) { 209 ddp_pool->noddp++; 210 goto out_noddp_free; 211 } 212 213 /* get the offset of length of current buffer */ 214 thisoff = addr & ((dma_addr_t)bufflen - 1); 215 thislen = min((bufflen - thisoff), len); 216 /* 217 * all but the 1st buffer (j == 0) 218 * must be aligned on bufflen 219 */ 220 if ((j != 0) && (thisoff)) 221 goto out_noddp_free; 222 /* 223 * all but the last buffer 224 * ((i == (dmacount - 1)) && (thislen == len)) 225 * must end at bufflen 226 */ 227 if (((i != (dmacount - 1)) || (thislen != len)) 228 && ((thislen + thisoff) != bufflen)) 229 goto out_noddp_free; 230 231 ddp->udl[j] = (u64)(addr - thisoff); 232 /* only the first buffer may have none-zero offset */ 233 if (j == 0) 234 firstoff = thisoff; 235 len -= thislen; 236 addr += thislen; 237 j++; 238 } 239 } 240 /* only the last buffer may have non-full bufflen */ 241 lastsize = thisoff + thislen; 242 243 /* 244 * lastsize can not be buffer len. 245 * If it is then adding another buffer with lastsize = 1. 246 */ 247 if (lastsize == bufflen) { 248 if (j >= IXGBE_BUFFCNT_MAX) { 249 ddp_pool->noddp_ext_buff++; 250 goto out_noddp_free; 251 } 252 253 ddp->udl[j] = (u64)(fcoe->extra_ddp_buffer_dma); 254 j++; 255 lastsize = 1; 256 } 257 put_cpu(); 258 259 fcbuff = (IXGBE_FCBUFF_4KB << IXGBE_FCBUFF_BUFFSIZE_SHIFT); 260 fcbuff |= ((j & 0xff) << IXGBE_FCBUFF_BUFFCNT_SHIFT); 261 fcbuff |= (firstoff << IXGBE_FCBUFF_OFFSET_SHIFT); 262 /* Set WRCONTX bit to allow DDP for target */ 263 if (target_mode) 264 fcbuff |= (IXGBE_FCBUFF_WRCONTX); 265 fcbuff |= (IXGBE_FCBUFF_VALID); 266 267 fcdmarw = xid; 268 fcdmarw |= IXGBE_FCDMARW_WE; 269 fcdmarw |= (lastsize << IXGBE_FCDMARW_LASTSIZE_SHIFT); 270 271 fcfltrw = xid; 272 fcfltrw |= IXGBE_FCFLTRW_WE; 273 274 /* program DMA context */ 275 hw = &adapter->hw; 276 spin_lock_bh(&fcoe->lock); 277 278 /* turn on last frame indication for target mode as FCP_RSPtarget is 279 * supposed to send FCP_RSP when it is done. */ 280 if (target_mode && !test_bit(__IXGBE_FCOE_TARGET, &fcoe->mode)) { 281 set_bit(__IXGBE_FCOE_TARGET, &fcoe->mode); 282 fcrxctl = IXGBE_READ_REG(hw, IXGBE_FCRXCTRL); 283 fcrxctl |= IXGBE_FCRXCTRL_LASTSEQH; 284 IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL, fcrxctl); 285 } 286 287 IXGBE_WRITE_REG(hw, IXGBE_FCPTRL, ddp->udp & DMA_BIT_MASK(32)); 288 IXGBE_WRITE_REG(hw, IXGBE_FCPTRH, (u64)ddp->udp >> 32); 289 IXGBE_WRITE_REG(hw, IXGBE_FCBUFF, fcbuff); 290 IXGBE_WRITE_REG(hw, IXGBE_FCDMARW, fcdmarw); 291 /* program filter context */ 292 IXGBE_WRITE_REG(hw, IXGBE_FCPARAM, 0); 293 IXGBE_WRITE_REG(hw, IXGBE_FCFLT, IXGBE_FCFLT_VALID); 294 IXGBE_WRITE_REG(hw, IXGBE_FCFLTRW, fcfltrw); 295 296 spin_unlock_bh(&fcoe->lock); 297 298 return 1; 299 300 out_noddp_free: 301 dma_pool_free(ddp->pool, ddp->udl, ddp->udp); 302 ixgbe_fcoe_clear_ddp(ddp); 303 304 out_noddp_unmap: 305 dma_unmap_sg(&adapter->pdev->dev, sgl, sgc, DMA_FROM_DEVICE); 306 out_noddp: 307 put_cpu(); 308 return 0; 309 } 310 311 /** 312 * ixgbe_fcoe_ddp_get - called to set up ddp context in initiator mode 313 * @netdev: the corresponding net_device 314 * @xid: the exchange id requesting ddp 315 * @sgl: the scatter-gather list for this request 316 * @sgc: the number of scatter-gather items 317 * 318 * This is the implementation of net_device_ops.ndo_fcoe_ddp_setup 319 * and is expected to be called from ULD, e.g., FCP layer of libfc 320 * to set up ddp for the corresponding xid of the given sglist for 321 * the corresponding I/O. 322 * 323 * Returns : 1 for success and 0 for no ddp 324 */ 325 int ixgbe_fcoe_ddp_get(struct net_device *netdev, u16 xid, 326 struct scatterlist *sgl, unsigned int sgc) 327 { 328 return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 0); 329 } 330 331 /** 332 * ixgbe_fcoe_ddp_target - called to set up ddp context in target mode 333 * @netdev: the corresponding net_device 334 * @xid: the exchange id requesting ddp 335 * @sgl: the scatter-gather list for this request 336 * @sgc: the number of scatter-gather items 337 * 338 * This is the implementation of net_device_ops.ndo_fcoe_ddp_target 339 * and is expected to be called from ULD, e.g., FCP layer of libfc 340 * to set up ddp for the corresponding xid of the given sglist for 341 * the corresponding I/O. The DDP in target mode is a write I/O request 342 * from the initiator. 343 * 344 * Returns : 1 for success and 0 for no ddp 345 */ 346 int ixgbe_fcoe_ddp_target(struct net_device *netdev, u16 xid, 347 struct scatterlist *sgl, unsigned int sgc) 348 { 349 return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 1); 350 } 351 352 /** 353 * ixgbe_fcoe_ddp - check ddp status and mark it done 354 * @adapter: ixgbe adapter 355 * @rx_desc: advanced rx descriptor 356 * @skb: the skb holding the received data 357 * 358 * This checks ddp status. 359 * 360 * Returns : < 0 indicates an error or not a FCiE ddp, 0 indicates 361 * not passing the skb to ULD, > 0 indicates is the length of data 362 * being ddped. 363 */ 364 int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter, 365 union ixgbe_adv_rx_desc *rx_desc, 366 struct sk_buff *skb) 367 { 368 int rc = -EINVAL; 369 struct ixgbe_fcoe *fcoe; 370 struct ixgbe_fcoe_ddp *ddp; 371 struct fc_frame_header *fh; 372 struct fcoe_crc_eof *crc; 373 __le32 fcerr = ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_FCERR); 374 __le32 ddp_err; 375 u32 fctl; 376 u16 xid; 377 378 if (fcerr == cpu_to_le32(IXGBE_FCERR_BADCRC)) 379 skb->ip_summed = CHECKSUM_NONE; 380 else 381 skb->ip_summed = CHECKSUM_UNNECESSARY; 382 383 if (eth_hdr(skb)->h_proto == htons(ETH_P_8021Q)) 384 fh = (struct fc_frame_header *)(skb->data + 385 sizeof(struct vlan_hdr) + sizeof(struct fcoe_hdr)); 386 else 387 fh = (struct fc_frame_header *)(skb->data + 388 sizeof(struct fcoe_hdr)); 389 390 fctl = ntoh24(fh->fh_f_ctl); 391 if (fctl & FC_FC_EX_CTX) 392 xid = be16_to_cpu(fh->fh_ox_id); 393 else 394 xid = be16_to_cpu(fh->fh_rx_id); 395 396 if (xid >= IXGBE_FCOE_DDP_MAX) 397 goto ddp_out; 398 399 fcoe = &adapter->fcoe; 400 ddp = &fcoe->ddp[xid]; 401 if (!ddp->udl) 402 goto ddp_out; 403 404 ddp_err = ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_FCEOFE | 405 IXGBE_RXDADV_ERR_FCERR); 406 if (ddp_err) 407 goto ddp_out; 408 409 switch (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_STAT_FCSTAT)) { 410 /* return 0 to bypass going to ULD for DDPed data */ 411 case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_DDP): 412 /* update length of DDPed data */ 413 ddp->len = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss); 414 rc = 0; 415 break; 416 /* unmap the sg list when FCPRSP is received */ 417 case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_FCPRSP): 418 dma_unmap_sg(&adapter->pdev->dev, ddp->sgl, 419 ddp->sgc, DMA_FROM_DEVICE); 420 ddp->err = ddp_err; 421 ddp->sgl = NULL; 422 ddp->sgc = 0; 423 /* fall through */ 424 /* if DDP length is present pass it through to ULD */ 425 case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_NODDP): 426 /* update length of DDPed data */ 427 ddp->len = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss); 428 if (ddp->len) 429 rc = ddp->len; 430 break; 431 /* no match will return as an error */ 432 case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_NOMTCH): 433 default: 434 break; 435 } 436 437 /* In target mode, check the last data frame of the sequence. 438 * For DDP in target mode, data is already DDPed but the header 439 * indication of the last data frame ould allow is to tell if we 440 * got all the data and the ULP can send FCP_RSP back, as this is 441 * not a full fcoe frame, we fill the trailer here so it won't be 442 * dropped by the ULP stack. 443 */ 444 if ((fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA) && 445 (fctl & FC_FC_END_SEQ)) { 446 skb_linearize(skb); 447 crc = (struct fcoe_crc_eof *)skb_put(skb, sizeof(*crc)); 448 crc->fcoe_eof = FC_EOF_T; 449 } 450 ddp_out: 451 return rc; 452 } 453 454 /** 455 * ixgbe_fso - ixgbe FCoE Sequence Offload (FSO) 456 * @tx_ring: tx desc ring 457 * @first: first tx_buffer structure containing skb, tx_flags, and protocol 458 * @hdr_len: hdr_len to be returned 459 * 460 * This sets up large send offload for FCoE 461 * 462 * Returns : 0 indicates success, < 0 for error 463 */ 464 int ixgbe_fso(struct ixgbe_ring *tx_ring, 465 struct ixgbe_tx_buffer *first, 466 u8 *hdr_len) 467 { 468 struct sk_buff *skb = first->skb; 469 struct fc_frame_header *fh; 470 u32 vlan_macip_lens; 471 u32 fcoe_sof_eof = 0; 472 u32 mss_l4len_idx; 473 u8 sof, eof; 474 475 if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_type != SKB_GSO_FCOE)) { 476 dev_err(tx_ring->dev, "Wrong gso type %d:expecting SKB_GSO_FCOE\n", 477 skb_shinfo(skb)->gso_type); 478 return -EINVAL; 479 } 480 481 /* resets the header to point fcoe/fc */ 482 skb_set_network_header(skb, skb->mac_len); 483 skb_set_transport_header(skb, skb->mac_len + 484 sizeof(struct fcoe_hdr)); 485 486 /* sets up SOF and ORIS */ 487 sof = ((struct fcoe_hdr *)skb_network_header(skb))->fcoe_sof; 488 switch (sof) { 489 case FC_SOF_I2: 490 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_ORIS; 491 break; 492 case FC_SOF_I3: 493 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_SOF | 494 IXGBE_ADVTXD_FCOEF_ORIS; 495 break; 496 case FC_SOF_N2: 497 break; 498 case FC_SOF_N3: 499 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_SOF; 500 break; 501 default: 502 dev_warn(tx_ring->dev, "unknown sof = 0x%x\n", sof); 503 return -EINVAL; 504 } 505 506 /* the first byte of the last dword is EOF */ 507 skb_copy_bits(skb, skb->len - 4, &eof, 1); 508 /* sets up EOF and ORIE */ 509 switch (eof) { 510 case FC_EOF_N: 511 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N; 512 break; 513 case FC_EOF_T: 514 /* lso needs ORIE */ 515 if (skb_is_gso(skb)) 516 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N | 517 IXGBE_ADVTXD_FCOEF_ORIE; 518 else 519 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_T; 520 break; 521 case FC_EOF_NI: 522 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_NI; 523 break; 524 case FC_EOF_A: 525 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_A; 526 break; 527 default: 528 dev_warn(tx_ring->dev, "unknown eof = 0x%x\n", eof); 529 return -EINVAL; 530 } 531 532 /* sets up PARINC indicating data offset */ 533 fh = (struct fc_frame_header *)skb_transport_header(skb); 534 if (fh->fh_f_ctl[2] & FC_FC_REL_OFF) 535 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_PARINC; 536 537 /* include trailer in headlen as it is replicated per frame */ 538 *hdr_len = sizeof(struct fcoe_crc_eof); 539 540 /* hdr_len includes fc_hdr if FCoE LSO is enabled */ 541 if (skb_is_gso(skb)) { 542 *hdr_len += skb_transport_offset(skb) + 543 sizeof(struct fc_frame_header); 544 /* update gso_segs and bytecount */ 545 first->gso_segs = DIV_ROUND_UP(skb->len - *hdr_len, 546 skb_shinfo(skb)->gso_size); 547 first->bytecount += (first->gso_segs - 1) * *hdr_len; 548 first->tx_flags |= IXGBE_TX_FLAGS_TSO; 549 } 550 551 /* set flag indicating FCOE to ixgbe_tx_map call */ 552 first->tx_flags |= IXGBE_TX_FLAGS_FCOE | IXGBE_TX_FLAGS_CC; 553 554 /* mss_l4len_id: use 0 for FSO as TSO, no need for L4LEN */ 555 mss_l4len_idx = skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT; 556 557 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */ 558 vlan_macip_lens = skb_transport_offset(skb) + 559 sizeof(struct fc_frame_header); 560 vlan_macip_lens |= (skb_transport_offset(skb) - 4) 561 << IXGBE_ADVTXD_MACLEN_SHIFT; 562 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK; 563 564 /* write context desc */ 565 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, fcoe_sof_eof, 566 IXGBE_ADVTXT_TUCMD_FCOE, mss_l4len_idx); 567 568 return 0; 569 } 570 571 static void ixgbe_fcoe_dma_pool_free(struct ixgbe_fcoe *fcoe, unsigned int cpu) 572 { 573 struct ixgbe_fcoe_ddp_pool *ddp_pool; 574 575 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu); 576 if (ddp_pool->pool) 577 dma_pool_destroy(ddp_pool->pool); 578 ddp_pool->pool = NULL; 579 } 580 581 static int ixgbe_fcoe_dma_pool_alloc(struct ixgbe_fcoe *fcoe, 582 struct device *dev, 583 unsigned int cpu) 584 { 585 struct ixgbe_fcoe_ddp_pool *ddp_pool; 586 struct dma_pool *pool; 587 char pool_name[32]; 588 589 snprintf(pool_name, 32, "ixgbe_fcoe_ddp_%u", cpu); 590 591 pool = dma_pool_create(pool_name, dev, IXGBE_FCPTR_MAX, 592 IXGBE_FCPTR_ALIGN, PAGE_SIZE); 593 if (!pool) 594 return -ENOMEM; 595 596 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu); 597 ddp_pool->pool = pool; 598 ddp_pool->noddp = 0; 599 ddp_pool->noddp_ext_buff = 0; 600 601 return 0; 602 } 603 604 /** 605 * ixgbe_configure_fcoe - configures registers for fcoe at start 606 * @adapter: ptr to ixgbe adapter 607 * 608 * This sets up FCoE related registers 609 * 610 * Returns : none 611 */ 612 void ixgbe_configure_fcoe(struct ixgbe_adapter *adapter) 613 { 614 struct ixgbe_ring_feature *fcoe = &adapter->ring_feature[RING_F_FCOE]; 615 struct ixgbe_hw *hw = &adapter->hw; 616 int i, fcoe_q, fcoe_i; 617 u32 etqf; 618 619 /* Minimal functionality for FCoE requires at least CRC offloads */ 620 if (!(adapter->netdev->features & NETIF_F_FCOE_CRC)) 621 return; 622 623 /* Enable L2 EtherType filter for FCoE, needed for FCoE CRC and DDP */ 624 etqf = ETH_P_FCOE | IXGBE_ETQF_FCOE | IXGBE_ETQF_FILTER_EN; 625 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) { 626 etqf |= IXGBE_ETQF_POOL_ENABLE; 627 etqf |= VMDQ_P(0) << IXGBE_ETQF_POOL_SHIFT; 628 } 629 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FCOE), etqf); 630 IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FCOE), 0); 631 632 /* leave registers un-configured if FCoE is disabled */ 633 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) 634 return; 635 636 /* Use one or more Rx queues for FCoE by redirection table */ 637 for (i = 0; i < IXGBE_FCRETA_SIZE; i++) { 638 fcoe_i = fcoe->offset + (i % fcoe->indices); 639 fcoe_i &= IXGBE_FCRETA_ENTRY_MASK; 640 fcoe_q = adapter->rx_ring[fcoe_i]->reg_idx; 641 IXGBE_WRITE_REG(hw, IXGBE_FCRETA(i), fcoe_q); 642 } 643 IXGBE_WRITE_REG(hw, IXGBE_FCRECTL, IXGBE_FCRECTL_ENA); 644 645 /* Enable L2 EtherType filter for FIP */ 646 etqf = ETH_P_FIP | IXGBE_ETQF_FILTER_EN; 647 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) { 648 etqf |= IXGBE_ETQF_POOL_ENABLE; 649 etqf |= VMDQ_P(0) << IXGBE_ETQF_POOL_SHIFT; 650 } 651 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FIP), etqf); 652 653 /* Send FIP frames to the first FCoE queue */ 654 fcoe_q = adapter->rx_ring[fcoe->offset]->reg_idx; 655 IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FIP), 656 IXGBE_ETQS_QUEUE_EN | 657 (fcoe_q << IXGBE_ETQS_RX_QUEUE_SHIFT)); 658 659 /* Configure FCoE Rx control */ 660 IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL, 661 IXGBE_FCRXCTRL_FCCRCBO | 662 (FC_FCOE_VER << IXGBE_FCRXCTRL_FCOEVER_SHIFT)); 663 } 664 665 /** 666 * ixgbe_free_fcoe_ddp_resources - release all fcoe ddp context resources 667 * @adapter : ixgbe adapter 668 * 669 * Cleans up outstanding ddp context resources 670 * 671 * Returns : none 672 */ 673 void ixgbe_free_fcoe_ddp_resources(struct ixgbe_adapter *adapter) 674 { 675 struct ixgbe_fcoe *fcoe = &adapter->fcoe; 676 int cpu, i; 677 678 /* do nothing if no DDP pools were allocated */ 679 if (!fcoe->ddp_pool) 680 return; 681 682 for (i = 0; i < IXGBE_FCOE_DDP_MAX; i++) 683 ixgbe_fcoe_ddp_put(adapter->netdev, i); 684 685 for_each_possible_cpu(cpu) 686 ixgbe_fcoe_dma_pool_free(fcoe, cpu); 687 688 dma_unmap_single(&adapter->pdev->dev, 689 fcoe->extra_ddp_buffer_dma, 690 IXGBE_FCBUFF_MIN, 691 DMA_FROM_DEVICE); 692 kfree(fcoe->extra_ddp_buffer); 693 694 fcoe->extra_ddp_buffer = NULL; 695 fcoe->extra_ddp_buffer_dma = 0; 696 } 697 698 /** 699 * ixgbe_setup_fcoe_ddp_resources - setup all fcoe ddp context resources 700 * @adapter: ixgbe adapter 701 * 702 * Sets up ddp context resouces 703 * 704 * Returns : 0 indicates success or -EINVAL on failure 705 */ 706 int ixgbe_setup_fcoe_ddp_resources(struct ixgbe_adapter *adapter) 707 { 708 struct ixgbe_fcoe *fcoe = &adapter->fcoe; 709 struct device *dev = &adapter->pdev->dev; 710 void *buffer; 711 dma_addr_t dma; 712 unsigned int cpu; 713 714 /* do nothing if no DDP pools were allocated */ 715 if (!fcoe->ddp_pool) 716 return 0; 717 718 /* Extra buffer to be shared by all DDPs for HW work around */ 719 buffer = kmalloc(IXGBE_FCBUFF_MIN, GFP_ATOMIC); 720 if (!buffer) 721 return -ENOMEM; 722 723 dma = dma_map_single(dev, buffer, IXGBE_FCBUFF_MIN, DMA_FROM_DEVICE); 724 if (dma_mapping_error(dev, dma)) { 725 e_err(drv, "failed to map extra DDP buffer\n"); 726 kfree(buffer); 727 return -ENOMEM; 728 } 729 730 fcoe->extra_ddp_buffer = buffer; 731 fcoe->extra_ddp_buffer_dma = dma; 732 733 /* allocate pci pool for each cpu */ 734 for_each_possible_cpu(cpu) { 735 int err = ixgbe_fcoe_dma_pool_alloc(fcoe, dev, cpu); 736 if (!err) 737 continue; 738 739 e_err(drv, "failed to alloc DDP pool on cpu:%d\n", cpu); 740 ixgbe_free_fcoe_ddp_resources(adapter); 741 return -ENOMEM; 742 } 743 744 return 0; 745 } 746 747 static int ixgbe_fcoe_ddp_enable(struct ixgbe_adapter *adapter) 748 { 749 struct ixgbe_fcoe *fcoe = &adapter->fcoe; 750 751 if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE)) 752 return -EINVAL; 753 754 fcoe->ddp_pool = alloc_percpu(struct ixgbe_fcoe_ddp_pool); 755 756 if (!fcoe->ddp_pool) { 757 e_err(drv, "failed to allocate percpu DDP resources\n"); 758 return -ENOMEM; 759 } 760 761 adapter->netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX - 1; 762 763 return 0; 764 } 765 766 static void ixgbe_fcoe_ddp_disable(struct ixgbe_adapter *adapter) 767 { 768 struct ixgbe_fcoe *fcoe = &adapter->fcoe; 769 770 adapter->netdev->fcoe_ddp_xid = 0; 771 772 if (!fcoe->ddp_pool) 773 return; 774 775 free_percpu(fcoe->ddp_pool); 776 fcoe->ddp_pool = NULL; 777 } 778 779 /** 780 * ixgbe_fcoe_enable - turn on FCoE offload feature 781 * @netdev: the corresponding netdev 782 * 783 * Turns on FCoE offload feature in 82599. 784 * 785 * Returns : 0 indicates success or -EINVAL on failure 786 */ 787 int ixgbe_fcoe_enable(struct net_device *netdev) 788 { 789 struct ixgbe_adapter *adapter = netdev_priv(netdev); 790 struct ixgbe_fcoe *fcoe = &adapter->fcoe; 791 792 atomic_inc(&fcoe->refcnt); 793 794 if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE)) 795 return -EINVAL; 796 797 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) 798 return -EINVAL; 799 800 e_info(drv, "Enabling FCoE offload features.\n"); 801 802 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) 803 e_warn(probe, "Enabling FCoE on PF will disable legacy VFs\n"); 804 805 if (netif_running(netdev)) 806 netdev->netdev_ops->ndo_stop(netdev); 807 808 /* Allocate per CPU memory to track DDP pools */ 809 ixgbe_fcoe_ddp_enable(adapter); 810 811 /* enable FCoE and notify stack */ 812 adapter->flags |= IXGBE_FLAG_FCOE_ENABLED; 813 netdev->features |= NETIF_F_FCOE_MTU; 814 netdev_features_change(netdev); 815 816 /* release existing queues and reallocate them */ 817 ixgbe_clear_interrupt_scheme(adapter); 818 ixgbe_init_interrupt_scheme(adapter); 819 820 if (netif_running(netdev)) 821 netdev->netdev_ops->ndo_open(netdev); 822 823 return 0; 824 } 825 826 /** 827 * ixgbe_fcoe_disable - turn off FCoE offload feature 828 * @netdev: the corresponding netdev 829 * 830 * Turns off FCoE offload feature in 82599. 831 * 832 * Returns : 0 indicates success or -EINVAL on failure 833 */ 834 int ixgbe_fcoe_disable(struct net_device *netdev) 835 { 836 struct ixgbe_adapter *adapter = netdev_priv(netdev); 837 838 if (!atomic_dec_and_test(&adapter->fcoe.refcnt)) 839 return -EINVAL; 840 841 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) 842 return -EINVAL; 843 844 e_info(drv, "Disabling FCoE offload features.\n"); 845 if (netif_running(netdev)) 846 netdev->netdev_ops->ndo_stop(netdev); 847 848 /* Free per CPU memory to track DDP pools */ 849 ixgbe_fcoe_ddp_disable(adapter); 850 851 /* disable FCoE and notify stack */ 852 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED; 853 netdev->features &= ~NETIF_F_FCOE_MTU; 854 855 netdev_features_change(netdev); 856 857 /* release existing queues and reallocate them */ 858 ixgbe_clear_interrupt_scheme(adapter); 859 ixgbe_init_interrupt_scheme(adapter); 860 861 if (netif_running(netdev)) 862 netdev->netdev_ops->ndo_open(netdev); 863 864 return 0; 865 } 866 867 /** 868 * ixgbe_fcoe_get_wwn - get world wide name for the node or the port 869 * @netdev : ixgbe adapter 870 * @wwn : the world wide name 871 * @type: the type of world wide name 872 * 873 * Returns the node or port world wide name if both the prefix and the san 874 * mac address are valid, then the wwn is formed based on the NAA-2 for 875 * IEEE Extended name identifier (ref. to T10 FC-LS Spec., Sec. 15.3). 876 * 877 * Returns : 0 on success 878 */ 879 int ixgbe_fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type) 880 { 881 int rc = -EINVAL; 882 u16 prefix = 0xffff; 883 struct ixgbe_adapter *adapter = netdev_priv(netdev); 884 struct ixgbe_mac_info *mac = &adapter->hw.mac; 885 886 switch (type) { 887 case NETDEV_FCOE_WWNN: 888 prefix = mac->wwnn_prefix; 889 break; 890 case NETDEV_FCOE_WWPN: 891 prefix = mac->wwpn_prefix; 892 break; 893 default: 894 break; 895 } 896 897 if ((prefix != 0xffff) && 898 is_valid_ether_addr(mac->san_addr)) { 899 *wwn = ((u64) prefix << 48) | 900 ((u64) mac->san_addr[0] << 40) | 901 ((u64) mac->san_addr[1] << 32) | 902 ((u64) mac->san_addr[2] << 24) | 903 ((u64) mac->san_addr[3] << 16) | 904 ((u64) mac->san_addr[4] << 8) | 905 ((u64) mac->san_addr[5]); 906 rc = 0; 907 } 908 return rc; 909 } 910 911 /** 912 * ixgbe_fcoe_get_hbainfo - get FCoE HBA information 913 * @netdev : ixgbe adapter 914 * @info : HBA information 915 * 916 * Returns ixgbe HBA information 917 * 918 * Returns : 0 on success 919 */ 920 int ixgbe_fcoe_get_hbainfo(struct net_device *netdev, 921 struct netdev_fcoe_hbainfo *info) 922 { 923 struct ixgbe_adapter *adapter = netdev_priv(netdev); 924 struct ixgbe_hw *hw = &adapter->hw; 925 int i, pos; 926 u8 buf[8]; 927 928 if (!info) 929 return -EINVAL; 930 931 /* Don't return information on unsupported devices */ 932 if (hw->mac.type != ixgbe_mac_82599EB && 933 hw->mac.type != ixgbe_mac_X540) 934 return -EINVAL; 935 936 /* Manufacturer */ 937 snprintf(info->manufacturer, sizeof(info->manufacturer), 938 "Intel Corporation"); 939 940 /* Serial Number */ 941 942 /* Get the PCI-e Device Serial Number Capability */ 943 pos = pci_find_ext_capability(adapter->pdev, PCI_EXT_CAP_ID_DSN); 944 if (pos) { 945 pos += 4; 946 for (i = 0; i < 8; i++) 947 pci_read_config_byte(adapter->pdev, pos + i, &buf[i]); 948 949 snprintf(info->serial_number, sizeof(info->serial_number), 950 "%02X%02X%02X%02X%02X%02X%02X%02X", 951 buf[7], buf[6], buf[5], buf[4], 952 buf[3], buf[2], buf[1], buf[0]); 953 } else 954 snprintf(info->serial_number, sizeof(info->serial_number), 955 "Unknown"); 956 957 /* Hardware Version */ 958 snprintf(info->hardware_version, 959 sizeof(info->hardware_version), 960 "Rev %d", hw->revision_id); 961 /* Driver Name/Version */ 962 snprintf(info->driver_version, 963 sizeof(info->driver_version), 964 "%s v%s", 965 ixgbe_driver_name, 966 ixgbe_driver_version); 967 /* Firmware Version */ 968 snprintf(info->firmware_version, 969 sizeof(info->firmware_version), 970 "0x%08x", 971 (adapter->eeprom_verh << 16) | 972 adapter->eeprom_verl); 973 974 /* Model */ 975 if (hw->mac.type == ixgbe_mac_82599EB) { 976 snprintf(info->model, 977 sizeof(info->model), 978 "Intel 82599"); 979 } else { 980 snprintf(info->model, 981 sizeof(info->model), 982 "Intel X540"); 983 } 984 985 /* Model Description */ 986 snprintf(info->model_description, 987 sizeof(info->model_description), 988 "%s", 989 ixgbe_default_device_descr); 990 991 return 0; 992 } 993 994 /** 995 * ixgbe_fcoe_get_tc - get the current TC that fcoe is mapped to 996 * @adapter - pointer to the device adapter structure 997 * 998 * Return : TC that FCoE is mapped to 999 */ 1000 u8 ixgbe_fcoe_get_tc(struct ixgbe_adapter *adapter) 1001 { 1002 #ifdef CONFIG_IXGBE_DCB 1003 return netdev_get_prio_tc_map(adapter->netdev, adapter->fcoe.up); 1004 #else 1005 return 0; 1006 #endif 1007 } 1008