// SPDX-License-Identifier: GPL-2.0 /* Copyright(c) 1999 - 2018 Intel Corporation. */ #include "ixgbe.h" #include #include #include #include #include #include #include #include #include /** * ixgbe_fcoe_clear_ddp - clear the given ddp context * @ddp: ptr to the ixgbe_fcoe_ddp * * Returns : none * */ static inline void ixgbe_fcoe_clear_ddp(struct ixgbe_fcoe_ddp *ddp) { ddp->len = 0; ddp->err = 1; ddp->udl = NULL; ddp->udp = 0UL; ddp->sgl = NULL; ddp->sgc = 0; } /** * ixgbe_fcoe_ddp_put - free the ddp context for a given xid * @netdev: the corresponding net_device * @xid: the xid that corresponding ddp will be freed * * This is the implementation of net_device_ops.ndo_fcoe_ddp_done * and it is expected to be called by ULD, i.e., FCP layer of libfc * to release the corresponding ddp context when the I/O is done. * * Returns : data length already ddp-ed in bytes */ int ixgbe_fcoe_ddp_put(struct net_device *netdev, u16 xid) { int len; struct ixgbe_fcoe *fcoe; struct ixgbe_adapter *adapter; struct ixgbe_fcoe_ddp *ddp; struct ixgbe_hw *hw; u32 fcbuff; if (!netdev) return 0; if (xid >= netdev->fcoe_ddp_xid) return 0; adapter = netdev_priv(netdev); fcoe = &adapter->fcoe; ddp = &fcoe->ddp[xid]; if (!ddp->udl) return 0; hw = &adapter->hw; len = ddp->len; /* if no error then skip ddp context invalidation */ if (!ddp->err) goto skip_ddpinv; if (hw->mac.type == ixgbe_mac_X550) { /* X550 does not require DDP FCoE lock */ IXGBE_WRITE_REG(hw, IXGBE_FCDFC(0, xid), 0); IXGBE_WRITE_REG(hw, IXGBE_FCDFC(3, xid), (xid | IXGBE_FCFLTRW_WE)); /* program FCBUFF */ IXGBE_WRITE_REG(hw, IXGBE_FCDDC(2, xid), 0); /* program FCDMARW */ IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid), (xid | IXGBE_FCDMARW_WE)); /* read FCBUFF to check context invalidated */ IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid), (xid | IXGBE_FCDMARW_RE)); fcbuff = IXGBE_READ_REG(hw, IXGBE_FCDDC(2, xid)); } else { /* other hardware requires DDP FCoE lock */ spin_lock_bh(&fcoe->lock); IXGBE_WRITE_REG(hw, IXGBE_FCFLT, 0); IXGBE_WRITE_REG(hw, IXGBE_FCFLTRW, (xid | IXGBE_FCFLTRW_WE)); IXGBE_WRITE_REG(hw, IXGBE_FCBUFF, 0); IXGBE_WRITE_REG(hw, IXGBE_FCDMARW, (xid | IXGBE_FCDMARW_WE)); /* guaranteed to be invalidated after 100us */ IXGBE_WRITE_REG(hw, IXGBE_FCDMARW, (xid | IXGBE_FCDMARW_RE)); fcbuff = IXGBE_READ_REG(hw, IXGBE_FCBUFF); spin_unlock_bh(&fcoe->lock); } if (fcbuff & IXGBE_FCBUFF_VALID) usleep_range(100, 150); skip_ddpinv: if (ddp->sgl) dma_unmap_sg(&adapter->pdev->dev, ddp->sgl, ddp->sgc, DMA_FROM_DEVICE); if (ddp->pool) { dma_pool_free(ddp->pool, ddp->udl, ddp->udp); ddp->pool = NULL; } ixgbe_fcoe_clear_ddp(ddp); return len; } /** * ixgbe_fcoe_ddp_setup - called to set up ddp context * @netdev: the corresponding net_device * @xid: the exchange id requesting ddp * @sgl: the scatter-gather list for this request * @sgc: the number of scatter-gather items * @target_mode: 1 to setup target mode, 0 to setup initiator mode * * Returns : 1 for success and 0 for no ddp */ static int ixgbe_fcoe_ddp_setup(struct net_device *netdev, u16 xid, struct scatterlist *sgl, unsigned int sgc, int target_mode) { struct ixgbe_adapter *adapter; struct ixgbe_hw *hw; struct ixgbe_fcoe *fcoe; struct ixgbe_fcoe_ddp *ddp; struct ixgbe_fcoe_ddp_pool *ddp_pool; struct scatterlist *sg; unsigned int i, j, dmacount; unsigned int len; static const unsigned int bufflen = IXGBE_FCBUFF_MIN; unsigned int firstoff = 0; unsigned int lastsize; unsigned int thisoff = 0; unsigned int thislen = 0; u32 fcbuff, fcdmarw, fcfltrw, fcrxctl; dma_addr_t addr = 0; if (!netdev || !sgl) return 0; adapter = netdev_priv(netdev); if (xid >= netdev->fcoe_ddp_xid) { e_warn(drv, "xid=0x%x out-of-range\n", xid); return 0; } /* no DDP if we are already down or resetting */ if (test_bit(__IXGBE_DOWN, &adapter->state) || test_bit(__IXGBE_RESETTING, &adapter->state)) return 0; fcoe = &adapter->fcoe; ddp = &fcoe->ddp[xid]; if (ddp->sgl) { e_err(drv, "xid 0x%x w/ non-null sgl=%p nents=%d\n", xid, ddp->sgl, ddp->sgc); return 0; } ixgbe_fcoe_clear_ddp(ddp); if (!fcoe->ddp_pool) { e_warn(drv, "No ddp_pool resources allocated\n"); return 0; } ddp_pool = per_cpu_ptr(fcoe->ddp_pool, get_cpu()); if (!ddp_pool->pool) { e_warn(drv, "xid=0x%x no ddp pool for fcoe\n", xid); goto out_noddp; } /* setup dma from scsi command sgl */ dmacount = dma_map_sg(&adapter->pdev->dev, sgl, sgc, DMA_FROM_DEVICE); if (dmacount == 0) { e_err(drv, "xid 0x%x DMA map error\n", xid); goto out_noddp; } /* alloc the udl from per cpu ddp pool */ ddp->udl = dma_pool_alloc(ddp_pool->pool, GFP_KERNEL, &ddp->udp); if (!ddp->udl) { e_err(drv, "failed allocated ddp context\n"); goto out_noddp_unmap; } ddp->pool = ddp_pool->pool; ddp->sgl = sgl; ddp->sgc = sgc; j = 0; for_each_sg(sgl, sg, dmacount, i) { addr = sg_dma_address(sg); len = sg_dma_len(sg); while (len) { /* max number of buffers allowed in one DDP context */ if (j >= IXGBE_BUFFCNT_MAX) { ddp_pool->noddp++; goto out_noddp_free; } /* get the offset of length of current buffer */ thisoff = addr & ((dma_addr_t)bufflen - 1); thislen = min((bufflen - thisoff), len); /* * all but the 1st buffer (j == 0) * must be aligned on bufflen */ if ((j != 0) && (thisoff)) goto out_noddp_free; /* * all but the last buffer * ((i == (dmacount - 1)) && (thislen == len)) * must end at bufflen */ if (((i != (dmacount - 1)) || (thislen != len)) && ((thislen + thisoff) != bufflen)) goto out_noddp_free; ddp->udl[j] = (u64)(addr - thisoff); /* only the first buffer may have none-zero offset */ if (j == 0) firstoff = thisoff; len -= thislen; addr += thislen; j++; } } /* only the last buffer may have non-full bufflen */ lastsize = thisoff + thislen; /* * lastsize can not be buffer len. * If it is then adding another buffer with lastsize = 1. */ if (lastsize == bufflen) { if (j >= IXGBE_BUFFCNT_MAX) { ddp_pool->noddp_ext_buff++; goto out_noddp_free; } ddp->udl[j] = (u64)(fcoe->extra_ddp_buffer_dma); j++; lastsize = 1; } put_cpu(); fcbuff = (IXGBE_FCBUFF_4KB << IXGBE_FCBUFF_BUFFSIZE_SHIFT); fcbuff |= ((j & 0xff) << IXGBE_FCBUFF_BUFFCNT_SHIFT); fcbuff |= (firstoff << IXGBE_FCBUFF_OFFSET_SHIFT); /* Set WRCONTX bit to allow DDP for target */ if (target_mode) fcbuff |= (IXGBE_FCBUFF_WRCONTX); fcbuff |= (IXGBE_FCBUFF_VALID); fcdmarw = xid; fcdmarw |= IXGBE_FCDMARW_WE; fcdmarw |= (lastsize << IXGBE_FCDMARW_LASTSIZE_SHIFT); fcfltrw = xid; fcfltrw |= IXGBE_FCFLTRW_WE; /* program DMA context */ hw = &adapter->hw; /* turn on last frame indication for target mode as FCP_RSPtarget is * supposed to send FCP_RSP when it is done. */ if (target_mode && !test_bit(__IXGBE_FCOE_TARGET, &fcoe->mode)) { set_bit(__IXGBE_FCOE_TARGET, &fcoe->mode); fcrxctl = IXGBE_READ_REG(hw, IXGBE_FCRXCTRL); fcrxctl |= IXGBE_FCRXCTRL_LASTSEQH; IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL, fcrxctl); } if (hw->mac.type == ixgbe_mac_X550) { /* X550 does not require DDP lock */ IXGBE_WRITE_REG(hw, IXGBE_FCDDC(0, xid), ddp->udp & DMA_BIT_MASK(32)); IXGBE_WRITE_REG(hw, IXGBE_FCDDC(1, xid), (u64)ddp->udp >> 32); IXGBE_WRITE_REG(hw, IXGBE_FCDDC(2, xid), fcbuff); IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid), fcdmarw); /* program filter context */ IXGBE_WRITE_REG(hw, IXGBE_FCDFC(0, xid), IXGBE_FCFLT_VALID); IXGBE_WRITE_REG(hw, IXGBE_FCDFC(1, xid), 0); IXGBE_WRITE_REG(hw, IXGBE_FCDFC(3, xid), fcfltrw); } else { /* DDP lock for indirect DDP context access */ spin_lock_bh(&fcoe->lock); IXGBE_WRITE_REG(hw, IXGBE_FCPTRL, ddp->udp & DMA_BIT_MASK(32)); IXGBE_WRITE_REG(hw, IXGBE_FCPTRH, (u64)ddp->udp >> 32); IXGBE_WRITE_REG(hw, IXGBE_FCBUFF, fcbuff); IXGBE_WRITE_REG(hw, IXGBE_FCDMARW, fcdmarw); /* program filter context */ IXGBE_WRITE_REG(hw, IXGBE_FCPARAM, 0); IXGBE_WRITE_REG(hw, IXGBE_FCFLT, IXGBE_FCFLT_VALID); IXGBE_WRITE_REG(hw, IXGBE_FCFLTRW, fcfltrw); spin_unlock_bh(&fcoe->lock); } return 1; out_noddp_free: dma_pool_free(ddp->pool, ddp->udl, ddp->udp); ixgbe_fcoe_clear_ddp(ddp); out_noddp_unmap: dma_unmap_sg(&adapter->pdev->dev, sgl, sgc, DMA_FROM_DEVICE); out_noddp: put_cpu(); return 0; } /** * ixgbe_fcoe_ddp_get - called to set up ddp context in initiator mode * @netdev: the corresponding net_device * @xid: the exchange id requesting ddp * @sgl: the scatter-gather list for this request * @sgc: the number of scatter-gather items * * This is the implementation of net_device_ops.ndo_fcoe_ddp_setup * and is expected to be called from ULD, e.g., FCP layer of libfc * to set up ddp for the corresponding xid of the given sglist for * the corresponding I/O. * * Returns : 1 for success and 0 for no ddp */ int ixgbe_fcoe_ddp_get(struct net_device *netdev, u16 xid, struct scatterlist *sgl, unsigned int sgc) { return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 0); } /** * ixgbe_fcoe_ddp_target - called to set up ddp context in target mode * @netdev: the corresponding net_device * @xid: the exchange id requesting ddp * @sgl: the scatter-gather list for this request * @sgc: the number of scatter-gather items * * This is the implementation of net_device_ops.ndo_fcoe_ddp_target * and is expected to be called from ULD, e.g., FCP layer of libfc * to set up ddp for the corresponding xid of the given sglist for * the corresponding I/O. The DDP in target mode is a write I/O request * from the initiator. * * Returns : 1 for success and 0 for no ddp */ int ixgbe_fcoe_ddp_target(struct net_device *netdev, u16 xid, struct scatterlist *sgl, unsigned int sgc) { return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 1); } /** * ixgbe_fcoe_ddp - check ddp status and mark it done * @adapter: ixgbe adapter * @rx_desc: advanced rx descriptor * @skb: the skb holding the received data * * This checks ddp status. * * Returns : < 0 indicates an error or not a FCiE ddp, 0 indicates * not passing the skb to ULD, > 0 indicates is the length of data * being ddped. */ int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter, union ixgbe_adv_rx_desc *rx_desc, struct sk_buff *skb) { int rc = -EINVAL; struct ixgbe_fcoe *fcoe; struct ixgbe_fcoe_ddp *ddp; struct fc_frame_header *fh; struct fcoe_crc_eof *crc; __le32 fcerr = ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_FCERR); __le32 ddp_err; int ddp_max; u32 fctl; u16 xid; if (fcerr == cpu_to_le32(IXGBE_FCERR_BADCRC)) skb->ip_summed = CHECKSUM_NONE; else skb->ip_summed = CHECKSUM_UNNECESSARY; if (eth_hdr(skb)->h_proto == htons(ETH_P_8021Q)) fh = (struct fc_frame_header *)(skb->data + sizeof(struct vlan_hdr) + sizeof(struct fcoe_hdr)); else fh = (struct fc_frame_header *)(skb->data + sizeof(struct fcoe_hdr)); fctl = ntoh24(fh->fh_f_ctl); if (fctl & FC_FC_EX_CTX) xid = be16_to_cpu(fh->fh_ox_id); else xid = be16_to_cpu(fh->fh_rx_id); ddp_max = IXGBE_FCOE_DDP_MAX; /* X550 has different DDP Max limit */ if (adapter->hw.mac.type == ixgbe_mac_X550) ddp_max = IXGBE_FCOE_DDP_MAX_X550; if (xid >= ddp_max) return -EINVAL; fcoe = &adapter->fcoe; ddp = &fcoe->ddp[xid]; if (!ddp->udl) return -EINVAL; ddp_err = ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_FCEOFE | IXGBE_RXDADV_ERR_FCERR); if (ddp_err) return -EINVAL; switch (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_STAT_FCSTAT)) { /* return 0 to bypass going to ULD for DDPed data */ case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_DDP): /* update length of DDPed data */ ddp->len = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss); rc = 0; break; /* unmap the sg list when FCPRSP is received */ case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_FCPRSP): dma_unmap_sg(&adapter->pdev->dev, ddp->sgl, ddp->sgc, DMA_FROM_DEVICE); ddp->err = (__force u32)ddp_err; ddp->sgl = NULL; ddp->sgc = 0; /* fall through */ /* if DDP length is present pass it through to ULD */ case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_NODDP): /* update length of DDPed data */ ddp->len = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss); if (ddp->len) rc = ddp->len; break; /* no match will return as an error */ case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_NOMTCH): default: break; } /* In target mode, check the last data frame of the sequence. * For DDP in target mode, data is already DDPed but the header * indication of the last data frame ould allow is to tell if we * got all the data and the ULP can send FCP_RSP back, as this is * not a full fcoe frame, we fill the trailer here so it won't be * dropped by the ULP stack. */ if ((fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA) && (fctl & FC_FC_END_SEQ)) { skb_linearize(skb); crc = skb_put(skb, sizeof(*crc)); crc->fcoe_eof = FC_EOF_T; } return rc; } /** * ixgbe_fso - ixgbe FCoE Sequence Offload (FSO) * @tx_ring: tx desc ring * @first: first tx_buffer structure containing skb, tx_flags, and protocol * @hdr_len: hdr_len to be returned * * This sets up large send offload for FCoE * * Returns : 0 indicates success, < 0 for error */ int ixgbe_fso(struct ixgbe_ring *tx_ring, struct ixgbe_tx_buffer *first, u8 *hdr_len) { struct sk_buff *skb = first->skb; struct fc_frame_header *fh; u32 vlan_macip_lens; u32 fcoe_sof_eof = 0; u32 mss_l4len_idx; u32 type_tucmd = IXGBE_ADVTXT_TUCMD_FCOE; u8 sof, eof; if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_type != SKB_GSO_FCOE)) { dev_err(tx_ring->dev, "Wrong gso type %d:expecting SKB_GSO_FCOE\n", skb_shinfo(skb)->gso_type); return -EINVAL; } /* resets the header to point fcoe/fc */ skb_set_network_header(skb, skb->mac_len); skb_set_transport_header(skb, skb->mac_len + sizeof(struct fcoe_hdr)); /* sets up SOF and ORIS */ sof = ((struct fcoe_hdr *)skb_network_header(skb))->fcoe_sof; switch (sof) { case FC_SOF_I2: fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_ORIS; break; case FC_SOF_I3: fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_SOF | IXGBE_ADVTXD_FCOEF_ORIS; break; case FC_SOF_N2: break; case FC_SOF_N3: fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_SOF; break; default: dev_warn(tx_ring->dev, "unknown sof = 0x%x\n", sof); return -EINVAL; } /* the first byte of the last dword is EOF */ skb_copy_bits(skb, skb->len - 4, &eof, 1); /* sets up EOF and ORIE */ switch (eof) { case FC_EOF_N: fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N; break; case FC_EOF_T: /* lso needs ORIE */ if (skb_is_gso(skb)) fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N | IXGBE_ADVTXD_FCOEF_ORIE; else fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_T; break; case FC_EOF_NI: fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_NI; break; case FC_EOF_A: fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_A; break; default: dev_warn(tx_ring->dev, "unknown eof = 0x%x\n", eof); return -EINVAL; } /* sets up PARINC indicating data offset */ fh = (struct fc_frame_header *)skb_transport_header(skb); if (fh->fh_f_ctl[2] & FC_FC_REL_OFF) fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_PARINC; /* include trailer in headlen as it is replicated per frame */ *hdr_len = sizeof(struct fcoe_crc_eof); /* hdr_len includes fc_hdr if FCoE LSO is enabled */ if (skb_is_gso(skb)) { *hdr_len += skb_transport_offset(skb) + sizeof(struct fc_frame_header); /* update gso_segs and bytecount */ first->gso_segs = DIV_ROUND_UP(skb->len - *hdr_len, skb_shinfo(skb)->gso_size); first->bytecount += (first->gso_segs - 1) * *hdr_len; first->tx_flags |= IXGBE_TX_FLAGS_TSO; /* Hardware expects L4T to be RSV for FCoE TSO */ type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_RSV; } /* set flag indicating FCOE to ixgbe_tx_map call */ first->tx_flags |= IXGBE_TX_FLAGS_FCOE | IXGBE_TX_FLAGS_CC; /* mss_l4len_id: use 0 for FSO as TSO, no need for L4LEN */ mss_l4len_idx = skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT; /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */ vlan_macip_lens = skb_transport_offset(skb) + sizeof(struct fc_frame_header); vlan_macip_lens |= (skb_transport_offset(skb) - 4) << IXGBE_ADVTXD_MACLEN_SHIFT; vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK; /* write context desc */ ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, fcoe_sof_eof, type_tucmd, mss_l4len_idx); return 0; } static void ixgbe_fcoe_dma_pool_free(struct ixgbe_fcoe *fcoe, unsigned int cpu) { struct ixgbe_fcoe_ddp_pool *ddp_pool; ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu); dma_pool_destroy(ddp_pool->pool); ddp_pool->pool = NULL; } static int ixgbe_fcoe_dma_pool_alloc(struct ixgbe_fcoe *fcoe, struct device *dev, unsigned int cpu) { struct ixgbe_fcoe_ddp_pool *ddp_pool; struct dma_pool *pool; char pool_name[32]; snprintf(pool_name, 32, "ixgbe_fcoe_ddp_%u", cpu); pool = dma_pool_create(pool_name, dev, IXGBE_FCPTR_MAX, IXGBE_FCPTR_ALIGN, PAGE_SIZE); if (!pool) return -ENOMEM; ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu); ddp_pool->pool = pool; ddp_pool->noddp = 0; ddp_pool->noddp_ext_buff = 0; return 0; } /** * ixgbe_configure_fcoe - configures registers for fcoe at start * @adapter: ptr to ixgbe adapter * * This sets up FCoE related registers * * Returns : none */ void ixgbe_configure_fcoe(struct ixgbe_adapter *adapter) { struct ixgbe_ring_feature *fcoe = &adapter->ring_feature[RING_F_FCOE]; struct ixgbe_hw *hw = &adapter->hw; int i, fcoe_q, fcoe_i, fcoe_q_h = 0; int fcreta_size; u32 etqf; /* Minimal functionality for FCoE requires at least CRC offloads */ if (!(adapter->netdev->features & NETIF_F_FCOE_CRC)) return; /* Enable L2 EtherType filter for FCoE, needed for FCoE CRC and DDP */ etqf = ETH_P_FCOE | IXGBE_ETQF_FCOE | IXGBE_ETQF_FILTER_EN; if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) { etqf |= IXGBE_ETQF_POOL_ENABLE; etqf |= VMDQ_P(0) << IXGBE_ETQF_POOL_SHIFT; } IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FCOE), etqf); IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FCOE), 0); /* leave registers un-configured if FCoE is disabled */ if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) return; /* Use one or more Rx queues for FCoE by redirection table */ fcreta_size = IXGBE_FCRETA_SIZE; if (adapter->hw.mac.type == ixgbe_mac_X550) fcreta_size = IXGBE_FCRETA_SIZE_X550; for (i = 0; i < fcreta_size; i++) { if (adapter->hw.mac.type == ixgbe_mac_X550) { int fcoe_i_h = fcoe->offset + ((i + fcreta_size) % fcoe->indices); fcoe_q_h = adapter->rx_ring[fcoe_i_h]->reg_idx; fcoe_q_h = (fcoe_q_h << IXGBE_FCRETA_ENTRY_HIGH_SHIFT) & IXGBE_FCRETA_ENTRY_HIGH_MASK; } fcoe_i = fcoe->offset + (i % fcoe->indices); fcoe_i &= IXGBE_FCRETA_ENTRY_MASK; fcoe_q = adapter->rx_ring[fcoe_i]->reg_idx; fcoe_q |= fcoe_q_h; IXGBE_WRITE_REG(hw, IXGBE_FCRETA(i), fcoe_q); } IXGBE_WRITE_REG(hw, IXGBE_FCRECTL, IXGBE_FCRECTL_ENA); /* Enable L2 EtherType filter for FIP */ etqf = ETH_P_FIP | IXGBE_ETQF_FILTER_EN; if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) { etqf |= IXGBE_ETQF_POOL_ENABLE; etqf |= VMDQ_P(0) << IXGBE_ETQF_POOL_SHIFT; } IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FIP), etqf); /* Send FIP frames to the first FCoE queue */ fcoe_q = adapter->rx_ring[fcoe->offset]->reg_idx; IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FIP), IXGBE_ETQS_QUEUE_EN | (fcoe_q << IXGBE_ETQS_RX_QUEUE_SHIFT)); /* Configure FCoE Rx control */ IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL, IXGBE_FCRXCTRL_FCCRCBO | (FC_FCOE_VER << IXGBE_FCRXCTRL_FCOEVER_SHIFT)); } /** * ixgbe_free_fcoe_ddp_resources - release all fcoe ddp context resources * @adapter : ixgbe adapter * * Cleans up outstanding ddp context resources * * Returns : none */ void ixgbe_free_fcoe_ddp_resources(struct ixgbe_adapter *adapter) { struct ixgbe_fcoe *fcoe = &adapter->fcoe; int cpu, i, ddp_max; /* do nothing if no DDP pools were allocated */ if (!fcoe->ddp_pool) return; ddp_max = IXGBE_FCOE_DDP_MAX; /* X550 has different DDP Max limit */ if (adapter->hw.mac.type == ixgbe_mac_X550) ddp_max = IXGBE_FCOE_DDP_MAX_X550; for (i = 0; i < ddp_max; i++) ixgbe_fcoe_ddp_put(adapter->netdev, i); for_each_possible_cpu(cpu) ixgbe_fcoe_dma_pool_free(fcoe, cpu); dma_unmap_single(&adapter->pdev->dev, fcoe->extra_ddp_buffer_dma, IXGBE_FCBUFF_MIN, DMA_FROM_DEVICE); kfree(fcoe->extra_ddp_buffer); fcoe->extra_ddp_buffer = NULL; fcoe->extra_ddp_buffer_dma = 0; } /** * ixgbe_setup_fcoe_ddp_resources - setup all fcoe ddp context resources * @adapter: ixgbe adapter * * Sets up ddp context resouces * * Returns : 0 indicates success or -EINVAL on failure */ int ixgbe_setup_fcoe_ddp_resources(struct ixgbe_adapter *adapter) { struct ixgbe_fcoe *fcoe = &adapter->fcoe; struct device *dev = &adapter->pdev->dev; void *buffer; dma_addr_t dma; unsigned int cpu; /* do nothing if no DDP pools were allocated */ if (!fcoe->ddp_pool) return 0; /* Extra buffer to be shared by all DDPs for HW work around */ buffer = kmalloc(IXGBE_FCBUFF_MIN, GFP_KERNEL); if (!buffer) return -ENOMEM; dma = dma_map_single(dev, buffer, IXGBE_FCBUFF_MIN, DMA_FROM_DEVICE); if (dma_mapping_error(dev, dma)) { e_err(drv, "failed to map extra DDP buffer\n"); kfree(buffer); return -ENOMEM; } fcoe->extra_ddp_buffer = buffer; fcoe->extra_ddp_buffer_dma = dma; /* allocate pci pool for each cpu */ for_each_possible_cpu(cpu) { int err = ixgbe_fcoe_dma_pool_alloc(fcoe, dev, cpu); if (!err) continue; e_err(drv, "failed to alloc DDP pool on cpu:%d\n", cpu); ixgbe_free_fcoe_ddp_resources(adapter); return -ENOMEM; } return 0; } static int ixgbe_fcoe_ddp_enable(struct ixgbe_adapter *adapter) { struct ixgbe_fcoe *fcoe = &adapter->fcoe; if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE)) return -EINVAL; fcoe->ddp_pool = alloc_percpu(struct ixgbe_fcoe_ddp_pool); if (!fcoe->ddp_pool) { e_err(drv, "failed to allocate percpu DDP resources\n"); return -ENOMEM; } adapter->netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX - 1; /* X550 has different DDP Max limit */ if (adapter->hw.mac.type == ixgbe_mac_X550) adapter->netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX_X550 - 1; return 0; } static void ixgbe_fcoe_ddp_disable(struct ixgbe_adapter *adapter) { struct ixgbe_fcoe *fcoe = &adapter->fcoe; adapter->netdev->fcoe_ddp_xid = 0; if (!fcoe->ddp_pool) return; free_percpu(fcoe->ddp_pool); fcoe->ddp_pool = NULL; } /** * ixgbe_fcoe_enable - turn on FCoE offload feature * @netdev: the corresponding netdev * * Turns on FCoE offload feature in 82599. * * Returns : 0 indicates success or -EINVAL on failure */ int ixgbe_fcoe_enable(struct net_device *netdev) { struct ixgbe_adapter *adapter = netdev_priv(netdev); struct ixgbe_fcoe *fcoe = &adapter->fcoe; atomic_inc(&fcoe->refcnt); if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE)) return -EINVAL; if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) return -EINVAL; e_info(drv, "Enabling FCoE offload features.\n"); if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) e_warn(probe, "Enabling FCoE on PF will disable legacy VFs\n"); if (netif_running(netdev)) netdev->netdev_ops->ndo_stop(netdev); /* Allocate per CPU memory to track DDP pools */ ixgbe_fcoe_ddp_enable(adapter); /* enable FCoE and notify stack */ adapter->flags |= IXGBE_FLAG_FCOE_ENABLED; netdev->features |= NETIF_F_FCOE_MTU; netdev_features_change(netdev); /* release existing queues and reallocate them */ ixgbe_clear_interrupt_scheme(adapter); ixgbe_init_interrupt_scheme(adapter); if (netif_running(netdev)) netdev->netdev_ops->ndo_open(netdev); return 0; } /** * ixgbe_fcoe_disable - turn off FCoE offload feature * @netdev: the corresponding netdev * * Turns off FCoE offload feature in 82599. * * Returns : 0 indicates success or -EINVAL on failure */ int ixgbe_fcoe_disable(struct net_device *netdev) { struct ixgbe_adapter *adapter = netdev_priv(netdev); if (!atomic_dec_and_test(&adapter->fcoe.refcnt)) return -EINVAL; if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) return -EINVAL; e_info(drv, "Disabling FCoE offload features.\n"); if (netif_running(netdev)) netdev->netdev_ops->ndo_stop(netdev); /* Free per CPU memory to track DDP pools */ ixgbe_fcoe_ddp_disable(adapter); /* disable FCoE and notify stack */ adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED; netdev->features &= ~NETIF_F_FCOE_MTU; netdev_features_change(netdev); /* release existing queues and reallocate them */ ixgbe_clear_interrupt_scheme(adapter); ixgbe_init_interrupt_scheme(adapter); if (netif_running(netdev)) netdev->netdev_ops->ndo_open(netdev); return 0; } /** * ixgbe_fcoe_get_wwn - get world wide name for the node or the port * @netdev : ixgbe adapter * @wwn : the world wide name * @type: the type of world wide name * * Returns the node or port world wide name if both the prefix and the san * mac address are valid, then the wwn is formed based on the NAA-2 for * IEEE Extended name identifier (ref. to T10 FC-LS Spec., Sec. 15.3). * * Returns : 0 on success */ int ixgbe_fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type) { u16 prefix = 0xffff; struct ixgbe_adapter *adapter = netdev_priv(netdev); struct ixgbe_mac_info *mac = &adapter->hw.mac; switch (type) { case NETDEV_FCOE_WWNN: prefix = mac->wwnn_prefix; break; case NETDEV_FCOE_WWPN: prefix = mac->wwpn_prefix; break; default: break; } if ((prefix != 0xffff) && is_valid_ether_addr(mac->san_addr)) { *wwn = ((u64) prefix << 48) | ((u64) mac->san_addr[0] << 40) | ((u64) mac->san_addr[1] << 32) | ((u64) mac->san_addr[2] << 24) | ((u64) mac->san_addr[3] << 16) | ((u64) mac->san_addr[4] << 8) | ((u64) mac->san_addr[5]); return 0; } return -EINVAL; } /** * ixgbe_fcoe_get_hbainfo - get FCoE HBA information * @netdev : ixgbe adapter * @info : HBA information * * Returns ixgbe HBA information * * Returns : 0 on success */ int ixgbe_fcoe_get_hbainfo(struct net_device *netdev, struct netdev_fcoe_hbainfo *info) { struct ixgbe_adapter *adapter = netdev_priv(netdev); struct ixgbe_hw *hw = &adapter->hw; int i, pos; u8 buf[8]; if (!info) return -EINVAL; /* Don't return information on unsupported devices */ if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) return -EINVAL; /* Manufacturer */ snprintf(info->manufacturer, sizeof(info->manufacturer), "Intel Corporation"); /* Serial Number */ /* Get the PCI-e Device Serial Number Capability */ pos = pci_find_ext_capability(adapter->pdev, PCI_EXT_CAP_ID_DSN); if (pos) { pos += 4; for (i = 0; i < 8; i++) pci_read_config_byte(adapter->pdev, pos + i, &buf[i]); snprintf(info->serial_number, sizeof(info->serial_number), "%02X%02X%02X%02X%02X%02X%02X%02X", buf[7], buf[6], buf[5], buf[4], buf[3], buf[2], buf[1], buf[0]); } else snprintf(info->serial_number, sizeof(info->serial_number), "Unknown"); /* Hardware Version */ snprintf(info->hardware_version, sizeof(info->hardware_version), "Rev %d", hw->revision_id); /* Driver Name/Version */ snprintf(info->driver_version, sizeof(info->driver_version), "%s v%s", ixgbe_driver_name, ixgbe_driver_version); /* Firmware Version */ strlcpy(info->firmware_version, adapter->eeprom_id, sizeof(info->firmware_version)); /* Model */ if (hw->mac.type == ixgbe_mac_82599EB) { snprintf(info->model, sizeof(info->model), "Intel 82599"); } else if (hw->mac.type == ixgbe_mac_X550) { snprintf(info->model, sizeof(info->model), "Intel X550"); } else { snprintf(info->model, sizeof(info->model), "Intel X540"); } /* Model Description */ snprintf(info->model_description, sizeof(info->model_description), "%s", ixgbe_default_device_descr); return 0; } /** * ixgbe_fcoe_get_tc - get the current TC that fcoe is mapped to * @adapter: pointer to the device adapter structure * * Return : TC that FCoE is mapped to */ u8 ixgbe_fcoe_get_tc(struct ixgbe_adapter *adapter) { #ifdef CONFIG_IXGBE_DCB return netdev_get_prio_tc_map(adapter->netdev, adapter->fcoe.up); #else return 0; #endif }