| /* bnx2x_cmn.c: Broadcom Everest network driver. |
| * |
| * Copyright (c) 2007-2010 Broadcom Corporation |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation. |
| * |
| * Maintained by: Eilon Greenstein <eilong@broadcom.com> |
| * Written by: Eliezer Tamir |
| * Based on code from Michael Chan's bnx2 driver |
| * UDP CSUM errata workaround by Arik Gendelman |
| * Slowpath and fastpath rework by Vladislav Zolotarov |
| * Statistics and Link management by Yitchak Gertner |
| * |
| */ |
| |
| |
| #include <linux/etherdevice.h> |
| #include <linux/ip.h> |
| #include <linux/ipv6.h> |
| #include <net/ip6_checksum.h> |
| #include <linux/firmware.h> |
| #include "bnx2x_cmn.h" |
| |
| #ifdef BCM_VLAN |
| #include <linux/if_vlan.h> |
| #endif |
| |
| static int bnx2x_poll(struct napi_struct *napi, int budget); |
| |
| /* free skb in the packet ring at pos idx |
| * return idx of last bd freed |
| */ |
| static u16 bnx2x_free_tx_pkt(struct bnx2x *bp, struct bnx2x_fastpath *fp, |
| u16 idx) |
| { |
| struct sw_tx_bd *tx_buf = &fp->tx_buf_ring[idx]; |
| struct eth_tx_start_bd *tx_start_bd; |
| struct eth_tx_bd *tx_data_bd; |
| struct sk_buff *skb = tx_buf->skb; |
| u16 bd_idx = TX_BD(tx_buf->first_bd), new_cons; |
| int nbd; |
| |
| /* prefetch skb end pointer to speedup dev_kfree_skb() */ |
| prefetch(&skb->end); |
| |
| DP(BNX2X_MSG_OFF, "pkt_idx %d buff @(%p)->skb %p\n", |
| idx, tx_buf, skb); |
| |
| /* unmap first bd */ |
| DP(BNX2X_MSG_OFF, "free bd_idx %d\n", bd_idx); |
| tx_start_bd = &fp->tx_desc_ring[bd_idx].start_bd; |
| dma_unmap_single(&bp->pdev->dev, BD_UNMAP_ADDR(tx_start_bd), |
| BD_UNMAP_LEN(tx_start_bd), PCI_DMA_TODEVICE); |
| |
| nbd = le16_to_cpu(tx_start_bd->nbd) - 1; |
| #ifdef BNX2X_STOP_ON_ERROR |
| if ((nbd - 1) > (MAX_SKB_FRAGS + 2)) { |
| BNX2X_ERR("BAD nbd!\n"); |
| bnx2x_panic(); |
| } |
| #endif |
| new_cons = nbd + tx_buf->first_bd; |
| |
| /* Get the next bd */ |
| bd_idx = TX_BD(NEXT_TX_IDX(bd_idx)); |
| |
| /* Skip a parse bd... */ |
| --nbd; |
| bd_idx = TX_BD(NEXT_TX_IDX(bd_idx)); |
| |
| /* ...and the TSO split header bd since they have no mapping */ |
| if (tx_buf->flags & BNX2X_TSO_SPLIT_BD) { |
| --nbd; |
| bd_idx = TX_BD(NEXT_TX_IDX(bd_idx)); |
| } |
| |
| /* now free frags */ |
| while (nbd > 0) { |
| |
| DP(BNX2X_MSG_OFF, "free frag bd_idx %d\n", bd_idx); |
| tx_data_bd = &fp->tx_desc_ring[bd_idx].reg_bd; |
| dma_unmap_page(&bp->pdev->dev, BD_UNMAP_ADDR(tx_data_bd), |
| BD_UNMAP_LEN(tx_data_bd), DMA_TO_DEVICE); |
| if (--nbd) |
| bd_idx = TX_BD(NEXT_TX_IDX(bd_idx)); |
| } |
| |
| /* release skb */ |
| WARN_ON(!skb); |
| dev_kfree_skb(skb); |
| tx_buf->first_bd = 0; |
| tx_buf->skb = NULL; |
| |
| return new_cons; |
| } |
| |
| int bnx2x_tx_int(struct bnx2x_fastpath *fp) |
| { |
| struct bnx2x *bp = fp->bp; |
| struct netdev_queue *txq; |
| u16 hw_cons, sw_cons, bd_cons = fp->tx_bd_cons; |
| |
| #ifdef BNX2X_STOP_ON_ERROR |
| if (unlikely(bp->panic)) |
| return -1; |
| #endif |
| |
| txq = netdev_get_tx_queue(bp->dev, fp->index); |
| hw_cons = le16_to_cpu(*fp->tx_cons_sb); |
| sw_cons = fp->tx_pkt_cons; |
| |
| while (sw_cons != hw_cons) { |
| u16 pkt_cons; |
| |
| pkt_cons = TX_BD(sw_cons); |
| |
| /* prefetch(bp->tx_buf_ring[pkt_cons].skb); */ |
| |
| DP(NETIF_MSG_TX_DONE, "hw_cons %u sw_cons %u pkt_cons %u\n", |
| hw_cons, sw_cons, pkt_cons); |
| |
| /* if (NEXT_TX_IDX(sw_cons) != hw_cons) { |
| rmb(); |
| prefetch(fp->tx_buf_ring[NEXT_TX_IDX(sw_cons)].skb); |
| } |
| */ |
| bd_cons = bnx2x_free_tx_pkt(bp, fp, pkt_cons); |
| sw_cons++; |
| } |
| |
| fp->tx_pkt_cons = sw_cons; |
| fp->tx_bd_cons = bd_cons; |
| |
| /* Need to make the tx_bd_cons update visible to start_xmit() |
| * before checking for netif_tx_queue_stopped(). Without the |
| * memory barrier, there is a small possibility that |
| * start_xmit() will miss it and cause the queue to be stopped |
| * forever. |
| */ |
| smp_mb(); |
| |
| /* TBD need a thresh? */ |
| if (unlikely(netif_tx_queue_stopped(txq))) { |
| /* Taking tx_lock() is needed to prevent reenabling the queue |
| * while it's empty. This could have happen if rx_action() gets |
| * suspended in bnx2x_tx_int() after the condition before |
| * netif_tx_wake_queue(), while tx_action (bnx2x_start_xmit()): |
| * |
| * stops the queue->sees fresh tx_bd_cons->releases the queue-> |
| * sends some packets consuming the whole queue again-> |
| * stops the queue |
| */ |
| |
| __netif_tx_lock(txq, smp_processor_id()); |
| |
| if ((netif_tx_queue_stopped(txq)) && |
| (bp->state == BNX2X_STATE_OPEN) && |
| (bnx2x_tx_avail(fp) >= MAX_SKB_FRAGS + 3)) |
| netif_tx_wake_queue(txq); |
| |
| __netif_tx_unlock(txq); |
| } |
| return 0; |
| } |
| |
| static inline void bnx2x_update_last_max_sge(struct bnx2x_fastpath *fp, |
| u16 idx) |
| { |
| u16 last_max = fp->last_max_sge; |
| |
| if (SUB_S16(idx, last_max) > 0) |
| fp->last_max_sge = idx; |
| } |
| |
| static void bnx2x_update_sge_prod(struct bnx2x_fastpath *fp, |
| struct eth_fast_path_rx_cqe *fp_cqe) |
| { |
| struct bnx2x *bp = fp->bp; |
| u16 sge_len = SGE_PAGE_ALIGN(le16_to_cpu(fp_cqe->pkt_len) - |
| le16_to_cpu(fp_cqe->len_on_bd)) >> |
| SGE_PAGE_SHIFT; |
| u16 last_max, last_elem, first_elem; |
| u16 delta = 0; |
| u16 i; |
| |
| if (!sge_len) |
| return; |
| |
| /* First mark all used pages */ |
| for (i = 0; i < sge_len; i++) |
| SGE_MASK_CLEAR_BIT(fp, RX_SGE(le16_to_cpu(fp_cqe->sgl[i]))); |
| |
| DP(NETIF_MSG_RX_STATUS, "fp_cqe->sgl[%d] = %d\n", |
| sge_len - 1, le16_to_cpu(fp_cqe->sgl[sge_len - 1])); |
| |
| /* Here we assume that the last SGE index is the biggest */ |
| prefetch((void *)(fp->sge_mask)); |
| bnx2x_update_last_max_sge(fp, le16_to_cpu(fp_cqe->sgl[sge_len - 1])); |
| |
| last_max = RX_SGE(fp->last_max_sge); |
| last_elem = last_max >> RX_SGE_MASK_ELEM_SHIFT; |
| first_elem = RX_SGE(fp->rx_sge_prod) >> RX_SGE_MASK_ELEM_SHIFT; |
| |
| /* If ring is not full */ |
| if (last_elem + 1 != first_elem) |
| last_elem++; |
| |
| /* Now update the prod */ |
| for (i = first_elem; i != last_elem; i = NEXT_SGE_MASK_ELEM(i)) { |
| if (likely(fp->sge_mask[i])) |
| break; |
| |
| fp->sge_mask[i] = RX_SGE_MASK_ELEM_ONE_MASK; |
| delta += RX_SGE_MASK_ELEM_SZ; |
| } |
| |
| if (delta > 0) { |
| fp->rx_sge_prod += delta; |
| /* clear page-end entries */ |
| bnx2x_clear_sge_mask_next_elems(fp); |
| } |
| |
| DP(NETIF_MSG_RX_STATUS, |
| "fp->last_max_sge = %d fp->rx_sge_prod = %d\n", |
| fp->last_max_sge, fp->rx_sge_prod); |
| } |
| |
| static void bnx2x_tpa_start(struct bnx2x_fastpath *fp, u16 queue, |
| struct sk_buff *skb, u16 cons, u16 prod) |
| { |
| struct bnx2x *bp = fp->bp; |
| struct sw_rx_bd *cons_rx_buf = &fp->rx_buf_ring[cons]; |
| struct sw_rx_bd *prod_rx_buf = &fp->rx_buf_ring[prod]; |
| struct eth_rx_bd *prod_bd = &fp->rx_desc_ring[prod]; |
| dma_addr_t mapping; |
| |
| /* move empty skb from pool to prod and map it */ |
| prod_rx_buf->skb = fp->tpa_pool[queue].skb; |
| mapping = dma_map_single(&bp->pdev->dev, fp->tpa_pool[queue].skb->data, |
| bp->rx_buf_size, DMA_FROM_DEVICE); |
| dma_unmap_addr_set(prod_rx_buf, mapping, mapping); |
| |
| /* move partial skb from cons to pool (don't unmap yet) */ |
| fp->tpa_pool[queue] = *cons_rx_buf; |
| |
| /* mark bin state as start - print error if current state != stop */ |
| if (fp->tpa_state[queue] != BNX2X_TPA_STOP) |
| BNX2X_ERR("start of bin not in stop [%d]\n", queue); |
| |
| fp->tpa_state[queue] = BNX2X_TPA_START; |
| |
| /* point prod_bd to new skb */ |
| prod_bd->addr_hi = cpu_to_le32(U64_HI(mapping)); |
| prod_bd->addr_lo = cpu_to_le32(U64_LO(mapping)); |
| |
| #ifdef BNX2X_STOP_ON_ERROR |
| fp->tpa_queue_used |= (1 << queue); |
| #ifdef _ASM_GENERIC_INT_L64_H |
| DP(NETIF_MSG_RX_STATUS, "fp->tpa_queue_used = 0x%lx\n", |
| #else |
| DP(NETIF_MSG_RX_STATUS, "fp->tpa_queue_used = 0x%llx\n", |
| #endif |
| fp->tpa_queue_used); |
| #endif |
| } |
| |
| static int bnx2x_fill_frag_skb(struct bnx2x *bp, struct bnx2x_fastpath *fp, |
| struct sk_buff *skb, |
| struct eth_fast_path_rx_cqe *fp_cqe, |
| u16 cqe_idx) |
| { |
| struct sw_rx_page *rx_pg, old_rx_pg; |
| u16 len_on_bd = le16_to_cpu(fp_cqe->len_on_bd); |
| u32 i, frag_len, frag_size, pages; |
| int err; |
| int j; |
| |
| frag_size = le16_to_cpu(fp_cqe->pkt_len) - len_on_bd; |
| pages = SGE_PAGE_ALIGN(frag_size) >> SGE_PAGE_SHIFT; |
| |
| /* This is needed in order to enable forwarding support */ |
| if (frag_size) |
| skb_shinfo(skb)->gso_size = min((u32)SGE_PAGE_SIZE, |
| max(frag_size, (u32)len_on_bd)); |
| |
| #ifdef BNX2X_STOP_ON_ERROR |
| if (pages > min_t(u32, 8, MAX_SKB_FRAGS)*SGE_PAGE_SIZE*PAGES_PER_SGE) { |
| BNX2X_ERR("SGL length is too long: %d. CQE index is %d\n", |
| pages, cqe_idx); |
| BNX2X_ERR("fp_cqe->pkt_len = %d fp_cqe->len_on_bd = %d\n", |
| fp_cqe->pkt_len, len_on_bd); |
| bnx2x_panic(); |
| return -EINVAL; |
| } |
| #endif |
| |
| /* Run through the SGL and compose the fragmented skb */ |
| for (i = 0, j = 0; i < pages; i += PAGES_PER_SGE, j++) { |
| u16 sge_idx = RX_SGE(le16_to_cpu(fp_cqe->sgl[j])); |
| |
| /* FW gives the indices of the SGE as if the ring is an array |
| (meaning that "next" element will consume 2 indices) */ |
| frag_len = min(frag_size, (u32)(SGE_PAGE_SIZE*PAGES_PER_SGE)); |
| rx_pg = &fp->rx_page_ring[sge_idx]; |
| old_rx_pg = *rx_pg; |
| |
| /* If we fail to allocate a substitute page, we simply stop |
| where we are and drop the whole packet */ |
| err = bnx2x_alloc_rx_sge(bp, fp, sge_idx); |
| if (unlikely(err)) { |
| fp->eth_q_stats.rx_skb_alloc_failed++; |
| return err; |
| } |
| |
| /* Unmap the page as we r going to pass it to the stack */ |
| dma_unmap_page(&bp->pdev->dev, |
| dma_unmap_addr(&old_rx_pg, mapping), |
| SGE_PAGE_SIZE*PAGES_PER_SGE, DMA_FROM_DEVICE); |
| |
| /* Add one frag and update the appropriate fields in the skb */ |
| skb_fill_page_desc(skb, j, old_rx_pg.page, 0, frag_len); |
| |
| skb->data_len += frag_len; |
| skb->truesize += frag_len; |
| skb->len += frag_len; |
| |
| frag_size -= frag_len; |
| } |
| |
| return 0; |
| } |
| |
| static void bnx2x_tpa_stop(struct bnx2x *bp, struct bnx2x_fastpath *fp, |
| u16 queue, int pad, int len, union eth_rx_cqe *cqe, |
| u16 cqe_idx) |
| { |
| struct sw_rx_bd *rx_buf = &fp->tpa_pool[queue]; |
| struct sk_buff *skb = rx_buf->skb; |
| /* alloc new skb */ |
| struct sk_buff *new_skb = netdev_alloc_skb(bp->dev, bp->rx_buf_size); |
| |
| /* Unmap skb in the pool anyway, as we are going to change |
| pool entry status to BNX2X_TPA_STOP even if new skb allocation |
| fails. */ |
| dma_unmap_single(&bp->pdev->dev, dma_unmap_addr(rx_buf, mapping), |
| bp->rx_buf_size, DMA_FROM_DEVICE); |
| |
| if (likely(new_skb)) { |
| /* fix ip xsum and give it to the stack */ |
| /* (no need to map the new skb) */ |
| #ifdef BCM_VLAN |
| int is_vlan_cqe = |
| (le16_to_cpu(cqe->fast_path_cqe.pars_flags.flags) & |
| PARSING_FLAGS_VLAN); |
| int is_not_hwaccel_vlan_cqe = |
| (is_vlan_cqe && (!(bp->flags & HW_VLAN_RX_FLAG))); |
| #endif |
| |
| prefetch(skb); |
| prefetch(((char *)(skb)) + 128); |
| |
| #ifdef BNX2X_STOP_ON_ERROR |
| if (pad + len > bp->rx_buf_size) { |
| BNX2X_ERR("skb_put is about to fail... " |
| "pad %d len %d rx_buf_size %d\n", |
| pad, len, bp->rx_buf_size); |
| bnx2x_panic(); |
| return; |
| } |
| #endif |
| |
| skb_reserve(skb, pad); |
| skb_put(skb, len); |
| |
| skb->protocol = eth_type_trans(skb, bp->dev); |
| skb->ip_summed = CHECKSUM_UNNECESSARY; |
| |
| { |
| struct iphdr *iph; |
| |
| iph = (struct iphdr *)skb->data; |
| #ifdef BCM_VLAN |
| /* If there is no Rx VLAN offloading - |
| take VLAN tag into an account */ |
| if (unlikely(is_not_hwaccel_vlan_cqe)) |
| iph = (struct iphdr *)((u8 *)iph + VLAN_HLEN); |
| #endif |
| iph->check = 0; |
| iph->check = ip_fast_csum((u8 *)iph, iph->ihl); |
| } |
| |
| if (!bnx2x_fill_frag_skb(bp, fp, skb, |
| &cqe->fast_path_cqe, cqe_idx)) { |
| #ifdef BCM_VLAN |
| if ((bp->vlgrp != NULL) && is_vlan_cqe && |
| (!is_not_hwaccel_vlan_cqe)) |
| vlan_gro_receive(&fp->napi, bp->vlgrp, |
| le16_to_cpu(cqe->fast_path_cqe. |
| vlan_tag), skb); |
| else |
| #endif |
| napi_gro_receive(&fp->napi, skb); |
| } else { |
| DP(NETIF_MSG_RX_STATUS, "Failed to allocate new pages" |
| " - dropping packet!\n"); |
| dev_kfree_skb(skb); |
| } |
| |
| |
| /* put new skb in bin */ |
| fp->tpa_pool[queue].skb = new_skb; |
| |
| } else { |
| /* else drop the packet and keep the buffer in the bin */ |
| DP(NETIF_MSG_RX_STATUS, |
| "Failed to allocate new skb - dropping packet!\n"); |
| fp->eth_q_stats.rx_skb_alloc_failed++; |
| } |
| |
| fp->tpa_state[queue] = BNX2X_TPA_STOP; |
| } |
| |
| /* Set Toeplitz hash value in the skb using the value from the |
| * CQE (calculated by HW). |
| */ |
| static inline void bnx2x_set_skb_rxhash(struct bnx2x *bp, union eth_rx_cqe *cqe, |
| struct sk_buff *skb) |
| { |
| /* Set Toeplitz hash from CQE */ |
| if ((bp->dev->features & NETIF_F_RXHASH) && |
| (cqe->fast_path_cqe.status_flags & |
| ETH_FAST_PATH_RX_CQE_RSS_HASH_FLG)) |
| skb->rxhash = |
| le32_to_cpu(cqe->fast_path_cqe.rss_hash_result); |
| } |
| |
| int bnx2x_rx_int(struct bnx2x_fastpath *fp, int budget) |
| { |
| struct bnx2x *bp = fp->bp; |
| u16 bd_cons, bd_prod, bd_prod_fw, comp_ring_cons; |
| u16 hw_comp_cons, sw_comp_cons, sw_comp_prod; |
| int rx_pkt = 0; |
| |
| #ifdef BNX2X_STOP_ON_ERROR |
| if (unlikely(bp->panic)) |
| return 0; |
| #endif |
| |
| /* CQ "next element" is of the size of the regular element, |
| that's why it's ok here */ |
| hw_comp_cons = le16_to_cpu(*fp->rx_cons_sb); |
| if ((hw_comp_cons & MAX_RCQ_DESC_CNT) == MAX_RCQ_DESC_CNT) |
| hw_comp_cons++; |
| |
| bd_cons = fp->rx_bd_cons; |
| bd_prod = fp->rx_bd_prod; |
| bd_prod_fw = bd_prod; |
| sw_comp_cons = fp->rx_comp_cons; |
| sw_comp_prod = fp->rx_comp_prod; |
| |
| /* Memory barrier necessary as speculative reads of the rx |
| * buffer can be ahead of the index in the status block |
| */ |
| rmb(); |
| |
| DP(NETIF_MSG_RX_STATUS, |
| "queue[%d]: hw_comp_cons %u sw_comp_cons %u\n", |
| fp->index, hw_comp_cons, sw_comp_cons); |
| |
| while (sw_comp_cons != hw_comp_cons) { |
| struct sw_rx_bd *rx_buf = NULL; |
| struct sk_buff *skb; |
| union eth_rx_cqe *cqe; |
| u8 cqe_fp_flags; |
| u16 len, pad; |
| |
| comp_ring_cons = RCQ_BD(sw_comp_cons); |
| bd_prod = RX_BD(bd_prod); |
| bd_cons = RX_BD(bd_cons); |
| |
| /* Prefetch the page containing the BD descriptor |
| at producer's index. It will be needed when new skb is |
| allocated */ |
| prefetch((void *)(PAGE_ALIGN((unsigned long) |
| (&fp->rx_desc_ring[bd_prod])) - |
| PAGE_SIZE + 1)); |
| |
| cqe = &fp->rx_comp_ring[comp_ring_cons]; |
| cqe_fp_flags = cqe->fast_path_cqe.type_error_flags; |
| |
| DP(NETIF_MSG_RX_STATUS, "CQE type %x err %x status %x" |
| " queue %x vlan %x len %u\n", CQE_TYPE(cqe_fp_flags), |
| cqe_fp_flags, cqe->fast_path_cqe.status_flags, |
| le32_to_cpu(cqe->fast_path_cqe.rss_hash_result), |
| le16_to_cpu(cqe->fast_path_cqe.vlan_tag), |
| le16_to_cpu(cqe->fast_path_cqe.pkt_len)); |
| |
| /* is this a slowpath msg? */ |
| if (unlikely(CQE_TYPE(cqe_fp_flags))) { |
| bnx2x_sp_event(fp, cqe); |
| goto next_cqe; |
| |
| /* this is an rx packet */ |
| } else { |
| rx_buf = &fp->rx_buf_ring[bd_cons]; |
| skb = rx_buf->skb; |
| prefetch(skb); |
| len = le16_to_cpu(cqe->fast_path_cqe.pkt_len); |
| pad = cqe->fast_path_cqe.placement_offset; |
| |
| /* If CQE is marked both TPA_START and TPA_END |
| it is a non-TPA CQE */ |
| if ((!fp->disable_tpa) && |
| (TPA_TYPE(cqe_fp_flags) != |
| (TPA_TYPE_START | TPA_TYPE_END))) { |
| u16 queue = cqe->fast_path_cqe.queue_index; |
| |
| if (TPA_TYPE(cqe_fp_flags) == TPA_TYPE_START) { |
| DP(NETIF_MSG_RX_STATUS, |
| "calling tpa_start on queue %d\n", |
| queue); |
| |
| bnx2x_tpa_start(fp, queue, skb, |
| bd_cons, bd_prod); |
| |
| /* Set Toeplitz hash for an LRO skb */ |
| bnx2x_set_skb_rxhash(bp, cqe, skb); |
| |
| goto next_rx; |
| } |
| |
| if (TPA_TYPE(cqe_fp_flags) == TPA_TYPE_END) { |
| DP(NETIF_MSG_RX_STATUS, |
| "calling tpa_stop on queue %d\n", |
| queue); |
| |
| if (!BNX2X_RX_SUM_FIX(cqe)) |
| BNX2X_ERR("STOP on none TCP " |
| "data\n"); |
| |
| /* This is a size of the linear data |
| on this skb */ |
| len = le16_to_cpu(cqe->fast_path_cqe. |
| len_on_bd); |
| bnx2x_tpa_stop(bp, fp, queue, pad, |
| len, cqe, comp_ring_cons); |
| #ifdef BNX2X_STOP_ON_ERROR |
| if (bp->panic) |
| return 0; |
| #endif |
| |
| bnx2x_update_sge_prod(fp, |
| &cqe->fast_path_cqe); |
| goto next_cqe; |
| } |
| } |
| |
| dma_sync_single_for_device(&bp->pdev->dev, |
| dma_unmap_addr(rx_buf, mapping), |
| pad + RX_COPY_THRESH, |
| DMA_FROM_DEVICE); |
| prefetch(((char *)(skb)) + 128); |
| |
| /* is this an error packet? */ |
| if (unlikely(cqe_fp_flags & ETH_RX_ERROR_FALGS)) { |
| DP(NETIF_MSG_RX_ERR, |
| "ERROR flags %x rx packet %u\n", |
| cqe_fp_flags, sw_comp_cons); |
| fp->eth_q_stats.rx_err_discard_pkt++; |
| goto reuse_rx; |
| } |
| |
| /* Since we don't have a jumbo ring |
| * copy small packets if mtu > 1500 |
| */ |
| if ((bp->dev->mtu > ETH_MAX_PACKET_SIZE) && |
| (len <= RX_COPY_THRESH)) { |
| struct sk_buff *new_skb; |
| |
| new_skb = netdev_alloc_skb(bp->dev, |
| len + pad); |
| if (new_skb == NULL) { |
| DP(NETIF_MSG_RX_ERR, |
| "ERROR packet dropped " |
| "because of alloc failure\n"); |
| fp->eth_q_stats.rx_skb_alloc_failed++; |
| goto reuse_rx; |
| } |
| |
| /* aligned copy */ |
| skb_copy_from_linear_data_offset(skb, pad, |
| new_skb->data + pad, len); |
| skb_reserve(new_skb, pad); |
| skb_put(new_skb, len); |
| |
| bnx2x_reuse_rx_skb(fp, skb, bd_cons, bd_prod); |
| |
| skb = new_skb; |
| |
| } else |
| if (likely(bnx2x_alloc_rx_skb(bp, fp, bd_prod) == 0)) { |
| dma_unmap_single(&bp->pdev->dev, |
| dma_unmap_addr(rx_buf, mapping), |
| bp->rx_buf_size, |
| DMA_FROM_DEVICE); |
| skb_reserve(skb, pad); |
| skb_put(skb, len); |
| |
| } else { |
| DP(NETIF_MSG_RX_ERR, |
| "ERROR packet dropped because " |
| "of alloc failure\n"); |
| fp->eth_q_stats.rx_skb_alloc_failed++; |
| reuse_rx: |
| bnx2x_reuse_rx_skb(fp, skb, bd_cons, bd_prod); |
| goto next_rx; |
| } |
| |
| skb->protocol = eth_type_trans(skb, bp->dev); |
| |
| /* Set Toeplitz hash for a none-LRO skb */ |
| bnx2x_set_skb_rxhash(bp, cqe, skb); |
| |
| skb_checksum_none_assert(skb); |
| if (bp->rx_csum) { |
| if (likely(BNX2X_RX_CSUM_OK(cqe))) |
| skb->ip_summed = CHECKSUM_UNNECESSARY; |
| else |
| fp->eth_q_stats.hw_csum_err++; |
| } |
| } |
| |
| skb_record_rx_queue(skb, fp->index); |
| |
| #ifdef BCM_VLAN |
| if ((bp->vlgrp != NULL) && (bp->flags & HW_VLAN_RX_FLAG) && |
| (le16_to_cpu(cqe->fast_path_cqe.pars_flags.flags) & |
| PARSING_FLAGS_VLAN)) |
| vlan_gro_receive(&fp->napi, bp->vlgrp, |
| le16_to_cpu(cqe->fast_path_cqe.vlan_tag), skb); |
| else |
| #endif |
| napi_gro_receive(&fp->napi, skb); |
| |
| |
| next_rx: |
| rx_buf->skb = NULL; |
| |
| bd_cons = NEXT_RX_IDX(bd_cons); |
| bd_prod = NEXT_RX_IDX(bd_prod); |
| bd_prod_fw = NEXT_RX_IDX(bd_prod_fw); |
| rx_pkt++; |
| next_cqe: |
| sw_comp_prod = NEXT_RCQ_IDX(sw_comp_prod); |
| sw_comp_cons = NEXT_RCQ_IDX(sw_comp_cons); |
| |
| if (rx_pkt == budget) |
| break; |
| } /* while */ |
| |
| fp->rx_bd_cons = bd_cons; |
| fp->rx_bd_prod = bd_prod_fw; |
| fp->rx_comp_cons = sw_comp_cons; |
| fp->rx_comp_prod = sw_comp_prod; |
| |
| /* Update producers */ |
| bnx2x_update_rx_prod(bp, fp, bd_prod_fw, sw_comp_prod, |
| fp->rx_sge_prod); |
| |
| fp->rx_pkt += rx_pkt; |
| fp->rx_calls++; |
| |
| return rx_pkt; |
| } |
| |
| static irqreturn_t bnx2x_msix_fp_int(int irq, void *fp_cookie) |
| { |
| struct bnx2x_fastpath *fp = fp_cookie; |
| struct bnx2x *bp = fp->bp; |
| |
| /* Return here if interrupt is disabled */ |
| if (unlikely(atomic_read(&bp->intr_sem) != 0)) { |
| DP(NETIF_MSG_INTR, "called but intr_sem not 0, returning\n"); |
| return IRQ_HANDLED; |
| } |
| |
| DP(BNX2X_MSG_FP, "got an MSI-X interrupt on IDX:SB [%d:%d]\n", |
| fp->index, fp->sb_id); |
| bnx2x_ack_sb(bp, fp->sb_id, USTORM_ID, 0, IGU_INT_DISABLE, 0); |
| |
| #ifdef BNX2X_STOP_ON_ERROR |
| if (unlikely(bp->panic)) |
| return IRQ_HANDLED; |
| #endif |
| |
| /* Handle Rx and Tx according to MSI-X vector */ |
| prefetch(fp->rx_cons_sb); |
| prefetch(fp->tx_cons_sb); |
| prefetch(&fp->status_blk->u_status_block.status_block_index); |
| prefetch(&fp->status_blk->c_status_block.status_block_index); |
| napi_schedule(&bnx2x_fp(bp, fp->index, napi)); |
| |
| return IRQ_HANDLED; |
| } |
| |
| |
| /* HW Lock for shared dual port PHYs */ |
| void bnx2x_acquire_phy_lock(struct bnx2x *bp) |
| { |
| mutex_lock(&bp->port.phy_mutex); |
| |
| if (bp->port.need_hw_lock) |
| bnx2x_acquire_hw_lock(bp, HW_LOCK_RESOURCE_MDIO); |
| } |
| |
| void bnx2x_release_phy_lock(struct bnx2x *bp) |
| { |
| if (bp->port.need_hw_lock) |
| bnx2x_release_hw_lock(bp, HW_LOCK_RESOURCE_MDIO); |
| |
| mutex_unlock(&bp->port.phy_mutex); |
| } |
| |
| void bnx2x_link_report(struct bnx2x *bp) |
| { |
| if (bp->flags & MF_FUNC_DIS) { |
| netif_carrier_off(bp->dev); |
| netdev_err(bp->dev, "NIC Link is Down\n"); |
| return; |
| } |
| |
| if (bp->link_vars.link_up) { |
| u16 line_speed; |
| |
| if (bp->state == BNX2X_STATE_OPEN) |
| netif_carrier_on(bp->dev); |
| netdev_info(bp->dev, "NIC Link is Up, "); |
| |
| line_speed = bp->link_vars.line_speed; |
| if (IS_E1HMF(bp)) { |
| u16 vn_max_rate; |
| |
| vn_max_rate = |
| ((bp->mf_config & FUNC_MF_CFG_MAX_BW_MASK) >> |
| FUNC_MF_CFG_MAX_BW_SHIFT) * 100; |
| if (vn_max_rate < line_speed) |
| line_speed = vn_max_rate; |
| } |
| pr_cont("%d Mbps ", line_speed); |
| |
| if (bp->link_vars.duplex == DUPLEX_FULL) |
| pr_cont("full duplex"); |
| else |
| pr_cont("half duplex"); |
| |
| if (bp->link_vars.flow_ctrl != BNX2X_FLOW_CTRL_NONE) { |
| if (bp->link_vars.flow_ctrl & BNX2X_FLOW_CTRL_RX) { |
| pr_cont(", receive "); |
| if (bp->link_vars.flow_ctrl & |
| BNX2X_FLOW_CTRL_TX) |
| pr_cont("& transmit "); |
| } else { |
| pr_cont(", transmit "); |
| } |
| pr_cont("flow control ON"); |
| } |
| pr_cont("\n"); |
| |
| } else { /* link_down */ |
| netif_carrier_off(bp->dev); |
| netdev_err(bp->dev, "NIC Link is Down\n"); |
| } |
| } |
| |
| void bnx2x_init_rx_rings(struct bnx2x *bp) |
| { |
| int func = BP_FUNC(bp); |
| int max_agg_queues = CHIP_IS_E1(bp) ? ETH_MAX_AGGREGATION_QUEUES_E1 : |
| ETH_MAX_AGGREGATION_QUEUES_E1H; |
| u16 ring_prod, cqe_ring_prod; |
| int i, j; |
| int rx_ring_size = bp->rx_ring_size ? bp->rx_ring_size : |
| MAX_RX_AVAIL/bp->num_queues; |
| |
| rx_ring_size = max_t(int, MIN_RX_AVAIL, rx_ring_size); |
| |
| bp->rx_buf_size = bp->dev->mtu + ETH_OVREHEAD + BNX2X_RX_ALIGN; |
| DP(NETIF_MSG_IFUP, |
| "mtu %d rx_buf_size %d\n", bp->dev->mtu, bp->rx_buf_size); |
| |
| if (bp->flags & TPA_ENABLE_FLAG) { |
| |
| for_each_queue(bp, j) { |
| struct bnx2x_fastpath *fp = &bp->fp[j]; |
| |
| for (i = 0; i < max_agg_queues; i++) { |
| fp->tpa_pool[i].skb = |
| netdev_alloc_skb(bp->dev, bp->rx_buf_size); |
| if (!fp->tpa_pool[i].skb) { |
| BNX2X_ERR("Failed to allocate TPA " |
| "skb pool for queue[%d] - " |
| "disabling TPA on this " |
| "queue!\n", j); |
| bnx2x_free_tpa_pool(bp, fp, i); |
| fp->disable_tpa = 1; |
| break; |
| } |
| dma_unmap_addr_set((struct sw_rx_bd *) |
| &bp->fp->tpa_pool[i], |
| mapping, 0); |
| fp->tpa_state[i] = BNX2X_TPA_STOP; |
| } |
| } |
| } |
| |
| for_each_queue(bp, j) { |
| struct bnx2x_fastpath *fp = &bp->fp[j]; |
| |
| fp->rx_bd_cons = 0; |
| fp->rx_cons_sb = BNX2X_RX_SB_INDEX; |
| fp->rx_bd_cons_sb = BNX2X_RX_SB_BD_INDEX; |
| |
| /* "next page" elements initialization */ |
| /* SGE ring */ |
| for (i = 1; i <= NUM_RX_SGE_PAGES; i++) { |
| struct eth_rx_sge *sge; |
| |
| sge = &fp->rx_sge_ring[RX_SGE_CNT * i - 2]; |
| sge->addr_hi = |
| cpu_to_le32(U64_HI(fp->rx_sge_mapping + |
| BCM_PAGE_SIZE*(i % NUM_RX_SGE_PAGES))); |
| sge->addr_lo = |
| cpu_to_le32(U64_LO(fp->rx_sge_mapping + |
| BCM_PAGE_SIZE*(i % NUM_RX_SGE_PAGES))); |
| } |
| |
| bnx2x_init_sge_ring_bit_mask(fp); |
| |
| /* RX BD ring */ |
| for (i = 1; i <= NUM_RX_RINGS; i++) { |
| struct eth_rx_bd *rx_bd; |
| |
| rx_bd = &fp->rx_desc_ring[RX_DESC_CNT * i - 2]; |
| rx_bd->addr_hi = |
| cpu_to_le32(U64_HI(fp->rx_desc_mapping + |
| BCM_PAGE_SIZE*(i % NUM_RX_RINGS))); |
| rx_bd->addr_lo = |
| cpu_to_le32(U64_LO(fp->rx_desc_mapping + |
| BCM_PAGE_SIZE*(i % NUM_RX_RINGS))); |
| } |
| |
| /* CQ ring */ |
| for (i = 1; i <= NUM_RCQ_RINGS; i++) { |
| struct eth_rx_cqe_next_page *nextpg; |
| |
| nextpg = (struct eth_rx_cqe_next_page *) |
| &fp->rx_comp_ring[RCQ_DESC_CNT * i - 1]; |
| nextpg->addr_hi = |
| cpu_to_le32(U64_HI(fp->rx_comp_mapping + |
| BCM_PAGE_SIZE*(i % NUM_RCQ_RINGS))); |
| nextpg->addr_lo = |
| cpu_to_le32(U64_LO(fp->rx_comp_mapping + |
| BCM_PAGE_SIZE*(i % NUM_RCQ_RINGS))); |
| } |
| |
| /* Allocate SGEs and initialize the ring elements */ |
| for (i = 0, ring_prod = 0; |
| i < MAX_RX_SGE_CNT*NUM_RX_SGE_PAGES; i++) { |
| |
| if (bnx2x_alloc_rx_sge(bp, fp, ring_prod) < 0) { |
| BNX2X_ERR("was only able to allocate " |
| "%d rx sges\n", i); |
| BNX2X_ERR("disabling TPA for queue[%d]\n", j); |
| /* Cleanup already allocated elements */ |
| bnx2x_free_rx_sge_range(bp, fp, ring_prod); |
| bnx2x_free_tpa_pool(bp, fp, max_agg_queues); |
| fp->disable_tpa = 1; |
| ring_prod = 0; |
| break; |
| } |
| ring_prod = NEXT_SGE_IDX(ring_prod); |
| } |
| fp->rx_sge_prod = ring_prod; |
| |
| /* Allocate BDs and initialize BD ring */ |
| fp->rx_comp_cons = 0; |
| cqe_ring_prod = ring_prod = 0; |
| for (i = 0; i < rx_ring_size; i++) { |
| if (bnx2x_alloc_rx_skb(bp, fp, ring_prod) < 0) { |
| BNX2X_ERR("was only able to allocate " |
| "%d rx skbs on queue[%d]\n", i, j); |
| fp->eth_q_stats.rx_skb_alloc_failed++; |
| break; |
| } |
| ring_prod = NEXT_RX_IDX(ring_prod); |
| cqe_ring_prod = NEXT_RCQ_IDX(cqe_ring_prod); |
| WARN_ON(ring_prod <= i); |
| } |
| |
| fp->rx_bd_prod = ring_prod; |
| /* must not have more available CQEs than BDs */ |
| fp->rx_comp_prod = min_t(u16, NUM_RCQ_RINGS*RCQ_DESC_CNT, |
| cqe_ring_prod); |
| fp->rx_pkt = fp->rx_calls = 0; |
| |
| /* Warning! |
| * this will generate an interrupt (to the TSTORM) |
| * must only be done after chip is initialized |
| */ |
| bnx2x_update_rx_prod(bp, fp, ring_prod, fp->rx_comp_prod, |
| fp->rx_sge_prod); |
| if (j != 0) |
| continue; |
| |
| REG_WR(bp, BAR_USTRORM_INTMEM + |
| USTORM_MEM_WORKAROUND_ADDRESS_OFFSET(func), |
| U64_LO(fp->rx_comp_mapping)); |
| REG_WR(bp, BAR_USTRORM_INTMEM + |
| USTORM_MEM_WORKAROUND_ADDRESS_OFFSET(func) + 4, |
| U64_HI(fp->rx_comp_mapping)); |
| } |
| } |
| static void bnx2x_free_tx_skbs(struct bnx2x *bp) |
| { |
| int i; |
| |
| for_each_queue(bp, i) { |
| struct bnx2x_fastpath *fp = &bp->fp[i]; |
| |
| u16 bd_cons = fp->tx_bd_cons; |
| u16 sw_prod = fp->tx_pkt_prod; |
| u16 sw_cons = fp->tx_pkt_cons; |
| |
| while (sw_cons != sw_prod) { |
| bd_cons = bnx2x_free_tx_pkt(bp, fp, TX_BD(sw_cons)); |
| sw_cons++; |
| } |
| } |
| } |
| |
| static void bnx2x_free_rx_skbs(struct bnx2x *bp) |
| { |
| int i, j; |
| |
| for_each_queue(bp, j) { |
| struct bnx2x_fastpath *fp = &bp->fp[j]; |
| |
| for (i = 0; i < NUM_RX_BD; i++) { |
| struct sw_rx_bd *rx_buf = &fp->rx_buf_ring[i]; |
| struct sk_buff *skb = rx_buf->skb; |
| |
| if (skb == NULL) |
| continue; |
| |
| dma_unmap_single(&bp->pdev->dev, |
| dma_unmap_addr(rx_buf, mapping), |
| bp->rx_buf_size, DMA_FROM_DEVICE); |
| |
| rx_buf->skb = NULL; |
| dev_kfree_skb(skb); |
| } |
| if (!fp->disable_tpa) |
| bnx2x_free_tpa_pool(bp, fp, CHIP_IS_E1(bp) ? |
| ETH_MAX_AGGREGATION_QUEUES_E1 : |
| ETH_MAX_AGGREGATION_QUEUES_E1H); |
| } |
| } |
| |
| void bnx2x_free_skbs(struct bnx2x *bp) |
| { |
| bnx2x_free_tx_skbs(bp); |
| bnx2x_free_rx_skbs(bp); |
| } |
| |
| static void bnx2x_free_msix_irqs(struct bnx2x *bp) |
| { |
| int i, offset = 1; |
| |
| free_irq(bp->msix_table[0].vector, bp->dev); |
| DP(NETIF_MSG_IFDOWN, "released sp irq (%d)\n", |
| bp->msix_table[0].vector); |
| |
| #ifdef BCM_CNIC |
| offset++; |
| #endif |
| for_each_queue(bp, i) { |
| DP(NETIF_MSG_IFDOWN, "about to release fp #%d->%d irq " |
| "state %x\n", i, bp->msix_table[i + offset].vector, |
| bnx2x_fp(bp, i, state)); |
| |
| free_irq(bp->msix_table[i + offset].vector, &bp->fp[i]); |
| } |
| } |
| |
| void bnx2x_free_irq(struct bnx2x *bp, bool disable_only) |
| { |
| if (bp->flags & USING_MSIX_FLAG) { |
| if (!disable_only) |
| bnx2x_free_msix_irqs(bp); |
| pci_disable_msix(bp->pdev); |
| bp->flags &= ~USING_MSIX_FLAG; |
| |
| } else if (bp->flags & USING_MSI_FLAG) { |
| if (!disable_only) |
| free_irq(bp->pdev->irq, bp->dev); |
| pci_disable_msi(bp->pdev); |
| bp->flags &= ~USING_MSI_FLAG; |
| |
| } else if (!disable_only) |
| free_irq(bp->pdev->irq, bp->dev); |
| } |
| |
| static int bnx2x_enable_msix(struct bnx2x *bp) |
| { |
| int i, rc, offset = 1; |
| int igu_vec = 0; |
| |
| bp->msix_table[0].entry = igu_vec; |
| DP(NETIF_MSG_IFUP, "msix_table[0].entry = %d (slowpath)\n", igu_vec); |
| |
| #ifdef BCM_CNIC |
| igu_vec = BP_L_ID(bp) + offset; |
| bp->msix_table[1].entry = igu_vec; |
| DP(NETIF_MSG_IFUP, "msix_table[1].entry = %d (CNIC)\n", igu_vec); |
| offset++; |
| #endif |
| for_each_queue(bp, i) { |
| igu_vec = BP_L_ID(bp) + offset + i; |
| bp->msix_table[i + offset].entry = igu_vec; |
| DP(NETIF_MSG_IFUP, "msix_table[%d].entry = %d " |
| "(fastpath #%u)\n", i + offset, igu_vec, i); |
| } |
| |
| rc = pci_enable_msix(bp->pdev, &bp->msix_table[0], |
| BNX2X_NUM_QUEUES(bp) + offset); |
| |
| /* |
| * reconfigure number of tx/rx queues according to available |
| * MSI-X vectors |
| */ |
| if (rc >= BNX2X_MIN_MSIX_VEC_CNT) { |
| /* vectors available for FP */ |
| int fp_vec = rc - BNX2X_MSIX_VEC_FP_START; |
| |
| DP(NETIF_MSG_IFUP, |
| "Trying to use less MSI-X vectors: %d\n", rc); |
| |
| rc = pci_enable_msix(bp->pdev, &bp->msix_table[0], rc); |
| |
| if (rc) { |
| DP(NETIF_MSG_IFUP, |
| "MSI-X is not attainable rc %d\n", rc); |
| return rc; |
| } |
| |
| bp->num_queues = min(bp->num_queues, fp_vec); |
| |
| DP(NETIF_MSG_IFUP, "New queue configuration set: %d\n", |
| bp->num_queues); |
| } else if (rc) { |
| DP(NETIF_MSG_IFUP, "MSI-X is not attainable rc %d\n", rc); |
| return rc; |
| } |
| |
| bp->flags |= USING_MSIX_FLAG; |
| |
| return 0; |
| } |
| |
| static int bnx2x_req_msix_irqs(struct bnx2x *bp) |
| { |
| int i, rc, offset = 1; |
| |
| rc = request_irq(bp->msix_table[0].vector, bnx2x_msix_sp_int, 0, |
| bp->dev->name, bp->dev); |
| if (rc) { |
| BNX2X_ERR("request sp irq failed\n"); |
| return -EBUSY; |
| } |
| |
| #ifdef BCM_CNIC |
| offset++; |
| #endif |
| for_each_queue(bp, i) { |
| struct bnx2x_fastpath *fp = &bp->fp[i]; |
| snprintf(fp->name, sizeof(fp->name), "%s-fp-%d", |
| bp->dev->name, i); |
| |
| rc = request_irq(bp->msix_table[i + offset].vector, |
| bnx2x_msix_fp_int, 0, fp->name, fp); |
| if (rc) { |
| BNX2X_ERR("request fp #%d irq failed rc %d\n", i, rc); |
| bnx2x_free_msix_irqs(bp); |
| return -EBUSY; |
| } |
| |
| fp->state = BNX2X_FP_STATE_IRQ; |
| } |
| |
| i = BNX2X_NUM_QUEUES(bp); |
| netdev_info(bp->dev, "using MSI-X IRQs: sp %d fp[%d] %d" |
| " ... fp[%d] %d\n", |
| bp->msix_table[0].vector, |
| 0, bp->msix_table[offset].vector, |
| i - 1, bp->msix_table[offset + i - 1].vector); |
| |
| return 0; |
| } |
| |
| static int bnx2x_enable_msi(struct bnx2x *bp) |
| { |
| int rc; |
| |
| rc = pci_enable_msi(bp->pdev); |
| if (rc) { |
| DP(NETIF_MSG_IFUP, "MSI is not attainable\n"); |
| return -1; |
| } |
| bp->flags |= USING_MSI_FLAG; |
| |
| return 0; |
| } |
| |
| static int bnx2x_req_irq(struct bnx2x *bp) |
| { |
| unsigned long flags; |
| int rc; |
| |
| if (bp->flags & USING_MSI_FLAG) |
| flags = 0; |
| else |
| flags = IRQF_SHARED; |
| |
| rc = request_irq(bp->pdev->irq, bnx2x_interrupt, flags, |
| bp->dev->name, bp->dev); |
| if (!rc) |
| bnx2x_fp(bp, 0, state) = BNX2X_FP_STATE_IRQ; |
| |
| return rc; |
| } |
| |
| static void bnx2x_napi_enable(struct bnx2x *bp) |
| { |
| int i; |
| |
| for_each_queue(bp, i) |
| napi_enable(&bnx2x_fp(bp, i, napi)); |
| } |
| |
| static void bnx2x_napi_disable(struct bnx2x *bp) |
| { |
| int i; |
| |
| for_each_queue(bp, i) |
| napi_disable(&bnx2x_fp(bp, i, napi)); |
| } |
| |
| void bnx2x_netif_start(struct bnx2x *bp) |
| { |
| int intr_sem; |
| |
| intr_sem = atomic_dec_and_test(&bp->intr_sem); |
| smp_wmb(); /* Ensure that bp->intr_sem update is SMP-safe */ |
| |
| if (intr_sem) { |
| if (netif_running(bp->dev)) { |
| bnx2x_napi_enable(bp); |
| bnx2x_int_enable(bp); |
| if (bp->state == BNX2X_STATE_OPEN) |
| netif_tx_wake_all_queues(bp->dev); |
| } |
| } |
| } |
| |
| void bnx2x_netif_stop(struct bnx2x *bp, int disable_hw) |
| { |
| bnx2x_int_disable_sync(bp, disable_hw); |
| bnx2x_napi_disable(bp); |
| netif_tx_disable(bp->dev); |
| } |
| static int bnx2x_set_num_queues(struct bnx2x *bp) |
| { |
| int rc = 0; |
| |
| switch (bp->int_mode) { |
| case INT_MODE_INTx: |
| case INT_MODE_MSI: |
| bp->num_queues = 1; |
| DP(NETIF_MSG_IFUP, "set number of queues to 1\n"); |
| break; |
| default: |
| /* Set number of queues according to bp->multi_mode value */ |
| bnx2x_set_num_queues_msix(bp); |
| |
| DP(NETIF_MSG_IFUP, "set number of queues to %d\n", |
| bp->num_queues); |
| |
| /* if we can't use MSI-X we only need one fp, |
| * so try to enable MSI-X with the requested number of fp's |
| * and fallback to MSI or legacy INTx with one fp |
| */ |
| rc = bnx2x_enable_msix(bp); |
| if (rc) |
| /* failed to enable MSI-X */ |
| bp->num_queues = 1; |
| break; |
| } |
| bp->dev->real_num_tx_queues = bp->num_queues; |
| return rc; |
| } |
| |
| static void bnx2x_release_firmware(struct bnx2x *bp) |
| { |
| kfree(bp->init_ops_offsets); |
| kfree(bp->init_ops); |
| kfree(bp->init_data); |
| release_firmware(bp->firmware); |
| } |
| |
| /* must be called with rtnl_lock */ |
| int bnx2x_nic_load(struct bnx2x *bp, int load_mode) |
| { |
| u32 load_code; |
| int i, rc; |
| |
| /* Set init arrays */ |
| rc = bnx2x_init_firmware(bp); |
| if (rc) { |
| BNX2X_ERR("Error loading firmware\n"); |
| return rc; |
| } |
| |
| #ifdef BNX2X_STOP_ON_ERROR |
| if (unlikely(bp->panic)) |
| return -EPERM; |
| #endif |
| |
| bp->state = BNX2X_STATE_OPENING_WAIT4_LOAD; |
| |
| rc = bnx2x_set_num_queues(bp); |
| |
| if (bnx2x_alloc_mem(bp)) { |
| bnx2x_free_irq(bp, true); |
| return -ENOMEM; |
| } |
| |
| for_each_queue(bp, i) |
| bnx2x_fp(bp, i, disable_tpa) = |
| ((bp->flags & TPA_ENABLE_FLAG) == 0); |
| |
| for_each_queue(bp, i) |
| netif_napi_add(bp->dev, &bnx2x_fp(bp, i, napi), |
| bnx2x_poll, 128); |
| |
| bnx2x_napi_enable(bp); |
| |
| if (bp->flags & USING_MSIX_FLAG) { |
| rc = bnx2x_req_msix_irqs(bp); |
| if (rc) { |
| bnx2x_free_irq(bp, true); |
| goto load_error1; |
| } |
| } else { |
| /* Fall to INTx if failed to enable MSI-X due to lack of |
| memory (in bnx2x_set_num_queues()) */ |
| if ((rc != -ENOMEM) && (bp->int_mode != INT_MODE_INTx)) |
| bnx2x_enable_msi(bp); |
| bnx2x_ack_int(bp); |
| rc = bnx2x_req_irq(bp); |
| if (rc) { |
| BNX2X_ERR("IRQ request failed rc %d, aborting\n", rc); |
| bnx2x_free_irq(bp, true); |
| goto load_error1; |
| } |
| if (bp->flags & USING_MSI_FLAG) { |
| bp->dev->irq = bp->pdev->irq; |
| netdev_info(bp->dev, "using MSI IRQ %d\n", |
| bp->pdev->irq); |
| } |
| } |
| |
| /* Send LOAD_REQUEST command to MCP |
| Returns the type of LOAD command: |
| if it is the first port to be initialized |
| common blocks should be initialized, otherwise - not |
| */ |
| if (!BP_NOMCP(bp)) { |
| load_code = bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_REQ, 0); |
| if (!load_code) { |
| BNX2X_ERR("MCP response failure, aborting\n"); |
| rc = -EBUSY; |
| goto load_error2; |
| } |
| if (load_code == FW_MSG_CODE_DRV_LOAD_REFUSED) { |
| rc = -EBUSY; /* other port in diagnostic mode */ |
| goto load_error2; |
| } |
| |
| } else { |
| int port = BP_PORT(bp); |
| |
| DP(NETIF_MSG_IFUP, "NO MCP - load counts %d, %d, %d\n", |
| load_count[0], load_count[1], load_count[2]); |
| load_count[0]++; |
| load_count[1 + port]++; |
| DP(NETIF_MSG_IFUP, "NO MCP - new load counts %d, %d, %d\n", |
| load_count[0], load_count[1], load_count[2]); |
| if (load_count[0] == 1) |
| load_code = FW_MSG_CODE_DRV_LOAD_COMMON; |
| else if (load_count[1 + port] == 1) |
| load_code = FW_MSG_CODE_DRV_LOAD_PORT; |
| else |
| load_code = FW_MSG_CODE_DRV_LOAD_FUNCTION; |
| } |
| |
| if ((load_code == FW_MSG_CODE_DRV_LOAD_COMMON) || |
| (load_code == FW_MSG_CODE_DRV_LOAD_PORT)) |
| bp->port.pmf = 1; |
| else |
| bp->port.pmf = 0; |
| DP(NETIF_MSG_LINK, "pmf %d\n", bp->port.pmf); |
| |
| /* Initialize HW */ |
| rc = bnx2x_init_hw(bp, load_code); |
| if (rc) { |
| BNX2X_ERR("HW init failed, aborting\n"); |
| bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE, 0); |
| bnx2x_fw_command(bp, DRV_MSG_CODE_UNLOAD_REQ_WOL_MCP, 0); |
| bnx2x_fw_command(bp, DRV_MSG_CODE_UNLOAD_DONE, 0); |
| goto load_error2; |
| } |
| |
| /* Setup NIC internals and enable interrupts */ |
| bnx2x_nic_init(bp, load_code); |
| |
| if ((load_code == FW_MSG_CODE_DRV_LOAD_COMMON) && |
| (bp->common.shmem2_base)) |
| SHMEM2_WR(bp, dcc_support, |
| (SHMEM_DCC_SUPPORT_DISABLE_ENABLE_PF_TLV | |
| SHMEM_DCC_SUPPORT_BANDWIDTH_ALLOCATION_TLV)); |
| |
| /* Send LOAD_DONE command to MCP */ |
| if (!BP_NOMCP(bp)) { |
| load_code = bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE, 0); |
| if (!load_code) { |
| BNX2X_ERR("MCP response failure, aborting\n"); |
| rc = -EBUSY; |
| goto load_error3; |
| } |
| } |
| |
| bp->state = BNX2X_STATE_OPENING_WAIT4_PORT; |
| |
| rc = bnx2x_setup_leading(bp); |
| if (rc) { |
| BNX2X_ERR("Setup leading failed!\n"); |
| #ifndef BNX2X_STOP_ON_ERROR |
| goto load_error3; |
| #else |
| bp->panic = 1; |
| return -EBUSY; |
| #endif |
| } |
| |
| if (CHIP_IS_E1H(bp)) |
| if (bp->mf_config & FUNC_MF_CFG_FUNC_DISABLED) { |
| DP(NETIF_MSG_IFUP, "mf_cfg function disabled\n"); |
| bp->flags |= MF_FUNC_DIS; |
| } |
| |
| if (bp->state == BNX2X_STATE_OPEN) { |
| #ifdef BCM_CNIC |
| /* Enable Timer scan */ |
| REG_WR(bp, TM_REG_EN_LINEAR0_TIMER + BP_PORT(bp)*4, 1); |
| #endif |
| for_each_nondefault_queue(bp, i) { |
| rc = bnx2x_setup_multi(bp, i); |
| if (rc) |
| #ifdef BCM_CNIC |
| goto load_error4; |
| #else |
| goto load_error3; |
| #endif |
| } |
| |
| if (CHIP_IS_E1(bp)) |
| bnx2x_set_eth_mac_addr_e1(bp, 1); |
| else |
| bnx2x_set_eth_mac_addr_e1h(bp, 1); |
| #ifdef BCM_CNIC |
| /* Set iSCSI L2 MAC */ |
| mutex_lock(&bp->cnic_mutex); |
| if (bp->cnic_eth_dev.drv_state & CNIC_DRV_STATE_REGD) { |
| bnx2x_set_iscsi_eth_mac_addr(bp, 1); |
| bp->cnic_flags |= BNX2X_CNIC_FLAG_MAC_SET; |
| bnx2x_init_sb(bp, bp->cnic_sb, bp->cnic_sb_mapping, |
| CNIC_SB_ID(bp)); |
| } |
| mutex_unlock(&bp->cnic_mutex); |
| #endif |
| } |
| |
| if (bp->port.pmf) |
| bnx2x_initial_phy_init(bp, load_mode); |
| |
| /* Start fast path */ |
| switch (load_mode) { |
| case LOAD_NORMAL: |
| if (bp->state == BNX2X_STATE_OPEN) { |
| /* Tx queue should be only reenabled */ |
| netif_tx_wake_all_queues(bp->dev); |
| } |
| /* Initialize the receive filter. */ |
| bnx2x_set_rx_mode(bp->dev); |
| break; |
| |
| case LOAD_OPEN: |
| netif_tx_start_all_queues(bp->dev); |
| if (bp->state != BNX2X_STATE_OPEN) |
| netif_tx_disable(bp->dev); |
| /* Initialize the receive filter. */ |
| bnx2x_set_rx_mode(bp->dev); |
| break; |
| |
| case LOAD_DIAG: |
| /* Initialize the receive filter. */ |
| bnx2x_set_rx_mode(bp->dev); |
| bp->state = BNX2X_STATE_DIAG; |
| break; |
| |
| default: |
| break; |
| } |
| |
| if (!bp->port.pmf) |
| bnx2x__link_status_update(bp); |
| |
| /* start the timer */ |
| mod_timer(&bp->timer, jiffies + bp->current_interval); |
| |
| #ifdef BCM_CNIC |
| bnx2x_setup_cnic_irq_info(bp); |
| if (bp->state == BNX2X_STATE_OPEN) |
| bnx2x_cnic_notify(bp, CNIC_CTL_START_CMD); |
| #endif |
| bnx2x_inc_load_cnt(bp); |
| |
| bnx2x_release_firmware(bp); |
| |
| return 0; |
| |
| #ifdef BCM_CNIC |
| load_error4: |
| /* Disable Timer scan */ |
| REG_WR(bp, TM_REG_EN_LINEAR0_TIMER + BP_PORT(bp)*4, 0); |
| #endif |
| load_error3: |
| bnx2x_int_disable_sync(bp, 1); |
| if (!BP_NOMCP(bp)) { |
| bnx2x_fw_command(bp, DRV_MSG_CODE_UNLOAD_REQ_WOL_MCP, 0); |
| bnx2x_fw_command(bp, DRV_MSG_CODE_UNLOAD_DONE, 0); |
| } |
| bp->port.pmf = 0; |
| /* Free SKBs, SGEs, TPA pool and driver internals */ |
| bnx2x_free_skbs(bp); |
| for_each_queue(bp, i) |
| bnx2x_free_rx_sge_range(bp, bp->fp + i, NUM_RX_SGE); |
| load_error2: |
| /* Release IRQs */ |
| bnx2x_free_irq(bp, false); |
| load_error1: |
| bnx2x_napi_disable(bp); |
| for_each_queue(bp, i) |
| netif_napi_del(&bnx2x_fp(bp, i, napi)); |
| bnx2x_free_mem(bp); |
| |
| bnx2x_release_firmware(bp); |
| |
| return rc; |
| } |
| |
| /* must be called with rtnl_lock */ |
| int bnx2x_nic_unload(struct bnx2x *bp, int unload_mode) |
| { |
| int i; |
| |
| if (bp->state == BNX2X_STATE_CLOSED) { |
| /* Interface has been removed - nothing to recover */ |
| bp->recovery_state = BNX2X_RECOVERY_DONE; |
| bp->is_leader = 0; |
| bnx2x_release_hw_lock(bp, HW_LOCK_RESOURCE_RESERVED_08); |
| smp_wmb(); |
| |
| return -EINVAL; |
| } |
| |
| #ifdef BCM_CNIC |
| bnx2x_cnic_notify(bp, CNIC_CTL_STOP_CMD); |
| #endif |
| bp->state = BNX2X_STATE_CLOSING_WAIT4_HALT; |
| |
| /* Set "drop all" */ |
| bp->rx_mode = BNX2X_RX_MODE_NONE; |
| bnx2x_set_storm_rx_mode(bp); |
| |
| /* Disable HW interrupts, NAPI and Tx */ |
| bnx2x_netif_stop(bp, 1); |
| netif_carrier_off(bp->dev); |
| |
| del_timer_sync(&bp->timer); |
| SHMEM_WR(bp, func_mb[BP_FUNC(bp)].drv_pulse_mb, |
| (DRV_PULSE_ALWAYS_ALIVE | bp->fw_drv_pulse_wr_seq)); |
| bnx2x_stats_handle(bp, STATS_EVENT_STOP); |
| |
| /* Release IRQs */ |
| bnx2x_free_irq(bp, false); |
| |
| /* Cleanup the chip if needed */ |
| if (unload_mode != UNLOAD_RECOVERY) |
| bnx2x_chip_cleanup(bp, unload_mode); |
| |
| bp->port.pmf = 0; |
| |
| /* Free SKBs, SGEs, TPA pool and driver internals */ |
| bnx2x_free_skbs(bp); |
| for_each_queue(bp, i) |
| bnx2x_free_rx_sge_range(bp, bp->fp + i, NUM_RX_SGE); |
| for_each_queue(bp, i) |
| netif_napi_del(&bnx2x_fp(bp, i, napi)); |
| bnx2x_free_mem(bp); |
| |
| bp->state = BNX2X_STATE_CLOSED; |
| |
| /* The last driver must disable a "close the gate" if there is no |
| * parity attention or "process kill" pending. |
| */ |
| if ((!bnx2x_dec_load_cnt(bp)) && (!bnx2x_chk_parity_attn(bp)) && |
| bnx2x_reset_is_done(bp)) |
| bnx2x_disable_close_the_gate(bp); |
| |
| /* Reset MCP mail box sequence if there is on going recovery */ |
| if (unload_mode == UNLOAD_RECOVERY) |
| bp->fw_seq = 0; |
| |
| return 0; |
| } |
| int bnx2x_set_power_state(struct bnx2x *bp, pci_power_t state) |
| { |
| u16 pmcsr; |
| |
| pci_read_config_word(bp->pdev, bp->pm_cap + PCI_PM_CTRL, &pmcsr); |
| |
| switch (state) { |
| case PCI_D0: |
| pci_write_config_word(bp->pdev, bp->pm_cap + PCI_PM_CTRL, |
| ((pmcsr & ~PCI_PM_CTRL_STATE_MASK) | |
| PCI_PM_CTRL_PME_STATUS)); |
| |
| if (pmcsr & PCI_PM_CTRL_STATE_MASK) |
| /* delay required during transition out of D3hot */ |
| msleep(20); |
| break; |
| |
| case PCI_D3hot: |
| /* If there are other clients above don't |
| shut down the power */ |
| if (atomic_read(&bp->pdev->enable_cnt) != 1) |
| return 0; |
| /* Don't shut down the power for emulation and FPGA */ |
| if (CHIP_REV_IS_SLOW(bp)) |
| return 0; |
| |
| pmcsr &= ~PCI_PM_CTRL_STATE_MASK; |
| pmcsr |= 3; |
| |
| if (bp->wol) |
| pmcsr |= PCI_PM_CTRL_PME_ENABLE; |
| |
| pci_write_config_word(bp->pdev, bp->pm_cap + PCI_PM_CTRL, |
| pmcsr); |
| |
| /* No more memory access after this point until |
| * device is brought back to D0. |
| */ |
| break; |
| |
| default: |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| |
| |
| /* |
| * net_device service functions |
| */ |
| |
| static int bnx2x_poll(struct napi_struct *napi, int budget) |
| { |
| int work_done = 0; |
| struct bnx2x_fastpath *fp = container_of(napi, struct bnx2x_fastpath, |
| napi); |
| struct bnx2x *bp = fp->bp; |
| |
| while (1) { |
| #ifdef BNX2X_STOP_ON_ERROR |
| if (unlikely(bp->panic)) { |
| napi_complete(napi); |
| return 0; |
| } |
| #endif |
| |
| if (bnx2x_has_tx_work(fp)) |
| bnx2x_tx_int(fp); |
| |
| if (bnx2x_has_rx_work(fp)) { |
| work_done += bnx2x_rx_int(fp, budget - work_done); |
| |
| /* must not complete if we consumed full budget */ |
| if (work_done >= budget) |
| break; |
| } |
| |
| /* Fall out from the NAPI loop if needed */ |
| if (!(bnx2x_has_rx_work(fp) || bnx2x_has_tx_work(fp))) { |
| bnx2x_update_fpsb_idx(fp); |
| /* bnx2x_has_rx_work() reads the status block, thus we need |
| * to ensure that status block indices have been actually read |
| * (bnx2x_update_fpsb_idx) prior to this check |
| * (bnx2x_has_rx_work) so that we won't write the "newer" |
| * value of the status block to IGU (if there was a DMA right |
| * after bnx2x_has_rx_work and if there is no rmb, the memory |
| * reading (bnx2x_update_fpsb_idx) may be postponed to right |
| * before bnx2x_ack_sb). In this case there will never be |
| * another interrupt until there is another update of the |
| * status block, while there is still unhandled work. |
| */ |
| rmb(); |
| |
| if (!(bnx2x_has_rx_work(fp) || bnx2x_has_tx_work(fp))) { |
| napi_complete(napi); |
| /* Re-enable interrupts */ |
| bnx2x_ack_sb(bp, fp->sb_id, CSTORM_ID, |
| le16_to_cpu(fp->fp_c_idx), |
| IGU_INT_NOP, 1); |
| bnx2x_ack_sb(bp, fp->sb_id, USTORM_ID, |
| le16_to_cpu(fp->fp_u_idx), |
| IGU_INT_ENABLE, 1); |
| break; |
| } |
| } |
| } |
| |
| return work_done; |
| } |
| |
| |
| /* we split the first BD into headers and data BDs |
| * to ease the pain of our fellow microcode engineers |
| * we use one mapping for both BDs |
| * So far this has only been observed to happen |
| * in Other Operating Systems(TM) |
| */ |
| static noinline u16 bnx2x_tx_split(struct bnx2x *bp, |
| struct bnx2x_fastpath *fp, |
| struct sw_tx_bd *tx_buf, |
| struct eth_tx_start_bd **tx_bd, u16 hlen, |
| u16 bd_prod, int nbd) |
| { |
| struct eth_tx_start_bd *h_tx_bd = *tx_bd; |
| struct eth_tx_bd *d_tx_bd; |
| dma_addr_t mapping; |
| int old_len = le16_to_cpu(h_tx_bd->nbytes); |
| |
| /* first fix first BD */ |
| h_tx_bd->nbd = cpu_to_le16(nbd); |
| h_tx_bd->nbytes = cpu_to_le16(hlen); |
| |
| DP(NETIF_MSG_TX_QUEUED, "TSO split header size is %d " |
| "(%x:%x) nbd %d\n", h_tx_bd->nbytes, h_tx_bd->addr_hi, |
| h_tx_bd->addr_lo, h_tx_bd->nbd); |
| |
| /* now get a new data BD |
| * (after the pbd) and fill it */ |
| bd_prod = TX_BD(NEXT_TX_IDX(bd_prod)); |
| d_tx_bd = &fp->tx_desc_ring[bd_prod].reg_bd; |
| |
| mapping = HILO_U64(le32_to_cpu(h_tx_bd->addr_hi), |
| le32_to_cpu(h_tx_bd->addr_lo)) + hlen; |
| |
| d_tx_bd->addr_hi = cpu_to_le32(U64_HI(mapping)); |
| d_tx_bd->addr_lo = cpu_to_le32(U64_LO(mapping)); |
| d_tx_bd->nbytes = cpu_to_le16(old_len - hlen); |
| |
| /* this marks the BD as one that has no individual mapping */ |
| tx_buf->flags |= BNX2X_TSO_SPLIT_BD; |
| |
| DP(NETIF_MSG_TX_QUEUED, |
| "TSO split data size is %d (%x:%x)\n", |
| d_tx_bd->nbytes, d_tx_bd->addr_hi, d_tx_bd->addr_lo); |
| |
| /* update tx_bd */ |
| *tx_bd = (struct eth_tx_start_bd *)d_tx_bd; |
| |
| return bd_prod; |
| } |
| |
| static inline u16 bnx2x_csum_fix(unsigned char *t_header, u16 csum, s8 fix) |
| { |
| if (fix > 0) |
| csum = (u16) ~csum_fold(csum_sub(csum, |
| csum_partial(t_header - fix, fix, 0))); |
| |
| else if (fix < 0) |
| csum = (u16) ~csum_fold(csum_add(csum, |
| csum_partial(t_header, -fix, 0))); |
| |
| return swab16(csum); |
| } |
| |
| static inline u32 bnx2x_xmit_type(struct bnx2x *bp, struct sk_buff *skb) |
| { |
| u32 rc; |
| |
| if (skb->ip_summed != CHECKSUM_PARTIAL) |
| rc = XMIT_PLAIN; |
| |
| else { |
| if (skb->protocol == htons(ETH_P_IPV6)) { |
| rc = XMIT_CSUM_V6; |
| if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) |
| rc |= XMIT_CSUM_TCP; |
| |
| } else { |
| rc = XMIT_CSUM_V4; |
| if (ip_hdr(skb)->protocol == IPPROTO_TCP) |
| rc |= XMIT_CSUM_TCP; |
| } |
| } |
| |
| if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4) |
| rc |= (XMIT_GSO_V4 | XMIT_CSUM_V4 | XMIT_CSUM_TCP); |
| |
| else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) |
| rc |= (XMIT_GSO_V6 | XMIT_CSUM_TCP | XMIT_CSUM_V6); |
| |
| return rc; |
| } |
| |
| #if (MAX_SKB_FRAGS >= MAX_FETCH_BD - 3) |
| /* check if packet requires linearization (packet is too fragmented) |
| no need to check fragmentation if page size > 8K (there will be no |
| violation to FW restrictions) */ |
| static int bnx2x_pkt_req_lin(struct bnx2x *bp, struct sk_buff *skb, |
| u32 xmit_type) |
| { |
| int to_copy = 0; |
| int hlen = 0; |
| int first_bd_sz = 0; |
| |
| /* 3 = 1 (for linear data BD) + 2 (for PBD and last BD) */ |
| if (skb_shinfo(skb)->nr_frags >= (MAX_FETCH_BD - 3)) { |
| |
| if (xmit_type & XMIT_GSO) { |
| unsigned short lso_mss = skb_shinfo(skb)->gso_size; |
| /* Check if LSO packet needs to be copied: |
| 3 = 1 (for headers BD) + 2 (for PBD and last BD) */ |
| int wnd_size = MAX_FETCH_BD - 3; |
| /* Number of windows to check */ |
| int num_wnds = skb_shinfo(skb)->nr_frags - wnd_size; |
| int wnd_idx = 0; |
| int frag_idx = 0; |
| u32 wnd_sum = 0; |
| |
| /* Headers length */ |
| hlen = (int)(skb_transport_header(skb) - skb->data) + |
| tcp_hdrlen(skb); |
| |
| /* Amount of data (w/o headers) on linear part of SKB*/ |
| first_bd_sz = skb_headlen(skb) - hlen; |
| |
| wnd_sum = first_bd_sz; |
| |
| /* Calculate the first sum - it's special */ |
| for (frag_idx = 0; frag_idx < wnd_size - 1; frag_idx++) |
| wnd_sum += |
| skb_shinfo(skb)->frags[frag_idx].size; |
| |
| /* If there was data on linear skb data - check it */ |
| if (first_bd_sz > 0) { |
| if (unlikely(wnd_sum < lso_mss)) { |
| to_copy = 1; |
| goto exit_lbl; |
| } |
| |
| wnd_sum -= first_bd_sz; |
| } |
| |
| /* Others are easier: run through the frag list and |
| check all windows */ |
| for (wnd_idx = 0; wnd_idx <= num_wnds; wnd_idx++) { |
| wnd_sum += |
| skb_shinfo(skb)->frags[wnd_idx + wnd_size - 1].size; |
| |
| if (unlikely(wnd_sum < lso_mss)) { |
| to_copy = 1; |
| break; |
| } |
| wnd_sum -= |
| skb_shinfo(skb)->frags[wnd_idx].size; |
| } |
| } else { |
| /* in non-LSO too fragmented packet should always |
| be linearized */ |
| to_copy = 1; |
| } |
| } |
| |
| exit_lbl: |
| if (unlikely(to_copy)) |
| DP(NETIF_MSG_TX_QUEUED, |
| "Linearization IS REQUIRED for %s packet. " |
| "num_frags %d hlen %d first_bd_sz %d\n", |
| (xmit_type & XMIT_GSO) ? "LSO" : "non-LSO", |
| skb_shinfo(skb)->nr_frags, hlen, first_bd_sz); |
| |
| return to_copy; |
| } |
| #endif |
| |
| /* called with netif_tx_lock |
| * bnx2x_tx_int() runs without netif_tx_lock unless it needs to call |
| * netif_wake_queue() |
| */ |
| netdev_tx_t bnx2x_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct bnx2x *bp = netdev_priv(dev); |
| struct bnx2x_fastpath *fp; |
| struct netdev_queue *txq; |
| struct sw_tx_bd *tx_buf; |
| struct eth_tx_start_bd *tx_start_bd; |
| struct eth_tx_bd *tx_data_bd, *total_pkt_bd = NULL; |
| struct eth_tx_parse_bd *pbd = NULL; |
| u16 pkt_prod, bd_prod; |
| int nbd, fp_index; |
| dma_addr_t mapping; |
| u32 xmit_type = bnx2x_xmit_type(bp, skb); |
| int i; |
| u8 hlen = 0; |
| __le16 pkt_size = 0; |
| struct ethhdr *eth; |
| u8 mac_type = UNICAST_ADDRESS; |
| |
| #ifdef BNX2X_STOP_ON_ERROR |
| if (unlikely(bp->panic)) |
| return NETDEV_TX_BUSY; |
| #endif |
| |
| fp_index = skb_get_queue_mapping(skb); |
| txq = netdev_get_tx_queue(dev, fp_index); |
| |
| fp = &bp->fp[fp_index]; |
| |
| if (unlikely(bnx2x_tx_avail(fp) < (skb_shinfo(skb)->nr_frags + 3))) { |
| fp->eth_q_stats.driver_xoff++; |
| netif_tx_stop_queue(txq); |
| BNX2X_ERR("BUG! Tx ring full when queue awake!\n"); |
| return NETDEV_TX_BUSY; |
| } |
| |
| DP(NETIF_MSG_TX_QUEUED, "SKB: summed %x protocol %x protocol(%x,%x)" |
| " gso type %x xmit_type %x\n", |
| skb->ip_summed, skb->protocol, ipv6_hdr(skb)->nexthdr, |
| ip_hdr(skb)->protocol, skb_shinfo(skb)->gso_type, xmit_type); |
| |
| eth = (struct ethhdr *)skb->data; |
| |
| /* set flag according to packet type (UNICAST_ADDRESS is default)*/ |
| if (unlikely(is_multicast_ether_addr(eth->h_dest))) { |
| if (is_broadcast_ether_addr(eth->h_dest)) |
| mac_type = BROADCAST_ADDRESS; |
| else |
| mac_type = MULTICAST_ADDRESS; |
| } |
| |
| #if (MAX_SKB_FRAGS >= MAX_FETCH_BD - 3) |
| /* First, check if we need to linearize the skb (due to FW |
| restrictions). No need to check fragmentation if page size > 8K |
| (there will be no violation to FW restrictions) */ |
| if (bnx2x_pkt_req_lin(bp, skb, xmit_type)) { |
| /* Statistics of linearization */ |
| bp->lin_cnt++; |
| if (skb_linearize(skb) != 0) { |
| DP(NETIF_MSG_TX_QUEUED, "SKB linearization failed - " |
| "silently dropping this SKB\n"); |
| dev_kfree_skb_any(skb); |
| return NETDEV_TX_OK; |
| } |
| } |
| #endif |
| |
| /* |
| Please read carefully. First we use one BD which we mark as start, |
| then we have a parsing info BD (used for TSO or xsum), |
| and only then we have the rest of the TSO BDs. |
| (don't forget to mark the last one as last, |
| and to unmap only AFTER you write to the BD ...) |
| And above all, all pdb sizes are in words - NOT DWORDS! |
| */ |
| |
| pkt_prod = fp->tx_pkt_prod++; |
| bd_prod = TX_BD(fp->tx_bd_prod); |
| |
| /* get a tx_buf and first BD */ |
| tx_buf = &fp->tx_buf_ring[TX_BD(pkt_prod)]; |
| tx_start_bd = &fp->tx_desc_ring[bd_prod].start_bd; |
| |
| tx_start_bd->bd_flags.as_bitfield = ETH_TX_BD_FLAGS_START_BD; |
| tx_start_bd->general_data = (mac_type << |
| ETH_TX_START_BD_ETH_ADDR_TYPE_SHIFT); |
| /* header nbd */ |
| tx_start_bd->general_data |= (1 << ETH_TX_START_BD_HDR_NBDS_SHIFT); |
| |
| /* remember the first BD of the packet */ |
| tx_buf->first_bd = fp->tx_bd_prod; |
| tx_buf->skb = skb; |
| tx_buf->flags = 0; |
| |
| DP(NETIF_MSG_TX_QUEUED, |
| "sending pkt %u @%p next_idx %u bd %u @%p\n", |
| pkt_prod, tx_buf, fp->tx_pkt_prod, bd_prod, tx_start_bd); |
| |
| #ifdef BCM_VLAN |
| if ((bp->vlgrp != NULL) && vlan_tx_tag_present(skb) && |
| (bp->flags & HW_VLAN_TX_FLAG)) { |
| tx_start_bd->vlan = cpu_to_le16(vlan_tx_tag_get(skb)); |
| tx_start_bd->bd_flags.as_bitfield |= ETH_TX_BD_FLAGS_VLAN_TAG; |
| } else |
| #endif |
| tx_start_bd->vlan = cpu_to_le16(pkt_prod); |
| |
| /* turn on parsing and get a BD */ |
| bd_prod = TX_BD(NEXT_TX_IDX(bd_prod)); |
| pbd = &fp->tx_desc_ring[bd_prod].parse_bd; |
| |
| memset(pbd, 0, sizeof(struct eth_tx_parse_bd)); |
| |
| if (xmit_type & XMIT_CSUM) { |
| hlen = (skb_network_header(skb) - skb->data) / 2; |
| |
| /* for now NS flag is not used in Linux */ |
| pbd->global_data = |
| (hlen | ((skb->protocol == cpu_to_be16(ETH_P_8021Q)) << |
| ETH_TX_PARSE_BD_LLC_SNAP_EN_SHIFT)); |
| |
| pbd->ip_hlen = (skb_transport_header(skb) - |
| skb_network_header(skb)) / 2; |
| |
| hlen += pbd->ip_hlen + tcp_hdrlen(skb) / 2; |
| |
| pbd->total_hlen = cpu_to_le16(hlen); |
| hlen = hlen*2; |
| |
| tx_start_bd->bd_flags.as_bitfield |= ETH_TX_BD_FLAGS_L4_CSUM; |
| |
| if (xmit_type & XMIT_CSUM_V4) |
| tx_start_bd->bd_flags.as_bitfield |= |
| ETH_TX_BD_FLAGS_IP_CSUM; |
| else |
| tx_start_bd->bd_flags.as_bitfield |= |
| ETH_TX_BD_FLAGS_IPV6; |
| |
| if (xmit_type & XMIT_CSUM_TCP) { |
| pbd->tcp_pseudo_csum = swab16(tcp_hdr(skb)->check); |
| |
| } else { |
| s8 fix = SKB_CS_OFF(skb); /* signed! */ |
| |
| pbd->global_data |= ETH_TX_PARSE_BD_UDP_CS_FLG; |
| |
| DP(NETIF_MSG_TX_QUEUED, |
| "hlen %d fix %d csum before fix %x\n", |
| le16_to_cpu(pbd->total_hlen), fix, SKB_CS(skb)); |
| |
| /* HW bug: fixup the CSUM */ |
| pbd->tcp_pseudo_csum = |
| bnx2x_csum_fix(skb_transport_header(skb), |
| SKB_CS(skb), fix); |
| |
| DP(NETIF_MSG_TX_QUEUED, "csum after fix %x\n", |
| pbd->tcp_pseudo_csum); |
| } |
| } |
| |
| mapping = dma_map_single(&bp->pdev->dev, skb->data, |
| skb_headlen(skb), DMA_TO_DEVICE); |
| |
| tx_start_bd->addr_hi = cpu_to_le32(U64_HI(mapping)); |
| tx_start_bd->addr_lo = cpu_to_le32(U64_LO(mapping)); |
| nbd = skb_shinfo(skb)->nr_frags + 2; /* start_bd + pbd + frags */ |
| tx_start_bd->nbd = cpu_to_le16(nbd); |
| tx_start_bd->nbytes = cpu_to_le16(skb_headlen(skb)); |
| pkt_size = tx_start_bd->nbytes; |
| |
| DP(NETIF_MSG_TX_QUEUED, "first bd @%p addr (%x:%x) nbd %d" |
| " nbytes %d flags %x vlan %x\n", |
| tx_start_bd, tx_start_bd->addr_hi, tx_start_bd->addr_lo, |
| le16_to_cpu(tx_start_bd->nbd), le16_to_cpu(tx_start_bd->nbytes), |
| tx_start_bd->bd_flags.as_bitfield, le16_to_cpu(tx_start_bd->vlan)); |
| |
| if (xmit_type & XMIT_GSO) { |
| |
| DP(NETIF_MSG_TX_QUEUED, |
| "TSO packet len %d hlen %d total len %d tso size %d\n", |
| skb->len, hlen, skb_headlen(skb), |
| skb_shinfo(skb)->gso_size); |
| |
| tx_start_bd->bd_flags.as_bitfield |= ETH_TX_BD_FLAGS_SW_LSO; |
| |
| if (unlikely(skb_headlen(skb) > hlen)) |
| bd_prod = bnx2x_tx_split(bp, fp, tx_buf, &tx_start_bd, |
| hlen, bd_prod, ++nbd); |
| |
| pbd->lso_mss = cpu_to_le16(skb_shinfo(skb)->gso_size); |
| pbd->tcp_send_seq = swab32(tcp_hdr(skb)->seq); |
| pbd->tcp_flags = pbd_tcp_flags(skb); |
| |
| if (xmit_type & XMIT_GSO_V4) { |
| pbd->ip_id = swab16(ip_hdr(skb)->id); |
| pbd->tcp_pseudo_csum = |
| swab16(~csum_tcpudp_magic(ip_hdr(skb)->saddr, |
| ip_hdr(skb)->daddr, |
| 0, IPPROTO_TCP, 0)); |
| |
| } else |
| pbd->tcp_pseudo_csum = |
| swab16(~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
| &ipv6_hdr(skb)->daddr, |
| 0, IPPROTO_TCP, 0)); |
| |
| pbd->global_data |= ETH_TX_PARSE_BD_PSEUDO_CS_WITHOUT_LEN; |
| } |
| tx_data_bd = (struct eth_tx_bd *)tx_start_bd; |
| |
| for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { |
| skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
| |
| bd_prod = TX_BD(NEXT_TX_IDX(bd_prod)); |
| tx_data_bd = &fp->tx_desc_ring[bd_prod].reg_bd; |
| if (total_pkt_bd == NULL) |
| total_pkt_bd = &fp->tx_desc_ring[bd_prod].reg_bd; |
| |
| mapping = dma_map_page(&bp->pdev->dev, frag->page, |
| frag->page_offset, |
| frag->size, DMA_TO_DEVICE); |
| |
| tx_data_bd->addr_hi = cpu_to_le32(U64_HI(mapping)); |
| tx_data_bd->addr_lo = cpu_to_le32(U64_LO(mapping)); |
| tx_data_bd->nbytes = cpu_to_le16(frag->size); |
| le16_add_cpu(&pkt_size, frag->size); |
| |
| DP(NETIF_MSG_TX_QUEUED, |
| "frag %d bd @%p addr (%x:%x) nbytes %d\n", |
| i, tx_data_bd, tx_data_bd->addr_hi, tx_data_bd->addr_lo, |
| le16_to_cpu(tx_data_bd->nbytes)); |
| } |
| |
| DP(NETIF_MSG_TX_QUEUED, "last bd @%p\n", tx_data_bd); |
| |
| bd_prod = TX_BD(NEXT_TX_IDX(bd_prod)); |
| |
| /* now send a tx doorbell, counting the next BD |
| * if the packet contains or ends with it |
| */ |
| if (TX_BD_POFF(bd_prod) < nbd) |
| nbd++; |
| |
| if (total_pkt_bd != NULL) |
| total_pkt_bd->total_pkt_bytes = pkt_size; |
| |
| if (pbd) |
| DP(NETIF_MSG_TX_QUEUED, |
| "PBD @%p ip_data %x ip_hlen %u ip_id %u lso_mss %u" |
| " tcp_flags %x xsum %x seq %u hlen %u\n", |
| pbd, pbd->global_data, pbd->ip_hlen, pbd->ip_id, |
| pbd->lso_mss, pbd->tcp_flags, pbd->tcp_pseudo_csum, |
| pbd->tcp_send_seq, le16_to_cpu(pbd->total_hlen)); |
| |
| DP(NETIF_MSG_TX_QUEUED, "doorbell: nbd %d bd %u\n", nbd, bd_prod); |
| |
| /* |
| * Make sure that the BD data is updated before updating the producer |
| * since FW might read the BD right after the producer is updated. |
| * This is only applicable for weak-ordered memory model archs such |
| * as IA-64. The following barrier is also mandatory since FW will |
| * assumes packets must have BDs. |
| */ |
| wmb(); |
| |
| fp->tx_db.data.prod += nbd; |
| barrier(); |
| DOORBELL(bp, fp->index, fp->tx_db.raw); |
| |
| mmiowb(); |
| |
| fp->tx_bd_prod += nbd; |
| |
| if (unlikely(bnx2x_tx_avail(fp) < MAX_SKB_FRAGS + 3)) { |
| netif_tx_stop_queue(txq); |
| |
| /* paired memory barrier is in bnx2x_tx_int(), we have to keep |
| * ordering of set_bit() in netif_tx_stop_queue() and read of |
| * fp->bd_tx_cons */ |
| smp_mb(); |
| |
| fp->eth_q_stats.driver_xoff++; |
| if (bnx2x_tx_avail(fp) >= MAX_SKB_FRAGS + 3) |
| netif_tx_wake_queue(txq); |
| } |
| fp->tx_pkt++; |
| |
| return NETDEV_TX_OK; |
| } |
| /* called with rtnl_lock */ |
| int bnx2x_change_mac_addr(struct net_device *dev, void *p) |
| { |
| struct sockaddr *addr = p; |
| struct bnx2x *bp = netdev_priv(dev); |
| |
| if (!is_valid_ether_addr((u8 *)(addr->sa_data))) |
| return -EINVAL; |
| |
| memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); |
| if (netif_running(dev)) { |
| if (CHIP_IS_E1(bp)) |
| bnx2x_set_eth_mac_addr_e1(bp, 1); |
| else |
| bnx2x_set_eth_mac_addr_e1h(bp, 1); |
| } |
| |
| return 0; |
| } |
| |
| /* called with rtnl_lock */ |
| int bnx2x_change_mtu(struct net_device *dev, int new_mtu) |
| { |
| struct bnx2x *bp = netdev_priv(dev); |
| int rc = 0; |
| |
| if (bp->recovery_state != BNX2X_RECOVERY_DONE) { |
| printk(KERN_ERR "Handling parity error recovery. Try again later\n"); |
| return -EAGAIN; |
| } |
| |
| if ((new_mtu > ETH_MAX_JUMBO_PACKET_SIZE) || |
| ((new_mtu + ETH_HLEN) < ETH_MIN_PACKET_SIZE)) |
| return -EINVAL; |
| |
| /* This does not race with packet allocation |
| * because the actual alloc size is |
| * only updated as part of load |
| */ |
| dev->mtu = new_mtu; |
| |
| if (netif_running(dev)) { |
| bnx2x_nic_unload(bp, UNLOAD_NORMAL); |
| rc = bnx2x_nic_load(bp, LOAD_NORMAL); |
| } |
| |
| return rc; |
| } |
| |
| void bnx2x_tx_timeout(struct net_device *dev) |
| { |
| struct bnx2x *bp = netdev_priv(dev); |
| |
| #ifdef BNX2X_STOP_ON_ERROR |
| if (!bp->panic) |
| bnx2x_panic(); |
| #endif |
| /* This allows the netif to be shutdown gracefully before resetting */ |
| schedule_delayed_work(&bp->reset_task, 0); |
| } |
| |
| #ifdef BCM_VLAN |
| /* called with rtnl_lock */ |
| void bnx2x_vlan_rx_register(struct net_device *dev, |
| struct vlan_group *vlgrp) |
| { |
| struct bnx2x *bp = netdev_priv(dev); |
| |
| bp->vlgrp = vlgrp; |
| |
| /* Set flags according to the required capabilities */ |
| bp->flags &= ~(HW_VLAN_RX_FLAG | HW_VLAN_TX_FLAG); |
| |
| if (dev->features & NETIF_F_HW_VLAN_TX) |
| bp->flags |= HW_VLAN_TX_FLAG; |
| |
| if (dev->features & NETIF_F_HW_VLAN_RX) |
| bp->flags |= HW_VLAN_RX_FLAG; |
| |
| if (netif_running(dev)) |
| bnx2x_set_client_config(bp); |
| } |
| |
| #endif |
| int bnx2x_suspend(struct pci_dev *pdev, pm_message_t state) |
| { |
| struct net_device *dev = pci_get_drvdata(pdev); |
| struct bnx2x *bp; |
| |
| if (!dev) { |
| dev_err(&pdev->dev, "BAD net device from bnx2x_init_one\n"); |
| return -ENODEV; |
| } |
| bp = netdev_priv(dev); |
| |
| rtnl_lock(); |
| |
| pci_save_state(pdev); |
| |
| if (!netif_running(dev)) { |
| rtnl_unlock(); |
| return 0; |
| } |
| |
| netif_device_detach(dev); |
| |
| bnx2x_nic_unload(bp, UNLOAD_CLOSE); |
| |
| bnx2x_set_power_state(bp, pci_choose_state(pdev, state)); |
| |
| rtnl_unlock(); |
| |
| return 0; |
| } |
| |
| int bnx2x_resume(struct pci_dev *pdev) |
| { |
| struct net_device *dev = pci_get_drvdata(pdev); |
| struct bnx2x *bp; |
| int rc; |
| |
| if (!dev) { |
| dev_err(&pdev->dev, "BAD net device from bnx2x_init_one\n"); |
| return -ENODEV; |
| } |
| bp = netdev_priv(dev); |
| |
| if (bp->recovery_state != BNX2X_RECOVERY_DONE) { |
| printk(KERN_ERR "Handling parity error recovery. Try again later\n"); |
| return -EAGAIN; |
| } |
| |
| rtnl_lock(); |
| |
| pci_restore_state(pdev); |
| |
| if (!netif_running(dev)) { |
| rtnl_unlock(); |
| return 0; |
| } |
| |
| bnx2x_set_power_state(bp, PCI_D0); |
| netif_device_attach(dev); |
| |
| rc = bnx2x_nic_load(bp, LOAD_OPEN); |
| |
| rtnl_unlock(); |
| |
| return rc; |
| } |