diff options
Diffstat (limited to 'drivers/net/bna/bnad.c')
| -rw-r--r-- | drivers/net/bna/bnad.c | 3264 |
1 files changed, 3264 insertions, 0 deletions
diff --git a/drivers/net/bna/bnad.c b/drivers/net/bna/bnad.c new file mode 100644 index 000000000000..7e839b9cec22 --- /dev/null +++ b/drivers/net/bna/bnad.c @@ -0,0 +1,3264 @@ +/* + * Linux network driver for Brocade Converged Network Adapter. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License (GPL) Version 2 as + * published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ +/* + * Copyright (c) 2005-2010 Brocade Communications Systems, Inc. + * All rights reserved + * www.brocade.com + */ +#include <linux/netdevice.h> +#include <linux/skbuff.h> +#include <linux/etherdevice.h> +#include <linux/in.h> +#include <linux/ethtool.h> +#include <linux/if_vlan.h> +#include <linux/if_ether.h> +#include <linux/ip.h> + +#include "bnad.h" +#include "bna.h" +#include "cna.h" + +static DEFINE_MUTEX(bnad_fwimg_mutex); + +/* + * Module params + */ +static uint bnad_msix_disable; +module_param(bnad_msix_disable, uint, 0444); +MODULE_PARM_DESC(bnad_msix_disable, "Disable MSIX mode"); + +static uint bnad_ioc_auto_recover = 1; +module_param(bnad_ioc_auto_recover, uint, 0444); +MODULE_PARM_DESC(bnad_ioc_auto_recover, "Enable / Disable auto recovery"); + +/* + * Global variables + */ +u32 bnad_rxqs_per_cq = 2; + +static const u8 bnad_bcast_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; + +/* + * Local MACROS + */ +#define BNAD_TX_UNMAPQ_DEPTH (bnad->txq_depth * 2) + +#define BNAD_RX_UNMAPQ_DEPTH (bnad->rxq_depth) + +#define BNAD_GET_MBOX_IRQ(_bnad) \ + (((_bnad)->cfg_flags & BNAD_CF_MSIX) ? \ + ((_bnad)->msix_table[(_bnad)->msix_num - 1].vector) : \ + ((_bnad)->pcidev->irq)) + +#define BNAD_FILL_UNMAPQ_MEM_REQ(_res_info, _num, _depth) \ +do { \ + (_res_info)->res_type = BNA_RES_T_MEM; \ + (_res_info)->res_u.mem_info.mem_type = BNA_MEM_T_KVA; \ + (_res_info)->res_u.mem_info.num = (_num); \ + (_res_info)->res_u.mem_info.len = \ + sizeof(struct bnad_unmap_q) + \ + (sizeof(struct bnad_skb_unmap) * ((_depth) - 1)); \ +} while (0) + +/* + * Reinitialize completions in CQ, once Rx is taken down + */ +static void +bnad_cq_cmpl_init(struct bnad *bnad, struct bna_ccb *ccb) +{ + struct bna_cq_entry *cmpl, *next_cmpl; + unsigned int wi_range, wis = 0, ccb_prod = 0; + int i; + + BNA_CQ_QPGE_PTR_GET(ccb_prod, ccb->sw_qpt, cmpl, + wi_range); + + for (i = 0; i < ccb->q_depth; i++) { + wis++; + if (likely(--wi_range)) + next_cmpl = cmpl + 1; + else { + BNA_QE_INDX_ADD(ccb_prod, wis, ccb->q_depth); + wis = 0; + BNA_CQ_QPGE_PTR_GET(ccb_prod, ccb->sw_qpt, + next_cmpl, wi_range); + } + cmpl->valid = 0; + cmpl = next_cmpl; + } +} + +/* + * Frees all pending Tx Bufs + * At this point no activity is expected on the Q, + * so DMA unmap & freeing is fine. + */ +static void +bnad_free_all_txbufs(struct bnad *bnad, + struct bna_tcb *tcb) +{ + u16 unmap_cons; + struct bnad_unmap_q *unmap_q = tcb->unmap_q; + struct bnad_skb_unmap *unmap_array; + struct sk_buff *skb = NULL; + int i; + + unmap_array = unmap_q->unmap_array; + + unmap_cons = 0; + while (unmap_cons < unmap_q->q_depth) { + skb = unmap_array[unmap_cons].skb; + if (!skb) { + unmap_cons++; + continue; + } + unmap_array[unmap_cons].skb = NULL; + + pci_unmap_single(bnad->pcidev, + pci_unmap_addr(&unmap_array[unmap_cons], + dma_addr), skb_headlen(skb), + PCI_DMA_TODEVICE); + + pci_unmap_addr_set(&unmap_array[unmap_cons], dma_addr, 0); + unmap_cons++; + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { + pci_unmap_page(bnad->pcidev, + pci_unmap_addr(&unmap_array[unmap_cons], + dma_addr), + skb_shinfo(skb)->frags[i].size, + PCI_DMA_TODEVICE); + pci_unmap_addr_set(&unmap_array[unmap_cons], dma_addr, + 0); + unmap_cons++; + } + dev_kfree_skb_any(skb); + } +} + +/* Data Path Handlers */ + +/* + * bnad_free_txbufs : Frees the Tx bufs on Tx completion + * Can be called in a) Interrupt context + * b) Sending context + * c) Tasklet context + */ +static u32 +bnad_free_txbufs(struct bnad *bnad, + struct bna_tcb *tcb) +{ + u32 sent_packets = 0, sent_bytes = 0; + u16 wis, unmap_cons, updated_hw_cons; + struct bnad_unmap_q *unmap_q = tcb->unmap_q; + struct bnad_skb_unmap *unmap_array; + struct sk_buff *skb; + int i; + + /* + * Just return if TX is stopped. This check is useful + * when bnad_free_txbufs() runs out of a tasklet scheduled + * before bnad_cb_tx_cleanup() cleared BNAD_RF_TX_STARTED bit + * but this routine runs actually after the cleanup has been + * executed. + */ + if (!test_bit(BNAD_RF_TX_STARTED, &bnad->run_flags)) + return 0; + + updated_hw_cons = *(tcb->hw_consumer_index); + + wis = BNA_Q_INDEX_CHANGE(tcb->consumer_index, + updated_hw_cons, tcb->q_depth); + + BUG_ON(!(wis <= BNA_QE_IN_USE_CNT(tcb, tcb->q_depth))); + + unmap_array = unmap_q->unmap_array; + unmap_cons = unmap_q->consumer_index; + + prefetch(&unmap_array[unmap_cons + 1]); + while (wis) { + skb = unmap_array[unmap_cons].skb; + + unmap_array[unmap_cons].skb = NULL; + + sent_packets++; + sent_bytes += skb->len; + wis -= BNA_TXQ_WI_NEEDED(1 + skb_shinfo(skb)->nr_frags); + + pci_unmap_single(bnad->pcidev, + pci_unmap_addr(&unmap_array[unmap_cons], + dma_addr), skb_headlen(skb), + PCI_DMA_TODEVICE); + pci_unmap_addr_set(&unmap_array[unmap_cons], dma_addr, 0); + BNA_QE_INDX_ADD(unmap_cons, 1, unmap_q->q_depth); + + prefetch(&unmap_array[unmap_cons + 1]); + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { + prefetch(&unmap_array[unmap_cons + 1]); + + pci_unmap_page(bnad->pcidev, + pci_unmap_addr(&unmap_array[unmap_cons], + dma_addr), + skb_shinfo(skb)->frags[i].size, + PCI_DMA_TODEVICE); + pci_unmap_addr_set(&unmap_array[unmap_cons], dma_addr, + 0); + BNA_QE_INDX_ADD(unmap_cons, 1, unmap_q->q_depth); + } + dev_kfree_skb_any(skb); + } + + /* Update consumer pointers. */ + tcb->consumer_index = updated_hw_cons; + unmap_q->consumer_index = unmap_cons; + + tcb->txq->tx_packets += sent_packets; + tcb->txq->tx_bytes += sent_bytes; + + return sent_packets; +} + +/* Tx Free Tasklet function */ +/* Frees for all the tcb's in all the Tx's */ +/* + * Scheduled from sending context, so that + * the fat Tx lock is not held for too long + * in the sending context. + */ +static void +bnad_tx_free_tasklet(unsigned long bnad_ptr) +{ + struct bnad *bnad = (struct bnad *)bnad_ptr; + struct bna_tcb *tcb; + u32 acked; + int i, j; + + for (i = 0; i < bnad->num_tx; i++) { + for (j = 0; j < bnad->num_txq_per_tx; j++) { + tcb = bnad->tx_info[i].tcb[j]; + if (!tcb) + continue; + if (((u16) (*tcb->hw_consumer_index) != + tcb->consumer_index) && + (!test_and_set_bit(BNAD_TXQ_FREE_SENT, + &tcb->flags))) { + acked = bnad_free_txbufs(bnad, tcb); + bna_ib_ack(tcb->i_dbell, acked); + smp_mb__before_clear_bit(); + clear_bit(BNAD_TXQ_FREE_SENT, &tcb->flags); + } + } + } +} + +static u32 +bnad_tx(struct bnad *bnad, struct bna_tcb *tcb) +{ + struct net_device *netdev = bnad->netdev; + u32 sent; + + if (test_and_set_bit(BNAD_TXQ_FREE_SENT, &tcb->flags)) + return 0; + + sent = bnad_free_txbufs(bnad, tcb); + if (sent) { + if (netif_queue_stopped(netdev) && + netif_carrier_ok(netdev) && + BNA_QE_FREE_CNT(tcb, tcb->q_depth) >= + BNAD_NETIF_WAKE_THRESHOLD) { + netif_wake_queue(netdev); + BNAD_UPDATE_CTR(bnad, netif_queue_wakeup); + } + bna_ib_ack(tcb->i_dbell, sent); + } else + bna_ib_ack(tcb->i_dbell, 0); + + smp_mb__before_clear_bit(); + clear_bit(BNAD_TXQ_FREE_SENT, &tcb->flags); + + return sent; +} + +/* MSIX Tx Completion Handler */ +static irqreturn_t +bnad_msix_tx(int irq, void *data) +{ + struct bna_tcb *tcb = (struct bna_tcb *)data; + struct bnad *bnad = tcb->bnad; + + bnad_tx(bnad, tcb); + + return IRQ_HANDLED; +} + +static void +bnad_reset_rcb(struct bnad *bnad, struct bna_rcb *rcb) +{ + struct bnad_unmap_q *unmap_q = rcb->unmap_q; + + rcb->producer_index = 0; + rcb->consumer_index = 0; + + unmap_q->producer_index = 0; + unmap_q->consumer_index = 0; +} + +static void +bnad_free_rxbufs(struct bnad *bnad, struct bna_rcb *rcb) +{ + struct bnad_unmap_q *unmap_q; + struct sk_buff *skb; + + unmap_q = rcb->unmap_q; + while (BNA_QE_IN_USE_CNT(unmap_q, unmap_q->q_depth)) { + skb = unmap_q->unmap_array[unmap_q->consumer_index].skb; + BUG_ON(!(skb)); + unmap_q->unmap_array[unmap_q->consumer_index].skb = NULL; + pci_unmap_single(bnad->pcidev, pci_unmap_addr(&unmap_q-> + unmap_array[unmap_q->consumer_index], + dma_addr), rcb->rxq->buffer_size + + NET_IP_ALIGN, PCI_DMA_FROMDEVICE); + dev_kfree_skb(skb); + BNA_QE_INDX_ADD(unmap_q->consumer_index, 1, unmap_q->q_depth); + BNA_QE_INDX_ADD(rcb->consumer_index, 1, rcb->q_depth); + } + + bnad_reset_rcb(bnad, rcb); +} + +static void +bnad_alloc_n_post_rxbufs(struct bnad *bnad, struct bna_rcb *rcb) +{ + u16 to_alloc, alloced, unmap_prod, wi_range; + struct bnad_unmap_q *unmap_q = rcb->unmap_q; + struct bnad_skb_unmap *unmap_array; + struct bna_rxq_entry *rxent; + struct sk_buff *skb; + dma_addr_t dma_addr; + + alloced = 0; + to_alloc = + BNA_QE_FREE_CNT(unmap_q, unmap_q->q_depth); + + unmap_array = unmap_q->unmap_array; + unmap_prod = unmap_q->producer_index; + + BNA_RXQ_QPGE_PTR_GET(unmap_prod, rcb->sw_qpt, rxent, wi_range); + + while (to_alloc--) { + if (!wi_range) { + BNA_RXQ_QPGE_PTR_GET(unmap_prod, rcb->sw_qpt, rxent, + wi_range); + } + skb = alloc_skb(rcb->rxq->buffer_size + NET_IP_ALIGN, + GFP_ATOMIC); + if (unlikely(!skb)) { + BNAD_UPDATE_CTR(bnad, rxbuf_alloc_failed); + goto finishing; + } + skb->dev = bnad->netdev; + skb_reserve(skb, NET_IP_ALIGN); + unmap_array[unmap_prod].skb = skb; + dma_addr = pci_map_single(bnad->pcidev, skb->data, + rcb->rxq->buffer_size, PCI_DMA_FROMDEVICE); + pci_unmap_addr_set(&unmap_array[unmap_prod], dma_addr, + dma_addr); + BNA_SET_DMA_ADDR(dma_addr, &rxent->host_addr); + BNA_QE_INDX_ADD(unmap_prod, 1, unmap_q->q_depth); + + rxent++; + wi_range--; + alloced++; + } + +finishing: + if (likely(alloced)) { + unmap_q->producer_index = unmap_prod; + rcb->producer_index = unmap_prod; + smp_mb(); + bna_rxq_prod_indx_doorbell(rcb); + } +} + +/* + * Locking is required in the enable path + * because it is called from a napi poll + * context, where the bna_lock is not held + * unlike the IRQ context. + */ +static void +bnad_enable_txrx_irqs(struct bnad *bnad) +{ + struct bna_tcb *tcb; + struct bna_ccb *ccb; + int i, j; + unsigned long flags; + + spin_lock_irqsave(&bnad->bna_lock, flags); + for (i = 0; i < bnad->num_tx; i++) { + for (j = 0; j < bnad->num_txq_per_tx; j++) { + tcb = bnad->tx_info[i].tcb[j]; + bna_ib_coalescing_timer_set(tcb->i_dbell, + tcb->txq->ib->ib_config.coalescing_timeo); + bna_ib_ack(tcb->i_dbell, 0); + } + } + + for (i = 0; i < bnad->num_rx; i++) { + for (j = 0; j < bnad->num_rxp_per_rx; j++) { + ccb = bnad->rx_info[i].rx_ctrl[j].ccb; + bnad_enable_rx_irq_unsafe(ccb); + } + } + spin_unlock_irqrestore(&bnad->bna_lock, flags); +} + +static inline void +bnad_refill_rxq(struct bnad *bnad, struct bna_rcb *rcb) +{ + struct bnad_unmap_q *unmap_q = rcb->unmap_q; + + if (!test_and_set_bit(BNAD_RXQ_REFILL, &rcb->flags)) { + if (BNA_QE_FREE_CNT(unmap_q, unmap_q->q_depth) + >> BNAD_RXQ_REFILL_THRESHOLD_SHIFT) + bnad_alloc_n_post_rxbufs(bnad, rcb); + smp_mb__before_clear_bit(); + clear_bit(BNAD_RXQ_REFILL, &rcb->flags); + } +} + +static u32 +bnad_poll_cq(struct bnad *bnad, struct bna_ccb *ccb, int budget) +{ + struct bna_cq_entry *cmpl, *next_cmpl; + struct bna_rcb *rcb = NULL; + unsigned int wi_range, packets = 0, wis = 0; + struct bnad_unmap_q *unmap_q; + struct sk_buff *skb; + u32 flags; + u32 qid0 = ccb->rcb[0]->rxq->rxq_id; + struct bna_pkt_rate *pkt_rt = &ccb->pkt_rate; + + prefetch(bnad->netdev); + BNA_CQ_QPGE_PTR_GET(ccb->producer_index, ccb->sw_qpt, cmpl, + wi_range); + BUG_ON(!(wi_range <= ccb->q_depth)); + while (cmpl->valid && packets < budget) { + packets++; + BNA_UPDATE_PKT_CNT(pkt_rt, ntohs(cmpl->length)); + + if (qid0 == cmpl->rxq_id) + rcb = ccb->rcb[0]; + else + rcb = ccb->rcb[1]; + + unmap_q = rcb->unmap_q; + + skb = unmap_q->unmap_array[unmap_q->consumer_index].skb; + BUG_ON(!(skb)); + unmap_q->unmap_array[unmap_q->consumer_index].skb = NULL; + pci_unmap_single(bnad->pcidev, + pci_unmap_addr(&unmap_q-> + unmap_array[unmap_q-> + consumer_index], + dma_addr), + rcb->rxq->buffer_size, + PCI_DMA_FROMDEVICE); + BNA_QE_INDX_ADD(unmap_q->consumer_index, 1, unmap_q->q_depth); + + /* Should be more efficient ? Performance ? */ + BNA_QE_INDX_ADD(rcb->consumer_index, 1, rcb->q_depth); + + wis++; + if (likely(--wi_range)) + next_cmpl = cmpl + 1; + else { + BNA_QE_INDX_ADD(ccb->producer_index, wis, ccb->q_depth); + wis = 0; + BNA_CQ_QPGE_PTR_GET(ccb->producer_index, ccb->sw_qpt, + next_cmpl, wi_range); + BUG_ON(!(wi_range <= ccb->q_depth)); + } + prefetch(next_cmpl); + + flags = ntohl(cmpl->flags); + if (unlikely + (flags & + (BNA_CQ_EF_MAC_ERROR | BNA_CQ_EF_FCS_ERROR | + BNA_CQ_EF_TOO_LONG))) { + dev_kfree_skb_any(skb); + rcb->rxq->rx_packets_with_error++; + goto next; + } + + skb_put(skb, ntohs(cmpl->length)); + if (likely + (bnad->rx_csum && + (((flags & BNA_CQ_EF_IPV4) && + (flags & BNA_CQ_EF_L3_CKSUM_OK)) || + (flags & BNA_CQ_EF_IPV6)) && + (flags & (BNA_CQ_EF_TCP | BNA_CQ_EF_UDP)) && + (flags & BNA_CQ_EF_L4_CKSUM_OK))) + skb->ip_summed = CHECKSUM_UNNECESSARY; + else + skb_checksum_none_assert(skb); + + rcb->rxq->rx_packets++; + rcb->rxq->rx_bytes += skb->len; + skb->protocol = eth_type_trans(skb, bnad->netdev); + + if (bnad->vlan_grp && (flags & BNA_CQ_EF_VLAN)) { + struct bnad_rx_ctrl *rx_ctrl = + (struct bnad_rx_ctrl *)ccb->ctrl; + if (skb->ip_summed == CHECKSUM_UNNECESSARY) + vlan_gro_receive(&rx_ctrl->napi, bnad->vlan_grp, + ntohs(cmpl->vlan_tag), skb); + else + vlan_hwaccel_receive_skb(skb, + bnad->vlan_grp, + ntohs(cmpl->vlan_tag)); + + } else { /* Not VLAN tagged/stripped */ + struct bnad_rx_ctrl *rx_ctrl = + (struct bnad_rx_ctrl *)ccb->ctrl; + if (skb->ip_summed == CHECKSUM_UNNECESSARY) + napi_gro_receive(&rx_ctrl->napi, skb); + else + netif_receive_skb(skb); + } + +next: + cmpl->valid = 0; + cmpl = next_cmpl; + } + + BNA_QE_INDX_ADD(ccb->producer_index, wis, ccb->q_depth); + + if (likely(ccb)) { + bna_ib_ack(ccb->i_dbell, packets); + bnad_refill_rxq(bnad, ccb->rcb[0]); + if (ccb->rcb[1]) + bnad_refill_rxq(bnad, ccb->rcb[1]); + } else + bna_ib_ack(ccb->i_dbell, 0); + + return packets; +} + +static void +bnad_disable_rx_irq(struct bnad *bnad, struct bna_ccb *ccb) +{ + bna_ib_coalescing_timer_set(ccb->i_dbell, 0); + bna_ib_ack(ccb->i_dbell, 0); +} + +static void +bnad_enable_rx_irq(struct bnad *bnad, struct bna_ccb *ccb) +{ + unsigned long flags; + + spin_lock_irqsave(&bnad->bna_lock, flags); /* Because of polling context */ + bnad_enable_rx_irq_unsafe(ccb); + spin_unlock_irqrestore(&bnad->bna_lock, flags); +} + +static void +bnad_netif_rx_schedule_poll(struct bnad *bnad, struct bna_ccb *ccb) +{ + struct bnad_rx_ctrl *rx_ctrl = (struct bnad_rx_ctrl *)(ccb->ctrl); + if (likely(napi_schedule_prep((&rx_ctrl->napi)))) { + bnad_disable_rx_irq(bnad, ccb); + __napi_schedule((&rx_ctrl->napi)); + } + BNAD_UPDATE_CTR(bnad, netif_rx_schedule); +} + +/* MSIX Rx Path Handler */ +static irqreturn_t +bnad_msix_rx(int irq, void *data) +{ + struct bna_ccb *ccb = (struct bna_ccb *)data; + struct bnad *bnad = ccb->bnad; + + bnad_netif_rx_schedule_poll(bnad, ccb); + + return IRQ_HANDLED; +} + +/* Interrupt handlers */ + +/* Mbox Interrupt Handlers */ +static irqreturn_t +bnad_msix_mbox_handler(int irq, void *data) +{ + u32 intr_status; + unsigned long flags; + struct net_device *netdev = data; + struct bnad *bnad; + + bnad = netdev_priv(netdev); + + /* BNA_ISR_GET(bnad); Inc Ref count */ + spin_lock_irqsave(&bnad->bna_lock, flags); + + bna_intr_status_get(&bnad->bna, intr_status); + + if (BNA_IS_MBOX_ERR_INTR(intr_status)) + bna_mbox_handler(&bnad->bna, intr_status); + + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + /* BNAD_ISR_PUT(bnad); Dec Ref count */ + return IRQ_HANDLED; +} + +static irqreturn_t +bnad_isr(int irq, void *data) +{ + int i, j; + u32 intr_status; + unsigned long flags; + struct net_device *netdev = data; + struct bnad *bnad = netdev_priv(netdev); + struct bnad_rx_info *rx_info; + struct bnad_rx_ctrl *rx_ctrl; + + if (unlikely(test_bit(BNAD_RF_MBOX_IRQ_DISABLED, &bnad->run_flags))) + return IRQ_NONE; + + bna_intr_status_get(&bnad->bna, intr_status); + + if (unlikely(!intr_status)) + return IRQ_NONE; + + spin_lock_irqsave(&bnad->bna_lock, flags); + + if (BNA_IS_MBOX_ERR_INTR(intr_status)) { + bna_mbox_handler(&bnad->bna, intr_status); + if (!BNA_IS_INTX_DATA_INTR(intr_status)) { + spin_unlock_irqrestore(&bnad->bna_lock, flags); + goto done; + } + } + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + /* Process data interrupts */ + for (i = 0; i < bnad->num_rx; i++) { + rx_info = &bnad->rx_info[i]; + if (!rx_info->rx) + continue; + for (j = 0; j < bnad->num_rxp_per_rx; j++) { + rx_ctrl = &rx_info->rx_ctrl[j]; + if (rx_ctrl->ccb) + bnad_netif_rx_schedule_poll(bnad, + rx_ctrl->ccb); + } + } +done: + return IRQ_HANDLED; +} + +/* + * Called in interrupt / callback context + * with bna_lock held, so cfg_flags access is OK + */ +static void +bnad_enable_mbox_irq(struct bnad *bnad) +{ + int irq = BNAD_GET_MBOX_IRQ(bnad); + + if (test_and_clear_bit(BNAD_RF_MBOX_IRQ_DISABLED, &bnad->run_flags)) + if (bnad->cfg_flags & BNAD_CF_MSIX) + enable_irq(irq); + + BNAD_UPDATE_CTR(bnad, mbox_intr_enabled); +} + +/* + * Called with bnad->bna_lock held b'cos of + * bnad->cfg_flags access. + */ +static void +bnad_disable_mbox_irq(struct bnad *bnad) +{ + int irq = BNAD_GET_MBOX_IRQ(bnad); + + + if (!test_and_set_bit(BNAD_RF_MBOX_IRQ_DISABLED, &bnad->run_flags)) + if (bnad->cfg_flags & BNAD_CF_MSIX) + disable_irq_nosync(irq); + + BNAD_UPDATE_CTR(bnad, mbox_intr_disabled); +} + +/* Control Path Handlers */ + +/* Callbacks */ +void +bnad_cb_device_enable_mbox_intr(struct bnad *bnad) +{ + bnad_enable_mbox_irq(bnad); +} + +void +bnad_cb_device_disable_mbox_intr(struct bnad *bnad) +{ + bnad_disable_mbox_irq(bnad); +} + +void +bnad_cb_device_enabled(struct bnad *bnad, enum bna_cb_status status) +{ + complete(&bnad->bnad_completions.ioc_comp); + bnad->bnad_completions.ioc_comp_status = status; +} + +void +bnad_cb_device_disabled(struct bnad *bnad, enum bna_cb_status status) +{ + complete(&bnad->bnad_completions.ioc_comp); + bnad->bnad_completions.ioc_comp_status = status; +} + +static void +bnad_cb_port_disabled(void *arg, enum bna_cb_status status) +{ + struct bnad *bnad = (struct bnad *)arg; + + complete(&bnad->bnad_completions.port_comp); + + netif_carrier_off(bnad->netdev); +} + +void +bnad_cb_port_link_status(struct bnad *bnad, + enum bna_link_status link_status) +{ + bool link_up = 0; + + link_up = (link_status == BNA_LINK_UP) || (link_status == BNA_CEE_UP); + + if (link_status == BNA_CEE_UP) { + set_bit(BNAD_RF_CEE_RUNNING, &bnad->run_flags); + BNAD_UPDATE_CTR(bnad, cee_up); + } else + clear_bit(BNAD_RF_CEE_RUNNING, &bnad->run_flags); + + if (link_up) { + if (!netif_carrier_ok(bnad->netdev)) { + pr_warn("bna: %s link up\n", + bnad->netdev->name); + netif_carrier_on(bnad->netdev); + BNAD_UPDATE_CTR(bnad, link_toggle); + if (test_bit(BNAD_RF_TX_STARTED, &bnad->run_flags)) { + /* Force an immediate Transmit Schedule */ + pr_info("bna: %s TX_STARTED\n", + bnad->netdev->name); + netif_wake_queue(bnad->netdev); + BNAD_UPDATE_CTR(bnad, netif_queue_wakeup); + } else { + netif_stop_queue(bnad->netdev); + BNAD_UPDATE_CTR(bnad, netif_queue_stop); + } + } + } else { + if (netif_carrier_ok(bnad->netdev)) { + pr_warn("bna: %s link down\n", + bnad->netdev->name); + netif_carrier_off(bnad->netdev); + BNAD_UPDATE_CTR(bnad, link_toggle); + } + } +} + +static void +bnad_cb_tx_disabled(void *arg, struct bna_tx *tx, + enum bna_cb_status status) +{ + struct bnad *bnad = (struct bnad *)arg; + + complete(&bnad->bnad_completions.tx_comp); +} + +static void +bnad_cb_tcb_setup(struct bnad *bnad, struct bna_tcb *tcb) +{ + struct bnad_tx_info *tx_info = + (struct bnad_tx_info *)tcb->txq->tx->priv; + struct bnad_unmap_q *unmap_q = tcb->unmap_q; + + tx_info->tcb[tcb->id] = tcb; + unmap_q->producer_index = 0; + unmap_q->consumer_index = 0; + unmap_q->q_depth = BNAD_TX_UNMAPQ_DEPTH; +} + +static void +bnad_cb_tcb_destroy(struct bnad *bnad, struct bna_tcb *tcb) +{ + struct bnad_tx_info *tx_info = + (struct bnad_tx_info *)tcb->txq->tx->priv; + + tx_info->tcb[tcb->id] = NULL; +} + +static void +bnad_cb_rcb_setup(struct bnad *bnad, struct bna_rcb *rcb) +{ + struct bnad_unmap_q *unmap_q = rcb->unmap_q; + + unmap_q->producer_index = 0; + unmap_q->consumer_index = 0; + unmap_q->q_depth = BNAD_RX_UNMAPQ_DEPTH; +} + +static void +bnad_cb_ccb_setup(struct bnad *bnad, struct bna_ccb *ccb) +{ + struct bnad_rx_info *rx_info = + (struct bnad_rx_info *)ccb->cq->rx->priv; + + rx_info->rx_ctrl[ccb->id].ccb = ccb; + ccb->ctrl = &rx_info->rx_ctrl[ccb->id]; +} + +static void +bnad_cb_ccb_destroy(struct bnad *bnad, struct bna_ccb *ccb) +{ + struct bnad_rx_info *rx_info = + (struct bnad_rx_info *)ccb->cq->rx->priv; + + rx_info->rx_ctrl[ccb->id].ccb = NULL; +} + +static void +bnad_cb_tx_stall(struct bnad *bnad, struct bna_tcb *tcb) +{ + struct bnad_tx_info *tx_info = + (struct bnad_tx_info *)tcb->txq->tx->priv; + + if (tx_info != &bnad->tx_info[0]) + return; + + clear_bit(BNAD_RF_TX_STARTED, &bnad->run_flags); + netif_stop_queue(bnad->netdev); + pr_info("bna: %s TX_STOPPED\n", bnad->netdev->name); +} + +static void +bnad_cb_tx_resume(struct bnad *bnad, struct bna_tcb *tcb) +{ + if (test_and_set_bit(BNAD_RF_TX_STARTED, &bnad->run_flags)) + return; + + if (netif_carrier_ok(bnad->netdev)) { + pr_info("bna: %s TX_STARTED\n", bnad->netdev->name); + netif_wake_queue(bnad->netdev); + BNAD_UPDATE_CTR(bnad, netif_queue_wakeup); + } +} + +static void +bnad_cb_tx_cleanup(struct bnad *bnad, struct bna_tcb *tcb) +{ + struct bnad_unmap_q *unmap_q; + + if (!tcb || (!tcb->unmap_q)) + return; + + unmap_q = tcb->unmap_q; + if (!unmap_q->unmap_array) + return; + + if (test_and_set_bit(BNAD_TXQ_FREE_SENT, &tcb->flags)) + return; + + bnad_free_all_txbufs(bnad, tcb); + + unmap_q->producer_index = 0; + unmap_q->consumer_index = 0; + + smp_mb__before_clear_bit(); + clear_bit(BNAD_TXQ_FREE_SENT, &tcb->flags); +} + +static void +bnad_cb_rx_cleanup(struct bnad *bnad, + struct bna_ccb *ccb) +{ + bnad_cq_cmpl_init(bnad, ccb); + + bnad_free_rxbufs(bnad, ccb->rcb[0]); + clear_bit(BNAD_RXQ_STARTED, &ccb->rcb[0]->flags); + + if (ccb->rcb[1]) { + bnad_free_rxbufs(bnad, ccb->rcb[1]); + clear_bit(BNAD_RXQ_STARTED, &ccb->rcb[1]->flags); + } +} + +static void +bnad_cb_rx_post(struct bnad *bnad, struct bna_rcb *rcb) +{ + struct bnad_unmap_q *unmap_q = rcb->unmap_q; + + set_bit(BNAD_RXQ_STARTED, &rcb->flags); + + /* Now allocate & post buffers for this RCB */ + /* !!Allocation in callback context */ + if (!test_and_set_bit(BNAD_RXQ_REFILL, &rcb->flags)) { + if (BNA_QE_FREE_CNT(unmap_q, unmap_q->q_depth) + >> BNAD_RXQ_REFILL_THRESHOLD_SHIFT) + bnad_alloc_n_post_rxbufs(bnad, rcb); + smp_mb__before_clear_bit(); + clear_bit(BNAD_RXQ_REFILL, &rcb->flags); + } +} + +static void +bnad_cb_rx_disabled(void *arg, struct bna_rx *rx, + enum bna_cb_status status) +{ + struct bnad *bnad = (struct bnad *)arg; + + complete(&bnad->bnad_completions.rx_comp); +} + +static void +bnad_cb_rx_mcast_add(struct bnad *bnad, struct bna_rx *rx, + enum bna_cb_status status) +{ + bnad->bnad_completions.mcast_comp_status = status; + complete(&bnad->bnad_completions.mcast_comp); +} + +void +bnad_cb_stats_get(struct bnad *bnad, enum bna_cb_status status, + struct bna_stats *stats) +{ + if (status == BNA_CB_SUCCESS) + BNAD_UPDATE_CTR(bnad, hw_stats_updates); + + if (!netif_running(bnad->netdev) || + !test_bit(BNAD_RF_STATS_TIMER_RUNNING, &bnad->run_flags)) + return; + + mod_timer(&bnad->stats_timer, + jiffies + msecs_to_jiffies(BNAD_STATS_TIMER_FREQ)); +} + +/* Resource allocation, free functions */ + +static void +bnad_mem_free(struct bnad *bnad, + struct bna_mem_info *mem_info) +{ + int i; + dma_addr_t dma_pa; + + if (mem_info->mdl == NULL) + return; + + for (i = 0; i < mem_info->num; i++) { + if (mem_info->mdl[i].kva != NULL) { + if (mem_info->mem_type == BNA_MEM_T_DMA) { + BNA_GET_DMA_ADDR(&(mem_info->mdl[i].dma), + dma_pa); + pci_free_consistent(bnad->pcidev, + mem_info->mdl[i].len, + mem_info->mdl[i].kva, dma_pa); + } else + kfree(mem_info->mdl[i].kva); + } + } + kfree(mem_info->mdl); + mem_info->mdl = NULL; +} + +static int +bnad_mem_alloc(struct bnad *bnad, + struct bna_mem_info *mem_info) +{ + int i; + dma_addr_t dma_pa; + + if ((mem_info->num == 0) || (mem_info->len == 0)) { + mem_info->mdl = NULL; + return 0; + } + + mem_info->mdl = kcalloc(mem_info->num, sizeof(struct bna_mem_descr), + GFP_KERNEL); + if (mem_info->mdl == NULL) + return -ENOMEM; + + if (mem_info->mem_type == BNA_MEM_T_DMA) { + for (i = 0; i < mem_info->num; i++) { + mem_info->mdl[i].len = mem_info->len; + mem_info->mdl[i].kva = + pci_alloc_consistent(bnad->pcidev, + mem_info->len, &dma_pa); + + if (mem_info->mdl[i].kva == NULL) + goto err_return; + + BNA_SET_DMA_ADDR(dma_pa, + &(mem_info->mdl[i].dma)); + } + } else { + for (i = 0; i < mem_info->num; i++) { + mem_info->mdl[i].len = mem_info->len; + mem_info->mdl[i].kva = kzalloc(mem_info->len, + GFP_KERNEL); + if (mem_info->mdl[i].kva == NULL) + goto err_return; + } + } + + return 0; + +err_return: + bnad_mem_free(bnad, mem_info); + return -ENOMEM; +} + +/* Free IRQ for Mailbox */ +static void +bnad_mbox_irq_free(struct bnad *bnad, + struct bna_intr_info *intr_info) +{ + int irq; + unsigned long flags; + + if (intr_info->idl == NULL) + return; + + spin_lock_irqsave(&bnad->bna_lock, flags); + bnad_disable_mbox_irq(bnad); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + irq = BNAD_GET_MBOX_IRQ(bnad); + free_irq(irq, bnad->netdev); + + kfree(intr_info->idl); +} + +/* + * Allocates IRQ for Mailbox, but keep it disabled + * This will be enabled once we get the mbox enable callback + * from bna + */ +static int +bnad_mbox_irq_alloc(struct bnad *bnad, + struct bna_intr_info *intr_info) +{ + int err; + unsigned long flags; + u32 irq; + irq_handler_t irq_handler; + + /* Mbox should use only 1 vector */ + + intr_info->idl = kzalloc(sizeof(*(intr_info->idl)), GFP_KERNEL); + if (!intr_info->idl) + return -ENOMEM; + + spin_lock_irqsave(&bnad->bna_lock, flags); + if (bnad->cfg_flags & BNAD_CF_MSIX) { + irq_handler = (irq_handler_t)bnad_msix_mbox_handler; + irq = bnad->msix_table[bnad->msix_num - 1].vector; + flags = 0; + intr_info->intr_type = BNA_INTR_T_MSIX; + intr_info->idl[0].vector = bnad->msix_num - 1; + } else { + irq_handler = (irq_handler_t)bnad_isr; + irq = bnad->pcidev->irq; + flags = IRQF_SHARED; + intr_info->intr_type = BNA_INTR_T_INTX; + /* intr_info->idl.vector = 0 ? */ + } + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + sprintf(bnad->mbox_irq_name, "%s", BNAD_NAME); + + /* + * Set the Mbox IRQ disable flag, so that the IRQ handler + * called from request_irq() for SHARED IRQs do not execute + */ + set_bit(BNAD_RF_MBOX_IRQ_DISABLED, &bnad->run_flags); + + err = request_irq(irq, irq_handler, flags, + bnad->mbox_irq_name, bnad->netdev); + + if (err) { + kfree(intr_info->idl); + intr_info->idl = NULL; + return err; + } + + spin_lock_irqsave(&bnad->bna_lock, flags); + + if (bnad->cfg_flags & BNAD_CF_MSIX) + disable_irq_nosync(irq); + + spin_unlock_irqrestore(&bnad->bna_lock, flags); + return 0; +} + +static void +bnad_txrx_irq_free(struct bnad *bnad, struct bna_intr_info *intr_info) +{ + kfree(intr_info->idl); + intr_info->idl = NULL; +} + +/* Allocates Interrupt Descriptor List for MSIX/INT-X vectors */ +static int +bnad_txrx_irq_alloc(struct bnad *bnad, enum bnad_intr_source src, + uint txrx_id, struct bna_intr_info *intr_info) +{ + int i, vector_start = 0; + u32 cfg_flags; + unsigned long flags; + + spin_lock_irqsave(&bnad->bna_lock, flags); + cfg_flags = bnad->cfg_flags; + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + if (cfg_flags & BNAD_CF_MSIX) { + intr_info->intr_type = BNA_INTR_T_MSIX; + intr_info->idl = kcalloc(intr_info->num, + sizeof(struct bna_intr_descr), + GFP_KERNEL); + if (!intr_info->idl) + return -ENOMEM; + + switch (src) { + case BNAD_INTR_TX: + vector_start = txrx_id; + break; + + case BNAD_INTR_RX: + vector_start = bnad->num_tx * bnad->num_txq_per_tx + + txrx_id; + break; + + default: + BUG(); + } + + for (i = 0; i < intr_info->num; i++) + intr_info->idl[i].vector = vector_start + i; + } else { + intr_info->intr_type = BNA_INTR_T_INTX; + intr_info->num = 1; + intr_info->idl = kcalloc(intr_info->num, + sizeof(struct bna_intr_descr), + GFP_KERNEL); + if (!intr_info->idl) + return -ENOMEM; + + switch (src) { + case BNAD_INTR_TX: + intr_info->idl[0].vector = 0x1; /* Bit mask : Tx IB */ + break; + + case BNAD_INTR_RX: + intr_info->idl[0].vector = 0x2; /* Bit mask : Rx IB */ + break; + } + } + return 0; +} + +/** + * NOTE: Should be called for MSIX only + * Unregisters Tx MSIX vector(s) from the kernel + */ +static void +bnad_tx_msix_unregister(struct bnad *bnad, struct bnad_tx_info *tx_info, + int num_txqs) +{ + int i; + int vector_num; + + for (i = 0; i < num_txqs; i++) { + if (tx_info->tcb[i] == NULL) + continue; + + vector_num = tx_info->tcb[i]->intr_vector; + free_irq(bnad->msix_table[vector_num].vector, tx_info->tcb[i]); + } +} + +/** + * NOTE: Should be called for MSIX only + * Registers Tx MSIX vector(s) and ISR(s), cookie with the kernel + */ +static int +bnad_tx_msix_register(struct bnad *bnad, struct bnad_tx_info *tx_info, + uint tx_id, int num_txqs) +{ + int i; + int err; + int vector_num; + + for (i = 0; i < num_txqs; i++) { + vector_num = tx_info->tcb[i]->intr_vector; + sprintf(tx_info->tcb[i]->name, "%s TXQ %d", bnad->netdev->name, + tx_id + tx_info->tcb[i]->id); + err = request_irq(bnad->msix_table[vector_num].vector, + (irq_handler_t)bnad_msix_tx, 0, + tx_info->tcb[i]->name, + tx_info->tcb[i]); + if (err) + goto err_return; + } + + return 0; + +err_return: + if (i > 0) + bnad_tx_msix_unregister(bnad, tx_info, (i - 1)); + return -1; +} + +/** + * NOTE: Should be called for MSIX only + * Unregisters Rx MSIX vector(s) from the kernel + */ +static void +bnad_rx_msix_unregister(struct bnad *bnad, struct bnad_rx_info *rx_info, + int num_rxps) +{ + int i; + int vector_num; + + for (i = 0; i < num_rxps; i++) { + if (rx_info->rx_ctrl[i].ccb == NULL) + continue; + + vector_num = rx_info->rx_ctrl[i].ccb->intr_vector; + free_irq(bnad->msix_table[vector_num].vector, + rx_info->rx_ctrl[i].ccb); + } +} + +/** + * NOTE: Should be called for MSIX only + * Registers Tx MSIX vector(s) and ISR(s), cookie with the kernel + */ +static int +bnad_rx_msix_register(struct bnad *bnad, struct bnad_rx_info *rx_info, + uint rx_id, int num_rxps) +{ + int i; + int err; + int vector_num; + + for (i = 0; i < num_rxps; i++) { + vector_num = rx_info->rx_ctrl[i].ccb->intr_vector; + sprintf(rx_info->rx_ctrl[i].ccb->name, "%s CQ %d", + bnad->netdev->name, + rx_id + rx_info->rx_ctrl[i].ccb->id); + err = request_irq(bnad->msix_table[vector_num].vector, + (irq_handler_t)bnad_msix_rx, 0, + rx_info->rx_ctrl[i].ccb->name, + rx_info->rx_ctrl[i].ccb); + if (err) + goto err_return; + } + + return 0; + +err_return: + if (i > 0) + bnad_rx_msix_unregister(bnad, rx_info, (i - 1)); + return -1; +} + +/* Free Tx object Resources */ +static void +bnad_tx_res_free(struct bnad *bnad, struct bna_res_info *res_info) +{ + int i; + + for (i = 0; i < BNA_TX_RES_T_MAX; i++) { + if (res_info[i].res_type == BNA_RES_T_MEM) + bnad_mem_free(bnad, &res_info[i].res_u.mem_info); + else if (res_info[i].res_type == BNA_RES_T_INTR) + bnad_txrx_irq_free(bnad, &res_info[i].res_u.intr_info); + } +} + +/* Allocates memory and interrupt resources for Tx object */ +static int +bnad_tx_res_alloc(struct bnad *bnad, struct bna_res_info *res_info, + uint tx_id) +{ + int i, err = 0; + + for (i = 0; i < BNA_TX_RES_T_MAX; i++) { + if (res_info[i].res_type == BNA_RES_T_MEM) + err = bnad_mem_alloc(bnad, + &res_info[i].res_u.mem_info); + else if (res_info[i].res_type == BNA_RES_T_INTR) + err = bnad_txrx_irq_alloc(bnad, BNAD_INTR_TX, tx_id, + &res_info[i].res_u.intr_info); + if (err) + goto err_return; + } + return 0; + +err_return: + bnad_tx_res_free(bnad, res_info); + return err; +} + +/* Free Rx object Resources */ +static void +bnad_rx_res_free(struct bnad *bnad, struct bna_res_info *res_info) +{ + int i; + + for (i = 0; i < BNA_RX_RES_T_MAX; i++) { + if (res_info[i].res_type == BNA_RES_T_MEM) + bnad_mem_free(bnad, &res_info[i].res_u.mem_info); + else if (res_info[i].res_type == BNA_RES_T_INTR) + bnad_txrx_irq_free(bnad, &res_info[i].res_u.intr_info); + } +} + +/* Allocates memory and interrupt resources for Rx object */ +static int +bnad_rx_res_alloc(struct bnad *bnad, struct bna_res_info *res_info, + uint rx_id) +{ + int i, err = 0; + + /* All memory needs to be allocated before setup_ccbs */ + for (i = 0; i < BNA_RX_RES_T_MAX; i++) { + if (res_info[i].res_type == BNA_RES_T_MEM) + err = bnad_mem_alloc(bnad, + &res_info[i].res_u.mem_info); + else if (res_info[i].res_type == BNA_RES_T_INTR) + err = bnad_txrx_irq_alloc(bnad, BNAD_INTR_RX, rx_id, + &res_info[i].res_u.intr_info); + if (err) + goto err_return; + } + return 0; + +err_return: + bnad_rx_res_free(bnad, res_info); + return err; +} + +/* Timer callbacks */ +/* a) IOC timer */ +static void +bnad_ioc_timeout(unsigned long data) +{ + struct bnad *bnad = (struct bnad *)data; + unsigned long flags; + + spin_lock_irqsave(&bnad->bna_lock, flags); + bfa_nw_ioc_timeout((void *) &bnad->bna.device.ioc); + spin_unlock_irqrestore(&bnad->bna_lock, flags); +} + +static void +bnad_ioc_hb_check(unsigned long data) +{ + struct bnad *bnad = (struct bnad *)data; + unsigned long flags; + + spin_lock_irqsave(&bnad->bna_lock, flags); + bfa_nw_ioc_hb_check((void *) &bnad->bna.device.ioc); + spin_unlock_irqrestore(&bnad->bna_lock, flags); +} + +static void +bnad_ioc_sem_timeout(unsigned long data) +{ + struct bnad *bnad = (struct bnad *)data; + unsigned long flags; + + spin_lock_irqsave(&bnad->bna_lock, flags); + bfa_nw_ioc_sem_timeout((void *) &bnad->bna.device.ioc); + spin_unlock_irqrestore(&bnad->bna_lock, flags); +} + +/* + * All timer routines use bnad->bna_lock to protect against + * the following race, which may occur in case of no locking: + * Time CPU m CPU n + * 0 1 = test_bit + * 1 clear_bit + * 2 del_timer_sync + * 3 mod_timer + */ + +/* b) Dynamic Interrupt Moderation Timer */ +static void +bnad_dim_timeout(unsigned long data) +{ + struct bnad *bnad = (struct bnad *)data; + struct bnad_rx_info *rx_info; + struct bnad_rx_ctrl *rx_ctrl; + int i, j; + unsigned long flags; + + if (!netif_carrier_ok(bnad->netdev)) + return; + + spin_lock_irqsave(&bnad->bna_lock, flags); + for (i = 0; i < bnad->num_rx; i++) { + rx_info = &bnad->rx_info[i]; + if (!rx_info->rx) + continue; + for (j = 0; j < bnad->num_rxp_per_rx; j++) { + rx_ctrl = &rx_info->rx_ctrl[j]; + if (!rx_ctrl->ccb) + continue; + bna_rx_dim_update(rx_ctrl->ccb); + } + } + + /* Check for BNAD_CF_DIM_ENABLED, does not eleminate a race */ + if (test_bit(BNAD_RF_DIM_TIMER_RUNNING, &bnad->run_flags)) + mod_timer(&bnad->dim_timer, + jiffies + msecs_to_jiffies(BNAD_DIM_TIMER_FREQ)); + spin_unlock_irqrestore(&bnad->bna_lock, flags); +} + +/* c) Statistics Timer */ +static void +bnad_stats_timeout(unsigned long data) +{ + struct bnad *bnad = (struct bnad *)data; + unsigned long flags; + + if (!netif_running(bnad->netdev) || + !test_bit(BNAD_RF_STATS_TIMER_RUNNING, &bnad->run_flags)) + return; + + spin_lock_irqsave(&bnad->bna_lock, flags); + bna_stats_get(&bnad->bna); + spin_unlock_irqrestore(&bnad->bna_lock, flags); +} + +/* + * Set up timer for DIM + * Called with bnad->bna_lock held + */ +void +bnad_dim_timer_start(struct bnad *bnad) +{ + if (bnad->cfg_flags & BNAD_CF_DIM_ENABLED && + !test_bit(BNAD_RF_DIM_TIMER_RUNNING, &bnad->run_flags)) { + setup_timer(&bnad->dim_timer, bnad_dim_timeout, + (unsigned long)bnad); + set_bit(BNAD_RF_DIM_TIMER_RUNNING, &bnad->run_flags); + mod_timer(&bnad->dim_timer, + jiffies + msecs_to_jiffies(BNAD_DIM_TIMER_FREQ)); + } +} + +/* + * Set up timer for statistics + * Called with mutex_lock(&bnad->conf_mutex) held + */ +static void +bnad_stats_timer_start(struct bnad *bnad) +{ + unsigned long flags; + + spin_lock_irqsave(&bnad->bna_lock, flags); + if (!test_and_set_bit(BNAD_RF_STATS_TIMER_RUNNING, &bnad->run_flags)) { + setup_timer(&bnad->stats_timer, bnad_stats_timeout, + (unsigned long)bnad); + mod_timer(&bnad->stats_timer, + jiffies + msecs_to_jiffies(BNAD_STATS_TIMER_FREQ)); + } + spin_unlock_irqrestore(&bnad->bna_lock, flags); +} + +/* + * Stops the stats timer + * Called with mutex_lock(&bnad->conf_mutex) held + */ +static void +bnad_stats_timer_stop(struct bnad *bnad) +{ + int to_del = 0; + unsigned long flags; + + spin_lock_irqsave(&bnad->bna_lock, flags); + if (test_and_clear_bit(BNAD_RF_STATS_TIMER_RUNNING, &bnad->run_flags)) + to_del = 1; + spin_unlock_irqrestore(&bnad->bna_lock, flags); + if (to_del) + del_timer_sync(&bnad->stats_timer); +} + +/* Utilities */ + +static void +bnad_netdev_mc_list_get(struct net_device *netdev, u8 *mc_list) +{ + int i = 1; /* Index 0 has broadcast address */ + struct netdev_hw_addr *mc_addr; + + netdev_for_each_mc_addr(mc_addr, netdev) { + memcpy(&mc_list[i * ETH_ALEN], &mc_addr->addr[0], + ETH_ALEN); + i++; + } +} + +static int +bnad_napi_poll_rx(struct napi_struct *napi, int budget) +{ + struct bnad_rx_ctrl *rx_ctrl = + container_of(napi, struct bnad_rx_ctrl, napi); + struct bna_ccb *ccb; + struct bnad *bnad; + int rcvd = 0; + + ccb = rx_ctrl->ccb; + + bnad = ccb->bnad; + + if (!netif_carrier_ok(bnad->netdev)) + goto poll_exit; + + rcvd = bnad_poll_cq(bnad, ccb, budget); + if (rcvd == budget) + return rcvd; + +poll_exit: + napi_complete((napi)); + + BNAD_UPDATE_CTR(bnad, netif_rx_complete); + + bnad_enable_rx_irq(bnad, ccb); + return rcvd; +} + +static int +bnad_napi_poll_txrx(struct napi_struct *napi, int budget) +{ + struct bnad_rx_ctrl *rx_ctrl = + container_of(napi, struct bnad_rx_ctrl, napi); + struct bna_ccb *ccb; + struct bnad *bnad; + int rcvd = 0; + int i, j; + + ccb = rx_ctrl->ccb; + + bnad = ccb->bnad; + + if (!netif_carrier_ok(bnad->netdev)) + goto poll_exit; + + /* Handle Tx Completions, if any */ + for (i = 0; i < bnad->num_tx; i++) { + for (j = 0; j < bnad->num_txq_per_tx; j++) + bnad_tx(bnad, bnad->tx_info[i].tcb[j]); + } + + /* Handle Rx Completions */ + rcvd = bnad_poll_cq(bnad, ccb, budget); + if (rcvd == budget) + return rcvd; +poll_exit: + napi_complete((napi)); + + BNAD_UPDATE_CTR(bnad, netif_rx_complete); + + bnad_enable_txrx_irqs(bnad); + return rcvd; +} + +static void +bnad_napi_enable(struct bnad *bnad, u32 rx_id) +{ + int (*napi_poll) (struct napi_struct *, int); + struct bnad_rx_ctrl *rx_ctrl; + int i; + unsigned long flags; + + spin_lock_irqsave(&bnad->bna_lock, flags); + if (bnad->cfg_flags & BNAD_CF_MSIX) + napi_poll = bnad_napi_poll_rx; + else + napi_poll = bnad_napi_poll_txrx; + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + /* Initialize & enable NAPI */ + for (i = 0; i < bnad->num_rxp_per_rx; i++) { + rx_ctrl = &bnad->rx_info[rx_id].rx_ctrl[i]; + netif_napi_add(bnad->netdev, &rx_ctrl->napi, + napi_poll, 64); + napi_enable(&rx_ctrl->napi); + } +} + +static void +bnad_napi_disable(struct bnad *bnad, u32 rx_id) +{ + int i; + + /* First disable and then clean up */ + for (i = 0; i < bnad->num_rxp_per_rx; i++) { + napi_disable(&bnad->rx_info[rx_id].rx_ctrl[i].napi); + netif_napi_del(&bnad->rx_info[rx_id].rx_ctrl[i].napi); + } +} + +/* Should be held with conf_lock held */ +void +bnad_cleanup_tx(struct bnad *bnad, uint tx_id) +{ + struct bnad_tx_info *tx_info = &bnad->tx_info[tx_id]; + struct bna_res_info *res_info = &bnad->tx_res_info[tx_id].res_info[0]; + unsigned long flags; + + if (!tx_info->tx) + return; + + init_completion(&bnad->bnad_completions.tx_comp); + spin_lock_irqsave(&bnad->bna_lock, flags); + bna_tx_disable(tx_info->tx, BNA_HARD_CLEANUP, bnad_cb_tx_disabled); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + wait_for_completion(&bnad->bnad_completions.tx_comp); + + if (tx_info->tcb[0]->intr_type == BNA_INTR_T_MSIX) + bnad_tx_msix_unregister(bnad, tx_info, + bnad->num_txq_per_tx); + + spin_lock_irqsave(&bnad->bna_lock, flags); + bna_tx_destroy(tx_info->tx); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + tx_info->tx = NULL; + + if (0 == tx_id) + tasklet_kill(&bnad->tx_free_tasklet); + + bnad_tx_res_free(bnad, res_info); +} + +/* Should be held with conf_lock held */ +int +bnad_setup_tx(struct bnad *bnad, uint tx_id) +{ + int err; + struct bnad_tx_info *tx_info = &bnad->tx_info[tx_id]; + struct bna_res_info *res_info = &bnad->tx_res_info[tx_id].res_info[0]; + struct bna_intr_info *intr_info = + &res_info[BNA_TX_RES_INTR_T_TXCMPL].res_u.intr_info; + struct bna_tx_config *tx_config = &bnad->tx_config[tx_id]; + struct bna_tx_event_cbfn tx_cbfn; + struct bna_tx *tx; + unsigned long flags; + + /* Initialize the Tx object configuration */ + tx_config->num_txq = bnad->num_txq_per_tx; + tx_config->txq_depth = bnad->txq_depth; + tx_config->tx_type = BNA_TX_T_REGULAR; + + /* Initialize the tx event handlers */ + tx_cbfn.tcb_setup_cbfn = bnad_cb_tcb_setup; + tx_cbfn.tcb_destroy_cbfn = bnad_cb_tcb_destroy; + tx_cbfn.tx_stall_cbfn = bnad_cb_tx_stall; + tx_cbfn.tx_resume_cbfn = bnad_cb_tx_resume; + tx_cbfn.tx_cleanup_cbfn = bnad_cb_tx_cleanup; + + /* Get BNA's resource requirement for one tx object */ + spin_lock_irqsave(&bnad->bna_lock, flags); + bna_tx_res_req(bnad->num_txq_per_tx, + bnad->txq_depth, res_info); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + /* Fill Unmap Q memory requirements */ + BNAD_FILL_UNMAPQ_MEM_REQ( + &res_info[BNA_TX_RES_MEM_T_UNMAPQ], + bnad->num_txq_per_tx, + BNAD_TX_UNMAPQ_DEPTH); + + /* Allocate resources */ + err = bnad_tx_res_alloc(bnad, res_info, tx_id); + if (err) + return err; + + /* Ask BNA to create one Tx object, supplying required resources */ + spin_lock_irqsave(&bnad->bna_lock, flags); + tx = bna_tx_create(&bnad->bna, bnad, tx_config, &tx_cbfn, res_info, + tx_info); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + if (!tx) + goto err_return; + tx_info->tx = tx; + + /* Register ISR for the Tx object */ + if (intr_info->intr_type == BNA_INTR_T_MSIX) { + err = bnad_tx_msix_register(bnad, tx_info, + tx_id, bnad->num_txq_per_tx); + if (err) + goto err_return; + } + + spin_lock_irqsave(&bnad->bna_lock, flags); + bna_tx_enable(tx); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + return 0; + +err_return: + bnad_tx_res_free(bnad, res_info); + return err; +} + +/* Setup the rx config for bna_rx_create */ +/* bnad decides the configuration */ +static void +bnad_init_rx_config(struct bnad *bnad, struct bna_rx_config *rx_config) +{ + rx_config->rx_type = BNA_RX_T_REGULAR; + rx_config->num_paths = bnad->num_rxp_per_rx; + + if (bnad->num_rxp_per_rx > 1) { + rx_config->rss_status = BNA_STATUS_T_ENABLED; + rx_config->rss_config.hash_type = + (BFI_RSS_T_V4_TCP | + BFI_RSS_T_V6_TCP | + BFI_RSS_T_V4_IP | + BFI_RSS_T_V6_IP); + rx_config->rss_config.hash_mask = + bnad->num_rxp_per_rx - 1; + get_random_bytes(rx_config->rss_config.toeplitz_hash_key, + sizeof(rx_config->rss_config.toeplitz_hash_key)); + } else { + rx_config->rss_status = BNA_STATUS_T_DISABLED; + memset(&rx_config->rss_config, 0, + sizeof(rx_config->rss_config)); + } + rx_config->rxp_type = BNA_RXP_SLR; + rx_config->q_depth = bnad->rxq_depth; + + rx_config->small_buff_size = BFI_SMALL_RXBUF_SIZE; + + rx_config->vlan_strip_status = BNA_STATUS_T_ENABLED; +} + +/* Called with mutex_lock(&bnad->conf_mutex) held */ +void +bnad_cleanup_rx(struct bnad *bnad, uint rx_id) +{ + struct bnad_rx_info *rx_info = &bnad->rx_info[rx_id]; + struct bna_rx_config *rx_config = &bnad->rx_config[rx_id]; + struct bna_res_info *res_info = &bnad->rx_res_info[rx_id].res_info[0]; + unsigned long flags; + int dim_timer_del = 0; + + if (!rx_info->rx) + return; + + if (0 == rx_id) { + spin_lock_irqsave(&bnad->bna_lock, flags); + dim_timer_del = bnad_dim_timer_running(bnad); + if (dim_timer_del) + clear_bit(BNAD_RF_DIM_TIMER_RUNNING, &bnad->run_flags); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + if (dim_timer_del) + del_timer_sync(&bnad->dim_timer); + } + + bnad_napi_disable(bnad, rx_id); + + init_completion(&bnad->bnad_completions.rx_comp); + spin_lock_irqsave(&bnad->bna_lock, flags); + bna_rx_disable(rx_info->rx, BNA_HARD_CLEANUP, bnad_cb_rx_disabled); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + wait_for_completion(&bnad->bnad_completions.rx_comp); + + if (rx_info->rx_ctrl[0].ccb->intr_type == BNA_INTR_T_MSIX) + bnad_rx_msix_unregister(bnad, rx_info, rx_config->num_paths); + + spin_lock_irqsave(&bnad->bna_lock, flags); + bna_rx_destroy(rx_info->rx); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + rx_info->rx = NULL; + + bnad_rx_res_free(bnad, res_info); +} + +/* Called with mutex_lock(&bnad->conf_mutex) held */ +int +bnad_setup_rx(struct bnad *bnad, uint rx_id) +{ + int err; + struct bnad_rx_info *rx_info = &bnad->rx_info[rx_id]; + struct bna_res_info *res_info = &bnad->rx_res_info[rx_id].res_info[0]; + struct bna_intr_info *intr_info = + &res_info[BNA_RX_RES_T_INTR].res_u.intr_info; + struct bna_rx_config *rx_config = &bnad->rx_config[rx_id]; + struct bna_rx_event_cbfn rx_cbfn; + struct bna_rx *rx; + unsigned long flags; + + /* Initialize the Rx object configuration */ + bnad_init_rx_config(bnad, rx_config); + + /* Initialize the Rx event handlers */ + rx_cbfn.rcb_setup_cbfn = bnad_cb_rcb_setup; + rx_cbfn.rcb_destroy_cbfn = NULL; + rx_cbfn.ccb_setup_cbfn = bnad_cb_ccb_setup; + rx_cbfn.ccb_destroy_cbfn = bnad_cb_ccb_destroy; + rx_cbfn.rx_cleanup_cbfn = bnad_cb_rx_cleanup; + rx_cbfn.rx_post_cbfn = bnad_cb_rx_post; + + /* Get BNA's resource requirement for one Rx object */ + spin_lock_irqsave(&bnad->bna_lock, flags); + bna_rx_res_req(rx_config, res_info); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + /* Fill Unmap Q memory requirements */ + BNAD_FILL_UNMAPQ_MEM_REQ( + &res_info[BNA_RX_RES_MEM_T_UNMAPQ], + rx_config->num_paths + + ((rx_config->rxp_type == BNA_RXP_SINGLE) ? 0 : + rx_config->num_paths), BNAD_RX_UNMAPQ_DEPTH); + + /* Allocate resource */ + err = bnad_rx_res_alloc(bnad, res_info, rx_id); + if (err) + return err; + + /* Ask BNA to create one Rx object, supplying required resources */ + spin_lock_irqsave(&bnad->bna_lock, flags); + rx = bna_rx_create(&bnad->bna, bnad, rx_config, &rx_cbfn, res_info, + rx_info); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + if (!rx) + goto err_return; + rx_info->rx = rx; + + /* Register ISR for the Rx object */ + if (intr_info->intr_type == BNA_INTR_T_MSIX) { + err = bnad_rx_msix_register(bnad, rx_info, rx_id, + rx_config->num_paths); + if (err) + goto err_return; + } + + /* Enable NAPI */ + bnad_napi_enable(bnad, rx_id); + + spin_lock_irqsave(&bnad->bna_lock, flags); + if (0 == rx_id) { + /* Set up Dynamic Interrupt Moderation Vector */ + if (bnad->cfg_flags & BNAD_CF_DIM_ENABLED) + bna_rx_dim_reconfig(&bnad->bna, bna_napi_dim_vector); + + /* Enable VLAN filtering only on the default Rx */ + bna_rx_vlanfilter_enable(rx); + + /* Start the DIM timer */ + bnad_dim_timer_start(bnad); + } + + bna_rx_enable(rx); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + return 0; + +err_return: + bnad_cleanup_rx(bnad, rx_id); + return err; +} + +/* Called with conf_lock & bnad->bna_lock held */ +void +bnad_tx_coalescing_timeo_set(struct bnad *bnad) +{ + struct bnad_tx_info *tx_info; + + tx_info = &bnad->tx_info[0]; + if (!tx_info->tx) + return; + + bna_tx_coalescing_timeo_set(tx_info->tx, bnad->tx_coalescing_timeo); +} + +/* Called with conf_lock & bnad->bna_lock held */ +void +bnad_rx_coalescing_timeo_set(struct bnad *bnad) +{ + struct bnad_rx_info *rx_info; + int i; + + for (i = 0; i < bnad->num_rx; i++) { + rx_info = &bnad->rx_info[i]; + if (!rx_info->rx) + continue; + bna_rx_coalescing_timeo_set(rx_info->rx, + bnad->rx_coalescing_timeo); + } +} + +/* + * Called with bnad->bna_lock held + */ +static int +bnad_mac_addr_set_locked(struct bnad *bnad, u8 *mac_addr) +{ + int ret; + + if (!is_valid_ether_addr(mac_addr)) + return -EADDRNOTAVAIL; + + /* If datapath is down, pretend everything went through */ + if (!bnad->rx_info[0].rx) + return 0; + + ret = bna_rx_ucast_set(bnad->rx_info[0].rx, mac_addr, NULL); + if (ret != BNA_CB_SUCCESS) + return -EADDRNOTAVAIL; + + return 0; +} + +/* Should be called with conf_lock held */ +static int +bnad_enable_default_bcast(struct bnad *bnad) +{ + struct bnad_rx_info *rx_info = &bnad->rx_info[0]; + int ret; + unsigned long flags; + + init_completion(&bnad->bnad_completions.mcast_comp); + + spin_lock_irqsave(&bnad->bna_lock, flags); + ret = bna_rx_mcast_add(rx_info->rx, (u8 *)bnad_bcast_addr, + bnad_cb_rx_mcast_add); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + if (ret == BNA_CB_SUCCESS) + wait_for_completion(&bnad->bnad_completions.mcast_comp); + else + return -ENODEV; + + if (bnad->bnad_completions.mcast_comp_status != BNA_CB_SUCCESS) + return -ENODEV; + + return 0; +} + +/* Statistics utilities */ +void +bnad_netdev_qstats_fill(struct bnad *bnad, struct rtnl_link_stats64 *stats) +{ + int i, j; + + for (i = 0; i < bnad->num_rx; i++) { + for (j = 0; j < bnad->num_rxp_per_rx; j++) { + if (bnad->rx_info[i].rx_ctrl[j].ccb) { + stats->rx_packets += bnad->rx_info[i]. + rx_ctrl[j].ccb->rcb[0]->rxq->rx_packets; + stats->rx_bytes += bnad->rx_info[i]. + rx_ctrl[j].ccb->rcb[0]->rxq->rx_bytes; + if (bnad->rx_info[i].rx_ctrl[j].ccb->rcb[1] && + bnad->rx_info[i].rx_ctrl[j].ccb-> + rcb[1]->rxq) { + stats->rx_packets += + bnad->rx_info[i].rx_ctrl[j]. + ccb->rcb[1]->rxq->rx_packets; + stats->rx_bytes += + bnad->rx_info[i].rx_ctrl[j]. + ccb->rcb[1]->rxq->rx_bytes; + } + } + } + } + for (i = 0; i < bnad->num_tx; i++) { + for (j = 0; j < bnad->num_txq_per_tx; j++) { + if (bnad->tx_info[i].tcb[j]) { + stats->tx_packets += + bnad->tx_info[i].tcb[j]->txq->tx_packets; + stats->tx_bytes += + bnad->tx_info[i].tcb[j]->txq->tx_bytes; + } + } + } +} + +/* + * Must be called with the bna_lock held. + */ +void +bnad_netdev_hwstats_fill(struct bnad *bnad, struct rtnl_link_stats64 *stats) +{ + struct bfi_ll_stats_mac *mac_stats; + u64 bmap; + int i; + + mac_stats = &bnad->stats.bna_stats->hw_stats->mac_stats; + stats->rx_errors = + mac_stats->rx_fcs_error + mac_stats->rx_alignment_error + + mac_stats->rx_frame_length_error + mac_stats->rx_code_error + + mac_stats->rx_undersize; + stats->tx_errors = mac_stats->tx_fcs_error + + mac_stats->tx_undersize; + stats->rx_dropped = mac_stats->rx_drop; + stats->tx_dropped = mac_stats->tx_drop; + stats->multicast = mac_stats->rx_multicast; + stats->collisions = mac_stats->tx_total_collision; + + stats->rx_length_errors = mac_stats->rx_frame_length_error; + + /* receive ring buffer overflow ?? */ + + stats->rx_crc_errors = mac_stats->rx_fcs_error; + stats->rx_frame_errors = mac_stats->rx_alignment_error; + /* recv'r fifo overrun */ + bmap = (u64)bnad->stats.bna_stats->rxf_bmap[0] | + ((u64)bnad->stats.bna_stats->rxf_bmap[1] << 32); + for (i = 0; bmap && (i < BFI_LL_RXF_ID_MAX); i++) { + if (bmap & 1) { + stats->rx_fifo_errors += + bnad->stats.bna_stats-> + hw_stats->rxf_stats[i].frame_drops; + break; + } + bmap >>= 1; + } +} + +static void +bnad_mbox_irq_sync(struct bnad *bnad) +{ + u32 irq; + unsigned long flags; + + spin_lock_irqsave(&bnad->bna_lock, flags); + if (bnad->cfg_flags & BNAD_CF_MSIX) + irq = bnad->msix_table[bnad->msix_num - 1].vector; + else + irq = bnad->pcidev->irq; + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + synchronize_irq(irq); +} + +/* Utility used by bnad_start_xmit, for doing TSO */ +static int +bnad_tso_prepare(struct bnad *bnad, struct sk_buff *skb) +{ + int err; + + /* SKB_GSO_TCPV4 and SKB_GSO_TCPV6 is defined since 2.6.18. */ + BUG_ON(!(skb_shinfo(skb)->gso_type == SKB_GSO_TCPV4 || + skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)); + if (skb_header_cloned(skb)) { + err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); + if (err) { + BNAD_UPDATE_CTR(bnad, tso_err); + return err; + } + } + + /* + * For TSO, the TCP checksum field is seeded with pseudo-header sum + * excluding the length field. + */ + if (skb->protocol == htons(ETH_P_IP)) { + struct iphdr *iph = ip_hdr(skb); + + /* Do we really need these? */ + iph->tot_len = 0; + iph->check = 0; + + tcp_hdr(skb)->check = + ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0, + IPPROTO_TCP, 0); + BNAD_UPDATE_CTR(bnad, tso4); + } else { + struct ipv6hdr *ipv6h = ipv6_hdr(skb); + + BUG_ON(!(skb->protocol == htons(ETH_P_IPV6))); + ipv6h->payload_len = 0; + tcp_hdr(skb)->check = + ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, 0, + IPPROTO_TCP, 0); + BNAD_UPDATE_CTR(bnad, tso6); + } + + return 0; +} + +/* + * Initialize Q numbers depending on Rx Paths + * Called with bnad->bna_lock held, because of cfg_flags + * access. + */ +static void +bnad_q_num_init(struct bnad *bnad) +{ + int rxps; + + rxps = min((uint)num_online_cpus(), + (uint)(BNAD_MAX_RXS * BNAD_MAX_RXPS_PER_RX)); + + if (!(bnad->cfg_flags & BNAD_CF_MSIX)) + rxps = 1; /* INTx */ + + bnad->num_rx = 1; + bnad->num_tx = 1; + bnad->num_rxp_per_rx = rxps; + bnad->num_txq_per_tx = BNAD_TXQ_NUM; +} + +/* + * Adjusts the Q numbers, given a number of msix vectors + * Give preference to RSS as opposed to Tx priority Queues, + * in such a case, just use 1 Tx Q + * Called with bnad->bna_lock held b'cos of cfg_flags access + */ +static void +bnad_q_num_adjust(struct bnad *bnad, int msix_vectors) +{ + bnad->num_txq_per_tx = 1; + if ((msix_vectors >= (bnad->num_tx * bnad->num_txq_per_tx) + + bnad_rxqs_per_cq + BNAD_MAILBOX_MSIX_VECTORS) && + (bnad->cfg_flags & BNAD_CF_MSIX)) { + bnad->num_rxp_per_rx = msix_vectors - + (bnad->num_tx * bnad->num_txq_per_tx) - + BNAD_MAILBOX_MSIX_VECTORS; + } else + bnad->num_rxp_per_rx = 1; +} + +static void +bnad_set_netdev_perm_addr(struct bnad *bnad) +{ + struct net_device *netdev = bnad->netdev; + + memcpy(netdev->perm_addr, &bnad->perm_addr, netdev->addr_len); + if (is_zero_ether_addr(netdev->dev_addr)) + memcpy(netdev->dev_addr, &bnad->perm_addr, netdev->addr_len); +} + +/* Enable / disable device */ +static void +bnad_device_disable(struct bnad *bnad) +{ + unsigned long flags; + + init_completion(&bnad->bnad_completions.ioc_comp); + + spin_lock_irqsave(&bnad->bna_lock, flags); + bna_device_disable(&bnad->bna.device, BNA_HARD_CLEANUP); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + wait_for_completion(&bnad->bnad_completions.ioc_comp); +} + +static int +bnad_device_enable(struct bnad *bnad) +{ + int err = 0; + unsigned long flags; + + init_completion(&bnad->bnad_completions.ioc_comp); + + spin_lock_irqsave(&bnad->bna_lock, flags); + bna_device_enable(&bnad->bna.device); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + wait_for_completion(&bnad->bnad_completions.ioc_comp); + + if (bnad->bnad_completions.ioc_comp_status) + err = bnad->bnad_completions.ioc_comp_status; + + return err; +} + +/* Free BNA resources */ +static void +bnad_res_free(struct bnad *bnad) +{ + int i; + struct bna_res_info *res_info = &bnad->res_info[0]; + + for (i = 0; i < BNA_RES_T_MAX; i++) { + if (res_info[i].res_type == BNA_RES_T_MEM) + bnad_mem_free(bnad, &res_info[i].res_u.mem_info); + else + bnad_mbox_irq_free(bnad, &res_info[i].res_u.intr_info); + } +} + +/* Allocates memory and interrupt resources for BNA */ +static int +bnad_res_alloc(struct bnad *bnad) +{ + int i, err; + struct bna_res_info *res_info = &bnad->res_info[0]; + + for (i = 0; i < BNA_RES_T_MAX; i++) { + if (res_info[i].res_type == BNA_RES_T_MEM) + err = bnad_mem_alloc(bnad, &res_info[i].res_u.mem_info); + else + err = bnad_mbox_irq_alloc(bnad, + &res_info[i].res_u.intr_info); + if (err) + goto err_return; + } + return 0; + +err_return: + bnad_res_free(bnad); + return err; +} + +/* Interrupt enable / disable */ +static void +bnad_enable_msix(struct bnad *bnad) +{ + int i, ret; + unsigned long flags; + + spin_lock_irqsave(&bnad->bna_lock, flags); + if (!(bnad->cfg_flags & BNAD_CF_MSIX)) { + spin_unlock_irqrestore(&bnad->bna_lock, flags); + return; + } + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + if (bnad->msix_table) + return; + + bnad->msix_table = + kcalloc(bnad->msix_num, sizeof(struct msix_entry), GFP_KERNEL); + + if (!bnad->msix_table) + goto intx_mode; + + for (i = 0; i < bnad->msix_num; i++) + bnad->msix_table[i].entry = i; + + ret = pci_enable_msix(bnad->pcidev, bnad->msix_table, bnad->msix_num); + if (ret > 0) { + /* Not enough MSI-X vectors. */ + + spin_lock_irqsave(&bnad->bna_lock, flags); + /* ret = #of vectors that we got */ + bnad_q_num_adjust(bnad, ret); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + bnad->msix_num = (bnad->num_tx * bnad->num_txq_per_tx) + + (bnad->num_rx + * bnad->num_rxp_per_rx) + + BNAD_MAILBOX_MSIX_VECTORS; + + /* Try once more with adjusted numbers */ + /* If this fails, fall back to INTx */ + ret = pci_enable_msix(bnad->pcidev, bnad->msix_table, + bnad->msix_num); + if (ret) + goto intx_mode; + + } else if (ret < 0) + goto intx_mode; + return; + +intx_mode: + + kfree(bnad->msix_table); + bnad->msix_table = NULL; + bnad->msix_num = 0; + spin_lock_irqsave(&bnad->bna_lock, flags); + bnad->cfg_flags &= ~BNAD_CF_MSIX; + bnad_q_num_init(bnad); + spin_unlock_irqrestore(&bnad->bna_lock, flags); +} + +static void +bnad_disable_msix(struct bnad *bnad) +{ + u32 cfg_flags; + unsigned long flags; + + spin_lock_irqsave(&bnad->bna_lock, flags); + cfg_flags = bnad->cfg_flags; + if (bnad->cfg_flags & BNAD_CF_MSIX) + bnad->cfg_flags &= ~BNAD_CF_MSIX; + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + if (cfg_flags & BNAD_CF_MSIX) { + pci_disable_msix(bnad->pcidev); + kfree(bnad->msix_table); + bnad->msix_table = NULL; + } +} + +/* Netdev entry points */ +static int +bnad_open(struct net_device *netdev) +{ + int err; + struct bnad *bnad = netdev_priv(netdev); + struct bna_pause_config pause_config; + int mtu; + unsigned long flags; + + mutex_lock(&bnad->conf_mutex); + + /* Tx */ + err = bnad_setup_tx(bnad, 0); + if (err) + goto err_return; + + /* Rx */ + err = bnad_setup_rx(bnad, 0); + if (err) + goto cleanup_tx; + + /* Port */ + pause_config.tx_pause = 0; + pause_config.rx_pause = 0; + + mtu = ETH_HLEN + bnad->netdev->mtu + ETH_FCS_LEN; + + spin_lock_irqsave(&bnad->bna_lock, flags); + bna_port_mtu_set(&bnad->bna.port, mtu, NULL); + bna_port_pause_config(&bnad->bna.port, &pause_config, NULL); + bna_port_enable(&bnad->bna.port); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + /* Enable broadcast */ + bnad_enable_default_bcast(bnad); + + /* Set the UCAST address */ + spin_lock_irqsave(&bnad->bna_lock, flags); + bnad_mac_addr_set_locked(bnad, netdev->dev_addr); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + /* Start the stats timer */ + bnad_stats_timer_start(bnad); + + mutex_unlock(&bnad->conf_mutex); + + return 0; + +cleanup_tx: + bnad_cleanup_tx(bnad, 0); + +err_return: + mutex_unlock(&bnad->conf_mutex); + return err; +} + +static int +bnad_stop(struct net_device *netdev) +{ + struct bnad *bnad = netdev_priv(netdev); + unsigned long flags; + + mutex_lock(&bnad->conf_mutex); + + /* Stop the stats timer */ + bnad_stats_timer_stop(bnad); + + init_completion(&bnad->bnad_completions.port_comp); + + spin_lock_irqsave(&bnad->bna_lock, flags); + bna_port_disable(&bnad->bna.port, BNA_HARD_CLEANUP, + bnad_cb_port_disabled); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + wait_for_completion(&bnad->bnad_completions.port_comp); + + bnad_cleanup_tx(bnad, 0); + bnad_cleanup_rx(bnad, 0); + + /* Synchronize mailbox IRQ */ + bnad_mbox_irq_sync(bnad); + + mutex_unlock(&bnad->conf_mutex); + + return 0; +} + +/* TX */ +/* + * bnad_start_xmit : Netdev entry point for Transmit + * Called under lock held by net_device + */ +static netdev_tx_t +bnad_start_xmit(struct sk_buff *skb, struct net_device *netdev) +{ + struct bnad *bnad = netdev_priv(netdev); + + u16 txq_prod, vlan_tag = 0; + u32 unmap_prod, wis, wis_used, wi_range; + u32 vectors, vect_id, i, acked; + u32 tx_id; + int err; + + struct bnad_tx_info *tx_info; + struct bna_tcb *tcb; + struct bnad_unmap_q *unmap_q; + dma_addr_t dma_addr; + struct bna_txq_entry *txqent; + bna_txq_wi_ctrl_flag_t flags; + + if (unlikely + (skb->len <= ETH_HLEN || skb->len > BFI_TX_MAX_DATA_PER_PKT)) { + dev_kfree_skb(skb); + return NETDEV_TX_OK; + } + + /* + * Takes care of the Tx that is scheduled between clearing the flag + * and the netif_stop_queue() call. + */ + if (unlikely(!test_bit(BNAD_RF_TX_STARTED, &bnad->run_flags))) { + dev_kfree_skb(skb); + return NETDEV_TX_OK; + } + + tx_id = 0; + + tx_info = &bnad->tx_info[tx_id]; + tcb = tx_info->tcb[tx_id]; + unmap_q = tcb->unmap_q; + + vectors = 1 + skb_shinfo(skb)->nr_frags; + if (vectors > BFI_TX_MAX_VECTORS_PER_PKT) { + dev_kfree_skb(skb); + return NETDEV_TX_OK; + } + wis = BNA_TXQ_WI_NEEDED(vectors); /* 4 vectors per work item */ + acked = 0; + if (unlikely + (wis > BNA_QE_FREE_CNT(tcb, tcb->q_depth) || + vectors > BNA_QE_FREE_CNT(unmap_q, unmap_q->q_depth))) { + if ((u16) (*tcb->hw_consumer_index) != + tcb->consumer_index && + !test_and_set_bit(BNAD_TXQ_FREE_SENT, &tcb->flags)) { + acked = bnad_free_txbufs(bnad, tcb); + bna_ib_ack(tcb->i_dbell, acked); + smp_mb__before_clear_bit(); + clear_bit(BNAD_TXQ_FREE_SENT, &tcb->flags); + } else { + netif_stop_queue(netdev); + BNAD_UPDATE_CTR(bnad, netif_queue_stop); + } + + smp_mb(); + /* + * Check again to deal with race condition between + * netif_stop_queue here, and netif_wake_queue in + * interrupt handler which is not inside netif tx lock. + */ + if (likely + (wis > BNA_QE_FREE_CNT(tcb, tcb->q_depth) || + vectors > BNA_QE_FREE_CNT(unmap_q, unmap_q->q_depth))) { + BNAD_UPDATE_CTR(bnad, netif_queue_stop); + return NETDEV_TX_BUSY; + } else { + netif_wake_queue(netdev); + BNAD_UPDATE_CTR(bnad, netif_queue_wakeup); + } + } + + unmap_prod = unmap_q->producer_index; + wis_used = 1; + vect_id = 0; + flags = 0; + + txq_prod = tcb->producer_index; + BNA_TXQ_QPGE_PTR_GET(txq_prod, tcb->sw_qpt, txqent, wi_range); + BUG_ON(!(wi_range <= tcb->q_depth)); + txqent->hdr.wi.reserved = 0; + txqent->hdr.wi.num_vectors = vectors; + txqent->hdr.wi.opcode = + htons((skb_is_gso(skb) ? BNA_TXQ_WI_SEND_LSO : + BNA_TXQ_WI_SEND)); + + if (vlan_tx_tag_present(skb)) { + vlan_tag = (u16) vlan_tx_tag_get(skb); + flags |= (BNA_TXQ_WI_CF_INS_PRIO | BNA_TXQ_WI_CF_INS_VLAN); + } + if (test_bit(BNAD_RF_CEE_RUNNING, &bnad->run_flags)) { + vlan_tag = + (tcb->priority & 0x7) << 13 | (vlan_tag & 0x1fff); + flags |= (BNA_TXQ_WI_CF_INS_PRIO | BNA_TXQ_WI_CF_INS_VLAN); + } + + txqent->hdr.wi.vlan_tag = htons(vlan_tag); + + if (skb_is_gso(skb)) { + err = bnad_tso_prepare(bnad, skb); + if (err) { + dev_kfree_skb(skb); + return NETDEV_TX_OK; + } + txqent->hdr.wi.lso_mss = htons(skb_is_gso(skb)); + flags |= (BNA_TXQ_WI_CF_IP_CKSUM | BNA_TXQ_WI_CF_TCP_CKSUM); + txqent->hdr.wi.l4_hdr_size_n_offset = + htons(BNA_TXQ_WI_L4_HDR_N_OFFSET + (tcp_hdrlen(skb) >> 2, + skb_transport_offset(skb))); + } else if (skb->ip_summed == CHECKSUM_PARTIAL) { + u8 proto = 0; + + txqent->hdr.wi.lso_mss = 0; + + if (skb->protocol == htons(ETH_P_IP)) + proto = ip_hdr(skb)->protocol; + else if (skb->protocol == htons(ETH_P_IPV6)) { + /* nexthdr may not be TCP immediately. */ + proto = ipv6_hdr(skb)->nexthdr; + } + if (proto == IPPROTO_TCP) { + flags |= BNA_TXQ_WI_CF_TCP_CKSUM; + txqent->hdr.wi.l4_hdr_size_n_offset = + htons(BNA_TXQ_WI_L4_HDR_N_OFFSET + (0, skb_transport_offset(skb))); + + BNAD_UPDATE_CTR(bnad, tcpcsum_offload); + + BUG_ON(!(skb_headlen(skb) >= + skb_transport_offset(skb) + tcp_hdrlen(skb))); + + } else if (proto == IPPROTO_UDP) { + flags |= BNA_TXQ_WI_CF_UDP_CKSUM; + txqent->hdr.wi.l4_hdr_size_n_offset = + htons(BNA_TXQ_WI_L4_HDR_N_OFFSET + (0, skb_transport_offset(skb))); + + BNAD_UPDATE_CTR(bnad, udpcsum_offload); + + BUG_ON(!(skb_headlen(skb) >= + skb_transport_offset(skb) + + sizeof(struct udphdr))); + } else { + err = skb_checksum_help(skb); + BNAD_UPDATE_CTR(bnad, csum_help); + if (err) { + dev_kfree_skb(skb); + BNAD_UPDATE_CTR(bnad, csum_help_err); + return NETDEV_TX_OK; + } + } + } else { + txqent->hdr.wi.lso_mss = 0; + txqent->hdr.wi.l4_hdr_size_n_offset = 0; + } + + txqent->hdr.wi.flags = htons(flags); + + txqent->hdr.wi.frame_length = htonl(skb->len); + + unmap_q->unmap_array[unmap_prod].skb = skb; + BUG_ON(!(skb_headlen(skb) <= BFI_TX_MAX_DATA_PER_VECTOR)); + txqent->vector[vect_id].length = htons(skb_headlen(skb)); + dma_addr = pci_map_single(bnad->pcidev, skb->data, skb_headlen(skb), + PCI_DMA_TODEVICE); + pci_unmap_addr_set(&unmap_q->unmap_array[unmap_prod], dma_addr, + dma_addr); + + BNA_SET_DMA_ADDR(dma_addr, &txqent->vector[vect_id].host_addr); + BNA_QE_INDX_ADD(unmap_prod, 1, unmap_q->q_depth); + + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { + struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i]; + u32 size = frag->size; + + if (++vect_id == BFI_TX_MAX_VECTORS_PER_WI) { + vect_id = 0; + if (--wi_range) + txqent++; + else { + BNA_QE_INDX_ADD(txq_prod, wis_used, + tcb->q_depth); + wis_used = 0; + BNA_TXQ_QPGE_PTR_GET(txq_prod, tcb->sw_qpt, + txqent, wi_range); + BUG_ON(!(wi_range <= tcb->q_depth)); + } + wis_used++; + txqent->hdr.wi_ext.opcode = htons(BNA_TXQ_WI_EXTENSION); + } + + BUG_ON(!(size <= BFI_TX_MAX_DATA_PER_VECTOR)); + txqent->vector[vect_id].length = htons(size); + dma_addr = + pci_map_page(bnad->pcidev, frag->page, + frag->page_offset, size, + PCI_DMA_TODEVICE); + pci_unmap_addr_set(&unmap_q->unmap_array[unmap_prod], dma_addr, + dma_addr); + BNA_SET_DMA_ADDR(dma_addr, &txqent->vector[vect_id].host_addr); + BNA_QE_INDX_ADD(unmap_prod, 1, unmap_q->q_depth); + } + + unmap_q->producer_index = unmap_prod; + BNA_QE_INDX_ADD(txq_prod, wis_used, tcb->q_depth); + tcb->producer_index = txq_prod; + + smp_mb(); + bna_txq_prod_indx_doorbell(tcb); + + if ((u16) (*tcb->hw_consumer_index) != tcb->consumer_index) + tasklet_schedule(&bnad->tx_free_tasklet); + + return NETDEV_TX_OK; +} + +/* + * Used spin_lock to synchronize reading of stats structures, which + * is written by BNA under the same lock. + */ +static struct rtnl_link_stats64 * +bnad_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats) +{ + struct bnad *bnad = netdev_priv(netdev); + unsigned long flags; + + spin_lock_irqsave(&bnad->bna_lock, flags); + + bnad_netdev_qstats_fill(bnad, stats); + bnad_netdev_hwstats_fill(bnad, stats); + + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + return stats; +} + +static void +bnad_set_rx_mode(struct net_device *netdev) +{ + struct bnad *bnad = netdev_priv(netdev); + u32 new_mask, valid_mask; + unsigned long flags; + + spin_lock_irqsave(&bnad->bna_lock, flags); + + new_mask = valid_mask = 0; + + if (netdev->flags & IFF_PROMISC) { + if (!(bnad->cfg_flags & BNAD_CF_PROMISC)) { + new_mask = BNAD_RXMODE_PROMISC_DEFAULT; + valid_mask = BNAD_RXMODE_PROMISC_DEFAULT; + bnad->cfg_flags |= BNAD_CF_PROMISC; + } + } else { + if (bnad->cfg_flags & BNAD_CF_PROMISC) { + new_mask = ~BNAD_RXMODE_PROMISC_DEFAULT; + valid_mask = BNAD_RXMODE_PROMISC_DEFAULT; + bnad->cfg_flags &= ~BNAD_CF_PROMISC; + } + } + + if (netdev->flags & IFF_ALLMULTI) { + if (!(bnad->cfg_flags & BNAD_CF_ALLMULTI)) { + new_mask |= BNA_RXMODE_ALLMULTI; + valid_mask |= BNA_RXMODE_ALLMULTI; + bnad->cfg_flags |= BNAD_CF_ALLMULTI; + } + } else { + if (bnad->cfg_flags & BNAD_CF_ALLMULTI) { + new_mask &= ~BNA_RXMODE_ALLMULTI; + valid_mask |= BNA_RXMODE_ALLMULTI; + bnad->cfg_flags &= ~BNAD_CF_ALLMULTI; + } + } + + bna_rx_mode_set(bnad->rx_info[0].rx, new_mask, valid_mask, NULL); + + if (!netdev_mc_empty(netdev)) { + u8 *mcaddr_list; + int mc_count = netdev_mc_count(netdev); + + /* Index 0 holds the broadcast address */ + mcaddr_list = + kzalloc((mc_count + 1) * ETH_ALEN, + GFP_ATOMIC); + if (!mcaddr_list) + goto unlock; + + memcpy(&mcaddr_list[0], &bnad_bcast_addr[0], ETH_ALEN); + + /* Copy rest of the MC addresses */ + bnad_netdev_mc_list_get(netdev, mcaddr_list); + + bna_rx_mcast_listset(bnad->rx_info[0].rx, mc_count + 1, + mcaddr_list, NULL); + + /* Should we enable BNAD_CF_ALLMULTI for err != 0 ? */ + kfree(mcaddr_list); + } +unlock: + spin_unlock_irqrestore(&bnad->bna_lock, flags); +} + +/* + * bna_lock is used to sync writes to netdev->addr + * conf_lock cannot be used since this call may be made + * in a non-blocking context. + */ +static int +bnad_set_mac_address(struct net_device *netdev, void *mac_addr) +{ + int err; + struct bnad *bnad = netdev_priv(netdev); + struct sockaddr *sa = (struct sockaddr *)mac_addr; + unsigned long flags; + + spin_lock_irqsave(&bnad->bna_lock, flags); + + err = bnad_mac_addr_set_locked(bnad, sa->sa_data); + + if (!err) + memcpy(netdev->dev_addr, sa->sa_data, netdev->addr_len); + + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + return err; +} + +static int +bnad_change_mtu(struct net_device *netdev, int new_mtu) +{ + int mtu, err = 0; + unsigned long flags; + + struct bnad *bnad = netdev_priv(netdev); + + if (new_mtu + ETH_HLEN < ETH_ZLEN || new_mtu > BNAD_JUMBO_MTU) + return -EINVAL; + + mutex_lock(&bnad->conf_mutex); + + netdev->mtu = new_mtu; + + mtu = ETH_HLEN + new_mtu + ETH_FCS_LEN; + + spin_lock_irqsave(&bnad->bna_lock, flags); + bna_port_mtu_set(&bnad->bna.port, mtu, NULL); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + mutex_unlock(&bnad->conf_mutex); + return err; +} + +static void +bnad_vlan_rx_register(struct net_device *netdev, + struct vlan_group *vlan_grp) +{ + struct bnad *bnad = netdev_priv(netdev); + + mutex_lock(&bnad->conf_mutex); + bnad->vlan_grp = vlan_grp; + mutex_unlock(&bnad->conf_mutex); +} + +static void +bnad_vlan_rx_add_vid(struct net_device *netdev, + unsigned short vid) +{ + struct bnad *bnad = netdev_priv(netdev); + unsigned long flags; + + if (!bnad->rx_info[0].rx) + return; + + mutex_lock(&bnad->conf_mutex); + + spin_lock_irqsave(&bnad->bna_lock, flags); + bna_rx_vlan_add(bnad->rx_info[0].rx, vid); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + mutex_unlock(&bnad->conf_mutex); +} + +static void +bnad_vlan_rx_kill_vid(struct net_device *netdev, + unsigned short vid) +{ + struct bnad *bnad = netdev_priv(netdev); + unsigned long flags; + + if (!bnad->rx_info[0].rx) + return; + + mutex_lock(&bnad->conf_mutex); + + spin_lock_irqsave(&bnad->bna_lock, flags); + bna_rx_vlan_del(bnad->rx_info[0].rx, vid); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + mutex_unlock(&bnad->conf_mutex); +} + +#ifdef CONFIG_NET_POLL_CONTROLLER +static void +bnad_netpoll(struct net_device *netdev) +{ + struct bnad *bnad = netdev_priv(netdev); + struct bnad_rx_info *rx_info; + struct bnad_rx_ctrl *rx_ctrl; + u32 curr_mask; + int i, j; + + if (!(bnad->cfg_flags & BNAD_CF_MSIX)) { + bna_intx_disable(&bnad->bna, curr_mask); + bnad_isr(bnad->pcidev->irq, netdev); + bna_intx_enable(&bnad->bna, curr_mask); + } else { + for (i = 0; i < bnad->num_rx; i++) { + rx_info = &bnad->rx_info[i]; + if (!rx_info->rx) + continue; + for (j = 0; j < bnad->num_rxp_per_rx; j++) { + rx_ctrl = &rx_info->rx_ctrl[j]; + if (rx_ctrl->ccb) { + bnad_disable_rx_irq(bnad, + rx_ctrl->ccb); + bnad_netif_rx_schedule_poll(bnad, + rx_ctrl->ccb); + } + } + } + } +} +#endif + +static const struct net_device_ops bnad_netdev_ops = { + .ndo_open = bnad_open, + .ndo_stop = bnad_stop, + .ndo_start_xmit = bnad_start_xmit, + .ndo_get_stats64 = bnad_get_stats64, + .ndo_set_rx_mode = bnad_set_rx_mode, + .ndo_set_multicast_list = bnad_set_rx_mode, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = bnad_set_mac_address, + .ndo_change_mtu = bnad_change_mtu, + .ndo_vlan_rx_register = bnad_vlan_rx_register, + .ndo_vlan_rx_add_vid = bnad_vlan_rx_add_vid, + .ndo_vlan_rx_kill_vid = bnad_vlan_rx_kill_vid, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = bnad_netpoll +#endif +}; + +static void +bnad_netdev_init(struct bnad *bnad, bool using_dac) +{ + struct net_device *netdev = bnad->netdev; + + netdev->features |= NETIF_F_IPV6_CSUM; + netdev->features |= NETIF_F_TSO; + netdev->features |= NETIF_F_TSO6; + + netdev->features |= NETIF_F_GRO; + pr_warn("bna: GRO enabled, using kernel stack GRO\n"); + + netdev->features |= NETIF_F_SG | NETIF_F_IP_CSUM; + + if (using_dac) + netdev->features |= NETIF_F_HIGHDMA; + + netdev->features |= + NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX | + NETIF_F_HW_VLAN_FILTER; + + netdev->vlan_features = netdev->features; + netdev->mem_start = bnad->mmio_start; + netdev->mem_end = bnad->mmio_start + bnad->mmio_len - 1; + + netdev->netdev_ops = &bnad_netdev_ops; + bnad_set_ethtool_ops(netdev); +} + +/* + * 1. Initialize the bnad structure + * 2. Setup netdev pointer in pci_dev + * 3. Initialze Tx free tasklet + * 4. Initialize no. of TxQ & CQs & MSIX vectors + */ +static int +bnad_init(struct bnad *bnad, + struct pci_dev *pdev, struct net_device *netdev) +{ + unsigned long flags; + + SET_NETDEV_DEV(netdev, &pdev->dev); + pci_set_drvdata(pdev, netdev); + + bnad->netdev = netdev; + bnad->pcidev = pdev; + bnad->mmio_start = pci_resource_start(pdev, 0); + bnad->mmio_len = pci_resource_len(pdev, 0); + bnad->bar0 = ioremap_nocache(bnad->mmio_start, bnad->mmio_len); + if (!bnad->bar0) { + dev_err(&pdev->dev, "ioremap for bar0 failed\n"); + pci_set_drvdata(pdev, NULL); + return -ENOMEM; + } + pr_info("bar0 mapped to %p, len %llu\n", bnad->bar0, + (unsigned long long) bnad->mmio_len); + + spin_lock_irqsave(&bnad->bna_lock, flags); + if (!bnad_msix_disable) + bnad->cfg_flags = BNAD_CF_MSIX; + + bnad->cfg_flags |= BNAD_CF_DIM_ENABLED; + + bnad_q_num_init(bnad); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + bnad->msix_num = (bnad->num_tx * bnad->num_txq_per_tx) + + (bnad->num_rx * bnad->num_rxp_per_rx) + + BNAD_MAILBOX_MSIX_VECTORS; + + bnad->txq_depth = BNAD_TXQ_DEPTH; + bnad->rxq_depth = BNAD_RXQ_DEPTH; + bnad->rx_csum = true; + + bnad->tx_coalescing_timeo = BFI_TX_COALESCING_TIMEO; + bnad->rx_coalescing_timeo = BFI_RX_COALESCING_TIMEO; + + tasklet_init(&bnad->tx_free_tasklet, bnad_tx_free_tasklet, + (unsigned long)bnad); + + return 0; +} + +/* + * Must be called after bnad_pci_uninit() + * so that iounmap() and pci_set_drvdata(NULL) + * happens only after PCI uninitialization. + */ +static void +bnad_uninit(struct bnad *bnad) +{ + if (bnad->bar0) + iounmap(bnad->bar0); + pci_set_drvdata(bnad->pcidev, NULL); +} + +/* + * Initialize locks + a) Per device mutes used for serializing configuration + changes from OS interface + b) spin lock used to protect bna state machine + */ +static void +bnad_lock_init(struct bnad *bnad) +{ + spin_lock_init(&bnad->bna_lock); + mutex_init(&bnad->conf_mutex); +} + +static void +bnad_lock_uninit(struct bnad *bnad) +{ + mutex_destroy(&bnad->conf_mutex); +} + +/* PCI Initialization */ +static int +bnad_pci_init(struct bnad *bnad, + struct pci_dev *pdev, bool *using_dac) +{ + int err; + + err = pci_enable_device(pdev); + if (err) + return err; + err = pci_request_regions(pdev, BNAD_NAME); + if (err) + goto disable_device; + if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) && + !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) { + *using_dac = 1; + } else { + err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); + if (err) { + err = pci_set_consistent_dma_mask(pdev, + DMA_BIT_MASK(32)); + if (err) + goto release_regions; + } + *using_dac = 0; + } + pci_set_master(pdev); + return 0; + +release_regions: + pci_release_regions(pdev); +disable_device: + pci_disable_device(pdev); + + return err; +} + +static void +bnad_pci_uninit(struct pci_dev *pdev) +{ + pci_release_regions(pdev); + pci_disable_device(pdev); +} + +static int __devinit +bnad_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *pcidev_id) +{ + bool using_dac; + int err; + struct bnad *bnad; + struct bna *bna; + struct net_device *netdev; + struct bfa_pcidev pcidev_info; + unsigned long flags; + + pr_info("bnad_pci_probe : (0x%p, 0x%p) PCI Func : (%d)\n", + pdev, pcidev_id, PCI_FUNC(pdev->devfn)); + + mutex_lock(&bnad_fwimg_mutex); + if (!cna_get_firmware_buf(pdev)) { + mutex_unlock(&bnad_fwimg_mutex); + pr_warn("Failed to load Firmware Image!\n"); + return -ENODEV; + } + mutex_unlock(&bnad_fwimg_mutex); + + /* + * Allocates sizeof(struct net_device + struct bnad) + * bnad = netdev->priv + */ + netdev = alloc_etherdev(sizeof(struct bnad)); + if (!netdev) { + dev_err(&pdev->dev, "alloc_etherdev failed\n"); + err = -ENOMEM; + return err; + } + bnad = netdev_priv(netdev); + + /* + * PCI initialization + * Output : using_dac = 1 for 64 bit DMA + * = 0 for 32 bit DMA + */ + err = bnad_pci_init(bnad, pdev, &using_dac); + if (err) + goto free_netdev; + + bnad_lock_init(bnad); + /* + * Initialize bnad structure + * Setup relation between pci_dev & netdev + * Init Tx free tasklet + */ + err = bnad_init(bnad, pdev, netdev); + if (err) + goto pci_uninit; + /* Initialize netdev structure, set up ethtool ops */ + bnad_netdev_init(bnad, using_dac); + + bnad_enable_msix(bnad); + + /* Get resource requirement form bna */ + bna_res_req(&bnad->res_info[0]); + + /* Allocate resources from bna */ + err = bnad_res_alloc(bnad); + if (err) + goto free_netdev; + + bna = &bnad->bna; + + /* Setup pcidev_info for bna_init() */ + pcidev_info.pci_slot = PCI_SLOT(bnad->pcidev->devfn); + pcidev_info.pci_func = PCI_FUNC(bnad->pcidev->devfn); + pcidev_info.device_id = bnad->pcidev->device; + pcidev_info.pci_bar_kva = bnad->bar0; + + mutex_lock(&bnad->conf_mutex); + + spin_lock_irqsave(&bnad->bna_lock, flags); + bna_init(bna, bnad, &pcidev_info, &bnad->res_info[0]); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + bnad->stats.bna_stats = &bna->stats; + + /* Set up timers */ + setup_timer(&bnad->bna.device.ioc.ioc_timer, bnad_ioc_timeout, + ((unsigned long)bnad)); + setup_timer(&bnad->bna.device.ioc.hb_timer, bnad_ioc_hb_check, + ((unsigned long)bnad)); + setup_timer(&bnad->bna.device.ioc.sem_timer, bnad_ioc_sem_timeout, + ((unsigned long)bnad)); + + /* Now start the timer before calling IOC */ + mod_timer(&bnad->bna.device.ioc.ioc_timer, + jiffies + msecs_to_jiffies(BNA_IOC_TIMER_FREQ)); + + /* + * Start the chip + * Don't care even if err != 0, bna state machine will + * deal with it + */ + err = bnad_device_enable(bnad); + + /* Get the burnt-in mac */ + spin_lock_irqsave(&bnad->bna_lock, flags); + bna_port_mac_get(&bna->port, &bnad->perm_addr); + bnad_set_netdev_perm_addr(bnad); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + mutex_unlock(&bnad->conf_mutex); + + /* + * Make sure the link appears down to the stack + */ + netif_carrier_off(netdev); + + /* Finally, reguister with net_device layer */ + err = register_netdev(netdev); + if (err) { + pr_err("BNA : Registering with netdev failed\n"); + goto disable_device; + } + + return 0; + +disable_device: + mutex_lock(&bnad->conf_mutex); + bnad_device_disable(bnad); + del_timer_sync(&bnad->bna.device.ioc.ioc_timer); + del_timer_sync(&bnad->bna.device.ioc.sem_timer); + del_timer_sync(&bnad->bna.device.ioc.hb_timer); + spin_lock_irqsave(&bnad->bna_lock, flags); + bna_uninit(bna); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + mutex_unlock(&bnad->conf_mutex); + + bnad_res_free(bnad); + bnad_disable_msix(bnad); +pci_uninit: + bnad_pci_uninit(pdev); + bnad_lock_uninit(bnad); + bnad_uninit(bnad); +free_netdev: + free_netdev(netdev); + return err; +} + +static void __devexit +bnad_pci_remove(struct pci_dev *pdev) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct bnad *bnad; + struct bna *bna; + unsigned long flags; + + if (!netdev) + return; + + pr_info("%s bnad_pci_remove\n", netdev->name); + bnad = netdev_priv(netdev); + bna = &bnad->bna; + + unregister_netdev(netdev); + + mutex_lock(&bnad->conf_mutex); + bnad_device_disable(bnad); + del_timer_sync(&bnad->bna.device.ioc.ioc_timer); + del_timer_sync(&bnad->bna.device.ioc.sem_timer); + del_timer_sync(&bnad->bna.device.ioc.hb_timer); + spin_lock_irqsave(&bnad->bna_lock, flags); + bna_uninit(bna); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + mutex_unlock(&bnad->conf_mutex); + + bnad_res_free(bnad); + bnad_disable_msix(bnad); + bnad_pci_uninit(pdev); + bnad_lock_uninit(bnad); + bnad_uninit(bnad); + free_netdev(netdev); +} + +static const struct pci_device_id bnad_pci_id_table[] = { + { + PCI_DEVICE(PCI_VENDOR_ID_BROCADE, + PCI_DEVICE_ID_BROCADE_CT), + .class = PCI_CLASS_NETWORK_ETHERNET << 8, + .class_mask = 0xffff00 + }, {0, } +}; + +MODULE_DEVICE_TABLE(pci, bnad_pci_id_table); + +static struct pci_driver bnad_pci_driver = { + .name = BNAD_NAME, + .id_table = bnad_pci_id_table, + .probe = bnad_pci_probe, + .remove = __devexit_p(bnad_pci_remove), +}; + +static int __init +bnad_module_init(void) +{ + int err; + + pr_info("Brocade 10G Ethernet driver\n"); + + bfa_nw_ioc_auto_recover(bnad_ioc_auto_recover); + + err = pci_register_driver(&bnad_pci_driver); + if (err < 0) { + pr_err("bna : PCI registration failed in module init " + "(%d)\n", err); + return err; + } + + return 0; +} + +static void __exit +bnad_module_exit(void) +{ + pci_unregister_driver(&bnad_pci_driver); + + if (bfi_fw) + release_firmware(bfi_fw); +} + +module_init(bnad_module_init); +module_exit(bnad_module_exit); + +MODULE_AUTHOR("Brocade"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Brocade 10G PCIe Ethernet driver"); +MODULE_VERSION(BNAD_VERSION); +MODULE_FIRMWARE(CNA_FW_FILE_CT); |
