diff options
Diffstat (limited to 'kernel/drivers/net/ethernet/neterion/vxge/vxge-main.c')
| -rw-r--r-- | kernel/drivers/net/ethernet/neterion/vxge/vxge-main.c | 4870 |
1 files changed, 4870 insertions, 0 deletions
diff --git a/kernel/drivers/net/ethernet/neterion/vxge/vxge-main.c b/kernel/drivers/net/ethernet/neterion/vxge/vxge-main.c new file mode 100644 index 000000000..50d560483 --- /dev/null +++ b/kernel/drivers/net/ethernet/neterion/vxge/vxge-main.c @@ -0,0 +1,4870 @@ +/****************************************************************************** +* This software may be used and distributed according to the terms of +* the GNU General Public License (GPL), incorporated herein by reference. +* Drivers based on or derived from this code fall under the GPL and must +* retain the authorship, copyright and license notice. This file is not +* a complete program and may only be used when the entire operating +* system is licensed under the GPL. +* See the file COPYING in this distribution for more information. +* +* vxge-main.c: Driver for Exar Corp's X3100 Series 10GbE PCIe I/O +* Virtualized Server Adapter. +* Copyright(c) 2002-2010 Exar Corp. +* +* The module loadable parameters that are supported by the driver and a brief +* explanation of all the variables: +* vlan_tag_strip: +* Strip VLAN Tag enable/disable. Instructs the device to remove +* the VLAN tag from all received tagged frames that are not +* replicated at the internal L2 switch. +* 0 - Do not strip the VLAN tag. +* 1 - Strip the VLAN tag. +* +* addr_learn_en: +* Enable learning the mac address of the guest OS interface in +* a virtualization environment. +* 0 - DISABLE +* 1 - ENABLE +* +* max_config_port: +* Maximum number of port to be supported. +* MIN -1 and MAX - 2 +* +* max_config_vpath: +* This configures the maximum no of VPATH configures for each +* device function. +* MIN - 1 and MAX - 17 +* +* max_config_dev: +* This configures maximum no of Device function to be enabled. +* MIN - 1 and MAX - 17 +* +******************************************************************************/ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/bitops.h> +#include <linux/if_vlan.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/slab.h> +#include <linux/tcp.h> +#include <net/ip.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/firmware.h> +#include <linux/net_tstamp.h> +#include <linux/prefetch.h> +#include <linux/module.h> +#include "vxge-main.h" +#include "vxge-reg.h" + +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_DESCRIPTION("Neterion's X3100 Series 10GbE PCIe I/O" + "Virtualized Server Adapter"); + +static const struct pci_device_id vxge_id_table[] = { + {PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_TITAN_WIN, PCI_ANY_ID, + PCI_ANY_ID}, + {PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_TITAN_UNI, PCI_ANY_ID, + PCI_ANY_ID}, + {0} +}; + +MODULE_DEVICE_TABLE(pci, vxge_id_table); + +VXGE_MODULE_PARAM_INT(vlan_tag_strip, VXGE_HW_VPATH_RPA_STRIP_VLAN_TAG_ENABLE); +VXGE_MODULE_PARAM_INT(addr_learn_en, VXGE_HW_MAC_ADDR_LEARN_DEFAULT); +VXGE_MODULE_PARAM_INT(max_config_port, VXGE_MAX_CONFIG_PORT); +VXGE_MODULE_PARAM_INT(max_config_vpath, VXGE_USE_DEFAULT); +VXGE_MODULE_PARAM_INT(max_mac_vpath, VXGE_MAX_MAC_ADDR_COUNT); +VXGE_MODULE_PARAM_INT(max_config_dev, VXGE_MAX_CONFIG_DEV); + +static u16 vpath_selector[VXGE_HW_MAX_VIRTUAL_PATHS] = + {0, 1, 3, 3, 7, 7, 7, 7, 15, 15, 15, 15, 15, 15, 15, 15, 31}; +static unsigned int bw_percentage[VXGE_HW_MAX_VIRTUAL_PATHS] = + {[0 ...(VXGE_HW_MAX_VIRTUAL_PATHS - 1)] = 0xFF}; +module_param_array(bw_percentage, uint, NULL, 0); + +static struct vxge_drv_config *driver_config; +static enum vxge_hw_status vxge_reset_all_vpaths(struct vxgedev *vdev); + +static inline int is_vxge_card_up(struct vxgedev *vdev) +{ + return test_bit(__VXGE_STATE_CARD_UP, &vdev->state); +} + +static inline void VXGE_COMPLETE_VPATH_TX(struct vxge_fifo *fifo) +{ + struct sk_buff **skb_ptr = NULL; + struct sk_buff **temp; +#define NR_SKB_COMPLETED 128 + struct sk_buff *completed[NR_SKB_COMPLETED]; + int more; + + do { + more = 0; + skb_ptr = completed; + + if (__netif_tx_trylock(fifo->txq)) { + vxge_hw_vpath_poll_tx(fifo->handle, &skb_ptr, + NR_SKB_COMPLETED, &more); + __netif_tx_unlock(fifo->txq); + } + + /* free SKBs */ + for (temp = completed; temp != skb_ptr; temp++) + dev_kfree_skb_irq(*temp); + } while (more); +} + +static inline void VXGE_COMPLETE_ALL_TX(struct vxgedev *vdev) +{ + int i; + + /* Complete all transmits */ + for (i = 0; i < vdev->no_of_vpath; i++) + VXGE_COMPLETE_VPATH_TX(&vdev->vpaths[i].fifo); +} + +static inline void VXGE_COMPLETE_ALL_RX(struct vxgedev *vdev) +{ + int i; + struct vxge_ring *ring; + + /* Complete all receives*/ + for (i = 0; i < vdev->no_of_vpath; i++) { + ring = &vdev->vpaths[i].ring; + vxge_hw_vpath_poll_rx(ring->handle); + } +} + +/* + * vxge_callback_link_up + * + * This function is called during interrupt context to notify link up state + * change. + */ +static void vxge_callback_link_up(struct __vxge_hw_device *hldev) +{ + struct net_device *dev = hldev->ndev; + struct vxgedev *vdev = netdev_priv(dev); + + vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d", + vdev->ndev->name, __func__, __LINE__); + netdev_notice(vdev->ndev, "Link Up\n"); + vdev->stats.link_up++; + + netif_carrier_on(vdev->ndev); + netif_tx_wake_all_queues(vdev->ndev); + + vxge_debug_entryexit(VXGE_TRACE, + "%s: %s:%d Exiting...", vdev->ndev->name, __func__, __LINE__); +} + +/* + * vxge_callback_link_down + * + * This function is called during interrupt context to notify link down state + * change. + */ +static void vxge_callback_link_down(struct __vxge_hw_device *hldev) +{ + struct net_device *dev = hldev->ndev; + struct vxgedev *vdev = netdev_priv(dev); + + vxge_debug_entryexit(VXGE_TRACE, + "%s: %s:%d", vdev->ndev->name, __func__, __LINE__); + netdev_notice(vdev->ndev, "Link Down\n"); + + vdev->stats.link_down++; + netif_carrier_off(vdev->ndev); + netif_tx_stop_all_queues(vdev->ndev); + + vxge_debug_entryexit(VXGE_TRACE, + "%s: %s:%d Exiting...", vdev->ndev->name, __func__, __LINE__); +} + +/* + * vxge_rx_alloc + * + * Allocate SKB. + */ +static struct sk_buff * +vxge_rx_alloc(void *dtrh, struct vxge_ring *ring, const int skb_size) +{ + struct net_device *dev; + struct sk_buff *skb; + struct vxge_rx_priv *rx_priv; + + dev = ring->ndev; + vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d", + ring->ndev->name, __func__, __LINE__); + + rx_priv = vxge_hw_ring_rxd_private_get(dtrh); + + /* try to allocate skb first. this one may fail */ + skb = netdev_alloc_skb(dev, skb_size + + VXGE_HW_HEADER_ETHERNET_II_802_3_ALIGN); + if (skb == NULL) { + vxge_debug_mem(VXGE_ERR, + "%s: out of memory to allocate SKB", dev->name); + ring->stats.skb_alloc_fail++; + return NULL; + } + + vxge_debug_mem(VXGE_TRACE, + "%s: %s:%d Skb : 0x%p", ring->ndev->name, + __func__, __LINE__, skb); + + skb_reserve(skb, VXGE_HW_HEADER_ETHERNET_II_802_3_ALIGN); + + rx_priv->skb = skb; + rx_priv->skb_data = NULL; + rx_priv->data_size = skb_size; + vxge_debug_entryexit(VXGE_TRACE, + "%s: %s:%d Exiting...", ring->ndev->name, __func__, __LINE__); + + return skb; +} + +/* + * vxge_rx_map + */ +static int vxge_rx_map(void *dtrh, struct vxge_ring *ring) +{ + struct vxge_rx_priv *rx_priv; + dma_addr_t dma_addr; + + vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d", + ring->ndev->name, __func__, __LINE__); + rx_priv = vxge_hw_ring_rxd_private_get(dtrh); + + rx_priv->skb_data = rx_priv->skb->data; + dma_addr = pci_map_single(ring->pdev, rx_priv->skb_data, + rx_priv->data_size, PCI_DMA_FROMDEVICE); + + if (unlikely(pci_dma_mapping_error(ring->pdev, dma_addr))) { + ring->stats.pci_map_fail++; + return -EIO; + } + vxge_debug_mem(VXGE_TRACE, + "%s: %s:%d 1 buffer mode dma_addr = 0x%llx", + ring->ndev->name, __func__, __LINE__, + (unsigned long long)dma_addr); + vxge_hw_ring_rxd_1b_set(dtrh, dma_addr, rx_priv->data_size); + + rx_priv->data_dma = dma_addr; + vxge_debug_entryexit(VXGE_TRACE, + "%s: %s:%d Exiting...", ring->ndev->name, __func__, __LINE__); + + return 0; +} + +/* + * vxge_rx_initial_replenish + * Allocation of RxD as an initial replenish procedure. + */ +static enum vxge_hw_status +vxge_rx_initial_replenish(void *dtrh, void *userdata) +{ + struct vxge_ring *ring = (struct vxge_ring *)userdata; + struct vxge_rx_priv *rx_priv; + + vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d", + ring->ndev->name, __func__, __LINE__); + if (vxge_rx_alloc(dtrh, ring, + VXGE_LL_MAX_FRAME_SIZE(ring->ndev)) == NULL) + return VXGE_HW_FAIL; + + if (vxge_rx_map(dtrh, ring)) { + rx_priv = vxge_hw_ring_rxd_private_get(dtrh); + dev_kfree_skb(rx_priv->skb); + + return VXGE_HW_FAIL; + } + vxge_debug_entryexit(VXGE_TRACE, + "%s: %s:%d Exiting...", ring->ndev->name, __func__, __LINE__); + + return VXGE_HW_OK; +} + +static inline void +vxge_rx_complete(struct vxge_ring *ring, struct sk_buff *skb, u16 vlan, + int pkt_length, struct vxge_hw_ring_rxd_info *ext_info) +{ + + vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d", + ring->ndev->name, __func__, __LINE__); + skb_record_rx_queue(skb, ring->driver_id); + skb->protocol = eth_type_trans(skb, ring->ndev); + + u64_stats_update_begin(&ring->stats.syncp); + ring->stats.rx_frms++; + ring->stats.rx_bytes += pkt_length; + + if (skb->pkt_type == PACKET_MULTICAST) + ring->stats.rx_mcast++; + u64_stats_update_end(&ring->stats.syncp); + + vxge_debug_rx(VXGE_TRACE, + "%s: %s:%d skb protocol = %d", + ring->ndev->name, __func__, __LINE__, skb->protocol); + + if (ext_info->vlan && + ring->vlan_tag_strip == VXGE_HW_VPATH_RPA_STRIP_VLAN_TAG_ENABLE) + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ext_info->vlan); + napi_gro_receive(ring->napi_p, skb); + + vxge_debug_entryexit(VXGE_TRACE, + "%s: %s:%d Exiting...", ring->ndev->name, __func__, __LINE__); +} + +static inline void vxge_re_pre_post(void *dtr, struct vxge_ring *ring, + struct vxge_rx_priv *rx_priv) +{ + pci_dma_sync_single_for_device(ring->pdev, + rx_priv->data_dma, rx_priv->data_size, PCI_DMA_FROMDEVICE); + + vxge_hw_ring_rxd_1b_set(dtr, rx_priv->data_dma, rx_priv->data_size); + vxge_hw_ring_rxd_pre_post(ring->handle, dtr); +} + +static inline void vxge_post(int *dtr_cnt, void **first_dtr, + void *post_dtr, struct __vxge_hw_ring *ringh) +{ + int dtr_count = *dtr_cnt; + if ((*dtr_cnt % VXGE_HW_RXSYNC_FREQ_CNT) == 0) { + if (*first_dtr) + vxge_hw_ring_rxd_post_post_wmb(ringh, *first_dtr); + *first_dtr = post_dtr; + } else + vxge_hw_ring_rxd_post_post(ringh, post_dtr); + dtr_count++; + *dtr_cnt = dtr_count; +} + +/* + * vxge_rx_1b_compl + * + * If the interrupt is because of a received frame or if the receive ring + * contains fresh as yet un-processed frames, this function is called. + */ +static enum vxge_hw_status +vxge_rx_1b_compl(struct __vxge_hw_ring *ringh, void *dtr, + u8 t_code, void *userdata) +{ + struct vxge_ring *ring = (struct vxge_ring *)userdata; + struct net_device *dev = ring->ndev; + unsigned int dma_sizes; + void *first_dtr = NULL; + int dtr_cnt = 0; + int data_size; + dma_addr_t data_dma; + int pkt_length; + struct sk_buff *skb; + struct vxge_rx_priv *rx_priv; + struct vxge_hw_ring_rxd_info ext_info; + vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d", + ring->ndev->name, __func__, __LINE__); + + if (ring->budget <= 0) + goto out; + + do { + prefetch((char *)dtr + L1_CACHE_BYTES); + rx_priv = vxge_hw_ring_rxd_private_get(dtr); + skb = rx_priv->skb; + data_size = rx_priv->data_size; + data_dma = rx_priv->data_dma; + prefetch(rx_priv->skb_data); + + vxge_debug_rx(VXGE_TRACE, + "%s: %s:%d skb = 0x%p", + ring->ndev->name, __func__, __LINE__, skb); + + vxge_hw_ring_rxd_1b_get(ringh, dtr, &dma_sizes); + pkt_length = dma_sizes; + + pkt_length -= ETH_FCS_LEN; + + vxge_debug_rx(VXGE_TRACE, + "%s: %s:%d Packet Length = %d", + ring->ndev->name, __func__, __LINE__, pkt_length); + + vxge_hw_ring_rxd_1b_info_get(ringh, dtr, &ext_info); + + /* check skb validity */ + vxge_assert(skb); + + prefetch((char *)skb + L1_CACHE_BYTES); + if (unlikely(t_code)) { + if (vxge_hw_ring_handle_tcode(ringh, dtr, t_code) != + VXGE_HW_OK) { + + ring->stats.rx_errors++; + vxge_debug_rx(VXGE_TRACE, + "%s: %s :%d Rx T_code is %d", + ring->ndev->name, __func__, + __LINE__, t_code); + + /* If the t_code is not supported and if the + * t_code is other than 0x5 (unparseable packet + * such as unknown UPV6 header), Drop it !!! + */ + vxge_re_pre_post(dtr, ring, rx_priv); + + vxge_post(&dtr_cnt, &first_dtr, dtr, ringh); + ring->stats.rx_dropped++; + continue; + } + } + + if (pkt_length > VXGE_LL_RX_COPY_THRESHOLD) { + if (vxge_rx_alloc(dtr, ring, data_size) != NULL) { + if (!vxge_rx_map(dtr, ring)) { + skb_put(skb, pkt_length); + + pci_unmap_single(ring->pdev, data_dma, + data_size, PCI_DMA_FROMDEVICE); + + vxge_hw_ring_rxd_pre_post(ringh, dtr); + vxge_post(&dtr_cnt, &first_dtr, dtr, + ringh); + } else { + dev_kfree_skb(rx_priv->skb); + rx_priv->skb = skb; + rx_priv->data_size = data_size; + vxge_re_pre_post(dtr, ring, rx_priv); + + vxge_post(&dtr_cnt, &first_dtr, dtr, + ringh); + ring->stats.rx_dropped++; + break; + } + } else { + vxge_re_pre_post(dtr, ring, rx_priv); + + vxge_post(&dtr_cnt, &first_dtr, dtr, ringh); + ring->stats.rx_dropped++; + break; + } + } else { + struct sk_buff *skb_up; + + skb_up = netdev_alloc_skb(dev, pkt_length + + VXGE_HW_HEADER_ETHERNET_II_802_3_ALIGN); + if (skb_up != NULL) { + skb_reserve(skb_up, + VXGE_HW_HEADER_ETHERNET_II_802_3_ALIGN); + + pci_dma_sync_single_for_cpu(ring->pdev, + data_dma, data_size, + PCI_DMA_FROMDEVICE); + + vxge_debug_mem(VXGE_TRACE, + "%s: %s:%d skb_up = %p", + ring->ndev->name, __func__, + __LINE__, skb); + memcpy(skb_up->data, skb->data, pkt_length); + + vxge_re_pre_post(dtr, ring, rx_priv); + + vxge_post(&dtr_cnt, &first_dtr, dtr, + ringh); + /* will netif_rx small SKB instead */ + skb = skb_up; + skb_put(skb, pkt_length); + } else { + vxge_re_pre_post(dtr, ring, rx_priv); + + vxge_post(&dtr_cnt, &first_dtr, dtr, ringh); + vxge_debug_rx(VXGE_ERR, + "%s: vxge_rx_1b_compl: out of " + "memory", dev->name); + ring->stats.skb_alloc_fail++; + break; + } + } + + if ((ext_info.proto & VXGE_HW_FRAME_PROTO_TCP_OR_UDP) && + !(ext_info.proto & VXGE_HW_FRAME_PROTO_IP_FRAG) && + (dev->features & NETIF_F_RXCSUM) && /* Offload Rx side CSUM */ + ext_info.l3_cksum == VXGE_HW_L3_CKSUM_OK && + ext_info.l4_cksum == VXGE_HW_L4_CKSUM_OK) + skb->ip_summed = CHECKSUM_UNNECESSARY; + else + skb_checksum_none_assert(skb); + + + if (ring->rx_hwts) { + struct skb_shared_hwtstamps *skb_hwts; + u32 ns = *(u32 *)(skb->head + pkt_length); + + skb_hwts = skb_hwtstamps(skb); + skb_hwts->hwtstamp = ns_to_ktime(ns); + } + + /* rth_hash_type and rth_it_hit are non-zero regardless of + * whether rss is enabled. Only the rth_value is zero/non-zero + * if rss is disabled/enabled, so key off of that. + */ + if (ext_info.rth_value) + skb_set_hash(skb, ext_info.rth_value, + PKT_HASH_TYPE_L3); + + vxge_rx_complete(ring, skb, ext_info.vlan, + pkt_length, &ext_info); + + ring->budget--; + ring->pkts_processed++; + if (!ring->budget) + break; + + } while (vxge_hw_ring_rxd_next_completed(ringh, &dtr, + &t_code) == VXGE_HW_OK); + + if (first_dtr) + vxge_hw_ring_rxd_post_post_wmb(ringh, first_dtr); + +out: + vxge_debug_entryexit(VXGE_TRACE, + "%s:%d Exiting...", + __func__, __LINE__); + return VXGE_HW_OK; +} + +/* + * vxge_xmit_compl + * + * If an interrupt was raised to indicate DMA complete of the Tx packet, + * this function is called. It identifies the last TxD whose buffer was + * freed and frees all skbs whose data have already DMA'ed into the NICs + * internal memory. + */ +static enum vxge_hw_status +vxge_xmit_compl(struct __vxge_hw_fifo *fifo_hw, void *dtr, + enum vxge_hw_fifo_tcode t_code, void *userdata, + struct sk_buff ***skb_ptr, int nr_skb, int *more) +{ + struct vxge_fifo *fifo = (struct vxge_fifo *)userdata; + struct sk_buff *skb, **done_skb = *skb_ptr; + int pkt_cnt = 0; + + vxge_debug_entryexit(VXGE_TRACE, + "%s:%d Entered....", __func__, __LINE__); + + do { + int frg_cnt; + skb_frag_t *frag; + int i = 0, j; + struct vxge_tx_priv *txd_priv = + vxge_hw_fifo_txdl_private_get(dtr); + + skb = txd_priv->skb; + frg_cnt = skb_shinfo(skb)->nr_frags; + frag = &skb_shinfo(skb)->frags[0]; + + vxge_debug_tx(VXGE_TRACE, + "%s: %s:%d fifo_hw = %p dtr = %p " + "tcode = 0x%x", fifo->ndev->name, __func__, + __LINE__, fifo_hw, dtr, t_code); + /* check skb validity */ + vxge_assert(skb); + vxge_debug_tx(VXGE_TRACE, + "%s: %s:%d skb = %p itxd_priv = %p frg_cnt = %d", + fifo->ndev->name, __func__, __LINE__, + skb, txd_priv, frg_cnt); + if (unlikely(t_code)) { + fifo->stats.tx_errors++; + vxge_debug_tx(VXGE_ERR, + "%s: tx: dtr %p completed due to " + "error t_code %01x", fifo->ndev->name, + dtr, t_code); + vxge_hw_fifo_handle_tcode(fifo_hw, dtr, t_code); + } + + /* for unfragmented skb */ + pci_unmap_single(fifo->pdev, txd_priv->dma_buffers[i++], + skb_headlen(skb), PCI_DMA_TODEVICE); + + for (j = 0; j < frg_cnt; j++) { + pci_unmap_page(fifo->pdev, + txd_priv->dma_buffers[i++], + skb_frag_size(frag), PCI_DMA_TODEVICE); + frag += 1; + } + + vxge_hw_fifo_txdl_free(fifo_hw, dtr); + + /* Updating the statistics block */ + u64_stats_update_begin(&fifo->stats.syncp); + fifo->stats.tx_frms++; + fifo->stats.tx_bytes += skb->len; + u64_stats_update_end(&fifo->stats.syncp); + + *done_skb++ = skb; + + if (--nr_skb <= 0) { + *more = 1; + break; + } + + pkt_cnt++; + if (pkt_cnt > fifo->indicate_max_pkts) + break; + + } while (vxge_hw_fifo_txdl_next_completed(fifo_hw, + &dtr, &t_code) == VXGE_HW_OK); + + *skb_ptr = done_skb; + if (netif_tx_queue_stopped(fifo->txq)) + netif_tx_wake_queue(fifo->txq); + + vxge_debug_entryexit(VXGE_TRACE, + "%s: %s:%d Exiting...", + fifo->ndev->name, __func__, __LINE__); + return VXGE_HW_OK; +} + +/* select a vpath to transmit the packet */ +static u32 vxge_get_vpath_no(struct vxgedev *vdev, struct sk_buff *skb) +{ + u16 queue_len, counter = 0; + if (skb->protocol == htons(ETH_P_IP)) { + struct iphdr *ip; + struct tcphdr *th; + + ip = ip_hdr(skb); + + if (!ip_is_fragment(ip)) { + th = (struct tcphdr *)(((unsigned char *)ip) + + ip->ihl*4); + + queue_len = vdev->no_of_vpath; + counter = (ntohs(th->source) + + ntohs(th->dest)) & + vdev->vpath_selector[queue_len - 1]; + if (counter >= queue_len) + counter = queue_len - 1; + } + } + return counter; +} + +static enum vxge_hw_status vxge_search_mac_addr_in_list( + struct vxge_vpath *vpath, u64 del_mac) +{ + struct list_head *entry, *next; + list_for_each_safe(entry, next, &vpath->mac_addr_list) { + if (((struct vxge_mac_addrs *)entry)->macaddr == del_mac) + return TRUE; + } + return FALSE; +} + +static int vxge_mac_list_add(struct vxge_vpath *vpath, struct macInfo *mac) +{ + struct vxge_mac_addrs *new_mac_entry; + u8 *mac_address = NULL; + + if (vpath->mac_addr_cnt >= VXGE_MAX_LEARN_MAC_ADDR_CNT) + return TRUE; + + new_mac_entry = kzalloc(sizeof(struct vxge_mac_addrs), GFP_ATOMIC); + if (!new_mac_entry) { + vxge_debug_mem(VXGE_ERR, + "%s: memory allocation failed", + VXGE_DRIVER_NAME); + return FALSE; + } + + list_add(&new_mac_entry->item, &vpath->mac_addr_list); + + /* Copy the new mac address to the list */ + mac_address = (u8 *)&new_mac_entry->macaddr; + memcpy(mac_address, mac->macaddr, ETH_ALEN); + + new_mac_entry->state = mac->state; + vpath->mac_addr_cnt++; + + if (is_multicast_ether_addr(mac->macaddr)) + vpath->mcast_addr_cnt++; + + return TRUE; +} + +/* Add a mac address to DA table */ +static enum vxge_hw_status +vxge_add_mac_addr(struct vxgedev *vdev, struct macInfo *mac) +{ + enum vxge_hw_status status = VXGE_HW_OK; + struct vxge_vpath *vpath; + enum vxge_hw_vpath_mac_addr_add_mode duplicate_mode; + + if (is_multicast_ether_addr(mac->macaddr)) + duplicate_mode = VXGE_HW_VPATH_MAC_ADDR_ADD_DUPLICATE; + else + duplicate_mode = VXGE_HW_VPATH_MAC_ADDR_REPLACE_DUPLICATE; + + vpath = &vdev->vpaths[mac->vpath_no]; + status = vxge_hw_vpath_mac_addr_add(vpath->handle, mac->macaddr, + mac->macmask, duplicate_mode); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "DA config add entry failed for vpath:%d", + vpath->device_id); + } else + if (FALSE == vxge_mac_list_add(vpath, mac)) + status = -EPERM; + + return status; +} + +static int vxge_learn_mac(struct vxgedev *vdev, u8 *mac_header) +{ + struct macInfo mac_info; + u8 *mac_address = NULL; + u64 mac_addr = 0, vpath_vector = 0; + int vpath_idx = 0; + enum vxge_hw_status status = VXGE_HW_OK; + struct vxge_vpath *vpath = NULL; + + mac_address = (u8 *)&mac_addr; + memcpy(mac_address, mac_header, ETH_ALEN); + + /* Is this mac address already in the list? */ + for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath; vpath_idx++) { + vpath = &vdev->vpaths[vpath_idx]; + if (vxge_search_mac_addr_in_list(vpath, mac_addr)) + return vpath_idx; + } + + memset(&mac_info, 0, sizeof(struct macInfo)); + memcpy(mac_info.macaddr, mac_header, ETH_ALEN); + + /* Any vpath has room to add mac address to its da table? */ + for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath; vpath_idx++) { + vpath = &vdev->vpaths[vpath_idx]; + if (vpath->mac_addr_cnt < vpath->max_mac_addr_cnt) { + /* Add this mac address to this vpath */ + mac_info.vpath_no = vpath_idx; + mac_info.state = VXGE_LL_MAC_ADDR_IN_DA_TABLE; + status = vxge_add_mac_addr(vdev, &mac_info); + if (status != VXGE_HW_OK) + return -EPERM; + return vpath_idx; + } + } + + mac_info.state = VXGE_LL_MAC_ADDR_IN_LIST; + vpath_idx = 0; + mac_info.vpath_no = vpath_idx; + /* Is the first vpath already selected as catch-basin ? */ + vpath = &vdev->vpaths[vpath_idx]; + if (vpath->mac_addr_cnt > vpath->max_mac_addr_cnt) { + /* Add this mac address to this vpath */ + if (FALSE == vxge_mac_list_add(vpath, &mac_info)) + return -EPERM; + return vpath_idx; + } + + /* Select first vpath as catch-basin */ + vpath_vector = vxge_mBIT(vpath->device_id); + status = vxge_hw_mgmt_reg_write(vpath->vdev->devh, + vxge_hw_mgmt_reg_type_mrpcim, + 0, + (ulong)offsetof( + struct vxge_hw_mrpcim_reg, + rts_mgr_cbasin_cfg), + vpath_vector); + if (status != VXGE_HW_OK) { + vxge_debug_tx(VXGE_ERR, + "%s: Unable to set the vpath-%d in catch-basin mode", + VXGE_DRIVER_NAME, vpath->device_id); + return -EPERM; + } + + if (FALSE == vxge_mac_list_add(vpath, &mac_info)) + return -EPERM; + + return vpath_idx; +} + +/** + * vxge_xmit + * @skb : the socket buffer containing the Tx data. + * @dev : device pointer. + * + * This function is the Tx entry point of the driver. Neterion NIC supports + * certain protocol assist features on Tx side, namely CSO, S/G, LSO. +*/ +static netdev_tx_t +vxge_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct vxge_fifo *fifo = NULL; + void *dtr_priv; + void *dtr = NULL; + struct vxgedev *vdev = NULL; + enum vxge_hw_status status; + int frg_cnt, first_frg_len; + skb_frag_t *frag; + int i = 0, j = 0, avail; + u64 dma_pointer; + struct vxge_tx_priv *txdl_priv = NULL; + struct __vxge_hw_fifo *fifo_hw; + int offload_type; + int vpath_no = 0; + + vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d", + dev->name, __func__, __LINE__); + + /* A buffer with no data will be dropped */ + if (unlikely(skb->len <= 0)) { + vxge_debug_tx(VXGE_ERR, + "%s: Buffer has no data..", dev->name); + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; + } + + vdev = netdev_priv(dev); + + if (unlikely(!is_vxge_card_up(vdev))) { + vxge_debug_tx(VXGE_ERR, + "%s: vdev not initialized", dev->name); + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; + } + + if (vdev->config.addr_learn_en) { + vpath_no = vxge_learn_mac(vdev, skb->data + ETH_ALEN); + if (vpath_no == -EPERM) { + vxge_debug_tx(VXGE_ERR, + "%s: Failed to store the mac address", + dev->name); + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; + } + } + + if (vdev->config.tx_steering_type == TX_MULTIQ_STEERING) + vpath_no = skb_get_queue_mapping(skb); + else if (vdev->config.tx_steering_type == TX_PORT_STEERING) + vpath_no = vxge_get_vpath_no(vdev, skb); + + vxge_debug_tx(VXGE_TRACE, "%s: vpath_no= %d", dev->name, vpath_no); + + if (vpath_no >= vdev->no_of_vpath) + vpath_no = 0; + + fifo = &vdev->vpaths[vpath_no].fifo; + fifo_hw = fifo->handle; + + if (netif_tx_queue_stopped(fifo->txq)) + return NETDEV_TX_BUSY; + + avail = vxge_hw_fifo_free_txdl_count_get(fifo_hw); + if (avail == 0) { + vxge_debug_tx(VXGE_ERR, + "%s: No free TXDs available", dev->name); + fifo->stats.txd_not_free++; + goto _exit0; + } + + /* Last TXD? Stop tx queue to avoid dropping packets. TX + * completion will resume the queue. + */ + if (avail == 1) + netif_tx_stop_queue(fifo->txq); + + status = vxge_hw_fifo_txdl_reserve(fifo_hw, &dtr, &dtr_priv); + if (unlikely(status != VXGE_HW_OK)) { + vxge_debug_tx(VXGE_ERR, + "%s: Out of descriptors .", dev->name); + fifo->stats.txd_out_of_desc++; + goto _exit0; + } + + vxge_debug_tx(VXGE_TRACE, + "%s: %s:%d fifo_hw = %p dtr = %p dtr_priv = %p", + dev->name, __func__, __LINE__, + fifo_hw, dtr, dtr_priv); + + if (skb_vlan_tag_present(skb)) { + u16 vlan_tag = skb_vlan_tag_get(skb); + vxge_hw_fifo_txdl_vlan_set(dtr, vlan_tag); + } + + first_frg_len = skb_headlen(skb); + + dma_pointer = pci_map_single(fifo->pdev, skb->data, first_frg_len, + PCI_DMA_TODEVICE); + + if (unlikely(pci_dma_mapping_error(fifo->pdev, dma_pointer))) { + vxge_hw_fifo_txdl_free(fifo_hw, dtr); + fifo->stats.pci_map_fail++; + goto _exit0; + } + + txdl_priv = vxge_hw_fifo_txdl_private_get(dtr); + txdl_priv->skb = skb; + txdl_priv->dma_buffers[j] = dma_pointer; + + frg_cnt = skb_shinfo(skb)->nr_frags; + vxge_debug_tx(VXGE_TRACE, + "%s: %s:%d skb = %p txdl_priv = %p " + "frag_cnt = %d dma_pointer = 0x%llx", dev->name, + __func__, __LINE__, skb, txdl_priv, + frg_cnt, (unsigned long long)dma_pointer); + + vxge_hw_fifo_txdl_buffer_set(fifo_hw, dtr, j++, dma_pointer, + first_frg_len); + + frag = &skb_shinfo(skb)->frags[0]; + for (i = 0; i < frg_cnt; i++) { + /* ignore 0 length fragment */ + if (!skb_frag_size(frag)) + continue; + + dma_pointer = (u64)skb_frag_dma_map(&fifo->pdev->dev, frag, + 0, skb_frag_size(frag), + DMA_TO_DEVICE); + + if (unlikely(dma_mapping_error(&fifo->pdev->dev, dma_pointer))) + goto _exit2; + vxge_debug_tx(VXGE_TRACE, + "%s: %s:%d frag = %d dma_pointer = 0x%llx", + dev->name, __func__, __LINE__, i, + (unsigned long long)dma_pointer); + + txdl_priv->dma_buffers[j] = dma_pointer; + vxge_hw_fifo_txdl_buffer_set(fifo_hw, dtr, j++, dma_pointer, + skb_frag_size(frag)); + frag += 1; + } + + offload_type = vxge_offload_type(skb); + + if (offload_type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)) { + int mss = vxge_tcp_mss(skb); + if (mss) { + vxge_debug_tx(VXGE_TRACE, "%s: %s:%d mss = %d", + dev->name, __func__, __LINE__, mss); + vxge_hw_fifo_txdl_mss_set(dtr, mss); + } else { + vxge_assert(skb->len <= + dev->mtu + VXGE_HW_MAC_HEADER_MAX_SIZE); + vxge_assert(0); + goto _exit1; + } + } + + if (skb->ip_summed == CHECKSUM_PARTIAL) + vxge_hw_fifo_txdl_cksum_set_bits(dtr, + VXGE_HW_FIFO_TXD_TX_CKO_IPV4_EN | + VXGE_HW_FIFO_TXD_TX_CKO_TCP_EN | + VXGE_HW_FIFO_TXD_TX_CKO_UDP_EN); + + vxge_hw_fifo_txdl_post(fifo_hw, dtr); + + vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d Exiting...", + dev->name, __func__, __LINE__); + return NETDEV_TX_OK; + +_exit2: + vxge_debug_tx(VXGE_TRACE, "%s: pci_map_page failed", dev->name); +_exit1: + j = 0; + frag = &skb_shinfo(skb)->frags[0]; + + pci_unmap_single(fifo->pdev, txdl_priv->dma_buffers[j++], + skb_headlen(skb), PCI_DMA_TODEVICE); + + for (; j < i; j++) { + pci_unmap_page(fifo->pdev, txdl_priv->dma_buffers[j], + skb_frag_size(frag), PCI_DMA_TODEVICE); + frag += 1; + } + + vxge_hw_fifo_txdl_free(fifo_hw, dtr); +_exit0: + netif_tx_stop_queue(fifo->txq); + dev_kfree_skb_any(skb); + + return NETDEV_TX_OK; +} + +/* + * vxge_rx_term + * + * Function will be called by hw function to abort all outstanding receive + * descriptors. + */ +static void +vxge_rx_term(void *dtrh, enum vxge_hw_rxd_state state, void *userdata) +{ + struct vxge_ring *ring = (struct vxge_ring *)userdata; + struct vxge_rx_priv *rx_priv = + vxge_hw_ring_rxd_private_get(dtrh); + + vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d", + ring->ndev->name, __func__, __LINE__); + if (state != VXGE_HW_RXD_STATE_POSTED) + return; + + pci_unmap_single(ring->pdev, rx_priv->data_dma, + rx_priv->data_size, PCI_DMA_FROMDEVICE); + + dev_kfree_skb(rx_priv->skb); + rx_priv->skb_data = NULL; + + vxge_debug_entryexit(VXGE_TRACE, + "%s: %s:%d Exiting...", + ring->ndev->name, __func__, __LINE__); +} + +/* + * vxge_tx_term + * + * Function will be called to abort all outstanding tx descriptors + */ +static void +vxge_tx_term(void *dtrh, enum vxge_hw_txdl_state state, void *userdata) +{ + struct vxge_fifo *fifo = (struct vxge_fifo *)userdata; + skb_frag_t *frag; + int i = 0, j, frg_cnt; + struct vxge_tx_priv *txd_priv = vxge_hw_fifo_txdl_private_get(dtrh); + struct sk_buff *skb = txd_priv->skb; + + vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__); + + if (state != VXGE_HW_TXDL_STATE_POSTED) + return; + + /* check skb validity */ + vxge_assert(skb); + frg_cnt = skb_shinfo(skb)->nr_frags; + frag = &skb_shinfo(skb)->frags[0]; + + /* for unfragmented skb */ + pci_unmap_single(fifo->pdev, txd_priv->dma_buffers[i++], + skb_headlen(skb), PCI_DMA_TODEVICE); + + for (j = 0; j < frg_cnt; j++) { + pci_unmap_page(fifo->pdev, txd_priv->dma_buffers[i++], + skb_frag_size(frag), PCI_DMA_TODEVICE); + frag += 1; + } + + dev_kfree_skb(skb); + + vxge_debug_entryexit(VXGE_TRACE, + "%s:%d Exiting...", __func__, __LINE__); +} + +static int vxge_mac_list_del(struct vxge_vpath *vpath, struct macInfo *mac) +{ + struct list_head *entry, *next; + u64 del_mac = 0; + u8 *mac_address = (u8 *) (&del_mac); + + /* Copy the mac address to delete from the list */ + memcpy(mac_address, mac->macaddr, ETH_ALEN); + + list_for_each_safe(entry, next, &vpath->mac_addr_list) { + if (((struct vxge_mac_addrs *)entry)->macaddr == del_mac) { + list_del(entry); + kfree((struct vxge_mac_addrs *)entry); + vpath->mac_addr_cnt--; + + if (is_multicast_ether_addr(mac->macaddr)) + vpath->mcast_addr_cnt--; + return TRUE; + } + } + + return FALSE; +} + +/* delete a mac address from DA table */ +static enum vxge_hw_status +vxge_del_mac_addr(struct vxgedev *vdev, struct macInfo *mac) +{ + enum vxge_hw_status status = VXGE_HW_OK; + struct vxge_vpath *vpath; + + vpath = &vdev->vpaths[mac->vpath_no]; + status = vxge_hw_vpath_mac_addr_delete(vpath->handle, mac->macaddr, + mac->macmask); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "DA config delete entry failed for vpath:%d", + vpath->device_id); + } else + vxge_mac_list_del(vpath, mac); + return status; +} + +/** + * vxge_set_multicast + * @dev: pointer to the device structure + * + * Entry point for multicast address enable/disable + * This function is a driver entry point which gets called by the kernel + * whenever multicast addresses must be enabled/disabled. This also gets + * called to set/reset promiscuous mode. Depending on the deivce flag, we + * determine, if multicast address must be enabled or if promiscuous mode + * is to be disabled etc. + */ +static void vxge_set_multicast(struct net_device *dev) +{ + struct netdev_hw_addr *ha; + struct vxgedev *vdev; + int i, mcast_cnt = 0; + struct __vxge_hw_device *hldev; + struct vxge_vpath *vpath; + enum vxge_hw_status status = VXGE_HW_OK; + struct macInfo mac_info; + int vpath_idx = 0; + struct vxge_mac_addrs *mac_entry; + struct list_head *list_head; + struct list_head *entry, *next; + u8 *mac_address = NULL; + + vxge_debug_entryexit(VXGE_TRACE, + "%s:%d", __func__, __LINE__); + + vdev = netdev_priv(dev); + hldev = vdev->devh; + + if (unlikely(!is_vxge_card_up(vdev))) + return; + + if ((dev->flags & IFF_ALLMULTI) && (!vdev->all_multi_flg)) { + for (i = 0; i < vdev->no_of_vpath; i++) { + vpath = &vdev->vpaths[i]; + vxge_assert(vpath->is_open); + status = vxge_hw_vpath_mcast_enable(vpath->handle); + if (status != VXGE_HW_OK) + vxge_debug_init(VXGE_ERR, "failed to enable " + "multicast, status %d", status); + vdev->all_multi_flg = 1; + } + } else if (!(dev->flags & IFF_ALLMULTI) && (vdev->all_multi_flg)) { + for (i = 0; i < vdev->no_of_vpath; i++) { + vpath = &vdev->vpaths[i]; + vxge_assert(vpath->is_open); + status = vxge_hw_vpath_mcast_disable(vpath->handle); + if (status != VXGE_HW_OK) + vxge_debug_init(VXGE_ERR, "failed to disable " + "multicast, status %d", status); + vdev->all_multi_flg = 0; + } + } + + + if (!vdev->config.addr_learn_en) { + for (i = 0; i < vdev->no_of_vpath; i++) { + vpath = &vdev->vpaths[i]; + vxge_assert(vpath->is_open); + + if (dev->flags & IFF_PROMISC) + status = vxge_hw_vpath_promisc_enable( + vpath->handle); + else + status = vxge_hw_vpath_promisc_disable( + vpath->handle); + if (status != VXGE_HW_OK) + vxge_debug_init(VXGE_ERR, "failed to %s promisc" + ", status %d", dev->flags&IFF_PROMISC ? + "enable" : "disable", status); + } + } + + memset(&mac_info, 0, sizeof(struct macInfo)); + /* Update individual M_CAST address list */ + if ((!vdev->all_multi_flg) && netdev_mc_count(dev)) { + mcast_cnt = vdev->vpaths[0].mcast_addr_cnt; + list_head = &vdev->vpaths[0].mac_addr_list; + if ((netdev_mc_count(dev) + + (vdev->vpaths[0].mac_addr_cnt - mcast_cnt)) > + vdev->vpaths[0].max_mac_addr_cnt) + goto _set_all_mcast; + + /* Delete previous MC's */ + for (i = 0; i < mcast_cnt; i++) { + list_for_each_safe(entry, next, list_head) { + mac_entry = (struct vxge_mac_addrs *)entry; + /* Copy the mac address to delete */ + mac_address = (u8 *)&mac_entry->macaddr; + memcpy(mac_info.macaddr, mac_address, ETH_ALEN); + + if (is_multicast_ether_addr(mac_info.macaddr)) { + for (vpath_idx = 0; vpath_idx < + vdev->no_of_vpath; + vpath_idx++) { + mac_info.vpath_no = vpath_idx; + status = vxge_del_mac_addr( + vdev, + &mac_info); + } + } + } + } + + /* Add new ones */ + netdev_for_each_mc_addr(ha, dev) { + memcpy(mac_info.macaddr, ha->addr, ETH_ALEN); + for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath; + vpath_idx++) { + mac_info.vpath_no = vpath_idx; + mac_info.state = VXGE_LL_MAC_ADDR_IN_DA_TABLE; + status = vxge_add_mac_addr(vdev, &mac_info); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "%s:%d Setting individual" + "multicast address failed", + __func__, __LINE__); + goto _set_all_mcast; + } + } + } + + return; +_set_all_mcast: + mcast_cnt = vdev->vpaths[0].mcast_addr_cnt; + /* Delete previous MC's */ + for (i = 0; i < mcast_cnt; i++) { + list_for_each_safe(entry, next, list_head) { + mac_entry = (struct vxge_mac_addrs *)entry; + /* Copy the mac address to delete */ + mac_address = (u8 *)&mac_entry->macaddr; + memcpy(mac_info.macaddr, mac_address, ETH_ALEN); + + if (is_multicast_ether_addr(mac_info.macaddr)) + break; + } + + for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath; + vpath_idx++) { + mac_info.vpath_no = vpath_idx; + status = vxge_del_mac_addr(vdev, &mac_info); + } + } + + /* Enable all multicast */ + for (i = 0; i < vdev->no_of_vpath; i++) { + vpath = &vdev->vpaths[i]; + vxge_assert(vpath->is_open); + + status = vxge_hw_vpath_mcast_enable(vpath->handle); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "%s:%d Enabling all multicasts failed", + __func__, __LINE__); + } + vdev->all_multi_flg = 1; + } + dev->flags |= IFF_ALLMULTI; + } + + vxge_debug_entryexit(VXGE_TRACE, + "%s:%d Exiting...", __func__, __LINE__); +} + +/** + * vxge_set_mac_addr + * @dev: pointer to the device structure + * + * Update entry "0" (default MAC addr) + */ +static int vxge_set_mac_addr(struct net_device *dev, void *p) +{ + struct sockaddr *addr = p; + struct vxgedev *vdev; + struct __vxge_hw_device *hldev; + enum vxge_hw_status status = VXGE_HW_OK; + struct macInfo mac_info_new, mac_info_old; + int vpath_idx = 0; + + vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__); + + vdev = netdev_priv(dev); + hldev = vdev->devh; + + if (!is_valid_ether_addr(addr->sa_data)) + return -EINVAL; + + memset(&mac_info_new, 0, sizeof(struct macInfo)); + memset(&mac_info_old, 0, sizeof(struct macInfo)); + + vxge_debug_entryexit(VXGE_TRACE, "%s:%d Exiting...", + __func__, __LINE__); + + /* Get the old address */ + memcpy(mac_info_old.macaddr, dev->dev_addr, dev->addr_len); + + /* Copy the new address */ + memcpy(mac_info_new.macaddr, addr->sa_data, dev->addr_len); + + /* First delete the old mac address from all the vpaths + as we can't specify the index while adding new mac address */ + for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath; vpath_idx++) { + struct vxge_vpath *vpath = &vdev->vpaths[vpath_idx]; + if (!vpath->is_open) { + /* This can happen when this interface is added/removed + to the bonding interface. Delete this station address + from the linked list */ + vxge_mac_list_del(vpath, &mac_info_old); + + /* Add this new address to the linked list + for later restoring */ + vxge_mac_list_add(vpath, &mac_info_new); + + continue; + } + /* Delete the station address */ + mac_info_old.vpath_no = vpath_idx; + status = vxge_del_mac_addr(vdev, &mac_info_old); + } + + if (unlikely(!is_vxge_card_up(vdev))) { + memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); + return VXGE_HW_OK; + } + + /* Set this mac address to all the vpaths */ + for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath; vpath_idx++) { + mac_info_new.vpath_no = vpath_idx; + mac_info_new.state = VXGE_LL_MAC_ADDR_IN_DA_TABLE; + status = vxge_add_mac_addr(vdev, &mac_info_new); + if (status != VXGE_HW_OK) + return -EINVAL; + } + + memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); + + return status; +} + +/* + * vxge_vpath_intr_enable + * @vdev: pointer to vdev + * @vp_id: vpath for which to enable the interrupts + * + * Enables the interrupts for the vpath +*/ +static void vxge_vpath_intr_enable(struct vxgedev *vdev, int vp_id) +{ + struct vxge_vpath *vpath = &vdev->vpaths[vp_id]; + int msix_id = 0; + int tim_msix_id[4] = {0, 1, 0, 0}; + int alarm_msix_id = VXGE_ALARM_MSIX_ID; + + vxge_hw_vpath_intr_enable(vpath->handle); + + if (vdev->config.intr_type == INTA) + vxge_hw_vpath_inta_unmask_tx_rx(vpath->handle); + else { + vxge_hw_vpath_msix_set(vpath->handle, tim_msix_id, + alarm_msix_id); + + msix_id = vpath->device_id * VXGE_HW_VPATH_MSIX_ACTIVE; + vxge_hw_vpath_msix_unmask(vpath->handle, msix_id); + vxge_hw_vpath_msix_unmask(vpath->handle, msix_id + 1); + + /* enable the alarm vector */ + msix_id = (vpath->handle->vpath->hldev->first_vp_id * + VXGE_HW_VPATH_MSIX_ACTIVE) + alarm_msix_id; + vxge_hw_vpath_msix_unmask(vpath->handle, msix_id); + } +} + +/* + * vxge_vpath_intr_disable + * @vdev: pointer to vdev + * @vp_id: vpath for which to disable the interrupts + * + * Disables the interrupts for the vpath +*/ +static void vxge_vpath_intr_disable(struct vxgedev *vdev, int vp_id) +{ + struct vxge_vpath *vpath = &vdev->vpaths[vp_id]; + struct __vxge_hw_device *hldev; + int msix_id; + + hldev = pci_get_drvdata(vdev->pdev); + + vxge_hw_vpath_wait_receive_idle(hldev, vpath->device_id); + + vxge_hw_vpath_intr_disable(vpath->handle); + + if (vdev->config.intr_type == INTA) + vxge_hw_vpath_inta_mask_tx_rx(vpath->handle); + else { + msix_id = vpath->device_id * VXGE_HW_VPATH_MSIX_ACTIVE; + vxge_hw_vpath_msix_mask(vpath->handle, msix_id); + vxge_hw_vpath_msix_mask(vpath->handle, msix_id + 1); + + /* disable the alarm vector */ + msix_id = (vpath->handle->vpath->hldev->first_vp_id * + VXGE_HW_VPATH_MSIX_ACTIVE) + VXGE_ALARM_MSIX_ID; + vxge_hw_vpath_msix_mask(vpath->handle, msix_id); + } +} + +/* list all mac addresses from DA table */ +static enum vxge_hw_status +vxge_search_mac_addr_in_da_table(struct vxge_vpath *vpath, struct macInfo *mac) +{ + enum vxge_hw_status status = VXGE_HW_OK; + unsigned char macmask[ETH_ALEN]; + unsigned char macaddr[ETH_ALEN]; + + status = vxge_hw_vpath_mac_addr_get(vpath->handle, + macaddr, macmask); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "DA config list entry failed for vpath:%d", + vpath->device_id); + return status; + } + + while (!ether_addr_equal(mac->macaddr, macaddr)) { + status = vxge_hw_vpath_mac_addr_get_next(vpath->handle, + macaddr, macmask); + if (status != VXGE_HW_OK) + break; + } + + return status; +} + +/* Store all mac addresses from the list to the DA table */ +static enum vxge_hw_status vxge_restore_vpath_mac_addr(struct vxge_vpath *vpath) +{ + enum vxge_hw_status status = VXGE_HW_OK; + struct macInfo mac_info; + u8 *mac_address = NULL; + struct list_head *entry, *next; + + memset(&mac_info, 0, sizeof(struct macInfo)); + + if (vpath->is_open) { + list_for_each_safe(entry, next, &vpath->mac_addr_list) { + mac_address = + (u8 *)& + ((struct vxge_mac_addrs *)entry)->macaddr; + memcpy(mac_info.macaddr, mac_address, ETH_ALEN); + ((struct vxge_mac_addrs *)entry)->state = + VXGE_LL_MAC_ADDR_IN_DA_TABLE; + /* does this mac address already exist in da table? */ + status = vxge_search_mac_addr_in_da_table(vpath, + &mac_info); + if (status != VXGE_HW_OK) { + /* Add this mac address to the DA table */ + status = vxge_hw_vpath_mac_addr_add( + vpath->handle, mac_info.macaddr, + mac_info.macmask, + VXGE_HW_VPATH_MAC_ADDR_ADD_DUPLICATE); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "DA add entry failed for vpath:%d", + vpath->device_id); + ((struct vxge_mac_addrs *)entry)->state + = VXGE_LL_MAC_ADDR_IN_LIST; + } + } + } + } + + return status; +} + +/* Store all vlan ids from the list to the vid table */ +static enum vxge_hw_status +vxge_restore_vpath_vid_table(struct vxge_vpath *vpath) +{ + enum vxge_hw_status status = VXGE_HW_OK; + struct vxgedev *vdev = vpath->vdev; + u16 vid; + + if (!vpath->is_open) + return status; + + for_each_set_bit(vid, vdev->active_vlans, VLAN_N_VID) + status = vxge_hw_vpath_vid_add(vpath->handle, vid); + + return status; +} + +/* + * vxge_reset_vpath + * @vdev: pointer to vdev + * @vp_id: vpath to reset + * + * Resets the vpath +*/ +static int vxge_reset_vpath(struct vxgedev *vdev, int vp_id) +{ + enum vxge_hw_status status = VXGE_HW_OK; + struct vxge_vpath *vpath = &vdev->vpaths[vp_id]; + int ret = 0; + + /* check if device is down already */ + if (unlikely(!is_vxge_card_up(vdev))) + return 0; + + /* is device reset already scheduled */ + if (test_bit(__VXGE_STATE_RESET_CARD, &vdev->state)) + return 0; + + if (vpath->handle) { + if (vxge_hw_vpath_reset(vpath->handle) == VXGE_HW_OK) { + if (is_vxge_card_up(vdev) && + vxge_hw_vpath_recover_from_reset(vpath->handle) + != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "vxge_hw_vpath_recover_from_reset" + "failed for vpath:%d", vp_id); + return status; + } + } else { + vxge_debug_init(VXGE_ERR, + "vxge_hw_vpath_reset failed for" + "vpath:%d", vp_id); + return status; + } + } else + return VXGE_HW_FAIL; + + vxge_restore_vpath_mac_addr(vpath); + vxge_restore_vpath_vid_table(vpath); + + /* Enable all broadcast */ + vxge_hw_vpath_bcast_enable(vpath->handle); + + /* Enable all multicast */ + if (vdev->all_multi_flg) { + status = vxge_hw_vpath_mcast_enable(vpath->handle); + if (status != VXGE_HW_OK) + vxge_debug_init(VXGE_ERR, + "%s:%d Enabling multicast failed", + __func__, __LINE__); + } + + /* Enable the interrupts */ + vxge_vpath_intr_enable(vdev, vp_id); + + smp_wmb(); + + /* Enable the flow of traffic through the vpath */ + vxge_hw_vpath_enable(vpath->handle); + + smp_wmb(); + vxge_hw_vpath_rx_doorbell_init(vpath->handle); + vpath->ring.last_status = VXGE_HW_OK; + + /* Vpath reset done */ + clear_bit(vp_id, &vdev->vp_reset); + + /* Start the vpath queue */ + if (netif_tx_queue_stopped(vpath->fifo.txq)) + netif_tx_wake_queue(vpath->fifo.txq); + + return ret; +} + +/* Configure CI */ +static void vxge_config_ci_for_tti_rti(struct vxgedev *vdev) +{ + int i = 0; + + /* Enable CI for RTI */ + if (vdev->config.intr_type == MSI_X) { + for (i = 0; i < vdev->no_of_vpath; i++) { + struct __vxge_hw_ring *hw_ring; + + hw_ring = vdev->vpaths[i].ring.handle; + vxge_hw_vpath_dynamic_rti_ci_set(hw_ring); + } + } + + /* Enable CI for TTI */ + for (i = 0; i < vdev->no_of_vpath; i++) { + struct __vxge_hw_fifo *hw_fifo = vdev->vpaths[i].fifo.handle; + vxge_hw_vpath_tti_ci_set(hw_fifo); + /* + * For Inta (with or without napi), Set CI ON for only one + * vpath. (Have only one free running timer). + */ + if ((vdev->config.intr_type == INTA) && (i == 0)) + break; + } + + return; +} + +static int do_vxge_reset(struct vxgedev *vdev, int event) +{ + enum vxge_hw_status status; + int ret = 0, vp_id, i; + + vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__); + + if ((event == VXGE_LL_FULL_RESET) || (event == VXGE_LL_START_RESET)) { + /* check if device is down already */ + if (unlikely(!is_vxge_card_up(vdev))) + return 0; + + /* is reset already scheduled */ + if (test_and_set_bit(__VXGE_STATE_RESET_CARD, &vdev->state)) + return 0; + } + + if (event == VXGE_LL_FULL_RESET) { + netif_carrier_off(vdev->ndev); + + /* wait for all the vpath reset to complete */ + for (vp_id = 0; vp_id < vdev->no_of_vpath; vp_id++) { + while (test_bit(vp_id, &vdev->vp_reset)) + msleep(50); + } + + netif_carrier_on(vdev->ndev); + + /* if execution mode is set to debug, don't reset the adapter */ + if (unlikely(vdev->exec_mode)) { + vxge_debug_init(VXGE_ERR, + "%s: execution mode is debug, returning..", + vdev->ndev->name); + clear_bit(__VXGE_STATE_CARD_UP, &vdev->state); + netif_tx_stop_all_queues(vdev->ndev); + return 0; + } + } + + if (event == VXGE_LL_FULL_RESET) { + vxge_hw_device_wait_receive_idle(vdev->devh); + vxge_hw_device_intr_disable(vdev->devh); + + switch (vdev->cric_err_event) { + case VXGE_HW_EVENT_UNKNOWN: + netif_tx_stop_all_queues(vdev->ndev); + vxge_debug_init(VXGE_ERR, + "fatal: %s: Disabling device due to" + "unknown error", + vdev->ndev->name); + ret = -EPERM; + goto out; + case VXGE_HW_EVENT_RESET_START: + break; + case VXGE_HW_EVENT_RESET_COMPLETE: + case VXGE_HW_EVENT_LINK_DOWN: + case VXGE_HW_EVENT_LINK_UP: + case VXGE_HW_EVENT_ALARM_CLEARED: + case VXGE_HW_EVENT_ECCERR: + case VXGE_HW_EVENT_MRPCIM_ECCERR: + ret = -EPERM; + goto out; + case VXGE_HW_EVENT_FIFO_ERR: + case VXGE_HW_EVENT_VPATH_ERR: + break; + case VXGE_HW_EVENT_CRITICAL_ERR: + netif_tx_stop_all_queues(vdev->ndev); + vxge_debug_init(VXGE_ERR, + "fatal: %s: Disabling device due to" + "serious error", + vdev->ndev->name); + /* SOP or device reset required */ + /* This event is not currently used */ + ret = -EPERM; + goto out; + case VXGE_HW_EVENT_SERR: + netif_tx_stop_all_queues(vdev->ndev); + vxge_debug_init(VXGE_ERR, + "fatal: %s: Disabling device due to" + "serious error", + vdev->ndev->name); + ret = -EPERM; + goto out; + case VXGE_HW_EVENT_SRPCIM_SERR: + case VXGE_HW_EVENT_MRPCIM_SERR: + ret = -EPERM; + goto out; + case VXGE_HW_EVENT_SLOT_FREEZE: + netif_tx_stop_all_queues(vdev->ndev); + vxge_debug_init(VXGE_ERR, + "fatal: %s: Disabling device due to" + "slot freeze", + vdev->ndev->name); + ret = -EPERM; + goto out; + default: + break; + + } + } + + if ((event == VXGE_LL_FULL_RESET) || (event == VXGE_LL_START_RESET)) + netif_tx_stop_all_queues(vdev->ndev); + + if (event == VXGE_LL_FULL_RESET) { + status = vxge_reset_all_vpaths(vdev); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "fatal: %s: can not reset vpaths", + vdev->ndev->name); + ret = -EPERM; + goto out; + } + } + + if (event == VXGE_LL_COMPL_RESET) { + for (i = 0; i < vdev->no_of_vpath; i++) + if (vdev->vpaths[i].handle) { + if (vxge_hw_vpath_recover_from_reset( + vdev->vpaths[i].handle) + != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "vxge_hw_vpath_recover_" + "from_reset failed for vpath: " + "%d", i); + ret = -EPERM; + goto out; + } + } else { + vxge_debug_init(VXGE_ERR, + "vxge_hw_vpath_reset failed for " + "vpath:%d", i); + ret = -EPERM; + goto out; + } + } + + if ((event == VXGE_LL_FULL_RESET) || (event == VXGE_LL_COMPL_RESET)) { + /* Reprogram the DA table with populated mac addresses */ + for (vp_id = 0; vp_id < vdev->no_of_vpath; vp_id++) { + vxge_restore_vpath_mac_addr(&vdev->vpaths[vp_id]); + vxge_restore_vpath_vid_table(&vdev->vpaths[vp_id]); + } + + /* enable vpath interrupts */ + for (i = 0; i < vdev->no_of_vpath; i++) + vxge_vpath_intr_enable(vdev, i); + + vxge_hw_device_intr_enable(vdev->devh); + + smp_wmb(); + + /* Indicate card up */ + set_bit(__VXGE_STATE_CARD_UP, &vdev->state); + + /* Get the traffic to flow through the vpaths */ + for (i = 0; i < vdev->no_of_vpath; i++) { + vxge_hw_vpath_enable(vdev->vpaths[i].handle); + smp_wmb(); + vxge_hw_vpath_rx_doorbell_init(vdev->vpaths[i].handle); + } + + netif_tx_wake_all_queues(vdev->ndev); + } + + /* configure CI */ + vxge_config_ci_for_tti_rti(vdev); + +out: + vxge_debug_entryexit(VXGE_TRACE, + "%s:%d Exiting...", __func__, __LINE__); + + /* Indicate reset done */ + if ((event == VXGE_LL_FULL_RESET) || (event == VXGE_LL_COMPL_RESET)) + clear_bit(__VXGE_STATE_RESET_CARD, &vdev->state); + return ret; +} + +/* + * vxge_reset + * @vdev: pointer to ll device + * + * driver may reset the chip on events of serr, eccerr, etc + */ +static void vxge_reset(struct work_struct *work) +{ + struct vxgedev *vdev = container_of(work, struct vxgedev, reset_task); + + if (!netif_running(vdev->ndev)) + return; + + do_vxge_reset(vdev, VXGE_LL_FULL_RESET); +} + +/** + * vxge_poll - Receive handler when Receive Polling is used. + * @dev: pointer to the device structure. + * @budget: Number of packets budgeted to be processed in this iteration. + * + * This function comes into picture only if Receive side is being handled + * through polling (called NAPI in linux). It mostly does what the normal + * Rx interrupt handler does in terms of descriptor and packet processing + * but not in an interrupt context. Also it will process a specified number + * of packets at most in one iteration. This value is passed down by the + * kernel as the function argument 'budget'. + */ +static int vxge_poll_msix(struct napi_struct *napi, int budget) +{ + struct vxge_ring *ring = container_of(napi, struct vxge_ring, napi); + int pkts_processed; + int budget_org = budget; + + ring->budget = budget; + ring->pkts_processed = 0; + vxge_hw_vpath_poll_rx(ring->handle); + pkts_processed = ring->pkts_processed; + + if (ring->pkts_processed < budget_org) { + napi_complete(napi); + + /* Re enable the Rx interrupts for the vpath */ + vxge_hw_channel_msix_unmask( + (struct __vxge_hw_channel *)ring->handle, + ring->rx_vector_no); + mmiowb(); + } + + /* We are copying and returning the local variable, in case if after + * clearing the msix interrupt above, if the interrupt fires right + * away which can preempt this NAPI thread */ + return pkts_processed; +} + +static int vxge_poll_inta(struct napi_struct *napi, int budget) +{ + struct vxgedev *vdev = container_of(napi, struct vxgedev, napi); + int pkts_processed = 0; + int i; + int budget_org = budget; + struct vxge_ring *ring; + + struct __vxge_hw_device *hldev = pci_get_drvdata(vdev->pdev); + + for (i = 0; i < vdev->no_of_vpath; i++) { + ring = &vdev->vpaths[i].ring; + ring->budget = budget; + ring->pkts_processed = 0; + vxge_hw_vpath_poll_rx(ring->handle); + pkts_processed += ring->pkts_processed; + budget -= ring->pkts_processed; + if (budget <= 0) + break; + } + + VXGE_COMPLETE_ALL_TX(vdev); + + if (pkts_processed < budget_org) { + napi_complete(napi); + /* Re enable the Rx interrupts for the ring */ + vxge_hw_device_unmask_all(hldev); + vxge_hw_device_flush_io(hldev); + } + + return pkts_processed; +} + +#ifdef CONFIG_NET_POLL_CONTROLLER +/** + * vxge_netpoll - netpoll event handler entry point + * @dev : pointer to the device structure. + * Description: + * This function will be called by upper layer to check for events on the + * interface in situations where interrupts are disabled. It is used for + * specific in-kernel networking tasks, such as remote consoles and kernel + * debugging over the network (example netdump in RedHat). + */ +static void vxge_netpoll(struct net_device *dev) +{ + struct vxgedev *vdev = netdev_priv(dev); + struct pci_dev *pdev = vdev->pdev; + struct __vxge_hw_device *hldev = pci_get_drvdata(pdev); + const int irq = pdev->irq; + + vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__); + + if (pci_channel_offline(pdev)) + return; + + disable_irq(irq); + vxge_hw_device_clear_tx_rx(hldev); + + vxge_hw_device_clear_tx_rx(hldev); + VXGE_COMPLETE_ALL_RX(vdev); + VXGE_COMPLETE_ALL_TX(vdev); + + enable_irq(irq); + + vxge_debug_entryexit(VXGE_TRACE, + "%s:%d Exiting...", __func__, __LINE__); +} +#endif + +/* RTH configuration */ +static enum vxge_hw_status vxge_rth_configure(struct vxgedev *vdev) +{ + enum vxge_hw_status status = VXGE_HW_OK; + struct vxge_hw_rth_hash_types hash_types; + u8 itable[256] = {0}; /* indirection table */ + u8 mtable[256] = {0}; /* CPU to vpath mapping */ + int index; + + /* + * Filling + * - itable with bucket numbers + * - mtable with bucket-to-vpath mapping + */ + for (index = 0; index < (1 << vdev->config.rth_bkt_sz); index++) { + itable[index] = index; + mtable[index] = index % vdev->no_of_vpath; + } + + /* set indirection table, bucket-to-vpath mapping */ + status = vxge_hw_vpath_rts_rth_itable_set(vdev->vp_handles, + vdev->no_of_vpath, + mtable, itable, + vdev->config.rth_bkt_sz); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "RTH indirection table configuration failed " + "for vpath:%d", vdev->vpaths[0].device_id); + return status; + } + + /* Fill RTH hash types */ + hash_types.hash_type_tcpipv4_en = vdev->config.rth_hash_type_tcpipv4; + hash_types.hash_type_ipv4_en = vdev->config.rth_hash_type_ipv4; + hash_types.hash_type_tcpipv6_en = vdev->config.rth_hash_type_tcpipv6; + hash_types.hash_type_ipv6_en = vdev->config.rth_hash_type_ipv6; + hash_types.hash_type_tcpipv6ex_en = + vdev->config.rth_hash_type_tcpipv6ex; + hash_types.hash_type_ipv6ex_en = vdev->config.rth_hash_type_ipv6ex; + + /* + * Because the itable_set() method uses the active_table field + * for the target virtual path the RTH config should be updated + * for all VPATHs. The h/w only uses the lowest numbered VPATH + * when steering frames. + */ + for (index = 0; index < vdev->no_of_vpath; index++) { + status = vxge_hw_vpath_rts_rth_set( + vdev->vpaths[index].handle, + vdev->config.rth_algorithm, + &hash_types, + vdev->config.rth_bkt_sz); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "RTH configuration failed for vpath:%d", + vdev->vpaths[index].device_id); + return status; + } + } + + return status; +} + +/* reset vpaths */ +static enum vxge_hw_status vxge_reset_all_vpaths(struct vxgedev *vdev) +{ + enum vxge_hw_status status = VXGE_HW_OK; + struct vxge_vpath *vpath; + int i; + + for (i = 0; i < vdev->no_of_vpath; i++) { + vpath = &vdev->vpaths[i]; + if (vpath->handle) { + if (vxge_hw_vpath_reset(vpath->handle) == VXGE_HW_OK) { + if (is_vxge_card_up(vdev) && + vxge_hw_vpath_recover_from_reset( + vpath->handle) != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "vxge_hw_vpath_recover_" + "from_reset failed for vpath: " + "%d", i); + return status; + } + } else { + vxge_debug_init(VXGE_ERR, + "vxge_hw_vpath_reset failed for " + "vpath:%d", i); + return status; + } + } + } + + return status; +} + +/* close vpaths */ +static void vxge_close_vpaths(struct vxgedev *vdev, int index) +{ + struct vxge_vpath *vpath; + int i; + + for (i = index; i < vdev->no_of_vpath; i++) { + vpath = &vdev->vpaths[i]; + + if (vpath->handle && vpath->is_open) { + vxge_hw_vpath_close(vpath->handle); + vdev->stats.vpaths_open--; + } + vpath->is_open = 0; + vpath->handle = NULL; + } +} + +/* open vpaths */ +static int vxge_open_vpaths(struct vxgedev *vdev) +{ + struct vxge_hw_vpath_attr attr; + enum vxge_hw_status status; + struct vxge_vpath *vpath; + u32 vp_id = 0; + int i; + + for (i = 0; i < vdev->no_of_vpath; i++) { + vpath = &vdev->vpaths[i]; + vxge_assert(vpath->is_configured); + + if (!vdev->titan1) { + struct vxge_hw_vp_config *vcfg; + vcfg = &vdev->devh->config.vp_config[vpath->device_id]; + + vcfg->rti.urange_a = RTI_T1A_RX_URANGE_A; + vcfg->rti.urange_b = RTI_T1A_RX_URANGE_B; + vcfg->rti.urange_c = RTI_T1A_RX_URANGE_C; + vcfg->tti.uec_a = TTI_T1A_TX_UFC_A; + vcfg->tti.uec_b = TTI_T1A_TX_UFC_B; + vcfg->tti.uec_c = TTI_T1A_TX_UFC_C(vdev->mtu); + vcfg->tti.uec_d = TTI_T1A_TX_UFC_D(vdev->mtu); + vcfg->tti.ltimer_val = VXGE_T1A_TTI_LTIMER_VAL; + vcfg->tti.rtimer_val = VXGE_T1A_TTI_RTIMER_VAL; + } + + attr.vp_id = vpath->device_id; + attr.fifo_attr.callback = vxge_xmit_compl; + attr.fifo_attr.txdl_term = vxge_tx_term; + attr.fifo_attr.per_txdl_space = sizeof(struct vxge_tx_priv); + attr.fifo_attr.userdata = &vpath->fifo; + + attr.ring_attr.callback = vxge_rx_1b_compl; + attr.ring_attr.rxd_init = vxge_rx_initial_replenish; + attr.ring_attr.rxd_term = vxge_rx_term; + attr.ring_attr.per_rxd_space = sizeof(struct vxge_rx_priv); + attr.ring_attr.userdata = &vpath->ring; + + vpath->ring.ndev = vdev->ndev; + vpath->ring.pdev = vdev->pdev; + + status = vxge_hw_vpath_open(vdev->devh, &attr, &vpath->handle); + if (status == VXGE_HW_OK) { + vpath->fifo.handle = + (struct __vxge_hw_fifo *)attr.fifo_attr.userdata; + vpath->ring.handle = + (struct __vxge_hw_ring *)attr.ring_attr.userdata; + vpath->fifo.tx_steering_type = + vdev->config.tx_steering_type; + vpath->fifo.ndev = vdev->ndev; + vpath->fifo.pdev = vdev->pdev; + + u64_stats_init(&vpath->fifo.stats.syncp); + u64_stats_init(&vpath->ring.stats.syncp); + + if (vdev->config.tx_steering_type) + vpath->fifo.txq = + netdev_get_tx_queue(vdev->ndev, i); + else + vpath->fifo.txq = + netdev_get_tx_queue(vdev->ndev, 0); + vpath->fifo.indicate_max_pkts = + vdev->config.fifo_indicate_max_pkts; + vpath->fifo.tx_vector_no = 0; + vpath->ring.rx_vector_no = 0; + vpath->ring.rx_hwts = vdev->rx_hwts; + vpath->is_open = 1; + vdev->vp_handles[i] = vpath->handle; + vpath->ring.vlan_tag_strip = vdev->vlan_tag_strip; + vdev->stats.vpaths_open++; + } else { + vdev->stats.vpath_open_fail++; + vxge_debug_init(VXGE_ERR, "%s: vpath: %d failed to " + "open with status: %d", + vdev->ndev->name, vpath->device_id, + status); + vxge_close_vpaths(vdev, 0); + return -EPERM; + } + + vp_id = vpath->handle->vpath->vp_id; + vdev->vpaths_deployed |= vxge_mBIT(vp_id); + } + + return VXGE_HW_OK; +} + +/** + * adaptive_coalesce_tx_interrupts - Changes the interrupt coalescing + * if the interrupts are not within a range + * @fifo: pointer to transmit fifo structure + * Description: The function changes boundary timer and restriction timer + * value depends on the traffic + * Return Value: None + */ +static void adaptive_coalesce_tx_interrupts(struct vxge_fifo *fifo) +{ + fifo->interrupt_count++; + if (time_before(fifo->jiffies + HZ / 100, jiffies)) { + struct __vxge_hw_fifo *hw_fifo = fifo->handle; + + fifo->jiffies = jiffies; + if (fifo->interrupt_count > VXGE_T1A_MAX_TX_INTERRUPT_COUNT && + hw_fifo->rtimer != VXGE_TTI_RTIMER_ADAPT_VAL) { + hw_fifo->rtimer = VXGE_TTI_RTIMER_ADAPT_VAL; + vxge_hw_vpath_dynamic_tti_rtimer_set(hw_fifo); + } else if (hw_fifo->rtimer != 0) { + hw_fifo->rtimer = 0; + vxge_hw_vpath_dynamic_tti_rtimer_set(hw_fifo); + } + fifo->interrupt_count = 0; + } +} + +/** + * adaptive_coalesce_rx_interrupts - Changes the interrupt coalescing + * if the interrupts are not within a range + * @ring: pointer to receive ring structure + * Description: The function increases of decreases the packet counts within + * the ranges of traffic utilization, if the interrupts due to this ring are + * not within a fixed range. + * Return Value: Nothing + */ +static void adaptive_coalesce_rx_interrupts(struct vxge_ring *ring) +{ + ring->interrupt_count++; + if (time_before(ring->jiffies + HZ / 100, jiffies)) { + struct __vxge_hw_ring *hw_ring = ring->handle; + + ring->jiffies = jiffies; + if (ring->interrupt_count > VXGE_T1A_MAX_INTERRUPT_COUNT && + hw_ring->rtimer != VXGE_RTI_RTIMER_ADAPT_VAL) { + hw_ring->rtimer = VXGE_RTI_RTIMER_ADAPT_VAL; + vxge_hw_vpath_dynamic_rti_rtimer_set(hw_ring); + } else if (hw_ring->rtimer != 0) { + hw_ring->rtimer = 0; + vxge_hw_vpath_dynamic_rti_rtimer_set(hw_ring); + } + ring->interrupt_count = 0; + } +} + +/* + * vxge_isr_napi + * @irq: the irq of the device. + * @dev_id: a void pointer to the hldev structure of the Titan device + * @ptregs: pointer to the registers pushed on the stack. + * + * This function is the ISR handler of the device when napi is enabled. It + * identifies the reason for the interrupt and calls the relevant service + * routines. + */ +static irqreturn_t vxge_isr_napi(int irq, void *dev_id) +{ + struct net_device *dev; + struct __vxge_hw_device *hldev; + u64 reason; + enum vxge_hw_status status; + struct vxgedev *vdev = (struct vxgedev *)dev_id; + + vxge_debug_intr(VXGE_TRACE, "%s:%d", __func__, __LINE__); + + dev = vdev->ndev; + hldev = pci_get_drvdata(vdev->pdev); + + if (pci_channel_offline(vdev->pdev)) + return IRQ_NONE; + + if (unlikely(!is_vxge_card_up(vdev))) + return IRQ_HANDLED; + + status = vxge_hw_device_begin_irq(hldev, vdev->exec_mode, &reason); + if (status == VXGE_HW_OK) { + vxge_hw_device_mask_all(hldev); + + if (reason & + VXGE_HW_TITAN_GENERAL_INT_STATUS_VPATH_TRAFFIC_INT( + vdev->vpaths_deployed >> + (64 - VXGE_HW_MAX_VIRTUAL_PATHS))) { + + vxge_hw_device_clear_tx_rx(hldev); + napi_schedule(&vdev->napi); + vxge_debug_intr(VXGE_TRACE, + "%s:%d Exiting...", __func__, __LINE__); + return IRQ_HANDLED; + } else + vxge_hw_device_unmask_all(hldev); + } else if (unlikely((status == VXGE_HW_ERR_VPATH) || + (status == VXGE_HW_ERR_CRITICAL) || + (status == VXGE_HW_ERR_FIFO))) { + vxge_hw_device_mask_all(hldev); + vxge_hw_device_flush_io(hldev); + return IRQ_HANDLED; + } else if (unlikely(status == VXGE_HW_ERR_SLOT_FREEZE)) + return IRQ_HANDLED; + + vxge_debug_intr(VXGE_TRACE, "%s:%d Exiting...", __func__, __LINE__); + return IRQ_NONE; +} + +#ifdef CONFIG_PCI_MSI + +static irqreturn_t vxge_tx_msix_handle(int irq, void *dev_id) +{ + struct vxge_fifo *fifo = (struct vxge_fifo *)dev_id; + + adaptive_coalesce_tx_interrupts(fifo); + + vxge_hw_channel_msix_mask((struct __vxge_hw_channel *)fifo->handle, + fifo->tx_vector_no); + + vxge_hw_channel_msix_clear((struct __vxge_hw_channel *)fifo->handle, + fifo->tx_vector_no); + + VXGE_COMPLETE_VPATH_TX(fifo); + + vxge_hw_channel_msix_unmask((struct __vxge_hw_channel *)fifo->handle, + fifo->tx_vector_no); + + mmiowb(); + + return IRQ_HANDLED; +} + +static irqreturn_t vxge_rx_msix_napi_handle(int irq, void *dev_id) +{ + struct vxge_ring *ring = (struct vxge_ring *)dev_id; + + adaptive_coalesce_rx_interrupts(ring); + + vxge_hw_channel_msix_mask((struct __vxge_hw_channel *)ring->handle, + ring->rx_vector_no); + + vxge_hw_channel_msix_clear((struct __vxge_hw_channel *)ring->handle, + ring->rx_vector_no); + + napi_schedule(&ring->napi); + return IRQ_HANDLED; +} + +static irqreturn_t +vxge_alarm_msix_handle(int irq, void *dev_id) +{ + int i; + enum vxge_hw_status status; + struct vxge_vpath *vpath = (struct vxge_vpath *)dev_id; + struct vxgedev *vdev = vpath->vdev; + int msix_id = (vpath->handle->vpath->vp_id * + VXGE_HW_VPATH_MSIX_ACTIVE) + VXGE_ALARM_MSIX_ID; + + for (i = 0; i < vdev->no_of_vpath; i++) { + /* Reduce the chance of losing alarm interrupts by masking + * the vector. A pending bit will be set if an alarm is + * generated and on unmask the interrupt will be fired. + */ + vxge_hw_vpath_msix_mask(vdev->vpaths[i].handle, msix_id); + vxge_hw_vpath_msix_clear(vdev->vpaths[i].handle, msix_id); + mmiowb(); + + status = vxge_hw_vpath_alarm_process(vdev->vpaths[i].handle, + vdev->exec_mode); + if (status == VXGE_HW_OK) { + vxge_hw_vpath_msix_unmask(vdev->vpaths[i].handle, + msix_id); + mmiowb(); + continue; + } + vxge_debug_intr(VXGE_ERR, + "%s: vxge_hw_vpath_alarm_process failed %x ", + VXGE_DRIVER_NAME, status); + } + return IRQ_HANDLED; +} + +static int vxge_alloc_msix(struct vxgedev *vdev) +{ + int j, i, ret = 0; + int msix_intr_vect = 0, temp; + vdev->intr_cnt = 0; + +start: + /* Tx/Rx MSIX Vectors count */ + vdev->intr_cnt = vdev->no_of_vpath * 2; + + /* Alarm MSIX Vectors count */ + vdev->intr_cnt++; + + vdev->entries = kcalloc(vdev->intr_cnt, sizeof(struct msix_entry), + GFP_KERNEL); + if (!vdev->entries) { + vxge_debug_init(VXGE_ERR, + "%s: memory allocation failed", + VXGE_DRIVER_NAME); + ret = -ENOMEM; + goto alloc_entries_failed; + } + + vdev->vxge_entries = kcalloc(vdev->intr_cnt, + sizeof(struct vxge_msix_entry), + GFP_KERNEL); + if (!vdev->vxge_entries) { + vxge_debug_init(VXGE_ERR, "%s: memory allocation failed", + VXGE_DRIVER_NAME); + ret = -ENOMEM; + goto alloc_vxge_entries_failed; + } + + for (i = 0, j = 0; i < vdev->no_of_vpath; i++) { + + msix_intr_vect = i * VXGE_HW_VPATH_MSIX_ACTIVE; + + /* Initialize the fifo vector */ + vdev->entries[j].entry = msix_intr_vect; + vdev->vxge_entries[j].entry = msix_intr_vect; + vdev->vxge_entries[j].in_use = 0; + j++; + + /* Initialize the ring vector */ + vdev->entries[j].entry = msix_intr_vect + 1; + vdev->vxge_entries[j].entry = msix_intr_vect + 1; + vdev->vxge_entries[j].in_use = 0; + j++; + } + + /* Initialize the alarm vector */ + vdev->entries[j].entry = VXGE_ALARM_MSIX_ID; + vdev->vxge_entries[j].entry = VXGE_ALARM_MSIX_ID; + vdev->vxge_entries[j].in_use = 0; + + ret = pci_enable_msix_range(vdev->pdev, + vdev->entries, 3, vdev->intr_cnt); + if (ret < 0) { + ret = -ENODEV; + goto enable_msix_failed; + } else if (ret < vdev->intr_cnt) { + pci_disable_msix(vdev->pdev); + + vxge_debug_init(VXGE_ERR, + "%s: MSI-X enable failed for %d vectors, ret: %d", + VXGE_DRIVER_NAME, vdev->intr_cnt, ret); + if (max_config_vpath != VXGE_USE_DEFAULT) { + ret = -ENODEV; + goto enable_msix_failed; + } + + kfree(vdev->entries); + kfree(vdev->vxge_entries); + vdev->entries = NULL; + vdev->vxge_entries = NULL; + /* Try with less no of vector by reducing no of vpaths count */ + temp = (ret - 1)/2; + vxge_close_vpaths(vdev, temp); + vdev->no_of_vpath = temp; + goto start; + } + return 0; + +enable_msix_failed: + kfree(vdev->vxge_entries); +alloc_vxge_entries_failed: + kfree(vdev->entries); +alloc_entries_failed: + return ret; +} + +static int vxge_enable_msix(struct vxgedev *vdev) +{ + + int i, ret = 0; + /* 0 - Tx, 1 - Rx */ + int tim_msix_id[4] = {0, 1, 0, 0}; + + vdev->intr_cnt = 0; + + /* allocate msix vectors */ + ret = vxge_alloc_msix(vdev); + if (!ret) { + for (i = 0; i < vdev->no_of_vpath; i++) { + struct vxge_vpath *vpath = &vdev->vpaths[i]; + + /* If fifo or ring are not enabled, the MSIX vector for + * it should be set to 0. + */ + vpath->ring.rx_vector_no = (vpath->device_id * + VXGE_HW_VPATH_MSIX_ACTIVE) + 1; + + vpath->fifo.tx_vector_no = (vpath->device_id * + VXGE_HW_VPATH_MSIX_ACTIVE); + + vxge_hw_vpath_msix_set(vpath->handle, tim_msix_id, + VXGE_ALARM_MSIX_ID); + } + } + + return ret; +} + +static void vxge_rem_msix_isr(struct vxgedev *vdev) +{ + int intr_cnt; + + for (intr_cnt = 0; intr_cnt < (vdev->no_of_vpath * 2 + 1); + intr_cnt++) { + if (vdev->vxge_entries[intr_cnt].in_use) { + synchronize_irq(vdev->entries[intr_cnt].vector); + free_irq(vdev->entries[intr_cnt].vector, + vdev->vxge_entries[intr_cnt].arg); + vdev->vxge_entries[intr_cnt].in_use = 0; + } + } + + kfree(vdev->entries); + kfree(vdev->vxge_entries); + vdev->entries = NULL; + vdev->vxge_entries = NULL; + + if (vdev->config.intr_type == MSI_X) + pci_disable_msix(vdev->pdev); +} +#endif + +static void vxge_rem_isr(struct vxgedev *vdev) +{ +#ifdef CONFIG_PCI_MSI + if (vdev->config.intr_type == MSI_X) { + vxge_rem_msix_isr(vdev); + } else +#endif + if (vdev->config.intr_type == INTA) { + synchronize_irq(vdev->pdev->irq); + free_irq(vdev->pdev->irq, vdev); + } +} + +static int vxge_add_isr(struct vxgedev *vdev) +{ + int ret = 0; +#ifdef CONFIG_PCI_MSI + int vp_idx = 0, intr_idx = 0, intr_cnt = 0, msix_idx = 0, irq_req = 0; + int pci_fun = PCI_FUNC(vdev->pdev->devfn); + + if (vdev->config.intr_type == MSI_X) + ret = vxge_enable_msix(vdev); + + if (ret) { + vxge_debug_init(VXGE_ERR, + "%s: Enabling MSI-X Failed", VXGE_DRIVER_NAME); + vxge_debug_init(VXGE_ERR, + "%s: Defaulting to INTA", VXGE_DRIVER_NAME); + vdev->config.intr_type = INTA; + } + + if (vdev->config.intr_type == MSI_X) { + for (intr_idx = 0; + intr_idx < (vdev->no_of_vpath * + VXGE_HW_VPATH_MSIX_ACTIVE); intr_idx++) { + + msix_idx = intr_idx % VXGE_HW_VPATH_MSIX_ACTIVE; + irq_req = 0; + + switch (msix_idx) { + case 0: + snprintf(vdev->desc[intr_cnt], VXGE_INTR_STRLEN, + "%s:vxge:MSI-X %d - Tx - fn:%d vpath:%d", + vdev->ndev->name, + vdev->entries[intr_cnt].entry, + pci_fun, vp_idx); + ret = request_irq( + vdev->entries[intr_cnt].vector, + vxge_tx_msix_handle, 0, + vdev->desc[intr_cnt], + &vdev->vpaths[vp_idx].fifo); + vdev->vxge_entries[intr_cnt].arg = + &vdev->vpaths[vp_idx].fifo; + irq_req = 1; + break; + case 1: + snprintf(vdev->desc[intr_cnt], VXGE_INTR_STRLEN, + "%s:vxge:MSI-X %d - Rx - fn:%d vpath:%d", + vdev->ndev->name, + vdev->entries[intr_cnt].entry, + pci_fun, vp_idx); + ret = request_irq( + vdev->entries[intr_cnt].vector, + vxge_rx_msix_napi_handle, + 0, + vdev->desc[intr_cnt], + &vdev->vpaths[vp_idx].ring); + vdev->vxge_entries[intr_cnt].arg = + &vdev->vpaths[vp_idx].ring; + irq_req = 1; + break; + } + + if (ret) { + vxge_debug_init(VXGE_ERR, + "%s: MSIX - %d Registration failed", + vdev->ndev->name, intr_cnt); + vxge_rem_msix_isr(vdev); + vdev->config.intr_type = INTA; + vxge_debug_init(VXGE_ERR, + "%s: Defaulting to INTA" + , vdev->ndev->name); + goto INTA_MODE; + } + + if (irq_req) { + /* We requested for this msix interrupt */ + vdev->vxge_entries[intr_cnt].in_use = 1; + msix_idx += vdev->vpaths[vp_idx].device_id * + VXGE_HW_VPATH_MSIX_ACTIVE; + vxge_hw_vpath_msix_unmask( + vdev->vpaths[vp_idx].handle, + msix_idx); + intr_cnt++; + } + + /* Point to next vpath handler */ + if (((intr_idx + 1) % VXGE_HW_VPATH_MSIX_ACTIVE == 0) && + (vp_idx < (vdev->no_of_vpath - 1))) + vp_idx++; + } + + intr_cnt = vdev->no_of_vpath * 2; + snprintf(vdev->desc[intr_cnt], VXGE_INTR_STRLEN, + "%s:vxge:MSI-X %d - Alarm - fn:%d", + vdev->ndev->name, + vdev->entries[intr_cnt].entry, + pci_fun); + /* For Alarm interrupts */ + ret = request_irq(vdev->entries[intr_cnt].vector, + vxge_alarm_msix_handle, 0, + vdev->desc[intr_cnt], + &vdev->vpaths[0]); + if (ret) { + vxge_debug_init(VXGE_ERR, + "%s: MSIX - %d Registration failed", + vdev->ndev->name, intr_cnt); + vxge_rem_msix_isr(vdev); + vdev->config.intr_type = INTA; + vxge_debug_init(VXGE_ERR, + "%s: Defaulting to INTA", + vdev->ndev->name); + goto INTA_MODE; + } + + msix_idx = (vdev->vpaths[0].handle->vpath->vp_id * + VXGE_HW_VPATH_MSIX_ACTIVE) + VXGE_ALARM_MSIX_ID; + vxge_hw_vpath_msix_unmask(vdev->vpaths[vp_idx].handle, + msix_idx); + vdev->vxge_entries[intr_cnt].in_use = 1; + vdev->vxge_entries[intr_cnt].arg = &vdev->vpaths[0]; + } +INTA_MODE: +#endif + + if (vdev->config.intr_type == INTA) { + snprintf(vdev->desc[0], VXGE_INTR_STRLEN, + "%s:vxge:INTA", vdev->ndev->name); + vxge_hw_device_set_intr_type(vdev->devh, + VXGE_HW_INTR_MODE_IRQLINE); + + vxge_hw_vpath_tti_ci_set(vdev->vpaths[0].fifo.handle); + + ret = request_irq((int) vdev->pdev->irq, + vxge_isr_napi, + IRQF_SHARED, vdev->desc[0], vdev); + if (ret) { + vxge_debug_init(VXGE_ERR, + "%s %s-%d: ISR registration failed", + VXGE_DRIVER_NAME, "IRQ", vdev->pdev->irq); + return -ENODEV; + } + vxge_debug_init(VXGE_TRACE, + "new %s-%d line allocated", + "IRQ", vdev->pdev->irq); + } + + return VXGE_HW_OK; +} + +static void vxge_poll_vp_reset(unsigned long data) +{ + struct vxgedev *vdev = (struct vxgedev *)data; + int i, j = 0; + + for (i = 0; i < vdev->no_of_vpath; i++) { + if (test_bit(i, &vdev->vp_reset)) { + vxge_reset_vpath(vdev, i); + j++; + } + } + if (j && (vdev->config.intr_type != MSI_X)) { + vxge_hw_device_unmask_all(vdev->devh); + vxge_hw_device_flush_io(vdev->devh); + } + + mod_timer(&vdev->vp_reset_timer, jiffies + HZ / 2); +} + +static void vxge_poll_vp_lockup(unsigned long data) +{ + struct vxgedev *vdev = (struct vxgedev *)data; + enum vxge_hw_status status = VXGE_HW_OK; + struct vxge_vpath *vpath; + struct vxge_ring *ring; + int i; + unsigned long rx_frms; + + for (i = 0; i < vdev->no_of_vpath; i++) { + ring = &vdev->vpaths[i].ring; + + /* Truncated to machine word size number of frames */ + rx_frms = ACCESS_ONCE(ring->stats.rx_frms); + + /* Did this vpath received any packets */ + if (ring->stats.prev_rx_frms == rx_frms) { + status = vxge_hw_vpath_check_leak(ring->handle); + + /* Did it received any packets last time */ + if ((VXGE_HW_FAIL == status) && + (VXGE_HW_FAIL == ring->last_status)) { + + /* schedule vpath reset */ + if (!test_and_set_bit(i, &vdev->vp_reset)) { + vpath = &vdev->vpaths[i]; + + /* disable interrupts for this vpath */ + vxge_vpath_intr_disable(vdev, i); + + /* stop the queue for this vpath */ + netif_tx_stop_queue(vpath->fifo.txq); + continue; + } + } + } + ring->stats.prev_rx_frms = rx_frms; + ring->last_status = status; + } + + /* Check every 1 milli second */ + mod_timer(&vdev->vp_lockup_timer, jiffies + HZ / 1000); +} + +static netdev_features_t vxge_fix_features(struct net_device *dev, + netdev_features_t features) +{ + netdev_features_t changed = dev->features ^ features; + + /* Enabling RTH requires some of the logic in vxge_device_register and a + * vpath reset. Due to these restrictions, only allow modification + * while the interface is down. + */ + if ((changed & NETIF_F_RXHASH) && netif_running(dev)) + features ^= NETIF_F_RXHASH; + + return features; +} + +static int vxge_set_features(struct net_device *dev, netdev_features_t features) +{ + struct vxgedev *vdev = netdev_priv(dev); + netdev_features_t changed = dev->features ^ features; + + if (!(changed & NETIF_F_RXHASH)) + return 0; + + /* !netif_running() ensured by vxge_fix_features() */ + + vdev->devh->config.rth_en = !!(features & NETIF_F_RXHASH); + if (vxge_reset_all_vpaths(vdev) != VXGE_HW_OK) { + dev->features = features ^ NETIF_F_RXHASH; + vdev->devh->config.rth_en = !!(dev->features & NETIF_F_RXHASH); + return -EIO; + } + + return 0; +} + +/** + * vxge_open + * @dev: pointer to the device structure. + * + * This function is the open entry point of the driver. It mainly calls a + * function to allocate Rx buffers and inserts them into the buffer + * descriptors and then enables the Rx part of the NIC. + * Return value: '0' on success and an appropriate (-)ve integer as + * defined in errno.h file on failure. + */ +static int vxge_open(struct net_device *dev) +{ + enum vxge_hw_status status; + struct vxgedev *vdev; + struct __vxge_hw_device *hldev; + struct vxge_vpath *vpath; + int ret = 0; + int i; + u64 val64, function_mode; + + vxge_debug_entryexit(VXGE_TRACE, + "%s: %s:%d", dev->name, __func__, __LINE__); + + vdev = netdev_priv(dev); + hldev = pci_get_drvdata(vdev->pdev); + function_mode = vdev->config.device_hw_info.function_mode; + + /* make sure you have link off by default every time Nic is + * initialized */ + netif_carrier_off(dev); + + /* Open VPATHs */ + status = vxge_open_vpaths(vdev); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "%s: fatal: Vpath open failed", vdev->ndev->name); + ret = -EPERM; + goto out0; + } + + vdev->mtu = dev->mtu; + + status = vxge_add_isr(vdev); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "%s: fatal: ISR add failed", dev->name); + ret = -EPERM; + goto out1; + } + + if (vdev->config.intr_type != MSI_X) { + netif_napi_add(dev, &vdev->napi, vxge_poll_inta, + vdev->config.napi_weight); + napi_enable(&vdev->napi); + for (i = 0; i < vdev->no_of_vpath; i++) { + vpath = &vdev->vpaths[i]; + vpath->ring.napi_p = &vdev->napi; + } + } else { + for (i = 0; i < vdev->no_of_vpath; i++) { + vpath = &vdev->vpaths[i]; + netif_napi_add(dev, &vpath->ring.napi, + vxge_poll_msix, vdev->config.napi_weight); + napi_enable(&vpath->ring.napi); + vpath->ring.napi_p = &vpath->ring.napi; + } + } + + /* configure RTH */ + if (vdev->config.rth_steering) { + status = vxge_rth_configure(vdev); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "%s: fatal: RTH configuration failed", + dev->name); + ret = -EPERM; + goto out2; + } + } + printk(KERN_INFO "%s: Receive Hashing Offload %s\n", dev->name, + hldev->config.rth_en ? "enabled" : "disabled"); + + for (i = 0; i < vdev->no_of_vpath; i++) { + vpath = &vdev->vpaths[i]; + + /* set initial mtu before enabling the device */ + status = vxge_hw_vpath_mtu_set(vpath->handle, vdev->mtu); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "%s: fatal: can not set new MTU", dev->name); + ret = -EPERM; + goto out2; + } + } + + VXGE_DEVICE_DEBUG_LEVEL_SET(VXGE_TRACE, VXGE_COMPONENT_LL, vdev); + vxge_debug_init(vdev->level_trace, + "%s: MTU is %d", vdev->ndev->name, vdev->mtu); + VXGE_DEVICE_DEBUG_LEVEL_SET(VXGE_ERR, VXGE_COMPONENT_LL, vdev); + + /* Restore the DA, VID table and also multicast and promiscuous mode + * states + */ + if (vdev->all_multi_flg) { + for (i = 0; i < vdev->no_of_vpath; i++) { + vpath = &vdev->vpaths[i]; + vxge_restore_vpath_mac_addr(vpath); + vxge_restore_vpath_vid_table(vpath); + + status = vxge_hw_vpath_mcast_enable(vpath->handle); + if (status != VXGE_HW_OK) + vxge_debug_init(VXGE_ERR, + "%s:%d Enabling multicast failed", + __func__, __LINE__); + } + } + + /* Enable vpath to sniff all unicast/multicast traffic that not + * addressed to them. We allow promiscuous mode for PF only + */ + + val64 = 0; + for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) + val64 |= VXGE_HW_RXMAC_AUTHORIZE_ALL_ADDR_VP(i); + + vxge_hw_mgmt_reg_write(vdev->devh, + vxge_hw_mgmt_reg_type_mrpcim, + 0, + (ulong)offsetof(struct vxge_hw_mrpcim_reg, + rxmac_authorize_all_addr), + val64); + + vxge_hw_mgmt_reg_write(vdev->devh, + vxge_hw_mgmt_reg_type_mrpcim, + 0, + (ulong)offsetof(struct vxge_hw_mrpcim_reg, + rxmac_authorize_all_vid), + val64); + + vxge_set_multicast(dev); + + /* Enabling Bcast and mcast for all vpath */ + for (i = 0; i < vdev->no_of_vpath; i++) { + vpath = &vdev->vpaths[i]; + status = vxge_hw_vpath_bcast_enable(vpath->handle); + if (status != VXGE_HW_OK) + vxge_debug_init(VXGE_ERR, + "%s : Can not enable bcast for vpath " + "id %d", dev->name, i); + if (vdev->config.addr_learn_en) { + status = vxge_hw_vpath_mcast_enable(vpath->handle); + if (status != VXGE_HW_OK) + vxge_debug_init(VXGE_ERR, + "%s : Can not enable mcast for vpath " + "id %d", dev->name, i); + } + } + + vxge_hw_device_setpause_data(vdev->devh, 0, + vdev->config.tx_pause_enable, + vdev->config.rx_pause_enable); + + if (vdev->vp_reset_timer.function == NULL) + vxge_os_timer(&vdev->vp_reset_timer, vxge_poll_vp_reset, vdev, + HZ / 2); + + /* There is no need to check for RxD leak and RxD lookup on Titan1A */ + if (vdev->titan1 && vdev->vp_lockup_timer.function == NULL) + vxge_os_timer(&vdev->vp_lockup_timer, vxge_poll_vp_lockup, vdev, + HZ / 2); + + set_bit(__VXGE_STATE_CARD_UP, &vdev->state); + + smp_wmb(); + + if (vxge_hw_device_link_state_get(vdev->devh) == VXGE_HW_LINK_UP) { + netif_carrier_on(vdev->ndev); + netdev_notice(vdev->ndev, "Link Up\n"); + vdev->stats.link_up++; + } + + vxge_hw_device_intr_enable(vdev->devh); + + smp_wmb(); + + for (i = 0; i < vdev->no_of_vpath; i++) { + vpath = &vdev->vpaths[i]; + + vxge_hw_vpath_enable(vpath->handle); + smp_wmb(); + vxge_hw_vpath_rx_doorbell_init(vpath->handle); + } + + netif_tx_start_all_queues(vdev->ndev); + + /* configure CI */ + vxge_config_ci_for_tti_rti(vdev); + + goto out0; + +out2: + vxge_rem_isr(vdev); + + /* Disable napi */ + if (vdev->config.intr_type != MSI_X) + napi_disable(&vdev->napi); + else { + for (i = 0; i < vdev->no_of_vpath; i++) + napi_disable(&vdev->vpaths[i].ring.napi); + } + +out1: + vxge_close_vpaths(vdev, 0); +out0: + vxge_debug_entryexit(VXGE_TRACE, + "%s: %s:%d Exiting...", + dev->name, __func__, __LINE__); + return ret; +} + +/* Loop through the mac address list and delete all the entries */ +static void vxge_free_mac_add_list(struct vxge_vpath *vpath) +{ + + struct list_head *entry, *next; + if (list_empty(&vpath->mac_addr_list)) + return; + + list_for_each_safe(entry, next, &vpath->mac_addr_list) { + list_del(entry); + kfree((struct vxge_mac_addrs *)entry); + } +} + +static void vxge_napi_del_all(struct vxgedev *vdev) +{ + int i; + if (vdev->config.intr_type != MSI_X) + netif_napi_del(&vdev->napi); + else { + for (i = 0; i < vdev->no_of_vpath; i++) + netif_napi_del(&vdev->vpaths[i].ring.napi); + } +} + +static int do_vxge_close(struct net_device *dev, int do_io) +{ + enum vxge_hw_status status; + struct vxgedev *vdev; + struct __vxge_hw_device *hldev; + int i; + u64 val64, vpath_vector; + vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d", + dev->name, __func__, __LINE__); + + vdev = netdev_priv(dev); + hldev = pci_get_drvdata(vdev->pdev); + + if (unlikely(!is_vxge_card_up(vdev))) + return 0; + + /* If vxge_handle_crit_err task is executing, + * wait till it completes. */ + while (test_and_set_bit(__VXGE_STATE_RESET_CARD, &vdev->state)) + msleep(50); + + if (do_io) { + /* Put the vpath back in normal mode */ + vpath_vector = vxge_mBIT(vdev->vpaths[0].device_id); + status = vxge_hw_mgmt_reg_read(vdev->devh, + vxge_hw_mgmt_reg_type_mrpcim, + 0, + (ulong)offsetof( + struct vxge_hw_mrpcim_reg, + rts_mgr_cbasin_cfg), + &val64); + if (status == VXGE_HW_OK) { + val64 &= ~vpath_vector; + status = vxge_hw_mgmt_reg_write(vdev->devh, + vxge_hw_mgmt_reg_type_mrpcim, + 0, + (ulong)offsetof( + struct vxge_hw_mrpcim_reg, + rts_mgr_cbasin_cfg), + val64); + } + + /* Remove the function 0 from promiscuous mode */ + vxge_hw_mgmt_reg_write(vdev->devh, + vxge_hw_mgmt_reg_type_mrpcim, + 0, + (ulong)offsetof(struct vxge_hw_mrpcim_reg, + rxmac_authorize_all_addr), + 0); + + vxge_hw_mgmt_reg_write(vdev->devh, + vxge_hw_mgmt_reg_type_mrpcim, + 0, + (ulong)offsetof(struct vxge_hw_mrpcim_reg, + rxmac_authorize_all_vid), + 0); + + smp_wmb(); + } + + if (vdev->titan1) + del_timer_sync(&vdev->vp_lockup_timer); + + del_timer_sync(&vdev->vp_reset_timer); + + if (do_io) + vxge_hw_device_wait_receive_idle(hldev); + + clear_bit(__VXGE_STATE_CARD_UP, &vdev->state); + + /* Disable napi */ + if (vdev->config.intr_type != MSI_X) + napi_disable(&vdev->napi); + else { + for (i = 0; i < vdev->no_of_vpath; i++) + napi_disable(&vdev->vpaths[i].ring.napi); + } + + netif_carrier_off(vdev->ndev); + netdev_notice(vdev->ndev, "Link Down\n"); + netif_tx_stop_all_queues(vdev->ndev); + + /* Note that at this point xmit() is stopped by upper layer */ + if (do_io) + vxge_hw_device_intr_disable(vdev->devh); + + vxge_rem_isr(vdev); + + vxge_napi_del_all(vdev); + + if (do_io) + vxge_reset_all_vpaths(vdev); + + vxge_close_vpaths(vdev, 0); + + vxge_debug_entryexit(VXGE_TRACE, + "%s: %s:%d Exiting...", dev->name, __func__, __LINE__); + + clear_bit(__VXGE_STATE_RESET_CARD, &vdev->state); + + return 0; +} + +/** + * vxge_close + * @dev: device pointer. + * + * This is the stop entry point of the driver. It needs to undo exactly + * whatever was done by the open entry point, thus it's usually referred to + * as the close function.Among other things this function mainly stops the + * Rx side of the NIC and frees all the Rx buffers in the Rx rings. + * Return value: '0' on success and an appropriate (-)ve integer as + * defined in errno.h file on failure. + */ +static int vxge_close(struct net_device *dev) +{ + do_vxge_close(dev, 1); + return 0; +} + +/** + * vxge_change_mtu + * @dev: net device pointer. + * @new_mtu :the new MTU size for the device. + * + * A driver entry point to change MTU size for the device. Before changing + * the MTU the device must be stopped. + */ +static int vxge_change_mtu(struct net_device *dev, int new_mtu) +{ + struct vxgedev *vdev = netdev_priv(dev); + + vxge_debug_entryexit(vdev->level_trace, + "%s:%d", __func__, __LINE__); + if ((new_mtu < VXGE_HW_MIN_MTU) || (new_mtu > VXGE_HW_MAX_MTU)) { + vxge_debug_init(vdev->level_err, + "%s: mtu size is invalid", dev->name); + return -EPERM; + } + + /* check if device is down already */ + if (unlikely(!is_vxge_card_up(vdev))) { + /* just store new value, will use later on open() */ + dev->mtu = new_mtu; + vxge_debug_init(vdev->level_err, + "%s", "device is down on MTU change"); + return 0; + } + + vxge_debug_init(vdev->level_trace, + "trying to apply new MTU %d", new_mtu); + + if (vxge_close(dev)) + return -EIO; + + dev->mtu = new_mtu; + vdev->mtu = new_mtu; + + if (vxge_open(dev)) + return -EIO; + + vxge_debug_init(vdev->level_trace, + "%s: MTU changed to %d", vdev->ndev->name, new_mtu); + + vxge_debug_entryexit(vdev->level_trace, + "%s:%d Exiting...", __func__, __LINE__); + + return 0; +} + +/** + * vxge_get_stats64 + * @dev: pointer to the device structure + * @stats: pointer to struct rtnl_link_stats64 + * + */ +static struct rtnl_link_stats64 * +vxge_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *net_stats) +{ + struct vxgedev *vdev = netdev_priv(dev); + int k; + + /* net_stats already zeroed by caller */ + for (k = 0; k < vdev->no_of_vpath; k++) { + struct vxge_ring_stats *rxstats = &vdev->vpaths[k].ring.stats; + struct vxge_fifo_stats *txstats = &vdev->vpaths[k].fifo.stats; + unsigned int start; + u64 packets, bytes, multicast; + + do { + start = u64_stats_fetch_begin_irq(&rxstats->syncp); + + packets = rxstats->rx_frms; + multicast = rxstats->rx_mcast; + bytes = rxstats->rx_bytes; + } while (u64_stats_fetch_retry_irq(&rxstats->syncp, start)); + + net_stats->rx_packets += packets; + net_stats->rx_bytes += bytes; + net_stats->multicast += multicast; + + net_stats->rx_errors += rxstats->rx_errors; + net_stats->rx_dropped += rxstats->rx_dropped; + + do { + start = u64_stats_fetch_begin_irq(&txstats->syncp); + + packets = txstats->tx_frms; + bytes = txstats->tx_bytes; + } while (u64_stats_fetch_retry_irq(&txstats->syncp, start)); + + net_stats->tx_packets += packets; + net_stats->tx_bytes += bytes; + net_stats->tx_errors += txstats->tx_errors; + } + + return net_stats; +} + +static enum vxge_hw_status vxge_timestamp_config(struct __vxge_hw_device *devh) +{ + enum vxge_hw_status status; + u64 val64; + + /* Timestamp is passed to the driver via the FCS, therefore we + * must disable the FCS stripping by the adapter. Since this is + * required for the driver to load (due to a hardware bug), + * there is no need to do anything special here. + */ + val64 = VXGE_HW_XMAC_TIMESTAMP_EN | + VXGE_HW_XMAC_TIMESTAMP_USE_LINK_ID(0) | + VXGE_HW_XMAC_TIMESTAMP_INTERVAL(0); + + status = vxge_hw_mgmt_reg_write(devh, + vxge_hw_mgmt_reg_type_mrpcim, + 0, + offsetof(struct vxge_hw_mrpcim_reg, + xmac_timestamp), + val64); + vxge_hw_device_flush_io(devh); + devh->config.hwts_en = VXGE_HW_HWTS_ENABLE; + return status; +} + +static int vxge_hwtstamp_set(struct vxgedev *vdev, void __user *data) +{ + struct hwtstamp_config config; + int i; + + if (copy_from_user(&config, data, sizeof(config))) + return -EFAULT; + + /* reserved for future extensions */ + if (config.flags) + return -EINVAL; + + /* Transmit HW Timestamp not supported */ + switch (config.tx_type) { + case HWTSTAMP_TX_OFF: + break; + case HWTSTAMP_TX_ON: + default: + return -ERANGE; + } + + switch (config.rx_filter) { + case HWTSTAMP_FILTER_NONE: + vdev->rx_hwts = 0; + config.rx_filter = HWTSTAMP_FILTER_NONE; + break; + + case HWTSTAMP_FILTER_ALL: + case HWTSTAMP_FILTER_SOME: + case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: + case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: + case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: + case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: + case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: + case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: + case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: + case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: + case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: + case HWTSTAMP_FILTER_PTP_V2_EVENT: + case HWTSTAMP_FILTER_PTP_V2_SYNC: + case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: + if (vdev->devh->config.hwts_en != VXGE_HW_HWTS_ENABLE) + return -EFAULT; + + vdev->rx_hwts = 1; + config.rx_filter = HWTSTAMP_FILTER_ALL; + break; + + default: + return -ERANGE; + } + + for (i = 0; i < vdev->no_of_vpath; i++) + vdev->vpaths[i].ring.rx_hwts = vdev->rx_hwts; + + if (copy_to_user(data, &config, sizeof(config))) + return -EFAULT; + + return 0; +} + +static int vxge_hwtstamp_get(struct vxgedev *vdev, void __user *data) +{ + struct hwtstamp_config config; + + config.flags = 0; + config.tx_type = HWTSTAMP_TX_OFF; + config.rx_filter = (vdev->rx_hwts ? + HWTSTAMP_FILTER_ALL : HWTSTAMP_FILTER_NONE); + + if (copy_to_user(data, &config, sizeof(config))) + return -EFAULT; + + return 0; +} + +/** + * vxge_ioctl + * @dev: Device pointer. + * @ifr: An IOCTL specific structure, that can contain a pointer to + * a proprietary structure used to pass information to the driver. + * @cmd: This is used to distinguish between the different commands that + * can be passed to the IOCTL functions. + * + * Entry point for the Ioctl. + */ +static int vxge_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +{ + struct vxgedev *vdev = netdev_priv(dev); + + switch (cmd) { + case SIOCSHWTSTAMP: + return vxge_hwtstamp_set(vdev, rq->ifr_data); + case SIOCGHWTSTAMP: + return vxge_hwtstamp_get(vdev, rq->ifr_data); + default: + return -EOPNOTSUPP; + } +} + +/** + * vxge_tx_watchdog + * @dev: pointer to net device structure + * + * Watchdog for transmit side. + * This function is triggered if the Tx Queue is stopped + * for a pre-defined amount of time when the Interface is still up. + */ +static void vxge_tx_watchdog(struct net_device *dev) +{ + struct vxgedev *vdev; + + vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__); + + vdev = netdev_priv(dev); + + vdev->cric_err_event = VXGE_HW_EVENT_RESET_START; + + schedule_work(&vdev->reset_task); + vxge_debug_entryexit(VXGE_TRACE, + "%s:%d Exiting...", __func__, __LINE__); +} + +/** + * vxge_vlan_rx_add_vid + * @dev: net device pointer. + * @proto: vlan protocol + * @vid: vid + * + * Add the vlan id to the devices vlan id table + */ +static int +vxge_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) +{ + struct vxgedev *vdev = netdev_priv(dev); + struct vxge_vpath *vpath; + int vp_id; + + /* Add these vlan to the vid table */ + for (vp_id = 0; vp_id < vdev->no_of_vpath; vp_id++) { + vpath = &vdev->vpaths[vp_id]; + if (!vpath->is_open) + continue; + vxge_hw_vpath_vid_add(vpath->handle, vid); + } + set_bit(vid, vdev->active_vlans); + return 0; +} + +/** + * vxge_vlan_rx_kill_vid + * @dev: net device pointer. + * @proto: vlan protocol + * @vid: vid + * + * Remove the vlan id from the device's vlan id table + */ +static int +vxge_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) +{ + struct vxgedev *vdev = netdev_priv(dev); + struct vxge_vpath *vpath; + int vp_id; + + vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__); + + /* Delete this vlan from the vid table */ + for (vp_id = 0; vp_id < vdev->no_of_vpath; vp_id++) { + vpath = &vdev->vpaths[vp_id]; + if (!vpath->is_open) + continue; + vxge_hw_vpath_vid_delete(vpath->handle, vid); + } + vxge_debug_entryexit(VXGE_TRACE, + "%s:%d Exiting...", __func__, __LINE__); + clear_bit(vid, vdev->active_vlans); + return 0; +} + +static const struct net_device_ops vxge_netdev_ops = { + .ndo_open = vxge_open, + .ndo_stop = vxge_close, + .ndo_get_stats64 = vxge_get_stats64, + .ndo_start_xmit = vxge_xmit, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_rx_mode = vxge_set_multicast, + .ndo_do_ioctl = vxge_ioctl, + .ndo_set_mac_address = vxge_set_mac_addr, + .ndo_change_mtu = vxge_change_mtu, + .ndo_fix_features = vxge_fix_features, + .ndo_set_features = vxge_set_features, + .ndo_vlan_rx_kill_vid = vxge_vlan_rx_kill_vid, + .ndo_vlan_rx_add_vid = vxge_vlan_rx_add_vid, + .ndo_tx_timeout = vxge_tx_watchdog, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = vxge_netpoll, +#endif +}; + +static int vxge_device_register(struct __vxge_hw_device *hldev, + struct vxge_config *config, int high_dma, + int no_of_vpath, struct vxgedev **vdev_out) +{ + struct net_device *ndev; + enum vxge_hw_status status = VXGE_HW_OK; + struct vxgedev *vdev; + int ret = 0, no_of_queue = 1; + u64 stat; + + *vdev_out = NULL; + if (config->tx_steering_type) + no_of_queue = no_of_vpath; + + ndev = alloc_etherdev_mq(sizeof(struct vxgedev), + no_of_queue); + if (ndev == NULL) { + vxge_debug_init( + vxge_hw_device_trace_level_get(hldev), + "%s : device allocation failed", __func__); + ret = -ENODEV; + goto _out0; + } + + vxge_debug_entryexit( + vxge_hw_device_trace_level_get(hldev), + "%s: %s:%d Entering...", + ndev->name, __func__, __LINE__); + + vdev = netdev_priv(ndev); + memset(vdev, 0, sizeof(struct vxgedev)); + + vdev->ndev = ndev; + vdev->devh = hldev; + vdev->pdev = hldev->pdev; + memcpy(&vdev->config, config, sizeof(struct vxge_config)); + vdev->rx_hwts = 0; + vdev->titan1 = (vdev->pdev->revision == VXGE_HW_TITAN1_PCI_REVISION); + + SET_NETDEV_DEV(ndev, &vdev->pdev->dev); + + ndev->hw_features = NETIF_F_RXCSUM | NETIF_F_SG | + NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | + NETIF_F_TSO | NETIF_F_TSO6 | + NETIF_F_HW_VLAN_CTAG_TX; + if (vdev->config.rth_steering != NO_STEERING) + ndev->hw_features |= NETIF_F_RXHASH; + + ndev->features |= ndev->hw_features | + NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_FILTER; + + + ndev->netdev_ops = &vxge_netdev_ops; + + ndev->watchdog_timeo = VXGE_LL_WATCH_DOG_TIMEOUT; + INIT_WORK(&vdev->reset_task, vxge_reset); + + vxge_initialize_ethtool_ops(ndev); + + /* Allocate memory for vpath */ + vdev->vpaths = kzalloc((sizeof(struct vxge_vpath)) * + no_of_vpath, GFP_KERNEL); + if (!vdev->vpaths) { + vxge_debug_init(VXGE_ERR, + "%s: vpath memory allocation failed", + vdev->ndev->name); + ret = -ENOMEM; + goto _out1; + } + + vxge_debug_init(vxge_hw_device_trace_level_get(hldev), + "%s : checksumming enabled", __func__); + + if (high_dma) { + ndev->features |= NETIF_F_HIGHDMA; + vxge_debug_init(vxge_hw_device_trace_level_get(hldev), + "%s : using High DMA", __func__); + } + + ret = register_netdev(ndev); + if (ret) { + vxge_debug_init(vxge_hw_device_trace_level_get(hldev), + "%s: %s : device registration failed!", + ndev->name, __func__); + goto _out2; + } + + /* Set the factory defined MAC address initially */ + ndev->addr_len = ETH_ALEN; + + /* Make Link state as off at this point, when the Link change + * interrupt comes the state will be automatically changed to + * the right state. + */ + netif_carrier_off(ndev); + + vxge_debug_init(vxge_hw_device_trace_level_get(hldev), + "%s: Ethernet device registered", + ndev->name); + + hldev->ndev = ndev; + *vdev_out = vdev; + + /* Resetting the Device stats */ + status = vxge_hw_mrpcim_stats_access( + hldev, + VXGE_HW_STATS_OP_CLEAR_ALL_STATS, + 0, + 0, + &stat); + + if (status == VXGE_HW_ERR_PRIVILAGED_OPEARATION) + vxge_debug_init( + vxge_hw_device_trace_level_get(hldev), + "%s: device stats clear returns" + "VXGE_HW_ERR_PRIVILAGED_OPEARATION", ndev->name); + + vxge_debug_entryexit(vxge_hw_device_trace_level_get(hldev), + "%s: %s:%d Exiting...", + ndev->name, __func__, __LINE__); + + return ret; +_out2: + kfree(vdev->vpaths); +_out1: + free_netdev(ndev); +_out0: + return ret; +} + +/* + * vxge_device_unregister + * + * This function will unregister and free network device + */ +static void vxge_device_unregister(struct __vxge_hw_device *hldev) +{ + struct vxgedev *vdev; + struct net_device *dev; + char buf[IFNAMSIZ]; + + dev = hldev->ndev; + vdev = netdev_priv(dev); + + vxge_debug_entryexit(vdev->level_trace, "%s: %s:%d", vdev->ndev->name, + __func__, __LINE__); + + strlcpy(buf, dev->name, IFNAMSIZ); + + flush_work(&vdev->reset_task); + + /* in 2.6 will call stop() if device is up */ + unregister_netdev(dev); + + kfree(vdev->vpaths); + + /* we are safe to free it now */ + free_netdev(dev); + + vxge_debug_init(vdev->level_trace, "%s: ethernet device unregistered", + buf); + vxge_debug_entryexit(vdev->level_trace, "%s: %s:%d Exiting...", buf, + __func__, __LINE__); +} + +/* + * vxge_callback_crit_err + * + * This function is called by the alarm handler in interrupt context. + * Driver must analyze it based on the event type. + */ +static void +vxge_callback_crit_err(struct __vxge_hw_device *hldev, + enum vxge_hw_event type, u64 vp_id) +{ + struct net_device *dev = hldev->ndev; + struct vxgedev *vdev = netdev_priv(dev); + struct vxge_vpath *vpath = NULL; + int vpath_idx; + + vxge_debug_entryexit(vdev->level_trace, + "%s: %s:%d", vdev->ndev->name, __func__, __LINE__); + + /* Note: This event type should be used for device wide + * indications only - Serious errors, Slot freeze and critical errors + */ + vdev->cric_err_event = type; + + for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath; vpath_idx++) { + vpath = &vdev->vpaths[vpath_idx]; + if (vpath->device_id == vp_id) + break; + } + + if (!test_bit(__VXGE_STATE_RESET_CARD, &vdev->state)) { + if (type == VXGE_HW_EVENT_SLOT_FREEZE) { + vxge_debug_init(VXGE_ERR, + "%s: Slot is frozen", vdev->ndev->name); + } else if (type == VXGE_HW_EVENT_SERR) { + vxge_debug_init(VXGE_ERR, + "%s: Encountered Serious Error", + vdev->ndev->name); + } else if (type == VXGE_HW_EVENT_CRITICAL_ERR) + vxge_debug_init(VXGE_ERR, + "%s: Encountered Critical Error", + vdev->ndev->name); + } + + if ((type == VXGE_HW_EVENT_SERR) || + (type == VXGE_HW_EVENT_SLOT_FREEZE)) { + if (unlikely(vdev->exec_mode)) + clear_bit(__VXGE_STATE_CARD_UP, &vdev->state); + } else if (type == VXGE_HW_EVENT_CRITICAL_ERR) { + vxge_hw_device_mask_all(hldev); + if (unlikely(vdev->exec_mode)) + clear_bit(__VXGE_STATE_CARD_UP, &vdev->state); + } else if ((type == VXGE_HW_EVENT_FIFO_ERR) || + (type == VXGE_HW_EVENT_VPATH_ERR)) { + + if (unlikely(vdev->exec_mode)) + clear_bit(__VXGE_STATE_CARD_UP, &vdev->state); + else { + /* check if this vpath is already set for reset */ + if (!test_and_set_bit(vpath_idx, &vdev->vp_reset)) { + + /* disable interrupts for this vpath */ + vxge_vpath_intr_disable(vdev, vpath_idx); + + /* stop the queue for this vpath */ + netif_tx_stop_queue(vpath->fifo.txq); + } + } + } + + vxge_debug_entryexit(vdev->level_trace, + "%s: %s:%d Exiting...", + vdev->ndev->name, __func__, __LINE__); +} + +static void verify_bandwidth(void) +{ + int i, band_width, total = 0, equal_priority = 0; + + /* 1. If user enters 0 for some fifo, give equal priority to all */ + for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) { + if (bw_percentage[i] == 0) { + equal_priority = 1; + break; + } + } + + if (!equal_priority) { + /* 2. If sum exceeds 100, give equal priority to all */ + for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) { + if (bw_percentage[i] == 0xFF) + break; + + total += bw_percentage[i]; + if (total > VXGE_HW_VPATH_BANDWIDTH_MAX) { + equal_priority = 1; + break; + } + } + } + + if (!equal_priority) { + /* Is all the bandwidth consumed? */ + if (total < VXGE_HW_VPATH_BANDWIDTH_MAX) { + if (i < VXGE_HW_MAX_VIRTUAL_PATHS) { + /* Split rest of bw equally among next VPs*/ + band_width = + (VXGE_HW_VPATH_BANDWIDTH_MAX - total) / + (VXGE_HW_MAX_VIRTUAL_PATHS - i); + if (band_width < 2) /* min of 2% */ + equal_priority = 1; + else { + for (; i < VXGE_HW_MAX_VIRTUAL_PATHS; + i++) + bw_percentage[i] = + band_width; + } + } + } else if (i < VXGE_HW_MAX_VIRTUAL_PATHS) + equal_priority = 1; + } + + if (equal_priority) { + vxge_debug_init(VXGE_ERR, + "%s: Assigning equal bandwidth to all the vpaths", + VXGE_DRIVER_NAME); + bw_percentage[0] = VXGE_HW_VPATH_BANDWIDTH_MAX / + VXGE_HW_MAX_VIRTUAL_PATHS; + for (i = 1; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) + bw_percentage[i] = bw_percentage[0]; + } +} + +/* + * Vpath configuration + */ +static int vxge_config_vpaths(struct vxge_hw_device_config *device_config, + u64 vpath_mask, struct vxge_config *config_param) +{ + int i, no_of_vpaths = 0, default_no_vpath = 0, temp; + u32 txdl_size, txdl_per_memblock; + + temp = driver_config->vpath_per_dev; + if ((driver_config->vpath_per_dev == VXGE_USE_DEFAULT) && + (max_config_dev == VXGE_MAX_CONFIG_DEV)) { + /* No more CPU. Return vpath number as zero.*/ + if (driver_config->g_no_cpus == -1) + return 0; + + if (!driver_config->g_no_cpus) + driver_config->g_no_cpus = + netif_get_num_default_rss_queues(); + + driver_config->vpath_per_dev = driver_config->g_no_cpus >> 1; + if (!driver_config->vpath_per_dev) + driver_config->vpath_per_dev = 1; + + for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) + if (!vxge_bVALn(vpath_mask, i, 1)) + continue; + else + default_no_vpath++; + if (default_no_vpath < driver_config->vpath_per_dev) + driver_config->vpath_per_dev = default_no_vpath; + + driver_config->g_no_cpus = driver_config->g_no_cpus - + (driver_config->vpath_per_dev * 2); + if (driver_config->g_no_cpus <= 0) + driver_config->g_no_cpus = -1; + } + + if (driver_config->vpath_per_dev == 1) { + vxge_debug_ll_config(VXGE_TRACE, + "%s: Disable tx and rx steering, " + "as single vpath is configured", VXGE_DRIVER_NAME); + config_param->rth_steering = NO_STEERING; + config_param->tx_steering_type = NO_STEERING; + device_config->rth_en = 0; + } + + /* configure bandwidth */ + for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) + device_config->vp_config[i].min_bandwidth = bw_percentage[i]; + + for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) { + device_config->vp_config[i].vp_id = i; + device_config->vp_config[i].mtu = VXGE_HW_DEFAULT_MTU; + if (no_of_vpaths < driver_config->vpath_per_dev) { + if (!vxge_bVALn(vpath_mask, i, 1)) { + vxge_debug_ll_config(VXGE_TRACE, + "%s: vpath: %d is not available", + VXGE_DRIVER_NAME, i); + continue; + } else { + vxge_debug_ll_config(VXGE_TRACE, + "%s: vpath: %d available", + VXGE_DRIVER_NAME, i); + no_of_vpaths++; + } + } else { + vxge_debug_ll_config(VXGE_TRACE, + "%s: vpath: %d is not configured, " + "max_config_vpath exceeded", + VXGE_DRIVER_NAME, i); + break; + } + + /* Configure Tx fifo's */ + device_config->vp_config[i].fifo.enable = + VXGE_HW_FIFO_ENABLE; + device_config->vp_config[i].fifo.max_frags = + MAX_SKB_FRAGS + 1; + device_config->vp_config[i].fifo.memblock_size = + VXGE_HW_MIN_FIFO_MEMBLOCK_SIZE; + + txdl_size = device_config->vp_config[i].fifo.max_frags * + sizeof(struct vxge_hw_fifo_txd); + txdl_per_memblock = VXGE_HW_MIN_FIFO_MEMBLOCK_SIZE / txdl_size; + + device_config->vp_config[i].fifo.fifo_blocks = + ((VXGE_DEF_FIFO_LENGTH - 1) / txdl_per_memblock) + 1; + + device_config->vp_config[i].fifo.intr = + VXGE_HW_FIFO_QUEUE_INTR_DISABLE; + + /* Configure tti properties */ + device_config->vp_config[i].tti.intr_enable = + VXGE_HW_TIM_INTR_ENABLE; + + device_config->vp_config[i].tti.btimer_val = + (VXGE_TTI_BTIMER_VAL * 1000) / 272; + + device_config->vp_config[i].tti.timer_ac_en = + VXGE_HW_TIM_TIMER_AC_ENABLE; + + /* For msi-x with napi (each vector has a handler of its own) - + * Set CI to OFF for all vpaths + */ + device_config->vp_config[i].tti.timer_ci_en = + VXGE_HW_TIM_TIMER_CI_DISABLE; + + device_config->vp_config[i].tti.timer_ri_en = + VXGE_HW_TIM_TIMER_RI_DISABLE; + + device_config->vp_config[i].tti.util_sel = + VXGE_HW_TIM_UTIL_SEL_LEGACY_TX_NET_UTIL; + + device_config->vp_config[i].tti.ltimer_val = + (VXGE_TTI_LTIMER_VAL * 1000) / 272; + + device_config->vp_config[i].tti.rtimer_val = + (VXGE_TTI_RTIMER_VAL * 1000) / 272; + + device_config->vp_config[i].tti.urange_a = TTI_TX_URANGE_A; + device_config->vp_config[i].tti.urange_b = TTI_TX_URANGE_B; + device_config->vp_config[i].tti.urange_c = TTI_TX_URANGE_C; + device_config->vp_config[i].tti.uec_a = TTI_TX_UFC_A; + device_config->vp_config[i].tti.uec_b = TTI_TX_UFC_B; + device_config->vp_config[i].tti.uec_c = TTI_TX_UFC_C; + device_config->vp_config[i].tti.uec_d = TTI_TX_UFC_D; + + /* Configure Rx rings */ + device_config->vp_config[i].ring.enable = + VXGE_HW_RING_ENABLE; + + device_config->vp_config[i].ring.ring_blocks = + VXGE_HW_DEF_RING_BLOCKS; + + device_config->vp_config[i].ring.buffer_mode = + VXGE_HW_RING_RXD_BUFFER_MODE_1; + + device_config->vp_config[i].ring.rxds_limit = + VXGE_HW_DEF_RING_RXDS_LIMIT; + + device_config->vp_config[i].ring.scatter_mode = + VXGE_HW_RING_SCATTER_MODE_A; + + /* Configure rti properties */ + device_config->vp_config[i].rti.intr_enable = + VXGE_HW_TIM_INTR_ENABLE; + + device_config->vp_config[i].rti.btimer_val = + (VXGE_RTI_BTIMER_VAL * 1000)/272; + + device_config->vp_config[i].rti.timer_ac_en = + VXGE_HW_TIM_TIMER_AC_ENABLE; + + device_config->vp_config[i].rti.timer_ci_en = + VXGE_HW_TIM_TIMER_CI_DISABLE; + + device_config->vp_config[i].rti.timer_ri_en = + VXGE_HW_TIM_TIMER_RI_DISABLE; + + device_config->vp_config[i].rti.util_sel = + VXGE_HW_TIM_UTIL_SEL_LEGACY_RX_NET_UTIL; + + device_config->vp_config[i].rti.urange_a = + RTI_RX_URANGE_A; + device_config->vp_config[i].rti.urange_b = + RTI_RX_URANGE_B; + device_config->vp_config[i].rti.urange_c = + RTI_RX_URANGE_C; + device_config->vp_config[i].rti.uec_a = RTI_RX_UFC_A; + device_config->vp_config[i].rti.uec_b = RTI_RX_UFC_B; + device_config->vp_config[i].rti.uec_c = RTI_RX_UFC_C; + device_config->vp_config[i].rti.uec_d = RTI_RX_UFC_D; + + device_config->vp_config[i].rti.rtimer_val = + (VXGE_RTI_RTIMER_VAL * 1000) / 272; + + device_config->vp_config[i].rti.ltimer_val = + (VXGE_RTI_LTIMER_VAL * 1000) / 272; + + device_config->vp_config[i].rpa_strip_vlan_tag = + vlan_tag_strip; + } + + driver_config->vpath_per_dev = temp; + return no_of_vpaths; +} + +/* initialize device configuratrions */ +static void vxge_device_config_init(struct vxge_hw_device_config *device_config, + int *intr_type) +{ + /* Used for CQRQ/SRQ. */ + device_config->dma_blockpool_initial = + VXGE_HW_INITIAL_DMA_BLOCK_POOL_SIZE; + + device_config->dma_blockpool_max = + VXGE_HW_MAX_DMA_BLOCK_POOL_SIZE; + + if (max_mac_vpath > VXGE_MAX_MAC_ADDR_COUNT) + max_mac_vpath = VXGE_MAX_MAC_ADDR_COUNT; + +#ifndef CONFIG_PCI_MSI + vxge_debug_init(VXGE_ERR, + "%s: This Kernel does not support " + "MSI-X. Defaulting to INTA", VXGE_DRIVER_NAME); + *intr_type = INTA; +#endif + + /* Configure whether MSI-X or IRQL. */ + switch (*intr_type) { + case INTA: + device_config->intr_mode = VXGE_HW_INTR_MODE_IRQLINE; + break; + + case MSI_X: + device_config->intr_mode = VXGE_HW_INTR_MODE_MSIX_ONE_SHOT; + break; + } + + /* Timer period between device poll */ + device_config->device_poll_millis = VXGE_TIMER_DELAY; + + /* Configure mac based steering. */ + device_config->rts_mac_en = addr_learn_en; + + /* Configure Vpaths */ + device_config->rth_it_type = VXGE_HW_RTH_IT_TYPE_MULTI_IT; + + vxge_debug_ll_config(VXGE_TRACE, "%s : Device Config Params ", + __func__); + vxge_debug_ll_config(VXGE_TRACE, "intr_mode : %d", + device_config->intr_mode); + vxge_debug_ll_config(VXGE_TRACE, "device_poll_millis : %d", + device_config->device_poll_millis); + vxge_debug_ll_config(VXGE_TRACE, "rth_en : %d", + device_config->rth_en); + vxge_debug_ll_config(VXGE_TRACE, "rth_it_type : %d", + device_config->rth_it_type); +} + +static void vxge_print_parm(struct vxgedev *vdev, u64 vpath_mask) +{ + int i; + + vxge_debug_init(VXGE_TRACE, + "%s: %d Vpath(s) opened", + vdev->ndev->name, vdev->no_of_vpath); + + switch (vdev->config.intr_type) { + case INTA: + vxge_debug_init(VXGE_TRACE, + "%s: Interrupt type INTA", vdev->ndev->name); + break; + + case MSI_X: + vxge_debug_init(VXGE_TRACE, + "%s: Interrupt type MSI-X", vdev->ndev->name); + break; + } + + if (vdev->config.rth_steering) { + vxge_debug_init(VXGE_TRACE, + "%s: RTH steering enabled for TCP_IPV4", + vdev->ndev->name); + } else { + vxge_debug_init(VXGE_TRACE, + "%s: RTH steering disabled", vdev->ndev->name); + } + + switch (vdev->config.tx_steering_type) { + case NO_STEERING: + vxge_debug_init(VXGE_TRACE, + "%s: Tx steering disabled", vdev->ndev->name); + break; + case TX_PRIORITY_STEERING: + vxge_debug_init(VXGE_TRACE, + "%s: Unsupported tx steering option", + vdev->ndev->name); + vxge_debug_init(VXGE_TRACE, + "%s: Tx steering disabled", vdev->ndev->name); + vdev->config.tx_steering_type = 0; + break; + case TX_VLAN_STEERING: + vxge_debug_init(VXGE_TRACE, + "%s: Unsupported tx steering option", + vdev->ndev->name); + vxge_debug_init(VXGE_TRACE, + "%s: Tx steering disabled", vdev->ndev->name); + vdev->config.tx_steering_type = 0; + break; + case TX_MULTIQ_STEERING: + vxge_debug_init(VXGE_TRACE, + "%s: Tx multiqueue steering enabled", + vdev->ndev->name); + break; + case TX_PORT_STEERING: + vxge_debug_init(VXGE_TRACE, + "%s: Tx port steering enabled", + vdev->ndev->name); + break; + default: + vxge_debug_init(VXGE_ERR, + "%s: Unsupported tx steering type", + vdev->ndev->name); + vxge_debug_init(VXGE_TRACE, + "%s: Tx steering disabled", vdev->ndev->name); + vdev->config.tx_steering_type = 0; + } + + if (vdev->config.addr_learn_en) + vxge_debug_init(VXGE_TRACE, + "%s: MAC Address learning enabled", vdev->ndev->name); + + for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) { + if (!vxge_bVALn(vpath_mask, i, 1)) + continue; + vxge_debug_ll_config(VXGE_TRACE, + "%s: MTU size - %d", vdev->ndev->name, + ((vdev->devh))-> + config.vp_config[i].mtu); + vxge_debug_init(VXGE_TRACE, + "%s: VLAN tag stripping %s", vdev->ndev->name, + ((vdev->devh))-> + config.vp_config[i].rpa_strip_vlan_tag + ? "Enabled" : "Disabled"); + vxge_debug_ll_config(VXGE_TRACE, + "%s: Max frags : %d", vdev->ndev->name, + ((vdev->devh))-> + config.vp_config[i].fifo.max_frags); + break; + } +} + +#ifdef CONFIG_PM +/** + * vxge_pm_suspend - vxge power management suspend entry point + * + */ +static int vxge_pm_suspend(struct pci_dev *pdev, pm_message_t state) +{ + return -ENOSYS; +} +/** + * vxge_pm_resume - vxge power management resume entry point + * + */ +static int vxge_pm_resume(struct pci_dev *pdev) +{ + return -ENOSYS; +} + +#endif + +/** + * vxge_io_error_detected - called when PCI error is detected + * @pdev: Pointer to PCI device + * @state: The current pci connection state + * + * This function is called after a PCI bus error affecting + * this device has been detected. + */ +static pci_ers_result_t vxge_io_error_detected(struct pci_dev *pdev, + pci_channel_state_t state) +{ + struct __vxge_hw_device *hldev = pci_get_drvdata(pdev); + struct net_device *netdev = hldev->ndev; + + netif_device_detach(netdev); + + if (state == pci_channel_io_perm_failure) + return PCI_ERS_RESULT_DISCONNECT; + + if (netif_running(netdev)) { + /* Bring down the card, while avoiding PCI I/O */ + do_vxge_close(netdev, 0); + } + + pci_disable_device(pdev); + + return PCI_ERS_RESULT_NEED_RESET; +} + +/** + * vxge_io_slot_reset - called after the pci bus has been reset. + * @pdev: Pointer to PCI device + * + * Restart the card from scratch, as if from a cold-boot. + * At this point, the card has exprienced a hard reset, + * followed by fixups by BIOS, and has its config space + * set up identically to what it was at cold boot. + */ +static pci_ers_result_t vxge_io_slot_reset(struct pci_dev *pdev) +{ + struct __vxge_hw_device *hldev = pci_get_drvdata(pdev); + struct net_device *netdev = hldev->ndev; + + struct vxgedev *vdev = netdev_priv(netdev); + + if (pci_enable_device(pdev)) { + netdev_err(netdev, "Cannot re-enable device after reset\n"); + return PCI_ERS_RESULT_DISCONNECT; + } + + pci_set_master(pdev); + do_vxge_reset(vdev, VXGE_LL_FULL_RESET); + + return PCI_ERS_RESULT_RECOVERED; +} + +/** + * vxge_io_resume - called when traffic can start flowing again. + * @pdev: Pointer to PCI device + * + * This callback is called when the error recovery driver tells + * us that its OK to resume normal operation. + */ +static void vxge_io_resume(struct pci_dev *pdev) +{ + struct __vxge_hw_device *hldev = pci_get_drvdata(pdev); + struct net_device *netdev = hldev->ndev; + + if (netif_running(netdev)) { + if (vxge_open(netdev)) { + netdev_err(netdev, + "Can't bring device back up after reset\n"); + return; + } + } + + netif_device_attach(netdev); +} + +static inline u32 vxge_get_num_vfs(u64 function_mode) +{ + u32 num_functions = 0; + + switch (function_mode) { + case VXGE_HW_FUNCTION_MODE_MULTI_FUNCTION: + case VXGE_HW_FUNCTION_MODE_SRIOV_8: + num_functions = 8; + break; + case VXGE_HW_FUNCTION_MODE_SINGLE_FUNCTION: + num_functions = 1; + break; + case VXGE_HW_FUNCTION_MODE_SRIOV: + case VXGE_HW_FUNCTION_MODE_MRIOV: + case VXGE_HW_FUNCTION_MODE_MULTI_FUNCTION_17: + num_functions = 17; + break; + case VXGE_HW_FUNCTION_MODE_SRIOV_4: + num_functions = 4; + break; + case VXGE_HW_FUNCTION_MODE_MULTI_FUNCTION_2: + num_functions = 2; + break; + case VXGE_HW_FUNCTION_MODE_MRIOV_8: + num_functions = 8; /* TODO */ + break; + } + return num_functions; +} + +int vxge_fw_upgrade(struct vxgedev *vdev, char *fw_name, int override) +{ + struct __vxge_hw_device *hldev = vdev->devh; + u32 maj, min, bld, cmaj, cmin, cbld; + enum vxge_hw_status status; + const struct firmware *fw; + int ret; + + ret = request_firmware(&fw, fw_name, &vdev->pdev->dev); + if (ret) { + vxge_debug_init(VXGE_ERR, "%s: Firmware file '%s' not found", + VXGE_DRIVER_NAME, fw_name); + goto out; + } + + /* Load the new firmware onto the adapter */ + status = vxge_update_fw_image(hldev, fw->data, fw->size); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "%s: FW image download to adapter failed '%s'.", + VXGE_DRIVER_NAME, fw_name); + ret = -EIO; + goto out; + } + + /* Read the version of the new firmware */ + status = vxge_hw_upgrade_read_version(hldev, &maj, &min, &bld); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "%s: Upgrade read version failed '%s'.", + VXGE_DRIVER_NAME, fw_name); + ret = -EIO; + goto out; + } + + cmaj = vdev->config.device_hw_info.fw_version.major; + cmin = vdev->config.device_hw_info.fw_version.minor; + cbld = vdev->config.device_hw_info.fw_version.build; + /* It's possible the version in /lib/firmware is not the latest version. + * If so, we could get into a loop of trying to upgrade to the latest + * and flashing the older version. + */ + if (VXGE_FW_VER(maj, min, bld) == VXGE_FW_VER(cmaj, cmin, cbld) && + !override) { + ret = -EINVAL; + goto out; + } + + printk(KERN_NOTICE "Upgrade to firmware version %d.%d.%d commencing\n", + maj, min, bld); + + /* Flash the adapter with the new firmware */ + status = vxge_hw_flash_fw(hldev); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, "%s: Upgrade commit failed '%s'.", + VXGE_DRIVER_NAME, fw_name); + ret = -EIO; + goto out; + } + + printk(KERN_NOTICE "Upgrade of firmware successful! Adapter must be " + "hard reset before using, thus requiring a system reboot or a " + "hotplug event.\n"); + +out: + release_firmware(fw); + return ret; +} + +static int vxge_probe_fw_update(struct vxgedev *vdev) +{ + u32 maj, min, bld; + int ret, gpxe = 0; + char *fw_name; + + maj = vdev->config.device_hw_info.fw_version.major; + min = vdev->config.device_hw_info.fw_version.minor; + bld = vdev->config.device_hw_info.fw_version.build; + + if (VXGE_FW_VER(maj, min, bld) == VXGE_CERT_FW_VER) + return 0; + + /* Ignore the build number when determining if the current firmware is + * "too new" to load the driver + */ + if (VXGE_FW_VER(maj, min, 0) > VXGE_CERT_FW_VER) { + vxge_debug_init(VXGE_ERR, "%s: Firmware newer than last known " + "version, unable to load driver\n", + VXGE_DRIVER_NAME); + return -EINVAL; + } + + /* Firmware 1.4.4 and older cannot be upgraded, and is too ancient to + * work with this driver. + */ + if (VXGE_FW_VER(maj, min, bld) <= VXGE_FW_DEAD_VER) { + vxge_debug_init(VXGE_ERR, "%s: Firmware %d.%d.%d cannot be " + "upgraded\n", VXGE_DRIVER_NAME, maj, min, bld); + return -EINVAL; + } + + /* If file not specified, determine gPXE or not */ + if (VXGE_FW_VER(maj, min, bld) >= VXGE_EPROM_FW_VER) { + int i; + for (i = 0; i < VXGE_HW_MAX_ROM_IMAGES; i++) + if (vdev->devh->eprom_versions[i]) { + gpxe = 1; + break; + } + } + if (gpxe) + fw_name = "vxge/X3fw-pxe.ncf"; + else + fw_name = "vxge/X3fw.ncf"; + + ret = vxge_fw_upgrade(vdev, fw_name, 0); + /* -EINVAL and -ENOENT are not fatal errors for flashing firmware on + * probe, so ignore them + */ + if (ret != -EINVAL && ret != -ENOENT) + return -EIO; + else + ret = 0; + + if (VXGE_FW_VER(VXGE_CERT_FW_VER_MAJOR, VXGE_CERT_FW_VER_MINOR, 0) > + VXGE_FW_VER(maj, min, 0)) { + vxge_debug_init(VXGE_ERR, "%s: Firmware %d.%d.%d is too old to" + " be used with this driver.", + VXGE_DRIVER_NAME, maj, min, bld); + return -EINVAL; + } + + return ret; +} + +static int is_sriov_initialized(struct pci_dev *pdev) +{ + int pos; + u16 ctrl; + + pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV); + if (pos) { + pci_read_config_word(pdev, pos + PCI_SRIOV_CTRL, &ctrl); + if (ctrl & PCI_SRIOV_CTRL_VFE) + return 1; + } + return 0; +} + +static const struct vxge_hw_uld_cbs vxge_callbacks = { + .link_up = vxge_callback_link_up, + .link_down = vxge_callback_link_down, + .crit_err = vxge_callback_crit_err, +}; + +/** + * vxge_probe + * @pdev : structure containing the PCI related information of the device. + * @pre: List of PCI devices supported by the driver listed in vxge_id_table. + * Description: + * This function is called when a new PCI device gets detected and initializes + * it. + * Return value: + * returns 0 on success and negative on failure. + * + */ +static int +vxge_probe(struct pci_dev *pdev, const struct pci_device_id *pre) +{ + struct __vxge_hw_device *hldev; + enum vxge_hw_status status; + int ret; + int high_dma = 0; + u64 vpath_mask = 0; + struct vxgedev *vdev; + struct vxge_config *ll_config = NULL; + struct vxge_hw_device_config *device_config = NULL; + struct vxge_hw_device_attr attr; + int i, j, no_of_vpath = 0, max_vpath_supported = 0; + u8 *macaddr; + struct vxge_mac_addrs *entry; + static int bus = -1, device = -1; + u32 host_type; + u8 new_device = 0; + enum vxge_hw_status is_privileged; + u32 function_mode; + u32 num_vfs = 0; + + vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__); + attr.pdev = pdev; + + /* In SRIOV-17 mode, functions of the same adapter + * can be deployed on different buses + */ + if (((bus != pdev->bus->number) || (device != PCI_SLOT(pdev->devfn))) && + !pdev->is_virtfn) + new_device = 1; + + bus = pdev->bus->number; + device = PCI_SLOT(pdev->devfn); + + if (new_device) { + if (driver_config->config_dev_cnt && + (driver_config->config_dev_cnt != + driver_config->total_dev_cnt)) + vxge_debug_init(VXGE_ERR, + "%s: Configured %d of %d devices", + VXGE_DRIVER_NAME, + driver_config->config_dev_cnt, + driver_config->total_dev_cnt); + driver_config->config_dev_cnt = 0; + driver_config->total_dev_cnt = 0; + } + + /* Now making the CPU based no of vpath calculation + * applicable for individual functions as well. + */ + driver_config->g_no_cpus = 0; + driver_config->vpath_per_dev = max_config_vpath; + + driver_config->total_dev_cnt++; + if (++driver_config->config_dev_cnt > max_config_dev) { + ret = 0; + goto _exit0; + } + + device_config = kzalloc(sizeof(struct vxge_hw_device_config), + GFP_KERNEL); + if (!device_config) { + ret = -ENOMEM; + vxge_debug_init(VXGE_ERR, + "device_config : malloc failed %s %d", + __FILE__, __LINE__); + goto _exit0; + } + + ll_config = kzalloc(sizeof(struct vxge_config), GFP_KERNEL); + if (!ll_config) { + ret = -ENOMEM; + vxge_debug_init(VXGE_ERR, + "device_config : malloc failed %s %d", + __FILE__, __LINE__); + goto _exit0; + } + ll_config->tx_steering_type = TX_MULTIQ_STEERING; + ll_config->intr_type = MSI_X; + ll_config->napi_weight = NEW_NAPI_WEIGHT; + ll_config->rth_steering = RTH_STEERING; + + /* get the default configuration parameters */ + vxge_hw_device_config_default_get(device_config); + + /* initialize configuration parameters */ + vxge_device_config_init(device_config, &ll_config->intr_type); + + ret = pci_enable_device(pdev); + if (ret) { + vxge_debug_init(VXGE_ERR, + "%s : can not enable PCI device", __func__); + goto _exit0; + } + + if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { + vxge_debug_ll_config(VXGE_TRACE, + "%s : using 64bit DMA", __func__); + + high_dma = 1; + + if (pci_set_consistent_dma_mask(pdev, + DMA_BIT_MASK(64))) { + vxge_debug_init(VXGE_ERR, + "%s : unable to obtain 64bit DMA for " + "consistent allocations", __func__); + ret = -ENOMEM; + goto _exit1; + } + } else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) { + vxge_debug_ll_config(VXGE_TRACE, + "%s : using 32bit DMA", __func__); + } else { + ret = -ENOMEM; + goto _exit1; + } + + ret = pci_request_region(pdev, 0, VXGE_DRIVER_NAME); + if (ret) { + vxge_debug_init(VXGE_ERR, + "%s : request regions failed", __func__); + goto _exit1; + } + + pci_set_master(pdev); + + attr.bar0 = pci_ioremap_bar(pdev, 0); + if (!attr.bar0) { + vxge_debug_init(VXGE_ERR, + "%s : cannot remap io memory bar0", __func__); + ret = -ENODEV; + goto _exit2; + } + vxge_debug_ll_config(VXGE_TRACE, + "pci ioremap bar0: %p:0x%llx", + attr.bar0, + (unsigned long long)pci_resource_start(pdev, 0)); + + status = vxge_hw_device_hw_info_get(attr.bar0, + &ll_config->device_hw_info); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "%s: Reading of hardware info failed." + "Please try upgrading the firmware.", VXGE_DRIVER_NAME); + ret = -EINVAL; + goto _exit3; + } + + vpath_mask = ll_config->device_hw_info.vpath_mask; + if (vpath_mask == 0) { + vxge_debug_ll_config(VXGE_TRACE, + "%s: No vpaths available in device", VXGE_DRIVER_NAME); + ret = -EINVAL; + goto _exit3; + } + + vxge_debug_ll_config(VXGE_TRACE, + "%s:%d Vpath mask = %llx", __func__, __LINE__, + (unsigned long long)vpath_mask); + + function_mode = ll_config->device_hw_info.function_mode; + host_type = ll_config->device_hw_info.host_type; + is_privileged = __vxge_hw_device_is_privilaged(host_type, + ll_config->device_hw_info.func_id); + + /* Check how many vpaths are available */ + for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) { + if (!((vpath_mask) & vxge_mBIT(i))) + continue; + max_vpath_supported++; + } + + if (new_device) + num_vfs = vxge_get_num_vfs(function_mode) - 1; + + /* Enable SRIOV mode, if firmware has SRIOV support and if it is a PF */ + if (is_sriov(function_mode) && !is_sriov_initialized(pdev) && + (ll_config->intr_type != INTA)) { + ret = pci_enable_sriov(pdev, num_vfs); + if (ret) + vxge_debug_ll_config(VXGE_ERR, + "Failed in enabling SRIOV mode: %d\n", ret); + /* No need to fail out, as an error here is non-fatal */ + } + + /* + * Configure vpaths and get driver configured number of vpaths + * which is less than or equal to the maximum vpaths per function. + */ + no_of_vpath = vxge_config_vpaths(device_config, vpath_mask, ll_config); + if (!no_of_vpath) { + vxge_debug_ll_config(VXGE_ERR, + "%s: No more vpaths to configure", VXGE_DRIVER_NAME); + ret = 0; + goto _exit3; + } + + /* Setting driver callbacks */ + attr.uld_callbacks = &vxge_callbacks; + + status = vxge_hw_device_initialize(&hldev, &attr, device_config); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, + "Failed to initialize device (%d)", status); + ret = -EINVAL; + goto _exit3; + } + + if (VXGE_FW_VER(ll_config->device_hw_info.fw_version.major, + ll_config->device_hw_info.fw_version.minor, + ll_config->device_hw_info.fw_version.build) >= + VXGE_EPROM_FW_VER) { + struct eprom_image img[VXGE_HW_MAX_ROM_IMAGES]; + + status = vxge_hw_vpath_eprom_img_ver_get(hldev, img); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, "%s: Reading of EPROM failed", + VXGE_DRIVER_NAME); + /* This is a non-fatal error, continue */ + } + + for (i = 0; i < VXGE_HW_MAX_ROM_IMAGES; i++) { + hldev->eprom_versions[i] = img[i].version; + if (!img[i].is_valid) + break; + vxge_debug_init(VXGE_TRACE, "%s: EPROM %d, version " + "%d.%d.%d.%d", VXGE_DRIVER_NAME, i, + VXGE_EPROM_IMG_MAJOR(img[i].version), + VXGE_EPROM_IMG_MINOR(img[i].version), + VXGE_EPROM_IMG_FIX(img[i].version), + VXGE_EPROM_IMG_BUILD(img[i].version)); + } + } + + /* if FCS stripping is not disabled in MAC fail driver load */ + status = vxge_hw_vpath_strip_fcs_check(hldev, vpath_mask); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, "%s: FCS stripping is enabled in MAC" + " failing driver load", VXGE_DRIVER_NAME); + ret = -EINVAL; + goto _exit4; + } + + /* Always enable HWTS. This will always cause the FCS to be invalid, + * due to the fact that HWTS is using the FCS as the location of the + * timestamp. The HW FCS checking will still correctly determine if + * there is a valid checksum, and the FCS is being removed by the driver + * anyway. So no fucntionality is being lost. Since it is always + * enabled, we now simply use the ioctl call to set whether or not the + * driver should be paying attention to the HWTS. + */ + if (is_privileged == VXGE_HW_OK) { + status = vxge_timestamp_config(hldev); + if (status != VXGE_HW_OK) { + vxge_debug_init(VXGE_ERR, "%s: HWTS enable failed", + VXGE_DRIVER_NAME); + ret = -EFAULT; + goto _exit4; + } + } + + vxge_hw_device_debug_set(hldev, VXGE_ERR, VXGE_COMPONENT_LL); + + /* set private device info */ + pci_set_drvdata(pdev, hldev); + + ll_config->fifo_indicate_max_pkts = VXGE_FIFO_INDICATE_MAX_PKTS; + ll_config->addr_learn_en = addr_learn_en; + ll_config->rth_algorithm = RTH_ALG_JENKINS; + ll_config->rth_hash_type_tcpipv4 = 1; + ll_config->rth_hash_type_ipv4 = 0; + ll_config->rth_hash_type_tcpipv6 = 0; + ll_config->rth_hash_type_ipv6 = 0; + ll_config->rth_hash_type_tcpipv6ex = 0; + ll_config->rth_hash_type_ipv6ex = 0; + ll_config->rth_bkt_sz = RTH_BUCKET_SIZE; + ll_config->tx_pause_enable = VXGE_PAUSE_CTRL_ENABLE; + ll_config->rx_pause_enable = VXGE_PAUSE_CTRL_ENABLE; + + ret = vxge_device_register(hldev, ll_config, high_dma, no_of_vpath, + &vdev); + if (ret) { + ret = -EINVAL; + goto _exit4; + } + + ret = vxge_probe_fw_update(vdev); + if (ret) + goto _exit5; + + vxge_hw_device_debug_set(hldev, VXGE_TRACE, VXGE_COMPONENT_LL); + VXGE_COPY_DEBUG_INFO_TO_LL(vdev, vxge_hw_device_error_level_get(hldev), + vxge_hw_device_trace_level_get(hldev)); + + /* set private HW device info */ + vdev->mtu = VXGE_HW_DEFAULT_MTU; + vdev->bar0 = attr.bar0; + vdev->max_vpath_supported = max_vpath_supported; + vdev->no_of_vpath = no_of_vpath; + + /* Virtual Path count */ + for (i = 0, j = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) { + if (!vxge_bVALn(vpath_mask, i, 1)) + continue; + if (j >= vdev->no_of_vpath) + break; + + vdev->vpaths[j].is_configured = 1; + vdev->vpaths[j].device_id = i; + vdev->vpaths[j].ring.driver_id = j; + vdev->vpaths[j].vdev = vdev; + vdev->vpaths[j].max_mac_addr_cnt = max_mac_vpath; + memcpy((u8 *)vdev->vpaths[j].macaddr, + ll_config->device_hw_info.mac_addrs[i], + ETH_ALEN); + + /* Initialize the mac address list header */ + INIT_LIST_HEAD(&vdev->vpaths[j].mac_addr_list); + + vdev->vpaths[j].mac_addr_cnt = 0; + vdev->vpaths[j].mcast_addr_cnt = 0; + j++; + } + vdev->exec_mode = VXGE_EXEC_MODE_DISABLE; + vdev->max_config_port = max_config_port; + + vdev->vlan_tag_strip = vlan_tag_strip; + + /* map the hashing selector table to the configured vpaths */ + for (i = 0; i < vdev->no_of_vpath; i++) + vdev->vpath_selector[i] = vpath_selector[i]; + + macaddr = (u8 *)vdev->vpaths[0].macaddr; + + ll_config->device_hw_info.serial_number[VXGE_HW_INFO_LEN - 1] = '\0'; + ll_config->device_hw_info.product_desc[VXGE_HW_INFO_LEN - 1] = '\0'; + ll_config->device_hw_info.part_number[VXGE_HW_INFO_LEN - 1] = '\0'; + + vxge_debug_init(VXGE_TRACE, "%s: SERIAL NUMBER: %s", + vdev->ndev->name, ll_config->device_hw_info.serial_number); + + vxge_debug_init(VXGE_TRACE, "%s: PART NUMBER: %s", + vdev->ndev->name, ll_config->device_hw_info.part_number); + + vxge_debug_init(VXGE_TRACE, "%s: Neterion %s Server Adapter", + vdev->ndev->name, ll_config->device_hw_info.product_desc); + + vxge_debug_init(VXGE_TRACE, "%s: MAC ADDR: %pM", + vdev->ndev->name, macaddr); + + vxge_debug_init(VXGE_TRACE, "%s: Link Width x%d", + vdev->ndev->name, vxge_hw_device_link_width_get(hldev)); + + vxge_debug_init(VXGE_TRACE, + "%s: Firmware version : %s Date : %s", vdev->ndev->name, + ll_config->device_hw_info.fw_version.version, + ll_config->device_hw_info.fw_date.date); + + if (new_device) { + switch (ll_config->device_hw_info.function_mode) { + case VXGE_HW_FUNCTION_MODE_SINGLE_FUNCTION: + vxge_debug_init(VXGE_TRACE, + "%s: Single Function Mode Enabled", vdev->ndev->name); + break; + case VXGE_HW_FUNCTION_MODE_MULTI_FUNCTION: + vxge_debug_init(VXGE_TRACE, + "%s: Multi Function Mode Enabled", vdev->ndev->name); + break; + case VXGE_HW_FUNCTION_MODE_SRIOV: + vxge_debug_init(VXGE_TRACE, + "%s: Single Root IOV Mode Enabled", vdev->ndev->name); + break; + case VXGE_HW_FUNCTION_MODE_MRIOV: + vxge_debug_init(VXGE_TRACE, + "%s: Multi Root IOV Mode Enabled", vdev->ndev->name); + break; + } + } + + vxge_print_parm(vdev, vpath_mask); + + /* Store the fw version for ethttool option */ + strcpy(vdev->fw_version, ll_config->device_hw_info.fw_version.version); + memcpy(vdev->ndev->dev_addr, (u8 *)vdev->vpaths[0].macaddr, ETH_ALEN); + + /* Copy the station mac address to the list */ + for (i = 0; i < vdev->no_of_vpath; i++) { + entry = kzalloc(sizeof(struct vxge_mac_addrs), GFP_KERNEL); + if (NULL == entry) { + vxge_debug_init(VXGE_ERR, + "%s: mac_addr_list : memory allocation failed", + vdev->ndev->name); + ret = -EPERM; + goto _exit6; + } + macaddr = (u8 *)&entry->macaddr; + memcpy(macaddr, vdev->ndev->dev_addr, ETH_ALEN); + list_add(&entry->item, &vdev->vpaths[i].mac_addr_list); + vdev->vpaths[i].mac_addr_cnt = 1; + } + + kfree(device_config); + + /* + * INTA is shared in multi-function mode. This is unlike the INTA + * implementation in MR mode, where each VH has its own INTA message. + * - INTA is masked (disabled) as long as at least one function sets + * its TITAN_MASK_ALL_INT.ALARM bit. + * - INTA is unmasked (enabled) when all enabled functions have cleared + * their own TITAN_MASK_ALL_INT.ALARM bit. + * The TITAN_MASK_ALL_INT ALARM & TRAFFIC bits are cleared on power up. + * Though this driver leaves the top level interrupts unmasked while + * leaving the required module interrupt bits masked on exit, there + * could be a rougue driver around that does not follow this procedure + * resulting in a failure to generate interrupts. The following code is + * present to prevent such a failure. + */ + + if (ll_config->device_hw_info.function_mode == + VXGE_HW_FUNCTION_MODE_MULTI_FUNCTION) + if (vdev->config.intr_type == INTA) + vxge_hw_device_unmask_all(hldev); + + vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d Exiting...", + vdev->ndev->name, __func__, __LINE__); + + vxge_hw_device_debug_set(hldev, VXGE_ERR, VXGE_COMPONENT_LL); + VXGE_COPY_DEBUG_INFO_TO_LL(vdev, vxge_hw_device_error_level_get(hldev), + vxge_hw_device_trace_level_get(hldev)); + + kfree(ll_config); + return 0; + +_exit6: + for (i = 0; i < vdev->no_of_vpath; i++) + vxge_free_mac_add_list(&vdev->vpaths[i]); +_exit5: + vxge_device_unregister(hldev); +_exit4: + vxge_hw_device_terminate(hldev); + pci_disable_sriov(pdev); +_exit3: + iounmap(attr.bar0); +_exit2: + pci_release_region(pdev, 0); +_exit1: + pci_disable_device(pdev); +_exit0: + kfree(ll_config); + kfree(device_config); + driver_config->config_dev_cnt--; + driver_config->total_dev_cnt--; + return ret; +} + +/** + * vxge_rem_nic - Free the PCI device + * @pdev: structure containing the PCI related information of the device. + * Description: This function is called by the Pci subsystem to release a + * PCI device and free up all resource held up by the device. + */ +static void vxge_remove(struct pci_dev *pdev) +{ + struct __vxge_hw_device *hldev; + struct vxgedev *vdev; + int i; + + hldev = pci_get_drvdata(pdev); + if (hldev == NULL) + return; + + vdev = netdev_priv(hldev->ndev); + + vxge_debug_entryexit(vdev->level_trace, "%s:%d", __func__, __LINE__); + vxge_debug_init(vdev->level_trace, "%s : removing PCI device...", + __func__); + + for (i = 0; i < vdev->no_of_vpath; i++) + vxge_free_mac_add_list(&vdev->vpaths[i]); + + vxge_device_unregister(hldev); + /* Do not call pci_disable_sriov here, as it will break child devices */ + vxge_hw_device_terminate(hldev); + iounmap(vdev->bar0); + pci_release_region(pdev, 0); + pci_disable_device(pdev); + driver_config->config_dev_cnt--; + driver_config->total_dev_cnt--; + + vxge_debug_init(vdev->level_trace, "%s:%d Device unregistered", + __func__, __LINE__); + vxge_debug_entryexit(vdev->level_trace, "%s:%d Exiting...", __func__, + __LINE__); +} + +static const struct pci_error_handlers vxge_err_handler = { + .error_detected = vxge_io_error_detected, + .slot_reset = vxge_io_slot_reset, + .resume = vxge_io_resume, +}; + +static struct pci_driver vxge_driver = { + .name = VXGE_DRIVER_NAME, + .id_table = vxge_id_table, + .probe = vxge_probe, + .remove = vxge_remove, +#ifdef CONFIG_PM + .suspend = vxge_pm_suspend, + .resume = vxge_pm_resume, +#endif + .err_handler = &vxge_err_handler, +}; + +static int __init +vxge_starter(void) +{ + int ret = 0; + + pr_info("Copyright(c) 2002-2010 Exar Corp.\n"); + pr_info("Driver version: %s\n", DRV_VERSION); + + verify_bandwidth(); + + driver_config = kzalloc(sizeof(struct vxge_drv_config), GFP_KERNEL); + if (!driver_config) + return -ENOMEM; + + ret = pci_register_driver(&vxge_driver); + if (ret) { + kfree(driver_config); + goto err; + } + + if (driver_config->config_dev_cnt && + (driver_config->config_dev_cnt != driver_config->total_dev_cnt)) + vxge_debug_init(VXGE_ERR, + "%s: Configured %d of %d devices", + VXGE_DRIVER_NAME, driver_config->config_dev_cnt, + driver_config->total_dev_cnt); +err: + return ret; +} + +static void __exit +vxge_closer(void) +{ + pci_unregister_driver(&vxge_driver); + kfree(driver_config); +} +module_init(vxge_starter); +module_exit(vxge_closer); |