/* * linux/drivers/net/ehea/ehea_main.c * * eHEA ethernet device driver for IBM eServer System p * * (C) Copyright IBM Corp. 2006 * * Authors: * Christoph Raisch * Jan-Bernd Themann * Thomas Klein * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ehea.h" #include "ehea_qmr.h" #include "ehea_phyp.h" MODULE_LICENSE("GPL"); MODULE_AUTHOR("Christoph Raisch "); MODULE_DESCRIPTION("IBM eServer HEA Driver"); MODULE_VERSION(DRV_VERSION); static int msg_level = -1; static int rq1_entries = EHEA_DEF_ENTRIES_RQ1; static int rq2_entries = EHEA_DEF_ENTRIES_RQ2; static int rq3_entries = EHEA_DEF_ENTRIES_RQ3; static int sq_entries = EHEA_DEF_ENTRIES_SQ; static int use_mcs; static int use_lro; static int lro_max_aggr = EHEA_LRO_MAX_AGGR; static int num_tx_qps = EHEA_NUM_TX_QP; static int prop_carrier_state; module_param(msg_level, int, 0); module_param(rq1_entries, int, 0); module_param(rq2_entries, int, 0); module_param(rq3_entries, int, 0); module_param(sq_entries, int, 0); module_param(prop_carrier_state, int, 0); module_param(use_mcs, int, 0); module_param(use_lro, int, 0); module_param(lro_max_aggr, int, 0); module_param(num_tx_qps, int, 0); MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS"); MODULE_PARM_DESC(msg_level, "msg_level"); MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical " "port to stack. 1:yes, 0:no. Default = 0 "); MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 " "[2^x - 1], x = [6..14]. Default = " __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")"); MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 " "[2^x - 1], x = [6..14]. Default = " __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")"); MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 " "[2^x - 1], x = [6..14]. Default = " __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")"); MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue " "[2^x - 1], x = [6..14]. Default = " __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")"); MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 "); MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = " __MODULE_STRING(EHEA_LRO_MAX_AGGR)); MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, " "Default = 0"); static int port_name_cnt; static LIST_HEAD(adapter_list); static unsigned long ehea_driver_flags; struct work_struct ehea_rereg_mr_task; static DEFINE_MUTEX(dlpar_mem_lock); struct ehea_fw_handle_array ehea_fw_handles; struct ehea_bcmc_reg_array ehea_bcmc_regs; static int __devinit ehea_probe_adapter(struct of_device *dev, const struct of_device_id *id); static int __devexit ehea_remove(struct of_device *dev); static struct of_device_id ehea_device_table[] = { { .name = "lhea", .compatible = "IBM,lhea", }, {}, }; MODULE_DEVICE_TABLE(of, ehea_device_table); static struct of_platform_driver ehea_driver = { .name = "ehea", .match_table = ehea_device_table, .probe = ehea_probe_adapter, .remove = ehea_remove, }; void ehea_dump(void *adr, int len, char *msg) { int x; unsigned char *deb = adr; for (x = 0; x < len; x += 16) { printk(DRV_NAME " %s adr=%p ofs=%04x %016llx %016llx\n", msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8])); deb += 16; } } void ehea_schedule_port_reset(struct ehea_port *port) { if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags)) schedule_work(&port->reset_task); } static void ehea_update_firmware_handles(void) { struct ehea_fw_handle_entry *arr = NULL; struct ehea_adapter *adapter; int num_adapters = 0; int num_ports = 0; int num_portres = 0; int i = 0; int num_fw_handles, k, l; /* Determine number of handles */ list_for_each_entry(adapter, &adapter_list, list) { num_adapters++; for (k = 0; k < EHEA_MAX_PORTS; k++) { struct ehea_port *port = adapter->port[k]; if (!port || (port->state != EHEA_PORT_UP)) continue; num_ports++; num_portres += port->num_def_qps + port->num_add_tx_qps; } } num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES + num_ports * EHEA_NUM_PORT_FW_HANDLES + num_portres * EHEA_NUM_PORTRES_FW_HANDLES; if (num_fw_handles) { arr = kzalloc(num_fw_handles * sizeof(*arr), GFP_KERNEL); if (!arr) return; /* Keep the existing array */ } else goto out_update; list_for_each_entry(adapter, &adapter_list, list) { for (k = 0; k < EHEA_MAX_PORTS; k++) { struct ehea_port *port = adapter->port[k]; if (!port || (port->state != EHEA_PORT_UP)) continue; for (l = 0; l < port->num_def_qps + port->num_add_tx_qps; l++) { struct ehea_port_res *pr = &port->port_res[l]; arr[i].adh = adapter->handle; arr[i++].fwh = pr->qp->fw_handle; arr[i].adh = adapter->handle; arr[i++].fwh = pr->send_cq->fw_handle; arr[i].adh = adapter->handle; arr[i++].fwh = pr->recv_cq->fw_handle; arr[i].adh = adapter->handle; arr[i++].fwh = pr->eq->fw_handle; arr[i].adh = adapter->handle; arr[i++].fwh = pr->send_mr.handle; arr[i].adh = adapter->handle; arr[i++].fwh = pr->recv_mr.handle; } arr[i].adh = adapter->handle; arr[i++].fwh = port->qp_eq->fw_handle; } arr[i].adh = adapter->handle; arr[i++].fwh = adapter->neq->fw_handle; if (adapter->mr.handle) { arr[i].adh = adapter->handle; arr[i++].fwh = adapter->mr.handle; } } out_update: kfree(ehea_fw_handles.arr); ehea_fw_handles.arr = arr; ehea_fw_handles.num_entries = i; } static void ehea_update_bcmc_registrations(void) { struct ehea_bcmc_reg_entry *arr = NULL; struct ehea_adapter *adapter; struct ehea_mc_list *mc_entry; int num_registrations = 0; int i = 0; int k; /* Determine number of registrations */ list_for_each_entry(adapter, &adapter_list, list) for (k = 0; k < EHEA_MAX_PORTS; k++) { struct ehea_port *port = adapter->port[k]; if (!port || (port->state != EHEA_PORT_UP)) continue; num_registrations += 2; /* Broadcast registrations */ list_for_each_entry(mc_entry, &port->mc_list->list,list) num_registrations += 2; } if (num_registrations) { arr = kzalloc(num_registrations * sizeof(*arr), GFP_ATOMIC); if (!arr) return; /* Keep the existing array */ } else goto out_update; list_for_each_entry(adapter, &adapter_list, list) { for (k = 0; k < EHEA_MAX_PORTS; k++) { struct ehea_port *port = adapter->port[k]; if (!port || (port->state != EHEA_PORT_UP)) continue; arr[i].adh = adapter->handle; arr[i].port_id = port->logical_port_id; arr[i].reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED; arr[i++].macaddr = port->mac_addr; arr[i].adh = adapter->handle; arr[i].port_id = port->logical_port_id; arr[i].reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL; arr[i++].macaddr = port->mac_addr; list_for_each_entry(mc_entry, &port->mc_list->list, list) { arr[i].adh = adapter->handle; arr[i].port_id = port->logical_port_id; arr[i].reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED; arr[i++].macaddr = mc_entry->macaddr; arr[i].adh = adapter->handle; arr[i].port_id = port->logical_port_id; arr[i].reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL; arr[i++].macaddr = mc_entry->macaddr; } } } out_update: kfree(ehea_bcmc_regs.arr); ehea_bcmc_regs.arr = arr; ehea_bcmc_regs.num_entries = i; } static struct net_device_stats *ehea_get_stats(struct net_device *dev) { struct ehea_port *port = netdev_priv(dev); struct net_device_stats *stats = &port->stats; struct hcp_ehea_port_cb2 *cb2; u64 hret, rx_packets, tx_packets; int i; memset(stats, 0, sizeof(*stats)); cb2 = kzalloc(PAGE_SIZE, GFP_ATOMIC); if (!cb2) { ehea_error("no mem for cb2"); goto out; } hret = ehea_h_query_ehea_port(port->adapter->handle, port->logical_port_id, H_PORT_CB2, H_PORT_CB2_ALL, cb2); if (hret != H_SUCCESS) { ehea_error("query_ehea_port failed"); goto out_herr; } if (netif_msg_hw(port)) ehea_dump(cb2, sizeof(*cb2), "net_device_stats"); rx_packets = 0; for (i = 0; i < port->num_def_qps; i++) rx_packets += port->port_res[i].rx_packets; tx_packets = 0; for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) tx_packets += port->port_res[i].tx_packets; stats->tx_packets = tx_packets; stats->multicast = cb2->rxmcp; stats->rx_errors = cb2->rxuerr; stats->rx_bytes = cb2->rxo; stats->tx_bytes = cb2->txo; stats->rx_packets = rx_packets; out_herr: kfree(cb2); out: return stats; } static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes) { struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; struct net_device *dev = pr->port->netdev; int max_index_mask = pr->rq1_skba.len - 1; int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes; int adder = 0; int i; pr->rq1_skba.os_skbs = 0; if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { if (nr_of_wqes > 0) pr->rq1_skba.index = index; pr->rq1_skba.os_skbs = fill_wqes; return; } for (i = 0; i < fill_wqes; i++) { if (!skb_arr_rq1[index]) { skb_arr_rq1[index] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE); if (!skb_arr_rq1[index]) { pr->rq1_skba.os_skbs = fill_wqes - i; ehea_error("%s: no mem for skb/%d wqes filled", dev->name, i); break; } } index--; index &= max_index_mask; adder++; } if (adder == 0) return; /* Ring doorbell */ ehea_update_rq1a(pr->qp, adder); } static int ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a) { int ret = 0; struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; struct net_device *dev = pr->port->netdev; int i; for (i = 0; i < pr->rq1_skba.len; i++) { skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE); if (!skb_arr_rq1[i]) { ehea_error("%s: no mem for skb/%d wqes filled", dev->name, i); ret = -ENOMEM; goto out; } } /* Ring doorbell */ ehea_update_rq1a(pr->qp, nr_rq1a); out: return ret; } static int ehea_refill_rq_def(struct ehea_port_res *pr, struct ehea_q_skb_arr *q_skba, int rq_nr, int num_wqes, int wqe_type, int packet_size) { struct net_device *dev = pr->port->netdev; struct ehea_qp *qp = pr->qp; struct sk_buff **skb_arr = q_skba->arr; struct ehea_rwqe *rwqe; int i, index, max_index_mask, fill_wqes; int adder = 0; int ret = 0; fill_wqes = q_skba->os_skbs + num_wqes; q_skba->os_skbs = 0; if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { q_skba->os_skbs = fill_wqes; return ret; } index = q_skba->index; max_index_mask = q_skba->len - 1; for (i = 0; i < fill_wqes; i++) { u64 tmp_addr; struct sk_buff *skb = netdev_alloc_skb(dev, packet_size); if (!skb) { ehea_error("%s: no mem for skb/%d wqes filled", pr->port->netdev->name, i); q_skba->os_skbs = fill_wqes - i; ret = -ENOMEM; break; } skb_reserve(skb, NET_IP_ALIGN); skb_arr[index] = skb; tmp_addr = ehea_map_vaddr(skb->data); if (tmp_addr == -1) { dev_kfree_skb(skb); q_skba->os_skbs = fill_wqes - i; ret = 0; break; } rwqe = ehea_get_next_rwqe(qp, rq_nr); rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type) | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index); rwqe->sg_list[0].l_key = pr->recv_mr.lkey; rwqe->sg_list[0].vaddr = tmp_addr; rwqe->sg_list[0].len = packet_size; rwqe->data_segments = 1; index++; index &= max_index_mask; adder++; } q_skba->index = index; if (adder == 0) goto out; /* Ring doorbell */ iosync(); if (rq_nr == 2) ehea_update_rq2a(pr->qp, adder); else ehea_update_rq3a(pr->qp, adder); out: return ret; } static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes) { return ehea_refill_rq_def(pr, &pr->rq2_skba, 2, nr_of_wqes, EHEA_RWQE2_TYPE, EHEA_RQ2_PKT_SIZE + NET_IP_ALIGN); } static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes) { return ehea_refill_rq_def(pr, &pr->rq3_skba, 3, nr_of_wqes, EHEA_RWQE3_TYPE, EHEA_MAX_PACKET_SIZE + NET_IP_ALIGN); } static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num) { *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5; if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0) return 0; if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) && (cqe->header_length == 0)) return 0; return -EINVAL; } static inline void ehea_fill_skb(struct net_device *dev, struct sk_buff *skb, struct ehea_cqe *cqe) { int length = cqe->num_bytes_transfered - 4; /*remove CRC */ skb_put(skb, length); skb->ip_summed = CHECKSUM_UNNECESSARY; skb->protocol = eth_type_trans(skb, dev); } static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array, int arr_len, struct ehea_cqe *cqe) { int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); struct sk_buff *skb; void *pref; int x; x = skb_index + 1; x &= (arr_len - 1); pref = skb_array[x]; prefetchw(pref); prefetchw(pref + EHEA_CACHE_LINE); pref = (skb_array[x]->data); prefetch(pref); prefetch(pref + EHEA_CACHE_LINE); prefetch(pref + EHEA_CACHE_LINE * 2); prefetch(pref + EHEA_CACHE_LINE * 3); skb = skb_array[skb_index]; skb_array[skb_index] = NULL; return skb; } static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array, int arr_len, int wqe_index) { struct sk_buff *skb; void *pref; int x; x = wqe_index + 1; x &= (arr_len - 1); pref = skb_array[x]; prefetchw(pref); prefetchw(pref + EHEA_CACHE_LINE); pref = (skb_array[x]->data); prefetchw(pref); prefetchw(pref + EHEA_CACHE_LINE); skb = skb_array[wqe_index]; skb_array[wqe_index] = NULL; return skb; } static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq, struct ehea_cqe *cqe, int *processed_rq2, int *processed_rq3) { struct sk_buff *skb; if (cqe->status & EHEA_CQE_STAT_ERR_TCP) pr->p_stats.err_tcp_cksum++; if (cqe->status & EHEA_CQE_STAT_ERR_IP) pr->p_stats.err_ip_cksum++; if (cqe->status & EHEA_CQE_STAT_ERR_CRC) pr->p_stats.err_frame_crc++; if (rq == 2) { *processed_rq2 += 1; skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe); dev_kfree_skb(skb); } else if (rq == 3) { *processed_rq3 += 1; skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe); dev_kfree_skb(skb); } if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) { if (netif_msg_rx_err(pr->port)) { ehea_error("Critical receive error for QP %d. " "Resetting port.", pr->qp->init_attr.qp_nr); ehea_dump(cqe, sizeof(*cqe), "CQE"); } ehea_schedule_port_reset(pr->port); return 1; } return 0; } static int get_skb_hdr(struct sk_buff *skb, void **iphdr, void **tcph, u64 *hdr_flags, void *priv) { struct ehea_cqe *cqe = priv; unsigned int ip_len; struct iphdr *iph; /* non tcp/udp packets */ if (!cqe->header_length) return -1; /* non tcp packet */ skb_reset_network_header(skb); iph = ip_hdr(skb); if (iph->protocol != IPPROTO_TCP) return -1; ip_len = ip_hdrlen(skb); skb_set_transport_header(skb, ip_len); *tcph = tcp_hdr(skb); /* check if ip header and tcp header are complete */ if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb)) return -1; *hdr_flags = LRO_IPV4 | LRO_TCP; *iphdr = iph; return 0; } static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe, struct sk_buff *skb) { int vlan_extracted = (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) && pr->port->vgrp; if (use_lro) { if (vlan_extracted) lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb, pr->port->vgrp, cqe->vlan_tag, cqe); else lro_receive_skb(&pr->lro_mgr, skb, cqe); } else { if (vlan_extracted) vlan_hwaccel_receive_skb(skb, pr->port->vgrp, cqe->vlan_tag); else netif_receive_skb(skb); } } static int ehea_proc_rwqes(struct net_device *dev, struct ehea_port_res *pr, int budget) { struct ehea_port *port = pr->port; struct ehea_qp *qp = pr->qp; struct ehea_cqe *cqe; struct sk_buff *skb; struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr; struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr; int skb_arr_rq1_len = pr->rq1_skba.len; int skb_arr_rq2_len = pr->rq2_skba.len; int skb_arr_rq3_len = pr->rq3_skba.len; int processed, processed_rq1, processed_rq2, processed_rq3; int wqe_index, last_wqe_index, rq, port_reset; processed = processed_rq1 = processed_rq2 = processed_rq3 = 0; last_wqe_index = 0; cqe = ehea_poll_rq1(qp, &wqe_index); while ((processed < budget) && cqe) { ehea_inc_rq1(qp); processed_rq1++; processed++; if (netif_msg_rx_status(port)) ehea_dump(cqe, sizeof(*cqe), "CQE"); last_wqe_index = wqe_index; rmb(); if (!ehea_check_cqe(cqe, &rq)) { if (rq == 1) { /* LL RQ1 */ skb = get_skb_by_index_ll(skb_arr_rq1, skb_arr_rq1_len, wqe_index); if (unlikely(!skb)) { if (netif_msg_rx_err(port)) ehea_error("LL rq1: skb=NULL"); skb = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE); if (!skb) break; } skb_copy_to_linear_data(skb, ((char *)cqe) + 64, cqe->num_bytes_transfered - 4); ehea_fill_skb(dev, skb, cqe); } else if (rq == 2) { /* RQ2 */ skb = get_skb_by_index(skb_arr_rq2, skb_arr_rq2_len, cqe); if (unlikely(!skb)) { if (netif_msg_rx_err(port)) ehea_error("rq2: skb=NULL"); break; } ehea_fill_skb(dev, skb, cqe); processed_rq2++; } else { /* RQ3 */ skb = get_skb_by_index(skb_arr_rq3, skb_arr_rq3_len, cqe); if (unlikely(!skb)) { if (netif_msg_rx_err(port)) ehea_error("rq3: skb=NULL"); break; } ehea_fill_skb(dev, skb, cqe); processed_rq3++; } ehea_proc_skb(pr, cqe, skb); } else { pr->p_stats.poll_receive_errors++; port_reset = ehea_treat_poll_error(pr, rq, cqe, &processed_rq2, &processed_rq3); if (port_reset) break; } cqe = ehea_poll_rq1(qp, &wqe_index); } if (use_lro) lro_flush_all(&pr->lro_mgr); pr->rx_packets += processed; ehea_refill_rq1(pr, last_wqe_index, processed_rq1); ehea_refill_rq2(pr, processed_rq2); ehea_refill_rq3(pr, processed_rq3); return processed; } static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota) { struct sk_buff *skb; struct ehea_cq *send_cq = pr->send_cq; struct ehea_cqe *cqe; int quota = my_quota; int cqe_counter = 0; int swqe_av = 0; int index; unsigned long flags; cqe = ehea_poll_cq(send_cq); while (cqe && (quota > 0)) { ehea_inc_cq(send_cq); cqe_counter++; rmb(); if (cqe->status & EHEA_CQE_STAT_ERR_MASK) { ehea_error("Send Completion Error: Resetting port"); if (netif_msg_tx_err(pr->port)) ehea_dump(cqe, sizeof(*cqe), "Send CQE"); ehea_schedule_port_reset(pr->port); break; } if (netif_msg_tx_done(pr->port)) ehea_dump(cqe, sizeof(*cqe), "CQE"); if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id) == EHEA_SWQE2_TYPE)) { index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); skb = pr->sq_skba.arr[index]; dev_kfree_skb(skb); pr->sq_skba.arr[index] = NULL; } swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id); quota--; cqe = ehea_poll_cq(send_cq); }; ehea_update_feca(send_cq, cqe_counter); atomic_add(swqe_av, &pr->swqe_avail); spin_lock_irqsave(&pr->netif_queue, flags); if (pr->queue_stopped && (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th)) { netif_wake_queue(pr->port->netdev); pr->queue_stopped = 0; } spin_unlock_irqrestore(&pr->netif_queue, flags); return cqe; } #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16 #define EHEA_POLL_MAX_CQES 65535 static int ehea_poll(struct napi_struct *napi, int budget) { struct ehea_port_res *pr = container_of(napi, struct ehea_port_res, napi); struct net_device *dev = pr->port->netdev; struct ehea_cqe *cqe; struct ehea_cqe *cqe_skb = NULL; int force_irq, wqe_index; int rx = 0; force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ); cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); if (!force_irq) rx += ehea_proc_rwqes(dev, pr, budget - rx); while ((rx != budget) || force_irq) { pr->poll_counter = 0; force_irq = 0; netif_rx_complete(napi); ehea_reset_cq_ep(pr->recv_cq); ehea_reset_cq_ep(pr->send_cq); ehea_reset_cq_n1(pr->recv_cq); ehea_reset_cq_n1(pr->send_cq); cqe = ehea_poll_rq1(pr->qp, &wqe_index); cqe_skb = ehea_poll_cq(pr->send_cq); if (!cqe && !cqe_skb) return rx; if (!netif_rx_reschedule(napi)) return rx; cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); rx += ehea_proc_rwqes(dev, pr, budget - rx); } pr->poll_counter++; return rx; } #ifdef CONFIG_NET_POLL_CONTROLLER static void ehea_netpoll(struct net_device *dev) { struct ehea_port *port = netdev_priv(dev); int i; for (i = 0; i < port->num_def_qps; i++) netif_rx_schedule(&port->port_res[i].napi); } #endif static irqreturn_t ehea_recv_irq_handler(int irq, void *param) { struct ehea_port_res *pr = param; netif_rx_schedule(&pr->napi); return IRQ_HANDLED; } static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param) { struct ehea_port *port = param; struct ehea_eqe *eqe; struct ehea_qp *qp; u32 qp_token; eqe = ehea_poll_eq(port->qp_eq); while (eqe) { qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry); ehea_error("QP aff_err: entry=0x%llx, token=0x%x", eqe->entry, qp_token); qp = port->port_res[qp_token].qp; ehea_error_data(port->adapter, qp->fw_handle); eqe = ehea_poll_eq(port->qp_eq); } ehea_schedule_port_reset(port); return IRQ_HANDLED; } static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter, int logical_port) { int i; for (i = 0; i < EHEA_MAX_PORTS; i++) if (adapter->port[i]) if (adapter->port[i]->logical_port_id == logical_port) return adapter->port[i]; return NULL; } int ehea_sense_port_attr(struct ehea_port *port) { int ret; u64 hret; struct hcp_ehea_port_cb0 *cb0; /* may be called via ehea_neq_tasklet() */ cb0 = kzalloc(PAGE_SIZE, GFP_ATOMIC); if (!cb0) { ehea_error("no mem for cb0"); ret = -ENOMEM; goto out; } hret = ehea_h_query_ehea_port(port->adapter->handle, port->logical_port_id, H_PORT_CB0, EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF), cb0); if (hret != H_SUCCESS) { ret = -EIO; goto out_free; } /* MAC address */ port->mac_addr = cb0->port_mac_addr << 16; if (!is_valid_ether_addr((u8 *)&port->mac_addr)) { ret = -EADDRNOTAVAIL; goto out_free; } /* Port speed */ switch (cb0->port_speed) { case H_SPEED_10M_H: port->port_speed = EHEA_SPEED_10M; port->full_duplex = 0; break; case H_SPEED_10M_F: port->port_speed = EHEA_SPEED_10M; port->full_duplex = 1; break; case H_SPEED_100M_H: port->port_speed = EHEA_SPEED_100M; port->full_duplex = 0; break; case H_SPEED_100M_F: port->port_speed = EHEA_SPEED_100M; port->full_duplex = 1; break; case H_SPEED_1G_F: port->port_speed = EHEA_SPEED_1G; port->full_duplex = 1; break; case H_SPEED_10G_F: port->port_speed = EHEA_SPEED_10G; port->full_duplex = 1; break; default: port->port_speed = 0; port->full_duplex = 0; break; } port->autoneg = 1; port->num_mcs = cb0->num_default_qps; /* Number of default QPs */ if (use_mcs) port->num_def_qps = cb0->num_default_qps; else port->num_def_qps = 1; if (!port->num_def_qps) { ret = -EINVAL; goto out_free; } port->num_tx_qps = num_tx_qps; if (port->num_def_qps >= port->num_tx_qps) port->num_add_tx_qps = 0; else port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps; ret = 0; out_free: if (ret || netif_msg_probe(port)) ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr"); kfree(cb0); out: return ret; } int ehea_set_portspeed(struct ehea_port *port, u32 port_speed) { struct hcp_ehea_port_cb4 *cb4; u64 hret; int ret = 0; cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL); if (!cb4) { ehea_error("no mem for cb4"); ret = -ENOMEM; goto out; } cb4->port_speed = port_speed; netif_carrier_off(port->netdev); hret = ehea_h_modify_ehea_port(port->adapter->handle, port->logical_port_id, H_PORT_CB4, H_PORT_CB4_SPEED, cb4); if (hret == H_SUCCESS) { port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0; hret = ehea_h_query_ehea_port(port->adapter->handle, port->logical_port_id, H_PORT_CB4, H_PORT_CB4_SPEED, cb4); if (hret == H_SUCCESS) { switch (cb4->port_speed) { case H_SPEED_10M_H: port->port_speed = EHEA_SPEED_10M; port->full_duplex = 0; break; case H_SPEED_10M_F: port->port_speed = EHEA_SPEED_10M; port->full_duplex = 1; break; case H_SPEED_100M_H: port->port_speed = EHEA_SPEED_100M; port->full_duplex = 0; break; case H_SPEED_100M_F: port->port_speed = EHEA_SPEED_100M; port->full_duplex = 1; break; case H_SPEED_1G_F: port->port_speed = EHEA_SPEED_1G; port->full_duplex = 1; break; case H_SPEED_10G_F: port->port_speed = EHEA_SPEED_10G; port->full_duplex = 1; break; default: port->port_speed = 0; port->full_duplex = 0; break; } } else { ehea_error("Failed sensing port speed"); ret = -EIO; } } else { if (hret == H_AUTHORITY) { ehea_info("Hypervisor denied setting port speed"); ret = -EPERM; } else { ret = -EIO; ehea_error("Failed setting port speed"); } } if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP)) netif_carrier_on(port->netdev); kfree(cb4); out: return ret; } static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe) { int ret; u8 ec; u8 portnum; struct ehea_port *port; ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe); portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe); port = ehea_get_port(adapter, portnum); switch (ec) { case EHEA_EC_PORTSTATE_CHG: /* port state change */ if (!port) { ehea_error("unknown portnum %x", portnum); break; } if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) { if (!netif_carrier_ok(port->netdev)) { ret = ehea_sense_port_attr(port); if (ret) { ehea_error("failed resensing port " "attributes"); break; } if (netif_msg_link(port)) ehea_info("%s: Logical port up: %dMbps " "%s Duplex", port->netdev->name, port->port_speed, port->full_duplex == 1 ? "Full" : "Half"); netif_carrier_on(port->netdev); netif_wake_queue(port->netdev); } } else if (netif_carrier_ok(port->netdev)) { if (netif_msg_link(port)) ehea_info("%s: Logical port down", port->netdev->name); netif_carrier_off(port->netdev); netif_stop_queue(port->netdev); } if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) { port->phy_link = EHEA_PHY_LINK_UP; if (netif_msg_link(port)) ehea_info("%s: Physical port up", port->netdev->name); if (prop_carrier_state) netif_carrier_on(port->netdev); } else { port->phy_link = EHEA_PHY_LINK_DOWN; if (netif_msg_link(port)) ehea_info("%s: Physical port down", port->netdev->name); if (prop_carrier_state) netif_carrier_off(port->netdev); } if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe)) ehea_info("External switch port is primary port"); else ehea_info("External switch port is backup port"); break; case EHEA_EC_ADAPTER_MALFUNC: ehea_error("Adapter malfunction"); break; case EHEA_EC_PORT_MALFUNC: ehea_info("Port malfunction: Device: %s", port->netdev->name); netif_carrier_off(port->netdev); netif_stop_queue(port->netdev); break; default: ehea_error("unknown event code %x, eqe=0x%llX", ec, eqe); break; } } static void ehea_neq_tasklet(unsigned long data) { struct ehea_adapter *adapter = (struct ehea_adapter *)data; struct ehea_eqe *eqe; u64 event_mask; eqe = ehea_poll_eq(adapter->neq); ehea_debug("eqe=%p", eqe); while (eqe) { ehea_debug("*eqe=%lx", eqe->entry); ehea_parse_eqe(adapter, eqe->entry); eqe = ehea_poll_eq(adapter->neq); ehea_debug("next eqe=%p", eqe); } event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1) | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1) | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1); ehea_h_reset_events(adapter->handle, adapter->neq->fw_handle, event_mask); } static irqreturn_t ehea_interrupt_neq(int irq, void *param) { struct ehea_adapter *adapter = param; tasklet_hi_schedule(&adapter->neq_tasklet); return IRQ_HANDLED; } static int ehea_fill_port_res(struct ehea_port_res *pr) { int ret; struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr; ret = ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1 - init_attr->act_nr_rwqes_rq2 - init_attr->act_nr_rwqes_rq3 - 1); ret |= ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1); ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1); return ret; } static int ehea_reg_interrupts(struct net_device *dev) { struct ehea_port *port = netdev_priv(dev); struct ehea_port_res *pr; int i, ret; snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff", dev->name); ret = ibmebus_request_irq(port->qp_eq->attr.ist1, ehea_qp_aff_irq_handler, IRQF_DISABLED, port->int_aff_name, port); if (ret) { ehea_error("failed registering irq for qp_aff_irq_handler:" "ist=%X", port->qp_eq->attr.ist1); goto out_free_qpeq; } if (netif_msg_ifup(port)) ehea_info("irq_handle 0x%X for function qp_aff_irq_handler " "registered", port->qp_eq->attr.ist1); for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) { pr = &port->port_res[i]; snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1, "%s-queue%d", dev->name, i); ret = ibmebus_request_irq(pr->eq->attr.ist1, ehea_recv_irq_handler, IRQF_DISABLED, pr->int_send_name, pr); if (ret) { ehea_error("failed registering irq for ehea_queue " "port_res_nr:%d, ist=%X", i, pr->eq->attr.ist1); goto out_free_req; } if (netif_msg_ifup(port)) ehea_info("irq_handle 0x%X for function ehea_queue_int " "%d registered", pr->eq->attr.ist1, i); } out: return ret; out_free_req: while (--i >= 0) { u32 ist = port->port_res[i].eq->attr.ist1; ibmebus_free_irq(ist, &port->port_res[i]); } out_free_qpeq: ibmebus_free_irq(port->qp_eq->attr.ist1, port); i = port->num_def_qps; goto out; } static void ehea_free_interrupts(struct net_device *dev) { struct ehea_port *port = netdev_priv(dev); struct ehea_port_res *pr; int i; /* send */ for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) { pr = &port->port_res[i]; ibmebus_free_irq(pr->eq->attr.ist1, pr); if (netif_msg_intr(port)) ehea_info("free send irq for res %d with handle 0x%X", i, pr->eq->attr.ist1); } /* associated events */ ibmebus_free_irq(port->qp_eq->attr.ist1, port); if (netif_msg_intr(port)) ehea_info("associated event interrupt for handle 0x%X freed", port->qp_eq->attr.ist1); } static int ehea_configure_port(struct ehea_port *port) { int ret, i; u64 hret, mask; struct hcp_ehea_port_cb0 *cb0; ret = -ENOMEM; cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL); if (!cb0) goto out; cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1) | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1) | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1) | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1) | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER, PXLY_RC_VLAN_FILTER) | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1); for (i = 0; i < port->num_mcs; i++) if (use_mcs) cb0->default_qpn_arr[i] = port->port_res[i].qp->init_attr.qp_nr; else cb0->default_qpn_arr[i] = port->port_res[0].qp->init_attr.qp_nr; if (netif_msg_ifup(port)) ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port"); mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1) | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1); hret = ehea_h_modify_ehea_port(port->adapter->handle, port->logical_port_id, H_PORT_CB0, mask, cb0); ret = -EIO; if (hret != H_SUCCESS) goto out_free; ret = 0; out_free: kfree(cb0); out: return ret; } int ehea_gen_smrs(struct ehea_port_res *pr) { int ret; struct ehea_adapter *adapter = pr->port->adapter; ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr); if (ret) goto out; ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr); if (ret) goto out_free; return 0; out_free: ehea_rem_mr(&pr->send_mr); out: ehea_error("Generating SMRS failed\n"); return -EIO; } int ehea_rem_smrs(struct ehea_port_res *pr) { if ((ehea_rem_mr(&pr->send_mr)) || (ehea_rem_mr(&pr->recv_mr))) return -EIO; else return 0; } static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries) { int arr_size = sizeof(void *) * max_q_entries; q_skba->arr = vmalloc(arr_size); if (!q_skba->arr) return -ENOMEM; memset(q_skba->arr, 0, arr_size); q_skba->len = max_q_entries; q_skba->index = 0; q_skba->os_skbs = 0; return 0; } static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr, struct port_res_cfg *pr_cfg, int queue_token) { struct ehea_adapter *adapter = port->adapter; enum ehea_eq_type eq_type = EHEA_EQ; struct ehea_qp_init_attr *init_attr = NULL; int ret = -EIO; memset(pr, 0, sizeof(struct ehea_port_res)); pr->port = port; spin_lock_init(&pr->xmit_lock); spin_lock_init(&pr->netif_queue); pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0); if (!pr->eq) { ehea_error("create_eq failed (eq)"); goto out_free; } pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq, pr->eq->fw_handle, port->logical_port_id); if (!pr->recv_cq) { ehea_error("create_cq failed (cq_recv)"); goto out_free; } pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq, pr->eq->fw_handle, port->logical_port_id); if (!pr->send_cq) { ehea_error("create_cq failed (cq_send)"); goto out_free; } if (netif_msg_ifup(port)) ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d", pr->send_cq->attr.act_nr_of_cqes, pr->recv_cq->attr.act_nr_of_cqes); init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL); if (!init_attr) { ret = -ENOMEM; ehea_error("no mem for ehea_qp_init_attr"); goto out_free; } init_attr->low_lat_rq1 = 1; init_attr->signalingtype = 1; /* generate CQE if specified in WQE */ init_attr->rq_count = 3; init_attr->qp_token = queue_token; init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq; init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1; init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2; init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3; init_attr->wqe_size_enc_sq = EHEA_SG_SQ; init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1; init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2; init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3; init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD; init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD; init_attr->port_nr = port->logical_port_id; init_attr->send_cq_handle = pr->send_cq->fw_handle; init_attr->recv_cq_handle = pr->recv_cq->fw_handle; init_attr->aff_eq_handle = port->qp_eq->fw_handle; pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr); if (!pr->qp) { ehea_error("create_qp failed"); ret = -EIO; goto out_free; } if (netif_msg_ifup(port)) ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n " "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr, init_attr->act_nr_send_wqes, init_attr->act_nr_rwqes_rq1, init_attr->act_nr_rwqes_rq2, init_attr->act_nr_rwqes_rq3); pr->sq_skba_size = init_attr->act_nr_send_wqes + 1; ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size); ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1); ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1); ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1); if (ret) goto out_free; pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10; if (ehea_gen_smrs(pr) != 0) { ret = -EIO; goto out_free; } atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1); kfree(init_attr); netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64); pr->lro_mgr.max_aggr = pr->port->lro_max_aggr; pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS; pr->lro_mgr.lro_arr = pr->lro_desc; pr->lro_mgr.get_skb_header = get_skb_hdr; pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID; pr->lro_mgr.dev = port->netdev; pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY; pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY; ret = 0; goto out; out_free: kfree(init_attr); vfree(pr->sq_skba.arr); vfree(pr->rq1_skba.arr); vfree(pr->rq2_skba.arr); vfree(pr->rq3_skba.arr); ehea_destroy_qp(pr->qp); ehea_destroy_cq(pr->send_cq); ehea_destroy_cq(pr->recv_cq); ehea_destroy_eq(pr->eq); out: return ret; } static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr) { int ret, i; ret = ehea_destroy_qp(pr->qp); if (!ret) { ehea_destroy_cq(pr->send_cq); ehea_destroy_cq(pr->recv_cq); ehea_destroy_eq(pr->eq); for (i = 0; i < pr->rq1_skba.len; i++) if (pr->rq1_skba.arr[i]) dev_kfree_skb(pr->rq1_skba.arr[i]); for (i = 0; i < pr->rq2_skba.len; i++) if (pr->rq2_skba.arr[i]) dev_kfree_skb(pr->rq2_skba.arr[i]); for (i = 0; i < pr->rq3_skba.len; i++) if (pr->rq3_skba.arr[i]) dev_kfree_skb(pr->rq3_skba.arr[i]); for (i = 0; i < pr->sq_skba.len; i++) if (pr->sq_skba.arr[i]) dev_kfree_skb(pr->sq_skba.arr[i]); vfree(pr->rq1_skba.arr); vfree(pr->rq2_skba.arr); vfree(pr->rq3_skba.arr); vfree(pr->sq_skba.arr); ret = ehea_rem_smrs(pr); } return ret; } /* * The write_* functions store information in swqe which is used by * the hardware to calculate the ip/tcp/udp checksum */ static inline void write_ip_start_end(struct ehea_swqe *swqe, const struct sk_buff *skb) { swqe->ip_start = skb_network_offset(skb); swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1); } static inline void write_tcp_offset_end(struct ehea_swqe *swqe, const struct sk_buff *skb) { swqe->tcp_offset = (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check)); swqe->tcp_end = (u16)skb->len - 1; } static inline void write_udp_offset_end(struct ehea_swqe *swqe, const struct sk_buff *skb) { swqe->tcp_offset = (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check)); swqe->tcp_end = (u16)skb->len - 1; } static void write_swqe2_TSO(struct sk_buff *skb, struct ehea_swqe *swqe, u32 lkey) { struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry; u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0]; int skb_data_size = skb->len - skb->data_len; int headersize; /* Packet is TCP with TSO enabled */ swqe->tx_control |= EHEA_SWQE_TSO; swqe->mss = skb_shinfo(skb)->gso_size; /* copy only eth/ip/tcp headers to immediate data and * the rest of skb->data to sg1entry */ headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb); skb_data_size = skb->len - skb->data_len; if (skb_data_size >= headersize) { /* copy immediate data */ skb_copy_from_linear_data(skb, imm_data, headersize); swqe->immediate_data_length = headersize; if (skb_data_size > headersize) { /* set sg1entry data */ sg1entry->l_key = lkey; sg1entry->len = skb_data_size - headersize; sg1entry->vaddr = ehea_map_vaddr(skb->data + headersize); swqe->descriptors++; } } else ehea_error("cannot handle fragmented headers"); } static void write_swqe2_nonTSO(struct sk_buff *skb, struct ehea_swqe *swqe, u32 lkey) { int skb_data_size = skb->len - skb->data_len; u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0]; struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry; /* Packet is any nonTSO type * * Copy as much as possible skb->data to immediate data and * the rest to sg1entry */ if (skb_data_size >= SWQE2_MAX_IMM) { /* copy immediate data */ skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM); swqe->immediate_data_length = SWQE2_MAX_IMM; if (skb_data_size > SWQE2_MAX_IMM) { /* copy sg1entry data */ sg1entry->l_key = lkey; sg1entry->len = skb_data_size - SWQE2_MAX_IMM; sg1entry->vaddr = ehea_map_vaddr(skb->data + SWQE2_MAX_IMM); swqe->descriptors++; } } else { skb_copy_from_linear_data(skb, imm_data, skb_data_size); swqe->immediate_data_length = skb_data_size; } } static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev, struct ehea_swqe *swqe, u32 lkey) { struct ehea_vsgentry *sg_list, *sg1entry, *sgentry; skb_frag_t *frag; int nfrags, sg1entry_contains_frag_data, i; nfrags = skb_shinfo(skb)->nr_frags; sg1entry = &swqe->u.immdata_desc.sg_entry; sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list; swqe->descriptors = 0; sg1entry_contains_frag_data = 0; if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size) write_swqe2_TSO(skb, swqe, lkey); else write_swqe2_nonTSO(skb, swqe, lkey); /* write descriptors */ if (nfrags > 0) { if (swqe->descriptors == 0) { /* sg1entry not yet used */ frag = &skb_shinfo(skb)->frags[0]; /* copy sg1entry data */ sg1entry->l_key = lkey; sg1entry->len = frag->size; sg1entry->vaddr = ehea_map_vaddr(page_address(frag->page) + frag->page_offset); swqe->descriptors++; sg1entry_contains_frag_data = 1; } for (i = sg1entry_contains_frag_data; i < nfrags; i++) { frag = &skb_shinfo(skb)->frags[i]; sgentry = &sg_list[i - sg1entry_contains_frag_data]; sgentry->l_key = lkey; sgentry->len = frag->size; sgentry->vaddr = ehea_map_vaddr(page_address(frag->page) + frag->page_offset); swqe->descriptors++; } } } static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid) { int ret = 0; u64 hret; u8 reg_type; /* De/Register untagged packets */ reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED; hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, port->logical_port_id, reg_type, port->mac_addr, 0, hcallid); if (hret != H_SUCCESS) { ehea_error("%sregistering bc address failed (tagged)", hcallid == H_REG_BCMC ? "" : "de"); ret = -EIO; goto out_herr; } /* De/Register VLAN packets */ reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL; hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, port->logical_port_id, reg_type, port->mac_addr, 0, hcallid); if (hret != H_SUCCESS) { ehea_error("%sregistering bc address failed (vlan)", hcallid == H_REG_BCMC ? "" : "de"); ret = -EIO; } out_herr: return ret; } static int ehea_set_mac_addr(struct net_device *dev, void *sa) { struct ehea_port *port = netdev_priv(dev); struct sockaddr *mac_addr = sa; struct hcp_ehea_port_cb0 *cb0; int ret; u64 hret; if (!is_valid_ether_addr(mac_addr->sa_data)) { ret = -EADDRNOTAVAIL; goto out; } cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL); if (!cb0) { ehea_error("no mem for cb0"); ret = -ENOMEM; goto out; } memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN); cb0->port_mac_addr = cb0->port_mac_addr >> 16; hret = ehea_h_modify_ehea_port(port->adapter->handle, port->logical_port_id, H_PORT_CB0, EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0); if (hret != H_SUCCESS) { ret = -EIO; goto out_free; } memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len); spin_lock(&ehea_bcmc_regs.lock); /* Deregister old MAC in pHYP */ if (port->state == EHEA_PORT_UP) { ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC); if (ret) goto out_upregs; } port->mac_addr = cb0->port_mac_addr << 16; /* Register new MAC in pHYP */ if (port->state == EHEA_PORT_UP) { ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); if (ret) goto out_upregs; } ret = 0; out_upregs: ehea_update_bcmc_registrations(); spin_unlock(&ehea_bcmc_regs.lock); out_free: kfree(cb0); out: return ret; } static void ehea_promiscuous_error(u64 hret, int enable) { if (hret == H_AUTHORITY) ehea_info("Hypervisor denied %sabling promiscuous mode", enable == 1 ? "en" : "dis"); else ehea_error("failed %sabling promiscuous mode", enable == 1 ? "en" : "dis"); } static void ehea_promiscuous(struct net_device *dev, int enable) { struct ehea_port *port = netdev_priv(dev); struct hcp_ehea_port_cb7 *cb7; u64 hret; if ((enable && port->promisc) || (!enable && !port->promisc)) return; cb7 = kzalloc(PAGE_SIZE, GFP_ATOMIC); if (!cb7) { ehea_error("no mem for cb7"); goto out; } /* Modify Pxs_DUCQPN in CB7 */ cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0; hret = ehea_h_modify_ehea_port(port->adapter->handle, port->logical_port_id, H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7); if (hret) { ehea_promiscuous_error(hret, enable); goto out; } port->promisc = enable; out: kfree(cb7); return; } static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr, u32 hcallid) { u64 hret; u8 reg_type; reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED; hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, port->logical_port_id, reg_type, mc_mac_addr, 0, hcallid); if (hret) goto out; reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL; hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, port->logical_port_id, reg_type, mc_mac_addr, 0, hcallid); out: return hret; } static int ehea_drop_multicast_list(struct net_device *dev) { struct ehea_port *port = netdev_priv(dev); struct ehea_mc_list *mc_entry = port->mc_list; struct list_head *pos; struct list_head *temp; int ret = 0; u64 hret; list_for_each_safe(pos, temp, &(port->mc_list->list)) { mc_entry = list_entry(pos, struct ehea_mc_list, list); hret = ehea_multicast_reg_helper(port, mc_entry->macaddr, H_DEREG_BCMC); if (hret) { ehea_error("failed deregistering mcast MAC"); ret = -EIO; } list_del(pos); kfree(mc_entry); } return ret; } static void ehea_allmulti(struct net_device *dev, int enable) { struct ehea_port *port = netdev_priv(dev); u64 hret; if (!port->allmulti) { if (enable) { /* Enable ALLMULTI */ ehea_drop_multicast_list(dev); hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC); if (!hret) port->allmulti = 1; else ehea_error("failed enabling IFF_ALLMULTI"); } } else if (!enable) { /* Disable ALLMULTI */ hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC); if (!hret) port->allmulti = 0; else ehea_error("failed disabling IFF_ALLMULTI"); } } static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr) { struct ehea_mc_list *ehea_mcl_entry; u64 hret; ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC); if (!ehea_mcl_entry) { ehea_error("no mem for mcl_entry"); return; } INIT_LIST_HEAD(&ehea_mcl_entry->list); memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN); hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr, H_REG_BCMC); if (!hret) list_add(&ehea_mcl_entry->list, &port->mc_list->list); else { ehea_error("failed registering mcast MAC"); kfree(ehea_mcl_entry); } } static void ehea_set_multicast_list(struct net_device *dev) { struct ehea_port *port = netdev_priv(dev); struct dev_mc_list *k_mcl_entry; int ret, i; if (dev->flags & IFF_PROMISC) { ehea_promiscuous(dev, 1); return; } ehea_promiscuous(dev, 0); spin_lock(&ehea_bcmc_regs.lock); if (dev->flags & IFF_ALLMULTI) { ehea_allmulti(dev, 1); goto out; } ehea_allmulti(dev, 0); if (dev->mc_count) { ret = ehea_drop_multicast_list(dev); if (ret) { /* Dropping the current multicast list failed. * Enabling ALL_MULTI is the best we can do. */ ehea_allmulti(dev, 1); } if (dev->mc_count > port->adapter->max_mc_mac) { ehea_info("Mcast registration limit reached (0x%llx). " "Use ALLMULTI!", port->adapter->max_mc_mac); goto out; } for (i = 0, k_mcl_entry = dev->mc_list; i < dev->mc_count; i++, k_mcl_entry = k_mcl_entry->next) ehea_add_multicast_entry(port, k_mcl_entry->dmi_addr); } out: ehea_update_bcmc_registrations(); spin_unlock(&ehea_bcmc_regs.lock); return; } static int ehea_change_mtu(struct net_device *dev, int new_mtu) { if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE)) return -EINVAL; dev->mtu = new_mtu; return 0; } static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev, struct ehea_swqe *swqe, u32 lkey) { if (skb->protocol == htons(ETH_P_IP)) { const struct iphdr *iph = ip_hdr(skb); /* IPv4 */ swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IP_CHECKSUM | EHEA_SWQE_TCP_CHECKSUM | EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_DESCRIPTORS_PRESENT; write_ip_start_end(swqe, skb); if (iph->protocol == IPPROTO_UDP) { if ((iph->frag_off & IP_MF) || (iph->frag_off & IP_OFFSET)) /* IP fragment, so don't change cs */ swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM; else write_udp_offset_end(swqe, skb); } else if (iph->protocol == IPPROTO_TCP) { write_tcp_offset_end(swqe, skb); } /* icmp (big data) and ip segmentation packets (all other ip packets) do not require any special handling */ } else { /* Other Ethernet Protocol */ swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_DESCRIPTORS_PRESENT; } write_swqe2_data(skb, dev, swqe, lkey); } static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev, struct ehea_swqe *swqe) { int nfrags = skb_shinfo(skb)->nr_frags; u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0]; skb_frag_t *frag; int i; if (skb->protocol == htons(ETH_P_IP)) { const struct iphdr *iph = ip_hdr(skb); /* IPv4 */ write_ip_start_end(swqe, skb); if (iph->protocol == IPPROTO_TCP) { swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IP_CHECKSUM | EHEA_SWQE_TCP_CHECKSUM | EHEA_SWQE_IMM_DATA_PRESENT; write_tcp_offset_end(swqe, skb); } else if (iph->protocol == IPPROTO_UDP) { if ((iph->frag_off & IP_MF) || (iph->frag_off & IP_OFFSET)) /* IP fragment, so don't change cs */ swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT; else { swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IP_CHECKSUM | EHEA_SWQE_TCP_CHECKSUM | EHEA_SWQE_IMM_DATA_PRESENT; write_udp_offset_end(swqe, skb); } } else { /* icmp (big data) and ip segmentation packets (all other ip packets) */ swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IP_CHECKSUM | EHEA_SWQE_IMM_DATA_PRESENT; } } else { /* Other Ethernet Protocol */ swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT; } /* copy (immediate) data */ if (nfrags == 0) { /* data is in a single piece */ skb_copy_from_linear_data(skb, imm_data, skb->len); } else { /* first copy data from the skb->data buffer ... */ skb_copy_from_linear_data(skb, imm_data, skb->len - skb->data_len); imm_data += skb->len - skb->data_len; /* ... then copy data from the fragments */ for (i = 0; i < nfrags; i++) { frag = &skb_shinfo(skb)->frags[i]; memcpy(imm_data, page_address(frag->page) + frag->page_offset, frag->size); imm_data += frag->size; } } swqe->immediate_data_length = skb->len; dev_kfree_skb(skb); } static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps) { struct tcphdr *tcp; u32 tmp; if ((skb->protocol == htons(ETH_P_IP)) && (ip_hdr(skb)->protocol == IPPROTO_TCP)) { tcp = (struct tcphdr *)(skb_network_header(skb) + (ip_hdr(skb)->ihl * 4)); tmp = (tcp->source + (tcp->dest << 16)) % 31; tmp += ip_hdr(skb)->daddr % 31; return tmp % num_qps; } else return 0; } static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct ehea_port *port = netdev_priv(dev); struct ehea_swqe *swqe; unsigned long flags; u32 lkey; int swqe_index; struct ehea_port_res *pr; pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)]; if (!spin_trylock(&pr->xmit_lock)) return NETDEV_TX_BUSY; if (pr->queue_stopped) { spin_unlock(&pr->xmit_lock); return NETDEV_TX_BUSY; } swqe = ehea_get_swqe(pr->qp, &swqe_index); memset(swqe, 0, SWQE_HEADER_SIZE); atomic_dec(&pr->swqe_avail); if (skb->len <= SWQE3_MAX_IMM) { u32 sig_iv = port->sig_comp_iv; u32 swqe_num = pr->swqe_id_counter; ehea_xmit3(skb, dev, swqe); swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE) | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num); if (pr->swqe_ll_count >= (sig_iv - 1)) { swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL, sig_iv); swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; pr->swqe_ll_count = 0; } else pr->swqe_ll_count += 1; } else { swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE) | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter) | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1) | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index); pr->sq_skba.arr[pr->sq_skba.index] = skb; pr->sq_skba.index++; pr->sq_skba.index &= (pr->sq_skba.len - 1); lkey = pr->send_mr.lkey; ehea_xmit2(skb, dev, swqe, lkey); swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; } pr->swqe_id_counter += 1; if (port->vgrp && vlan_tx_tag_present(skb)) { swqe->tx_control |= EHEA_SWQE_VLAN_INSERT; swqe->vlan_tag = vlan_tx_tag_get(skb); } if (netif_msg_tx_queued(port)) { ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr); ehea_dump(swqe, 512, "swqe"); } if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { netif_stop_queue(dev); swqe->tx_control |= EHEA_SWQE_PURGE; } ehea_post_swqe(pr->qp, swqe); pr->tx_packets++; if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) { spin_lock_irqsave(&pr->netif_queue, flags); if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) { pr->p_stats.queue_stopped++; netif_stop_queue(dev); pr->queue_stopped = 1; } spin_unlock_irqrestore(&pr->netif_queue, flags); } dev->trans_start = jiffies; spin_unlock(&pr->xmit_lock); return NETDEV_TX_OK; } static void ehea_vlan_rx_register(struct net_device *dev, struct vlan_group *grp) { struct ehea_port *port = netdev_priv(dev); struct ehea_adapter *adapter = port->adapter; struct hcp_ehea_port_cb1 *cb1; u64 hret; port->vgrp = grp; cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL); if (!cb1) { ehea_error("no mem for cb1"); goto out; } hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, H_PORT_CB1, H_PORT_CB1_ALL, cb1); if (hret != H_SUCCESS) ehea_error("modify_ehea_port failed"); kfree(cb1); out: return; } static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid) { struct ehea_port *port = netdev_priv(dev); struct ehea_adapter *adapter = port->adapter; struct hcp_ehea_port_cb1 *cb1; int index; u64 hret; cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL); if (!cb1) { ehea_error("no mem for cb1"); goto out; } hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, H_PORT_CB1, H_PORT_CB1_ALL, cb1); if (hret != H_SUCCESS) { ehea_error("query_ehea_port failed"); goto out; } index = (vid / 64); cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F))); hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, H_PORT_CB1, H_PORT_CB1_ALL, cb1); if (hret != H_SUCCESS) ehea_error("modify_ehea_port failed"); out: kfree(cb1); return; } static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid) { struct ehea_port *port = netdev_priv(dev); struct ehea_adapter *adapter = port->adapter; struct hcp_ehea_port_cb1 *cb1; int index; u64 hret; vlan_group_set_device(port->vgrp, vid, NULL); cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL); if (!cb1) { ehea_error("no mem for cb1"); goto out; } hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, H_PORT_CB1, H_PORT_CB1_ALL, cb1); if (hret != H_SUCCESS) { ehea_error("query_ehea_port failed"); goto out; } index = (vid / 64); cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F))); hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, H_PORT_CB1, H_PORT_CB1_ALL, cb1); if (hret != H_SUCCESS) ehea_error("modify_ehea_port failed"); out: kfree(cb1); return; } int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp) { int ret = -EIO; u64 hret; u16 dummy16 = 0; u64 dummy64 = 0; struct hcp_modify_qp_cb0 *cb0; cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL); if (!cb0) { ret = -ENOMEM; goto out; } hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); if (hret != H_SUCCESS) { ehea_error("query_ehea_qp failed (1)"); goto out; } cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED; hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, &dummy64, &dummy64, &dummy16, &dummy16); if (hret != H_SUCCESS) { ehea_error("modify_ehea_qp failed (1)"); goto out; } hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); if (hret != H_SUCCESS) { ehea_error("query_ehea_qp failed (2)"); goto out; } cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED; hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, &dummy64, &dummy64, &dummy16, &dummy16); if (hret != H_SUCCESS) { ehea_error("modify_ehea_qp failed (2)"); goto out; } hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); if (hret != H_SUCCESS) { ehea_error("query_ehea_qp failed (3)"); goto out; } cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND; hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, &dummy64, &dummy64, &dummy16, &dummy16); if (hret != H_SUCCESS) { ehea_error("modify_ehea_qp failed (3)"); goto out; } hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); if (hret != H_SUCCESS) { ehea_error("query_ehea_qp failed (4)"); goto out; } ret = 0; out: kfree(cb0); return ret; } static int ehea_port_res_setup(struct ehea_port *port, int def_qps, int add_tx_qps) { int ret, i; struct port_res_cfg pr_cfg, pr_cfg_small_rx; enum ehea_eq_type eq_type = EHEA_EQ; port->qp_eq = ehea_create_eq(port->adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 1); if (!port->qp_eq) { ret = -EINVAL; ehea_error("ehea_create_eq failed (qp_eq)"); goto out_kill_eq; } pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries; pr_cfg.max_entries_scq = sq_entries * 2; pr_cfg.max_entries_sq = sq_entries; pr_cfg.max_entries_rq1 = rq1_entries; pr_cfg.max_entries_rq2 = rq2_entries; pr_cfg.max_entries_rq3 = rq3_entries; pr_cfg_small_rx.max_entries_rcq = 1; pr_cfg_small_rx.max_entries_scq = sq_entries; pr_cfg_small_rx.max_entries_sq = sq_entries; pr_cfg_small_rx.max_entries_rq1 = 1; pr_cfg_small_rx.max_entries_rq2 = 1; pr_cfg_small_rx.max_entries_rq3 = 1; for (i = 0; i < def_qps; i++) { ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i); if (ret) goto out_clean_pr; } for (i = def_qps; i < def_qps + add_tx_qps; i++) { ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg_small_rx, i); if (ret) goto out_clean_pr; } return 0; out_clean_pr: while (--i >= 0) ehea_clean_portres(port, &port->port_res[i]); out_kill_eq: ehea_destroy_eq(port->qp_eq); return ret; } static int ehea_clean_all_portres(struct ehea_port *port) { int ret = 0; int i; for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) ret |= ehea_clean_portres(port, &port->port_res[i]); ret |= ehea_destroy_eq(port->qp_eq); return ret; } static void ehea_remove_adapter_mr(struct ehea_adapter *adapter) { if (adapter->active_ports) return; ehea_rem_mr(&adapter->mr); } static int ehea_add_adapter_mr(struct ehea_adapter *adapter) { if (adapter->active_ports) return 0; return ehea_reg_kernel_mr(adapter, &adapter->mr); } static int ehea_up(struct net_device *dev) { int ret, i; struct ehea_port *port = netdev_priv(dev); if (port->state == EHEA_PORT_UP) return 0; mutex_lock(&ehea_fw_handles.lock); ret = ehea_port_res_setup(port, port->num_def_qps, port->num_add_tx_qps); if (ret) { ehea_error("port_res_failed"); goto out; } /* Set default QP for this port */ ret = ehea_configure_port(port); if (ret) { ehea_error("ehea_configure_port failed. ret:%d", ret); goto out_clean_pr; } ret = ehea_reg_interrupts(dev); if (ret) { ehea_error("reg_interrupts failed. ret:%d", ret); goto out_clean_pr; } for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) { ret = ehea_activate_qp(port->adapter, port->port_res[i].qp); if (ret) { ehea_error("activate_qp failed"); goto out_free_irqs; } } for (i = 0; i < port->num_def_qps; i++) { ret = ehea_fill_port_res(&port->port_res[i]); if (ret) { ehea_error("out_free_irqs"); goto out_free_irqs; } } spin_lock(&ehea_bcmc_regs.lock); ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); if (ret) { ret = -EIO; goto out_free_irqs; } port->state = EHEA_PORT_UP; ret = 0; goto out; out_free_irqs: ehea_free_interrupts(dev); out_clean_pr: ehea_clean_all_portres(port); out: if (ret) ehea_info("Failed starting %s. ret=%i", dev->name, ret); ehea_update_bcmc_registrations(); spin_unlock(&ehea_bcmc_regs.lock); ehea_update_firmware_handles(); mutex_unlock(&ehea_fw_handles.lock); return ret; } static void port_napi_disable(struct ehea_port *port) { int i; for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) napi_disable(&port->port_res[i].napi); } static void port_napi_enable(struct ehea_port *port) { int i; for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) napi_enable(&port->port_res[i].napi); } static int ehea_open(struct net_device *dev) { int ret; struct ehea_port *port = netdev_priv(dev); mutex_lock(&port->port_lock); if (netif_msg_ifup(port)) ehea_info("enabling port %s", dev->name); ret = ehea_up(dev); if (!ret) { port_napi_enable(port); netif_start_queue(dev); } mutex_unlock(&port->port_lock); return ret; } static int ehea_down(struct net_device *dev) { int ret; struct ehea_port *port = netdev_priv(dev); if (port->state == EHEA_PORT_DOWN) return 0; mutex_lock(&ehea_fw_handles.lock); spin_lock(&ehea_bcmc_regs.lock); ehea_drop_multicast_list(dev); ehea_broadcast_reg_helper(port, H_DEREG_BCMC); ehea_free_interrupts(dev); port->state = EHEA_PORT_DOWN; ehea_update_bcmc_registrations(); spin_unlock(&ehea_bcmc_regs.lock); ret = ehea_clean_all_portres(port); if (ret) ehea_info("Failed freeing resources for %s. ret=%i", dev->name, ret); ehea_update_firmware_handles(); mutex_unlock(&ehea_fw_handles.lock); return ret; } static int ehea_stop(struct net_device *dev) { int ret; struct ehea_port *port = netdev_priv(dev); if (netif_msg_ifdown(port)) ehea_info("disabling port %s", dev->name); set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); cancel_work_sync(&port->reset_task); mutex_lock(&port->port_lock); netif_stop_queue(dev); port_napi_disable(port); ret = ehea_down(dev); mutex_unlock(&port->port_lock); clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); return ret; } static void ehea_purge_sq(struct ehea_qp *orig_qp) { struct ehea_qp qp = *orig_qp; struct ehea_qp_init_attr *init_attr = &qp.init_attr; struct ehea_swqe *swqe; int wqe_index; int i; for (i = 0; i < init_attr->act_nr_send_wqes; i++) { swqe = ehea_get_swqe(&qp, &wqe_index); swqe->tx_control |= EHEA_SWQE_PURGE; } } static void ehea_flush_sq(struct ehea_port *port) { int i; for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) { struct ehea_port_res *pr = &port->port_res[i]; int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count; int k = 0; while (atomic_read(&pr->swqe_avail) < swqe_max) { msleep(5); if (++k == 20) break; } } } int ehea_stop_qps(struct net_device *dev) { struct ehea_port *port = netdev_priv(dev); struct ehea_adapter *adapter = port->adapter; struct hcp_modify_qp_cb0 *cb0; int ret = -EIO; int dret; int i; u64 hret; u64 dummy64 = 0; u16 dummy16 = 0; cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL); if (!cb0) { ret = -ENOMEM; goto out; } for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) { struct ehea_port_res *pr = &port->port_res[i]; struct ehea_qp *qp = pr->qp; /* Purge send queue */ ehea_purge_sq(qp); /* Disable queue pair */ hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); if (hret != H_SUCCESS) { ehea_error("query_ehea_qp failed (1)"); goto out; } cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED; hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, &dummy64, &dummy64, &dummy16, &dummy16); if (hret != H_SUCCESS) { ehea_error("modify_ehea_qp failed (1)"); goto out; } hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); if (hret != H_SUCCESS) { ehea_error("query_ehea_qp failed (2)"); goto out; } /* deregister shared memory regions */ dret = ehea_rem_smrs(pr); if (dret) { ehea_error("unreg shared memory region failed"); goto out; } } ret = 0; out: kfree(cb0); return ret; } void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr) { struct ehea_qp qp = *orig_qp; struct ehea_qp_init_attr *init_attr = &qp.init_attr; struct ehea_rwqe *rwqe; struct sk_buff **skba_rq2 = pr->rq2_skba.arr; struct sk_buff **skba_rq3 = pr->rq3_skba.arr; struct sk_buff *skb; u32 lkey = pr->recv_mr.lkey; int i; int index; for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) { rwqe = ehea_get_next_rwqe(&qp, 2); rwqe->sg_list[0].l_key = lkey; index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); skb = skba_rq2[index]; if (skb) rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); } for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) { rwqe = ehea_get_next_rwqe(&qp, 3); rwqe->sg_list[0].l_key = lkey; index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); skb = skba_rq3[index]; if (skb) rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); } } int ehea_restart_qps(struct net_device *dev) { struct ehea_port *port = netdev_priv(dev); struct ehea_adapter *adapter = port->adapter; int ret = 0; int i; struct hcp_modify_qp_cb0 *cb0; u64 hret; u64 dummy64 = 0; u16 dummy16 = 0; cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL); if (!cb0) { ret = -ENOMEM; goto out; } for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) { struct ehea_port_res *pr = &port->port_res[i]; struct ehea_qp *qp = pr->qp; ret = ehea_gen_smrs(pr); if (ret) { ehea_error("creation of shared memory regions failed"); goto out; } ehea_update_rqs(qp, pr); /* Enable queue pair */ hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); if (hret != H_SUCCESS) { ehea_error("query_ehea_qp failed (1)"); goto out; } cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; cb0->qp_ctl_reg |= H_QP_CR_ENABLED; hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, &dummy64, &dummy64, &dummy16, &dummy16); if (hret != H_SUCCESS) { ehea_error("modify_ehea_qp failed (1)"); goto out; } hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); if (hret != H_SUCCESS) { ehea_error("query_ehea_qp failed (2)"); goto out; } /* refill entire queue */ ehea_refill_rq1(pr, pr->rq1_skba.index, 0); ehea_refill_rq2(pr, 0); ehea_refill_rq3(pr, 0); } out: kfree(cb0); return ret; } static void ehea_reset_port(struct work_struct *work) { int ret; struct ehea_port *port = container_of(work, struct ehea_port, reset_task); struct net_device *dev = port->netdev; port->resets++; mutex_lock(&port->port_lock); netif_stop_queue(dev); port_napi_disable(port); ehea_down(dev); ret = ehea_up(dev); if (ret) goto out; ehea_set_multicast_list(dev); if (netif_msg_timer(port)) ehea_info("Device %s resetted successfully", dev->name); port_napi_enable(port); netif_wake_queue(dev); out: mutex_unlock(&port->port_lock); return; } static void ehea_rereg_mrs(struct work_struct *work) { int ret, i; struct ehea_adapter *adapter; mutex_lock(&dlpar_mem_lock); ehea_info("LPAR memory changed - re-initializing driver"); list_for_each_entry(adapter, &adapter_list, list) if (adapter->active_ports) { /* Shutdown all ports */ for (i = 0; i < EHEA_MAX_PORTS; i++) { struct ehea_port *port = adapter->port[i]; struct net_device *dev; if (!port) continue; dev = port->netdev; if (dev->flags & IFF_UP) { mutex_lock(&port->port_lock); netif_stop_queue(dev); ehea_flush_sq(port); ret = ehea_stop_qps(dev); if (ret) { mutex_unlock(&port->port_lock); goto out; } port_napi_disable(port); mutex_unlock(&port->port_lock); } } /* Unregister old memory region */ ret = ehea_rem_mr(&adapter->mr); if (ret) { ehea_error("unregister MR failed - driver" " inoperable!"); goto out; } } clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags); list_for_each_entry(adapter, &adapter_list, list) if (adapter->active_ports) { /* Register new memory region */ ret = ehea_reg_kernel_mr(adapter, &adapter->mr); if (ret) { ehea_error("register MR failed - driver" " inoperable!"); goto out; } /* Restart all ports */ for (i = 0; i < EHEA_MAX_PORTS; i++) { struct ehea_port *port = adapter->port[i]; if (port) { struct net_device *dev = port->netdev; if (dev->flags & IFF_UP) { mutex_lock(&port->port_lock); port_napi_enable(port); ret = ehea_restart_qps(dev); if (!ret) netif_wake_queue(dev); mutex_unlock(&port->port_lock); } } } } ehea_info("re-initializing driver complete"); out: mutex_unlock(&dlpar_mem_lock); return; } static void ehea_tx_watchdog(struct net_device *dev) { struct ehea_port *port = netdev_priv(dev); if (netif_carrier_ok(dev) && !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags)) ehea_schedule_port_reset(port); } int ehea_sense_adapter_attr(struct ehea_adapter *adapter) { struct hcp_query_ehea *cb; u64 hret; int ret; cb = kzalloc(PAGE_SIZE, GFP_KERNEL); if (!cb) { ret = -ENOMEM; goto out; } hret = ehea_h_query_ehea(adapter->handle, cb); if (hret != H_SUCCESS) { ret = -EIO; goto out_herr; } adapter->max_mc_mac = cb->max_mc_mac - 1; ret = 0; out_herr: kfree(cb); out: return ret; } int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo) { struct hcp_ehea_port_cb4 *cb4; u64 hret; int ret = 0; *jumbo = 0; /* (Try to) enable *jumbo frames */ cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL); if (!cb4) { ehea_error("no mem for cb4"); ret = -ENOMEM; goto out; } else { hret = ehea_h_query_ehea_port(port->adapter->handle, port->logical_port_id, H_PORT_CB4, H_PORT_CB4_JUMBO, cb4); if (hret == H_SUCCESS) { if (cb4->jumbo_frame) *jumbo = 1; else { cb4->jumbo_frame = 1; hret = ehea_h_modify_ehea_port(port->adapter-> handle, port-> logical_port_id, H_PORT_CB4, H_PORT_CB4_JUMBO, cb4); if (hret == H_SUCCESS) *jumbo = 1; } } else ret = -EINVAL; kfree(cb4); } out: return ret; } static ssize_t ehea_show_port_id(struct device *dev, struct device_attribute *attr, char *buf) { struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); return sprintf(buf, "%d", port->logical_port_id); } static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id, NULL); static void __devinit logical_port_release(struct device *dev) { struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); of_node_put(port->ofdev.node); } static struct device *ehea_register_port(struct ehea_port *port, struct device_node *dn) { int ret; port->ofdev.node = of_node_get(dn); port->ofdev.dev.parent = &port->adapter->ofdev->dev; port->ofdev.dev.bus = &ibmebus_bus_type; dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++); port->ofdev.dev.release = logical_port_release; ret = of_device_register(&port->ofdev); if (ret) { ehea_error("failed to register device. ret=%d", ret); goto out; } ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id); if (ret) { ehea_error("failed to register attributes, ret=%d", ret); goto out_unreg_of_dev; } return &port->ofdev.dev; out_unreg_of_dev: of_device_unregister(&port->ofdev); out: return NULL; } static void ehea_unregister_port(struct ehea_port *port) { device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id); of_device_unregister(&port->ofdev); } struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter, u32 logical_port_id, struct device_node *dn) { int ret; struct net_device *dev; struct ehea_port *port; struct device *port_dev; int jumbo; /* allocate memory for the port structures */ dev = alloc_etherdev(sizeof(struct ehea_port)); if (!dev) { ehea_error("no mem for net_device"); ret = -ENOMEM; goto out_err; } port = netdev_priv(dev); mutex_init(&port->port_lock); port->state = EHEA_PORT_DOWN; port->sig_comp_iv = sq_entries / 10; port->adapter = adapter; port->netdev = dev; port->logical_port_id = logical_port_id; port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT); port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL); if (!port->mc_list) { ret = -ENOMEM; goto out_free_ethdev; } INIT_LIST_HEAD(&port->mc_list->list); ret = ehea_sense_port_attr(port); if (ret) goto out_free_mc_list; port_dev = ehea_register_port(port, dn); if (!port_dev) goto out_free_mc_list; SET_NETDEV_DEV(dev, port_dev); /* initialize net_device structure */ memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN); dev->open = ehea_open; #ifdef CONFIG_NET_POLL_CONTROLLER dev->poll_controller = ehea_netpoll; #endif dev->stop = ehea_stop; dev->hard_start_xmit = ehea_start_xmit; dev->get_stats = ehea_get_stats; dev->set_multicast_list = ehea_set_multicast_list; dev->set_mac_address = ehea_set_mac_addr; dev->change_mtu = ehea_change_mtu; dev->vlan_rx_register = ehea_vlan_rx_register; dev->vlan_rx_add_vid = ehea_vlan_rx_add_vid; dev->vlan_rx_kill_vid = ehea_vlan_rx_kill_vid; dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER | NETIF_F_LLTX; dev->tx_timeout = &ehea_tx_watchdog; dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT; INIT_WORK(&port->reset_task, ehea_reset_port); ehea_set_ethtool_ops(dev); ret = register_netdev(dev); if (ret) { ehea_error("register_netdev failed. ret=%d", ret); goto out_unreg_port; } port->lro_max_aggr = lro_max_aggr; ret = ehea_get_jumboframe_status(port, &jumbo); if (ret) ehea_error("failed determining jumbo frame status for %s", port->netdev->name); ehea_info("%s: Jumbo frames are %sabled", dev->name, jumbo == 1 ? "en" : "dis"); adapter->active_ports++; return port; out_unreg_port: ehea_unregister_port(port); out_free_mc_list: kfree(port->mc_list); out_free_ethdev: free_netdev(dev); out_err: ehea_error("setting up logical port with id=%d failed, ret=%d", logical_port_id, ret); return NULL; } static void ehea_shutdown_single_port(struct ehea_port *port) { struct ehea_adapter *adapter = port->adapter; unregister_netdev(port->netdev); ehea_unregister_port(port); kfree(port->mc_list); free_netdev(port->netdev); adapter->active_ports--; } static int ehea_setup_ports(struct ehea_adapter *adapter) { struct device_node *lhea_dn; struct device_node *eth_dn = NULL; const u32 *dn_log_port_id; int i = 0; lhea_dn = adapter->ofdev->node; while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", NULL); if (!dn_log_port_id) { ehea_error("bad device node: eth_dn name=%s", eth_dn->full_name); continue; } if (ehea_add_adapter_mr(adapter)) { ehea_error("creating MR failed"); of_node_put(eth_dn); return -EIO; } adapter->port[i] = ehea_setup_single_port(adapter, *dn_log_port_id, eth_dn); if (adapter->port[i]) ehea_info("%s -> logical port id #%d", adapter->port[i]->netdev->name, *dn_log_port_id); else ehea_remove_adapter_mr(adapter); i++; }; return 0; } static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter, u32 logical_port_id) { struct device_node *lhea_dn; struct device_node *eth_dn = NULL; const u32 *dn_log_port_id; lhea_dn = adapter->ofdev->node; while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", NULL); if (dn_log_port_id) if (*dn_log_port_id == logical_port_id) return eth_dn; }; return NULL; } static ssize_t ehea_probe_port(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct ehea_adapter *adapter = dev->driver_data; struct ehea_port *port; struct device_node *eth_dn = NULL; int i; u32 logical_port_id; sscanf(buf, "%d", &logical_port_id); port = ehea_get_port(adapter, logical_port_id); if (port) { ehea_info("adding port with logical port id=%d failed. port " "already configured as %s.", logical_port_id, port->netdev->name); return -EINVAL; } eth_dn = ehea_get_eth_dn(adapter, logical_port_id); if (!eth_dn) { ehea_info("no logical port with id %d found", logical_port_id); return -EINVAL; } if (ehea_add_adapter_mr(adapter)) { ehea_error("creating MR failed"); return -EIO; } port = ehea_setup_single_port(adapter, logical_port_id, eth_dn); of_node_put(eth_dn); if (port) { for (i = 0; i < EHEA_MAX_PORTS; i++) if (!adapter->port[i]) { adapter->port[i] = port; break; } ehea_info("added %s (logical port id=%d)", port->netdev->name, logical_port_id); } else { ehea_remove_adapter_mr(adapter); return -EIO; } return (ssize_t) count; } static ssize_t ehea_remove_port(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct ehea_adapter *adapter = dev->driver_data; struct ehea_port *port; int i; u32 logical_port_id; sscanf(buf, "%d", &logical_port_id); port = ehea_get_port(adapter, logical_port_id); if (port) { ehea_info("removed %s (logical port id=%d)", port->netdev->name, logical_port_id); ehea_shutdown_single_port(port); for (i = 0; i < EHEA_MAX_PORTS; i++) if (adapter->port[i] == port) { adapter->port[i] = NULL; break; } } else { ehea_error("removing port with logical port id=%d failed. port " "not configured.", logical_port_id); return -EINVAL; } ehea_remove_adapter_mr(adapter); return (ssize_t) count; } static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port); static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port); int ehea_create_device_sysfs(struct of_device *dev) { int ret = device_create_file(&dev->dev, &dev_attr_probe_port); if (ret) goto out; ret = device_create_file(&dev->dev, &dev_attr_remove_port); out: return ret; } void ehea_remove_device_sysfs(struct of_device *dev) { device_remove_file(&dev->dev, &dev_attr_probe_port); device_remove_file(&dev->dev, &dev_attr_remove_port); } static int __devinit ehea_probe_adapter(struct of_device *dev, const struct of_device_id *id) { struct ehea_adapter *adapter; const u64 *adapter_handle; int ret; if (!dev || !dev->node) { ehea_error("Invalid ibmebus device probed"); return -EINVAL; } mutex_lock(&ehea_fw_handles.lock); adapter = kzalloc(sizeof(*adapter), GFP_KERNEL); if (!adapter) { ret = -ENOMEM; dev_err(&dev->dev, "no mem for ehea_adapter\n"); goto out; } list_add(&adapter->list, &adapter_list); adapter->ofdev = dev; adapter_handle = of_get_property(dev->node, "ibm,hea-handle", NULL); if (adapter_handle) adapter->handle = *adapter_handle; if (!adapter->handle) { dev_err(&dev->dev, "failed getting handle for adapter" " '%s'\n", dev->node->full_name); ret = -ENODEV; goto out_free_ad; } adapter->pd = EHEA_PD_ID; dev->dev.driver_data = adapter; /* initialize adapter and ports */ /* get adapter properties */ ret = ehea_sense_adapter_attr(adapter); if (ret) { dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret); goto out_free_ad; } adapter->neq = ehea_create_eq(adapter, EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1); if (!adapter->neq) { ret = -EIO; dev_err(&dev->dev, "NEQ creation failed\n"); goto out_free_ad; } tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet, (unsigned long)adapter); ret = ibmebus_request_irq(adapter->neq->attr.ist1, ehea_interrupt_neq, IRQF_DISABLED, "ehea_neq", adapter); if (ret) { dev_err(&dev->dev, "requesting NEQ IRQ failed\n"); goto out_kill_eq; } ret = ehea_create_device_sysfs(dev); if (ret) goto out_free_irq; ret = ehea_setup_ports(adapter); if (ret) { dev_err(&dev->dev, "setup_ports failed\n"); goto out_rem_dev_sysfs; } ret = 0; goto out; out_rem_dev_sysfs: ehea_remove_device_sysfs(dev); out_free_irq: ibmebus_free_irq(adapter->neq->attr.ist1, adapter); out_kill_eq: ehea_destroy_eq(adapter->neq); out_free_ad: kfree(adapter); out: ehea_update_firmware_handles(); mutex_unlock(&ehea_fw_handles.lock); return ret; } static int __devexit ehea_remove(struct of_device *dev) { struct ehea_adapter *adapter = dev->dev.driver_data; int i; for (i = 0; i < EHEA_MAX_PORTS; i++) if (adapter->port[i]) { ehea_shutdown_single_port(adapter->port[i]); adapter->port[i] = NULL; } ehea_remove_device_sysfs(dev); flush_scheduled_work(); mutex_lock(&ehea_fw_handles.lock); ibmebus_free_irq(adapter->neq->attr.ist1, adapter); tasklet_kill(&adapter->neq_tasklet); ehea_destroy_eq(adapter->neq); ehea_remove_adapter_mr(adapter); list_del(&adapter->list); kfree(adapter); ehea_update_firmware_handles(); mutex_unlock(&ehea_fw_handles.lock); return 0; } void ehea_crash_handler(void) { int i; if (ehea_fw_handles.arr) for (i = 0; i < ehea_fw_handles.num_entries; i++) ehea_h_free_resource(ehea_fw_handles.arr[i].adh, ehea_fw_handles.arr[i].fwh, FORCE_FREE); if (ehea_bcmc_regs.arr) for (i = 0; i < ehea_bcmc_regs.num_entries; i++) ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh, ehea_bcmc_regs.arr[i].port_id, ehea_bcmc_regs.arr[i].reg_type, ehea_bcmc_regs.arr[i].macaddr, 0, H_DEREG_BCMC); } static int ehea_mem_notifier(struct notifier_block *nb, unsigned long action, void *data) { struct memory_notify *arg = data; switch (action) { case MEM_CANCEL_OFFLINE: ehea_info("memory offlining canceled"); /* Readd canceled memory block */ case MEM_ONLINE: ehea_info("memory is going online"); if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages)) return NOTIFY_BAD; ehea_rereg_mrs(NULL); break; case MEM_GOING_OFFLINE: ehea_info("memory is going offline"); if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages)) return NOTIFY_BAD; ehea_rereg_mrs(NULL); break; default: break; } return NOTIFY_OK; } static struct notifier_block ehea_mem_nb = { .notifier_call = ehea_mem_notifier, }; static int ehea_reboot_notifier(struct notifier_block *nb, unsigned long action, void *unused) { if (action == SYS_RESTART) { ehea_info("Reboot: freeing all eHEA resources"); ibmebus_unregister_driver(&ehea_driver); } return NOTIFY_DONE; } static struct notifier_block ehea_reboot_nb = { .notifier_call = ehea_reboot_notifier, }; static int check_module_parm(void) { int ret = 0; if ((rq1_entries < EHEA_MIN_ENTRIES_QP) || (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) { ehea_info("Bad parameter: rq1_entries"); ret = -EINVAL; } if ((rq2_entries < EHEA_MIN_ENTRIES_QP) || (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) { ehea_info("Bad parameter: rq2_entries"); ret = -EINVAL; } if ((rq3_entries < EHEA_MIN_ENTRIES_QP) || (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) { ehea_info("Bad parameter: rq3_entries"); ret = -EINVAL; } if ((sq_entries < EHEA_MIN_ENTRIES_QP) || (sq_entries > EHEA_MAX_ENTRIES_SQ)) { ehea_info("Bad parameter: sq_entries"); ret = -EINVAL; } return ret; } static ssize_t ehea_show_capabilities(struct device_driver *drv, char *buf) { return sprintf(buf, "%d", EHEA_CAPABILITIES); } static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_capabilities, NULL); int __init ehea_module_init(void) { int ret; printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION); INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs); memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles)); memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs)); mutex_init(&ehea_fw_handles.lock); spin_lock_init(&ehea_bcmc_regs.lock); ret = check_module_parm(); if (ret) goto out; ret = ehea_create_busmap(); if (ret) goto out; ret = register_reboot_notifier(&ehea_reboot_nb); if (ret) ehea_info("failed registering reboot notifier"); ret = register_memory_notifier(&ehea_mem_nb); if (ret) ehea_info("failed registering memory remove notifier"); ret = crash_shutdown_register(&ehea_crash_handler); if (ret) ehea_info("failed registering crash handler"); ret = ibmebus_register_driver(&ehea_driver); if (ret) { ehea_error("failed registering eHEA device driver on ebus"); goto out2; } ret = driver_create_file(&ehea_driver.driver, &driver_attr_capabilities); if (ret) { ehea_error("failed to register capabilities attribute, ret=%d", ret); goto out3; } return ret; out3: ibmebus_unregister_driver(&ehea_driver); out2: unregister_memory_notifier(&ehea_mem_nb); unregister_reboot_notifier(&ehea_reboot_nb); crash_shutdown_unregister(&ehea_crash_handler); out: return ret; } static void __exit ehea_module_exit(void) { int ret; flush_scheduled_work(); driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities); ibmebus_unregister_driver(&ehea_driver); unregister_reboot_notifier(&ehea_reboot_nb); ret = crash_shutdown_unregister(&ehea_crash_handler); if (ret) ehea_info("failed unregistering crash handler"); unregister_memory_notifier(&ehea_mem_nb); kfree(ehea_fw_handles.arr); kfree(ehea_bcmc_regs.arr); ehea_destroy_busmap(); } module_init(ehea_module_init); module_exit(ehea_module_exit);