| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jan-Bernd Themann | 12401 | 72.04% | 23 | 13.53% |
| Thomas Klein | 2150 | 12.49% | 27 | 15.88% |
| Anton Blanchard | 820 | 4.76% | 10 | 5.88% |
| Joe Perches | 391 | 2.27% | 3 | 1.76% |
| Breno Leitão | 250 | 1.45% | 8 | 4.71% |
| brenohl@br.ibm.com | 199 | 1.16% | 1 | 0.59% |
| Andre Detsch | 174 | 1.01% | 1 | 0.59% |
| Stephen Hemminger | 141 | 0.82% | 2 | 1.18% |
| Thadeu Lima de Souza Cascardo | 129 | 0.75% | 5 | 2.94% |
| Jiri Pirko | 72 | 0.42% | 6 | 3.53% |
| Hannes Hering | 64 | 0.37% | 4 | 2.35% |
| Eric Dumazet | 56 | 0.33% | 8 | 4.71% |
| Grant C. Likely | 37 | 0.21% | 3 | 1.76% |
| Daniel Walker | 31 | 0.18% | 3 | 1.76% |
| Heinrich Schuchardt | 17 | 0.10% | 1 | 0.59% |
| Zhen Lei | 17 | 0.10% | 1 | 0.59% |
| Olaf Hering | 15 | 0.09% | 1 | 0.59% |
| David S. Miller | 15 | 0.09% | 3 | 1.76% |
| Arnaldo Carvalho de Melo | 14 | 0.08% | 4 | 2.35% |
| Patrick McHardy | 13 | 0.08% | 2 | 1.18% |
| Jarod Wilson | 13 | 0.08% | 1 | 0.59% |
| Greg Kroah-Hartman | 13 | 0.08% | 2 | 1.18% |
| Allen Pais | 13 | 0.08% | 1 | 0.59% |
| Michał Mirosław | 12 | 0.07% | 1 | 0.59% |
| Yang Yingliang | 10 | 0.06% | 1 | 0.59% |
| Himangi Saraogi | 9 | 0.05% | 1 | 0.59% |
| Brian King | 9 | 0.05% | 1 | 0.59% |
| Stephen Rothwell | 9 | 0.05% | 3 | 1.76% |
| Michael Ellerman | 8 | 0.05% | 1 | 0.59% |
| Yue haibing | 8 | 0.05% | 3 | 1.76% |
| Jakub Kiciński | 6 | 0.03% | 3 | 1.76% |
| Alexander Beregalov | 6 | 0.03% | 1 | 0.59% |
| Guilherme G. Piccoli | 5 | 0.03% | 1 | 0.59% |
| Wen Yang | 5 | 0.03% | 1 | 0.59% |
| Santiago Leon | 5 | 0.03% | 1 | 0.59% |
| Dave Young | 4 | 0.02% | 1 | 0.59% |
| David Howells | 4 | 0.02% | 1 | 0.59% |
| Joachim Fenkes | 4 | 0.02% | 1 | 0.59% |
| Masakazu Mokuno | 4 | 0.02% | 1 | 0.59% |
| Michael S. Tsirkin | 4 | 0.02% | 1 | 0.59% |
| Eric W. Biedermann | 3 | 0.02% | 1 | 0.59% |
| Christophe Leroy | 3 | 0.02% | 1 | 0.59% |
| Tony Prisk | 3 | 0.02% | 1 | 0.59% |
| Michael Opdenacker | 3 | 0.02% | 1 | 0.59% |
| Rob Herring | 3 | 0.02% | 2 | 1.18% |
| Uwe Kleine-König | 3 | 0.02% | 1 | 0.59% |
| Vlad Yasevich | 3 | 0.02% | 1 | 0.59% |
| Ben Hutchings | 3 | 0.02% | 2 | 1.18% |
| Gustavo A. R. Silva | 3 | 0.02% | 1 | 0.59% |
| Andi Kleen | 3 | 0.02% | 1 | 0.59% |
| Qiheng Lin | 3 | 0.02% | 1 | 0.59% |
| Domen Puncer | 3 | 0.02% | 1 | 0.59% |
| Tejun Heo | 2 | 0.01% | 2 | 1.18% |
| Fabian Frederick | 2 | 0.01% | 1 | 0.59% |
| Thomas Gleixner | 2 | 0.01% | 1 | 0.59% |
| Andrew Morton | 2 | 0.01% | 1 | 0.59% |
| Kay Sievers | 2 | 0.01% | 1 | 0.59% |
| Jingoo Han | 2 | 0.01% | 1 | 0.59% |
| Ian Campbell | 2 | 0.01% | 1 | 0.59% |
| Linus Torvalds (pre-git) | 2 | 0.01% | 1 | 0.59% |
| Linus Torvalds | 1 | 0.01% | 1 | 0.59% |
| Doug Maxey | 1 | 0.01% | 1 | 0.59% |
| Nicolas Kaiser | 1 | 0.01% | 1 | 0.59% |
| Ansuel Smith | 1 | 0.01% | 1 | 0.59% |
| Total | 17213 | 170 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * linux/drivers/net/ethernet/ibm/ehea/ehea_main.c * * eHEA ethernet device driver for IBM eServer System p * * (C) Copyright IBM Corp. 2006 * * Authors: * Christoph Raisch <raisch@de.ibm.com> * Jan-Bernd Themann <themann@de.ibm.com> * Thomas Klein <tklein@de.ibm.com> */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/device.h> #include <linux/in.h> #include <linux/ip.h> #include <linux/tcp.h> #include <linux/udp.h> #include <linux/if.h> #include <linux/list.h> #include <linux/slab.h> #include <linux/if_ether.h> #include <linux/notifier.h> #include <linux/reboot.h> #include <linux/memory.h> #include <asm/kexec.h> #include <linux/mutex.h> #include <linux/prefetch.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/platform_device.h> #include <net/ip.h> #include "ehea.h" #include "ehea_qmr.h" #include "ehea_phyp.h" MODULE_LICENSE("GPL"); MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>"); 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 = 1; 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_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 = [7..14]. Default = " __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")"); MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 " "[2^x - 1], x = [7..14]. Default = " __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")"); MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 " "[2^x - 1], x = [7..14]. Default = " __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")"); MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue " "[2^x - 1], x = [7..14]. Default = " __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")"); MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, " "Default = 1"); static int port_name_cnt; static LIST_HEAD(adapter_list); static unsigned long ehea_driver_flags; static DEFINE_MUTEX(dlpar_mem_lock); static struct ehea_fw_handle_array ehea_fw_handles; static struct ehea_bcmc_reg_array ehea_bcmc_regs; static int ehea_probe_adapter(struct platform_device *dev); static void ehea_remove(struct platform_device *dev); static const struct of_device_id ehea_module_device_table[] = { { .name = "lhea", .compatible = "IBM,lhea", }, { .type = "network", .compatible = "IBM,lhea-ethernet", }, {}, }; MODULE_DEVICE_TABLE(of, ehea_module_device_table); static const struct of_device_id ehea_device_table[] = { { .name = "lhea", .compatible = "IBM,lhea", }, {}, }; MODULE_DEVICE_TABLE(of, ehea_device_table); static struct platform_driver ehea_driver = { .driver = { .name = "ehea", .owner = THIS_MODULE, .of_match_table = ehea_device_table, }, .probe = ehea_probe_adapter, .remove_new = ehea_remove, }; void ehea_dump(void *adr, int len, char *msg) { int x; unsigned char *deb = adr; for (x = 0; x < len; x += 16) { pr_info("%s adr=%p ofs=%04x %016llx %016llx\n", msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8])); deb += 16; } } static 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 */ mutex_lock(&ehea_fw_handles.lock); 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; } } 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 = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL); if (!arr) goto out; /* Keep the existing array */ } else goto out_update; list_for_each_entry(adapter, &adapter_list, list) { if (num_adapters == 0) break; for (k = 0; k < EHEA_MAX_PORTS; k++) { struct ehea_port *port = adapter->port[k]; if (!port || (port->state != EHEA_PORT_UP) || (num_ports == 0)) continue; for (l = 0; l < port->num_def_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; num_ports--; } 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; } num_adapters--; } out_update: kfree(ehea_fw_handles.arr); ehea_fw_handles.arr = arr; ehea_fw_handles.num_entries = i; out: mutex_unlock(&ehea_fw_handles.lock); } static void ehea_update_bcmc_registrations(void) { unsigned long flags; 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; spin_lock_irqsave(&ehea_bcmc_regs.lock, flags); /* 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 = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC); if (!arr) goto out; /* 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; if (num_registrations == 0) goto out_update; 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; num_registrations -= 2; list_for_each_entry(mc_entry, &port->mc_list->list, list) { if (num_registrations == 0) goto out_update; arr[i].adh = adapter->handle; arr[i].port_id = port->logical_port_id; arr[i].reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED; if (mc_entry->macaddr == 0) arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL; 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_MULTICAST | EHEA_BCMC_VLANID_ALL; if (mc_entry->macaddr == 0) arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL; arr[i++].macaddr = mc_entry->macaddr; num_registrations -= 2; } } } out_update: kfree(ehea_bcmc_regs.arr); ehea_bcmc_regs.arr = arr; ehea_bcmc_regs.num_entries = i; out: spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags); } static void ehea_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) { struct ehea_port *port = netdev_priv(dev); u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0; int i; for (i = 0; i < port->num_def_qps; i++) { rx_packets += port->port_res[i].rx_packets; rx_bytes += port->port_res[i].rx_bytes; } for (i = 0; i < port->num_def_qps; i++) { tx_packets += port->port_res[i].tx_packets; tx_bytes += port->port_res[i].tx_bytes; } stats->tx_packets = tx_packets; stats->rx_bytes = rx_bytes; stats->tx_bytes = tx_bytes; stats->rx_packets = rx_packets; stats->multicast = port->stats.multicast; stats->rx_errors = port->stats.rx_errors; } static void ehea_update_stats(struct work_struct *work) { struct ehea_port *port = container_of(work, struct ehea_port, stats_work.work); struct net_device *dev = port->netdev; struct rtnl_link_stats64 *stats = &port->stats; struct hcp_ehea_port_cb2 *cb2; u64 hret; cb2 = (void *)get_zeroed_page(GFP_KERNEL); if (!cb2) { netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n"); goto resched; } 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) { netdev_err(dev, "query_ehea_port failed\n"); goto out_herr; } if (netif_msg_hw(port)) ehea_dump(cb2, sizeof(*cb2), "net_device_stats"); stats->multicast = cb2->rxmcp; stats->rx_errors = cb2->rxuerr; out_herr: free_page((unsigned long)cb2); resched: schedule_delayed_work(&port->stats_work, round_jiffies_relative(msecs_to_jiffies(1000))); } 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; break; } } index--; index &= max_index_mask; adder++; } if (adder == 0) return; /* Ring doorbell */ ehea_update_rq1a(pr->qp, adder); } static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a) { struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; struct net_device *dev = pr->port->netdev; int i; if (nr_rq1a > pr->rq1_skba.len) { netdev_err(dev, "NR_RQ1A bigger than skb array len\n"); return; } for (i = 0; i < nr_rq1a; i++) { skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE); if (!skb_arr_rq1[i]) break; } /* Ring doorbell */ ehea_update_rq1a(pr->qp, i - 1); } 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; skb = netdev_alloc_skb_ip_align(dev, packet_size); if (!skb) { q_skba->os_skbs = fill_wqes - i; if (q_skba->os_skbs == q_skba->len - 2) { netdev_info(pr->port->netdev, "rq%i ran dry - no mem for skb\n", rq_nr); ret = -ENOMEM; } break; } skb_arr[index] = skb; tmp_addr = ehea_map_vaddr(skb->data); if (tmp_addr == -1) { dev_consume_skb_any(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); } 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); } 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, struct ehea_port_res *pr) { int length = cqe->num_bytes_transfered - 4; /*remove CRC */ skb_put(skb, length); skb->protocol = eth_type_trans(skb, dev); /* The packet was not an IPV4 packet so a complemented checksum was calculated. The value is found in the Internet Checksum field. */ if (cqe->status & EHEA_CQE_BLIND_CKSUM) { skb->ip_summed = CHECKSUM_COMPLETE; skb->csum = csum_unfold(~cqe->inet_checksum_value); } else skb->ip_summed = CHECKSUM_UNNECESSARY; skb_record_rx_queue(skb, pr - &pr->port->port_res[0]); } 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]; if (pref) { 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]; if (pref) { 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)) { pr_err("Critical receive error for QP %d. Resetting port.\n", pr->qp->init_attr.qp_nr); ehea_dump(cqe, sizeof(*cqe), "CQE"); } ehea_schedule_port_reset(pr->port); return 1; } return 0; } 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; u64 processed_bytes = 0; 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)) { netif_info(port, rx_err, dev, "LL rq1: skb=NULL\n"); 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, pr); } else if (rq == 2) { /* RQ2 */ skb = get_skb_by_index(skb_arr_rq2, skb_arr_rq2_len, cqe); if (unlikely(!skb)) { netif_err(port, rx_err, dev, "rq2: skb=NULL\n"); break; } ehea_fill_skb(dev, skb, cqe, pr); processed_rq2++; } else { /* RQ3 */ skb = get_skb_by_index(skb_arr_rq3, skb_arr_rq3_len, cqe); if (unlikely(!skb)) { netif_err(port, rx_err, dev, "rq3: skb=NULL\n"); break; } ehea_fill_skb(dev, skb, cqe, pr); processed_rq3++; } processed_bytes += skb->len; if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), cqe->vlan_tag); napi_gro_receive(&pr->napi, 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); } pr->rx_packets += processed; pr->rx_bytes += processed_bytes; ehea_refill_rq1(pr, last_wqe_index, processed_rq1); ehea_refill_rq2(pr, processed_rq2); ehea_refill_rq3(pr, processed_rq3); return processed; } #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull static void reset_sq_restart_flag(struct ehea_port *port) { int i; for (i = 0; i < port->num_def_qps; i++) { struct ehea_port_res *pr = &port->port_res[i]; pr->sq_restart_flag = 0; } wake_up(&port->restart_wq); } static void check_sqs(struct ehea_port *port) { struct ehea_swqe *swqe; int swqe_index; int i; for (i = 0; i < port->num_def_qps; i++) { struct ehea_port_res *pr = &port->port_res[i]; int ret; swqe = ehea_get_swqe(pr->qp, &swqe_index); memset(swqe, 0, SWQE_HEADER_SIZE); atomic_dec(&pr->swqe_avail); swqe->tx_control |= EHEA_SWQE_PURGE; swqe->wr_id = SWQE_RESTART_CHECK; swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT; swqe->immediate_data_length = 80; ehea_post_swqe(pr->qp, swqe); ret = wait_event_timeout(port->restart_wq, pr->sq_restart_flag == 0, msecs_to_jiffies(100)); if (!ret) { pr_err("HW/SW queues out of sync\n"); ehea_schedule_port_reset(pr->port); return; } } } 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; struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev, pr - &pr->port->port_res[0]); cqe = ehea_poll_cq(send_cq); while (cqe && (quota > 0)) { ehea_inc_cq(send_cq); cqe_counter++; rmb(); if (cqe->wr_id == SWQE_RESTART_CHECK) { pr->sq_restart_flag = 1; swqe_av++; break; } if (cqe->status & EHEA_CQE_STAT_ERR_MASK) { pr_err("Bad send completion status=0x%04X\n", cqe->status); if (netif_msg_tx_err(pr->port)) ehea_dump(cqe, sizeof(*cqe), "Send CQE"); if (cqe->status & EHEA_CQE_STAT_RESET_MASK) { pr_err("Resetting port\n"); 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_consume_skb_any(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); if (unlikely(netif_tx_queue_stopped(txq) && (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) { __netif_tx_lock(txq, smp_processor_id()); if (netif_tx_queue_stopped(txq) && (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th)) netif_tx_wake_queue(txq); __netif_tx_unlock(txq); } wake_up(&pr->port->swqe_avail_wq); return cqe; } #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 wqe_index; int rx = 0; cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); rx += ehea_proc_rwqes(dev, pr, budget - rx); while (rx != budget) { napi_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); rmb(); cqe = ehea_poll_rq1(pr->qp, &wqe_index); cqe_skb = ehea_poll_cq(pr->send_cq); if (!cqe && !cqe_skb) return rx; if (!napi_schedule(napi)) return rx; cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); rx += ehea_proc_rwqes(dev, pr, budget - rx); } return rx; } static irqreturn_t ehea_recv_irq_handler(int irq, void *param) { struct ehea_port_res *pr = param; napi_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; u64 resource_type, aer, aerr; int reset_port = 0; eqe = ehea_poll_eq(port->qp_eq); while (eqe) { qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry); pr_err("QP aff_err: entry=0x%llx, token=0x%x\n", eqe->entry, qp_token); qp = port->port_res[qp_token].qp; resource_type = ehea_error_data(port->adapter, qp->fw_handle, &aer, &aerr); if (resource_type == EHEA_AER_RESTYPE_QP) { if ((aer & EHEA_AER_RESET_MASK) || (aerr & EHEA_AERR_RESET_MASK)) reset_port = 1; } else reset_port = 1; /* Reset in case of CQ or EQ error */ eqe = ehea_poll_eq(port->qp_eq); } if (reset_port) { pr_err("Resetting port\n"); 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 = (void *)get_zeroed_page(GFP_ATOMIC); if (!cb0) { pr_err("no mem for cb0\n"); 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; } ret = 0; out_free: if (ret || netif_msg_probe(port)) ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr"); free_page((unsigned long)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 = (void *)get_zeroed_page(GFP_KERNEL); if (!cb4) { pr_err("no mem for cb4\n"); 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 { pr_err("Failed sensing port speed\n"); ret = -EIO; } } else { if (hret == H_AUTHORITY) { pr_info("Hypervisor denied setting port speed\n"); ret = -EPERM; } else { ret = -EIO; pr_err("Failed setting port speed\n"); } } if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP)) netif_carrier_on(port->netdev); free_page((unsigned long)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; struct net_device *dev; ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe); portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe); port = ehea_get_port(adapter, portnum); if (!port) { netdev_err(NULL, "unknown portnum %x\n", portnum); return; } dev = port->netdev; switch (ec) { case EHEA_EC_PORTSTATE_CHG: /* port state change */ if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) { if (!netif_carrier_ok(dev)) { ret = ehea_sense_port_attr(port); if (ret) { netdev_err(dev, "failed resensing port attributes\n"); break; } netif_info(port, link, dev, "Logical port up: %dMbps %s Duplex\n", port->port_speed, port->full_duplex == 1 ? "Full" : "Half"); netif_carrier_on(dev); netif_wake_queue(dev); } } else if (netif_carrier_ok(dev)) { netif_info(port, link, dev, "Logical port down\n"); netif_carrier_off(dev); netif_tx_disable(dev); } if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) { port->phy_link = EHEA_PHY_LINK_UP; netif_info(port, link, dev, "Physical port up\n"); if (prop_carrier_state) netif_carrier_on(dev); } else { port->phy_link = EHEA_PHY_LINK_DOWN; netif_info(port, link, dev, "Physical port down\n"); if (prop_carrier_state) netif_carrier_off(dev); } if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe)) netdev_info(dev, "External switch port is primary port\n"); else netdev_info(dev, "External switch port is backup port\n"); break; case EHEA_EC_ADAPTER_MALFUNC: netdev_err(dev, "Adapter malfunction\n"); break; case EHEA_EC_PORT_MALFUNC: netdev_info(dev, "Port malfunction\n"); netif_carrier_off(dev); netif_tx_disable(dev); break; default: netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe); break; } } static void ehea_neq_tasklet(struct tasklet_struct *t) { struct ehea_adapter *adapter = from_tasklet(adapter, t, neq_tasklet); struct ehea_eqe *eqe; u64 event_mask; eqe = ehea_poll_eq(adapter->neq); pr_debug("eqe=%p\n", eqe); while (eqe) { pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry); ehea_parse_eqe(adapter, eqe->entry); eqe = ehea_poll_eq(adapter->neq); pr_debug("next eqe=%p\n", 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; ehea_init_fill_rq1(pr, pr->rq1_skba.len); 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, 0, port->int_aff_name, port); if (ret) { netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n", port->qp_eq->attr.ist1); goto out_free_qpeq; } netif_info(port, ifup, dev, "irq_handle 0x%X for function qp_aff_irq_handler registered\n", port->qp_eq->attr.ist1); for (i = 0; i < port->num_def_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, 0, pr->int_send_name, pr); if (ret) { netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n", i, pr->eq->attr.ist1); goto out_free_req; } netif_info(port, ifup, dev, "irq_handle 0x%X for function ehea_queue_int %d registered\n", 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; i++) { pr = &port->port_res[i]; ibmebus_free_irq(pr->eq->attr.ist1, pr); netif_info(port, intr, dev, "free send irq for res %d with handle 0x%X\n", i, pr->eq->attr.ist1); } /* associated events */ ibmebus_free_irq(port->qp_eq->attr.ist1, port); netif_info(port, intr, dev, "associated event interrupt for handle 0x%X freed\n", 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 = (void *)get_zeroed_page(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: free_page((unsigned long)cb0); out: return ret; } static 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: pr_err("Generating SMRS failed\n"); return -EIO; } static 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 = vzalloc(arr_size); if (!q_skba->arr) return -ENOMEM; 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; u64 tx_bytes, rx_bytes, tx_packets, rx_packets; tx_bytes = pr->tx_bytes; tx_packets = pr->tx_packets; rx_bytes = pr->rx_bytes; rx_packets = pr->rx_packets; memset(pr, 0, sizeof(struct ehea_port_res)); pr->tx_bytes = tx_bytes; pr->tx_packets = tx_packets; pr->rx_bytes = rx_bytes; pr->rx_packets = rx_packets; pr->port = port; pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0); if (!pr->eq) { pr_err("create_eq failed (eq)\n"); 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) { pr_err("create_cq failed (cq_recv)\n"); 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) { pr_err("create_cq failed (cq_send)\n"); goto out_free; } if (netif_msg_ifup(port)) pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n", 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; pr_err("no mem for ehea_qp_init_attr\n"); 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) { pr_err("create_qp failed\n"); ret = -EIO; goto out_free; } if (netif_msg_ifup(port)) pr_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\n", 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); 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; if (pr->qp) netif_napi_del(&pr->napi); 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++) dev_kfree_skb(pr->rq1_skba.arr[i]); for (i = 0; i < pr->rq2_skba.len; i++) dev_kfree_skb(pr->rq2_skba.arr[i]); for (i = 0; i < pr->rq3_skba.len; i++) dev_kfree_skb(pr->rq3_skba.arr[i]); for (i = 0; i < pr->sq_skba.len; 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; } static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe, u32 lkey) { int skb_data_size = skb_headlen(skb); u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0]; struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry; unsigned int immediate_len = SWQE2_MAX_IMM; swqe->descriptors = 0; if (skb_is_gso(skb)) { swqe->tx_control |= EHEA_SWQE_TSO; swqe->mss = skb_shinfo(skb)->gso_size; /* * For TSO packets we only copy the headers into the * immediate area. */ immediate_len = skb_tcp_all_headers(skb); } if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) { skb_copy_from_linear_data(skb, imm_data, immediate_len); swqe->immediate_data_length = immediate_len; if (skb_data_size > immediate_len) { sg1entry->l_key = lkey; sg1entry->len = skb_data_size - immediate_len; sg1entry->vaddr = ehea_map_vaddr(skb->data + immediate_len); 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; sg1entry_contains_frag_data = 0; write_swqe2_immediate(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 = skb_frag_size(frag); sg1entry->vaddr = ehea_map_vaddr(skb_frag_address(frag)); 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 = skb_frag_size(frag); sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag)); 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) { pr_err("%sregistering bc address failed (tagged)\n", 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) { pr_err("%sregistering bc address failed (vlan)\n", 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 = (void *)get_zeroed_page(GFP_KERNEL); if (!cb0) { pr_err("no mem for cb0\n"); 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; } eth_hw_addr_set(dev, mac_addr->sa_data); /* 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(); out_free: free_page((unsigned long)cb0); out: return ret; } static void ehea_promiscuous_error(u64 hret, int enable) { if (hret == H_AUTHORITY) pr_info("Hypervisor denied %sabling promiscuous mode\n", enable == 1 ? "en" : "dis"); else pr_err("failed %sabling promiscuous mode\n", 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) return; cb7 = (void *)get_zeroed_page(GFP_ATOMIC); if (!cb7) { pr_err("no mem for cb7\n"); 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: free_page((unsigned long)cb7); } 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_MULTICAST | EHEA_BCMC_UNTAGGED; if (mc_mac_addr == 0) reg_type |= EHEA_BCMC_SCOPE_ALL; 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_MULTICAST | EHEA_BCMC_VLANID_ALL; if (mc_mac_addr == 0) reg_type |= EHEA_BCMC_SCOPE_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) { pr_err("failed deregistering mcast MAC\n"); 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 netdev_err(dev, "failed enabling IFF_ALLMULTI\n"); } } else { if (!enable) { /* Disable ALLMULTI */ hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC); if (!hret) port->allmulti = 0; else netdev_err(dev, "failed disabling IFF_ALLMULTI\n"); } } } 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) 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 { pr_err("failed registering mcast MAC\n"); kfree(ehea_mcl_entry); } } static void ehea_set_multicast_list(struct net_device *dev) { struct ehea_port *port = netdev_priv(dev); struct netdev_hw_addr *ha; int ret; ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC)); if (dev->flags & IFF_ALLMULTI) { ehea_allmulti(dev, 1); goto out; } ehea_allmulti(dev, 0); if (!netdev_mc_empty(dev)) { 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 (netdev_mc_count(dev) > port->adapter->max_mc_mac) { pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n", port->adapter->max_mc_mac); goto out; } netdev_for_each_mc_addr(ha, dev) ehea_add_multicast_entry(port, ha->addr); } out: ehea_update_bcmc_registrations(); } static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe) { swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC; if (vlan_get_protocol(skb) != htons(ETH_P_IP)) return; if (skb->ip_summed == CHECKSUM_PARTIAL) swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM; swqe->ip_start = skb_network_offset(skb); swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1; switch (ip_hdr(skb)->protocol) { case IPPROTO_UDP: if (skb->ip_summed == CHECKSUM_PARTIAL) swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; swqe->tcp_offset = swqe->ip_end + 1 + offsetof(struct udphdr, check); break; case IPPROTO_TCP: if (skb->ip_summed == CHECKSUM_PARTIAL) swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; swqe->tcp_offset = swqe->ip_end + 1 + offsetof(struct tcphdr, check); break; } } static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev, struct ehea_swqe *swqe, u32 lkey) { swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT; xmit_common(skb, swqe); write_swqe2_data(skb, dev, swqe, lkey); } static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev, struct ehea_swqe *swqe) { u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0]; xmit_common(skb, swqe); if (!skb->data_len) skb_copy_from_linear_data(skb, imm_data, skb->len); else skb_copy_bits(skb, 0, imm_data, skb->len); swqe->immediate_data_length = skb->len; dev_consume_skb_any(skb); } static netdev_tx_t ehea_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct ehea_port *port = netdev_priv(dev); struct ehea_swqe *swqe; u32 lkey; int swqe_index; struct ehea_port_res *pr; struct netdev_queue *txq; pr = &port->port_res[skb_get_queue_mapping(skb)]; txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); swqe = ehea_get_swqe(pr->qp, &swqe_index); memset(swqe, 0, SWQE_HEADER_SIZE); atomic_dec(&pr->swqe_avail); if (skb_vlan_tag_present(skb)) { swqe->tx_control |= EHEA_SWQE_VLAN_INSERT; swqe->vlan_tag = skb_vlan_tag_get(skb); } pr->tx_packets++; pr->tx_bytes += skb->len; 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; netif_info(port, tx_queued, dev, "post swqe on QP %d\n", pr->qp->init_attr.qp_nr); if (netif_msg_tx_queued(port)) ehea_dump(swqe, 512, "swqe"); if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { netif_tx_stop_queue(txq); swqe->tx_control |= EHEA_SWQE_PURGE; } ehea_post_swqe(pr->qp, swqe); if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) { pr->p_stats.queue_stopped++; netif_tx_stop_queue(txq); } return NETDEV_TX_OK; } static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) { struct ehea_port *port = netdev_priv(dev); struct ehea_adapter *adapter = port->adapter; struct hcp_ehea_port_cb1 *cb1; int index; u64 hret; int err = 0; cb1 = (void *)get_zeroed_page(GFP_KERNEL); if (!cb1) { pr_err("no mem for cb1\n"); err = -ENOMEM; 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) { pr_err("query_ehea_port failed\n"); err = -EINVAL; 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) { pr_err("modify_ehea_port failed\n"); err = -EINVAL; } out: free_page((unsigned long)cb1); return err; } static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) { struct ehea_port *port = netdev_priv(dev); struct ehea_adapter *adapter = port->adapter; struct hcp_ehea_port_cb1 *cb1; int index; u64 hret; int err = 0; cb1 = (void *)get_zeroed_page(GFP_KERNEL); if (!cb1) { pr_err("no mem for cb1\n"); err = -ENOMEM; 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) { pr_err("query_ehea_port failed\n"); err = -EINVAL; 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) { pr_err("modify_ehea_port failed\n"); err = -EINVAL; } out: free_page((unsigned long)cb1); return err; } static 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 = (void *)get_zeroed_page(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) { pr_err("query_ehea_qp failed (1)\n"); 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) { pr_err("modify_ehea_qp failed (1)\n"); 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) { pr_err("query_ehea_qp failed (2)\n"); 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) { pr_err("modify_ehea_qp failed (2)\n"); 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) { pr_err("query_ehea_qp failed (3)\n"); 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) { pr_err("modify_ehea_qp failed (3)\n"); 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) { pr_err("query_ehea_qp failed (4)\n"); goto out; } ret = 0; out: free_page((unsigned long)cb0); return ret; } static int ehea_port_res_setup(struct ehea_port *port, int def_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; pr_err("ehea_create_eq failed (qp_eq)\n"); 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; 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; 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; ret = ehea_port_res_setup(port, port->num_def_qps); if (ret) { netdev_err(dev, "port_res_failed\n"); goto out; } /* Set default QP for this port */ ret = ehea_configure_port(port); if (ret) { netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret); goto out_clean_pr; } ret = ehea_reg_interrupts(dev); if (ret) { netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret); goto out_clean_pr; } for (i = 0; i < port->num_def_qps; i++) { ret = ehea_activate_qp(port->adapter, port->port_res[i].qp); if (ret) { netdev_err(dev, "activate_qp failed\n"); goto out_free_irqs; } } for (i = 0; i < port->num_def_qps; i++) { ret = ehea_fill_port_res(&port->port_res[i]); if (ret) { netdev_err(dev, "out_free_irqs\n"); goto out_free_irqs; } } 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) netdev_info(dev, "Failed starting. ret=%i\n", ret); ehea_update_bcmc_registrations(); ehea_update_firmware_handles(); return ret; } static void port_napi_disable(struct ehea_port *port) { int i; for (i = 0; i < port->num_def_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; 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); netif_info(port, ifup, dev, "enabling port\n"); netif_carrier_off(dev); ret = ehea_up(dev); if (!ret) { port_napi_enable(port); netif_tx_start_all_queues(dev); } mutex_unlock(&port->port_lock); schedule_delayed_work(&port->stats_work, round_jiffies_relative(msecs_to_jiffies(1000))); 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; ehea_drop_multicast_list(dev); ehea_allmulti(dev, 0); ehea_broadcast_reg_helper(port, H_DEREG_BCMC); ehea_free_interrupts(dev); port->state = EHEA_PORT_DOWN; ehea_update_bcmc_registrations(); ret = ehea_clean_all_portres(port); if (ret) netdev_info(dev, "Failed freeing resources. ret=%i\n", ret); ehea_update_firmware_handles(); return ret; } static int ehea_stop(struct net_device *dev) { int ret; struct ehea_port *port = netdev_priv(dev); netif_info(port, ifdown, dev, "disabling port\n"); set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); cancel_work_sync(&port->reset_task); cancel_delayed_work_sync(&port->stats_work); mutex_lock(&port->port_lock); netif_tx_stop_all_queues(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; i++) { struct ehea_port_res *pr = &port->port_res[i]; int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count; int ret; ret = wait_event_timeout(port->swqe_avail_wq, atomic_read(&pr->swqe_avail) >= swqe_max, msecs_to_jiffies(100)); if (!ret) { pr_err("WARNING: sq not flushed completely\n"); break; } } } static 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 = (void *)get_zeroed_page(GFP_KERNEL); if (!cb0) { ret = -ENOMEM; goto out; } for (i = 0; i < (port->num_def_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) { pr_err("query_ehea_qp failed (1)\n"); 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) { pr_err("modify_ehea_qp failed (1)\n"); 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) { pr_err("query_ehea_qp failed (2)\n"); goto out; } /* deregister shared memory regions */ dret = ehea_rem_smrs(pr); if (dret) { pr_err("unreg shared memory region failed\n"); goto out; } } ret = 0; out: free_page((unsigned long)cb0); return ret; } static 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); } } static 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 = (void *)get_zeroed_page(GFP_KERNEL); if (!cb0) return -ENOMEM; for (i = 0; i < (port->num_def_qps); i++) { struct ehea_port_res *pr = &port->port_res[i]; struct ehea_qp *qp = pr->qp; ret = ehea_gen_smrs(pr); if (ret) { netdev_err(dev, "creation of shared memory regions failed\n"); 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) { netdev_err(dev, "query_ehea_qp failed (1)\n"); ret = -EFAULT; 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) { netdev_err(dev, "modify_ehea_qp failed (1)\n"); ret = -EFAULT; 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) { netdev_err(dev, "query_ehea_qp failed (2)\n"); ret = -EFAULT; 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: free_page((unsigned long)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; mutex_lock(&dlpar_mem_lock); port->resets++; mutex_lock(&port->port_lock); netif_tx_disable(dev); port_napi_disable(port); ehea_down(dev); ret = ehea_up(dev); if (ret) goto out; ehea_set_multicast_list(dev); netif_info(port, timer, dev, "reset successful\n"); port_napi_enable(port); netif_tx_wake_all_queues(dev); out: mutex_unlock(&port->port_lock); mutex_unlock(&dlpar_mem_lock); } static void ehea_rereg_mrs(void) { int ret, i; struct ehea_adapter *adapter; pr_info("LPAR memory changed - re-initializing driver\n"); 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_tx_disable(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); } reset_sq_restart_flag(port); } /* Unregister old memory region */ ret = ehea_rem_mr(&adapter->mr); if (ret) { pr_err("unregister MR failed - driver inoperable!\n"); 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) { pr_err("register MR failed - driver inoperable!\n"); 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); ret = ehea_restart_qps(dev); if (!ret) { check_sqs(port); port_napi_enable(port); netif_tx_wake_all_queues(dev); } else { netdev_err(dev, "Unable to restart QPS\n"); } mutex_unlock(&port->port_lock); } } } } pr_info("re-initializing driver complete\n"); out: return; } static void ehea_tx_watchdog(struct net_device *dev, unsigned int txqueue) { 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); } static int ehea_sense_adapter_attr(struct ehea_adapter *adapter) { struct hcp_query_ehea *cb; u64 hret; int ret; cb = (void *)get_zeroed_page(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: free_page((unsigned long)cb); out: return ret; } static 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 = (void *)get_zeroed_page(GFP_KERNEL); if (!cb4) { pr_err("no mem for cb4\n"); 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; free_page((unsigned long)cb4); } out: return ret; } static ssize_t log_port_id_show(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_RO(log_port_id); static void logical_port_release(struct device *dev) { struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); of_node_put(port->ofdev.dev.of_node); } static struct device *ehea_register_port(struct ehea_port *port, struct device_node *dn) { int ret; port->ofdev.dev.of_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) { pr_err("failed to register device. ret=%d\n", ret); put_device(&port->ofdev.dev); goto out; } ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id); if (ret) { pr_err("failed to register attributes, ret=%d\n", 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); } static const struct net_device_ops ehea_netdev_ops = { .ndo_open = ehea_open, .ndo_stop = ehea_stop, .ndo_start_xmit = ehea_start_xmit, .ndo_get_stats64 = ehea_get_stats64, .ndo_set_mac_address = ehea_set_mac_addr, .ndo_validate_addr = eth_validate_addr, .ndo_set_rx_mode = ehea_set_multicast_list, .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid, .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid, .ndo_tx_timeout = ehea_tx_watchdog, }; static 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_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES); if (!dev) { 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; netif_set_real_num_rx_queues(dev, port->num_def_qps); netif_set_real_num_tx_queues(dev, port->num_def_qps); 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 */ eth_hw_addr_set(dev, (u8 *)&port->mac_addr); dev->netdev_ops = &ehea_netdev_ops; ehea_set_ethtool_ops(dev); dev->hw_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX; dev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM; dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM; dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT; /* MTU range: 68 - 9022 */ dev->min_mtu = ETH_MIN_MTU; dev->max_mtu = EHEA_MAX_PACKET_SIZE; INIT_WORK(&port->reset_task, ehea_reset_port); INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats); init_waitqueue_head(&port->swqe_avail_wq); init_waitqueue_head(&port->restart_wq); ret = register_netdev(dev); if (ret) { pr_err("register_netdev failed. ret=%d\n", ret); goto out_unreg_port; } ret = ehea_get_jumboframe_status(port, &jumbo); if (ret) netdev_err(dev, "failed determining jumbo frame status\n"); netdev_info(dev, "Jumbo frames are %sabled\n", 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: pr_err("setting up logical port with id=%d failed, ret=%d\n", logical_port_id, ret); return NULL; } static void ehea_shutdown_single_port(struct ehea_port *port) { struct ehea_adapter *adapter = port->adapter; cancel_work_sync(&port->reset_task); cancel_delayed_work_sync(&port->stats_work); 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->dev.of_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) { pr_err("bad device node: eth_dn name=%pOF\n", eth_dn); continue; } if (ehea_add_adapter_mr(adapter)) { pr_err("creating MR failed\n"); 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]) netdev_info(adapter->port[i]->netdev, "logical port id #%d\n", *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->dev.of_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 probe_port_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct ehea_adapter *adapter = dev_get_drvdata(dev); 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) { netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n", logical_port_id); return -EINVAL; } eth_dn = ehea_get_eth_dn(adapter, logical_port_id); if (!eth_dn) { pr_info("no logical port with id %d found\n", logical_port_id); return -EINVAL; } if (ehea_add_adapter_mr(adapter)) { pr_err("creating MR failed\n"); of_node_put(eth_dn); 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; } netdev_info(port->netdev, "added: (logical port id=%d)\n", logical_port_id); } else { ehea_remove_adapter_mr(adapter); return -EIO; } return (ssize_t) count; } static ssize_t remove_port_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct ehea_adapter *adapter = dev_get_drvdata(dev); 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) { netdev_info(port->netdev, "removed: (logical port id=%d)\n", 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 { pr_err("removing port with logical port id=%d failed. port not configured.\n", logical_port_id); return -EINVAL; } ehea_remove_adapter_mr(adapter); return (ssize_t) count; } static DEVICE_ATTR_WO(probe_port); static DEVICE_ATTR_WO(remove_port); static int ehea_create_device_sysfs(struct platform_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; } static void ehea_remove_device_sysfs(struct platform_device *dev) { device_remove_file(&dev->dev, &dev_attr_probe_port); device_remove_file(&dev->dev, &dev_attr_remove_port); } static int ehea_reboot_notifier(struct notifier_block *nb, unsigned long action, void *unused) { if (action == SYS_RESTART) { pr_info("Reboot: freeing all eHEA resources\n"); ibmebus_unregister_driver(&ehea_driver); } return NOTIFY_DONE; } static struct notifier_block ehea_reboot_nb = { .notifier_call = ehea_reboot_notifier, }; static int ehea_mem_notifier(struct notifier_block *nb, unsigned long action, void *data) { int ret = NOTIFY_BAD; struct memory_notify *arg = data; mutex_lock(&dlpar_mem_lock); switch (action) { case MEM_CANCEL_OFFLINE: pr_info("memory offlining canceled"); fallthrough; /* re-add canceled memory block */ case MEM_ONLINE: pr_info("memory is going online"); set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages)) goto out_unlock; ehea_rereg_mrs(); break; case MEM_GOING_OFFLINE: pr_info("memory is going offline"); set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages)) goto out_unlock; ehea_rereg_mrs(); break; default: break; } ehea_update_firmware_handles(); ret = NOTIFY_OK; out_unlock: mutex_unlock(&dlpar_mem_lock); return ret; } static struct notifier_block ehea_mem_nb = { .notifier_call = ehea_mem_notifier, }; static 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 atomic_t ehea_memory_hooks_registered; /* Register memory hooks on probe of first adapter */ static int ehea_register_memory_hooks(void) { int ret = 0; if (atomic_inc_return(&ehea_memory_hooks_registered) > 1) return 0; ret = ehea_create_busmap(); if (ret) { pr_info("ehea_create_busmap failed\n"); goto out; } ret = register_reboot_notifier(&ehea_reboot_nb); if (ret) { pr_info("register_reboot_notifier failed\n"); goto out; } ret = register_memory_notifier(&ehea_mem_nb); if (ret) { pr_info("register_memory_notifier failed\n"); goto out2; } ret = crash_shutdown_register(ehea_crash_handler); if (ret) { pr_info("crash_shutdown_register failed\n"); goto out3; } return 0; out3: unregister_memory_notifier(&ehea_mem_nb); out2: unregister_reboot_notifier(&ehea_reboot_nb); out: atomic_dec(&ehea_memory_hooks_registered); return ret; } static void ehea_unregister_memory_hooks(void) { /* Only remove the hooks if we've registered them */ if (atomic_read(&ehea_memory_hooks_registered) == 0) return; unregister_reboot_notifier(&ehea_reboot_nb); if (crash_shutdown_unregister(ehea_crash_handler)) pr_info("failed unregistering crash handler\n"); unregister_memory_notifier(&ehea_mem_nb); } static int ehea_probe_adapter(struct platform_device *dev) { struct ehea_adapter *adapter; const u64 *adapter_handle; int ret; int i; ret = ehea_register_memory_hooks(); if (ret) return ret; if (!dev || !dev->dev.of_node) { pr_err("Invalid ibmebus device probed\n"); return -EINVAL; } adapter = devm_kzalloc(&dev->dev, 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->dev.of_node, "ibm,hea-handle", NULL); if (adapter_handle) adapter->handle = *adapter_handle; if (!adapter->handle) { dev_err(&dev->dev, "failed getting handle for adapter" " '%pOF'\n", dev->dev.of_node); ret = -ENODEV; goto out_free_ad; } adapter->pd = EHEA_PD_ID; platform_set_drvdata(dev, 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_setup(&adapter->neq_tasklet, ehea_neq_tasklet); ret = ehea_create_device_sysfs(dev); if (ret) goto out_kill_eq; ret = ehea_setup_ports(adapter); if (ret) { dev_err(&dev->dev, "setup_ports failed\n"); goto out_rem_dev_sysfs; } ret = ibmebus_request_irq(adapter->neq->attr.ist1, ehea_interrupt_neq, 0, "ehea_neq", adapter); if (ret) { dev_err(&dev->dev, "requesting NEQ IRQ failed\n"); goto out_shutdown_ports; } /* Handle any events that might be pending. */ tasklet_hi_schedule(&adapter->neq_tasklet); ret = 0; goto out; out_shutdown_ports: for (i = 0; i < EHEA_MAX_PORTS; i++) if (adapter->port[i]) { ehea_shutdown_single_port(adapter->port[i]); adapter->port[i] = NULL; } out_rem_dev_sysfs: ehea_remove_device_sysfs(dev); out_kill_eq: ehea_destroy_eq(adapter->neq); out_free_ad: list_del(&adapter->list); out: ehea_update_firmware_handles(); return ret; } static void ehea_remove(struct platform_device *dev) { struct ehea_adapter *adapter = platform_get_drvdata(dev); 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); 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); ehea_update_firmware_handles(); } static int check_module_parm(void) { int ret = 0; if ((rq1_entries < EHEA_MIN_ENTRIES_QP) || (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) { pr_info("Bad parameter: rq1_entries\n"); ret = -EINVAL; } if ((rq2_entries < EHEA_MIN_ENTRIES_QP) || (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) { pr_info("Bad parameter: rq2_entries\n"); ret = -EINVAL; } if ((rq3_entries < EHEA_MIN_ENTRIES_QP) || (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) { pr_info("Bad parameter: rq3_entries\n"); ret = -EINVAL; } if ((sq_entries < EHEA_MIN_ENTRIES_QP) || (sq_entries > EHEA_MAX_ENTRIES_SQ)) { pr_info("Bad parameter: sq_entries\n"); ret = -EINVAL; } return ret; } static ssize_t capabilities_show(struct device_driver *drv, char *buf) { return sprintf(buf, "%d", EHEA_CAPABILITIES); } static DRIVER_ATTR_RO(capabilities); static int __init ehea_module_init(void) { int ret; pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION); 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 = ibmebus_register_driver(&ehea_driver); if (ret) { pr_err("failed registering eHEA device driver on ebus\n"); goto out; } ret = driver_create_file(&ehea_driver.driver, &driver_attr_capabilities); if (ret) { pr_err("failed to register capabilities attribute, ret=%d\n", ret); goto out2; } return ret; out2: ibmebus_unregister_driver(&ehea_driver); out: return ret; } static void __exit ehea_module_exit(void) { driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities); ibmebus_unregister_driver(&ehea_driver); ehea_unregister_memory_hooks(); kfree(ehea_fw_handles.arr); kfree(ehea_bcmc_regs.arr); ehea_destroy_busmap(); } module_init(ehea_module_init); module_exit(ehea_module_exit);
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