From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/net/ethernet/ibm/ehea/ehea_main.c | 3620 ++++++++++++++++++++++ 1 file changed, 3620 insertions(+) create mode 100644 kernel/drivers/net/ethernet/ibm/ehea/ehea_main.c (limited to 'kernel/drivers/net/ethernet/ibm/ehea/ehea_main.c') diff --git a/kernel/drivers/net/ethernet/ibm/ehea/ehea_main.c b/kernel/drivers/net/ethernet/ibm/ehea/ehea_main.c new file mode 100644 index 000000000..2a0dc127d --- /dev/null +++ b/kernel/drivers/net/ethernet/ibm/ehea/ehea_main.c @@ -0,0 +1,3620 @@ +/* + * 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 + * 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. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#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 = 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 int 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", + }, + {}, +}; + +static struct platform_driver ehea_driver = { + .driver = { + .name = "ehea", + .owner = THIS_MODULE, + .of_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) { + 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 struct rtnl_link_stats64 *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; + return stats; +} + +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, k; + + for (i = 0; i < port->num_def_qps; i++) { + struct ehea_port_res *pr = &port->port_res[i]; + int ret; + k = 0; + 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_reschedule(napi)) + return rx; + + cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); + rx += ehea_proc_rwqes(dev, pr, budget - rx); + } + + 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++) + napi_schedule(&port->port_res[i].napi); +} +#endif + +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); + dev = port->netdev; + + switch (ec) { + case EHEA_EC_PORTSTATE_CHG: /* port state change */ + + if (!port) { + netdev_err(dev, "unknown portnum %x\n", portnum); + break; + } + + 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(unsigned long data) +{ + struct ehea_adapter *adapter = (struct ehea_adapter *)data; + 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 = rx_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, 64); + + 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++) + 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; +} + +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 = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(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; + } + + memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len); + + /* 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 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 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 int 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"); + + 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) { + 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; + + 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"); + 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"); + 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"); + 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) +{ + 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 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 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); + 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, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = ehea_netpoll, +#endif + .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_change_mtu = ehea_change_mtu, + .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 */ + memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN); + + 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; + + 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); + + memset(&port->stats, 0, sizeof(struct net_device_stats)); + 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=%s\n", + eth_dn->full_name); + 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 ehea_probe_port(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"); + 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 ehea_remove_port(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(probe_port, S_IWUSR, NULL, ehea_probe_port); +static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_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"); + /* Fall through: 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" + " '%s'\n", dev->dev.of_node->full_name); + 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_init(&adapter->neq_tasklet, ehea_neq_tasklet, + (unsigned long)adapter); + + 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 int 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(); + + return 0; +} + +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 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); + +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); -- cgit 1.2.3-korg