diff options
Diffstat (limited to 'drivers/net/ehea/ehea_main.c')
| -rw-r--r-- | drivers/net/ehea/ehea_main.c | 2654 |
1 files changed, 2654 insertions, 0 deletions
diff --git a/drivers/net/ehea/ehea_main.c b/drivers/net/ehea/ehea_main.c new file mode 100644 index 00000000000..263d1c5b3f2 --- /dev/null +++ b/drivers/net/ehea/ehea_main.c @@ -0,0 +1,2654 @@ +/* + * linux/drivers/net/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> + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <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/if_ether.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; + +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_PARM_DESC(msg_level, "msg_level"); +MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 " + "[2^x - 1], x = [6..14]. Default = " + __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")"); +MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 " + "[2^x - 1], x = [6..14]. Default = " + __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")"); +MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 " + "[2^x - 1], x = [6..14]. Default = " + __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")"); +MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue " + "[2^x - 1], x = [6..14]. Default = " + __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")"); + +void ehea_dump(void *adr, int len, char *msg) { + int x; + unsigned char *deb = adr; + for (x = 0; x < len; x += 16) { + printk(DRV_NAME "%s adr=%p ofs=%04x %016lx %016lx\n", msg, + deb, x, *((u64*)&deb[0]), *((u64*)&deb[8])); + deb += 16; + } +} + +static struct net_device_stats *ehea_get_stats(struct net_device *dev) +{ + struct ehea_port *port = netdev_priv(dev); + struct net_device_stats *stats = &port->stats; + struct hcp_ehea_port_cb2 *cb2; + u64 hret, rx_packets; + int i; + + memset(stats, 0, sizeof(*stats)); + + cb2 = kzalloc(H_CB_ALIGNMENT, GFP_KERNEL); + if (!cb2) { + ehea_error("no mem for cb2"); + goto out; + } + + hret = ehea_h_query_ehea_port(port->adapter->handle, + port->logical_port_id, + H_PORT_CB2, H_PORT_CB2_ALL, cb2); + if (hret != H_SUCCESS) { + ehea_error("query_ehea_port failed"); + goto out_herr; + } + + if (netif_msg_hw(port)) + ehea_dump(cb2, sizeof(*cb2), "net_device_stats"); + + rx_packets = 0; + for (i = 0; i < port->num_def_qps; i++) + rx_packets += port->port_res[i].rx_packets; + + stats->tx_packets = cb2->txucp + cb2->txmcp + cb2->txbcp; + stats->multicast = cb2->rxmcp; + stats->rx_errors = cb2->rxuerr; + stats->rx_bytes = cb2->rxo; + stats->tx_bytes = cb2->txo; + stats->rx_packets = rx_packets; + +out_herr: + kfree(cb2); +out: + return stats; +} + +static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes) +{ + struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; + struct net_device *dev = pr->port->netdev; + int max_index_mask = pr->rq1_skba.len - 1; + int i; + + if (!nr_of_wqes) + return; + + for (i = 0; i < nr_of_wqes; i++) { + if (!skb_arr_rq1[index]) { + skb_arr_rq1[index] = netdev_alloc_skb(dev, + EHEA_L_PKT_SIZE); + if (!skb_arr_rq1[index]) { + ehea_error("%s: no mem for skb/%d wqes filled", + dev->name, i); + break; + } + } + index--; + index &= max_index_mask; + } + /* Ring doorbell */ + ehea_update_rq1a(pr->qp, i); +} + +static int ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a) +{ + int ret = 0; + struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; + struct net_device *dev = pr->port->netdev; + int i; + + for (i = 0; i < pr->rq1_skba.len; i++) { + skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE); + if (!skb_arr_rq1[i]) { + ehea_error("%s: no mem for skb/%d wqes filled", + dev->name, i); + ret = -ENOMEM; + goto out; + } + } + /* Ring doorbell */ + ehea_update_rq1a(pr->qp, nr_rq1a); +out: + return ret; +} + +static int ehea_refill_rq_def(struct ehea_port_res *pr, + struct ehea_q_skb_arr *q_skba, int rq_nr, + int num_wqes, int wqe_type, int packet_size) +{ + struct net_device *dev = pr->port->netdev; + struct ehea_qp *qp = pr->qp; + struct sk_buff **skb_arr = q_skba->arr; + struct ehea_rwqe *rwqe; + int i, index, max_index_mask, fill_wqes; + int ret = 0; + + fill_wqes = q_skba->os_skbs + num_wqes; + + if (!fill_wqes) + return ret; + + index = q_skba->index; + max_index_mask = q_skba->len - 1; + for (i = 0; i < fill_wqes; i++) { + struct sk_buff *skb = netdev_alloc_skb(dev, packet_size); + if (!skb) { + ehea_error("%s: no mem for skb/%d wqes filled", + dev->name, i); + q_skba->os_skbs = fill_wqes - i; + ret = -ENOMEM; + break; + } + skb_reserve(skb, NET_IP_ALIGN); + + skb_arr[index] = skb; + + 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 = (u64)skb->data; + rwqe->sg_list[0].len = packet_size; + rwqe->data_segments = 1; + + index++; + index &= max_index_mask; + } + q_skba->index = index; + + /* Ring doorbell */ + iosync(); + if (rq_nr == 2) + ehea_update_rq2a(pr->qp, i); + else + ehea_update_rq3a(pr->qp, i); + + return ret; +} + + +static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes) +{ + return ehea_refill_rq_def(pr, &pr->rq2_skba, 2, + nr_of_wqes, EHEA_RWQE2_TYPE, + EHEA_RQ2_PKT_SIZE + NET_IP_ALIGN); +} + + +static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes) +{ + return ehea_refill_rq_def(pr, &pr->rq3_skba, 3, + nr_of_wqes, EHEA_RWQE3_TYPE, + EHEA_MAX_PACKET_SIZE + NET_IP_ALIGN); +} + +static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num) +{ + *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5; + if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0) + return 0; + if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) && + (cqe->header_length == 0)) + return 0; + return -EINVAL; +} + +static inline void ehea_fill_skb(struct net_device *dev, + struct sk_buff *skb, struct ehea_cqe *cqe) +{ + int length = cqe->num_bytes_transfered - 4; /*remove CRC */ + + skb_put(skb, length); + skb->ip_summed = CHECKSUM_UNNECESSARY; + skb->protocol = eth_type_trans(skb, dev); +} + +static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array, + int arr_len, + struct ehea_cqe *cqe) +{ + int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); + struct sk_buff *skb; + void *pref; + int x; + + x = skb_index + 1; + x &= (arr_len - 1); + + pref = skb_array[x]; + prefetchw(pref); + prefetchw(pref + EHEA_CACHE_LINE); + + pref = (skb_array[x]->data); + prefetch(pref); + prefetch(pref + EHEA_CACHE_LINE); + prefetch(pref + EHEA_CACHE_LINE * 2); + prefetch(pref + EHEA_CACHE_LINE * 3); + skb = skb_array[skb_index]; + skb_array[skb_index] = NULL; + return skb; +} + +static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array, + int arr_len, int wqe_index) +{ + struct sk_buff *skb; + void *pref; + int x; + + x = wqe_index + 1; + x &= (arr_len - 1); + + pref = skb_array[x]; + prefetchw(pref); + prefetchw(pref + EHEA_CACHE_LINE); + + pref = (skb_array[x]->data); + prefetchw(pref); + prefetchw(pref + EHEA_CACHE_LINE); + + skb = skb_array[wqe_index]; + skb_array[wqe_index] = NULL; + return skb; +} + +static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq, + struct ehea_cqe *cqe, int *processed_rq2, + int *processed_rq3) +{ + struct sk_buff *skb; + + if (netif_msg_rx_err(pr->port)) { + ehea_error("CQE Error for QP %d", pr->qp->init_attr.qp_nr); + ehea_dump(cqe, sizeof(*cqe), "CQE"); + } + + 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) { + ehea_error("Critical receive error. Resetting port."); + queue_work(pr->port->adapter->ehea_wq, &pr->port->reset_task); + return 1; + } + + return 0; +} + +static int ehea_poll(struct net_device *dev, int *budget) +{ + struct ehea_port *port = netdev_priv(dev); + struct ehea_port_res *pr = &port->port_res[0]; + struct ehea_qp *qp = pr->qp; + struct ehea_cqe *cqe; + struct sk_buff *skb; + struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; + struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr; + struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr; + int skb_arr_rq1_len = pr->rq1_skba.len; + int skb_arr_rq2_len = pr->rq2_skba.len; + int skb_arr_rq3_len = pr->rq3_skba.len; + int processed, processed_rq1, processed_rq2, processed_rq3; + int wqe_index, last_wqe_index, rq, intreq, my_quota, port_reset; + + processed = processed_rq1 = processed_rq2 = processed_rq3 = 0; + last_wqe_index = 0; + my_quota = min(*budget, dev->quota); + my_quota = min(my_quota, EHEA_POLL_MAX_RWQE); + + /* rq0 is low latency RQ */ + cqe = ehea_poll_rq1(qp, &wqe_index); + while ((my_quota > 0) && cqe) { + ehea_inc_rq1(qp); + processed_rq1++; + processed++; + my_quota--; + if (netif_msg_rx_status(port)) + ehea_dump(cqe, sizeof(*cqe), "CQE"); + + last_wqe_index = wqe_index; + rmb(); + if (!ehea_check_cqe(cqe, &rq)) { + if (rq == 1) { /* LL RQ1 */ + skb = get_skb_by_index_ll(skb_arr_rq1, + skb_arr_rq1_len, + wqe_index); + if (unlikely(!skb)) { + if (netif_msg_rx_err(port)) + ehea_error("LL rq1: skb=NULL"); + skb = netdev_alloc_skb(dev, + EHEA_L_PKT_SIZE); + if (!skb) + break; + } + memcpy(skb->data, ((char*)cqe) + 64, + cqe->num_bytes_transfered - 4); + ehea_fill_skb(dev, skb, cqe); + } else if (rq == 2) { /* RQ2 */ + skb = get_skb_by_index(skb_arr_rq2, + skb_arr_rq2_len, cqe); + if (unlikely(!skb)) { + if (netif_msg_rx_err(port)) + ehea_error("rq2: skb=NULL"); + break; + } + ehea_fill_skb(dev, skb, cqe); + processed_rq2++; + } else { /* RQ3 */ + skb = get_skb_by_index(skb_arr_rq3, + skb_arr_rq3_len, cqe); + if (unlikely(!skb)) { + if (netif_msg_rx_err(port)) + ehea_error("rq3: skb=NULL"); + break; + } + ehea_fill_skb(dev, skb, cqe); + processed_rq3++; + } + + if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) + vlan_hwaccel_receive_skb(skb, port->vgrp, + cqe->vlan_tag); + else + netif_receive_skb(skb); + + } else { /* Error occured */ + pr->p_state.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); + } + + dev->quota -= processed; + *budget -= processed; + + pr->p_state.ehea_poll += 1; + pr->rx_packets += processed; + + ehea_refill_rq1(pr, last_wqe_index, processed_rq1); + ehea_refill_rq2(pr, processed_rq2); + ehea_refill_rq3(pr, processed_rq3); + + intreq = ((pr->p_state.ehea_poll & 0xF) == 0xF); + + if (!cqe || intreq) { + netif_rx_complete(dev); + ehea_reset_cq_ep(pr->recv_cq); + ehea_reset_cq_n1(pr->recv_cq); + cqe = hw_qeit_get_valid(&qp->hw_rqueue1); + if (!cqe || intreq) + return 0; + if (!netif_rx_reschedule(dev, my_quota)) + return 0; + } + return 1; +} + +void free_sent_skbs(struct ehea_cqe *cqe, struct ehea_port_res *pr) +{ + struct sk_buff *skb; + int index, max_index_mask, i; + + index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); + max_index_mask = pr->sq_skba.len - 1; + for (i = 0; i < EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id); i++) { + skb = pr->sq_skba.arr[index]; + if (likely(skb)) { + dev_kfree_skb(skb); + pr->sq_skba.arr[index] = NULL; + } else { + ehea_error("skb=NULL, wr_id=%lX, loop=%d, index=%d", + cqe->wr_id, i, index); + } + index--; + index &= max_index_mask; + } +} + +#define MAX_SENDCOMP_QUOTA 400 +void ehea_send_irq_tasklet(unsigned long data) +{ + struct ehea_port_res *pr = (struct ehea_port_res*)data; + struct ehea_cq *send_cq = pr->send_cq; + struct ehea_cqe *cqe; + int quota = MAX_SENDCOMP_QUOTA; + int cqe_counter = 0; + int swqe_av = 0; + unsigned long flags; + + do { + cqe = ehea_poll_cq(send_cq); + if (!cqe) { + ehea_reset_cq_ep(send_cq); + ehea_reset_cq_n1(send_cq); + cqe = ehea_poll_cq(send_cq); + if (!cqe) + break; + } + cqe_counter++; + rmb(); + if (cqe->status & EHEA_CQE_STAT_ERR_MASK) { + ehea_error("Send Completion Error: Resetting port"); + if (netif_msg_tx_err(pr->port)) + ehea_dump(cqe, sizeof(*cqe), "Send CQE"); + queue_work(pr->port->adapter->ehea_wq, + &pr->port->reset_task); + 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)) + free_sent_skbs(cqe, pr); + + swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id); + quota--; + } while (quota > 0); + + ehea_update_feca(send_cq, cqe_counter); + atomic_add(swqe_av, &pr->swqe_avail); + + spin_lock_irqsave(&pr->netif_queue, flags); + if (pr->queue_stopped && (atomic_read(&pr->swqe_avail) + >= pr->swqe_refill_th)) { + netif_wake_queue(pr->port->netdev); + pr->queue_stopped = 0; + } + spin_unlock_irqrestore(&pr->netif_queue, flags); + + if (unlikely(cqe)) + tasklet_hi_schedule(&pr->send_comp_task); +} + +static irqreturn_t ehea_send_irq_handler(int irq, void *param, + struct pt_regs *regs) +{ + struct ehea_port_res *pr = param; + tasklet_hi_schedule(&pr->send_comp_task); + return IRQ_HANDLED; +} + +static irqreturn_t ehea_recv_irq_handler(int irq, void *param, + struct pt_regs *regs) +{ + struct ehea_port_res *pr = param; + struct ehea_port *port = pr->port; + netif_rx_schedule(port->netdev); + return IRQ_HANDLED; +} + +static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param, + struct pt_regs *regs) +{ + struct ehea_port *port = param; + struct ehea_eqe *eqe; + u32 qp_token; + + eqe = ehea_poll_eq(port->qp_eq); + ehea_debug("eqe=%p", eqe); + while (eqe) { + ehea_debug("*eqe=%lx", *(u64*)eqe); + eqe = ehea_poll_eq(port->qp_eq); + qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry); + ehea_debug("next eqe=%p", eqe); + } + + return IRQ_HANDLED; +} + +static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter, + int logical_port) +{ + int i; + + for (i = 0; i < adapter->num_ports; 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; + + cb0 = kzalloc(H_CB_ALIGNMENT, GFP_KERNEL); + if (!cb0) { + ehea_error("no mem for cb0"); + ret = -ENOMEM; + goto out; + } + + hret = ehea_h_query_ehea_port(port->adapter->handle, + port->logical_port_id, H_PORT_CB0, + EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF), + cb0); + if (hret != H_SUCCESS) { + ret = -EIO; + goto out_free; + } + + /* MAC address */ + port->mac_addr = cb0->port_mac_addr << 16; + + if (!is_valid_ether_addr((u8*)&port->mac_addr)) { + ret = -EADDRNOTAVAIL; + goto out_free; + } + + /* Port speed */ + switch (cb0->port_speed) { + case H_SPEED_10M_H: + port->port_speed = EHEA_SPEED_10M; + port->full_duplex = 0; + break; + case H_SPEED_10M_F: + port->port_speed = EHEA_SPEED_10M; + port->full_duplex = 1; + break; + case H_SPEED_100M_H: + port->port_speed = EHEA_SPEED_100M; + port->full_duplex = 0; + break; + case H_SPEED_100M_F: + port->port_speed = EHEA_SPEED_100M; + port->full_duplex = 1; + break; + case H_SPEED_1G_F: + port->port_speed = EHEA_SPEED_1G; + port->full_duplex = 1; + break; + case H_SPEED_10G_F: + port->port_speed = EHEA_SPEED_10G; + port->full_duplex = 1; + break; + default: + port->port_speed = 0; + port->full_duplex = 0; + break; + } + + /* Number of default QPs */ + port->num_def_qps = cb0->num_default_qps; + + if (!port->num_def_qps) { + ret = -EINVAL; + goto out_free; + } + + if (port->num_def_qps >= EHEA_NUM_TX_QP) + port->num_add_tx_qps = 0; + else + port->num_add_tx_qps = EHEA_NUM_TX_QP - port->num_def_qps; + + ret = 0; +out_free: + if (ret || netif_msg_probe(port)) + ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr"); + kfree(cb0); +out: + return ret; +} + +int ehea_set_portspeed(struct ehea_port *port, u32 port_speed) +{ + struct hcp_ehea_port_cb4 *cb4; + u64 hret; + int ret = 0; + + cb4 = kzalloc(H_CB_ALIGNMENT, GFP_KERNEL); + if (!cb4) { + ehea_error("no mem for cb4"); + ret = -ENOMEM; + goto out; + } + + cb4->port_speed = port_speed; + + netif_carrier_off(port->netdev); + + hret = ehea_h_modify_ehea_port(port->adapter->handle, + port->logical_port_id, + H_PORT_CB4, H_PORT_CB4_SPEED, cb4); + if (hret == H_SUCCESS) { + port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0; + + hret = ehea_h_query_ehea_port(port->adapter->handle, + port->logical_port_id, + H_PORT_CB4, H_PORT_CB4_SPEED, + cb4); + if (hret == H_SUCCESS) { + switch (cb4->port_speed) { + case H_SPEED_10M_H: + port->port_speed = EHEA_SPEED_10M; + port->full_duplex = 0; + break; + case H_SPEED_10M_F: + port->port_speed = EHEA_SPEED_10M; + port->full_duplex = 1; + break; + case H_SPEED_100M_H: + port->port_speed = EHEA_SPEED_100M; + port->full_duplex = 0; + break; + case H_SPEED_100M_F: + port->port_speed = EHEA_SPEED_100M; + port->full_duplex = 1; + break; + case H_SPEED_1G_F: + port->port_speed = EHEA_SPEED_1G; + port->full_duplex = 1; + break; + case H_SPEED_10G_F: + port->port_speed = EHEA_SPEED_10G; + port->full_duplex = 1; + break; + default: + port->port_speed = 0; + port->full_duplex = 0; + break; + } + } else { + ehea_error("Failed sensing port speed"); + ret = -EIO; + } + } else { + if (hret == H_AUTHORITY) { + ehea_info("Hypervisor denied setting port speed. Either" + " this partition is not authorized to set " + "port speed or another partition has modified" + " port speed first."); + ret = -EPERM; + } else { + ret = -EIO; + ehea_error("Failed setting port speed"); + } + } + netif_carrier_on(port->netdev); + kfree(cb4); +out: + return ret; +} + +static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe) +{ + int ret; + u8 ec; + u8 portnum; + struct ehea_port *port; + + ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe); + portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe); + port = ehea_get_port(adapter, portnum); + + switch (ec) { + case EHEA_EC_PORTSTATE_CHG: /* port state change */ + + if (!port) { + ehea_error("unknown portnum %x", portnum); + break; + } + + if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) { + if (!netif_carrier_ok(port->netdev)) { + ret = ehea_sense_port_attr( + adapter->port[portnum]); + if (ret) { + ehea_error("failed resensing port " + "attributes"); + break; + } + + if (netif_msg_link(port)) + ehea_info("%s: Logical port up: %dMbps " + "%s Duplex", + port->netdev->name, + port->port_speed, + port->full_duplex == + 1 ? "Full" : "Half"); + + netif_carrier_on(port->netdev); + netif_wake_queue(port->netdev); + } + } else + if (netif_carrier_ok(port->netdev)) { + if (netif_msg_link(port)) + ehea_info("%s: Logical port down", + port->netdev->name); + netif_carrier_off(port->netdev); + netif_stop_queue(port->netdev); + } + + if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) { + if (netif_msg_link(port)) + ehea_info("%s: Physical port up", + port->netdev->name); + } else { + if (netif_msg_link(port)) + ehea_info("%s: Physical port down", + port->netdev->name); + } + + if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe)) + ehea_info("External switch port is primary port"); + else + ehea_info("External switch port is backup port"); + + break; + case EHEA_EC_ADAPTER_MALFUNC: + ehea_error("Adapter malfunction"); + break; + case EHEA_EC_PORT_MALFUNC: + ehea_info("Port malfunction: Device: %s", port->netdev->name); + netif_carrier_off(port->netdev); + netif_stop_queue(port->netdev); + break; + default: + ehea_error("unknown event code %x", ec); + break; + } +} + +static void ehea_neq_tasklet(unsigned long data) +{ + struct ehea_adapter *adapter = (struct ehea_adapter*)data; + struct ehea_eqe *eqe; + u64 event_mask; + + eqe = ehea_poll_eq(adapter->neq); + ehea_debug("eqe=%p", eqe); + + while (eqe) { + ehea_debug("*eqe=%lx", eqe->entry); + ehea_parse_eqe(adapter, eqe->entry); + eqe = ehea_poll_eq(adapter->neq); + ehea_debug("next eqe=%p", eqe); + } + + event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1) + | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1) + | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1); + + ehea_h_reset_events(adapter->handle, + adapter->neq->fw_handle, event_mask); +} + +static irqreturn_t ehea_interrupt_neq(int irq, void *param, + struct pt_regs *regs) +{ + struct ehea_adapter *adapter = param; + tasklet_hi_schedule(&adapter->neq_tasklet); + return IRQ_HANDLED; +} + + +static int ehea_fill_port_res(struct ehea_port_res *pr) +{ + int ret; + struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr; + + ret = ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1 + - init_attr->act_nr_rwqes_rq2 + - init_attr->act_nr_rwqes_rq3 - 1); + + ret |= ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1); + + ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1); + + return ret; +} + +static int ehea_reg_interrupts(struct net_device *dev) +{ + struct ehea_port *port = netdev_priv(dev); + struct ehea_port_res *pr; + int i, ret; + + for (i = 0; i < port->num_def_qps; i++) { + pr = &port->port_res[i]; + snprintf(pr->int_recv_name, EHEA_IRQ_NAME_SIZE - 1 + , "%s-recv%d", dev->name, i); + ret = ibmebus_request_irq(NULL, pr->recv_eq->attr.ist1, + ehea_recv_irq_handler, + SA_INTERRUPT, pr->int_recv_name, pr); + if (ret) { + ehea_error("failed registering irq for ehea_recv_int:" + "port_res_nr:%d, ist=%X", i, + pr->recv_eq->attr.ist1); + goto out_free_seq; + } + if (netif_msg_ifup(port)) + ehea_info("irq_handle 0x%X for funct ehea_recv_int %d " + "registered", pr->recv_eq->attr.ist1, i); + } + + snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff", + dev->name); + + ret = ibmebus_request_irq(NULL, port->qp_eq->attr.ist1, + ehea_qp_aff_irq_handler, + SA_INTERRUPT, port->int_aff_name, port); + if (ret) { + ehea_error("failed registering irq for qp_aff_irq_handler:" + "ist=%X", port->qp_eq->attr.ist1); + goto out_free_qpeq; + } + + if (netif_msg_ifup(port)) + ehea_info("irq_handle 0x%X for function qp_aff_irq_handler " + "registered", port->qp_eq->attr.ist1); + + for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) { + pr = &port->port_res[i]; + snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1, + "%s-send%d", dev->name, i); + ret = ibmebus_request_irq(NULL, pr->send_eq->attr.ist1, + ehea_send_irq_handler, + SA_INTERRUPT, pr->int_send_name, + pr); + if (ret) { + ehea_error("failed registering irq for ehea_send " + "port_res_nr:%d, ist=%X", i, + pr->send_eq->attr.ist1); + goto out_free_req; + } + if (netif_msg_ifup(port)) + ehea_info("irq_handle 0x%X for function ehea_send_int " + "%d registered", pr->send_eq->attr.ist1, i); + } +out: + return ret; + +out_free_req: + while (--i >= 0) { + u32 ist = port->port_res[i].send_eq->attr.ist1; + ibmebus_free_irq(NULL, ist, &port->port_res[i]); + } +out_free_qpeq: + ibmebus_free_irq(NULL, port->qp_eq->attr.ist1, port); + i = port->num_def_qps; +out_free_seq: + while (--i >= 0) { + u32 ist = port->port_res[i].recv_eq->attr.ist1; + ibmebus_free_irq(NULL, ist, &port->port_res[i]); + } + goto out; +} + +static void ehea_free_interrupts(struct net_device *dev) +{ + struct ehea_port *port = netdev_priv(dev); + struct ehea_port_res *pr; + int i; + + /* send */ + for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) { + pr = &port->port_res[i]; + ibmebus_free_irq(NULL, pr->send_eq->attr.ist1, pr); + if (netif_msg_intr(port)) + ehea_info("free send irq for res %d with handle 0x%X", + i, pr->send_eq->attr.ist1); + } + + /* receive */ + for (i = 0; i < port->num_def_qps; i++) { + pr = &port->port_res[i]; + ibmebus_free_irq(NULL, pr->recv_eq->attr.ist1, pr); + if (netif_msg_intr(port)) + ehea_info("free recv irq for res %d with handle 0x%X", + i, pr->recv_eq->attr.ist1); + } + + /* associated events */ + ibmebus_free_irq(NULL, port->qp_eq->attr.ist1, port); + if (netif_msg_intr(port)) + ehea_info("associated event interrupt for handle 0x%X freed", + port->qp_eq->attr.ist1); +} + +static int ehea_configure_port(struct ehea_port *port) +{ + int ret, i; + u64 hret, mask; + struct hcp_ehea_port_cb0 *cb0; + + ret = -ENOMEM; + cb0 = kzalloc(H_CB_ALIGNMENT, 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_def_qps; i++) + cb0->default_qpn_arr[i] = port->port_res[i].qp->init_attr.qp_nr; + + if (netif_msg_ifup(port)) + ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port"); + + mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1) + | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1); + + hret = ehea_h_modify_ehea_port(port->adapter->handle, + port->logical_port_id, + H_PORT_CB0, mask, cb0); + ret = -EIO; + if (hret != H_SUCCESS) + goto out_free; + + ret = 0; + +out_free: + kfree(cb0); +out: + return ret; +} + +static int ehea_gen_smrs(struct ehea_port_res *pr) +{ + u64 hret; + struct ehea_adapter *adapter = pr->port->adapter; + + hret = ehea_h_register_smr(adapter->handle, adapter->mr.handle, + adapter->mr.vaddr, EHEA_MR_ACC_CTRL, + adapter->pd, &pr->send_mr); + if (hret != H_SUCCESS) + goto out; + + hret = ehea_h_register_smr(adapter->handle, adapter->mr.handle, + adapter->mr.vaddr, EHEA_MR_ACC_CTRL, + adapter->pd, &pr->recv_mr); + if (hret != H_SUCCESS) + goto out_freeres; + + return 0; + +out_freeres: + hret = ehea_h_free_resource(adapter->handle, pr->send_mr.handle); + if (hret != H_SUCCESS) + ehea_error("failed freeing SMR"); +out: + return -EIO; +} + +static int ehea_rem_smrs(struct ehea_port_res *pr) +{ + struct ehea_adapter *adapter = pr->port->adapter; + int ret = 0; + u64 hret; + + hret = ehea_h_free_resource(adapter->handle, pr->send_mr.handle); + if (hret != H_SUCCESS) { + ret = -EIO; + ehea_error("failed freeing send SMR for pr=%p", pr); + } + + hret = ehea_h_free_resource(adapter->handle, pr->recv_mr.handle); + if (hret != H_SUCCESS) { + ret = -EIO; + ehea_error("failed freeing recv SMR for pr=%p", pr); + } + + return ret; +} + +static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries) +{ + int arr_size = sizeof(void*) * max_q_entries; + + q_skba->arr = vmalloc(arr_size); + if (!q_skba->arr) + return -ENOMEM; + + memset(q_skba->arr, 0, arr_size); + + q_skba->len = max_q_entries; + q_skba->index = 0; + q_skba->os_skbs = 0; + + return 0; +} + +static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr, + struct port_res_cfg *pr_cfg, int queue_token) +{ + struct ehea_adapter *adapter = port->adapter; + enum ehea_eq_type eq_type = EHEA_EQ; + struct ehea_qp_init_attr *init_attr = NULL; + int ret = -EIO; + + memset(pr, 0, sizeof(struct ehea_port_res)); + + pr->port = port; + spin_lock_init(&pr->send_lock); + spin_lock_init(&pr->recv_lock); + spin_lock_init(&pr->xmit_lock); + spin_lock_init(&pr->netif_queue); + + pr->recv_eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0); + if (!pr->recv_eq) { + ehea_error("create_eq failed (recv_eq)"); + goto out_free; + } + + pr->send_eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0); + if (!pr->send_eq) { + ehea_error("create_eq failed (send_eq)"); + goto out_free; + } + + pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq, + pr->recv_eq->fw_handle, + port->logical_port_id); + if (!pr->recv_cq) { + ehea_error("create_cq failed (cq_recv)"); + goto out_free; + } + + pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq, + pr->send_eq->fw_handle, + port->logical_port_id); + if (!pr->send_cq) { + ehea_error("create_cq failed (cq_send)"); + goto out_free; + } + + if (netif_msg_ifup(port)) + ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d", + pr->send_cq->attr.act_nr_of_cqes, + pr->recv_cq->attr.act_nr_of_cqes); + + init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL); + if (!init_attr) { + ret = -ENOMEM; + ehea_error("no mem for ehea_qp_init_attr"); + goto out_free; + } + + init_attr->low_lat_rq1 = 1; + init_attr->signalingtype = 1; /* generate CQE if specified in WQE */ + init_attr->rq_count = 3; + init_attr->qp_token = queue_token; + init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq; + init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1; + init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2; + init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3; + init_attr->wqe_size_enc_sq = EHEA_SG_SQ; + init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1; + init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2; + init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3; + init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD; + init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD; + init_attr->port_nr = port->logical_port_id; + init_attr->send_cq_handle = pr->send_cq->fw_handle; + init_attr->recv_cq_handle = pr->recv_cq->fw_handle; + init_attr->aff_eq_handle = port->qp_eq->fw_handle; + + pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr); + if (!pr->qp) { + ehea_error("create_qp failed"); + ret = -EIO; + goto out_free; + } + + if (netif_msg_ifup(port)) + ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n " + "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr, + init_attr->act_nr_send_wqes, + init_attr->act_nr_rwqes_rq1, + init_attr->act_nr_rwqes_rq2, + init_attr->act_nr_rwqes_rq3); + + ret = ehea_init_q_skba(&pr->sq_skba, init_attr->act_nr_send_wqes + 1); + 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; + } + tasklet_init(&pr->send_comp_task, ehea_send_irq_tasklet, + (unsigned long)pr); + atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1); + + kfree(init_attr); + 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->send_eq); + ehea_destroy_eq(pr->recv_eq); +out: + return ret; +} + +static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr) +{ + int ret, i; + + ret = ehea_destroy_qp(pr->qp); + + if (!ret) { + ehea_destroy_cq(pr->send_cq); + ehea_destroy_cq(pr->recv_cq); + ehea_destroy_eq(pr->send_eq); + ehea_destroy_eq(pr->recv_eq); + + for (i = 0; i < pr->rq1_skba.len; i++) + if (pr->rq1_skba.arr[i]) + dev_kfree_skb(pr->rq1_skba.arr[i]); + + for (i = 0; i < pr->rq2_skba.len; i++) + if (pr->rq2_skba.arr[i]) + dev_kfree_skb(pr->rq2_skba.arr[i]); + + for (i = 0; i < pr->rq3_skba.len; i++) + if (pr->rq3_skba.arr[i]) + dev_kfree_skb(pr->rq3_skba.arr[i]); + + for (i = 0; i < pr->sq_skba.len; i++) + if (pr->sq_skba.arr[i]) + dev_kfree_skb(pr->sq_skba.arr[i]); + + vfree(pr->rq1_skba.arr); + vfree(pr->rq2_skba.arr); + vfree(pr->rq3_skba.arr); + vfree(pr->sq_skba.arr); + ret = ehea_rem_smrs(pr); + } + return ret; +} + +/* + * The write_* functions store information in swqe which is used by + * the hardware to calculate the ip/tcp/udp checksum + */ + +static inline void write_ip_start_end(struct ehea_swqe *swqe, + const struct sk_buff *skb) +{ + swqe->ip_start = (u8)(((u64)skb->nh.iph) - ((u64)skb->data)); + swqe->ip_end = (u8)(swqe->ip_start + skb->nh.iph->ihl * 4 - 1); +} + +static inline void write_tcp_offset_end(struct ehea_swqe *swqe, + const struct sk_buff *skb) +{ + swqe->tcp_offset = + (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check)); + + swqe->tcp_end = (u16)skb->len - 1; +} + +static inline void write_udp_offset_end(struct ehea_swqe *swqe, + const struct sk_buff *skb) +{ + swqe->tcp_offset = + (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check)); + + swqe->tcp_end = (u16)skb->len - 1; +} + + +static void write_swqe2_TSO(struct sk_buff *skb, + struct ehea_swqe *swqe, u32 lkey) +{ + struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry; + u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0]; + int skb_data_size = skb->len - skb->data_len; + int headersize; + u64 tmp_addr; + + /* Packet is TCP with TSO enabled */ + swqe->tx_control |= EHEA_SWQE_TSO; + swqe->mss = skb_shinfo(skb)->gso_size; + /* copy only eth/ip/tcp headers to immediate data and + * the rest of skb->data to sg1entry + */ + headersize = ETH_HLEN + (skb->nh.iph->ihl * 4) + (skb->h.th->doff * 4); + + skb_data_size = skb->len - skb->data_len; + + if (skb_data_size >= headersize) { + /* copy immediate data */ + memcpy(imm_data, skb->data, headersize); + swqe->immediate_data_length = headersize; + + if (skb_data_size > headersize) { + /* set sg1entry data */ + sg1entry->l_key = lkey; + sg1entry->len = skb_data_size - headersize; + + tmp_addr = (u64)(skb->data + headersize); + sg1entry->vaddr = tmp_addr; + swqe->descriptors++; + } + } else + ehea_error("cannot handle fragmented headers"); +} + +static void write_swqe2_nonTSO(struct sk_buff *skb, + struct ehea_swqe *swqe, u32 lkey) +{ + int skb_data_size = skb->len - skb->data_len; + u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0]; + struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry; + u64 tmp_addr; + + /* Packet is any nonTSO type + * + * Copy as much as possible skb->data to immediate data and + * the rest to sg1entry + */ + if (skb_data_size >= SWQE2_MAX_IMM) { + /* copy immediate data */ + memcpy(imm_data, skb->data, SWQE2_MAX_IMM); + + swqe->immediate_data_length = SWQE2_MAX_IMM; + + if (skb_data_size > SWQE2_MAX_IMM) { + /* copy sg1entry data */ + sg1entry->l_key = lkey; + sg1entry->len = skb_data_size - SWQE2_MAX_IMM; + tmp_addr = (u64)(skb->data + SWQE2_MAX_IMM); + sg1entry->vaddr = tmp_addr; + swqe->descriptors++; + } + } else { + memcpy(imm_data, skb->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; + u64 tmp_addr; + + nfrags = skb_shinfo(skb)->nr_frags; + sg1entry = &swqe->u.immdata_desc.sg_entry; + sg_list = (struct ehea_vsgentry*)&swqe->u.immdata_desc.sg_list; + swqe->descriptors = 0; + sg1entry_contains_frag_data = 0; + + if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size) + write_swqe2_TSO(skb, swqe, lkey); + else + write_swqe2_nonTSO(skb, swqe, lkey); + + /* write descriptors */ + if (nfrags > 0) { + if (swqe->descriptors == 0) { + /* sg1entry not yet used */ + frag = &skb_shinfo(skb)->frags[0]; + + /* copy sg1entry data */ + sg1entry->l_key = lkey; + sg1entry->len = frag->size; + tmp_addr = (u64)(page_address(frag->page) + + frag->page_offset); + sg1entry->vaddr = tmp_addr; + swqe->descriptors++; + sg1entry_contains_frag_data = 1; + } + + for (i = sg1entry_contains_frag_data; i < nfrags; i++) { + + frag = &skb_shinfo(skb)->frags[i]; + sgentry = &sg_list[i - sg1entry_contains_frag_data]; + + sgentry->l_key = lkey; + sgentry->len = frag->size; + + tmp_addr = (u64)(page_address(frag->page) + + frag->page_offset); + sgentry->vaddr = tmp_addr; + swqe->descriptors++; + } + } +} + +static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid) +{ + int ret = 0; + u64 hret; + u8 reg_type; + + /* De/Register untagged packets */ + reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED; + hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, + port->logical_port_id, + reg_type, port->mac_addr, 0, hcallid); + if (hret != H_SUCCESS) { + ehea_error("reg_dereg_bcmc failed (tagged)"); + ret = -EIO; + goto out_herr; + } + + /* De/Register VLAN packets */ + reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL; + hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, + port->logical_port_id, + reg_type, port->mac_addr, 0, hcallid); + if (hret != H_SUCCESS) { + ehea_error("reg_dereg_bcmc failed (vlan)"); + ret = -EIO; + } +out_herr: + return ret; +} + +static int ehea_set_mac_addr(struct net_device *dev, void *sa) +{ + struct ehea_port *port = netdev_priv(dev); + struct sockaddr *mac_addr = sa; + struct hcp_ehea_port_cb0 *cb0; + int ret; + u64 hret; + + if (!is_valid_ether_addr(mac_addr->sa_data)) { + ret = -EADDRNOTAVAIL; + goto out; + } + + cb0 = kzalloc(H_CB_ALIGNMENT, GFP_KERNEL); + if (!cb0) { + ehea_error("no mem for cb0"); + ret = -ENOMEM; + goto out; + } + + memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN); + + cb0->port_mac_addr = cb0->port_mac_addr >> 16; + + hret = ehea_h_modify_ehea_port(port->adapter->handle, + port->logical_port_id, H_PORT_CB0, + EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0); + if (hret != H_SUCCESS) { + ret = -EIO; + goto out_free; + } + + memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len); + + /* Deregister old MAC in pHYP */ + ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC); + if (ret) + goto out_free; + + port->mac_addr = cb0->port_mac_addr << 16; + + /* Register new MAC in pHYP */ + ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); + if (ret) + goto out_free; + + ret = 0; +out_free: + kfree(cb0); +out: + return ret; +} + +static void ehea_promiscuous_error(u64 hret, int enable) +{ + ehea_info("Hypervisor denied %sabling promiscuous mode.%s", + enable == 1 ? "en" : "dis", + hret != H_AUTHORITY ? "" : " Another partition owning a " + "logical port on the same physical port might have altered " + "promiscuous mode first."); +} + +static void ehea_promiscuous(struct net_device *dev, int enable) +{ + struct ehea_port *port = netdev_priv(dev); + struct hcp_ehea_port_cb7 *cb7; + u64 hret; + + if ((enable && port->promisc) || (!enable && !port->promisc)) + return; + + cb7 = kzalloc(H_CB_ALIGNMENT, GFP_KERNEL); + if (!cb7) { + ehea_error("no mem for cb7"); + goto out; + } + + /* Modify Pxs_DUCQPN in CB7 */ + cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0; + + hret = ehea_h_modify_ehea_port(port->adapter->handle, + port->logical_port_id, + H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7); + if (hret) { + ehea_promiscuous_error(hret, enable); + goto out; + } + + port->promisc = enable; +out: + kfree(cb7); + return; +} + +static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr, + u32 hcallid) +{ + u64 hret; + u8 reg_type; + + reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST + | EHEA_BCMC_UNTAGGED; + + hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, + port->logical_port_id, + reg_type, mc_mac_addr, 0, hcallid); + if (hret) + goto out; + + reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST + | EHEA_BCMC_VLANID_ALL; + + hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, + port->logical_port_id, + reg_type, mc_mac_addr, 0, hcallid); +out: + return hret; +} + +static int ehea_drop_multicast_list(struct net_device *dev) +{ + struct ehea_port *port = netdev_priv(dev); + struct ehea_mc_list *mc_entry = port->mc_list; + struct list_head *pos; + struct list_head *temp; + int ret = 0; + u64 hret; + + list_for_each_safe(pos, temp, &(port->mc_list->list)) { + mc_entry = list_entry(pos, struct ehea_mc_list, list); + + hret = ehea_multicast_reg_helper(port, mc_entry->macaddr, + H_DEREG_BCMC); + if (hret) { + ehea_error("failed deregistering mcast MAC"); + ret = -EIO; + } + + list_del(pos); + kfree(mc_entry); + } + return ret; +} + +static void ehea_allmulti(struct net_device *dev, int enable) +{ + struct ehea_port *port = netdev_priv(dev); + u64 hret; + + if (!port->allmulti) { + if (enable) { + /* Enable ALLMULTI */ + ehea_drop_multicast_list(dev); + hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC); + if (!hret) + port->allmulti = 1; + else + ehea_error("failed enabling IFF_ALLMULTI"); + } + } else + if (!enable) { + /* Disable ALLMULTI */ + hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC); + if (!hret) + port->allmulti = 0; + else + ehea_error("failed disabling IFF_ALLMULTI"); + } +} + +static void ehea_add_multicast_entry(struct ehea_port* port, u8* mc_mac_addr) +{ + struct ehea_mc_list *ehea_mcl_entry; + u64 hret; + + ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_KERNEL); + if (!ehea_mcl_entry) { + ehea_error("no mem for mcl_entry"); + return; + } + + INIT_LIST_HEAD(&ehea_mcl_entry->list); + + memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN); + + hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr, + H_REG_BCMC); + if (!hret) + list_add(&ehea_mcl_entry->list, &port->mc_list->list); + else { + ehea_error("failed registering mcast MAC"); + kfree(ehea_mcl_entry); + } +} + +static void ehea_set_multicast_list(struct net_device *dev) +{ + struct ehea_port *port = netdev_priv(dev); + struct dev_mc_list *k_mcl_entry; + int ret, i; + + if (dev->flags & IFF_PROMISC) { + ehea_promiscuous(dev, 1); + return; + } + ehea_promiscuous(dev, 0); + + if (dev->flags & IFF_ALLMULTI) { + ehea_allmulti(dev, 1); + return; + } + ehea_allmulti(dev, 0); + + if (dev->mc_count) { + ret = ehea_drop_multicast_list(dev); + if (ret) { + /* Dropping the current multicast list failed. + * Enabling ALL_MULTI is the best we can do. + */ + ehea_allmulti(dev, 1); + } + + if (dev->mc_count > port->adapter->max_mc_mac) { + ehea_info("Mcast registration limit reached (0x%lx). " + "Use ALLMULTI!", + port->adapter->max_mc_mac); + goto out; + } + + for (i = 0, k_mcl_entry = dev->mc_list; + i < dev->mc_count; + i++, k_mcl_entry = k_mcl_entry->next) { + ehea_add_multicast_entry(port, k_mcl_entry->dmi_addr); + } + } +out: + return; +} + +static int ehea_change_mtu(struct net_device *dev, int new_mtu) +{ + if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE)) + return -EINVAL; + dev->mtu = new_mtu; + return 0; +} + +static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev, + struct ehea_swqe *swqe, u32 lkey) +{ + if (skb->protocol == htons(ETH_P_IP)) { + /* IPv4 */ + swqe->tx_control |= EHEA_SWQE_CRC + | EHEA_SWQE_IP_CHECKSUM + | EHEA_SWQE_TCP_CHECKSUM + | EHEA_SWQE_IMM_DATA_PRESENT + | EHEA_SWQE_DESCRIPTORS_PRESENT; + + write_ip_start_end(swqe, skb); + + if (skb->nh.iph->protocol == IPPROTO_UDP) { + if ((skb->nh.iph->frag_off & IP_MF) || + (skb->nh.iph->frag_off & IP_OFFSET)) + /* IP fragment, so don't change cs */ + swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM; + else + write_udp_offset_end(swqe, skb); + + } else if (skb->nh.iph->protocol == IPPROTO_TCP) { + write_tcp_offset_end(swqe, skb); + } + + /* icmp (big data) and ip segmentation packets (all other ip + packets) do not require any special handling */ + + } else { + /* Other Ethernet Protocol */ + swqe->tx_control |= EHEA_SWQE_CRC + | EHEA_SWQE_IMM_DATA_PRESENT + | EHEA_SWQE_DESCRIPTORS_PRESENT; + } + + write_swqe2_data(skb, dev, swqe, lkey); +} + +static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev, + struct ehea_swqe *swqe) +{ + int nfrags = skb_shinfo(skb)->nr_frags; + u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0]; + skb_frag_t *frag; + int i; + + if (skb->protocol == htons(ETH_P_IP)) { + /* IPv4 */ + write_ip_start_end(swqe, skb); + + if (skb->nh.iph->protocol == IPPROTO_TCP) { + swqe->tx_control |= EHEA_SWQE_CRC + | EHEA_SWQE_IP_CHECKSUM + | EHEA_SWQE_TCP_CHECKSUM + | EHEA_SWQE_IMM_DATA_PRESENT; + + write_tcp_offset_end(swqe, skb); + + } else if (skb->nh.iph->protocol == IPPROTO_UDP) { + if ((skb->nh.iph->frag_off & IP_MF) || + (skb->nh.iph->frag_off & IP_OFFSET)) + /* IP fragment, so don't change cs */ + swqe->tx_control |= EHEA_SWQE_CRC + | EHEA_SWQE_IMM_DATA_PRESENT; + else { + swqe->tx_control |= EHEA_SWQE_CRC + | EHEA_SWQE_IP_CHECKSUM + | EHEA_SWQE_TCP_CHECKSUM + | EHEA_SWQE_IMM_DATA_PRESENT; + + write_udp_offset_end(swqe, skb); + } + } else { + /* icmp (big data) and + ip segmentation packets (all other ip packets) */ + swqe->tx_control |= EHEA_SWQE_CRC + | EHEA_SWQE_IP_CHECKSUM + | EHEA_SWQE_IMM_DATA_PRESENT; + } + } else { + /* Other Ethernet Protocol */ + swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT; + } + /* copy (immediate) data */ + if (nfrags == 0) { + /* data is in a single piece */ + memcpy(imm_data, skb->data, skb->len); + } else { + /* first copy data from the skb->data buffer ... */ + memcpy(imm_data, skb->data, skb->len - skb->data_len); + imm_data += skb->len - skb->data_len; + + /* ... then copy data from the fragments */ + for (i = 0; i < nfrags; i++) { + frag = &skb_shinfo(skb)->frags[i]; + memcpy(imm_data, + page_address(frag->page) + frag->page_offset, + frag->size); + imm_data += frag->size; + } + } + swqe->immediate_data_length = skb->len; + dev_kfree_skb(skb); +} + +static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct ehea_port *port = netdev_priv(dev); + struct ehea_swqe *swqe; + unsigned long flags; + u32 lkey; + int swqe_index; + struct ehea_port_res *pr = &port->port_res[0]; + + spin_lock(&pr->xmit_lock); + + swqe = ehea_get_swqe(pr->qp, &swqe_index); + memset(swqe, 0, SWQE_HEADER_SIZE); + atomic_dec(&pr->swqe_avail); + + if (skb->len <= SWQE3_MAX_IMM) { + u32 sig_iv = port->sig_comp_iv; + u32 swqe_num = pr->swqe_id_counter; + ehea_xmit3(skb, dev, swqe); + swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE) + | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num); + if (pr->swqe_ll_count >= (sig_iv - 1)) { + swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL, + sig_iv); + swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; + pr->swqe_ll_count = 0; + } else + pr->swqe_ll_count += 1; + } else { + swqe->wr_id = + EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE) + | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter) + | EHEA_BMASK_SET(EHEA_WR_ID_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); + + if (pr->swqe_count >= (EHEA_SIG_IV_LONG - 1)) { + swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL, + EHEA_SIG_IV_LONG); + swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; + pr->swqe_count = 0; + } else + pr->swqe_count += 1; + } + pr->swqe_id_counter += 1; + + if (port->vgrp && vlan_tx_tag_present(skb)) { + swqe->tx_control |= EHEA_SWQE_VLAN_INSERT; + swqe->vlan_tag = vlan_tx_tag_get(skb); + } + + if (netif_msg_tx_queued(port)) { + ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr); + ehea_dump(swqe, sizeof(*swqe), "swqe"); + } + + ehea_post_swqe(pr->qp, swqe); + pr->tx_packets++; + + if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) { + spin_lock_irqsave(&pr->netif_queue, flags); + if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) { + netif_stop_queue(dev); + pr->queue_stopped = 1; + } + spin_unlock_irqrestore(&pr->netif_queue, flags); + } + dev->trans_start = jiffies; + spin_unlock(&pr->xmit_lock); + + return NETDEV_TX_OK; +} + +static void ehea_vlan_rx_register(struct net_device *dev, + struct vlan_group *grp) +{ + struct ehea_port *port = netdev_priv(dev); + struct ehea_adapter *adapter = port->adapter; + struct hcp_ehea_port_cb1 *cb1; + u64 hret; + + port->vgrp = grp; + + cb1 = kzalloc(H_CB_ALIGNMENT, GFP_KERNEL); + if (!cb1) { + ehea_error("no mem for cb1"); + goto out; + } + + if (grp) + memset(cb1->vlan_filter, 0, sizeof(cb1->vlan_filter)); + else + memset(cb1->vlan_filter, 0xFF, sizeof(cb1->vlan_filter)); + + hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, + H_PORT_CB1, H_PORT_CB1_ALL, cb1); + if (hret != H_SUCCESS) + ehea_error("modify_ehea_port failed"); + + kfree(cb1); +out: + return; +} + +static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid) +{ + struct ehea_port *port = netdev_priv(dev); + struct ehea_adapter *adapter = port->adapter; + struct hcp_ehea_port_cb1 *cb1; + int index; + u64 hret; + + cb1 = kzalloc(H_CB_ALIGNMENT, GFP_KERNEL); + if (!cb1) { + ehea_error("no mem for cb1"); + goto out; + } + + hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, + H_PORT_CB1, H_PORT_CB1_ALL, cb1); + if (hret != H_SUCCESS) { + ehea_error("query_ehea_port failed"); + goto out; + } + + index = (vid / 64); + cb1->vlan_filter[index] |= ((u64)(1 << (vid & 0x3F))); + + hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, + H_PORT_CB1, H_PORT_CB1_ALL, cb1); + if (hret != H_SUCCESS) + ehea_error("modify_ehea_port failed"); +out: + kfree(cb1); + return; +} + +static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid) +{ + struct ehea_port *port = netdev_priv(dev); + struct ehea_adapter *adapter = port->adapter; + struct hcp_ehea_port_cb1 *cb1; + int index; + u64 hret; + + if (port->vgrp) + port->vgrp->vlan_devices[vid] = NULL; + + cb1 = kzalloc(H_CB_ALIGNMENT, GFP_KERNEL); + if (!cb1) { + ehea_error("no mem for cb1"); + goto out; + } + + hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, + H_PORT_CB1, H_PORT_CB1_ALL, cb1); + if (hret != H_SUCCESS) { + ehea_error("query_ehea_port failed"); + goto out; + } + + index = (vid / 64); + cb1->vlan_filter[index] &= ~((u64)(1 << (vid & 0x3F))); + + hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, + H_PORT_CB1, H_PORT_CB1_ALL, cb1); + if (hret != H_SUCCESS) + ehea_error("modify_ehea_port failed"); +out: + kfree(cb1); + return; +} + +int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp) +{ + int ret = -EIO; + u64 hret; + u16 dummy16 = 0; + u64 dummy64 = 0; + struct hcp_modify_qp_cb0* cb0; + + cb0 = kzalloc(H_CB_ALIGNMENT, GFP_KERNEL); + if (!cb0) { + ret = -ENOMEM; + goto out; + } + + hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, + EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); + if (hret != H_SUCCESS) { + ehea_error("query_ehea_qp failed (1)"); + goto out; + } + + cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED; + hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, + EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, + &dummy64, &dummy64, &dummy16, &dummy16); + if (hret != H_SUCCESS) { + ehea_error("modify_ehea_qp failed (1)"); + goto out; + } + + hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, + EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); + if (hret != H_SUCCESS) { + ehea_error("query_ehea_qp failed (2)"); + goto out; + } + + cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED; + hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, + EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, + &dummy64, &dummy64, &dummy16, &dummy16); + if (hret != H_SUCCESS) { + ehea_error("modify_ehea_qp failed (2)"); + goto out; + } + + hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, + EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); + if (hret != H_SUCCESS) { + ehea_error("query_ehea_qp failed (3)"); + goto out; + } + + cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND; + hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, + EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, + &dummy64, &dummy64, &dummy16, &dummy16); + if (hret != H_SUCCESS) { + ehea_error("modify_ehea_qp failed (3)"); + goto out; + } + + hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, + EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); + if (hret != H_SUCCESS) { + ehea_error("query_ehea_qp failed (4)"); + goto out; + } + + ret = 0; +out: + kfree(cb0); + return ret; +} + +static int ehea_port_res_setup(struct ehea_port *port, int def_qps, + int add_tx_qps) +{ + int ret, i; + struct port_res_cfg pr_cfg, pr_cfg_small_rx; + enum ehea_eq_type eq_type = EHEA_EQ; + + port->qp_eq = ehea_create_eq(port->adapter, eq_type, + EHEA_MAX_ENTRIES_EQ, 1); + if (!port->qp_eq) { + ret = -EINVAL; + ehea_error("ehea_create_eq failed (qp_eq)"); + goto out_kill_eq; + } + + pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries; + pr_cfg.max_entries_scq = sq_entries; + pr_cfg.max_entries_sq = sq_entries; + pr_cfg.max_entries_rq1 = rq1_entries; + pr_cfg.max_entries_rq2 = rq2_entries; + pr_cfg.max_entries_rq3 = rq3_entries; + + pr_cfg_small_rx.max_entries_rcq = 1; + pr_cfg_small_rx.max_entries_scq = sq_entries; + pr_cfg_small_rx.max_entries_sq = sq_entries; + pr_cfg_small_rx.max_entries_rq1 = 1; + pr_cfg_small_rx.max_entries_rq2 = 1; + pr_cfg_small_rx.max_entries_rq3 = 1; + + for (i = 0; i < def_qps; i++) { + ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i); + if (ret) + goto out_clean_pr; + } + for (i = def_qps; i < def_qps + add_tx_qps; i++) { + ret = ehea_init_port_res(port, &port->port_res[i], + &pr_cfg_small_rx, i); + if (ret) + goto out_clean_pr; + } + + return 0; + +out_clean_pr: + while (--i >= 0) + ehea_clean_portres(port, &port->port_res[i]); + +out_kill_eq: + ehea_destroy_eq(port->qp_eq); + return ret; +} + +static int ehea_clean_all_portres(struct ehea_port *port) +{ + int ret = 0; + int i; + + for(i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) + ret |= ehea_clean_portres(port, &port->port_res[i]); + + ret |= ehea_destroy_eq(port->qp_eq); + + return ret; +} + +static int ehea_up(struct net_device *dev) +{ + int ret, i; + struct ehea_port *port = netdev_priv(dev); + u64 mac_addr = 0; + + if (port->state == EHEA_PORT_UP) + return 0; + + ret = ehea_port_res_setup(port, port->num_def_qps, + port->num_add_tx_qps); + if (ret) { + ehea_error("port_res_failed"); + goto out; + } + + /* Set default QP for this port */ + ret = ehea_configure_port(port); + if (ret) { + ehea_error("ehea_configure_port failed. ret:%d", ret); + goto out_clean_pr; + } + + ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); + if (ret) { + ret = -EIO; + ehea_error("out_clean_pr"); + goto out_clean_pr; + } + mac_addr = (*(u64*)dev->dev_addr) >> 16; + + ret = ehea_reg_interrupts(dev); + if (ret) { + ehea_error("out_dereg_bc"); + goto out_dereg_bc; + } + + for(i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) { + ret = ehea_activate_qp(port->adapter, port->port_res[i].qp); + if (ret) { + ehea_error("activate_qp failed"); + goto out_free_irqs; + } + } + + for(i = 0; i < port->num_def_qps; i++) { + ret = ehea_fill_port_res(&port->port_res[i]); + if (ret) { + ehea_error("out_free_irqs"); + goto out_free_irqs; + } + } + + ret = 0; + port->state = EHEA_PORT_UP; + goto out; + +out_free_irqs: + ehea_free_interrupts(dev); + +out_dereg_bc: + ehea_broadcast_reg_helper(port, H_DEREG_BCMC); + +out_clean_pr: + ehea_clean_all_portres(port); +out: + return ret; +} + +static int ehea_open(struct net_device *dev) +{ + int ret; + struct ehea_port *port = netdev_priv(dev); + + down(&port->port_lock); + + if (netif_msg_ifup(port)) + ehea_info("enabling port %s", dev->name); + + ret = ehea_up(dev); + if (!ret) + netif_start_queue(dev); + + up(&port->port_lock); + + return ret; +} + +static int ehea_down(struct net_device *dev) +{ + int ret, i; + struct ehea_port *port = netdev_priv(dev); + + if (port->state == EHEA_PORT_DOWN) + return 0; + + ehea_drop_multicast_list(dev); + ehea_free_interrupts(dev); + + for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) + tasklet_kill(&port->port_res[i].send_comp_task); + + ehea_broadcast_reg_helper(port, H_DEREG_BCMC); + ret = ehea_clean_all_portres(port); + port->state = EHEA_PORT_DOWN; + return ret; +} + +static int ehea_stop(struct net_device *dev) +{ + int ret; + struct ehea_port *port = netdev_priv(dev); + + if (netif_msg_ifdown(port)) + ehea_info("disabling port %s", dev->name); + + flush_workqueue(port->adapter->ehea_wq); + down(&port->port_lock); + netif_stop_queue(dev); + ret = ehea_down(dev); + up(&port->port_lock); + return ret; +} + +static void ehea_reset_port(void *data) +{ + int ret; + struct net_device *dev = data; + struct ehea_port *port = netdev_priv(dev); + + port->resets++; + down(&port->port_lock); + netif_stop_queue(dev); + netif_poll_disable(dev); + + ret = ehea_down(dev); + if (ret) + ehea_error("ehea_down failed. not all resources are freed"); + + ret = ehea_up(dev); + if (ret) { + ehea_error("Reset device %s failed: ret=%d", dev->name, ret); + goto out; + } + + if (netif_msg_timer(port)) + ehea_info("Device %s resetted successfully", dev->name); + + netif_poll_enable(dev); + netif_wake_queue(dev); +out: + up(&port->port_lock); + return; +} + +static void ehea_tx_watchdog(struct net_device *dev) +{ + struct ehea_port *port = netdev_priv(dev); + + if (netif_carrier_ok(dev)) + queue_work(port->adapter->ehea_wq, &port->reset_task); +} + +int ehea_sense_adapter_attr(struct ehea_adapter *adapter) +{ + struct hcp_query_ehea *cb; + u64 hret; + int ret; + + cb = kzalloc(H_CB_ALIGNMENT, 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->num_ports = cb->num_ports; + adapter->max_mc_mac = cb->max_mc_mac - 1; + ret = 0; + +out_herr: + kfree(cb); +out: + return ret; +} + +static int ehea_setup_single_port(struct ehea_port *port, + struct device_node *dn) +{ + int ret; + u64 hret; + struct net_device *dev = port->netdev; + struct ehea_adapter *adapter = port->adapter; + struct hcp_ehea_port_cb4 *cb4; + u32 *dn_log_port_id; + + sema_init(&port->port_lock, 1); + port->state = EHEA_PORT_DOWN; + port->sig_comp_iv = sq_entries / 10; + + if (!dn) { + ehea_error("bad device node: dn=%p", dn); + ret = -EINVAL; + goto out; + } + + port->of_dev_node = dn; + + /* Determine logical port id */ + dn_log_port_id = (u32*)get_property(dn, "ibm,hea-port-no", NULL); + + if (!dn_log_port_id) { + ehea_error("bad device node: dn_log_port_id=%p", + dn_log_port_id); + ret = -EINVAL; + goto out; + } + port->logical_port_id = *dn_log_port_id; + + port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL); + if (!port->mc_list) { + ret = -ENOMEM; + goto out; + } + + INIT_LIST_HEAD(&port->mc_list->list); + + ehea_set_portspeed(port, EHEA_SPEED_AUTONEG); + + ret = ehea_sense_port_attr(port); + if (ret) + goto out; + + /* Enable Jumbo frames */ + cb4 = kzalloc(H_CB_ALIGNMENT, GFP_KERNEL); + if (!cb4) { + ehea_error("no mem for cb4"); + } else { + cb4->jumbo_frame = 1; + hret = ehea_h_modify_ehea_port(adapter->handle, + port->logical_port_id, + H_PORT_CB4, H_PORT_CB4_JUMBO, + cb4); + if (hret != H_SUCCESS) { + ehea_info("Jumbo frames not activated"); + } + kfree(cb4); + } + + /* initialize net_device structure */ + SET_MODULE_OWNER(dev); + + memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN); + + dev->open = ehea_open; + dev->poll = ehea_poll; + dev->weight = 64; + dev->stop = ehea_stop; + dev->hard_start_xmit = ehea_start_xmit; + dev->get_stats = ehea_get_stats; + dev->set_multicast_list = ehea_set_multicast_list; + dev->set_mac_address = ehea_set_mac_addr; + dev->change_mtu = ehea_change_mtu; + dev->vlan_rx_register = ehea_vlan_rx_register; + dev->vlan_rx_add_vid = ehea_vlan_rx_add_vid; + dev->vlan_rx_kill_vid = ehea_vlan_rx_kill_vid; + dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO + | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_TX + | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER + | NETIF_F_LLTX; + dev->tx_timeout = &ehea_tx_watchdog; + dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT; + + INIT_WORK(&port->reset_task, ehea_reset_port, dev); + + ehea_set_ethtool_ops(dev); + + ret = register_netdev(dev); + if (ret) { + ehea_error("register_netdev failed. ret=%d", ret); + goto out_free; + } + + port->netdev = dev; + ret = 0; + goto out; + +out_free: + kfree(port->mc_list); +out: + return ret; +} + +static int ehea_setup_ports(struct ehea_adapter *adapter) +{ + int ret; + int port_setup_ok = 0; + struct ehea_port *port; + struct device_node *dn = NULL; + struct net_device *dev; + int i; + + /* get port properties for all ports */ + for (i = 0; i < adapter->num_ports; i++) { + + if (adapter->port[i]) + continue; /* port already up and running */ + + /* allocate memory for the port structures */ + dev = alloc_etherdev(sizeof(struct ehea_port)); + + if (!dev) { + ehea_error("no mem for net_device"); + break; + } + + port = netdev_priv(dev); + port->adapter = adapter; + port->netdev = dev; + adapter->port[i] = port; + port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT); + + dn = of_find_node_by_name(dn, "ethernet"); + ret = ehea_setup_single_port(port, dn); + if (ret) { + /* Free mem for this port struct. The others will be + processed on rollback */ + free_netdev(dev); + adapter->port[i] = NULL; + ehea_error("eHEA port %d setup failed, ret=%d", i, ret); + } + } + + of_node_put(dn); + + /* Check for succesfully set up ports */ + for (i = 0; i < adapter->num_ports; i++) + if (adapter->port[i]) + port_setup_ok++; + + if (port_setup_ok) + ret = 0; /* At least some ports are setup correctly */ + else + ret = -EINVAL; + + return ret; +} + +static int __devinit ehea_probe(struct ibmebus_dev *dev, + const struct of_device_id *id) +{ + struct ehea_adapter *adapter; + u64 *adapter_handle; + int ret; + + adapter = kzalloc(sizeof(*adapter), GFP_KERNEL); + if (!adapter) { + ret = -ENOMEM; + dev_err(&dev->ofdev.dev, "no mem for ehea_adapter\n"); + goto out; + } + + adapter_handle = (u64*)get_property(dev->ofdev.node, "ibm,hea-handle", + NULL); + if (!adapter_handle) { + dev_err(&dev->ofdev.dev, "failed getting handle for adapter" + " '%s'\n", dev->ofdev.node->full_name); + ret = -ENODEV; + goto out_free_ad; + } + + adapter->handle = *adapter_handle; + adapter->pd = EHEA_PD_ID; + + dev->ofdev.dev.driver_data = adapter; + + ret = ehea_reg_mr_adapter(adapter); + if (ret) { + dev_err(&dev->ofdev.dev, "reg_mr_adapter failed\n"); + goto out_free_ad; + } + + /* initialize adapter and ports */ + /* get adapter properties */ + ret = ehea_sense_adapter_attr(adapter); + if (ret) { + dev_err(&dev->ofdev.dev, "sense_adapter_attr failed: %d", ret); + goto out_free_res; + } + dev_info(&dev->ofdev.dev, "%d eHEA ports found\n", adapter->num_ports); + + adapter->neq = ehea_create_eq(adapter, + EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1); + if (!adapter->neq) { + dev_err(&dev->ofdev.dev, "NEQ creation failed"); + goto out_free_res; + } + + tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet, + (unsigned long)adapter); + + ret = ibmebus_request_irq(NULL, adapter->neq->attr.ist1, + ehea_interrupt_neq, SA_INTERRUPT, + "ehea_neq", adapter); + if (ret) { + dev_err(&dev->ofdev.dev, "requesting NEQ IRQ failed"); + goto out_kill_eq; + } + + adapter->ehea_wq = create_workqueue("ehea_wq"); + if (!adapter->ehea_wq) + goto out_free_irq; + + ret = ehea_setup_ports(adapter); + if (ret) { + dev_err(&dev->ofdev.dev, "setup_ports failed"); + goto out_kill_wq; + } + + ret = 0; + goto out; + +out_kill_wq: + destroy_workqueue(adapter->ehea_wq); + +out_free_irq: + ibmebus_free_irq(NULL, adapter->neq->attr.ist1, adapter); + +out_kill_eq: + ehea_destroy_eq(adapter->neq); + +out_free_res: + ehea_h_free_resource(adapter->handle, adapter->mr.handle); + +out_free_ad: + kfree(adapter); +out: + return ret; +} + +static void ehea_shutdown_single_port(struct ehea_port *port) +{ + unregister_netdev(port->netdev); + kfree(port->mc_list); + free_netdev(port->netdev); +} + +static int __devexit ehea_remove(struct ibmebus_dev *dev) +{ + struct ehea_adapter *adapter = dev->ofdev.dev.driver_data; + u64 hret; + int i; + + for (i = 0; i < adapter->num_ports; i++) + if (adapter->port[i]) { + ehea_shutdown_single_port(adapter->port[i]); + adapter->port[i] = NULL; + } + destroy_workqueue(adapter->ehea_wq); + + ibmebus_free_irq(NULL, adapter->neq->attr.ist1, adapter); + + ehea_destroy_eq(adapter->neq); + + hret = ehea_h_free_resource(adapter->handle, adapter->mr.handle); + if (hret) { + dev_err(&dev->ofdev.dev, "free_resource_mr failed"); + return -EIO; + } + kfree(adapter); + return 0; +} + +static int check_module_parm(void) +{ + int ret = 0; + + if ((rq1_entries < EHEA_MIN_ENTRIES_QP) || + (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) { + ehea_info("Bad parameter: rq1_entries"); + ret = -EINVAL; + } + if ((rq2_entries < EHEA_MIN_ENTRIES_QP) || + (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) { + ehea_info("Bad parameter: rq2_entries"); + ret = -EINVAL; + } + if ((rq3_entries < EHEA_MIN_ENTRIES_QP) || + (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) { + ehea_info("Bad parameter: rq3_entries"); + ret = -EINVAL; + } + if ((sq_entries < EHEA_MIN_ENTRIES_QP) || + (sq_entries > EHEA_MAX_ENTRIES_SQ)) { + ehea_info("Bad parameter: sq_entries"); + ret = -EINVAL; + } + + return ret; +} + +static struct of_device_id ehea_device_table[] = { + { + .name = "lhea", + .compatible = "IBM,lhea", + }, + {}, +}; + +static struct ibmebus_driver ehea_driver = { + .name = "ehea", + .id_table = ehea_device_table, + .probe = ehea_probe, + .remove = ehea_remove, +}; + +int __init ehea_module_init(void) +{ + int ret; + + printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n", + DRV_VERSION); + + ret = check_module_parm(); + if (ret) + goto out; + ret = ibmebus_register_driver(&ehea_driver); + if (ret) + ehea_error("failed registering eHEA device driver on ebus"); + +out: + return ret; +} + +static void __exit ehea_module_exit(void) +{ + ibmebus_unregister_driver(&ehea_driver); +} + +module_init(ehea_module_init); +module_exit(ehea_module_exit); |