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linux/drivers/net/ehea/ehea_main.c
Thomas Klein 41b69c7051 ehea: Fixed possible nullpointer access 
Fixed possible nullpointer access in event queue processing

Signed-off-by: Thomas Klein <tklein@de.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-01-23 00:59:21 -05:00

2665 lines
64 KiB
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/*
* 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(PAGE_SIZE, 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 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 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 ehea_port *port = param;
struct ehea_eqe *eqe;
u32 qp_token;
eqe = ehea_poll_eq(port->qp_eq);
while (eqe) {
qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
ehea_error("QP aff_err: entry=0x%lx, token=0x%x",
eqe->entry, qp_token);
eqe = ehea_poll_eq(port->qp_eq);
}
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])
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(PAGE_SIZE, GFP_ATOMIC); /* May be called via */
if (!cb0) { /* ehea_neq_tasklet() */
ehea_error("no mem for cb0");
ret = -ENOMEM;
goto out;
}
hret = ehea_h_query_ehea_port(port->adapter->handle,
port->logical_port_id, H_PORT_CB0,
EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
cb0);
if (hret != H_SUCCESS) {
ret = -EIO;
goto out_free;
}
/* MAC address */
port->mac_addr = cb0->port_mac_addr << 16;
if (!is_valid_ether_addr((u8*)&port->mac_addr)) {
ret = -EADDRNOTAVAIL;
goto out_free;
}
/* Port speed */
switch (cb0->port_speed) {
case H_SPEED_10M_H:
port->port_speed = EHEA_SPEED_10M;
port->full_duplex = 0;
break;
case H_SPEED_10M_F:
port->port_speed = EHEA_SPEED_10M;
port->full_duplex = 1;
break;
case H_SPEED_100M_H:
port->port_speed = EHEA_SPEED_100M;
port->full_duplex = 0;
break;
case H_SPEED_100M_F:
port->port_speed = EHEA_SPEED_100M;
port->full_duplex = 1;
break;
case H_SPEED_1G_F:
port->port_speed = EHEA_SPEED_1G;
port->full_duplex = 1;
break;
case H_SPEED_10G_F:
port->port_speed = EHEA_SPEED_10G;
port->full_duplex = 1;
break;
default:
port->port_speed = 0;
port->full_duplex = 0;
break;
}
port->autoneg = 1;
/* 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(PAGE_SIZE, GFP_KERNEL);
if (!cb4) {
ehea_error("no mem for cb4");
ret = -ENOMEM;
goto out;
}
cb4->port_speed = port_speed;
netif_carrier_off(port->netdev);
hret = ehea_h_modify_ehea_port(port->adapter->handle,
port->logical_port_id,
H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
if (hret == H_SUCCESS) {
port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
hret = ehea_h_query_ehea_port(port->adapter->handle,
port->logical_port_id,
H_PORT_CB4, H_PORT_CB4_SPEED,
cb4);
if (hret == H_SUCCESS) {
switch (cb4->port_speed) {
case H_SPEED_10M_H:
port->port_speed = EHEA_SPEED_10M;
port->full_duplex = 0;
break;
case H_SPEED_10M_F:
port->port_speed = EHEA_SPEED_10M;
port->full_duplex = 1;
break;
case H_SPEED_100M_H:
port->port_speed = EHEA_SPEED_100M;
port->full_duplex = 0;
break;
case H_SPEED_100M_F:
port->port_speed = EHEA_SPEED_100M;
port->full_duplex = 1;
break;
case H_SPEED_1G_F:
port->port_speed = EHEA_SPEED_1G;
port->full_duplex = 1;
break;
case H_SPEED_10G_F:
port->port_speed = EHEA_SPEED_10G;
port->full_duplex = 1;
break;
default:
port->port_speed = 0;
port->full_duplex = 0;
break;
}
} else {
ehea_error("Failed sensing port speed");
ret = -EIO;
}
} else {
if (hret == H_AUTHORITY) {
ehea_info("Hypervisor denied setting port speed");
ret = -EPERM;
} else {
ret = -EIO;
ehea_error("Failed setting port speed");
}
}
netif_carrier_on(port->netdev);
kfree(cb4);
out:
return ret;
}
static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
{
int ret;
u8 ec;
u8 portnum;
struct ehea_port *port;
ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
port = ehea_get_port(adapter, portnum);
switch (ec) {
case EHEA_EC_PORTSTATE_CHG: /* port state change */
if (!port) {
ehea_error("unknown portnum %x", portnum);
break;
}
if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
if (!netif_carrier_ok(port->netdev)) {
ret = ehea_sense_port_attr(port);
if (ret) {
ehea_error("failed resensing port "
"attributes");
break;
}
if (netif_msg_link(port))
ehea_info("%s: Logical port up: %dMbps "
"%s Duplex",
port->netdev->name,
port->port_speed,
port->full_duplex ==
1 ? "Full" : "Half");
netif_carrier_on(port->netdev);
netif_wake_queue(port->netdev);
}
} else
if (netif_carrier_ok(port->netdev)) {
if (netif_msg_link(port))
ehea_info("%s: Logical port down",
port->netdev->name);
netif_carrier_off(port->netdev);
netif_stop_queue(port->netdev);
}
if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
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, eqe=0x%lX", ec, eqe);
break;
}
}
static void ehea_neq_tasklet(unsigned long data)
{
struct ehea_adapter *adapter = (struct ehea_adapter*)data;
struct ehea_eqe *eqe;
u64 event_mask;
eqe = ehea_poll_eq(adapter->neq);
ehea_debug("eqe=%p", eqe);
while (eqe) {
ehea_debug("*eqe=%lx", eqe->entry);
ehea_parse_eqe(adapter, eqe->entry);
eqe = ehea_poll_eq(adapter->neq);
ehea_debug("next eqe=%p", eqe);
}
event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
| EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
| EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
ehea_h_reset_events(adapter->handle,
adapter->neq->fw_handle, event_mask);
}
static irqreturn_t ehea_interrupt_neq(int irq, void *param)
{
struct ehea_adapter *adapter = param;
tasklet_hi_schedule(&adapter->neq_tasklet);
return IRQ_HANDLED;
}
static int ehea_fill_port_res(struct ehea_port_res *pr)
{
int ret;
struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
ret = ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
- init_attr->act_nr_rwqes_rq2
- init_attr->act_nr_rwqes_rq3 - 1);
ret |= ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
return ret;
}
static int ehea_reg_interrupts(struct net_device *dev)
{
struct ehea_port *port = netdev_priv(dev);
struct ehea_port_res *pr;
int i, ret;
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(PAGE_SIZE, GFP_KERNEL);
if (!cb0)
goto out;
cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
| EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
| EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
| EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
| EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
PXLY_RC_VLAN_FILTER)
| EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
for (i = 0; i < port->num_def_qps; i++)
cb0->default_qpn_arr[i] = port->port_res[0].qp->init_attr.qp_nr;
if (netif_msg_ifup(port))
ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
| EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
hret = ehea_h_modify_ehea_port(port->adapter->handle,
port->logical_port_id,
H_PORT_CB0, mask, cb0);
ret = -EIO;
if (hret != H_SUCCESS)
goto out_free;
ret = 0;
out_free:
kfree(cb0);
out:
return ret;
}
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(PAGE_SIZE, GFP_KERNEL);
if (!cb0) {
ehea_error("no mem for cb0");
ret = -ENOMEM;
goto out;
}
memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
cb0->port_mac_addr = cb0->port_mac_addr >> 16;
hret = ehea_h_modify_ehea_port(port->adapter->handle,
port->logical_port_id, H_PORT_CB0,
EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
if (hret != H_SUCCESS) {
ret = -EIO;
goto out_free;
}
memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
/* 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)
{
if (hret == H_AUTHORITY)
ehea_info("Hypervisor denied %sabling promiscuous mode",
enable == 1 ? "en" : "dis");
else
ehea_error("failed %sabling promiscuous mode",
enable == 1 ? "en" : "dis");
}
static void ehea_promiscuous(struct net_device *dev, int enable)
{
struct ehea_port *port = netdev_priv(dev);
struct hcp_ehea_port_cb7 *cb7;
u64 hret;
if ((enable && port->promisc) || (!enable && !port->promisc))
return;
cb7 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
if (!cb7) {
ehea_error("no mem for cb7");
goto out;
}
/* Modify Pxs_DUCQPN in CB7 */
cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
hret = ehea_h_modify_ehea_port(port->adapter->handle,
port->logical_port_id,
H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
if (hret) {
ehea_promiscuous_error(hret, enable);
goto out;
}
port->promisc = enable;
out:
kfree(cb7);
return;
}
static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
u32 hcallid)
{
u64 hret;
u8 reg_type;
reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
| EHEA_BCMC_UNTAGGED;
hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
port->logical_port_id,
reg_type, mc_mac_addr, 0, hcallid);
if (hret)
goto out;
reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
| EHEA_BCMC_VLANID_ALL;
hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
port->logical_port_id,
reg_type, mc_mac_addr, 0, hcallid);
out:
return hret;
}
static int ehea_drop_multicast_list(struct net_device *dev)
{
struct ehea_port *port = netdev_priv(dev);
struct ehea_mc_list *mc_entry = port->mc_list;
struct list_head *pos;
struct list_head *temp;
int ret = 0;
u64 hret;
list_for_each_safe(pos, temp, &(port->mc_list->list)) {
mc_entry = list_entry(pos, struct ehea_mc_list, list);
hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
H_DEREG_BCMC);
if (hret) {
ehea_error("failed deregistering mcast MAC");
ret = -EIO;
}
list_del(pos);
kfree(mc_entry);
}
return ret;
}
static void ehea_allmulti(struct net_device *dev, int enable)
{
struct ehea_port *port = netdev_priv(dev);
u64 hret;
if (!port->allmulti) {
if (enable) {
/* Enable ALLMULTI */
ehea_drop_multicast_list(dev);
hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
if (!hret)
port->allmulti = 1;
else
ehea_error("failed enabling IFF_ALLMULTI");
}
} else
if (!enable) {
/* Disable ALLMULTI */
hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
if (!hret)
port->allmulti = 0;
else
ehea_error("failed disabling IFF_ALLMULTI");
}
}
static void ehea_add_multicast_entry(struct ehea_port* port, u8* mc_mac_addr)
{
struct ehea_mc_list *ehea_mcl_entry;
u64 hret;
ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
if (!ehea_mcl_entry) {
ehea_error("no mem for mcl_entry");
return;
}
INIT_LIST_HEAD(&ehea_mcl_entry->list);
memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
H_REG_BCMC);
if (!hret)
list_add(&ehea_mcl_entry->list, &port->mc_list->list);
else {
ehea_error("failed registering mcast MAC");
kfree(ehea_mcl_entry);
}
}
static void ehea_set_multicast_list(struct net_device *dev)
{
struct ehea_port *port = netdev_priv(dev);
struct dev_mc_list *k_mcl_entry;
int ret, i;
if (dev->flags & IFF_PROMISC) {
ehea_promiscuous(dev, 1);
return;
}
ehea_promiscuous(dev, 0);
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, 512, "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(PAGE_SIZE, 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(PAGE_SIZE, GFP_KERNEL);
if (!cb1) {
ehea_error("no mem for cb1");
goto out;
}
hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
H_PORT_CB1, H_PORT_CB1_ALL, cb1);
if (hret != H_SUCCESS) {
ehea_error("query_ehea_port failed");
goto out;
}
index = (vid / 64);
cb1->vlan_filter[index] |= ((u64)(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(PAGE_SIZE, GFP_KERNEL);
if (!cb1) {
ehea_error("no mem for cb1");
goto out;
}
hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
H_PORT_CB1, H_PORT_CB1_ALL, cb1);
if (hret != H_SUCCESS) {
ehea_error("query_ehea_port failed");
goto out;
}
index = (vid / 64);
cb1->vlan_filter[index] &= ~((u64)(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(PAGE_SIZE, GFP_KERNEL);
if (!cb0) {
ret = -ENOMEM;
goto out;
}
hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
if (hret != H_SUCCESS) {
ehea_error("query_ehea_qp failed (1)");
goto out;
}
cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
&dummy64, &dummy64, &dummy16, &dummy16);
if (hret != H_SUCCESS) {
ehea_error("modify_ehea_qp failed (1)");
goto out;
}
hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
if (hret != H_SUCCESS) {
ehea_error("query_ehea_qp failed (2)");
goto out;
}
cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
&dummy64, &dummy64, &dummy16, &dummy16);
if (hret != H_SUCCESS) {
ehea_error("modify_ehea_qp failed (2)");
goto out;
}
hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
if (hret != H_SUCCESS) {
ehea_error("query_ehea_qp failed (3)");
goto out;
}
cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
&dummy64, &dummy64, &dummy16, &dummy16);
if (hret != H_SUCCESS) {
ehea_error("modify_ehea_qp failed (3)");
goto out;
}
hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
if (hret != H_SUCCESS) {
ehea_error("query_ehea_qp failed (4)");
goto out;
}
ret = 0;
out:
kfree(cb0);
return ret;
}
static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
int add_tx_qps)
{
int ret, i;
struct port_res_cfg pr_cfg, pr_cfg_small_rx;
enum ehea_eq_type eq_type = EHEA_EQ;
port->qp_eq = ehea_create_eq(port->adapter, eq_type,
EHEA_MAX_ENTRIES_EQ, 1);
if (!port->qp_eq) {
ret = -EINVAL;
ehea_error("ehea_create_eq failed (qp_eq)");
goto out_kill_eq;
}
pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
pr_cfg.max_entries_scq = sq_entries;
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(struct work_struct *work)
{
int ret;
struct ehea_port *port =
container_of(work, struct ehea_port, reset_task);
struct net_device *dev = port->netdev;
port->resets++;
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;
struct device_node *lhea_dn = NULL;
struct device_node *eth_dn = NULL;
u64 hret;
int ret;
cb = kzalloc(PAGE_SIZE, GFP_KERNEL);
if (!cb) {
ret = -ENOMEM;
goto out;
}
hret = ehea_h_query_ehea(adapter->handle, cb);
if (hret != H_SUCCESS) {
ret = -EIO;
goto out_herr;
}
/* Determine the number of available logical ports
* by counting the child nodes of the lhea OFDT entry
*/
adapter->num_ports = 0;
lhea_dn = of_find_node_by_name(lhea_dn, "lhea");
do {
eth_dn = of_get_next_child(lhea_dn, eth_dn);
if (eth_dn)
adapter->num_ports++;
} while ( eth_dn );
of_node_put(lhea_dn);
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);
ret = ehea_sense_port_attr(port);
if (ret)
goto out;
/* Enable Jumbo frames */
cb4 = kzalloc(PAGE_SIZE, 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);
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)
adapter->handle = *adapter_handle;
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->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);
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