// SPDX-License-Identifier: GPL-2.0-or-later
/*
* linux/drivers/net/ethernet/ibm/ehea/ehea_main.c
*
* eHEA ethernet device driver for IBM eServer System p
*
* (C) Copyright IBM Corp. 2006
*
* Authors:
* Christoph Raisch <[email protected]>
* Jan-Bernd Themann <[email protected]>
* Thomas Klein <[email protected]>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/device.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/if.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/if_ether.h>
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/memory.h>
#include <asm/kexec.h>
#include <linux/mutex.h>
#include <linux/prefetch.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <net/ip.h>
#include "ehea.h"
#include "ehea_qmr.h"
#include "ehea_phyp.h"
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Christoph Raisch <[email protected]>");
MODULE_DESCRIPTION("IBM eServer HEA Driver");
MODULE_VERSION(DRV_VERSION);
static int msg_level = -1;
static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
static int sq_entries = EHEA_DEF_ENTRIES_SQ;
static int use_mcs = 1;
static int prop_carrier_state;
module_param(msg_level, int, 0);
module_param(rq1_entries, int, 0);
module_param(rq2_entries, int, 0);
module_param(rq3_entries, int, 0);
module_param(sq_entries, int, 0);
module_param(prop_carrier_state, int, 0);
module_param(use_mcs, int, 0);
MODULE_PARM_DESC(msg_level, "msg_level");
MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
"port to stack. 1:yes, 0:no. Default = 0 ");
MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
"[2^x - 1], x = [7..14]. Default = "
__MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
"[2^x - 1], x = [7..14]. Default = "
__MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
"[2^x - 1], x = [7..14]. Default = "
__MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue "
"[2^x - 1], x = [7..14]. Default = "
__MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
"Default = 1");
static int port_name_cnt;
static LIST_HEAD(adapter_list);
static unsigned long ehea_driver_flags;
static DEFINE_MUTEX(dlpar_mem_lock);
static struct ehea_fw_handle_array ehea_fw_handles;
static struct ehea_bcmc_reg_array ehea_bcmc_regs;
static int ehea_probe_adapter(struct platform_device *dev);
static void ehea_remove(struct platform_device *dev);
static const struct of_device_id ehea_module_device_table[] = {
{
.name = "lhea",
.compatible = "IBM,lhea",
},
{
.type = "network",
.compatible = "IBM,lhea-ethernet",
},
{},
};
MODULE_DEVICE_TABLE(of, ehea_module_device_table);
static const struct of_device_id ehea_device_table[] = {
{
.name = "lhea",
.compatible = "IBM,lhea",
},
{},
};
MODULE_DEVICE_TABLE(of, ehea_device_table);
static struct platform_driver ehea_driver = {
.driver = {
.name = "ehea",
.owner = THIS_MODULE,
.of_match_table = ehea_device_table,
},
.probe = ehea_probe_adapter,
.remove_new = ehea_remove,
};
void ehea_dump(void *adr, int len, char *msg)
{
int x;
unsigned char *deb = adr;
for (x = 0; x < len; x += 16) {
pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
deb += 16;
}
}
static void ehea_schedule_port_reset(struct ehea_port *port)
{
if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
schedule_work(&port->reset_task);
}
static void ehea_update_firmware_handles(void)
{
struct ehea_fw_handle_entry *arr = NULL;
struct ehea_adapter *adapter;
int num_adapters = 0;
int num_ports = 0;
int num_portres = 0;
int i = 0;
int num_fw_handles, k, l;
/* Determine number of handles */
mutex_lock(&ehea_fw_handles.lock);
list_for_each_entry(adapter, &adapter_list, list) {
num_adapters++;
for (k = 0; k < EHEA_MAX_PORTS; k++) {
struct ehea_port *port = adapter->port[k];
if (!port || (port->state != EHEA_PORT_UP))
continue;
num_ports++;
num_portres += port->num_def_qps;
}
}
num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
num_ports * EHEA_NUM_PORT_FW_HANDLES +
num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
if (num_fw_handles) {
arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
if (!arr)
goto out; /* Keep the existing array */
} else
goto out_update;
list_for_each_entry(adapter, &adapter_list, list) {
if (num_adapters == 0)
break;
for (k = 0; k < EHEA_MAX_PORTS; k++) {
struct ehea_port *port = adapter->port[k];
if (!port || (port->state != EHEA_PORT_UP) ||
(num_ports == 0))
continue;
for (l = 0; l < port->num_def_qps; l++) {
struct ehea_port_res *pr = &port->port_res[l];
arr[i].adh = adapter->handle;
arr[i++].fwh = pr->qp->fw_handle;
arr[i].adh = adapter->handle;
arr[i++].fwh = pr->send_cq->fw_handle;
arr[i].adh = adapter->handle;
arr[i++].fwh = pr->recv_cq->fw_handle;
arr[i].adh = adapter->handle;
arr[i++].fwh = pr->eq->fw_handle;
arr[i].adh = adapter->handle;
arr[i++].fwh = pr->send_mr.handle;
arr[i].adh = adapter->handle;
arr[i++].fwh = pr->recv_mr.handle;
}
arr[i].adh = adapter->handle;
arr[i++].fwh = port->qp_eq->fw_handle;
num_ports--;
}
arr[i].adh = adapter->handle;
arr[i++].fwh = adapter->neq->fw_handle;
if (adapter->mr.handle) {
arr[i].adh = adapter->handle;
arr[i++].fwh = adapter->mr.handle;
}
num_adapters--;
}
out_update:
kfree(ehea_fw_handles.arr);
ehea_fw_handles.arr = arr;
ehea_fw_handles.num_entries = i;
out:
mutex_unlock(&ehea_fw_handles.lock);
}
static void ehea_update_bcmc_registrations(void)
{
unsigned long flags;
struct ehea_bcmc_reg_entry *arr = NULL;
struct ehea_adapter *adapter;
struct ehea_mc_list *mc_entry;
int num_registrations = 0;
int i = 0;
int k;
spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
/* Determine number of registrations */
list_for_each_entry(adapter, &adapter_list, list)
for (k = 0; k < EHEA_MAX_PORTS; k++) {
struct ehea_port *port = adapter->port[k];
if (!port || (port->state != EHEA_PORT_UP))
continue;
num_registrations += 2; /* Broadcast registrations */
list_for_each_entry(mc_entry, &port->mc_list->list,list)
num_registrations += 2;
}
if (num_registrations) {
arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
if (!arr)
goto out; /* Keep the existing array */
} else
goto out_update;
list_for_each_entry(adapter, &adapter_list, list) {
for (k = 0; k < EHEA_MAX_PORTS; k++) {
struct ehea_port *port = adapter->port[k];
if (!port || (port->state != EHEA_PORT_UP))
continue;
if (num_registrations == 0)
goto out_update;
arr[i].adh = adapter->handle;
arr[i].port_id = port->logical_port_id;
arr[i].reg_type = EHEA_BCMC_BROADCAST |
EHEA_BCMC_UNTAGGED;
arr[i++].macaddr = port->mac_addr;
arr[i].adh = adapter->handle;
arr[i].port_id = port->logical_port_id;
arr[i].reg_type = EHEA_BCMC_BROADCAST |
EHEA_BCMC_VLANID_ALL;
arr[i++].macaddr = port->mac_addr;
num_registrations -= 2;
list_for_each_entry(mc_entry,
&port->mc_list->list, list) {
if (num_registrations == 0)
goto out_update;
arr[i].adh = adapter->handle;
arr[i].port_id = port->logical_port_id;
arr[i].reg_type = EHEA_BCMC_MULTICAST |
EHEA_BCMC_UNTAGGED;
if (mc_entry->macaddr == 0)
arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
arr[i++].macaddr = mc_entry->macaddr;
arr[i].adh = adapter->handle;
arr[i].port_id = port->logical_port_id;
arr[i].reg_type = EHEA_BCMC_MULTICAST |
EHEA_BCMC_VLANID_ALL;
if (mc_entry->macaddr == 0)
arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
arr[i++].macaddr = mc_entry->macaddr;
num_registrations -= 2;
}
}
}
out_update:
kfree(ehea_bcmc_regs.arr);
ehea_bcmc_regs.arr = arr;
ehea_bcmc_regs.num_entries = i;
out:
spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
}
static void ehea_get_stats64(struct net_device *dev,
struct rtnl_link_stats64 *stats)
{
struct ehea_port *port = netdev_priv(dev);
u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
int i;
for (i = 0; i < port->num_def_qps; i++) {
rx_packets += port->port_res[i].rx_packets;
rx_bytes += port->port_res[i].rx_bytes;
}
for (i = 0; i < port->num_def_qps; i++) {
tx_packets += port->port_res[i].tx_packets;
tx_bytes += port->port_res[i].tx_bytes;
}
stats->tx_packets = tx_packets;
stats->rx_bytes = rx_bytes;
stats->tx_bytes = tx_bytes;
stats->rx_packets = rx_packets;
stats->multicast = port->stats.multicast;
stats->rx_errors = port->stats.rx_errors;
}
static void ehea_update_stats(struct work_struct *work)
{
struct ehea_port *port =
container_of(work, struct ehea_port, stats_work.work);
struct net_device *dev = port->netdev;
struct rtnl_link_stats64 *stats = &port->stats;
struct hcp_ehea_port_cb2 *cb2;
u64 hret;
cb2 = (void *)get_zeroed_page(GFP_KERNEL);
if (!cb2) {
netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
goto resched;
}
hret = ehea_h_query_ehea_port(port->adapter->handle,
port->logical_port_id,
H_PORT_CB2, H_PORT_CB2_ALL, cb2);
if (hret != H_SUCCESS) {
netdev_err(dev, "query_ehea_port failed\n");
goto out_herr;
}
if (netif_msg_hw(port))
ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
stats->multicast = cb2->rxmcp;
stats->rx_errors = cb2->rxuerr;
out_herr:
free_page((unsigned long)cb2);
resched:
schedule_delayed_work(&port->stats_work,
round_jiffies_relative(msecs_to_jiffies(1000)));
}
static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
{
struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
struct net_device *dev = pr->port->netdev;
int max_index_mask = pr->rq1_skba.len - 1;
int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
int adder = 0;
int i;
pr->rq1_skba.os_skbs = 0;
if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
if (nr_of_wqes > 0)
pr->rq1_skba.index = index;
pr->rq1_skba.os_skbs = fill_wqes;
return;
}
for (i = 0; i < fill_wqes; i++) {
if (!skb_arr_rq1[index]) {
skb_arr_rq1[index] = netdev_alloc_skb(dev,
EHEA_L_PKT_SIZE);
if (!skb_arr_rq1[index]) {
pr->rq1_skba.os_skbs = fill_wqes - i;
break;
}
}
index--;
index &= max_index_mask;
adder++;
}
if (adder == 0)
return;
/* Ring doorbell */
ehea_update_rq1a(pr->qp, adder);
}
static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
{
struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
struct net_device *dev = pr->port->netdev;
int i;
if (nr_rq1a > pr->rq1_skba.len) {
netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
return;
}
for (i = 0; i < nr_rq1a; i++) {
skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
if (!skb_arr_rq1[i])
break;
}
/* Ring doorbell */
ehea_update_rq1a(pr->qp, i - 1);
}
static int ehea_refill_rq_def(struct ehea_port_res *pr,
struct ehea_q_skb_arr *q_skba, int rq_nr,
int num_wqes, int wqe_type, int packet_size)
{
struct net_device *dev = pr->port->netdev;
struct ehea_qp *qp = pr->qp;
struct sk_buff **skb_arr = q_skba->arr;
struct ehea_rwqe *rwqe;
int i, index, max_index_mask, fill_wqes;
int adder = 0;
int ret = 0;
fill_wqes = q_skba->os_skbs + num_wqes;
q_skba->os_skbs = 0;
if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
q_skba->os_skbs = fill_wqes;
return ret;
}
index = q_skba->index;
max_index_mask = q_skba->len - 1;
for (i = 0; i < fill_wqes; i++) {
u64 tmp_addr;
struct sk_buff *skb;
skb = netdev_alloc_skb_ip_align(dev, packet_size);
if (!skb) {
q_skba->os_skbs = fill_wqes - i;
if (q_skba->os_skbs == q_skba->len - 2) {
netdev_info(pr->port->netdev,
"rq%i ran dry - no mem for skb\n",
rq_nr);
ret = -ENOMEM;
}
break;
}
skb_arr[index] = skb;
tmp_addr = ehea_map_vaddr(skb->data);
if (tmp_addr == -1) {
dev_consume_skb_any(skb);
q_skba->os_skbs = fill_wqes - i;
ret = 0;
break;
}
rwqe = ehea_get_next_rwqe(qp, rq_nr);
rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
| EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
rwqe->sg_list[0].vaddr = tmp_addr;
rwqe->sg_list[0].len = packet_size;
rwqe->data_segments = 1;
index++;
index &= max_index_mask;
adder++;
}
q_skba->index = index;
if (adder == 0)
goto out;
/* Ring doorbell */
iosync();
if (rq_nr == 2)
ehea_update_rq2a(pr->qp, adder);
else
ehea_update_rq3a(pr->qp, adder);
out:
return ret;
}
static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
{
return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
nr_of_wqes, EHEA_RWQE2_TYPE,
EHEA_RQ2_PKT_SIZE);
}
static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
{
return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
nr_of_wqes, EHEA_RWQE3_TYPE,
EHEA_MAX_PACKET_SIZE);
}
static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
{
*rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
return 0;
if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
(cqe->header_length == 0))
return 0;
return -EINVAL;
}
static inline void ehea_fill_skb(struct net_device *dev,
struct sk_buff *skb, struct ehea_cqe *cqe,
struct ehea_port_res *pr)
{
int length = cqe->num_bytes_transfered - 4; /*remove CRC */
skb_put(skb, length);
skb->protocol = eth_type_trans(skb, dev);
/* The packet was not an IPV4 packet so a complemented checksum was
calculated. The value is found in the Internet Checksum field. */
if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
skb->ip_summed = CHECKSUM_COMPLETE;
skb->csum = csum_unfold(~cqe->inet_checksum_value);
} else
skb->ip_summed = CHECKSUM_UNNECESSARY;
skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
}
static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
int arr_len,
struct ehea_cqe *cqe)
{
int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
struct sk_buff *skb;
void *pref;
int x;
x = skb_index + 1;
x &= (arr_len - 1);
pref = skb_array[x];
if (pref) {
prefetchw(pref);
prefetchw(pref + EHEA_CACHE_LINE);
pref = (skb_array[x]->data);
prefetch(pref);
prefetch(pref + EHEA_CACHE_LINE);
prefetch(pref + EHEA_CACHE_LINE * 2);
prefetch(pref + EHEA_CACHE_LINE * 3);
}
skb = skb_array[skb_index];
skb_array[skb_index] = NULL;
return skb;
}
static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
int arr_len, int wqe_index)
{
struct sk_buff *skb;
void *pref;
int x;
x = wqe_index + 1;
x &= (arr_len - 1);
pref = skb_array[x];
if (pref) {
prefetchw(pref);
prefetchw(pref + EHEA_CACHE_LINE);
pref = (skb_array[x]->data);
prefetchw(pref);
prefetchw(pref + EHEA_CACHE_LINE);
}
skb = skb_array[wqe_index];
skb_array[wqe_index] = NULL;
return skb;
}
static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
struct ehea_cqe *cqe, int *processed_rq2,
int *processed_rq3)
{
struct sk_buff *skb;
if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
pr->p_stats.err_tcp_cksum++;
if (cqe->status & EHEA_CQE_STAT_ERR_IP)
pr->p_stats.err_ip_cksum++;
if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
pr->p_stats.err_frame_crc++;
if (rq == 2) {
*processed_rq2 += 1;
skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
dev_kfree_skb(skb);
} else if (rq == 3) {
*processed_rq3 += 1;
skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
dev_kfree_skb(skb);
}
if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
if (netif_msg_rx_err(pr->port)) {
pr_err("Critical receive error for QP %d. Resetting port.\n",
pr->qp->init_attr.qp_nr);
ehea_dump(cqe, sizeof(*cqe), "CQE");
}
ehea_schedule_port_reset(pr->port);
return 1;
}
return 0;
}
static int ehea_proc_rwqes(struct net_device *dev,
struct ehea_port_res *pr,
int budget)
{
struct ehea_port *port = pr->port;
struct ehea_qp *qp = pr->qp;
struct ehea_cqe *cqe;
struct sk_buff *skb;
struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
int skb_arr_rq1_len = pr->rq1_skba.len;
int skb_arr_rq2_len = pr->rq2_skba.len;
int skb_arr_rq3_len = pr->rq3_skba.len;
int processed, processed_rq1, processed_rq2, processed_rq3;
u64 processed_bytes = 0;
int wqe_index, last_wqe_index, rq, port_reset;
processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
last_wqe_index = 0;
cqe = ehea_poll_rq1(qp, &wqe_index);
while ((processed < budget) && cqe) {
ehea_inc_rq1(qp);
processed_rq1++;
processed++;
if (netif_msg_rx_status(port))
ehea_dump(cqe, sizeof(*cqe), "CQE");
last_wqe_index = wqe_index;
rmb();
if (!ehea_check_cqe(cqe, &rq)) {
if (rq == 1) {
/* LL RQ1 */
skb = get_skb_by_index_ll(skb_arr_rq1,
skb_arr_rq1_len,
wqe_index);
if (unlikely(!skb)) {
netif_info(port, rx_err, dev,
"LL rq1: skb=NULL\n");
skb = netdev_alloc_skb(dev,
EHEA_L_PKT_SIZE);
if (!skb)
break;
}
skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
cqe->num_bytes_transfered - 4);
ehea_fill_skb(dev, skb, cqe, pr);
} else if (rq == 2) {
/* RQ2 */
skb = get_skb_by_index(skb_arr_rq2,
skb_arr_rq2_len, cqe);
if (unlikely(!skb)) {
netif_err(port, rx_err, dev,
"rq2: skb=NULL\n");
break;
}
ehea_fill_skb(dev, skb, cqe, pr);
processed_rq2++;
} else {
/* RQ3 */
skb = get_skb_by_index(skb_arr_rq3,
skb_arr_rq3_len, cqe);
if (unlikely(!skb)) {
netif_err(port, rx_err, dev,
"rq3: skb=NULL\n");
break;
}
ehea_fill_skb(dev, skb, cqe, pr);
processed_rq3++;
}
processed_bytes += skb->len;
if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
cqe->vlan_tag);
napi_gro_receive(&pr->napi, skb);
} else {
pr->p_stats.poll_receive_errors++;
port_reset = ehea_treat_poll_error(pr, rq, cqe,
&processed_rq2,
&processed_rq3);
if (port_reset)
break;
}
cqe = ehea_poll_rq1(qp, &wqe_index);
}
pr->rx_packets += processed;
pr->rx_bytes += processed_bytes;
ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
ehea_refill_rq2(pr, processed_rq2);
ehea_refill_rq3(pr, processed_rq3);
return processed;
}
#define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
static void reset_sq_restart_flag(struct ehea_port *port)
{
int i;
for (i = 0; i < port->num_def_qps; i++) {
struct ehea_port_res *pr = &port->port_res[i];
pr->sq_restart_flag = 0;
}
wake_up(&port->restart_wq);
}
static void check_sqs(struct ehea_port *port)
{
struct ehea_swqe *swqe;
int swqe_index;
int i;
for (i = 0; i < port->num_def_qps; i++) {
struct ehea_port_res *pr = &port->port_res[i];
int ret;
swqe = ehea_get_swqe(pr->qp, &swqe_index);
memset(swqe, 0, SWQE_HEADER_SIZE);
atomic_dec(&pr->swqe_avail);
swqe->tx_control |= EHEA_SWQE_PURGE;
swqe->wr_id = SWQE_RESTART_CHECK;
swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
swqe->immediate_data_length = 80;
ehea_post_swqe(pr->qp, swqe);
ret = wait_event_timeout(port->restart_wq,
pr->sq_restart_flag == 0,
msecs_to_jiffies(100));
if (!ret) {
pr_err("HW/SW queues out of sync\n");
ehea_schedule_port_reset(pr->port);
return;
}
}
}
static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
{
struct sk_buff *skb;
struct ehea_cq *send_cq = pr->send_cq;
struct ehea_cqe *cqe;
int quota = my_quota;
int cqe_counter = 0;
int swqe_av = 0;
int index;
struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
pr - &pr->port->port_res[0]);
cqe = ehea_poll_cq(send_cq);
while (cqe && (quota > 0)) {
ehea_inc_cq(send_cq);
cqe_counter++;
rmb();
if (cqe->wr_id == SWQE_RESTART_CHECK) {
pr->sq_restart_flag = 1;
swqe_av++;
break;
}
if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
pr_err("Bad send completion status=0x%04X\n",
cqe->status);
if (netif_msg_tx_err(pr->port))
ehea_dump(cqe, sizeof(*cqe), "Send CQE");
if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
pr_err("Resetting port\n");
ehea_schedule_port_reset(pr->port);
break;
}
}
if (netif_msg_tx_done(pr->port))
ehea_dump(cqe, sizeof(*cqe), "CQE");
if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
== EHEA_SWQE2_TYPE)) {
index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
skb = pr->sq_skba.arr[index];
dev_consume_skb_any(skb);
pr->sq_skba.arr[index] = NULL;
}
swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
quota--;
cqe = ehea_poll_cq(send_cq);
}
ehea_update_feca(send_cq, cqe_counter);
atomic_add(swqe_av, &pr->swqe_avail);
if (unlikely(netif_tx_queue_stopped(txq) &&
(atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
__netif_tx_lock(txq, smp_processor_id());
if (netif_tx_queue_stopped(txq) &&
(atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
netif_tx_wake_queue(txq);
__netif_tx_unlock(txq);
}
wake_up(&pr->port->swqe_avail_wq);
return cqe;
}
#define EHEA_POLL_MAX_CQES 65535
static int ehea_poll(struct napi_struct *napi, int budget)
{
struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
napi);
struct net_device *dev = pr->port->netdev;
struct ehea_cqe *cqe;
struct ehea_cqe *cqe_skb = NULL;
int wqe_index;
int rx = 0;
cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
rx += ehea_proc_rwqes(dev, pr, budget - rx);
while (rx != budget) {
napi_complete(napi);
ehea_reset_cq_ep(pr->recv_cq);
ehea_reset_cq_ep(pr->send_cq);
ehea_reset_cq_n1(pr->recv_cq);
ehea_reset_cq_n1(pr->send_cq);
rmb();
cqe = ehea_poll_rq1(pr->qp, &wqe_index);
cqe_skb = ehea_poll_cq(pr->send_cq);
if (!cqe && !cqe_skb)
return rx;
if (!napi_schedule(napi))
return rx;
cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
rx += ehea_proc_rwqes(dev, pr, budget - rx);
}
return rx;
}
static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
{
struct ehea_port_res *pr = param;
napi_schedule(&pr->napi);
return IRQ_HANDLED;
}
static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
{
struct ehea_port *port = param;
struct ehea_eqe *eqe;
struct ehea_qp *qp;
u32 qp_token;
u64 resource_type, aer, aerr;
int reset_port = 0;
eqe = ehea_poll_eq(port->qp_eq);
while (eqe) {
qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
eqe->entry, qp_token);
qp = port->port_res[qp_token].qp;
resource_type = ehea_error_data(port->adapter, qp->fw_handle,
&aer, &aerr);
if (resource_type == EHEA_AER_RESTYPE_QP) {
if ((aer & EHEA_AER_RESET_MASK) ||
(aerr & EHEA_AERR_RESET_MASK))
reset_port = 1;
} else
reset_port = 1; /* Reset in case of CQ or EQ error */
eqe = ehea_poll_eq(port->qp_eq);
}
if (reset_port) {
pr_err("Resetting port\n");
ehea_schedule_port_reset(port);
}
return IRQ_HANDLED;
}
static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
int logical_port)
{
int i;
for (i = 0; i < EHEA_MAX_PORTS; i++)
if (adapter->port[i])
if (adapter->port[i]->logical_port_id == logical_port)
return adapter->port[i];
return NULL;
}
int ehea_sense_port_attr(struct ehea_port *port)
{
int ret;
u64 hret;
struct hcp_ehea_port_cb0 *cb0;
/* may be called via ehea_neq_tasklet() */
cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
if (!cb0) {
pr_err("no mem for cb0\n");
ret = -ENOMEM;
goto out;
}
hret = ehea_h_query_ehea_port(port->adapter->handle,
port->logical_port_id, H_PORT_CB0,
EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
cb0);
if (hret != H_SUCCESS) {
ret = -EIO;
goto out_free;
}
/* MAC address */
port->mac_addr = cb0->port_mac_addr << 16;
if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
ret = -EADDRNOTAVAIL;
goto out_free;
}
/* Port speed */
switch (cb0->port_speed) {
case H_SPEED_10M_H:
port->port_speed = EHEA_SPEED_10M;
port->full_duplex = 0;
break;
case H_SPEED_10M_F:
port->port_speed = EHEA_SPEED_10M;
port->full_duplex = 1;
break;
case H_SPEED_100M_H:
port->port_speed = EHEA_SPEED_100M;
port->full_duplex = 0;
break;
case H_SPEED_100M_F:
port->port_speed = EHEA_SPEED_100M;
port->full_duplex = 1;
break;
case H_SPEED_1G_F:
port->port_speed = EHEA_SPEED_1G;
port->full_duplex = 1;
break;
case H_SPEED_10G_F:
port->port_speed = EHEA_SPEED_10G;
port->full_duplex = 1;
break;
default:
port->port_speed = 0;
port->full_duplex = 0;
break;
}
port->autoneg = 1;
port->num_mcs = cb0->num_default_qps;
/* Number of default QPs */
if (use_mcs)
port->num_def_qps = cb0->num_default_qps;
else
port->num_def_qps = 1;
if (!port->num_def_qps) {
ret = -EINVAL;
goto out_free;
}
ret = 0;
out_free:
if (ret || netif_msg_probe(port))
ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
free_page((unsigned long)cb0);
out:
return ret;
}
int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
{
struct hcp_ehea_port_cb4 *cb4;
u64 hret;
int ret = 0;
cb4 = (void *)get_zeroed_page(GFP_KERNEL);
if (!cb4) {
pr_err("no mem for cb4\n");
ret = -ENOMEM;
goto out;
}
cb4->port_speed = port_speed;
netif_carrier_off(port->netdev);
hret = ehea_h_modify_ehea_port(port->adapter->handle,
port->logical_port_id,
H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
if (hret == H_SUCCESS) {
port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
hret = ehea_h_query_ehea_port(port->adapter->handle,
port->logical_port_id,
H_PORT_CB4, H_PORT_CB4_SPEED,
cb4);
if (hret == H_SUCCESS) {
switch (cb4->port_speed) {
case H_SPEED_10M_H:
port->port_speed = EHEA_SPEED_10M;
port->full_duplex = 0;
break;
case H_SPEED_10M_F:
port->port_speed = EHEA_SPEED_10M;
port->full_duplex = 1;
break;
case H_SPEED_100M_H:
port->port_speed = EHEA_SPEED_100M;
port->full_duplex = 0;
break;
case H_SPEED_100M_F:
port->port_speed = EHEA_SPEED_100M;
port->full_duplex = 1;
break;
case H_SPEED_1G_F:
port->port_speed = EHEA_SPEED_1G;
port->full_duplex = 1;
break;
case H_SPEED_10G_F:
port->port_speed = EHEA_SPEED_10G;
port->full_duplex = 1;
break;
default:
port->port_speed = 0;
port->full_duplex = 0;
break;
}
} else {
pr_err("Failed sensing port speed\n");
ret = -EIO;
}
} else {
if (hret == H_AUTHORITY) {
pr_info("Hypervisor denied setting port speed\n");
ret = -EPERM;
} else {
ret = -EIO;
pr_err("Failed setting port speed\n");
}
}
if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
netif_carrier_on(port->netdev);
free_page((unsigned long)cb4);
out:
return ret;
}
static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
{
int ret;
u8 ec;
u8 portnum;
struct ehea_port *port;
struct net_device *dev;
ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
port = ehea_get_port(adapter, portnum);
if (!port) {
netdev_err(NULL, "unknown portnum %x\n", portnum);
return;
}
dev = port->netdev;
switch (ec) {
case EHEA_EC_PORTSTATE_CHG: /* port state change */
if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
if (!netif_carrier_ok(dev)) {
ret = ehea_sense_port_attr(port);
if (ret) {
netdev_err(dev, "failed resensing port attributes\n");
break;
}
netif_info(port, link, dev,
"Logical port up: %dMbps %s Duplex\n",
port->port_speed,
port->full_duplex == 1 ?
"Full" : "Half");
netif_carrier_on(dev);
netif_wake_queue(dev);
}
} else
if (netif_carrier_ok(dev)) {
netif_info(port, link, dev,
"Logical port down\n");
netif_carrier_off(dev);
netif_tx_disable(dev);
}
if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
port->phy_link = EHEA_PHY_LINK_UP;
netif_info(port, link, dev,
"Physical port up\n");
if (prop_carrier_state)
netif_carrier_on(dev);
} else {
port->phy_link = EHEA_PHY_LINK_DOWN;
netif_info(port, link, dev,
"Physical port down\n");
if (prop_carrier_state)
netif_carrier_off(dev);
}
if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
netdev_info(dev,
"External switch port is primary port\n");
else
netdev_info(dev,
"External switch port is backup port\n");
break;
case EHEA_EC_ADAPTER_MALFUNC:
netdev_err(dev, "Adapter malfunction\n");
break;
case EHEA_EC_PORT_MALFUNC:
netdev_info(dev, "Port malfunction\n");
netif_carrier_off(dev);
netif_tx_disable(dev);
break;
default:
netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
break;
}
}
static void ehea_neq_tasklet(struct tasklet_struct *t)
{
struct ehea_adapter *adapter = from_tasklet(adapter, t, neq_tasklet);
struct ehea_eqe *eqe;
u64 event_mask;
eqe = ehea_poll_eq(adapter->neq);
pr_debug("eqe=%p\n", eqe);
while (eqe) {
pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
ehea_parse_eqe(adapter, eqe->entry);
eqe = ehea_poll_eq(adapter->neq);
pr_debug("next eqe=%p\n", eqe);
}
event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
| EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
| EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
ehea_h_reset_events(adapter->handle,
adapter->neq->fw_handle, event_mask);
}
static irqreturn_t ehea_interrupt_neq(int irq, void *param)
{
struct ehea_adapter *adapter = param;
tasklet_hi_schedule(&adapter->neq_tasklet);
return IRQ_HANDLED;
}
static int ehea_fill_port_res(struct ehea_port_res *pr)
{
int ret;
struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
ehea_init_fill_rq1(pr, pr->rq1_skba.len);
ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
return ret;
}
static int ehea_reg_interrupts(struct net_device *dev)
{
struct ehea_port *port = netdev_priv(dev);
struct ehea_port_res *pr;
int i, ret;
snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
dev->name);
ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
ehea_qp_aff_irq_handler,
0, port->int_aff_name, port);
if (ret) {
netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
port->qp_eq->attr.ist1);
goto out_free_qpeq;
}
netif_info(port, ifup, dev,
"irq_handle 0x%X for function qp_aff_irq_handler registered\n",
port->qp_eq->attr.ist1);
for (i = 0; i < port->num_def_qps; i++) {
pr = &port->port_res[i];
snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
"%s-queue%d", dev->name, i);
ret = ibmebus_request_irq(pr->eq->attr.ist1,
ehea_recv_irq_handler,
0, pr->int_send_name, pr);
if (ret) {
netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
i, pr->eq->attr.ist1);
goto out_free_req;
}
netif_info(port, ifup, dev,
"irq_handle 0x%X for function ehea_queue_int %d registered\n",
pr->eq->attr.ist1, i);
}
out:
return ret;
out_free_req:
while (--i >= 0) {
u32 ist = port->port_res[i].eq->attr.ist1;
ibmebus_free_irq(ist, &port->port_res[i]);
}
out_free_qpeq:
ibmebus_free_irq(port->qp_eq->attr.ist1, port);
i = port->num_def_qps;
goto out;
}
static void ehea_free_interrupts(struct net_device *dev)
{
struct ehea_port *port = netdev_priv(dev);
struct ehea_port_res *pr;
int i;
/* send */
for (i = 0; i < port->num_def_qps; i++) {
pr = &port->port_res[i];
ibmebus_free_irq(pr->eq->attr.ist1, pr);
netif_info(port, intr, dev,
"free send irq for res %d with handle 0x%X\n",
i, pr->eq->attr.ist1);
}
/* associated events */
ibmebus_free_irq(port->qp_eq->attr.ist1, port);
netif_info(port, intr, dev,
"associated event interrupt for handle 0x%X freed\n",
port->qp_eq->attr.ist1);
}
static int ehea_configure_port(struct ehea_port *port)
{
int ret, i;
u64 hret, mask;
struct hcp_ehea_port_cb0 *cb0;
ret = -ENOMEM;
cb0 = (void *)get_zeroed_page(GFP_KERNEL);
if (!cb0)
goto out;
cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
| EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
| EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
| EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
| EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
PXLY_RC_VLAN_FILTER)
| EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
for (i = 0; i < port->num_mcs; i++)
if (use_mcs)
cb0->default_qpn_arr[i] =
port->port_res[i].qp->init_attr.qp_nr;
else
cb0->default_qpn_arr[i] =
port->port_res[0].qp->init_attr.qp_nr;
if (netif_msg_ifup(port))
ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
| EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
hret = ehea_h_modify_ehea_port(port->adapter->handle,
port->logical_port_id,
H_PORT_CB0, mask, cb0);
ret = -EIO;
if (hret != H_SUCCESS)
goto out_free;
ret = 0;
out_free:
free_page((unsigned long)cb0);
out:
return ret;
}
static int ehea_gen_smrs(struct ehea_port_res *pr)
{
int ret;
struct ehea_adapter *adapter = pr->port->adapter;
ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
if (ret)
goto out;
ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
if (ret)
goto out_free;
return 0;
out_free:
ehea_rem_mr(&pr->send_mr);
out:
pr_err("Generating SMRS failed\n");
return -EIO;
}
static int ehea_rem_smrs(struct ehea_port_res *pr)
{
if ((ehea_rem_mr(&pr->send_mr)) ||
(ehea_rem_mr(&pr->recv_mr)))
return -EIO;
else
return 0;
}
static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
{
int arr_size = sizeof(void *) * max_q_entries;
q_skba->arr = vzalloc(arr_size);
if (!q_skba->arr)
return -ENOMEM;
q_skba->len = max_q_entries;
q_skba->index = 0;
q_skba->os_skbs = 0;
return 0;
}
static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
struct port_res_cfg *pr_cfg, int queue_token)
{
struct ehea_adapter *adapter = port->adapter;
enum ehea_eq_type eq_type = EHEA_EQ;
struct ehea_qp_init_attr *init_attr = NULL;
int ret = -EIO;
u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
tx_bytes = pr->tx_bytes;
tx_packets = pr->tx_packets;
rx_bytes = pr->rx_bytes;
rx_packets = pr->rx_packets;
memset(pr, 0, sizeof(struct ehea_port_res));
pr->tx_bytes = tx_bytes;
pr->tx_packets = tx_packets;
pr->rx_bytes = rx_bytes;
pr->rx_packets = rx_packets;
pr->port = port;
pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
if (!pr->eq) {
pr_err("create_eq failed (eq)\n");
goto out_free;
}
pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
pr->eq->fw_handle,
port->logical_port_id);
if (!pr->recv_cq) {
pr_err("create_cq failed (cq_recv)\n");
goto out_free;
}
pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
pr->eq->fw_handle,
port->logical_port_id);
if (!pr->send_cq) {
pr_err("create_cq failed (cq_send)\n");
goto out_free;
}
if (netif_msg_ifup(port))
pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
pr->send_cq->attr.act_nr_of_cqes,
pr->recv_cq->attr.act_nr_of_cqes);
init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
if (!init_attr) {
ret = -ENOMEM;
pr_err("no mem for ehea_qp_init_attr\n");
goto out_free;
}
init_attr->low_lat_rq1 = 1;
init_attr->signalingtype = 1; /* generate CQE if specified in WQE */
init_attr->rq_count = 3;
init_attr->qp_token = queue_token;
init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
init_attr->port_nr = port->logical_port_id;
init_attr->send_cq_handle = pr->send_cq->fw_handle;
init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
init_attr->aff_eq_handle = port->qp_eq->fw_handle;
pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
if (!pr->qp) {
pr_err("create_qp failed\n");
ret = -EIO;
goto out_free;
}
if (netif_msg_ifup(port))
pr_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d\n",
init_attr->qp_nr,
init_attr->act_nr_send_wqes,
init_attr->act_nr_rwqes_rq1,
init_attr->act_nr_rwqes_rq2,
init_attr->act_nr_rwqes_rq3);
pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
if (ret)
goto out_free;
pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
if (ehea_gen_smrs(pr) != 0) {
ret = -EIO;
goto out_free;
}
atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
kfree(init_attr);
netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll);
ret = 0;
goto out;
out_free:
kfree(init_attr);
vfree(pr->sq_skba.arr);
vfree(pr->rq1_skba.arr);
vfree(pr->rq2_skba.arr);
vfree(pr->rq3_skba.arr);
ehea_destroy_qp(pr->qp);
ehea_destroy_cq(pr->send_cq);
ehea_destroy_cq(pr->recv_cq);
ehea_destroy_eq(pr->eq);
out:
return ret;
}
static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
{
int ret, i;
if (pr->qp)
netif_napi_del(&pr->napi);
ret = ehea_destroy_qp(pr->qp);
if (!ret) {
ehea_destroy_cq(pr->send_cq);
ehea_destroy_cq(pr->recv_cq);
ehea_destroy_eq(pr->eq);
for (i = 0; i < pr->rq1_skba.len; i++)
dev_kfree_skb(pr->rq1_skba.arr[i]);
for (i = 0; i < pr->rq2_skba.len; i++)
dev_kfree_skb(pr->rq2_skba.arr[i]);
for (i = 0; i < pr->rq3_skba.len; i++)
dev_kfree_skb(pr->rq3_skba.arr[i]);
for (i = 0; i < pr->sq_skba.len; i++)
dev_kfree_skb(pr->sq_skba.arr[i]);
vfree(pr->rq1_skba.arr);
vfree(pr->rq2_skba.arr);
vfree(pr->rq3_skba.arr);
vfree(pr->sq_skba.arr);
ret = ehea_rem_smrs(pr);
}
return ret;
}
static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
u32 lkey)
{
int skb_data_size = skb_headlen(skb);
u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
unsigned int immediate_len = SWQE2_MAX_IMM;
swqe->descriptors = 0;
if (skb_is_gso(skb)) {
swqe->tx_control |= EHEA_SWQE_TSO;
swqe->mss = skb_shinfo(skb)->gso_size;
/*
* For TSO packets we only copy the headers into the
* immediate area.
*/
immediate_len = skb_tcp_all_headers(skb);
}
if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
skb_copy_from_linear_data(skb, imm_data, immediate_len);
swqe->immediate_data_length = immediate_len;
if (skb_data_size > immediate_len) {
sg1entry->l_key = lkey;
sg1entry->len = skb_data_size - immediate_len;
sg1entry->vaddr =
ehea_map_vaddr(skb->data + immediate_len);
swqe->descriptors++;
}
} else {
skb_copy_from_linear_data(skb, imm_data, skb_data_size);
swqe->immediate_data_length = skb_data_size;
}
}
static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
struct ehea_swqe *swqe, u32 lkey)
{
struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
skb_frag_t *frag;
int nfrags, sg1entry_contains_frag_data, i;
nfrags = skb_shinfo(skb)->nr_frags;
sg1entry = &swqe->u.immdata_desc.sg_entry;
sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
sg1entry_contains_frag_data = 0;
write_swqe2_immediate(skb, swqe, lkey);
/* write descriptors */
if (nfrags > 0) {
if (swqe->descriptors == 0) {
/* sg1entry not yet used */
frag = &skb_shinfo(skb)->frags[0];
/* copy sg1entry data */
sg1entry->l_key = lkey;
sg1entry->len = skb_frag_size(frag);
sg1entry->vaddr =
ehea_map_vaddr(skb_frag_address(frag));
swqe->descriptors++;
sg1entry_contains_frag_data = 1;
}
for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
frag = &skb_shinfo(skb)->frags[i];
sgentry = &sg_list[i - sg1entry_contains_frag_data];
sgentry->l_key = lkey;
sgentry->len = skb_frag_size(frag);
sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
swqe->descriptors++;
}
}
}
static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
{
int ret = 0;
u64 hret;
u8 reg_type;
/* De/Register untagged packets */
reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
port->logical_port_id,
reg_type, port->mac_addr, 0, hcallid);
if (hret != H_SUCCESS) {
pr_err("%sregistering bc address failed (tagged)\n",
hcallid == H_REG_BCMC ? "" : "de");
ret = -EIO;
goto out_herr;
}
/* De/Register VLAN packets */
reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
port->logical_port_id,
reg_type, port->mac_addr, 0, hcallid);
if (hret != H_SUCCESS) {
pr_err("%sregistering bc address failed (vlan)\n",
hcallid == H_REG_BCMC ? "" : "de");
ret = -EIO;
}
out_herr:
return ret;
}
static int ehea_set_mac_addr(struct net_device *dev, void *sa)
{
struct ehea_port *port = netdev_priv(dev);
struct sockaddr *mac_addr = sa;
struct hcp_ehea_port_cb0 *cb0;
int ret;
u64 hret;
if (!is_valid_ether_addr(mac_addr->sa_data)) {
ret = -EADDRNOTAVAIL;
goto out;
}
cb0 = (void *)get_zeroed_page(GFP_KERNEL);
if (!cb0) {
pr_err("no mem for cb0\n");
ret = -ENOMEM;
goto out;
}
memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
cb0->port_mac_addr = cb0->port_mac_addr >> 16;
hret = ehea_h_modify_ehea_port(port->adapter->handle,
port->logical_port_id, H_PORT_CB0,
EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
if (hret != H_SUCCESS) {
ret = -EIO;
goto out_free;
}
eth_hw_addr_set(dev, mac_addr->sa_data);
/* Deregister old MAC in pHYP */
if (port->state == EHEA_PORT_UP) {
ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
if (ret)
goto out_upregs;
}
port->mac_addr = cb0->port_mac_addr << 16;
/* Register new MAC in pHYP */
if (port->state == EHEA_PORT_UP) {
ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
if (ret)
goto out_upregs;
}
ret = 0;
out_upregs:
ehea_update_bcmc_registrations();
out_free:
free_page((unsigned long)cb0);
out:
return ret;
}
static void ehea_promiscuous_error(u64 hret, int enable)
{
if (hret == H_AUTHORITY)
pr_info("Hypervisor denied %sabling promiscuous mode\n",
enable == 1 ? "en" : "dis");
else
pr_err("failed %sabling promiscuous mode\n",
enable == 1 ? "en" : "dis");
}
static void ehea_promiscuous(struct net_device *dev, int enable)
{
struct ehea_port *port = netdev_priv(dev);
struct hcp_ehea_port_cb7 *cb7;
u64 hret;
if (enable == port->promisc)
return;
cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
if (!cb7) {
pr_err("no mem for cb7\n");
goto out;
}
/* Modify Pxs_DUCQPN in CB7 */
cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
hret = ehea_h_modify_ehea_port(port->adapter->handle,
port->logical_port_id,
H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
if (hret) {
ehea_promiscuous_error(hret, enable);
goto out;
}
port->promisc = enable;
out:
free_page((unsigned long)cb7);
}
static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
u32 hcallid)
{
u64 hret;
u8 reg_type;
reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
if (mc_mac_addr == 0)
reg_type |= EHEA_BCMC_SCOPE_ALL;
hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
port->logical_port_id,
reg_type, mc_mac_addr, 0, hcallid);
if (hret)
goto out;
reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
if (mc_mac_addr == 0)
reg_type |= EHEA_BCMC_SCOPE_ALL;
hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
port->logical_port_id,
reg_type, mc_mac_addr, 0, hcallid);
out:
return hret;
}
static int ehea_drop_multicast_list(struct net_device *dev)
{
struct ehea_port *port = netdev_priv(dev);
struct ehea_mc_list *mc_entry = port->mc_list;
struct list_head *pos;
struct list_head *temp;
int ret = 0;
u64 hret;
list_for_each_safe(pos, temp, &(port->mc_list->list)) {
mc_entry = list_entry(pos, struct ehea_mc_list, list);
hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
H_DEREG_BCMC);
if (hret) {
pr_err("failed deregistering mcast MAC\n");
ret = -EIO;
}
list_del(pos);
kfree(mc_entry);
}
return ret;
}
static void ehea_allmulti(struct net_device *dev, int enable)
{
struct ehea_port *port = netdev_priv(dev);
u64 hret;
if (!port->allmulti) {
if (enable) {
/* Enable ALLMULTI */
ehea_drop_multicast_list(dev);
hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
if (!hret)
port->allmulti = 1;
else
netdev_err(dev,
"failed enabling IFF_ALLMULTI\n");
}
} else {
if (!enable) {
/* Disable ALLMULTI */
hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
if (!hret)
port->allmulti = 0;
else
netdev_err(dev,
"failed disabling IFF_ALLMULTI\n");
}
}
}
static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
{
struct ehea_mc_list *ehea_mcl_entry;
u64 hret;
ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
if (!ehea_mcl_entry)
return;
INIT_LIST_HEAD(&ehea_mcl_entry->list);
memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
H_REG_BCMC);
if (!hret)
list_add(&ehea_mcl_entry->list, &port->mc_list->list);
else {
pr_err("failed registering mcast MAC\n");
kfree(ehea_mcl_entry);
}
}
static void ehea_set_multicast_list(struct net_device *dev)
{
struct ehea_port *port = netdev_priv(dev);
struct netdev_hw_addr *ha;
int ret;
ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
if (dev->flags & IFF_ALLMULTI) {
ehea_allmulti(dev, 1);
goto out;
}
ehea_allmulti(dev, 0);
if (!netdev_mc_empty(dev)) {
ret = ehea_drop_multicast_list(dev);
if (ret) {
/* Dropping the current multicast list failed.
* Enabling ALL_MULTI is the best we can do.
*/
ehea_allmulti(dev, 1);
}
if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
port->adapter->max_mc_mac);
goto out;
}
netdev_for_each_mc_addr(ha, dev)
ehea_add_multicast_entry(port, ha->addr);
}
out:
ehea_update_bcmc_registrations();
}
static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
{
swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
if (vlan_get_protocol(skb) != htons(ETH_P_IP))
return;
if (skb->ip_summed == CHECKSUM_PARTIAL)
swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
swqe->ip_start = skb_network_offset(skb);
swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
switch (ip_hdr(skb)->protocol) {
case IPPROTO_UDP:
if (skb->ip_summed == CHECKSUM_PARTIAL)
swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
swqe->tcp_offset = swqe->ip_end + 1 +
offsetof(struct udphdr, check);
break;
case IPPROTO_TCP:
if (skb->ip_summed == CHECKSUM_PARTIAL)
swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
swqe->tcp_offset = swqe->ip_end + 1 +
offsetof(struct tcphdr, check);
break;
}
}
static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
struct ehea_swqe *swqe, u32 lkey)
{
swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
xmit_common(skb, swqe);
write_swqe2_data(skb, dev, swqe, lkey);
}
static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
struct ehea_swqe *swqe)
{
u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
xmit_common(skb, swqe);
if (!skb->data_len)
skb_copy_from_linear_data(skb, imm_data, skb->len);
else
skb_copy_bits(skb, 0, imm_data, skb->len);
swqe->immediate_data_length = skb->len;
dev_consume_skb_any(skb);
}
static netdev_tx_t ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct ehea_port *port = netdev_priv(dev);
struct ehea_swqe *swqe;
u32 lkey;
int swqe_index;
struct ehea_port_res *pr;
struct netdev_queue *txq;
pr = &port->port_res[skb_get_queue_mapping(skb)];
txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
swqe = ehea_get_swqe(pr->qp, &swqe_index);
memset(swqe, 0, SWQE_HEADER_SIZE);
atomic_dec(&pr->swqe_avail);
if (skb_vlan_tag_present(skb)) {
swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
swqe->vlan_tag = skb_vlan_tag_get(skb);
}
pr->tx_packets++;
pr->tx_bytes += skb->len;
if (skb->len <= SWQE3_MAX_IMM) {
u32 sig_iv = port->sig_comp_iv;
u32 swqe_num = pr->swqe_id_counter;
ehea_xmit3(skb, dev, swqe);
swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
| EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
if (pr->swqe_ll_count >= (sig_iv - 1)) {
swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
sig_iv);
swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
pr->swqe_ll_count = 0;
} else
pr->swqe_ll_count += 1;
} else {
swqe->wr_id =
EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
| EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
| EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
| EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
pr->sq_skba.arr[pr->sq_skba.index] = skb;
pr->sq_skba.index++;
pr->sq_skba.index &= (pr->sq_skba.len - 1);
lkey = pr->send_mr.lkey;
ehea_xmit2(skb, dev, swqe, lkey);
swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
}
pr->swqe_id_counter += 1;
netif_info(port, tx_queued, dev,
"post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
if (netif_msg_tx_queued(port))
ehea_dump(swqe, 512, "swqe");
if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
netif_tx_stop_queue(txq);
swqe->tx_control |= EHEA_SWQE_PURGE;
}
ehea_post_swqe(pr->qp, swqe);
if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
pr->p_stats.queue_stopped++;
netif_tx_stop_queue(txq);
}
return NETDEV_TX_OK;
}
static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
{
struct ehea_port *port = netdev_priv(dev);
struct ehea_adapter *adapter = port->adapter;
struct hcp_ehea_port_cb1 *cb1;
int index;
u64 hret;
int err = 0;
cb1 = (void *)get_zeroed_page(GFP_KERNEL);
if (!cb1) {
pr_err("no mem for cb1\n");
err = -ENOMEM;
goto out;
}
hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
H_PORT_CB1, H_PORT_CB1_ALL, cb1);
if (hret != H_SUCCESS) {
pr_err("query_ehea_port failed\n");
err = -EINVAL;
goto out;
}
index = (vid / 64);
cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
H_PORT_CB1, H_PORT_CB1_ALL, cb1);
if (hret != H_SUCCESS) {
pr_err("modify_ehea_port failed\n");
err = -EINVAL;
}
out:
free_page((unsigned long)cb1);
return err;
}
static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
{
struct ehea_port *port = netdev_priv(dev);
struct ehea_adapter *adapter = port->adapter;
struct hcp_ehea_port_cb1 *cb1;
int index;
u64 hret;
int err = 0;
cb1 = (void *)get_zeroed_page(GFP_KERNEL);
if (!cb1) {
pr_err("no mem for cb1\n");
err = -ENOMEM;
goto out;
}
hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
H_PORT_CB1, H_PORT_CB1_ALL, cb1);
if (hret != H_SUCCESS) {
pr_err("query_ehea_port failed\n");
err = -EINVAL;
goto out;
}
index = (vid / 64);
cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
H_PORT_CB1, H_PORT_CB1_ALL, cb1);
if (hret != H_SUCCESS) {
pr_err("modify_ehea_port failed\n");
err = -EINVAL;
}
out:
free_page((unsigned long)cb1);
return err;
}
static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
{
int ret = -EIO;
u64 hret;
u16 dummy16 = 0;
u64 dummy64 = 0;
struct hcp_modify_qp_cb0 *cb0;
cb0 = (void *)get_zeroed_page(GFP_KERNEL);
if (!cb0) {
ret = -ENOMEM;
goto out;
}
hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
if (hret != H_SUCCESS) {
pr_err("query_ehea_qp failed (1)\n");
goto out;
}
cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
&dummy64, &dummy64, &dummy16, &dummy16);
if (hret != H_SUCCESS) {
pr_err("modify_ehea_qp failed (1)\n");
goto out;
}
hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
if (hret != H_SUCCESS) {
pr_err("query_ehea_qp failed (2)\n");
goto out;
}
cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
&dummy64, &dummy64, &dummy16, &dummy16);
if (hret != H_SUCCESS) {
pr_err("modify_ehea_qp failed (2)\n");
goto out;
}
hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
if (hret != H_SUCCESS) {
pr_err("query_ehea_qp failed (3)\n");
goto out;
}
cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
&dummy64, &dummy64, &dummy16, &dummy16);
if (hret != H_SUCCESS) {
pr_err("modify_ehea_qp failed (3)\n");
goto out;
}
hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
if (hret != H_SUCCESS) {
pr_err("query_ehea_qp failed (4)\n");
goto out;
}
ret = 0;
out:
free_page((unsigned long)cb0);
return ret;
}
static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
{
int ret, i;
struct port_res_cfg pr_cfg, pr_cfg_small_rx;
enum ehea_eq_type eq_type = EHEA_EQ;
port->qp_eq = ehea_create_eq(port->adapter, eq_type,
EHEA_MAX_ENTRIES_EQ, 1);
if (!port->qp_eq) {
ret = -EINVAL;
pr_err("ehea_create_eq failed (qp_eq)\n");
goto out_kill_eq;
}
pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
pr_cfg.max_entries_scq = sq_entries * 2;
pr_cfg.max_entries_sq = sq_entries;
pr_cfg.max_entries_rq1 = rq1_entries;
pr_cfg.max_entries_rq2 = rq2_entries;
pr_cfg.max_entries_rq3 = rq3_entries;
pr_cfg_small_rx.max_entries_rcq = 1;
pr_cfg_small_rx.max_entries_scq = sq_entries;
pr_cfg_small_rx.max_entries_sq = sq_entries;
pr_cfg_small_rx.max_entries_rq1 = 1;
pr_cfg_small_rx.max_entries_rq2 = 1;
pr_cfg_small_rx.max_entries_rq3 = 1;
for (i = 0; i < def_qps; i++) {
ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
if (ret)
goto out_clean_pr;
}
for (i = def_qps; i < def_qps; i++) {
ret = ehea_init_port_res(port, &port->port_res[i],
&pr_cfg_small_rx, i);
if (ret)
goto out_clean_pr;
}
return 0;
out_clean_pr:
while (--i >= 0)
ehea_clean_portres(port, &port->port_res[i]);
out_kill_eq:
ehea_destroy_eq(port->qp_eq);
return ret;
}
static int ehea_clean_all_portres(struct ehea_port *port)
{
int ret = 0;
int i;
for (i = 0; i < port->num_def_qps; i++)
ret |= ehea_clean_portres(port, &port->port_res[i]);
ret |= ehea_destroy_eq(port->qp_eq);
return ret;
}
static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
{
if (adapter->active_ports)
return;
ehea_rem_mr(&adapter->mr);
}
static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
{
if (adapter->active_ports)
return 0;
return ehea_reg_kernel_mr(adapter, &adapter->mr);
}
static int ehea_up(struct net_device *dev)
{
int ret, i;
struct ehea_port *port = netdev_priv(dev);
if (port->state == EHEA_PORT_UP)
return 0;
ret = ehea_port_res_setup(port, port->num_def_qps);
if (ret) {
netdev_err(dev, "port_res_failed\n");
goto out;
}
/* Set default QP for this port */
ret = ehea_configure_port(port);
if (ret) {
netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
goto out_clean_pr;
}
ret = ehea_reg_interrupts(dev);
if (ret) {
netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
goto out_clean_pr;
}
for (i = 0; i < port->num_def_qps; i++) {
ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
if (ret) {
netdev_err(dev, "activate_qp failed\n");
goto out_free_irqs;
}
}
for (i = 0; i < port->num_def_qps; i++) {
ret = ehea_fill_port_res(&port->port_res[i]);
if (ret) {
netdev_err(dev, "out_free_irqs\n");
goto out_free_irqs;
}
}
ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
if (ret) {
ret = -EIO;
goto out_free_irqs;
}
port->state = EHEA_PORT_UP;
ret = 0;
goto out;
out_free_irqs:
ehea_free_interrupts(dev);
out_clean_pr:
ehea_clean_all_portres(port);
out:
if (ret)
netdev_info(dev, "Failed starting. ret=%i\n", ret);
ehea_update_bcmc_registrations();
ehea_update_firmware_handles();
return ret;
}
static void port_napi_disable(struct ehea_port *port)
{
int i;
for (i = 0; i < port->num_def_qps; i++)
napi_disable(&port->port_res[i].napi);
}
static void port_napi_enable(struct ehea_port *port)
{
int i;
for (i = 0; i < port->num_def_qps; i++)
napi_enable(&port->port_res[i].napi);
}
static int ehea_open(struct net_device *dev)
{
int ret;
struct ehea_port *port = netdev_priv(dev);
mutex_lock(&port->port_lock);
netif_info(port, ifup, dev, "enabling port\n");
netif_carrier_off(dev);
ret = ehea_up(dev);
if (!ret) {
port_napi_enable(port);
netif_tx_start_all_queues(dev);
}
mutex_unlock(&port->port_lock);
schedule_delayed_work(&port->stats_work,
round_jiffies_relative(msecs_to_jiffies(1000)));
return ret;
}
static int ehea_down(struct net_device *dev)
{
int ret;
struct ehea_port *port = netdev_priv(dev);
if (port->state == EHEA_PORT_DOWN)
return 0;
ehea_drop_multicast_list(dev);
ehea_allmulti(dev, 0);
ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
ehea_free_interrupts(dev);
port->state = EHEA_PORT_DOWN;
ehea_update_bcmc_registrations();
ret = ehea_clean_all_portres(port);
if (ret)
netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
ehea_update_firmware_handles();
return ret;
}
static int ehea_stop(struct net_device *dev)
{
int ret;
struct ehea_port *port = netdev_priv(dev);
netif_info(port, ifdown, dev, "disabling port\n");
set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
cancel_work_sync(&port->reset_task);
cancel_delayed_work_sync(&port->stats_work);
mutex_lock(&port->port_lock);
netif_tx_stop_all_queues(dev);
port_napi_disable(port);
ret = ehea_down(dev);
mutex_unlock(&port->port_lock);
clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
return ret;
}
static void ehea_purge_sq(struct ehea_qp *orig_qp)
{
struct ehea_qp qp = *orig_qp;
struct ehea_qp_init_attr *init_attr = &qp.init_attr;
struct ehea_swqe *swqe;
int wqe_index;
int i;
for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
swqe = ehea_get_swqe(&qp, &wqe_index);
swqe->tx_control |= EHEA_SWQE_PURGE;
}
}
static void ehea_flush_sq(struct ehea_port *port)
{
int i;
for (i = 0; i < port->num_def_qps; i++) {
struct ehea_port_res *pr = &port->port_res[i];
int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
int ret;
ret = wait_event_timeout(port->swqe_avail_wq,
atomic_read(&pr->swqe_avail) >= swqe_max,
msecs_to_jiffies(100));
if (!ret) {
pr_err("WARNING: sq not flushed completely\n");
break;
}
}
}
static int ehea_stop_qps(struct net_device *dev)
{
struct ehea_port *port = netdev_priv(dev);
struct ehea_adapter *adapter = port->adapter;
struct hcp_modify_qp_cb0 *cb0;
int ret = -EIO;
int dret;
int i;
u64 hret;
u64 dummy64 = 0;
u16 dummy16 = 0;
cb0 = (void *)get_zeroed_page(GFP_KERNEL);
if (!cb0) {
ret = -ENOMEM;
goto out;
}
for (i = 0; i < (port->num_def_qps); i++) {
struct ehea_port_res *pr = &port->port_res[i];
struct ehea_qp *qp = pr->qp;
/* Purge send queue */
ehea_purge_sq(qp);
/* Disable queue pair */
hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
cb0);
if (hret != H_SUCCESS) {
pr_err("query_ehea_qp failed (1)\n");
goto out;
}
cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
1), cb0, &dummy64,
&dummy64, &dummy16, &dummy16);
if (hret != H_SUCCESS) {
pr_err("modify_ehea_qp failed (1)\n");
goto out;
}
hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
cb0);
if (hret != H_SUCCESS) {
pr_err("query_ehea_qp failed (2)\n");
goto out;
}
/* deregister shared memory regions */
dret = ehea_rem_smrs(pr);
if (dret) {
pr_err("unreg shared memory region failed\n");
goto out;
}
}
ret = 0;
out:
free_page((unsigned long)cb0);
return ret;
}
static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
{
struct ehea_qp qp = *orig_qp;
struct ehea_qp_init_attr *init_attr = &qp.init_attr;
struct ehea_rwqe *rwqe;
struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
struct sk_buff *skb;
u32 lkey = pr->recv_mr.lkey;
int i;
int index;
for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
rwqe = ehea_get_next_rwqe(&qp, 2);
rwqe->sg_list[0].l_key = lkey;
index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
skb = skba_rq2[index];
if (skb)
rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
}
for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
rwqe = ehea_get_next_rwqe(&qp, 3);
rwqe->sg_list[0].l_key = lkey;
index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
skb = skba_rq3[index];
if (skb)
rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
}
}
static int ehea_restart_qps(struct net_device *dev)
{
struct ehea_port *port = netdev_priv(dev);
struct ehea_adapter *adapter = port->adapter;
int ret = 0;
int i;
struct hcp_modify_qp_cb0 *cb0;
u64 hret;
u64 dummy64 = 0;
u16 dummy16 = 0;
cb0 = (void *)get_zeroed_page(GFP_KERNEL);
if (!cb0)
return -ENOMEM;
for (i = 0; i < (port->num_def_qps); i++) {
struct ehea_port_res *pr = &port->port_res[i];
struct ehea_qp *qp = pr->qp;
ret = ehea_gen_smrs(pr);
if (ret) {
netdev_err(dev, "creation of shared memory regions failed\n");
goto out;
}
ehea_update_rqs(qp, pr);
/* Enable queue pair */
hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
cb0);
if (hret != H_SUCCESS) {
netdev_err(dev, "query_ehea_qp failed (1)\n");
ret = -EFAULT;
goto out;
}
cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
1), cb0, &dummy64,
&dummy64, &dummy16, &dummy16);
if (hret != H_SUCCESS) {
netdev_err(dev, "modify_ehea_qp failed (1)\n");
ret = -EFAULT;
goto out;
}
hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
cb0);
if (hret != H_SUCCESS) {
netdev_err(dev, "query_ehea_qp failed (2)\n");
ret = -EFAULT;
goto out;
}
/* refill entire queue */
ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
ehea_refill_rq2(pr, 0);
ehea_refill_rq3(pr, 0);
}
out:
free_page((unsigned long)cb0);
return ret;
}
static void ehea_reset_port(struct work_struct *work)
{
int ret;
struct ehea_port *port =
container_of(work, struct ehea_port, reset_task);
struct net_device *dev = port->netdev;
mutex_lock(&dlpar_mem_lock);
port->resets++;
mutex_lock(&port->port_lock);
netif_tx_disable(dev);
port_napi_disable(port);
ehea_down(dev);
ret = ehea_up(dev);
if (ret)
goto out;
ehea_set_multicast_list(dev);
netif_info(port, timer, dev, "reset successful\n");
port_napi_enable(port);
netif_tx_wake_all_queues(dev);
out:
mutex_unlock(&port->port_lock);
mutex_unlock(&dlpar_mem_lock);
}
static void ehea_rereg_mrs(void)
{
int ret, i;
struct ehea_adapter *adapter;
pr_info("LPAR memory changed - re-initializing driver\n");
list_for_each_entry(adapter, &adapter_list, list)
if (adapter->active_ports) {
/* Shutdown all ports */
for (i = 0; i < EHEA_MAX_PORTS; i++) {
struct ehea_port *port = adapter->port[i];
struct net_device *dev;
if (!port)
continue;
dev = port->netdev;
if (dev->flags & IFF_UP) {
mutex_lock(&port->port_lock);
netif_tx_disable(dev);
ehea_flush_sq(port);
ret = ehea_stop_qps(dev);
if (ret) {
mutex_unlock(&port->port_lock);
goto out;
}
port_napi_disable(port);
mutex_unlock(&port->port_lock);
}
reset_sq_restart_flag(port);
}
/* Unregister old memory region */
ret = ehea_rem_mr(&adapter->mr);
if (ret) {
pr_err("unregister MR failed - driver inoperable!\n");
goto out;
}
}
clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
list_for_each_entry(adapter, &adapter_list, list)
if (adapter->active_ports) {
/* Register new memory region */
ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
if (ret) {
pr_err("register MR failed - driver inoperable!\n");
goto out;
}
/* Restart all ports */
for (i = 0; i < EHEA_MAX_PORTS; i++) {
struct ehea_port *port = adapter->port[i];
if (port) {
struct net_device *dev = port->netdev;
if (dev->flags & IFF_UP) {
mutex_lock(&port->port_lock);
ret = ehea_restart_qps(dev);
if (!ret) {
check_sqs(port);
port_napi_enable(port);
netif_tx_wake_all_queues(dev);
} else {
netdev_err(dev, "Unable to restart QPS\n");
}
mutex_unlock(&port->port_lock);
}
}
}
}
pr_info("re-initializing driver complete\n");
out:
return;
}
static void ehea_tx_watchdog(struct net_device *dev, unsigned int txqueue)
{
struct ehea_port *port = netdev_priv(dev);
if (netif_carrier_ok(dev) &&
!test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
ehea_schedule_port_reset(port);
}
static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
{
struct hcp_query_ehea *cb;
u64 hret;
int ret;
cb = (void *)get_zeroed_page(GFP_KERNEL);
if (!cb) {
ret = -ENOMEM;
goto out;
}
hret = ehea_h_query_ehea(adapter->handle, cb);
if (hret != H_SUCCESS) {
ret = -EIO;
goto out_herr;
}
adapter->max_mc_mac = cb->max_mc_mac - 1;
ret = 0;
out_herr:
free_page((unsigned long)cb);
out:
return ret;
}
static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
{
struct hcp_ehea_port_cb4 *cb4;
u64 hret;
int ret = 0;
*jumbo = 0;
/* (Try to) enable *jumbo frames */
cb4 = (void *)get_zeroed_page(GFP_KERNEL);
if (!cb4) {
pr_err("no mem for cb4\n");
ret = -ENOMEM;
goto out;
} else {
hret = ehea_h_query_ehea_port(port->adapter->handle,
port->logical_port_id,
H_PORT_CB4,
H_PORT_CB4_JUMBO, cb4);
if (hret == H_SUCCESS) {
if (cb4->jumbo_frame)
*jumbo = 1;
else {
cb4->jumbo_frame = 1;
hret = ehea_h_modify_ehea_port(port->adapter->
handle,
port->
logical_port_id,
H_PORT_CB4,
H_PORT_CB4_JUMBO,
cb4);
if (hret == H_SUCCESS)
*jumbo = 1;
}
} else
ret = -EINVAL;
free_page((unsigned long)cb4);
}
out:
return ret;
}
static ssize_t log_port_id_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
return sprintf(buf, "%d", port->logical_port_id);
}
static DEVICE_ATTR_RO(log_port_id);
static void logical_port_release(struct device *dev)
{
struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
of_node_put(port->ofdev.dev.of_node);
}
static struct device *ehea_register_port(struct ehea_port *port,
struct device_node *dn)
{
int ret;
port->ofdev.dev.of_node = of_node_get(dn);
port->ofdev.dev.parent = &port->adapter->ofdev->dev;
port->ofdev.dev.bus = &ibmebus_bus_type;
dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
port->ofdev.dev.release = logical_port_release;
ret = of_device_register(&port->ofdev);
if (ret) {
pr_err("failed to register device. ret=%d\n", ret);
put_device(&port->ofdev.dev);
goto out;
}
ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
if (ret) {
pr_err("failed to register attributes, ret=%d\n", ret);
goto out_unreg_of_dev;
}
return &port->ofdev.dev;
out_unreg_of_dev:
of_device_unregister(&port->ofdev);
out:
return NULL;
}
static void ehea_unregister_port(struct ehea_port *port)
{
device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
of_device_unregister(&port->ofdev);
}
static const struct net_device_ops ehea_netdev_ops = {
.ndo_open = ehea_open,
.ndo_stop = ehea_stop,
.ndo_start_xmit = ehea_start_xmit,
.ndo_get_stats64 = ehea_get_stats64,
.ndo_set_mac_address = ehea_set_mac_addr,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_rx_mode = ehea_set_multicast_list,
.ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid,
.ndo_tx_timeout = ehea_tx_watchdog,
};
static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
u32 logical_port_id,
struct device_node *dn)
{
int ret;
struct net_device *dev;
struct ehea_port *port;
struct device *port_dev;
int jumbo;
/* allocate memory for the port structures */
dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
if (!dev) {
ret = -ENOMEM;
goto out_err;
}
port = netdev_priv(dev);
mutex_init(&port->port_lock);
port->state = EHEA_PORT_DOWN;
port->sig_comp_iv = sq_entries / 10;
port->adapter = adapter;
port->netdev = dev;
port->logical_port_id = logical_port_id;
port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
if (!port->mc_list) {
ret = -ENOMEM;
goto out_free_ethdev;
}
INIT_LIST_HEAD(&port->mc_list->list);
ret = ehea_sense_port_attr(port);
if (ret)
goto out_free_mc_list;
netif_set_real_num_rx_queues(dev, port->num_def_qps);
netif_set_real_num_tx_queues(dev, port->num_def_qps);
port_dev = ehea_register_port(port, dn);
if (!port_dev)
goto out_free_mc_list;
SET_NETDEV_DEV(dev, port_dev);
/* initialize net_device structure */
eth_hw_addr_set(dev, (u8 *)&port->mac_addr);
dev->netdev_ops = &ehea_netdev_ops;
ehea_set_ethtool_ops(dev);
dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
dev->features = NETIF_F_SG | NETIF_F_TSO |
NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
NETIF_F_IP_CSUM;
dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
/* MTU range: 68 - 9022 */
dev->min_mtu = ETH_MIN_MTU;
dev->max_mtu = EHEA_MAX_PACKET_SIZE;
INIT_WORK(&port->reset_task, ehea_reset_port);
INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
init_waitqueue_head(&port->swqe_avail_wq);
init_waitqueue_head(&port->restart_wq);
ret = register_netdev(dev);
if (ret) {
pr_err("register_netdev failed. ret=%d\n", ret);
goto out_unreg_port;
}
ret = ehea_get_jumboframe_status(port, &jumbo);
if (ret)
netdev_err(dev, "failed determining jumbo frame status\n");
netdev_info(dev, "Jumbo frames are %sabled\n",
jumbo == 1 ? "en" : "dis");
adapter->active_ports++;
return port;
out_unreg_port:
ehea_unregister_port(port);
out_free_mc_list:
kfree(port->mc_list);
out_free_ethdev:
free_netdev(dev);
out_err:
pr_err("setting up logical port with id=%d failed, ret=%d\n",
logical_port_id, ret);
return NULL;
}
static void ehea_shutdown_single_port(struct ehea_port *port)
{
struct ehea_adapter *adapter = port->adapter;
cancel_work_sync(&port->reset_task);
cancel_delayed_work_sync(&port->stats_work);
unregister_netdev(port->netdev);
ehea_unregister_port(port);
kfree(port->mc_list);
free_netdev(port->netdev);
adapter->active_ports--;
}
static int ehea_setup_ports(struct ehea_adapter *adapter)
{
struct device_node *lhea_dn;
struct device_node *eth_dn = NULL;
const u32 *dn_log_port_id;
int i = 0;
lhea_dn = adapter->ofdev->dev.of_node;
while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
NULL);
if (!dn_log_port_id) {
pr_err("bad device node: eth_dn name=%pOF\n", eth_dn);
continue;
}
if (ehea_add_adapter_mr(adapter)) {
pr_err("creating MR failed\n");
of_node_put(eth_dn);
return -EIO;
}
adapter->port[i] = ehea_setup_single_port(adapter,
*dn_log_port_id,
eth_dn);
if (adapter->port[i])
netdev_info(adapter->port[i]->netdev,
"logical port id #%d\n", *dn_log_port_id);
else
ehea_remove_adapter_mr(adapter);
i++;
}
return 0;
}
static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
u32 logical_port_id)
{
struct device_node *lhea_dn;
struct device_node *eth_dn = NULL;
const u32 *dn_log_port_id;
lhea_dn = adapter->ofdev->dev.of_node;
while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
NULL);
if (dn_log_port_id)
if (*dn_log_port_id == logical_port_id)
return eth_dn;
}
return NULL;
}
static ssize_t probe_port_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct ehea_adapter *adapter = dev_get_drvdata(dev);
struct ehea_port *port;
struct device_node *eth_dn = NULL;
int i;
u32 logical_port_id;
sscanf(buf, "%d", &logical_port_id);
port = ehea_get_port(adapter, logical_port_id);
if (port) {
netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
logical_port_id);
return -EINVAL;
}
eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
if (!eth_dn) {
pr_info("no logical port with id %d found\n", logical_port_id);
return -EINVAL;
}
if (ehea_add_adapter_mr(adapter)) {
pr_err("creating MR failed\n");
of_node_put(eth_dn);
return -EIO;
}
port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
of_node_put(eth_dn);
if (port) {
for (i = 0; i < EHEA_MAX_PORTS; i++)
if (!adapter->port[i]) {
adapter->port[i] = port;
break;
}
netdev_info(port->netdev, "added: (logical port id=%d)\n",
logical_port_id);
} else {
ehea_remove_adapter_mr(adapter);
return -EIO;
}
return (ssize_t) count;
}
static ssize_t remove_port_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct ehea_adapter *adapter = dev_get_drvdata(dev);
struct ehea_port *port;
int i;
u32 logical_port_id;
sscanf(buf, "%d", &logical_port_id);
port = ehea_get_port(adapter, logical_port_id);
if (port) {
netdev_info(port->netdev, "removed: (logical port id=%d)\n",
logical_port_id);
ehea_shutdown_single_port(port);
for (i = 0; i < EHEA_MAX_PORTS; i++)
if (adapter->port[i] == port) {
adapter->port[i] = NULL;
break;
}
} else {
pr_err("removing port with logical port id=%d failed. port not configured.\n",
logical_port_id);
return -EINVAL;
}
ehea_remove_adapter_mr(adapter);
return (ssize_t) count;
}
static DEVICE_ATTR_WO(probe_port);
static DEVICE_ATTR_WO(remove_port);
static int ehea_create_device_sysfs(struct platform_device *dev)
{
int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
if (ret)
goto out;
ret = device_create_file(&dev->dev, &dev_attr_remove_port);
out:
return ret;
}
static void ehea_remove_device_sysfs(struct platform_device *dev)
{
device_remove_file(&dev->dev, &dev_attr_probe_port);
device_remove_file(&dev->dev, &dev_attr_remove_port);
}
static int ehea_reboot_notifier(struct notifier_block *nb,
unsigned long action, void *unused)
{
if (action == SYS_RESTART) {
pr_info("Reboot: freeing all eHEA resources\n");
ibmebus_unregister_driver(&ehea_driver);
}
return NOTIFY_DONE;
}
static struct notifier_block ehea_reboot_nb = {
.notifier_call = ehea_reboot_notifier,
};
static int ehea_mem_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
int ret = NOTIFY_BAD;
struct memory_notify *arg = data;
mutex_lock(&dlpar_mem_lock);
switch (action) {
case MEM_CANCEL_OFFLINE:
pr_info("memory offlining canceled");
fallthrough; /* re-add canceled memory block */
case MEM_ONLINE:
pr_info("memory is going online");
set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
goto out_unlock;
ehea_rereg_mrs();
break;
case MEM_GOING_OFFLINE:
pr_info("memory is going offline");
set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
goto out_unlock;
ehea_rereg_mrs();
break;
default:
break;
}
ehea_update_firmware_handles();
ret = NOTIFY_OK;
out_unlock:
mutex_unlock(&dlpar_mem_lock);
return ret;
}
static struct notifier_block ehea_mem_nb = {
.notifier_call = ehea_mem_notifier,
};
static void ehea_crash_handler(void)
{
int i;
if (ehea_fw_handles.arr)
for (i = 0; i < ehea_fw_handles.num_entries; i++)
ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
ehea_fw_handles.arr[i].fwh,
FORCE_FREE);
if (ehea_bcmc_regs.arr)
for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
ehea_bcmc_regs.arr[i].port_id,
ehea_bcmc_regs.arr[i].reg_type,
ehea_bcmc_regs.arr[i].macaddr,
0, H_DEREG_BCMC);
}
static atomic_t ehea_memory_hooks_registered;
/* Register memory hooks on probe of first adapter */
static int ehea_register_memory_hooks(void)
{
int ret = 0;
if (atomic_inc_return(&ehea_memory_hooks_registered) > 1)
return 0;
ret = ehea_create_busmap();
if (ret) {
pr_info("ehea_create_busmap failed\n");
goto out;
}
ret = register_reboot_notifier(&ehea_reboot_nb);
if (ret) {
pr_info("register_reboot_notifier failed\n");
goto out;
}
ret = register_memory_notifier(&ehea_mem_nb);
if (ret) {
pr_info("register_memory_notifier failed\n");
goto out2;
}
ret = crash_shutdown_register(ehea_crash_handler);
if (ret) {
pr_info("crash_shutdown_register failed\n");
goto out3;
}
return 0;
out3:
unregister_memory_notifier(&ehea_mem_nb);
out2:
unregister_reboot_notifier(&ehea_reboot_nb);
out:
atomic_dec(&ehea_memory_hooks_registered);
return ret;
}
static void ehea_unregister_memory_hooks(void)
{
/* Only remove the hooks if we've registered them */
if (atomic_read(&ehea_memory_hooks_registered) == 0)
return;
unregister_reboot_notifier(&ehea_reboot_nb);
if (crash_shutdown_unregister(ehea_crash_handler))
pr_info("failed unregistering crash handler\n");
unregister_memory_notifier(&ehea_mem_nb);
}
static int ehea_probe_adapter(struct platform_device *dev)
{
struct ehea_adapter *adapter;
const u64 *adapter_handle;
int ret;
int i;
ret = ehea_register_memory_hooks();
if (ret)
return ret;
if (!dev || !dev->dev.of_node) {
pr_err("Invalid ibmebus device probed\n");
return -EINVAL;
}
adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL);
if (!adapter) {
ret = -ENOMEM;
dev_err(&dev->dev, "no mem for ehea_adapter\n");
goto out;
}
list_add(&adapter->list, &adapter_list);
adapter->ofdev = dev;
adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
NULL);
if (adapter_handle)
adapter->handle = *adapter_handle;
if (!adapter->handle) {
dev_err(&dev->dev, "failed getting handle for adapter"
" '%pOF'\n", dev->dev.of_node);
ret = -ENODEV;
goto out_free_ad;
}
adapter->pd = EHEA_PD_ID;
platform_set_drvdata(dev, adapter);
/* initialize adapter and ports */
/* get adapter properties */
ret = ehea_sense_adapter_attr(adapter);
if (ret) {
dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
goto out_free_ad;
}
adapter->neq = ehea_create_eq(adapter,
EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
if (!adapter->neq) {
ret = -EIO;
dev_err(&dev->dev, "NEQ creation failed\n");
goto out_free_ad;
}
tasklet_setup(&adapter->neq_tasklet, ehea_neq_tasklet);
ret = ehea_create_device_sysfs(dev);
if (ret)
goto out_kill_eq;
ret = ehea_setup_ports(adapter);
if (ret) {
dev_err(&dev->dev, "setup_ports failed\n");
goto out_rem_dev_sysfs;
}
ret = ibmebus_request_irq(adapter->neq->attr.ist1,
ehea_interrupt_neq, 0,
"ehea_neq", adapter);
if (ret) {
dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
goto out_shutdown_ports;
}
/* Handle any events that might be pending. */
tasklet_hi_schedule(&adapter->neq_tasklet);
ret = 0;
goto out;
out_shutdown_ports:
for (i = 0; i < EHEA_MAX_PORTS; i++)
if (adapter->port[i]) {
ehea_shutdown_single_port(adapter->port[i]);
adapter->port[i] = NULL;
}
out_rem_dev_sysfs:
ehea_remove_device_sysfs(dev);
out_kill_eq:
ehea_destroy_eq(adapter->neq);
out_free_ad:
list_del(&adapter->list);
out:
ehea_update_firmware_handles();
return ret;
}
static void ehea_remove(struct platform_device *dev)
{
struct ehea_adapter *adapter = platform_get_drvdata(dev);
int i;
for (i = 0; i < EHEA_MAX_PORTS; i++)
if (adapter->port[i]) {
ehea_shutdown_single_port(adapter->port[i]);
adapter->port[i] = NULL;
}
ehea_remove_device_sysfs(dev);
ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
tasklet_kill(&adapter->neq_tasklet);
ehea_destroy_eq(adapter->neq);
ehea_remove_adapter_mr(adapter);
list_del(&adapter->list);
ehea_update_firmware_handles();
}
static int check_module_parm(void)
{
int ret = 0;
if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
(rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
pr_info("Bad parameter: rq1_entries\n");
ret = -EINVAL;
}
if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
(rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
pr_info("Bad parameter: rq2_entries\n");
ret = -EINVAL;
}
if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
(rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
pr_info("Bad parameter: rq3_entries\n");
ret = -EINVAL;
}
if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
(sq_entries > EHEA_MAX_ENTRIES_SQ)) {
pr_info("Bad parameter: sq_entries\n");
ret = -EINVAL;
}
return ret;
}
static ssize_t capabilities_show(struct device_driver *drv, char *buf)
{
return sprintf(buf, "%d", EHEA_CAPABILITIES);
}
static DRIVER_ATTR_RO(capabilities);
static int __init ehea_module_init(void)
{
int ret;
pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
mutex_init(&ehea_fw_handles.lock);
spin_lock_init(&ehea_bcmc_regs.lock);
ret = check_module_parm();
if (ret)
goto out;
ret = ibmebus_register_driver(&ehea_driver);
if (ret) {
pr_err("failed registering eHEA device driver on ebus\n");
goto out;
}
ret = driver_create_file(&ehea_driver.driver,
&driver_attr_capabilities);
if (ret) {
pr_err("failed to register capabilities attribute, ret=%d\n",
ret);
goto out2;
}
return ret;
out2:
ibmebus_unregister_driver(&ehea_driver);
out:
return ret;
}
static void __exit ehea_module_exit(void)
{
driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
ibmebus_unregister_driver(&ehea_driver);
ehea_unregister_memory_hooks();
kfree(ehea_fw_handles.arr);
kfree(ehea_bcmc_regs.arr);
ehea_destroy_busmap();
}
module_init(ehea_module_init);
module_exit(ehea_module_exit);
Codebase Browser
linux