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s390/qeth: consolidate RX code 

To reduce the path length and levels of indirection, move the RX
processing from the sub-drivers into the core.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Wiedmann 2019-12-23 15:22:25 +01:00 коммит произвёл David S. Miller
Родитель 0914d2bb11
Коммит c04b116a28
4 изменённых файлов: 154 добавлений и 175 удалений
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16
drivers/s390/net/qeth_core.h
Просмотреть файл

@ -728,7 +728,6 @@ struct qeth_osn_info {
struct qeth_discipline {
const struct device_type *devtype;
int (*process_rx_buffer)(struct qeth_card *card, int budget, int *done);
int (*recover)(void *ptr);
int (*setup) (struct ccwgroup_device *);
void (*remove) (struct ccwgroup_device *);
@ -923,18 +922,6 @@ static inline struct dst_entry *qeth_dst_check_rcu(struct sk_buff *skb, int ipv)
return dst;
}
static inline void qeth_rx_csum(struct qeth_card *card, struct sk_buff *skb,
u8 flags)
{
if ((card->dev->features & NETIF_F_RXCSUM) &&
(flags & QETH_HDR_EXT_CSUM_TRANSP_REQ)) {
skb->ip_summed = CHECKSUM_UNNECESSARY;
QETH_CARD_STAT_INC(card, rx_skb_csum);
} else {
skb->ip_summed = CHECKSUM_NONE;
}
}
static inline void qeth_tx_csum(struct sk_buff *skb, u8 *flags, int ipv)
{
*flags |= QETH_HDR_EXT_CSUM_TRANSP_REQ;
@ -1031,9 +1018,6 @@ struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason);
void qeth_put_cmd(struct qeth_cmd_buffer *iob);
struct sk_buff *qeth_core_get_next_skb(struct qeth_card *,
struct qeth_qdio_buffer *, struct qdio_buffer_element **, int *,
struct qeth_hdr **);
void qeth_schedule_recovery(struct qeth_card *);
int qeth_poll(struct napi_struct *napi, int budget);
void qeth_clear_ipacmd_list(struct qeth_card *);

182
drivers/s390/net/qeth_core_main.c
Просмотреть файл

@ -5046,6 +5046,114 @@ out:
}
EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
#if IS_ENABLED(CONFIG_QETH_L3)
static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
struct qeth_hdr *hdr)
{
struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
struct net_device *dev = skb->dev;
if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
"FAKELL", skb->len);
return;
}
if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
ETH_P_IP;
unsigned char tg_addr[ETH_ALEN];
skb_reset_network_header(skb);
switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
case QETH_CAST_MULTICAST:
if (prot == ETH_P_IP)
ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
else
ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
QETH_CARD_STAT_INC(card, rx_multicast);
break;
case QETH_CAST_BROADCAST:
ether_addr_copy(tg_addr, dev->broadcast);
QETH_CARD_STAT_INC(card, rx_multicast);
break;
default:
if (card->options.sniffer)
skb->pkt_type = PACKET_OTHERHOST;
ether_addr_copy(tg_addr, dev->dev_addr);
}
if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
dev_hard_header(skb, dev, prot, tg_addr,
&l3_hdr->next_hop.rx.src_mac, skb->len);
else
dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
skb->len);
}
/* copy VLAN tag from hdr into skb */
if (!card->options.sniffer &&
(l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
l3_hdr->vlan_id :
l3_hdr->next_hop.rx.vlan_id;
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
}
}
#endif
static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
struct qeth_hdr *hdr)
{
bool is_cso;
switch (hdr->hdr.l2.id) {
case QETH_HEADER_TYPE_OSN:
skb_push(skb, sizeof(*hdr));
skb_copy_to_linear_data(skb, hdr, sizeof(*hdr));
QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
QETH_CARD_STAT_INC(card, rx_packets);
card->osn_info.data_cb(skb);
return;
#if IS_ENABLED(CONFIG_QETH_L3)
case QETH_HEADER_TYPE_LAYER3:
qeth_l3_rebuild_skb(card, skb, hdr);
is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
break;
#endif
case QETH_HEADER_TYPE_LAYER2:
is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
break;
default:
/* never happens */
dev_kfree_skb_any(skb);
return;
}
if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
skb->ip_summed = CHECKSUM_UNNECESSARY;
QETH_CARD_STAT_INC(card, rx_skb_csum);
} else {
skb->ip_summed = CHECKSUM_NONE;
}
skb->protocol = eth_type_trans(skb, skb->dev);
QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
QETH_CARD_STAT_INC(card, rx_packets);
if (skb_is_nonlinear(skb)) {
QETH_CARD_STAT_INC(card, rx_sg_skbs);
QETH_CARD_STAT_ADD(card, rx_sg_frags,
skb_shinfo(skb)->nr_frags);
}
napi_gro_receive(&card->napi, skb);
}
static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
{
struct page *page = virt_to_page(data);
@ -5062,10 +5170,10 @@ static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
}
struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
struct qeth_qdio_buffer *qethbuffer,
struct qdio_buffer_element **__element, int *__offset,
struct qeth_hdr **hdr)
static int qeth_extract_skb(struct qeth_card *card,
struct qeth_qdio_buffer *qethbuffer,
struct qdio_buffer_element **__element,
int *__offset)
{
struct qdio_buffer_element *element = *__element;
struct qdio_buffer *buffer = qethbuffer->buffer;
@ -5073,6 +5181,7 @@ struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
int offset = *__offset;
bool use_rx_sg = false;
unsigned int headroom;
struct qeth_hdr *hdr;
struct sk_buff *skb;
int skb_len = 0;
@ -5080,42 +5189,42 @@ next_packet:
/* qeth_hdr must not cross element boundaries */
while (element->length < offset + sizeof(struct qeth_hdr)) {
if (qeth_is_last_sbale(element))
return NULL;
return -ENODATA;
element++;
offset = 0;
}
*hdr = element->addr + offset;
offset += sizeof(struct qeth_hdr);
hdr = element->addr + offset;
offset += sizeof(*hdr);
skb = NULL;
switch ((*hdr)->hdr.l2.id) {
switch (hdr->hdr.l2.id) {
case QETH_HEADER_TYPE_LAYER2:
skb_len = (*hdr)->hdr.l2.pkt_length;
skb_len = hdr->hdr.l2.pkt_length;
linear_len = ETH_HLEN;
headroom = 0;
break;
case QETH_HEADER_TYPE_LAYER3:
skb_len = (*hdr)->hdr.l3.length;
skb_len = hdr->hdr.l3.length;
if (!IS_LAYER3(card)) {
QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
goto walk_packet;
}
if ((*hdr)->hdr.l3.flags & QETH_HDR_PASSTHRU) {
if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
linear_len = ETH_HLEN;
headroom = 0;
break;
}
if ((*hdr)->hdr.l3.flags & QETH_HDR_IPV6)
if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
linear_len = sizeof(struct ipv6hdr);
else
linear_len = sizeof(struct iphdr);
headroom = ETH_HLEN;
break;
case QETH_HEADER_TYPE_OSN:
skb_len = (*hdr)->hdr.osn.pdu_length;
skb_len = hdr->hdr.osn.pdu_length;
if (!IS_OSN(card)) {
QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
goto walk_packet;
@ -5125,13 +5234,13 @@ next_packet:
headroom = sizeof(struct qeth_hdr);
break;
default:
if ((*hdr)->hdr.l2.id & QETH_HEADER_MASK_INVAL)
if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
QETH_CARD_STAT_INC(card, rx_frame_errors);
else
QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
/* Can't determine packet length, drop the whole buffer. */
return NULL;
return -EPROTONOSUPPORT;
}
if (skb_len < linear_len) {
@ -5195,7 +5304,7 @@ walk_packet:
QETH_CARD_STAT_INC(card,
rx_length_errors);
}
return NULL;
return -EMSGSIZE;
}
element++;
offset = 0;
@ -5208,22 +5317,40 @@ walk_packet:
*__element = element;
*__offset = offset;
if (use_rx_sg) {
QETH_CARD_STAT_INC(card, rx_sg_skbs);
QETH_CARD_STAT_ADD(card, rx_sg_frags,
skb_shinfo(skb)->nr_frags);
}
return skb;
qeth_receive_skb(card, skb, hdr);
return 0;
}
static int qeth_extract_skbs(struct qeth_card *card, int budget,
struct qeth_qdio_buffer *buf, bool *done)
{
int work_done = 0;
WARN_ON_ONCE(!budget);
*done = false;
while (budget) {
if (qeth_extract_skb(card, buf, &card->rx.b_element,
&card->rx.e_offset)) {
*done = true;
break;
}
work_done++;
budget--;
}
return work_done;
}
EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
int qeth_poll(struct napi_struct *napi, int budget)
{
struct qeth_card *card = container_of(napi, struct qeth_card, napi);
int work_done = 0;
struct qeth_qdio_buffer *buffer;
int done;
int new_budget = budget;
bool done;
while (1) {
if (!card->rx.b_count) {
@ -5246,11 +5373,10 @@ int qeth_poll(struct napi_struct *napi, int budget)
if (!(card->rx.qdio_err &&
qeth_check_qdio_errors(card, buffer->buffer,
card->rx.qdio_err, "qinerr")))
work_done +=
card->discipline->process_rx_buffer(
card, new_budget, &done);
work_done += qeth_extract_skbs(card, new_budget,
buffer, &done);
else
done = 1;
done = true;
if (done) {
QETH_CARD_STAT_INC(card, rx_bufs);

40
drivers/s390/net/qeth_l2_main.c
Просмотреть файл

@ -298,45 +298,6 @@ static void qeth_l2_stop_card(struct qeth_card *card)
card->info.promisc_mode = 0;
}
static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
int budget, int *done)
{
int work_done = 0;
struct sk_buff *skb;
struct qeth_hdr *hdr;
unsigned int len;
*done = 0;
WARN_ON_ONCE(!budget);
while (budget) {
skb = qeth_core_get_next_skb(card,
&card->qdio.in_q->bufs[card->rx.b_index],
&card->rx.b_element, &card->rx.e_offset, &hdr);
if (!skb) {
*done = 1;
break;
}
if (hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
skb->protocol = eth_type_trans(skb, skb->dev);
qeth_rx_csum(card, skb, hdr->hdr.l2.flags[1]);
len = skb->len;
napi_gro_receive(&card->napi, skb);
} else {
skb_push(skb, sizeof(*hdr));
skb_copy_to_linear_data(skb, hdr, sizeof(*hdr));
len = skb->len;
card->osn_info.data_cb(skb);
}
work_done++;
budget--;
QETH_CARD_STAT_INC(card, rx_packets);
QETH_CARD_STAT_ADD(card, rx_bytes, len);
}
return work_done;
}
static int qeth_l2_request_initial_mac(struct qeth_card *card)
{
int rc = 0;
@ -961,7 +922,6 @@ static int qeth_l2_control_event(struct qeth_card *card,
struct qeth_discipline qeth_l2_discipline = {
.devtype = &qeth_l2_devtype,
.process_rx_buffer = qeth_l2_process_inbound_buffer,
.recover = qeth_l2_recover,
.setup = qeth_l2_probe_device,
.remove = qeth_l2_remove_device,

91
drivers/s390/net/qeth_l3_main.c
Просмотреть файл

@ -1164,96 +1164,6 @@ static int qeth_l3_vlan_rx_kill_vid(struct net_device *dev,
return 0;
}
static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
struct qeth_hdr *hdr)
{
struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
struct net_device *dev = skb->dev;
if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
"FAKELL", skb->len);
return;
}
if (!(hdr->hdr.l3.flags & QETH_HDR_PASSTHRU)) {
u16 prot = (hdr->hdr.l3.flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
ETH_P_IP;
unsigned char tg_addr[ETH_ALEN];
skb_reset_network_header(skb);
switch (hdr->hdr.l3.flags & QETH_HDR_CAST_MASK) {
case QETH_CAST_MULTICAST:
if (prot == ETH_P_IP)
ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
else
ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
QETH_CARD_STAT_INC(card, rx_multicast);
break;
case QETH_CAST_BROADCAST:
ether_addr_copy(tg_addr, card->dev->broadcast);
QETH_CARD_STAT_INC(card, rx_multicast);
break;
default:
if (card->options.sniffer)
skb->pkt_type = PACKET_OTHERHOST;
ether_addr_copy(tg_addr, card->dev->dev_addr);
}
if (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
card->dev->header_ops->create(skb, card->dev, prot,
tg_addr, &hdr->hdr.l3.next_hop.rx.src_mac,
skb->len);
else
card->dev->header_ops->create(skb, card->dev, prot,
tg_addr, "FAKELL", skb->len);
}
/* copy VLAN tag from hdr into skb */
if (!card->options.sniffer &&
(hdr->hdr.l3.ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
u16 tag = (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
hdr->hdr.l3.vlan_id :
hdr->hdr.l3.next_hop.rx.vlan_id;
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
}
qeth_rx_csum(card, skb, hdr->hdr.l3.ext_flags);
}
static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
int budget, int *done)
{
int work_done = 0;
struct sk_buff *skb;
struct qeth_hdr *hdr;
*done = 0;
WARN_ON_ONCE(!budget);
while (budget) {
skb = qeth_core_get_next_skb(card,
&card->qdio.in_q->bufs[card->rx.b_index],
&card->rx.b_element, &card->rx.e_offset, &hdr);
if (!skb) {
*done = 1;
break;
}
if (hdr->hdr.l3.id == QETH_HEADER_TYPE_LAYER3)
qeth_l3_rebuild_skb(card, skb, hdr);
skb->protocol = eth_type_trans(skb, skb->dev);
QETH_CARD_STAT_INC(card, rx_packets);
QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
napi_gro_receive(&card->napi, skb);
work_done++;
budget--;
}
return work_done;
}
static void qeth_l3_stop_card(struct qeth_card *card)
{
QETH_CARD_TEXT(card, 2, "stopcard");
@ -2317,7 +2227,6 @@ static int qeth_l3_control_event(struct qeth_card *card,
struct qeth_discipline qeth_l3_discipline = {
.devtype = &qeth_l3_devtype,
.process_rx_buffer = qeth_l3_process_inbound_buffer,
.recover = qeth_l3_recover,
.setup = qeth_l3_probe_device,
.remove = qeth_l3_remove_device,