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Message-Id: <1434588587-25655-8-git-send-email-izumi.taku@jp.fujitsu.com>
Date: Thu, 18 Jun 2015 09:49:33 +0900
From: Taku Izumi <izumi.taku@...fujitsu.com>
To: platform-driver-x86@...r.kernel.org, dvhart@...radead.org
Cc: rkhan@...hat.com, alexander.h.duyck@...hat.com,
netdev@...r.kernel.org, linux-acpi@...r.kernel.org,
Taku Izumi <izumi.taku@...fujitsu.com>
Subject: [PATCH 08/22] fjes: net_device_ops.ndo_start_xmit
This patch adds net_device_ops.ndo_start_xmit callback,
which is called when sending packets.
Signed-off-by: Taku Izumi <izumi.taku@...fujitsu.com>
---
drivers/platform/x86/fjes/fjes.h | 1 +
drivers/platform/x86/fjes/fjes_hw.c | 58 +++++++++++
drivers/platform/x86/fjes/fjes_hw.h | 12 +++
drivers/platform/x86/fjes/fjes_main.c | 190 ++++++++++++++++++++++++++++++++++
4 files changed, 261 insertions(+)
diff --git a/drivers/platform/x86/fjes/fjes.h b/drivers/platform/x86/fjes/fjes.h
index 7f03eb7..d8901aa 100644
--- a/drivers/platform/x86/fjes/fjes.h
+++ b/drivers/platform/x86/fjes/fjes.h
@@ -30,6 +30,7 @@
#define FJES_ACPI_SYMBOL "Extended Socket"
#define FJES_MAX_QUEUES 1
#define FJES_TX_RETRY_INTERVAL (20 * HZ)
+#define FJES_TX_RETRY_TIMEOUT (100)
#define FJES_OPEN_ZONE_UPDATE_WAIT (300) /* msec */
/* board specific private data structure */
diff --git a/drivers/platform/x86/fjes/fjes_hw.c b/drivers/platform/x86/fjes/fjes_hw.c
index e2137d8..8be343f 100644
--- a/drivers/platform/x86/fjes/fjes_hw.c
+++ b/drivers/platform/x86/fjes/fjes_hw.c
@@ -809,3 +809,61 @@ int fjes_hw_wait_epstop(struct fjes_hw *hw)
return (wait_time < FJES_COMMAND_EPSTOP_WAIT_TIMEOUT * 1000)
? 0 : -EBUSY;
}
+
+bool fjes_hw_check_epbuf_version(struct epbuf_handler *epbh, u32 version)
+{
+ union ep_buffer_info *info = epbh->info;
+
+ return (info->common.version == version);
+}
+
+bool fjes_hw_check_mtu(struct epbuf_handler *epbh, u32 mtu)
+{
+ union ep_buffer_info *info = epbh->info;
+
+ return (info->v1i.frame_max == FJES_MTU_TO_FRAME_SIZE(mtu));
+}
+
+bool fjes_hw_check_vlan_id(struct epbuf_handler *epbh, u16 vlan_id)
+{
+ union ep_buffer_info *info = epbh->info;
+ int i;
+ bool ret = false;
+
+ if (vlan_id == 0) {
+ ret = true;
+ } else {
+ for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++) {
+ if (vlan_id == info->v1i.vlan_id[i]) {
+ ret = true;
+ break;
+ }
+ }
+ }
+ return ret;
+}
+
+int fjes_hw_epbuf_tx_pkt_send(struct epbuf_handler *epbh,
+ void *frame, size_t size)
+{
+ union ep_buffer_info *info = epbh->info;
+ struct esmem_frame_t *ring_frame;
+
+ if (EP_RING_FULL(info->v1i.head, info->v1i.tail, info->v1i.count_max))
+ return -ENOBUFS;
+
+ ring_frame =
+ (struct esmem_frame_t *)&(epbh->
+ ring[EP_RING_INDEX
+ (info->v1i.tail - 1,
+ info->v1i.count_max) *
+ info->v1i.frame_max]);
+
+ ring_frame->frame_size = size;
+ memcpy((void *)(ring_frame->frame_data), (void *)frame, size);
+
+ EP_RING_INDEX_INC(epbh->info->v1i.tail, info->v1i.count_max);
+
+ return 0;
+}
+
diff --git a/drivers/platform/x86/fjes/fjes_hw.h b/drivers/platform/x86/fjes/fjes_hw.h
index 170bcfb..f6fdae5 100644
--- a/drivers/platform/x86/fjes/fjes_hw.h
+++ b/drivers/platform/x86/fjes/fjes_hw.h
@@ -49,6 +49,9 @@ struct fjes_hw;
#define FJES_ZONING_ZONE_TYPE_NONE (0xFF)
+#define FJES_TX_DELAY_SEND_NONE (0)
+#define FJES_TX_DELAY_SEND_PENDING (1)
+
#define FJES_RX_STOP_REQ_NONE (0x0)
#define FJES_RX_STOP_REQ_DONE (0x1)
#define FJES_RX_STOP_REQ_REQUEST (0x2)
@@ -60,6 +63,11 @@ struct fjes_hw;
#define EP_RING_NUM(buffer_size, frame_size) \
(u32)((buffer_size) / (frame_size))
+#define EP_RING_INDEX(_num, _max) (((_num) + (_max)) % (_max))
+#define EP_RING_INDEX_INC(_num, _max) \
+ ((_num) = EP_RING_INDEX((_num) + 1, (_max)))
+#define EP_RING_FULL(_head, _tail, _max) \
+ (0 == EP_RING_INDEX(((_tail) - (_head)), (_max)))
#define FJES_MTU_TO_BUFFER_SIZE(mtu) \
(ETH_HLEN + VLAN_HLEN + (mtu) + ETH_FCS_LEN)
@@ -312,5 +320,9 @@ enum ep_partner_status
bool fjes_hw_epid_is_same_zone(struct fjes_hw *, int);
int fjes_hw_epid_is_shared(struct fjes_device_shared_info *, int);
+bool fjes_hw_check_epbuf_version(struct epbuf_handler *, u32);
+bool fjes_hw_check_mtu(struct epbuf_handler *, u32);
+bool fjes_hw_check_vlan_id(struct epbuf_handler *, u16);
+int fjes_hw_epbuf_tx_pkt_send(struct epbuf_handler *, void *, size_t);
#endif /* FJES_HW_H_ */
diff --git a/drivers/platform/x86/fjes/fjes_main.c b/drivers/platform/x86/fjes/fjes_main.c
index 14a72ec..0d4bca6 100644
--- a/drivers/platform/x86/fjes/fjes_main.c
+++ b/drivers/platform/x86/fjes/fjes_main.c
@@ -52,6 +52,8 @@ static int fjes_open(struct net_device *);
static int fjes_close(struct net_device *);
static int fjes_setup_resources(struct fjes_adapter *);
static void fjes_free_resources(struct fjes_adapter *);
+static netdev_tx_t fjes_xmit_frame(struct sk_buff *,
+ struct net_device *);
static irqreturn_t fjes_intr(int, void*);
static int fjes_acpi_add(struct acpi_device *);
@@ -215,6 +217,7 @@ static void fjes_free_irq(struct fjes_adapter *adapter)
static const struct net_device_ops fjes_netdev_ops = {
.ndo_open = fjes_open,
.ndo_stop = fjes_close,
+ .ndo_start_xmit = fjes_xmit_frame,
};
/*
@@ -416,6 +419,193 @@ static void fjes_free_resources(struct fjes_adapter *adapter)
}
+static int fjes_tx_send(struct fjes_adapter *adapter, int dest,
+ void *data, size_t len)
+{
+ int retval;
+
+ retval = fjes_hw_epbuf_tx_pkt_send(
+ &(adapter->hw.ep_shm_info[dest].tx), data, len);
+ if (retval)
+ return retval;
+
+ adapter->hw.ep_shm_info[dest].tx.info->v1i.tx_status =
+ FJES_TX_DELAY_SEND_PENDING;
+
+ retval = 0;
+ return retval;
+}
+
+static netdev_tx_t fjes_xmit_frame(struct sk_buff *skb,
+ struct net_device *netdev)
+{
+ struct fjes_adapter *adapter = netdev_priv(netdev);
+ struct fjes_hw *hw = &adapter->hw;
+ enum ep_partner_status pstatus;
+
+ int len;
+ char *data, shortpkt[VLAN_ETH_HLEN];
+
+ u16 queue_no = 0;
+ struct netdev_queue *cur_queue = netdev_get_tx_queue(netdev, queue_no);
+ netdev_tx_t ret = NETDEV_TX_OK;
+ struct ethhdr *eth;
+ int dest_epid;
+
+ int max_epid, my_epid;
+ u16 vlan_id = 0;
+ bool vlan = false;
+ bool is_multi = false;
+
+ eth = (struct ethhdr *)skb->data;
+ my_epid = hw->my_epid;
+
+ vlan = (vlan_get_tag(skb, &vlan_id) == 0) ? true : false;
+
+ data = skb->data;
+ len = skb->len;
+
+ if (is_multicast_ether_addr(eth->h_dest)) {
+ dest_epid = 0;
+ max_epid = hw->max_epid;
+ is_multi = true;
+ } else if (is_local_ether_addr(eth->h_dest)) {
+
+ dest_epid = eth->h_dest[ETH_ALEN - 1];
+ max_epid = dest_epid + 1;
+
+ if ((eth->h_dest[0] == 0x02) &&
+ (0x00 == (eth->h_dest[1] | eth->h_dest[2] |
+ eth->h_dest[3] | eth->h_dest[4])) &&
+ (dest_epid < hw->max_epid)) {
+ ;
+ } else {
+
+ dest_epid = 0;
+ max_epid = 0;
+ ret = NETDEV_TX_OK;
+
+ adapter->stats64.tx_packets += 1;
+ hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
+ adapter->stats64.tx_bytes += len;
+ hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
+
+ }
+ } else {
+
+ dest_epid = 0;
+ max_epid = 0;
+ ret = NETDEV_TX_OK;
+
+ adapter->stats64.tx_packets += 1;
+ hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
+ adapter->stats64.tx_bytes += len;
+ hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
+
+ }
+
+ for (; dest_epid < max_epid; dest_epid++) {
+
+ if (my_epid == dest_epid)
+ continue;
+
+ pstatus = fjes_hw_get_partner_ep_status(hw, dest_epid);
+ if (pstatus != EP_PARTNER_SHARED)
+ ret = NETDEV_TX_OK;
+ else if (!fjes_hw_check_epbuf_version(
+ &(adapter->hw.ep_shm_info[dest_epid].rx), 0)) {
+
+ /* version is NOT 0 */
+ adapter->stats64.tx_carrier_errors += 1;
+ hw->ep_shm_info[my_epid].net_stats.tx_carrier_errors += 1;
+
+ ret = NETDEV_TX_OK;
+ } else if (!fjes_hw_check_mtu(
+ &(adapter->hw.ep_shm_info[dest_epid].rx),
+ netdev->mtu)) {
+
+ adapter->stats64.tx_dropped += 1;
+ hw->ep_shm_info[my_epid].net_stats.tx_dropped += 1;
+ adapter->stats64.tx_errors += 1;
+ hw->ep_shm_info[my_epid].net_stats.tx_errors += 1;
+
+ ret = NETDEV_TX_OK;
+
+ } else if ((vlan == true) &&
+ !fjes_hw_check_vlan_id(
+ &(adapter->hw.ep_shm_info[dest_epid].rx),
+ vlan_id)) {
+
+ ret = NETDEV_TX_OK;
+
+ } else {
+
+ if (len < VLAN_ETH_HLEN) {
+ memset(shortpkt, 0, VLAN_ETH_HLEN);
+ memcpy(shortpkt, skb->data, skb->len);
+ len = VLAN_ETH_HLEN;
+ data = shortpkt;
+ }
+
+ if (adapter->tx_retry_count == 0) {
+ adapter->tx_start_jiffies = jiffies;
+ adapter->tx_retry_count = 1;
+ } else {
+ adapter->tx_retry_count++;
+ }
+
+ if (fjes_tx_send(adapter, dest_epid, data, len)) {
+
+ if (is_multi) {
+ ret = NETDEV_TX_OK;
+ } else if (
+ ((long)jiffies -
+ (long)adapter->tx_start_jiffies) >=
+ FJES_TX_RETRY_TIMEOUT) {
+
+ adapter->stats64.tx_fifo_errors += 1;
+ hw->ep_shm_info[my_epid].net_stats.tx_fifo_errors += 1;
+ adapter->stats64.tx_errors += 1;
+ hw->ep_shm_info[my_epid].net_stats.tx_errors += 1;
+
+ ret = NETDEV_TX_OK;
+ } else {
+
+ netdev->trans_start = jiffies;
+ netif_tx_stop_queue(cur_queue);
+
+ ret = NETDEV_TX_BUSY;
+ }
+ } else {
+
+ if (!is_multi) {
+ adapter->stats64.tx_packets += 1;
+ hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
+ adapter->stats64.tx_bytes += len;
+ hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
+ }
+
+ adapter->tx_retry_count = 0;
+ ret = NETDEV_TX_OK;
+
+ }
+ }
+ }
+
+
+ if (ret == NETDEV_TX_OK) {
+ dev_kfree_skb(skb);
+ if (is_multi) {
+ adapter->stats64.tx_packets += 1;
+ hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
+ adapter->stats64.tx_bytes += 1;
+ hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
+ }
+ }
+
+ return ret;
+}
+
static irqreturn_t fjes_intr(int irq, void *data)
{
struct fjes_adapter *adapter = data;
--
1.8.3.1
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