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Message-ID: <20230118113859.175836-10-yanchao.yang@mediatek.com>
Date: Wed, 18 Jan 2023 19:38:56 +0800
From: Yanchao Yang <yanchao.yang@...iatek.com>
To: Loic Poulain <loic.poulain@...aro.org>,
Sergey Ryazanov <ryazanov.s.a@...il.com>,
Johannes Berg <johannes@...solutions.net>,
"David S . Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
"Jakub Kicinski" <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
netdev ML <netdev@...r.kernel.org>,
kernel ML <linux-kernel@...r.kernel.org>
CC: Intel experts <linuxwwan@...el.com>,
Chetan <m.chetan.kumar@...el.com>,
MTK ML <linux-mediatek@...ts.infradead.org>,
Liang Lu <liang.lu@...iatek.com>,
Haijun Liu <haijun.liu@...iatek.com>,
Hua Yang <hua.yang@...iatek.com>,
Ting Wang <ting.wang@...iatek.com>,
Felix Chen <felix.chen@...iatek.com>,
Mingliang Xu <mingliang.xu@...iatek.com>,
Min Dong <min.dong@...iatek.com>,
Aiden Wang <aiden.wang@...iatek.com>,
Guohao Zhang <guohao.zhang@...iatek.com>,
Chris Feng <chris.feng@...iatek.com>,
"Yanchao Yang" <yanchao.yang@...iatek.com>,
Lambert Wang <lambert.wang@...iatek.com>,
Mingchuang Qiao <mingchuang.qiao@...iatek.com>,
Xiayu Zhang <xiayu.zhang@...iatek.com>,
Haozhe Chang <haozhe.chang@...iatek.com>
Subject: [PATCH net-next v2 09/12] net: wwan: tmi: Introduce WWAN interface
Creates the WWAN interface which implements the wwan_ops for registration with
the WWAN framework. WWAN interface also implements the net_device_ops functions
used by the network devices. Network device operations include open, stop,
start transmission and get states.
Signed-off-by: Yanchao Yang <yanchao.yang@...iatek.com>
Signed-off-by: Hua Yang <hua.yang@...iatek.com>
---
drivers/net/wwan/mediatek/Makefile | 4 +-
drivers/net/wwan/mediatek/mtk_data_plane.h | 25 +-
drivers/net/wwan/mediatek/mtk_dpmaif.c | 76 ++-
drivers/net/wwan/mediatek/mtk_dpmaif_drv.h | 10 +-
drivers/net/wwan/mediatek/mtk_ethtool.c | 179 ++++++
drivers/net/wwan/mediatek/mtk_wwan.c | 662 +++++++++++++++++++++
6 files changed, 943 insertions(+), 13 deletions(-)
create mode 100644 drivers/net/wwan/mediatek/mtk_ethtool.c
create mode 100644 drivers/net/wwan/mediatek/mtk_wwan.c
diff --git a/drivers/net/wwan/mediatek/Makefile b/drivers/net/wwan/mediatek/Makefile
index 8c37a7f9d598..6a5e699987ef 100644
--- a/drivers/net/wwan/mediatek/Makefile
+++ b/drivers/net/wwan/mediatek/Makefile
@@ -12,7 +12,9 @@ mtk_tmi-y = \
mtk_port.o \
mtk_port_io.o \
mtk_fsm.o \
- mtk_dpmaif.o
+ mtk_dpmaif.o \
+ mtk_wwan.o \
+ mtk_ethtool.o
ccflags-y += -I$(srctree)/$(src)/
ccflags-y += -I$(srctree)/$(src)/pcie/
diff --git a/drivers/net/wwan/mediatek/mtk_data_plane.h b/drivers/net/wwan/mediatek/mtk_data_plane.h
index 4daf3ec32c91..40c48b01e02c 100644
--- a/drivers/net/wwan/mediatek/mtk_data_plane.h
+++ b/drivers/net/wwan/mediatek/mtk_data_plane.h
@@ -22,11 +22,12 @@ enum mtk_data_feature {
DATA_F_RXFH = BIT(1),
DATA_F_INTR_COALESCE = BIT(2),
DATA_F_MULTI_NETDEV = BIT(16),
- DATA_F_ETH_PDN = BIT(17),
+ DATA_F_ETH_PDN = BIT(17)
};
struct mtk_data_blk {
struct mtk_md_dev *mdev;
+ struct mtk_wwan_ctlb *wcb;
struct mtk_dpmaif_ctlb *dcb;
};
@@ -85,6 +86,16 @@ struct mtk_data_trans_ops {
struct sk_buff *skb, u64 data);
};
+enum mtk_data_evt {
+ DATA_EVT_MIN,
+ DATA_EVT_TX_START,
+ DATA_EVT_TX_STOP,
+ DATA_EVT_RX_STOP,
+ DATA_EVT_REG_DEV,
+ DATA_EVT_UNREG_DEV,
+ DATA_EVT_MAX
+};
+
struct mtk_data_trans_info {
u32 cap;
unsigned char rxq_cnt;
@@ -93,9 +104,21 @@ struct mtk_data_trans_info {
struct napi_struct **napis;
};
+struct mtk_data_port_ops {
+ int (*init)(struct mtk_data_blk *data_blk, struct mtk_data_trans_info *trans_info);
+ void (*exit)(struct mtk_data_blk *data_blk);
+ int (*recv)(struct mtk_data_blk *data_blk, struct sk_buff *skb,
+ unsigned char q_id, unsigned char if_id);
+ void (*notify)(struct mtk_data_blk *data_blk, enum mtk_data_evt evt, u64 data);
+};
+
+void mtk_ethtool_set_ops(struct net_device *dev);
+int mtk_wwan_cmd_execute(struct net_device *dev, enum mtk_data_cmd_type cmd, void *data);
+u16 mtk_wwan_select_queue(struct net_device *dev, struct sk_buff *skb, struct net_device *sb_dev);
int mtk_data_init(struct mtk_md_dev *mdev);
int mtk_data_exit(struct mtk_md_dev *mdev);
+extern struct mtk_data_port_ops data_port_ops;
extern struct mtk_data_trans_ops data_trans_ops;
#endif /* __MTK_DATA_PLANE_H__ */
diff --git a/drivers/net/wwan/mediatek/mtk_dpmaif.c b/drivers/net/wwan/mediatek/mtk_dpmaif.c
index 36f247146bca..246b093a8cf6 100644
--- a/drivers/net/wwan/mediatek/mtk_dpmaif.c
+++ b/drivers/net/wwan/mediatek/mtk_dpmaif.c
@@ -426,6 +426,7 @@ enum dpmaif_dump_flag {
struct mtk_dpmaif_ctlb {
struct mtk_data_blk *data_blk;
+ struct mtk_data_port_ops *port_ops;
struct dpmaif_drv_info *drv_info;
struct napi_struct *napi[DPMAIF_RXQ_CNT_MAX];
@@ -707,10 +708,10 @@ static int mtk_dpmaif_reload_rx_page(struct mtk_dpmaif_ctlb *dcb,
page_info->offset = data - page_address(page_info->page);
page_info->data_len = bat_ring->buf_size;
page_info->data_dma_addr = dma_map_page(DCB_TO_MDEV(dcb)->dev,
- page_info->page,
- page_info->offset,
- page_info->data_len,
- DMA_FROM_DEVICE);
+ page_info->page,
+ page_info->offset,
+ page_info->data_len,
+ DMA_FROM_DEVICE);
ret = dma_mapping_error(DCB_TO_MDEV(dcb)->dev, page_info->data_dma_addr);
if (unlikely(ret)) {
dev_err(DCB_TO_MDEV(dcb)->dev, "Failed to map dma!\n");
@@ -1421,6 +1422,8 @@ static int mtk_dpmaif_tx_rel_internal(struct dpmaif_txq *txq,
txq->drb_rel_rd_idx = cur_idx;
atomic_inc(&txq->budget);
+ if (atomic_read(&txq->budget) > txq->drb_cnt / 8)
+ dcb->port_ops->notify(dcb->data_blk, DATA_EVT_TX_START, (u64)1 << txq->id);
}
*real_rel_cnt = i;
@@ -2795,6 +2798,40 @@ static int mtk_dpmaif_irq_exit(struct mtk_dpmaif_ctlb *dcb)
return 0;
}
+static int mtk_dpmaif_port_init(struct mtk_dpmaif_ctlb *dcb)
+{
+ struct mtk_data_trans_info trans_info;
+ struct dpmaif_rxq *rxq;
+ int ret;
+ int i;
+
+ memset(&trans_info, 0x00, sizeof(struct mtk_data_trans_info));
+ trans_info.cap = dcb->res_cfg->cap;
+ trans_info.txq_cnt = dcb->res_cfg->txq_cnt;
+ trans_info.rxq_cnt = dcb->res_cfg->rxq_cnt;
+ trans_info.max_mtu = dcb->bat_info.max_mtu;
+
+ for (i = 0; i < trans_info.rxq_cnt; i++) {
+ rxq = &dcb->rxqs[i];
+ dcb->napi[i] = &rxq->napi;
+ }
+ trans_info.napis = dcb->napi;
+
+ /* Initialize data port layer. */
+ dcb->port_ops = &data_port_ops;
+ ret = dcb->port_ops->init(dcb->data_blk, &trans_info);
+ if (ret < 0)
+ dev_err(DCB_TO_DEV(dcb),
+ "Failed to initialize data port layer, ret=%d\n", ret);
+
+ return ret;
+}
+
+static void mtk_dpmaif_port_exit(struct mtk_dpmaif_ctlb *dcb)
+{
+ dcb->port_ops->exit(dcb->data_blk);
+}
+
static int mtk_dpmaif_hw_init(struct mtk_dpmaif_ctlb *dcb)
{
struct dpmaif_bat_ring *bat_ring;
@@ -2940,11 +2977,18 @@ static int mtk_dpmaif_stop(struct mtk_dpmaif_ctlb *dcb)
*/
dcb->dpmaif_state = DPMAIF_STATE_PWROFF;
+ /* Stop data port layer tx. */
+ dcb->port_ops->notify(dcb->data_blk, DATA_EVT_TX_STOP, 0xff);
+
/* Stop all tx service. */
mtk_dpmaif_tx_srvs_stop(dcb);
/* Stop dpmaif tx/rx handle. */
mtk_dpmaif_trans_ctl(dcb, false);
+
+ /* Stop data port layer rx. */
+ dcb->port_ops->notify(dcb->data_blk, DATA_EVT_RX_STOP, 0xff);
+
out:
return 0;
}
@@ -2962,6 +3006,11 @@ static void mtk_dpmaif_fsm_callback(struct mtk_fsm_param *fsm_param, void *data)
case FSM_STATE_OFF:
mtk_dpmaif_stop(dcb);
+ /* Unregister data port, because data port will be
+ * registered again in FSM_STATE_READY stage.
+ */
+ dcb->port_ops->notify(dcb->data_blk, DATA_EVT_UNREG_DEV, 0);
+
/* Flush all cmd process. */
flush_work(&dcb->cmd_srv.work);
@@ -2973,6 +3022,7 @@ static void mtk_dpmaif_fsm_callback(struct mtk_fsm_param *fsm_param, void *data)
mtk_dpmaif_start(dcb);
break;
case FSM_STATE_READY:
+ dcb->port_ops->notify(dcb->data_blk, DATA_EVT_REG_DEV, 0);
break;
case FSM_STATE_MDEE:
if (fsm_param->fsm_flag == FSM_F_MDEE_INIT)
@@ -3056,6 +3106,12 @@ static int mtk_dpmaif_sw_init(struct mtk_data_blk *data_blk, const struct dpmaif
goto err_init_drv_res;
}
+ ret = mtk_dpmaif_port_init(dcb);
+ if (ret < 0) {
+ dev_err(DCB_TO_DEV(dcb), "Failed to initialize data port, ret=%d\n", ret);
+ goto err_init_port;
+ }
+
ret = mtk_dpmaif_fsm_init(dcb);
if (ret < 0) {
dev_err(DCB_TO_DEV(dcb), "Failed to initialize dpmaif fsm, ret=%d\n", ret);
@@ -3073,6 +3129,8 @@ static int mtk_dpmaif_sw_init(struct mtk_data_blk *data_blk, const struct dpmaif
err_init_irq:
mtk_dpmaif_fsm_exit(dcb);
err_init_fsm:
+ mtk_dpmaif_port_exit(dcb);
+err_init_port:
mtk_dpmaif_drv_res_exit(dcb);
err_init_drv_res:
mtk_dpmaif_cmd_srvs_exit(dcb);
@@ -3100,6 +3158,7 @@ static int mtk_dpmaif_sw_exit(struct mtk_data_blk *data_blk)
mtk_dpmaif_irq_exit(dcb);
mtk_dpmaif_fsm_exit(dcb);
+ mtk_dpmaif_port_exit(dcb);
mtk_dpmaif_drv_res_exit(dcb);
mtk_dpmaif_cmd_srvs_exit(dcb);
mtk_dpmaif_tx_srvs_exit(dcb);
@@ -3521,6 +3580,8 @@ static int mtk_dpmaif_rx_skb(struct dpmaif_rxq *rxq, struct dpmaif_rx_record *rx
skb_record_rx_queue(new_skb, rxq->id);
+ /* Send skb to data port. */
+ ret = dcb->port_ops->recv(dcb->data_blk, new_skb, rxq->id, rx_record->cur_ch_id);
dcb->traffic_stats.rx_packets[rxq->id]++;
out:
rx_record->lro_parent = NULL;
@@ -3883,10 +3944,13 @@ static int mtk_dpmaif_send_pkt(struct mtk_dpmaif_ctlb *dcb, struct sk_buff *skb,
vq = &dcb->tx_vqs[vq_id];
srv_id = dcb->res_cfg->tx_vq_srv_map[vq_id];
- if (likely(skb_queue_len(&vq->list) < vq->max_len))
+ if (likely(skb_queue_len(&vq->list) < vq->max_len)) {
skb_queue_tail(&vq->list, skb);
- else
+ } else {
+ /* Notify to data port layer, data port should carry off the net device tx queue. */
+ dcb->port_ops->notify(dcb->data_blk, DATA_EVT_TX_STOP, (u64)1 << vq_id);
ret = -EBUSY;
+ }
mtk_dpmaif_wake_up_tx_srv(&dcb->tx_srvs[srv_id]);
diff --git a/drivers/net/wwan/mediatek/mtk_dpmaif_drv.h b/drivers/net/wwan/mediatek/mtk_dpmaif_drv.h
index 29b6c99bba42..34ec846e6336 100644
--- a/drivers/net/wwan/mediatek/mtk_dpmaif_drv.h
+++ b/drivers/net/wwan/mediatek/mtk_dpmaif_drv.h
@@ -84,12 +84,12 @@ enum mtk_drv_err {
enum {
DPMAIF_CLEAR_INTR,
- DPMAIF_UNMASK_INTR,
+ DPMAIF_UNMASK_INTR
};
enum dpmaif_drv_dlq_id {
DPMAIF_DLQ0 = 0,
- DPMAIF_DLQ1,
+ DPMAIF_DLQ1
};
struct dpmaif_drv_dlq {
@@ -132,7 +132,7 @@ enum dpmaif_drv_ring_type {
DPMAIF_PIT,
DPMAIF_BAT,
DPMAIF_FRAG,
- DPMAIF_DRB,
+ DPMAIF_DRB
};
enum dpmaif_drv_ring_idx {
@@ -143,7 +143,7 @@ enum dpmaif_drv_ring_idx {
DPMAIF_FRAG_WIDX,
DPMAIF_FRAG_RIDX,
DPMAIF_DRB_WIDX,
- DPMAIF_DRB_RIDX,
+ DPMAIF_DRB_RIDX
};
struct dpmaif_drv_irq_en_mask {
@@ -184,7 +184,7 @@ enum dpmaif_drv_intr_type {
DPMAIF_INTR_DL_FRGCNT_LEN_ERR,
DPMAIF_INTR_DL_PITCNT_LEN_ERR,
DPMAIF_INTR_DL_DONE,
- DPMAIF_INTR_MAX
+ DPMAIF_INTR_MAX,
};
#define DPMAIF_INTR_COUNT ((DPMAIF_INTR_MAX) - (DPMAIF_INTR_MIN) - 1)
diff --git a/drivers/net/wwan/mediatek/mtk_ethtool.c b/drivers/net/wwan/mediatek/mtk_ethtool.c
new file mode 100644
index 000000000000..b052d41027c2
--- /dev/null
+++ b/drivers/net/wwan/mediatek/mtk_ethtool.c
@@ -0,0 +1,179 @@
+// SPDX-License-Identifier: BSD-3-Clause-Clear
+/*
+ * Copyright (c) 2022, MediaTek Inc.
+ */
+
+#include <linux/ethtool.h>
+#include <linux/netdevice.h>
+
+#include "mtk_data_plane.h"
+
+#define MTK_MAX_COALESCE_TIME 3
+#define MTK_MAX_COALESCE_FRAMES 1000
+
+static int mtk_ethtool_cmd_execute(struct net_device *dev, enum mtk_data_cmd_type cmd, void *data)
+{
+ return mtk_wwan_cmd_execute(dev, cmd, data);
+}
+
+static void mtk_ethtool_get_strings(struct net_device *dev, u32 sset, u8 *data)
+{
+ if (sset != ETH_SS_STATS)
+ return;
+
+ mtk_ethtool_cmd_execute(dev, DATA_CMD_STRING_GET, data);
+}
+
+static int mtk_ethtool_get_sset_count(struct net_device *dev, int sset)
+{
+ int s_count = 0;
+ int ret;
+
+ if (sset != ETH_SS_STATS)
+ return -EOPNOTSUPP;
+
+ ret = mtk_ethtool_cmd_execute(dev, DATA_CMD_STRING_CNT_GET, &s_count);
+
+ if (ret)
+ return ret;
+
+ return s_count;
+}
+
+static void mtk_ethtool_get_stats(struct net_device *dev,
+ struct ethtool_stats *stats, u64 *data)
+{
+ mtk_ethtool_cmd_execute(dev, DATA_CMD_TRANS_DUMP, data);
+}
+
+static int mtk_ethtool_get_coalesce(struct net_device *dev,
+ struct ethtool_coalesce *ec,
+ struct kernel_ethtool_coalesce *kec,
+ struct netlink_ext_ack *ack)
+{
+ struct mtk_data_intr_coalesce intr_get;
+ int ret;
+
+ ret = mtk_ethtool_cmd_execute(dev, DATA_CMD_INTR_COALESCE_GET, &intr_get);
+
+ if (ret)
+ return ret;
+
+ ec->rx_coalesce_usecs = intr_get.rx_coalesce_usecs;
+ ec->tx_coalesce_usecs = intr_get.tx_coalesce_usecs;
+ ec->rx_max_coalesced_frames = intr_get.rx_coalesced_frames;
+ ec->tx_max_coalesced_frames = intr_get.tx_coalesced_frames;
+
+ return 0;
+}
+
+static int mtk_ethtool_set_coalesce(struct net_device *dev,
+ struct ethtool_coalesce *ec,
+ struct kernel_ethtool_coalesce *kec,
+ struct netlink_ext_ack *ack)
+{
+ struct mtk_data_intr_coalesce intr_set;
+
+ if (ec->rx_coalesce_usecs > MTK_MAX_COALESCE_TIME)
+ return -EINVAL;
+ if (ec->tx_coalesce_usecs > MTK_MAX_COALESCE_TIME)
+ return -EINVAL;
+ if (ec->rx_max_coalesced_frames > MTK_MAX_COALESCE_FRAMES)
+ return -EINVAL;
+ if (ec->tx_max_coalesced_frames > MTK_MAX_COALESCE_FRAMES)
+ return -EINVAL;
+
+ intr_set.rx_coalesce_usecs = ec->rx_coalesce_usecs;
+ intr_set.tx_coalesce_usecs = ec->tx_coalesce_usecs;
+ intr_set.rx_coalesced_frames = ec->rx_max_coalesced_frames;
+ intr_set.tx_coalesced_frames = ec->tx_max_coalesced_frames;
+
+ return mtk_ethtool_cmd_execute(dev, DATA_CMD_INTR_COALESCE_SET, &intr_set);
+}
+
+static int mtk_ethtool_get_rxfh(struct net_device *dev, u32 *indir, u8 *key, u8 *hfunc)
+{
+ struct mtk_data_rxfh rxfh;
+
+ if (!indir && !key)
+ return 0;
+
+ if (hfunc)
+ *hfunc = ETH_RSS_HASH_TOP;
+
+ rxfh.indir = indir;
+ rxfh.key = key;
+
+ return mtk_ethtool_cmd_execute(dev, DATA_CMD_RXFH_GET, &rxfh);
+}
+
+static int mtk_ethtool_set_rxfh(struct net_device *dev, const u32 *indir,
+ const u8 *key, const u8 hfunc)
+{
+ struct mtk_data_rxfh rxfh;
+
+ if (hfunc != ETH_RSS_HASH_NO_CHANGE)
+ return -EOPNOTSUPP;
+
+ if (!indir && !key)
+ return 0;
+
+ rxfh.indir = (u32 *)indir;
+ rxfh.key = (u8 *)key;
+
+ return mtk_ethtool_cmd_execute(dev, DATA_CMD_RXFH_SET, &rxfh);
+}
+
+static int mtk_ethtool_get_rxfhc(struct net_device *dev,
+ struct ethtool_rxnfc *rxnfc, u32 *rule_locs)
+{
+ u32 rx_rings;
+ int ret;
+
+ /* Only supported %ETHTOOL_GRXRINGS */
+ if (!rxnfc || rxnfc->cmd != ETHTOOL_GRXRINGS)
+ return -EOPNOTSUPP;
+
+ ret = mtk_ethtool_cmd_execute(dev, DATA_CMD_RXQ_NUM_GET, &rx_rings);
+ if (!ret)
+ rxnfc->data = rx_rings;
+
+ return ret;
+}
+
+static u32 mtk_ethtool_get_indir_size(struct net_device *dev)
+{
+ u32 indir_size = 0;
+
+ mtk_ethtool_cmd_execute(dev, DATA_CMD_INDIR_SIZE_GET, &indir_size);
+
+ return indir_size;
+}
+
+static u32 mtk_ethtool_get_hkey_size(struct net_device *dev)
+{
+ u32 hkey_size = 0;
+
+ mtk_ethtool_cmd_execute(dev, DATA_CMD_HKEY_SIZE_GET, &hkey_size);
+
+ return hkey_size;
+}
+
+static const struct ethtool_ops mtk_wwan_ethtool_ops = {
+ .supported_coalesce_params = ETHTOOL_COALESCE_USECS | ETHTOOL_COALESCE_MAX_FRAMES,
+ .get_ethtool_stats = mtk_ethtool_get_stats,
+ .get_sset_count = mtk_ethtool_get_sset_count,
+ .get_strings = mtk_ethtool_get_strings,
+ .get_coalesce = mtk_ethtool_get_coalesce,
+ .set_coalesce = mtk_ethtool_set_coalesce,
+ .get_rxfh = mtk_ethtool_get_rxfh,
+ .set_rxfh = mtk_ethtool_set_rxfh,
+ .get_rxnfc = mtk_ethtool_get_rxfhc,
+ .get_rxfh_indir_size = mtk_ethtool_get_indir_size,
+ .get_rxfh_key_size = mtk_ethtool_get_hkey_size,
+};
+
+void mtk_ethtool_set_ops(struct net_device *dev)
+{
+ dev->ethtool_ops = &mtk_wwan_ethtool_ops;
+}
diff --git a/drivers/net/wwan/mediatek/mtk_wwan.c b/drivers/net/wwan/mediatek/mtk_wwan.c
new file mode 100644
index 000000000000..e232d403a983
--- /dev/null
+++ b/drivers/net/wwan/mediatek/mtk_wwan.c
@@ -0,0 +1,662 @@
+// SPDX-License-Identifier: BSD-3-Clause-Clear
+/*
+ * Copyright (c) 2022, MediaTek Inc.
+ */
+
+#include <linux/completion.h>
+#include <linux/etherdevice.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/types.h>
+#include <linux/wwan.h>
+#include <net/pkt_sched.h>
+#include <uapi/linux/if.h>
+#include <uapi/linux/if_arp.h>
+#include <uapi/linux/if_link.h>
+
+#include "mtk_data_plane.h"
+#include "mtk_dev.h"
+
+#define MTK_NETDEV_MAX 20
+#define MTK_DFLT_INTF_ID 0
+#define MTK_NETDEV_WDT (HZ)
+#define MTK_CMD_WDT (HZ)
+#define MTK_MAX_INTF_ID (MTK_NETDEV_MAX - 1)
+#define MTK_NAPI_POLL_WEIGHT 128
+
+static unsigned int napi_budget = MTK_NAPI_POLL_WEIGHT;
+
+/**
+ * struct mtk_wwan_instance - Information about netdevice.
+ * @wcb: Contains all information about WWAN port layer.
+ * @stats: Statistics of netdevice's tx/rx packets.
+ * @tx_busy: Statistics of netdevice's busy counts.
+ * @netdev: Pointer to netdevice structure.
+ * @intf_id: The netdevice's interface id
+ */
+struct mtk_wwan_instance {
+ struct mtk_wwan_ctlb *wcb;
+ struct rtnl_link_stats64 stats;
+ unsigned long long tx_busy;
+ struct net_device *netdev;
+ unsigned int intf_id;
+};
+
+/**
+ * struct mtk_wwan_ctlb - Information about port layer and needed trans layer.
+ * @data_blk: Contains data port, trans layer, md_dev structure.
+ * @mdev: Pointer of mtk_md_dev.
+ * @trans_ops: Contains trans layer ops: send, select_txq, napi_poll.
+ * @wwan_inst: Instance of network device.
+ * @napis: Trans layer alloc napi structure by rx queue.
+ * @dummy_dev: Used for multiple network devices share one napi.
+ * @cap: Contains different hardware capabilities.
+ * @max_mtu: The max MTU supported.
+ * @napi_enabled: Mark for napi state.
+ * @active_cnt: The counter of network devices that are UP.
+ * @txq_num: Total TX qdisc number.
+ * @rxq_num: Total RX qdisc number.
+ * @reg_done: Mark for ntwork devices register state.
+ */
+struct mtk_wwan_ctlb {
+ struct mtk_data_blk *data_blk;
+ struct mtk_md_dev *mdev;
+ struct mtk_data_trans_ops *trans_ops;
+ struct mtk_wwan_instance __rcu *wwan_inst[MTK_NETDEV_MAX];
+ struct napi_struct **napis;
+ struct net_device dummy_dev;
+
+ u32 cap;
+ atomic_t napi_enabled;
+ unsigned int max_mtu;
+ unsigned int active_cnt;
+ unsigned char txq_num;
+ unsigned char rxq_num;
+ bool reg_done;
+};
+
+static void mtk_wwan_set_skb(struct sk_buff *skb, struct net_device *netdev)
+{
+ unsigned int pkt_type;
+
+ pkt_type = skb->data[0] & 0xF0;
+
+ if (pkt_type == IPV4_VERSION)
+ skb->protocol = htons(ETH_P_IP);
+ else
+ skb->protocol = htons(ETH_P_IPV6);
+
+ skb->dev = netdev;
+}
+
+static int mtk_wwan_data_recv(struct mtk_data_blk *data_blk, struct sk_buff *skb,
+ unsigned char q_id, unsigned char intf_id)
+{
+ struct mtk_wwan_instance *wwan_inst;
+ struct net_device *netdev;
+ struct napi_struct *napi;
+
+ if (unlikely(!data_blk || !data_blk->wcb))
+ goto err_rx;
+
+ if (intf_id > MTK_MAX_INTF_ID) {
+ dev_err(data_blk->mdev->dev, "Invalid interface id=%d\n", intf_id);
+ goto err_rx;
+ }
+
+ rcu_read_lock();
+ wwan_inst = rcu_dereference(data_blk->wcb->wwan_inst[intf_id]);
+
+ if (unlikely(!wwan_inst)) {
+ dev_err(data_blk->mdev->dev, "Invalid pointer wwan_inst is NULL\n");
+ rcu_read_unlock();
+ goto err_rx;
+ }
+
+ napi = data_blk->wcb->napis[q_id];
+ netdev = wwan_inst->netdev;
+
+ mtk_wwan_set_skb(skb, netdev);
+
+ wwan_inst->stats.rx_packets++;
+ wwan_inst->stats.rx_bytes += skb->len;
+
+ napi_gro_receive(napi, skb);
+
+ rcu_read_unlock();
+ return 0;
+
+err_rx:
+ dev_kfree_skb_any(skb);
+ return -EINVAL;
+}
+
+static void mtk_wwan_napi_enable(struct mtk_wwan_ctlb *wcb)
+{
+ int i;
+
+ if (atomic_cmpxchg(&wcb->napi_enabled, 0, 1) == 0) {
+ for (i = 0; i < wcb->rxq_num; i++)
+ napi_enable(wcb->napis[i]);
+ }
+}
+
+static void mtk_wwan_napi_disable(struct mtk_wwan_ctlb *wcb)
+{
+ int i;
+
+ if (atomic_cmpxchg(&wcb->napi_enabled, 1, 0) == 1) {
+ for (i = 0; i < wcb->rxq_num; i++) {
+ napi_synchronize(wcb->napis[i]);
+ napi_disable(wcb->napis[i]);
+ }
+ }
+}
+
+static int mtk_wwan_open(struct net_device *dev)
+{
+ struct mtk_wwan_instance *wwan_inst = wwan_netdev_drvpriv(dev);
+ struct mtk_wwan_ctlb *wcb = wwan_inst->wcb;
+ struct mtk_data_trans_ctl trans_ctl;
+ int ret;
+
+ if (wcb->active_cnt == 0) {
+ mtk_wwan_napi_enable(wcb);
+ trans_ctl.enable = true;
+ ret = mtk_wwan_cmd_execute(dev, DATA_CMD_TRANS_CTL, &trans_ctl);
+ if (ret < 0) {
+ dev_err(wcb->mdev->dev, "Failed to enable trans\n");
+ goto err_ctl;
+ }
+ }
+
+ wcb->active_cnt++;
+
+ netif_tx_start_all_queues(dev);
+ netif_carrier_on(dev);
+
+ return 0;
+
+err_ctl:
+ mtk_wwan_napi_disable(wcb);
+ return ret;
+}
+
+static int mtk_wwan_stop(struct net_device *dev)
+{
+ struct mtk_wwan_instance *wwan_inst = wwan_netdev_drvpriv(dev);
+ struct mtk_wwan_ctlb *wcb = wwan_inst->wcb;
+ struct mtk_data_trans_ctl trans_ctl;
+ int ret;
+
+ netif_carrier_off(dev);
+ netif_tx_disable(dev);
+
+ if (wcb->active_cnt == 1) {
+ trans_ctl.enable = false;
+ ret = mtk_wwan_cmd_execute(dev, DATA_CMD_TRANS_CTL, &trans_ctl);
+ if (ret < 0)
+ dev_err(wcb->mdev->dev, "Failed to disable trans\n");
+ mtk_wwan_napi_disable(wcb);
+ }
+ wcb->active_cnt--;
+
+ return 0;
+}
+
+static void mtk_wwan_select_txq(struct mtk_wwan_instance *wwan_inst, struct sk_buff *skb,
+ enum mtk_pkt_type pkt_type)
+{
+ u16 qid;
+
+ qid = wwan_inst->wcb->trans_ops->select_txq(skb, pkt_type);
+ if (qid > wwan_inst->wcb->txq_num)
+ qid = 0;
+
+ skb_set_queue_mapping(skb, qid);
+}
+
+static netdev_tx_t mtk_wwan_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct mtk_wwan_instance *wwan_inst = wwan_netdev_drvpriv(dev);
+ unsigned int intf_id = wwan_inst->intf_id;
+ unsigned int skb_len = skb->len;
+ int ret;
+
+ if (unlikely(skb->len > dev->mtu)) {
+ dev_err(wwan_inst->wcb->mdev->dev,
+ "Failed to write skb,netdev=%s,len=0x%x,MTU=0x%x\n",
+ dev->name, skb->len, dev->mtu);
+ goto err_tx;
+ }
+
+ /* select trans layer virtual queue */
+ mtk_wwan_select_txq(wwan_inst, skb, PURE_IP);
+
+ /* Forward skb to trans layer(DPMAIF). */
+ ret = wwan_inst->wcb->trans_ops->send(wwan_inst->wcb->data_blk, DATA_PKT, skb, intf_id);
+ if (ret == -EBUSY) {
+ wwan_inst->tx_busy++;
+ return NETDEV_TX_BUSY;
+ } else if (ret == -EINVAL) {
+ goto err_tx;
+ }
+
+ wwan_inst->stats.tx_packets++;
+ wwan_inst->stats.tx_bytes += skb_len;
+ goto out;
+
+err_tx:
+ wwan_inst->stats.tx_errors++;
+ wwan_inst->stats.tx_dropped++;
+ dev_kfree_skb_any(skb);
+out:
+ return NETDEV_TX_OK;
+}
+
+static void mtk_wwan_get_stats(struct net_device *dev, struct rtnl_link_stats64 *stats)
+{
+ struct mtk_wwan_instance *wwan_inst = wwan_netdev_drvpriv(dev);
+
+ memcpy(stats, &wwan_inst->stats, sizeof(*stats));
+}
+
+static const struct net_device_ops mtk_netdev_ops = {
+ .ndo_open = mtk_wwan_open,
+ .ndo_stop = mtk_wwan_stop,
+ .ndo_start_xmit = mtk_wwan_start_xmit,
+ .ndo_get_stats64 = mtk_wwan_get_stats,
+};
+
+static void mtk_wwan_cmd_complete(void *data)
+{
+ struct mtk_data_cmd *event;
+ struct sk_buff *skb = data;
+
+ event = (struct mtk_data_cmd *)skb->data;
+ complete(&event->done);
+}
+
+static int mtk_wwan_cmd_check(struct net_device *dev, enum mtk_data_cmd_type cmd)
+{
+ struct mtk_wwan_instance *wwan_inst = wwan_netdev_drvpriv(dev);
+ int ret = 0;
+
+ switch (cmd) {
+ case DATA_CMD_INTR_COALESCE_GET:
+ fallthrough;
+ case DATA_CMD_INTR_COALESCE_SET:
+ if (!(wwan_inst->wcb->cap & DATA_F_INTR_COALESCE))
+ ret = -EOPNOTSUPP;
+ break;
+ case DATA_CMD_INDIR_SIZE_GET:
+ fallthrough;
+ case DATA_CMD_HKEY_SIZE_GET:
+ fallthrough;
+ case DATA_CMD_RXFH_GET:
+ fallthrough;
+ case DATA_CMD_RXFH_SET:
+ if (!(wwan_inst->wcb->cap & DATA_F_RXFH))
+ ret = -EOPNOTSUPP;
+ break;
+ case DATA_CMD_RXQ_NUM_GET:
+ fallthrough;
+ case DATA_CMD_TRANS_DUMP:
+ fallthrough;
+ case DATA_CMD_STRING_CNT_GET:
+ fallthrough;
+ case DATA_CMD_STRING_GET:
+ break;
+ case DATA_CMD_TRANS_CTL:
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+
+ return ret;
+}
+
+static struct sk_buff *mtk_wwan_cmd_alloc(enum mtk_data_cmd_type cmd, unsigned int len)
+
+{
+ struct mtk_data_cmd *event;
+ struct sk_buff *skb;
+
+ skb = dev_alloc_skb(sizeof(*event) + len);
+ if (unlikely(!skb))
+ return NULL;
+
+ skb_put(skb, len + sizeof(*event));
+ event = (struct mtk_data_cmd *)skb->data;
+ event->cmd = cmd;
+ event->len = len;
+
+ init_completion(&event->done);
+ event->data_complete = mtk_wwan_cmd_complete;
+
+ return skb;
+}
+
+static int mtk_wwan_cmd_send(struct net_device *dev, struct sk_buff *skb)
+{
+ struct mtk_wwan_instance *wwan_inst = wwan_netdev_drvpriv(dev);
+ struct mtk_data_cmd *event = (struct mtk_data_cmd *)skb->data;
+ int ret;
+
+ ret = wwan_inst->wcb->trans_ops->send(wwan_inst->wcb->data_blk, DATA_CMD, skb, 0);
+ if (ret < 0)
+ return ret;
+
+ if (!wait_for_completion_timeout(&event->done, MTK_CMD_WDT))
+ return -ETIMEDOUT;
+
+ if (event->ret < 0)
+ return event->ret;
+
+ return 0;
+}
+
+int mtk_wwan_cmd_execute(struct net_device *dev,
+ enum mtk_data_cmd_type cmd, void *data)
+{
+ struct mtk_wwan_instance *wwan_inst;
+ struct sk_buff *skb;
+ int ret;
+
+ if (mtk_wwan_cmd_check(dev, cmd))
+ return -EOPNOTSUPP;
+
+ skb = mtk_wwan_cmd_alloc(cmd, sizeof(void *));
+ if (unlikely(!skb))
+ return -ENOMEM;
+
+ SKB_TO_CMD_DATA(skb) = data;
+
+ ret = mtk_wwan_cmd_send(dev, skb);
+ if (ret < 0) {
+ wwan_inst = wwan_netdev_drvpriv(dev);
+ dev_err(wwan_inst->wcb->mdev->dev,
+ "Failed to excute command:ret=%d,cmd=%d\n", ret, cmd);
+ }
+
+ if (likely(skb))
+ dev_kfree_skb_any(skb);
+
+ return ret;
+}
+
+static int mtk_wwan_start_txq(struct mtk_wwan_ctlb *wcb, u32 qmask)
+{
+ struct mtk_wwan_instance *wwan_inst;
+ struct net_device *dev;
+ int i;
+
+ rcu_read_lock();
+ /* All wwan network devices share same HIF queue */
+ for (i = 0; i < MTK_NETDEV_MAX; i++) {
+ wwan_inst = rcu_dereference(wcb->wwan_inst[i]);
+ if (!wwan_inst)
+ continue;
+
+ dev = wwan_inst->netdev;
+
+ if (!(dev->flags & IFF_UP))
+ continue;
+
+ netif_tx_wake_all_queues(dev);
+ netif_carrier_on(dev);
+ }
+ rcu_read_unlock();
+
+ return 0;
+}
+
+static int mtk_wwan_stop_txq(struct mtk_wwan_ctlb *wcb, u32 qmask)
+{
+ struct mtk_wwan_instance *wwan_inst;
+ struct net_device *dev;
+ int i;
+
+ rcu_read_lock();
+ /* All wwan network devices share same HIF queue */
+ for (i = 0; i < MTK_NETDEV_MAX; i++) {
+ wwan_inst = rcu_dereference(wcb->wwan_inst[i]);
+ if (!wwan_inst)
+ continue;
+
+ dev = wwan_inst->netdev;
+
+ if (!(dev->flags & IFF_UP))
+ continue;
+
+ netif_carrier_off(dev);
+ /* the network transmit lock has already been held in the ndo_start_xmit context */
+ netif_tx_stop_all_queues(dev);
+ }
+ rcu_read_unlock();
+
+ return 0;
+}
+
+static void mtk_wwan_napi_exit(struct mtk_wwan_ctlb *wcb)
+{
+ int i;
+
+ for (i = 0; i < wcb->rxq_num; i++) {
+ if (!wcb->napis[i])
+ continue;
+ netif_napi_del(wcb->napis[i]);
+ }
+}
+
+static int mtk_wwan_napi_init(struct mtk_wwan_ctlb *wcb, struct net_device *dev)
+{
+ int i;
+
+ for (i = 0; i < wcb->rxq_num; i++) {
+ if (!wcb->napis[i]) {
+ dev_err(wcb->mdev->dev, "Invalid napi pointer, napi=%d", i);
+ goto err;
+ }
+ netif_napi_add_weight(dev, wcb->napis[i], wcb->trans_ops->poll, napi_budget);
+ }
+
+ return 0;
+
+err:
+ for (--i; i >= 0; i--)
+ netif_napi_del(wcb->napis[i]);
+ return -EINVAL;
+}
+
+static void mtk_wwan_setup(struct net_device *dev)
+{
+ dev->watchdog_timeo = MTK_NETDEV_WDT;
+ dev->mtu = ETH_DATA_LEN;
+ dev->min_mtu = ETH_MIN_MTU;
+
+ dev->features = NETIF_F_SG;
+ dev->hw_features = NETIF_F_SG;
+
+ dev->features |= NETIF_F_HW_CSUM;
+ dev->hw_features |= NETIF_F_HW_CSUM;
+
+ dev->features |= NETIF_F_RXCSUM;
+ dev->hw_features |= NETIF_F_RXCSUM;
+
+ dev->features |= NETIF_F_GRO;
+ dev->hw_features |= NETIF_F_GRO;
+
+ dev->features |= NETIF_F_RXHASH;
+ dev->hw_features |= NETIF_F_RXHASH;
+
+ dev->addr_len = ETH_ALEN;
+ dev->tx_queue_len = DEFAULT_TX_QUEUE_LEN;
+
+ /* Pure IP device. */
+ dev->flags = IFF_NOARP;
+ dev->type = ARPHRD_NONE;
+
+ dev->needs_free_netdev = true;
+
+ dev->netdev_ops = &mtk_netdev_ops;
+ mtk_ethtool_set_ops(dev);
+}
+
+static int mtk_wwan_newlink(void *ctxt, struct net_device *dev, u32 intf_id,
+ struct netlink_ext_ack *extack)
+{
+ struct mtk_wwan_instance *wwan_inst = wwan_netdev_drvpriv(dev);
+ struct mtk_wwan_ctlb *wcb = ctxt;
+ int ret;
+
+ if (intf_id > MTK_MAX_INTF_ID) {
+ ret = -EINVAL;
+ goto err;
+ }
+
+ dev->max_mtu = wcb->max_mtu;
+
+ wwan_inst->wcb = wcb;
+ wwan_inst->netdev = dev;
+ wwan_inst->intf_id = intf_id;
+
+ if (rcu_access_pointer(wcb->wwan_inst[intf_id])) {
+ ret = -EBUSY;
+ goto err;
+ }
+
+ ret = register_netdevice(dev);
+ if (ret)
+ goto err;
+
+ rcu_assign_pointer(wcb->wwan_inst[intf_id], wwan_inst);
+
+ netif_device_attach(dev);
+
+ return 0;
+err:
+ return ret;
+}
+
+static void mtk_wwan_dellink(void *ctxt, struct net_device *dev,
+ struct list_head *head)
+{
+ struct mtk_wwan_instance *wwan_inst = wwan_netdev_drvpriv(dev);
+ int intf_id = wwan_inst->intf_id;
+ struct mtk_wwan_ctlb *wcb = ctxt;
+
+ if (WARN_ON(rcu_access_pointer(wcb->wwan_inst[intf_id]) != wwan_inst))
+ return;
+
+ RCU_INIT_POINTER(wcb->wwan_inst[intf_id], NULL);
+ unregister_netdevice_queue(dev, head);
+}
+
+static const struct wwan_ops mtk_wwan_ops = {
+ .priv_size = sizeof(struct mtk_wwan_instance),
+ .setup = mtk_wwan_setup,
+ .newlink = mtk_wwan_newlink,
+ .dellink = mtk_wwan_dellink,
+};
+
+static void mtk_wwan_notify(struct mtk_data_blk *data_blk, enum mtk_data_evt evt, u64 data)
+{
+ struct mtk_wwan_ctlb *wcb;
+
+ if (unlikely(!data_blk || !data_blk->wcb))
+ return;
+
+ wcb = data_blk->wcb;
+
+ switch (evt) {
+ case DATA_EVT_TX_START:
+ mtk_wwan_start_txq(wcb, data);
+ break;
+ case DATA_EVT_TX_STOP:
+ mtk_wwan_stop_txq(wcb, data);
+ break;
+
+ case DATA_EVT_RX_STOP:
+ mtk_wwan_napi_disable(wcb);
+ break;
+
+ case DATA_EVT_REG_DEV:
+ if (!wcb->reg_done) {
+ wwan_register_ops(wcb->mdev->dev, &mtk_wwan_ops, wcb, MTK_DFLT_INTF_ID);
+ wcb->reg_done = true;
+ }
+ break;
+
+ case DATA_EVT_UNREG_DEV:
+ if (wcb->reg_done) {
+ wwan_unregister_ops(wcb->mdev->dev);
+ wcb->reg_done = false;
+ }
+ break;
+
+ default:
+ break;
+ }
+}
+
+static int mtk_wwan_init(struct mtk_data_blk *data_blk, struct mtk_data_trans_info *trans_info)
+{
+ struct mtk_wwan_ctlb *wcb;
+ int ret;
+
+ if (unlikely(!data_blk || !trans_info))
+ return -EINVAL;
+
+ wcb = devm_kzalloc(data_blk->mdev->dev, sizeof(*wcb), GFP_KERNEL);
+ if (unlikely(!wcb))
+ return -ENOMEM;
+
+ wcb->trans_ops = &data_trans_ops;
+ wcb->mdev = data_blk->mdev;
+ wcb->data_blk = data_blk;
+ wcb->napis = trans_info->napis;
+ wcb->max_mtu = trans_info->max_mtu;
+ wcb->cap = trans_info->cap;
+ wcb->rxq_num = trans_info->rxq_cnt;
+ wcb->txq_num = trans_info->txq_cnt;
+ atomic_set(&wcb->napi_enabled, 0);
+ init_dummy_netdev(&wcb->dummy_dev);
+
+ data_blk->wcb = wcb;
+
+ /* Multiple virtual network devices share one physical device,
+ * so we use dummy device to enable NAPI for multiple virtual network devices.
+ */
+ ret = mtk_wwan_napi_init(wcb, &wcb->dummy_dev);
+ if (ret < 0)
+ goto err_napi_init;
+
+ return 0;
+err_napi_init:
+ devm_kfree(data_blk->mdev->dev, wcb);
+ data_blk->wcb = NULL;
+
+ return ret;
+}
+
+static void mtk_wwan_exit(struct mtk_data_blk *data_blk)
+{
+ struct mtk_wwan_ctlb *wcb;
+
+ if (unlikely(!data_blk || !data_blk->wcb))
+ return;
+
+ wcb = data_blk->wcb;
+ mtk_wwan_napi_exit(wcb);
+ devm_kfree(data_blk->mdev->dev, wcb);
+ data_blk->wcb = NULL;
+}
+
+struct mtk_data_port_ops data_port_ops = {
+ .init = mtk_wwan_init,
+ .exit = mtk_wwan_exit,
+ .recv = mtk_wwan_data_recv,
+ .notify = mtk_wwan_notify,
+};
--
2.32.0
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