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Message-id: <005201cf3df6$e4677bb0$ad367310$%an@samsung.com>
Date: Wed, 12 Mar 2014 22:28:01 +0900
From: Byungho An <bh74.an@...sung.com>
To: netdev@...r.kernel.org, linux-samsung-soc@...r.kernel.org
Cc: davem@...emloft.net, vipul.pandya@...sung.com,
ilho215.lee@...sung.com
Subject: [PATCH V2 2/7] net: sxgbe: add TSO support for Samsung sxgbe
From: Vipul Pandya <vipul.pandya@...sung.com>
Enable TSO during initialization for each DMA channels
Signed-off-by: Vipul Pandya <vipul.pandya@...sung.com>
Neatening-by: Joe Perches <joe@...ches.com>
Signed-off-by: Byungho An <bh74.an@...sung.com>
---
drivers/net/ethernet/samsung/sxgbe_desc.c | 47 +++++++++++++++---
drivers/net/ethernet/samsung/sxgbe_desc.h | 17 +++++--
drivers/net/ethernet/samsung/sxgbe_dma.c | 10 ++++
drivers/net/ethernet/samsung/sxgbe_dma.h | 2 +
drivers/net/ethernet/samsung/sxgbe_main.c | 75
++++++++++++++++++++++++++---
5 files changed, 130 insertions(+), 21 deletions(-)
diff --git a/drivers/net/ethernet/samsung/sxgbe_desc.c
b/drivers/net/ethernet/samsung/sxgbe_desc.c
index 7577375..f223eb5 100644
--- a/drivers/net/ethernet/samsung/sxgbe_desc.c
+++ b/drivers/net/ethernet/samsung/sxgbe_desc.c
@@ -28,6 +28,16 @@ static void sxgbe_init_tx_desc(struct sxgbe_tx_norm_desc
*p)
p->tdes23.tx_rd_des23.own_bit = 0;
}
+static void sxgbe_tx_desc_enable_tse(struct sxgbe_tx_norm_desc *p, u8
is_tse,
+ u32 total_hdr_len, u32 tcp_hdr_len,
+ u32 tcp_payload_len)
+{
+ p->tdes23.tx_rd_des23.tse_bit = is_tse;
+ p->tdes23.tx_rd_des23.buf1_size = total_hdr_len;
+ p->tdes23.tx_rd_des23.tcp_hdr_len = tcp_hdr_len / 4;
+ p->tdes23.tx_rd_des23.tx_pkt_len.tcp_payload_len = tcp_payload_len;
+}
+
/* Assign buffer lengths for descriptor */
static void sxgbe_prepare_tx_desc(struct sxgbe_tx_norm_desc *p, u8 is_fd,
int buf1_len, int pkt_len, int cksum)
@@ -102,36 +112,47 @@ static int sxgbe_get_tx_timestamp_status(struct
sxgbe_tx_norm_desc *p)
}
/* TX Context Descripto Specific */
-static void sxgbe_init_tx_ctxtdesc(struct sxgbe_tx_ctxt_desc *p)
+static void sxgbe_tx_ctxt_desc_set_ctxt(struct sxgbe_tx_ctxt_desc *p)
{
p->ctxt_bit = 1;
- p->own_bit = 0;
}
/* Set the owner of TX context descriptor */
-static void sxgbe_set_tx_ctxt_owner(struct sxgbe_tx_ctxt_desc *p)
+static void sxgbe_tx_ctxt_desc_set_owner(struct sxgbe_tx_ctxt_desc *p)
{
p->own_bit = 1;
}
/* Get the owner of TX context descriptor */
-static int sxgbe_get_tx_ctxt_owner(struct sxgbe_tx_ctxt_desc *p)
+static int sxgbe_tx_ctxt_desc_get_owner(struct sxgbe_tx_ctxt_desc *p)
{
return p->own_bit;
}
/* Set TX mss in TX context Descriptor */
-static void sxgbe_tx_ctxt_desc_setmss(struct sxgbe_tx_ctxt_desc *p, int
mss)
+static void sxgbe_tx_ctxt_desc_set_mss(struct sxgbe_tx_ctxt_desc *p, u16
mss)
{
p->maxseg_size = mss;
}
/* Get TX mss from TX context Descriptor */
-static int sxgbe_tx_ctxt_desc_getmss(struct sxgbe_tx_ctxt_desc *p)
+static int sxgbe_tx_ctxt_desc_get_mss(struct sxgbe_tx_ctxt_desc *p)
{
return p->maxseg_size;
}
+/* Set TX tcmssv in TX context Descriptor */
+static void sxgbe_tx_ctxt_desc_set_tcmssv(struct sxgbe_tx_ctxt_desc *p)
+{
+ p->tcmssv = 1;
+}
+
+/* Reset TX ostc in TX context Descriptor */
+static void sxgbe_tx_ctxt_desc_reset_ostc(struct sxgbe_tx_ctxt_desc *p)
+{
+ p->ostc = 0;
+}
+
/* Set IVLAN information */
static void sxgbe_tx_ctxt_desc_set_ivlantag(struct sxgbe_tx_ctxt_desc *p,
int is_ivlanvalid, int
ivlan_tag,
@@ -177,13 +198,13 @@ static void sxgbe_tx_ctxt_desc_set_tstamp(struct
sxgbe_tx_ctxt_desc *p,
}
}
/* Close TX context descriptor */
-static void sxgbe_close_tx_ctxt_desc(struct sxgbe_tx_ctxt_desc *p)
+static void sxgbe_tx_ctxt_desc_close(struct sxgbe_tx_ctxt_desc *p)
{
p->own_bit = 1;
}
/* WB status of context descriptor */
-static int sxgbe_get_tx_ctxt_cde(struct sxgbe_tx_ctxt_desc *p)
+static int sxgbe_tx_ctxt_desc_get_cde(struct sxgbe_tx_ctxt_desc *p)
{
return p->ctxt_desc_err;
}
@@ -432,6 +453,7 @@ static u64 sxgbe_get_rx_timestamp(struct
sxgbe_rx_ctxt_desc *p)
static const struct sxgbe_desc_ops desc_ops = {
.init_tx_desc = sxgbe_init_tx_desc,
+ .tx_desc_enable_tse = sxgbe_tx_desc_enable_tse,
.prepare_tx_desc = sxgbe_prepare_tx_desc,
.tx_vlanctl_desc = sxgbe_tx_vlanctl_desc,
.set_tx_owner = sxgbe_set_tx_owner,
@@ -443,11 +465,20 @@ static const struct sxgbe_desc_ops desc_ops = {
.get_tx_len = sxgbe_get_tx_len,
.tx_enable_tstamp = sxgbe_tx_enable_tstamp,
.get_tx_timestamp_status = sxgbe_get_tx_timestamp_status,
+ .tx_ctxt_desc_set_ctxt = sxgbe_tx_ctxt_desc_set_ctxt,
+ .tx_ctxt_desc_set_owner = sxgbe_tx_ctxt_desc_set_owner,
+ .get_tx_ctxt_owner = sxgbe_tx_ctxt_desc_get_owner,
+ .tx_ctxt_desc_set_mss = sxgbe_tx_ctxt_desc_set_mss,
+ .tx_ctxt_desc_get_mss = sxgbe_tx_ctxt_desc_get_mss,
+ .tx_ctxt_desc_set_tcmssv = sxgbe_tx_ctxt_desc_set_tcmssv,
+ .tx_ctxt_desc_reset_ostc = sxgbe_tx_ctxt_desc_reset_ostc,
.tx_ctxt_desc_set_ivlantag = sxgbe_tx_ctxt_desc_set_ivlantag,
.tx_ctxt_desc_get_ivlantag = sxgbe_tx_ctxt_desc_get_ivlantag,
.tx_ctxt_desc_set_vlantag = sxgbe_tx_ctxt_desc_set_vlantag,
.tx_ctxt_desc_get_vlantag = sxgbe_tx_ctxt_desc_get_vlantag,
.tx_ctxt_set_tstamp = sxgbe_tx_ctxt_desc_set_tstamp,
+ .close_tx_ctxt_desc = sxgbe_tx_ctxt_desc_close,
+ .get_tx_ctxt_cde = sxgbe_tx_ctxt_desc_get_cde,
.init_rx_desc = sxgbe_init_rx_desc,
.get_rx_owner = sxgbe_get_rx_owner,
.set_rx_owner = sxgbe_set_rx_owner,
diff --git a/drivers/net/ethernet/samsung/sxgbe_desc.h
b/drivers/net/ethernet/samsung/sxgbe_desc.h
index 0d75f56..26ed30f 100644
--- a/drivers/net/ethernet/samsung/sxgbe_desc.h
+++ b/drivers/net/ethernet/samsung/sxgbe_desc.h
@@ -167,8 +167,9 @@ struct sxgbe_desc_ops {
void (*init_tx_desc)(struct sxgbe_tx_norm_desc *p);
/* Invoked by the xmit function to prepare the tx descriptor */
- void (*tx_enable_tse)(struct sxgbe_tx_norm_desc *p, u8 is_tse,
- u32 hdr_len, u32 payload_len);
+ void (*tx_desc_enable_tse)(struct sxgbe_tx_norm_desc *p, u8 is_tse,
+ u32 total_hdr_len, u32 tcp_hdr_len,
+ u32 tcp_payload_len);
/* Assign buffer lengths for descriptor */
void (*prepare_tx_desc)(struct sxgbe_tx_norm_desc *p, u8 is_fd,
@@ -207,20 +208,26 @@ struct sxgbe_desc_ops {
int (*get_tx_timestamp_status)(struct sxgbe_tx_norm_desc *p);
/* TX Context Descripto Specific */
- void (*init_tx_ctxt_desc)(struct sxgbe_tx_ctxt_desc *p);
+ void (*tx_ctxt_desc_set_ctxt)(struct sxgbe_tx_ctxt_desc *p);
/* Set the owner of the TX context descriptor */
- void (*set_tx_ctxt_owner)(struct sxgbe_tx_ctxt_desc *p);
+ void (*tx_ctxt_desc_set_owner)(struct sxgbe_tx_ctxt_desc *p);
/* Get the owner of the TX context descriptor */
int (*get_tx_ctxt_owner)(struct sxgbe_tx_ctxt_desc *p);
/* Set TX mss */
- void (*tx_ctxt_desc_setmss)(struct sxgbe_tx_ctxt_desc *p, int mss);
+ void (*tx_ctxt_desc_set_mss)(struct sxgbe_tx_ctxt_desc *p, u16 mss);
/* Set TX mss */
int (*tx_ctxt_desc_get_mss)(struct sxgbe_tx_ctxt_desc *p);
+ /* Set TX tcmssv */
+ void (*tx_ctxt_desc_set_tcmssv)(struct sxgbe_tx_ctxt_desc *p);
+
+ /* Reset TX ostc */
+ void (*tx_ctxt_desc_reset_ostc)(struct sxgbe_tx_ctxt_desc *p);
+
/* Set IVLAN information */
void (*tx_ctxt_desc_set_ivlantag)(struct sxgbe_tx_ctxt_desc *p,
int is_ivlanvalid, int ivlan_tag,
diff --git a/drivers/net/ethernet/samsung/sxgbe_dma.c
b/drivers/net/ethernet/samsung/sxgbe_dma.c
index f761867..e606ea7 100644
--- a/drivers/net/ethernet/samsung/sxgbe_dma.c
+++ b/drivers/net/ethernet/samsung/sxgbe_dma.c
@@ -353,6 +353,15 @@ static void sxgbe_dma_rx_watchdog(void __iomem *ioaddr,
u32 riwt)
}
}
+static void sxgbe_enable_tso(void __iomem *ioaddr, u8 chan_num)
+{
+ u32 ctrl;
+
+ ctrl = readl(ioaddr + SXGBE_DMA_CHA_TXCTL_REG(chan_num));
+ ctrl |= SXGBE_DMA_CHA_TXCTL_TSE_ENABLE;
+ writel(ctrl, ioaddr + SXGBE_DMA_CHA_TXCTL_REG(chan_num));
+}
+
static const struct sxgbe_dma_ops sxgbe_dma_ops = {
.init = sxgbe_dma_init,
.cha_init = sxgbe_dma_channel_init,
@@ -368,6 +377,7 @@ static const struct sxgbe_dma_ops sxgbe_dma_ops = {
.tx_dma_int_status = sxgbe_tx_dma_int_status,
.rx_dma_int_status = sxgbe_rx_dma_int_status,
.rx_watchdog = sxgbe_dma_rx_watchdog,
+ .enable_tso = sxgbe_enable_tso,
};
const struct sxgbe_dma_ops *sxgbe_get_dma_ops(void)
diff --git a/drivers/net/ethernet/samsung/sxgbe_dma.h
b/drivers/net/ethernet/samsung/sxgbe_dma.h
index 0d84f89..64ccd91 100644
--- a/drivers/net/ethernet/samsung/sxgbe_dma.h
+++ b/drivers/net/ethernet/samsung/sxgbe_dma.h
@@ -42,6 +42,8 @@ struct sxgbe_dma_ops {
struct sxgbe_extra_stats *x);
/* Program the HW RX Watchdog */
void (*rx_watchdog)(void __iomem *ioaddr, u32 riwt);
+ /* Enable TSO for each DMA channel */
+ void (*enable_tso)(void __iomem *ioaddr, u8 chan_num);
};
const struct sxgbe_dma_ops *sxgbe_get_dma_ops(void);
diff --git a/drivers/net/ethernet/samsung/sxgbe_main.c
b/drivers/net/ethernet/samsung/sxgbe_main.c
index b99afab..83b6e27 100644
--- a/drivers/net/ethernet/samsung/sxgbe_main.c
+++ b/drivers/net/ethernet/samsung/sxgbe_main.c
@@ -1168,6 +1168,28 @@ static int sxgbe_release(struct net_device *dev)
return 0;
}
+/* Prepare first Tx descriptor for doing TSO operation */
+void sxgbe_tso_prepare(struct sxgbe_priv_data *priv,
+ struct sxgbe_tx_norm_desc *first_desc,
+ struct sk_buff *skb)
+{
+ unsigned int total_hdr_len, tcp_hdr_len;
+
+ /* Write first Tx descriptor with appropriate value */
+ tcp_hdr_len = tcp_hdrlen(skb);
+ total_hdr_len = skb_transport_offset(skb) + tcp_hdr_len;
+
+ first_desc->tdes01 = dma_map_single(priv->device, skb->data,
+ total_hdr_len, DMA_TO_DEVICE);
+ if (dma_mapping_error(priv->device, first_desc->tdes01))
+ pr_err("%s: TX dma mapping failed!!\n", __func__);
+
+ first_desc->tdes23.tx_rd_des23.first_desc = 1;
+ priv->hw->desc->tx_desc_enable_tse(first_desc, 1, total_hdr_len,
+ tcp_hdr_len,
+ skb->len - total_hdr_len);
+}
+
/**
* sxgbe_xmit: Tx entry point of the driver
* @skb : the socket buffer
@@ -1185,13 +1207,22 @@ static netdev_tx_t sxgbe_xmit(struct sk_buff *skb,
struct net_device *dev)
unsigned int tx_rsize = priv->dma_tx_size;
struct sxgbe_tx_queue *tqueue = priv->txq[txq_index];
struct sxgbe_tx_norm_desc *tx_desc, *first_desc;
+ struct sxgbe_tx_ctxt_desc *ctxt_desc = NULL;
int nr_frags = skb_shinfo(skb)->nr_frags;
int no_pagedlen = skb_headlen(skb);
int is_jumbo = 0;
+ u16 mss;
+ u32 ctxt_desc_req = 0;
/* get the TX queue handle */
dev_txq = netdev_get_tx_queue(dev, txq_index);
+ if (likely(skb_is_gso(skb) ||
+ vlan_tx_tag_present(skb) ||
+ ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
+ tqueue->hwts_tx_en)))
+ ctxt_desc_req = 1;
+
/* get the spinlock */
spin_lock(&tqueue->tx_lock);
@@ -1210,18 +1241,36 @@ static netdev_tx_t sxgbe_xmit(struct sk_buff *skb,
struct net_device *dev)
tx_desc = tqueue->dma_tx + entry;
first_desc = tx_desc;
+ if (ctxt_desc_req)
+ ctxt_desc = (struct sxgbe_tx_ctxt_desc *)first_desc;
/* save the skb address */
tqueue->tx_skbuff[entry] = skb;
if (!is_jumbo) {
- tx_desc->tdes01 = dma_map_single(priv->device, skb->data,
- no_pagedlen,
DMA_TO_DEVICE);
- if (dma_mapping_error(priv->device, tx_desc->tdes01))
- pr_err("%s: TX dma mapping failed!!\n", __func__);
-
- priv->hw->desc->prepare_tx_desc(tx_desc, 1, no_pagedlen,
- no_pagedlen);
+ if (likely(skb_is_gso(skb))) {
+ /* TSO support */
+ mss = skb_shinfo(skb)->gso_size;
+ priv->hw->desc->tx_ctxt_desc_set_mss(ctxt_desc,
mss);
+ priv->hw->desc->tx_ctxt_desc_set_tcmssv(ctxt_desc);
+ priv->hw->desc->tx_ctxt_desc_reset_ostc(ctxt_desc);
+ priv->hw->desc->tx_ctxt_desc_set_ctxt(ctxt_desc);
+ priv->hw->desc->tx_ctxt_desc_set_owner(ctxt_desc);
+
+ entry = (++tqueue->cur_tx) % tx_rsize;
+ first_desc = tqueue->dma_tx + entry;
+
+ sxgbe_tso_prepare(priv, first_desc, skb);
+ } else {
+ tx_desc->tdes01 = dma_map_single(priv->device,
+ skb->data,
no_pagedlen, DMA_TO_DEVICE);
+ if (dma_mapping_error(priv->device,
tx_desc->tdes01))
+ netdev_err(dev, "%s: TX dma mapping
failed!!\n",
+ __func__);
+
+ priv->hw->desc->prepare_tx_desc(tx_desc, 1,
no_pagedlen,
+ no_pagedlen);
+ }
}
for (frag_num = 0; frag_num < nr_frags; frag_num++) {
@@ -1913,6 +1962,7 @@ struct sxgbe_priv_data *sxgbe_dvr_probe(struct device
*device,
int ret = 0;
struct net_device *ndev = NULL;
struct sxgbe_priv_data *priv;
+ u8 queue_num;
ndev = alloc_etherdev_mqs(sizeof(struct sxgbe_priv_data),
SXGBE_TX_QUEUES, SXGBE_RX_QUEUES);
@@ -1957,7 +2007,9 @@ struct sxgbe_priv_data *sxgbe_dvr_probe(struct device
*device,
ndev->netdev_ops = &sxgbe_netdev_ops;
- ndev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM;
+ ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM
|
+ NETIF_F_RXCSUM | NETIF_F_TSO | NETIF_F_TSO6 |
+ NETIF_F_GRO;
ndev->features |= ndev->hw_features | NETIF_F_HIGHDMA;
ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
@@ -1969,6 +2021,13 @@ struct sxgbe_priv_data *sxgbe_dvr_probe(struct device
*device,
if (flow_ctrl)
priv->flow_ctrl = SXGBE_FLOW_AUTO; /* RX/TX pause on */
+ /* Enable TCP segmentation offload for all DMA channels */
+ if (priv->hw_cap.tcpseg_offload) {
+ SXGBE_FOR_EACH_QUEUE(SXGBE_TX_QUEUES, queue_num) {
+ priv->hw->dma->enable_tso(priv->ioaddr, queue_num);
+ }
+ }
+
/* Rx Watchdog is available, enable depend on platform data */
if (!priv->plat->riwt_off) {
priv->use_riwt = 1;
--
1.7.10.4
--
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