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stmmac: support new GMAC4 

This patch adds the whole GMAC4 support inside the
stmmac d.d. now able to use the new HW and some new features
i.e.: TSO.
It is missing the multi-queue and split Header support at this
stage.
This patch also updates the driver version and the stmmac.txt.

Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexandre TORGUE 2016-04-01 11:37:34 +02:00 committed by David S. Miller
parent ee2ae1ed46
commit f748be531d
4 changed files with 444 additions and 54 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/ethernet/stmicro/stmmac/common.h
View File

@ -169,6 +169,9 @@ struct stmmac_extra_stats {
unsigned long mtl_rx_fifo_ctrl_active;
unsigned long mac_rx_frame_ctrl_fifo;
unsigned long mac_gmii_rx_proto_engine;
/* TSO */
unsigned long tx_tso_frames;
unsigned long tx_tso_nfrags;
};
/* CSR Frequency Access Defines*/
@ -545,6 +548,7 @@ void stmmac_dwmac4_set_mac(void __iomem *ioaddr, bool enable);
void dwmac_dma_flush_tx_fifo(void __iomem *ioaddr);
extern const struct stmmac_mode_ops ring_mode_ops;
extern const struct stmmac_mode_ops chain_mode_ops;
extern const struct stmmac_desc_ops dwmac4_desc_ops;
/**
* stmmac_get_synopsys_id - return the SYINID.

6
drivers/net/ethernet/stmicro/stmmac/stmmac.h
View File

@ -24,7 +24,7 @@
#define __STMMAC_H__
#define STMMAC_RESOURCE_NAME "stmmaceth"
#define DRV_MODULE_VERSION "Oct_2015"
#define DRV_MODULE_VERSION "Dec_2015"
#include <linux/clk.h>
#include <linux/stmmac.h>
@ -67,6 +67,7 @@ struct stmmac_priv {
spinlock_t tx_lock;
bool tx_path_in_lpi_mode;
struct timer_list txtimer;
bool tso;
struct dma_desc *dma_rx ____cacheline_aligned_in_smp;
struct dma_extended_desc *dma_erx;
@ -129,6 +130,9 @@ struct stmmac_priv {
int irq_wake;
spinlock_t ptp_lock;
void __iomem *mmcaddr;
u32 rx_tail_addr;
u32 tx_tail_addr;
u32 mss;
#ifdef CONFIG_DEBUG_FS
struct dentry *dbgfs_dir;

5
drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
View File

@ -161,6 +161,9 @@ static const struct stmmac_stats stmmac_gstrings_stats[] = {
STMMAC_STAT(mtl_rx_fifo_ctrl_active),
STMMAC_STAT(mac_rx_frame_ctrl_fifo),
STMMAC_STAT(mac_gmii_rx_proto_engine),
/* TSO */
STMMAC_STAT(tx_tso_frames),
STMMAC_STAT(tx_tso_nfrags),
};
#define STMMAC_STATS_LEN ARRAY_SIZE(stmmac_gstrings_stats)
@ -499,7 +502,7 @@ static void stmmac_get_ethtool_stats(struct net_device *dev,
int i, j = 0;
/* Update the DMA HW counters for dwmac10/100 */
if (!priv->plat->has_gmac)
if (priv->hw->dma->dma_diagnostic_fr)
priv->hw->dma->dma_diagnostic_fr(&dev->stats,
(void *) &priv->xstats,
priv->ioaddr);

483
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
View File

@ -56,6 +56,7 @@
#include "dwmac1000.h"
#define STMMAC_ALIGN(x) L1_CACHE_ALIGN(x)
#define TSO_MAX_BUFF_SIZE (SZ_16K - 1)
/* Module parameters */
#define TX_TIMEO 5000
@ -725,13 +726,15 @@ static void stmmac_adjust_link(struct net_device *dev)
new_state = 1;
switch (phydev->speed) {
case 1000:
if (likely(priv->plat->has_gmac))
if (likely((priv->plat->has_gmac) ||
(priv->plat->has_gmac4)))
ctrl &= ~priv->hw->link.port;
stmmac_hw_fix_mac_speed(priv);
break;
case 100:
case 10:
if (priv->plat->has_gmac) {
if (likely((priv->plat->has_gmac) ||
(priv->plat->has_gmac4))) {
ctrl |= priv->hw->link.port;
if (phydev->speed == SPEED_100) {
ctrl |= priv->hw->link.speed;
@ -971,7 +974,10 @@ static int stmmac_init_rx_buffers(struct stmmac_priv *priv, struct dma_desc *p,
return -EINVAL;
}
p->des2 = priv->rx_skbuff_dma[i];
if (priv->synopsys_id >= DWMAC_CORE_4_00)
p->des0 = priv->rx_skbuff_dma[i];
else
p->des2 = priv->rx_skbuff_dma[i];
if ((priv->hw->mode->init_desc3) &&
(priv->dma_buf_sz == BUF_SIZE_16KiB))
@ -1062,7 +1068,16 @@ static int init_dma_desc_rings(struct net_device *dev, gfp_t flags)
p = &((priv->dma_etx + i)->basic);
else
p = priv->dma_tx + i;
p->des2 = 0;
if (priv->synopsys_id >= DWMAC_CORE_4_00) {
p->des0 = 0;
p->des1 = 0;
p->des2 = 0;
p->des3 = 0;
} else {
p->des2 = 0;
}
priv->tx_skbuff_dma[i].buf = 0;
priv->tx_skbuff_dma[i].map_as_page = false;
priv->tx_skbuff_dma[i].len = 0;
@ -1325,9 +1340,13 @@ static void stmmac_tx_clean(struct stmmac_priv *priv)
priv->tx_skbuff_dma[entry].len,
DMA_TO_DEVICE);
priv->tx_skbuff_dma[entry].buf = 0;
priv->tx_skbuff_dma[entry].len = 0;
priv->tx_skbuff_dma[entry].map_as_page = false;
}
priv->hw->mode->clean_desc3(priv, p);
if (priv->hw->mode->clean_desc3)
priv->hw->mode->clean_desc3(priv, p);
priv->tx_skbuff_dma[entry].last_segment = false;
priv->tx_skbuff_dma[entry].is_jumbo = false;
@ -1452,7 +1471,10 @@ static void stmmac_mmc_setup(struct stmmac_priv *priv)
unsigned int mode = MMC_CNTRL_RESET_ON_READ | MMC_CNTRL_COUNTER_RESET |
MMC_CNTRL_PRESET | MMC_CNTRL_FULL_HALF_PRESET;
priv->mmcaddr = priv->ioaddr + MMC_GMAC3_X_OFFSET;
if (priv->synopsys_id >= DWMAC_CORE_4_00)
priv->mmcaddr = priv->ioaddr + MMC_GMAC4_OFFSET;
else
priv->mmcaddr = priv->ioaddr + MMC_GMAC3_X_OFFSET;
dwmac_mmc_intr_all_mask(priv->mmcaddr);
@ -1564,8 +1586,19 @@ static int stmmac_init_dma_engine(struct stmmac_priv *priv)
priv->hw->dma->init(priv->ioaddr, pbl, fixed_burst, mixed_burst,
aal, priv->dma_tx_phy, priv->dma_rx_phy, atds);
if ((priv->synopsys_id >= DWMAC_CORE_3_50) &&
(priv->plat->axi && priv->hw->dma->axi))
if (priv->synopsys_id >= DWMAC_CORE_4_00) {
priv->rx_tail_addr = priv->dma_rx_phy +
(DMA_RX_SIZE * sizeof(struct dma_desc));
priv->hw->dma->set_rx_tail_ptr(priv->ioaddr, priv->rx_tail_addr,
STMMAC_CHAN0);
priv->tx_tail_addr = priv->dma_tx_phy +
(DMA_TX_SIZE * sizeof(struct dma_desc));
priv->hw->dma->set_tx_tail_ptr(priv->ioaddr, priv->tx_tail_addr,
STMMAC_CHAN0);
}
if (priv->plat->axi && priv->hw->dma->axi)
priv->hw->dma->axi(priv->ioaddr, priv->plat->axi);
return ret;
@ -1645,7 +1678,10 @@ static int stmmac_hw_setup(struct net_device *dev, bool init_ptp)
}
/* Enable the MAC Rx/Tx */
stmmac_set_mac(priv->ioaddr, true);
if (priv->synopsys_id >= DWMAC_CORE_4_00)
stmmac_dwmac4_set_mac(priv->ioaddr, true);
else
stmmac_set_mac(priv->ioaddr, true);
/* Set the HW DMA mode and the COE */
stmmac_dma_operation_mode(priv);
@ -1683,6 +1719,18 @@ static int stmmac_hw_setup(struct net_device *dev, bool init_ptp)
if (priv->pcs && priv->hw->mac->ctrl_ane)
priv->hw->mac->ctrl_ane(priv->hw, 0);
/* set TX ring length */
if (priv->hw->dma->set_tx_ring_len)
priv->hw->dma->set_tx_ring_len(priv->ioaddr,
(DMA_TX_SIZE - 1));
/* set RX ring length */
if (priv->hw->dma->set_rx_ring_len)
priv->hw->dma->set_rx_ring_len(priv->ioaddr,
(DMA_RX_SIZE - 1));
/* Enable TSO */
if (priv->tso)
priv->hw->dma->enable_tso(priv->ioaddr, 1, STMMAC_CHAN0);
return 0;
}
@ -1847,6 +1895,239 @@ static int stmmac_release(struct net_device *dev)
return 0;
}
/**
* stmmac_tso_allocator - close entry point of the driver
* @priv: driver private structure
* @des: buffer start address
* @total_len: total length to fill in descriptors
* @last_segmant: condition for the last descriptor
* Description:
* This function fills descriptor and request new descriptors according to
* buffer length to fill
*/
static void stmmac_tso_allocator(struct stmmac_priv *priv, unsigned int des,
int total_len, bool last_segment)
{
struct dma_desc *desc;
int tmp_len;
u32 buff_size;
tmp_len = total_len;
while (tmp_len > 0) {
priv->cur_tx = STMMAC_GET_ENTRY(priv->cur_tx, DMA_TX_SIZE);
desc = priv->dma_tx + priv->cur_tx;
desc->des0 = des + (total_len - tmp_len);
buff_size = tmp_len >= TSO_MAX_BUFF_SIZE ?
TSO_MAX_BUFF_SIZE : tmp_len;
priv->hw->desc->prepare_tso_tx_desc(desc, 0, buff_size,
0, 1,
(last_segment) && (buff_size < TSO_MAX_BUFF_SIZE),
0, 0);
tmp_len -= TSO_MAX_BUFF_SIZE;
}
}
/**
* stmmac_tso_xmit - Tx entry point of the driver for oversized frames (TSO)
* @skb : the socket buffer
* @dev : device pointer
* Description: this is the transmit function that is called on TSO frames
* (support available on GMAC4 and newer chips).
* Diagram below show the ring programming in case of TSO frames:
*
* First Descriptor
* --------
* | DES0 |---> buffer1 = L2/L3/L4 header
* | DES1 |---> TCP Payload (can continue on next descr...)
* | DES2 |---> buffer 1 and 2 len
* | DES3 |---> must set TSE, TCP hdr len-> [22:19]. TCP payload len [17:0]
* --------
* |
* ...
* |
* --------
* | DES0 | --| Split TCP Payload on Buffers 1 and 2
* | DES1 | --|
* | DES2 | --> buffer 1 and 2 len
* | DES3 |
* --------
*
* mss is fixed when enable tso, so w/o programming the TDES3 ctx field.
*/
static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
{
u32 pay_len, mss;
int tmp_pay_len = 0;
struct stmmac_priv *priv = netdev_priv(dev);
int nfrags = skb_shinfo(skb)->nr_frags;
unsigned int first_entry, des;
struct dma_desc *desc, *first, *mss_desc = NULL;
u8 proto_hdr_len;
int i;
spin_lock(&priv->tx_lock);
/* Compute header lengths */
proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
/* Desc availability based on threshold should be enough safe */
if (unlikely(stmmac_tx_avail(priv) <
(((skb->len - proto_hdr_len) / TSO_MAX_BUFF_SIZE + 1)))) {
if (!netif_queue_stopped(dev)) {
netif_stop_queue(dev);
/* This is a hard error, log it. */
pr_err("%s: Tx Ring full when queue awake\n", __func__);
}
spin_unlock(&priv->tx_lock);
return NETDEV_TX_BUSY;
}
pay_len = skb_headlen(skb) - proto_hdr_len; /* no frags */
mss = skb_shinfo(skb)->gso_size;
/* set new MSS value if needed */
if (mss != priv->mss) {
mss_desc = priv->dma_tx + priv->cur_tx;
priv->hw->desc->set_mss(mss_desc, mss);
priv->mss = mss;
priv->cur_tx = STMMAC_GET_ENTRY(priv->cur_tx, DMA_TX_SIZE);
}
if (netif_msg_tx_queued(priv)) {
pr_info("%s: tcphdrlen %d, hdr_len %d, pay_len %d, mss %d\n",
__func__, tcp_hdrlen(skb), proto_hdr_len, pay_len, mss);
pr_info("\tskb->len %d, skb->data_len %d\n", skb->len,
skb->data_len);
}
first_entry = priv->cur_tx;
desc = priv->dma_tx + first_entry;
first = desc;
/* first descriptor: fill Headers on Buf1 */
des = dma_map_single(priv->device, skb->data, skb_headlen(skb),
DMA_TO_DEVICE);
if (dma_mapping_error(priv->device, des))
goto dma_map_err;
priv->tx_skbuff_dma[first_entry].buf = des;
priv->tx_skbuff_dma[first_entry].len = skb_headlen(skb);
priv->tx_skbuff[first_entry] = skb;
first->des0 = des;
/* Fill start of payload in buff2 of first descriptor */
if (pay_len)
first->des1 = des + proto_hdr_len;
/* If needed take extra descriptors to fill the remaining payload */
tmp_pay_len = pay_len - TSO_MAX_BUFF_SIZE;
stmmac_tso_allocator(priv, des, tmp_pay_len, (nfrags == 0));
/* Prepare fragments */
for (i = 0; i < nfrags; i++) {
const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
des = skb_frag_dma_map(priv->device, frag, 0,
skb_frag_size(frag),
DMA_TO_DEVICE);
stmmac_tso_allocator(priv, des, skb_frag_size(frag),
(i == nfrags - 1));
priv->tx_skbuff_dma[priv->cur_tx].buf = des;
priv->tx_skbuff_dma[priv->cur_tx].len = skb_frag_size(frag);
priv->tx_skbuff[priv->cur_tx] = NULL;
priv->tx_skbuff_dma[priv->cur_tx].map_as_page = true;
}
priv->tx_skbuff_dma[priv->cur_tx].last_segment = true;
priv->cur_tx = STMMAC_GET_ENTRY(priv->cur_tx, DMA_TX_SIZE);
if (unlikely(stmmac_tx_avail(priv) <= (MAX_SKB_FRAGS + 1))) {
if (netif_msg_hw(priv))
pr_debug("%s: stop transmitted packets\n", __func__);
netif_stop_queue(dev);
}
dev->stats.tx_bytes += skb->len;
priv->xstats.tx_tso_frames++;
priv->xstats.tx_tso_nfrags += nfrags;
/* Manage tx mitigation */
priv->tx_count_frames += nfrags + 1;
if (likely(priv->tx_coal_frames > priv->tx_count_frames)) {
mod_timer(&priv->txtimer,
STMMAC_COAL_TIMER(priv->tx_coal_timer));
} else {
priv->tx_count_frames = 0;
priv->hw->desc->set_tx_ic(desc);
priv->xstats.tx_set_ic_bit++;
}
if (!priv->hwts_tx_en)
skb_tx_timestamp(skb);
if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
priv->hwts_tx_en)) {
/* declare that device is doing timestamping */
skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
priv->hw->desc->enable_tx_timestamp(first);
}
/* Complete the first descriptor before granting the DMA */
priv->hw->desc->prepare_tso_tx_desc(first, 1,
proto_hdr_len,
pay_len,
1, priv->tx_skbuff_dma[first_entry].last_segment,
tcp_hdrlen(skb) / 4, (skb->len - proto_hdr_len));
/* If context desc is used to change MSS */
if (mss_desc)
priv->hw->desc->set_tx_owner(mss_desc);
/* The own bit must be the latest setting done when prepare the
* descriptor and then barrier is needed to make sure that
* all is coherent before granting the DMA engine.
*/
smp_wmb();
if (netif_msg_pktdata(priv)) {
pr_info("%s: curr=%d dirty=%d f=%d, e=%d, f_p=%p, nfrags %d\n",
__func__, priv->cur_tx, priv->dirty_tx, first_entry,
priv->cur_tx, first, nfrags);
priv->hw->desc->display_ring((void *)priv->dma_tx, DMA_TX_SIZE,
0);
pr_info(">>> frame to be transmitted: ");
print_pkt(skb->data, skb_headlen(skb));
}
netdev_sent_queue(dev, skb->len);
priv->hw->dma->set_tx_tail_ptr(priv->ioaddr, priv->tx_tail_addr,
STMMAC_CHAN0);
spin_unlock(&priv->tx_lock);
return NETDEV_TX_OK;
dma_map_err:
spin_unlock(&priv->tx_lock);
dev_err(priv->device, "Tx dma map failed\n");
dev_kfree_skb(skb);
priv->dev->stats.tx_dropped++;
return NETDEV_TX_OK;
}
/**
* stmmac_xmit - Tx entry point of the driver
* @skb : the socket buffer
@ -1864,6 +2145,13 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
unsigned int entry, first_entry;
struct dma_desc *desc, *first;
unsigned int enh_desc;
unsigned int des;
/* Manage oversized TCP frames for GMAC4 device */
if (skb_is_gso(skb) && priv->tso) {
if (ip_hdr(skb)->protocol == IPPROTO_TCP)
return stmmac_tso_xmit(skb, dev);
}
spin_lock(&priv->tx_lock);
@ -1899,7 +2187,8 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
if (enh_desc)
is_jumbo = priv->hw->mode->is_jumbo_frm(skb->len, enh_desc);
if (unlikely(is_jumbo)) {
if (unlikely(is_jumbo) && likely(priv->synopsys_id <
DWMAC_CORE_4_00)) {
entry = priv->hw->mode->jumbo_frm(priv, skb, csum_insertion);
if (unlikely(entry < 0))
goto dma_map_err;
@ -1917,13 +2206,21 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
else
desc = priv->dma_tx + entry;
desc->des2 = skb_frag_dma_map(priv->device, frag, 0, len,
DMA_TO_DEVICE);
if (dma_mapping_error(priv->device, desc->des2))
des = skb_frag_dma_map(priv->device, frag, 0, len,
DMA_TO_DEVICE);
if (dma_mapping_error(priv->device, des))
goto dma_map_err; /* should reuse desc w/o issues */
priv->tx_skbuff[entry] = NULL;
priv->tx_skbuff_dma[entry].buf = desc->des2;
if (unlikely(priv->synopsys_id >= DWMAC_CORE_4_00)) {
desc->des0 = des;
priv->tx_skbuff_dma[entry].buf = desc->des0;
} else {
desc->des2 = des;
priv->tx_skbuff_dma[entry].buf = desc->des2;
}
priv->tx_skbuff_dma[entry].map_as_page = true;
priv->tx_skbuff_dma[entry].len = len;
priv->tx_skbuff_dma[entry].last_segment = last_segment;
@ -1988,12 +2285,19 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
if (likely(!is_jumbo)) {
bool last_segment = (nfrags == 0);
first->des2 = dma_map_single(priv->device, skb->data,
nopaged_len, DMA_TO_DEVICE);
if (dma_mapping_error(priv->device, first->des2))
des = dma_map_single(priv->device, skb->data,
nopaged_len, DMA_TO_DEVICE);
if (dma_mapping_error(priv->device, des))
goto dma_map_err;
priv->tx_skbuff_dma[first_entry].buf = first->des2;
if (unlikely(priv->synopsys_id >= DWMAC_CORE_4_00)) {
first->des0 = des;
priv->tx_skbuff_dma[first_entry].buf = first->des0;
} else {
first->des2 = des;
priv->tx_skbuff_dma[first_entry].buf = first->des2;
}
priv->tx_skbuff_dma[first_entry].len = nopaged_len;
priv->tx_skbuff_dma[first_entry].last_segment = last_segment;
@ -2017,7 +2321,12 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
}
netdev_sent_queue(dev, skb->len);
priv->hw->dma->enable_dma_transmission(priv->ioaddr);
if (priv->synopsys_id < DWMAC_CORE_4_00)
priv->hw->dma->enable_dma_transmission(priv->ioaddr);
else
priv->hw->dma->set_tx_tail_ptr(priv->ioaddr, priv->tx_tail_addr,
STMMAC_CHAN0);
spin_unlock(&priv->tx_lock);
return NETDEV_TX_OK;
@ -2099,9 +2408,15 @@ static inline void stmmac_rx_refill(struct stmmac_priv *priv)
dev_kfree_skb(skb);
break;
}
p->des2 = priv->rx_skbuff_dma[entry];
priv->hw->mode->refill_desc3(priv, p);
if (unlikely(priv->synopsys_id >= DWMAC_CORE_4_00)) {
p->des0 = priv->rx_skbuff_dma[entry];
p->des1 = 0;
} else {
p->des2 = priv->rx_skbuff_dma[entry];
}
if (priv->hw->mode->refill_desc3)
priv->hw->mode->refill_desc3(priv, p);
if (priv->rx_zeroc_thresh > 0)
priv->rx_zeroc_thresh--;
@ -2109,9 +2424,13 @@ static inline void stmmac_rx_refill(struct stmmac_priv *priv)
if (netif_msg_rx_status(priv))
pr_debug("\trefill entry #%d\n", entry);
}
wmb();
priv->hw->desc->set_rx_owner(p);
if (unlikely(priv->synopsys_id >= DWMAC_CORE_4_00))
priv->hw->desc->init_rx_desc(p, priv->use_riwt, 0, 0);
else
priv->hw->desc->set_rx_owner(p);
wmb();
entry = STMMAC_GET_ENTRY(entry, DMA_RX_SIZE);
@ -2192,11 +2511,23 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit)
} else {
struct sk_buff *skb;
int frame_len;
unsigned int des;
if (unlikely(priv->synopsys_id >= DWMAC_CORE_4_00))
des = p->des0;
else
des = p->des2;
frame_len = priv->hw->desc->get_rx_frame_len(p, coe);
/* check if frame_len fits the preallocated memory */
/* If frame length is greather than skb buffer size
* (preallocated during init) then the packet is
* ignored
*/
if (frame_len > priv->dma_buf_sz) {
pr_err("%s: len %d larger than size (%d)\n",
priv->dev->name, frame_len,
priv->dma_buf_sz);
priv->dev->stats.rx_length_errors++;
break;
}
@ -2209,14 +2540,19 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit)
if (netif_msg_rx_status(priv)) {
pr_debug("\tdesc: %p [entry %d] buff=0x%x\n",
p, entry, p->des2);
p, entry, des);
if (frame_len > ETH_FRAME_LEN)
pr_debug("\tframe size %d, COE: %d\n",
frame_len, status);
}
if (unlikely((frame_len < priv->rx_copybreak) ||
stmmac_rx_threshold_count(priv))) {
/* The zero-copy is always used for all the sizes
* in case of GMAC4 because it needs
* to refill the used descriptors, always.
*/
if (unlikely(!priv->plat->has_gmac4 &&
((frame_len < priv->rx_copybreak) ||
stmmac_rx_threshold_count(priv)))) {
skb = netdev_alloc_skb_ip_align(priv->dev,
frame_len);
if (unlikely(!skb)) {
@ -2368,7 +2704,7 @@ static int stmmac_change_mtu(struct net_device *dev, int new_mtu)
return -EBUSY;
}
if (priv->plat->enh_desc)
if ((priv->plat->enh_desc) || (priv->synopsys_id >= DWMAC_CORE_4_00))
max_mtu = JUMBO_LEN;
else
max_mtu = SKB_MAX_HEAD(NET_SKB_PAD + NET_IP_ALIGN);
@ -2382,6 +2718,7 @@ static int stmmac_change_mtu(struct net_device *dev, int new_mtu)
}
dev->mtu = new_mtu;
netdev_update_features(dev);
return 0;
@ -2406,6 +2743,14 @@ static netdev_features_t stmmac_fix_features(struct net_device *dev,
if (priv->plat->bugged_jumbo && (dev->mtu > ETH_DATA_LEN))
features &= ~NETIF_F_CSUM_MASK;
/* Disable tso if asked by ethtool */
if ((priv->plat->tso_en) && (priv->dma_cap.tsoen)) {
if (features & NETIF_F_TSO)
priv->tso = true;
else
priv->tso = false;
}
return features;
}
@ -2452,7 +2797,7 @@ static irqreturn_t stmmac_interrupt(int irq, void *dev_id)
}
/* To handle GMAC own interrupts */
if (priv->plat->has_gmac) {
if ((priv->plat->has_gmac) || (priv->plat->has_gmac4)) {
int status = priv->hw->mac->host_irq_status(priv->hw,
&priv->xstats);
if (unlikely(status)) {
@ -2461,6 +2806,10 @@ static irqreturn_t stmmac_interrupt(int irq, void *dev_id)
priv->tx_path_in_lpi_mode = true;
if (status & CORE_IRQ_TX_PATH_EXIT_LPI_MODE)
priv->tx_path_in_lpi_mode = false;
if (status & CORE_IRQ_MTL_RX_OVERFLOW)
priv->hw->dma->set_rx_tail_ptr(priv->ioaddr,
priv->rx_tail_addr,
STMMAC_CHAN0);
}
}
@ -2533,15 +2882,14 @@ static void sysfs_display_ring(void *head, int size, int extend_desc,
x = *(u64 *) ep;
seq_printf(seq, "%d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n",
i, (unsigned int)virt_to_phys(ep),
(unsigned int)x, (unsigned int)(x >> 32),
ep->basic.des0, ep->basic.des1,
ep->basic.des2, ep->basic.des3);
ep++;
} else {
x = *(u64 *) p;
seq_printf(seq, "%d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n",
i, (unsigned int)virt_to_phys(ep),
(unsigned int)x, (unsigned int)(x >> 32),
p->des2, p->des3);
p->des0, p->des1, p->des2, p->des3);
p++;
}
seq_printf(seq, "\n");
@ -2624,10 +2972,15 @@ static int stmmac_sysfs_dma_cap_read(struct seq_file *seq, void *v)
seq_printf(seq, "\tAV features: %s\n", (priv->dma_cap.av) ? "Y" : "N");
seq_printf(seq, "\tChecksum Offload in TX: %s\n",
(priv->dma_cap.tx_coe) ? "Y" : "N");
seq_printf(seq, "\tIP Checksum Offload (type1) in RX: %s\n",
(priv->dma_cap.rx_coe_type1) ? "Y" : "N");
seq_printf(seq, "\tIP Checksum Offload (type2) in RX: %s\n",
(priv->dma_cap.rx_coe_type2) ? "Y" : "N");
if (priv->synopsys_id >= DWMAC_CORE_4_00) {
seq_printf(seq, "\tIP Checksum Offload in RX: %s\n",
(priv->dma_cap.rx_coe) ? "Y" : "N");
} else {
seq_printf(seq, "\tIP Checksum Offload (type1) in RX: %s\n",
(priv->dma_cap.rx_coe_type1) ? "Y" : "N");
seq_printf(seq, "\tIP Checksum Offload (type2) in RX: %s\n",
(priv->dma_cap.rx_coe_type2) ? "Y" : "N");
}
seq_printf(seq, "\tRXFIFO > 2048bytes: %s\n",
(priv->dma_cap.rxfifo_over_2048) ? "Y" : "N");
seq_printf(seq, "\tNumber of Additional RX channel: %d\n",
@ -2738,6 +3091,12 @@ static int stmmac_hw_init(struct stmmac_priv *priv)
priv->plat->multicast_filter_bins,
priv->plat->unicast_filter_entries,
&priv->synopsys_id);
} else if (priv->plat->has_gmac4) {
priv->dev->priv_flags |= IFF_UNICAST_FLT;
mac = dwmac4_setup(priv->ioaddr,
priv->plat->multicast_filter_bins,
priv->plat->unicast_filter_entries,
&priv->synopsys_id);
} else {
mac = dwmac100_setup(priv->ioaddr, &priv->synopsys_id);
}
@ -2747,14 +3106,18 @@ static int stmmac_hw_init(struct stmmac_priv *priv)
priv->hw = mac;
/* To use the chained or ring mode */
if (chain_mode) {
priv->hw->mode = &chain_mode_ops;
pr_info(" Chain mode enabled\n");
priv->mode = STMMAC_CHAIN_MODE;
if (priv->synopsys_id >= DWMAC_CORE_4_00) {
priv->hw->mode = &dwmac4_ring_mode_ops;
} else {
priv->hw->mode = &ring_mode_ops;
pr_info(" Ring mode enabled\n");
priv->mode = STMMAC_RING_MODE;
if (chain_mode) {
priv->hw->mode = &chain_mode_ops;
pr_info(" Chain mode enabled\n");
priv->mode = STMMAC_CHAIN_MODE;
} else {
priv->hw->mode = &ring_mode_ops;
pr_info(" Ring mode enabled\n");
priv->mode = STMMAC_RING_MODE;
}
}
/* Get the HW capability (new GMAC newer than 3.50a) */
@ -2770,11 +3133,9 @@ static int stmmac_hw_init(struct stmmac_priv *priv)
priv->plat->enh_desc = priv->dma_cap.enh_desc;
priv->plat->pmt = priv->dma_cap.pmt_remote_wake_up;
/* TXCOE doesn't work in thresh DMA mode */
if (priv->plat->force_thresh_dma_mode)
priv->plat->tx_coe = 0;
else
priv->plat->tx_coe = priv->dma_cap.tx_coe;
priv->plat->tx_coe = priv->dma_cap.tx_coe;
/* In case of GMAC4 rx_coe is from HW cap register. */
priv->plat->rx_coe = priv->dma_cap.rx_coe;
if (priv->dma_cap.rx_coe_type2)
priv->plat->rx_coe = STMMAC_RX_COE_TYPE2;
@ -2784,13 +3145,17 @@ static int stmmac_hw_init(struct stmmac_priv *priv)
} else
pr_info(" No HW DMA feature register supported");
/* To use alternate (extended) or normal descriptor structures */
stmmac_selec_desc_mode(priv);
/* To use alternate (extended), normal or GMAC4 descriptor structures */
if (priv->synopsys_id >= DWMAC_CORE_4_00)
priv->hw->desc = &dwmac4_desc_ops;
else
stmmac_selec_desc_mode(priv);
if (priv->plat->rx_coe) {
priv->hw->rx_csum = priv->plat->rx_coe;
pr_info(" RX Checksum Offload Engine supported (type %d)\n",
priv->plat->rx_coe);
pr_info(" RX Checksum Offload Engine supported\n");
if (priv->synopsys_id < DWMAC_CORE_4_00)
pr_info("\tCOE Type %d\n", priv->hw->rx_csum);
}
if (priv->plat->tx_coe)
pr_info(" TX Checksum insertion supported\n");
@ -2800,6 +3165,9 @@ static int stmmac_hw_init(struct stmmac_priv *priv)
device_set_wakeup_capable(priv->device, 1);
}
if (priv->dma_cap.tsoen)
pr_info(" TSO supported\n");
return 0;
}
@ -2903,6 +3271,12 @@ int stmmac_dvr_probe(struct device *device,
ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
NETIF_F_RXCSUM;
if ((priv->plat->tso_en) && (priv->dma_cap.tsoen)) {
ndev->hw_features |= NETIF_F_TSO;
priv->tso = true;
pr_info(" TSO feature enabled\n");
}
ndev->features |= ndev->hw_features | NETIF_F_HIGHDMA;
ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
#ifdef STMMAC_VLAN_TAG_USED
@ -3097,6 +3471,11 @@ int stmmac_resume(struct net_device *ndev)
priv->dirty_rx = 0;
priv->dirty_tx = 0;
priv->cur_tx = 0;
/* reset private mss value to force mss context settings at
* next tso xmit (only used for gmac4).
*/
priv->mss = 0;
stmmac_clear_descriptors(priv);
stmmac_hw_setup(ndev, false);