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stmmac: update normal descriptor structure (v2)

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This patch updates the normal descriptor structure
to work fine on new GMAC Synopsys chips.

Normal descriptors were designed on the old MAC10/100
databook 1.91 where some bits were reserved: for example
the tx checksum insertion and rx checksum offload.

The patch maintains the back-compatibility with old
MAC devices (tested on STx7109 MAC10/100) and adds new
fields that actually new GMAC devices can use.

For example, STx7109 (MAC10/100) will pass from the platform
  tx_coe = 0, enh_desc = 0, has_gmac = 0.
A platform like Loongson1B (GMAC) will pass:
  tx_coe = 1, enh_desc = 0, has_gmac = 1.

Thanks to Kelvin, he enhanced the normal descriptors for
GMAC (on MIPS Loongson1B platform).

Signed-off-by: Kelvin Cheung <keguang.zhang@gmail.com>
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Giuseppe CAVALLARO 2011-10-26 19:43:09 +00:00 committed by David S. Miller
parent e2c57f839c
commit 3c20f72f91
5 changed files with 51 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/ethernet/stmicro/stmmac/common.h
View File

@ -49,7 +49,7 @@ struct stmmac_extra_stats {
unsigned long tx_underflow ____cacheline_aligned;
unsigned long tx_carrier;
unsigned long tx_losscarrier;
unsigned long tx_heartbeat;
unsigned long vlan_tag;
unsigned long tx_deferred;
unsigned long tx_vlan;
unsigned long tx_jabber;
@ -58,9 +58,9 @@ struct stmmac_extra_stats {
unsigned long tx_ip_header_error;
/* Receive errors */
unsigned long rx_desc;
unsigned long rx_partial;
unsigned long rx_runt;
unsigned long rx_toolong;
unsigned long sa_filter_fail;
unsigned long overflow_error;
unsigned long ipc_csum_error;
unsigned long rx_collision;
unsigned long rx_crc;
unsigned long rx_length;

31
drivers/net/ethernet/stmicro/stmmac/descs.h
View File

@ -25,33 +25,34 @@ struct dma_desc {
union {
struct {
/* RDES0 */
u32 reserved1:1;
u32 payload_csum_error:1;
u32 crc_error:1;
u32 dribbling:1;
u32 mii_error:1;
u32 receive_watchdog:1;
u32 frame_type:1;
u32 collision:1;
u32 frame_too_long:1;
u32 ipc_csum_error:1;
u32 last_descriptor:1;
u32 first_descriptor:1;
u32 multicast_frame:1;
u32 run_frame:1;
u32 vlan_tag:1;
u32 overflow_error:1;
u32 length_error:1;
u32 partial_frame_error:1;
u32 sa_filter_fail:1;
u32 descriptor_error:1;
u32 error_summary:1;
u32 frame_length:14;
u32 filtering_fail:1;
u32 da_filter_fail:1;
u32 own:1;
/* RDES1 */
u32 buffer1_size:11;
u32 buffer2_size:11;
u32 reserved2:2;
u32 reserved1:2;
u32 second_address_chained:1;
u32 end_ring:1;
u32 reserved3:5;
u32 reserved2:5;
u32 disable_ic:1;
} rx;
struct {
/* RDES0 */
@ -91,24 +92,28 @@ struct dma_desc {
u32 underflow_error:1;
u32 excessive_deferral:1;
u32 collision_count:4;
u32 heartbeat_fail:1;
u32 vlan_frame:1;
u32 excessive_collisions:1;
u32 late_collision:1;
u32 no_carrier:1;
u32 loss_carrier:1;
u32 reserved1:3;
u32 payload_error:1;
u32 frame_flushed:1;
u32 jabber_timeout:1;
u32 error_summary:1;
u32 reserved2:15;
u32 ip_header_error:1;
u32 time_stamp_status:1;
u32 reserved1:13;
u32 own:1;
/* TDES1 */
u32 buffer1_size:11;
u32 buffer2_size:11;
u32 reserved3:1;
u32 time_stamp_enable:1;
u32 disable_padding:1;
u32 second_address_chained:1;
u32 end_ring:1;
u32 crc_disable:1;
u32 reserved4:2;
u32 checksum_insertion:2;
u32 first_segment:1;
u32 last_segment:1;
u32 interrupt:1;

38
drivers/net/ethernet/stmicro/stmmac/norm_desc.c
View File

@ -50,11 +50,12 @@ static int ndesc_get_tx_status(void *data, struct stmmac_extra_stats *x,
stats->collisions += p->des01.tx.collision_count;
ret = -1;
}
if (unlikely(p->des01.tx.heartbeat_fail)) {
x->tx_heartbeat++;
stats->tx_heartbeat_errors++;
ret = -1;
if (p->des01.etx.vlan_frame) {
CHIP_DBG(KERN_INFO "GMAC TX status: VLAN frame\n");
x->tx_vlan++;
}
if (unlikely(p->des01.tx.deferred))
x->tx_deferred++;
@ -68,12 +69,12 @@ static int ndesc_get_tx_len(struct dma_desc *p)
/* This function verifies if each incoming frame has some errors
* and, if required, updates the multicast statistics.
* In case of success, it returns csum_none because the device
* is not able to compute the csum in HW. */
* In case of success, it returns good_frame because the GMAC device
* is supposed to be able to compute the csum in HW. */
static int ndesc_get_rx_status(void *data, struct stmmac_extra_stats *x,
struct dma_desc *p)
{
int ret = csum_none;
int ret = good_frame;
struct net_device_stats *stats = (struct net_device_stats *)data;
if (unlikely(p->des01.rx.last_descriptor == 0)) {
@ -86,12 +87,12 @@ static int ndesc_get_rx_status(void *data, struct stmmac_extra_stats *x,
if (unlikely(p->des01.rx.error_summary)) {
if (unlikely(p->des01.rx.descriptor_error))
x->rx_desc++;
if (unlikely(p->des01.rx.partial_frame_error))
x->rx_partial++;
if (unlikely(p->des01.rx.run_frame))
x->rx_runt++;
if (unlikely(p->des01.rx.frame_too_long))
x->rx_toolong++;
if (unlikely(p->des01.rx.sa_filter_fail))
x->sa_filter_fail++;
if (unlikely(p->des01.rx.overflow_error))
x->overflow_error++;
if (unlikely(p->des01.rx.ipc_csum_error))
x->ipc_csum_error++;
if (unlikely(p->des01.rx.collision)) {
x->rx_collision++;
stats->collisions++;
@ -113,10 +114,10 @@ static int ndesc_get_rx_status(void *data, struct stmmac_extra_stats *x,
x->rx_mii++;
ret = discard_frame;
}
if (p->des01.rx.multicast_frame) {
x->rx_multicast++;
stats->multicast++;
}
#ifdef STMMAC_VLAN_TAG_USED
if (p->des01.rx.vlan_tag)
x->vlan_tag++;
#endif
return ret;
}
@ -184,6 +185,9 @@ static void ndesc_prepare_tx_desc(struct dma_desc *p, int is_fs, int len,
{
p->des01.tx.first_segment = is_fs;
norm_set_tx_desc_len(p, len);
if (likely(csum_flag))
p->des01.tx.checksum_insertion = cic_full;
}
static void ndesc_clear_tx_ic(struct dma_desc *p)

8
drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
View File

@ -50,7 +50,7 @@ static const struct stmmac_stats stmmac_gstrings_stats[] = {
STMMAC_STAT(tx_underflow),
STMMAC_STAT(tx_carrier),
STMMAC_STAT(tx_losscarrier),
STMMAC_STAT(tx_heartbeat),
STMMAC_STAT(vlan_tag),
STMMAC_STAT(tx_deferred),
STMMAC_STAT(tx_vlan),
STMMAC_STAT(rx_vlan),
@ -59,9 +59,9 @@ static const struct stmmac_stats stmmac_gstrings_stats[] = {
STMMAC_STAT(tx_payload_error),
STMMAC_STAT(tx_ip_header_error),
STMMAC_STAT(rx_desc),
STMMAC_STAT(rx_partial),
STMMAC_STAT(rx_runt),
STMMAC_STAT(rx_toolong),
STMMAC_STAT(sa_filter_fail),
STMMAC_STAT(overflow_error),
STMMAC_STAT(ipc_csum_error),
STMMAC_STAT(rx_collision),
STMMAC_STAT(rx_crc),
STMMAC_STAT(rx_length),

6
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
View File

@ -813,6 +813,7 @@ static u32 stmmac_get_synopsys_id(struct stmmac_priv *priv)
static int stmmac_get_hw_features(struct stmmac_priv *priv)
{
u32 hw_cap = 0;
if (priv->hw->dma->get_hw_feature) {
hw_cap = priv->hw->dma->get_hw_feature(priv->ioaddr);
@ -938,6 +939,7 @@ static int stmmac_open(struct net_device *dev)
stmmac_get_hw_features(priv);
priv->rx_coe = priv->hw->mac->rx_coe(priv->ioaddr);
if (priv->rx_coe)
pr_info("stmmac: Rx Checksum Offload Engine supported\n");
if (priv->plat->tx_coe)
@ -1275,8 +1277,8 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit)
#endif
skb->protocol = eth_type_trans(skb, priv->dev);
if (unlikely(status == csum_none)) {
/* always for the old mac 10/100 */
if (unlikely(!priv->rx_coe)) {
/* No RX COE for old mac10/100 devices */
skb_checksum_none_assert(skb);
netif_receive_skb(skb);
} else {