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path: root/drivers/net/atlx/atl1.c
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Diffstat (limited to 'drivers/net/atlx/atl1.c')
-rw-r--r--drivers/net/atlx/atl1.c265
1 files changed, 141 insertions, 124 deletions
diff --git a/drivers/net/atlx/atl1.c b/drivers/net/atlx/atl1.c
index 1f564f03d9d6..f4add3cafe24 100644
--- a/drivers/net/atlx/atl1.c
+++ b/drivers/net/atlx/atl1.c
@@ -1259,8 +1259,6 @@ static void atl1_intr_tx(struct atl1_adapter *adapter)
dev_kfree_skb_irq(buffer_info->skb);
buffer_info->skb = NULL;
}
- tpd->buffer_addr = 0;
- tpd->desc.data = 0;
if (++sw_tpd_next_to_clean == tpd_ring->count)
sw_tpd_next_to_clean = 0;
@@ -1282,48 +1280,69 @@ static u16 atl1_tpd_avail(struct atl1_tpd_ring *tpd_ring)
}
static int atl1_tso(struct atl1_adapter *adapter, struct sk_buff *skb,
- struct tso_param *tso)
+ struct tx_packet_desc *ptpd)
{
- /* We enter this function holding a spinlock. */
- u8 ipofst;
+ /* spinlock held */
+ u8 hdr_len, ip_off;
+ u32 real_len;
int err;
if (skb_shinfo(skb)->gso_size) {
if (skb_header_cloned(skb)) {
err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
if (unlikely(err))
- return err;
+ return -1;
}
if (skb->protocol == ntohs(ETH_P_IP)) {
struct iphdr *iph = ip_hdr(skb);
- iph->tot_len = 0;
+ real_len = (((unsigned char *)iph - skb->data) +
+ ntohs(iph->tot_len));
+ if (real_len < skb->len)
+ pskb_trim(skb, real_len);
+ hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
+ if (skb->len == hdr_len) {
+ iph->check = 0;
+ tcp_hdr(skb)->check =
+ ~csum_tcpudp_magic(iph->saddr,
+ iph->daddr, tcp_hdrlen(skb),
+ IPPROTO_TCP, 0);
+ ptpd->word3 |= (iph->ihl & TPD_IPHL_MASK) <<
+ TPD_IPHL_SHIFT;
+ ptpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
+ TPD_TCPHDRLEN_MASK) <<
+ TPD_TCPHDRLEN_SHIFT;
+ ptpd->word3 |= 1 << TPD_IP_CSUM_SHIFT;
+ ptpd->word3 |= 1 << TPD_TCP_CSUM_SHIFT;
+ return 1;
+ }
+
iph->check = 0;
tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
- iph->daddr, 0, IPPROTO_TCP, 0);
- ipofst = skb_network_offset(skb);
- if (ipofst != ETH_HLEN) /* 802.3 frame */
- tso->tsopl |= 1 << TSO_PARAM_ETHTYPE_SHIFT;
-
- tso->tsopl |= (iph->ihl &
- TSO_PARAM_IPHL_MASK) << TSO_PARAM_IPHL_SHIFT;
- tso->tsopl |= ((tcp_hdrlen(skb) >> 2) &
- TSO_PARAM_TCPHDRLEN_MASK) <<
- TSO_PARAM_TCPHDRLEN_SHIFT;
- tso->tsopl |= (skb_shinfo(skb)->gso_size &
- TSO_PARAM_MSS_MASK) << TSO_PARAM_MSS_SHIFT;
- tso->tsopl |= 1 << TSO_PARAM_IPCKSUM_SHIFT;
- tso->tsopl |= 1 << TSO_PARAM_TCPCKSUM_SHIFT;
- tso->tsopl |= 1 << TSO_PARAM_SEGMENT_SHIFT;
- return true;
+ iph->daddr, 0, IPPROTO_TCP, 0);
+ ip_off = (unsigned char *)iph -
+ (unsigned char *) skb_network_header(skb);
+ if (ip_off == 8) /* 802.3-SNAP frame */
+ ptpd->word3 |= 1 << TPD_ETHTYPE_SHIFT;
+ else if (ip_off != 0)
+ return -2;
+
+ ptpd->word3 |= (iph->ihl & TPD_IPHL_MASK) <<
+ TPD_IPHL_SHIFT;
+ ptpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
+ TPD_TCPHDRLEN_MASK) << TPD_TCPHDRLEN_SHIFT;
+ ptpd->word3 |= (skb_shinfo(skb)->gso_size &
+ TPD_MSS_MASK) << TPD_MSS_SHIFT;
+ ptpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
+ return 3;
}
}
return false;
}
static int atl1_tx_csum(struct atl1_adapter *adapter, struct sk_buff *skb,
- struct csum_param *csum)
+ struct tx_packet_desc *ptpd)
{
u8 css, cso;
@@ -1335,115 +1354,116 @@ static int atl1_tx_csum(struct atl1_adapter *adapter, struct sk_buff *skb,
"payload offset not an even number\n");
return -1;
}
- csum->csumpl |= (cso & CSUM_PARAM_PLOADOFFSET_MASK) <<
- CSUM_PARAM_PLOADOFFSET_SHIFT;
- csum->csumpl |= (css & CSUM_PARAM_XSUMOFFSET_MASK) <<
- CSUM_PARAM_XSUMOFFSET_SHIFT;
- csum->csumpl |= 1 << CSUM_PARAM_CUSTOMCKSUM_SHIFT;
+ ptpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
+ TPD_PLOADOFFSET_SHIFT;
+ ptpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
+ TPD_CCSUMOFFSET_SHIFT;
+ ptpd->word3 |= 1 << TPD_CUST_CSUM_EN_SHIFT;
return true;
}
-
- return true;
+ return 0;
}
static void atl1_tx_map(struct atl1_adapter *adapter, struct sk_buff *skb,
- bool tcp_seg)
+ struct tx_packet_desc *ptpd)
{
- /* We enter this function holding a spinlock. */
+ /* spinlock held */
struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
struct atl1_buffer *buffer_info;
+ u16 buf_len = skb->len;
struct page *page;
- int first_buf_len = skb->len;
unsigned long offset;
unsigned int nr_frags;
unsigned int f;
- u16 tpd_next_to_use;
- u16 proto_hdr_len;
- u16 len12;
+ int retval;
+ u16 next_to_use;
+ u16 data_len;
+ u8 hdr_len;
- first_buf_len -= skb->data_len;
+ buf_len -= skb->data_len;
nr_frags = skb_shinfo(skb)->nr_frags;
- tpd_next_to_use = atomic_read(&tpd_ring->next_to_use);
- buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
+ next_to_use = atomic_read(&tpd_ring->next_to_use);
+ buffer_info = &tpd_ring->buffer_info[next_to_use];
if (unlikely(buffer_info->skb))
BUG();
/* put skb in last TPD */
buffer_info->skb = NULL;
- if (tcp_seg) {
- /* TSO/GSO */
- proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
- buffer_info->length = proto_hdr_len;
+ retval = (ptpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
+ if (retval) {
+ /* TSO */
+ hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+ buffer_info->length = hdr_len;
page = virt_to_page(skb->data);
offset = (unsigned long)skb->data & ~PAGE_MASK;
buffer_info->dma = pci_map_page(adapter->pdev, page,
- offset, proto_hdr_len,
+ offset, hdr_len,
PCI_DMA_TODEVICE);
- if (++tpd_next_to_use == tpd_ring->count)
- tpd_next_to_use = 0;
+ if (++next_to_use == tpd_ring->count)
+ next_to_use = 0;
- if (first_buf_len > proto_hdr_len) {
- int i, m;
+ if (buf_len > hdr_len) {
+ int i, nseg;
- len12 = first_buf_len - proto_hdr_len;
- m = (len12 + ATL1_MAX_TX_BUF_LEN - 1) /
+ data_len = buf_len - hdr_len;
+ nseg = (data_len + ATL1_MAX_TX_BUF_LEN - 1) /
ATL1_MAX_TX_BUF_LEN;
- for (i = 0; i < m; i++) {
+ for (i = 0; i < nseg; i++) {
buffer_info =
- &tpd_ring->buffer_info[tpd_next_to_use];
+ &tpd_ring->buffer_info[next_to_use];
buffer_info->skb = NULL;
buffer_info->length =
(ATL1_MAX_TX_BUF_LEN >=
- len12) ? ATL1_MAX_TX_BUF_LEN : len12;
- len12 -= buffer_info->length;
+ data_len) ? ATL1_MAX_TX_BUF_LEN : data_len;
+ data_len -= buffer_info->length;
page = virt_to_page(skb->data +
- (proto_hdr_len +
- i * ATL1_MAX_TX_BUF_LEN));
+ (hdr_len + i * ATL1_MAX_TX_BUF_LEN));
offset = (unsigned long)(skb->data +
- (proto_hdr_len +
- i * ATL1_MAX_TX_BUF_LEN)) & ~PAGE_MASK;
+ (hdr_len + i * ATL1_MAX_TX_BUF_LEN)) &
+ ~PAGE_MASK;
buffer_info->dma = pci_map_page(adapter->pdev,
page, offset, buffer_info->length,
PCI_DMA_TODEVICE);
- if (++tpd_next_to_use == tpd_ring->count)
- tpd_next_to_use = 0;
+ if (++next_to_use == tpd_ring->count)
+ next_to_use = 0;
}
}
} else {
- /* not TSO/GSO */
- buffer_info->length = first_buf_len;
+ /* not TSO */
+ buffer_info->length = buf_len;
page = virt_to_page(skb->data);
offset = (unsigned long)skb->data & ~PAGE_MASK;
buffer_info->dma = pci_map_page(adapter->pdev, page,
- offset, first_buf_len, PCI_DMA_TODEVICE);
- if (++tpd_next_to_use == tpd_ring->count)
- tpd_next_to_use = 0;
+ offset, buf_len, PCI_DMA_TODEVICE);
+ if (++next_to_use == tpd_ring->count)
+ next_to_use = 0;
}
for (f = 0; f < nr_frags; f++) {
struct skb_frag_struct *frag;
- u16 lenf, i, m;
+ u16 i, nseg;
frag = &skb_shinfo(skb)->frags[f];
- lenf = frag->size;
+ buf_len = frag->size;
- m = (lenf + ATL1_MAX_TX_BUF_LEN - 1) / ATL1_MAX_TX_BUF_LEN;
- for (i = 0; i < m; i++) {
- buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
+ nseg = (buf_len + ATL1_MAX_TX_BUF_LEN - 1) /
+ ATL1_MAX_TX_BUF_LEN;
+ for (i = 0; i < nseg; i++) {
+ buffer_info = &tpd_ring->buffer_info[next_to_use];
if (unlikely(buffer_info->skb))
BUG();
buffer_info->skb = NULL;
- buffer_info->length = (lenf > ATL1_MAX_TX_BUF_LEN) ?
- ATL1_MAX_TX_BUF_LEN : lenf;
- lenf -= buffer_info->length;
+ buffer_info->length = (buf_len > ATL1_MAX_TX_BUF_LEN) ?
+ ATL1_MAX_TX_BUF_LEN : buf_len;
+ buf_len -= buffer_info->length;
buffer_info->dma = pci_map_page(adapter->pdev,
frag->page,
frag->page_offset + (i * ATL1_MAX_TX_BUF_LEN),
buffer_info->length, PCI_DMA_TODEVICE);
- if (++tpd_next_to_use == tpd_ring->count)
- tpd_next_to_use = 0;
+ if (++next_to_use == tpd_ring->count)
+ next_to_use = 0;
}
}
@@ -1451,39 +1471,44 @@ static void atl1_tx_map(struct atl1_adapter *adapter, struct sk_buff *skb,
buffer_info->skb = skb;
}
-static void atl1_tx_queue(struct atl1_adapter *adapter, int count,
- union tpd_descr *descr)
+static void atl1_tx_queue(struct atl1_adapter *adapter, u16 count,
+ struct tx_packet_desc *ptpd)
{
- /* We enter this function holding a spinlock. */
+ /* spinlock held */
struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
- int j;
- u32 val;
struct atl1_buffer *buffer_info;
struct tx_packet_desc *tpd;
- u16 tpd_next_to_use = atomic_read(&tpd_ring->next_to_use);
+ u16 j;
+ u32 val;
+ u16 next_to_use = (u16) atomic_read(&tpd_ring->next_to_use);
for (j = 0; j < count; j++) {
- buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
- tpd = ATL1_TPD_DESC(&adapter->tpd_ring, tpd_next_to_use);
- tpd->desc.csum.csumpu = descr->csum.csumpu;
- tpd->desc.csum.csumpl = descr->csum.csumpl;
- tpd->desc.tso.tsopu = descr->tso.tsopu;
- tpd->desc.tso.tsopl = descr->tso.tsopl;
+ buffer_info = &tpd_ring->buffer_info[next_to_use];
+ tpd = ATL1_TPD_DESC(&adapter->tpd_ring, next_to_use);
+ if (tpd != ptpd)
+ memcpy(tpd, ptpd, sizeof(struct tx_packet_desc));
tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
- tpd->desc.data = descr->data;
- tpd->desc.tso.tsopu |= (cpu_to_le16(buffer_info->length) &
- TSO_PARAM_BUFLEN_MASK) << TSO_PARAM_BUFLEN_SHIFT;
+ tpd->word2 = (cpu_to_le16(buffer_info->length) &
+ TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT;
- val = (descr->tso.tsopl >> TSO_PARAM_SEGMENT_SHIFT) &
- TSO_PARAM_SEGMENT_MASK;
- if (val && !j)
- tpd->desc.tso.tsopl |= 1 << TSO_PARAM_HDRFLAG_SHIFT;
+ /*
+ * if this is the first packet in a TSO chain, set
+ * TPD_HDRFLAG, otherwise, clear it.
+ */
+ val = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) &
+ TPD_SEGMENT_EN_MASK;
+ if (val) {
+ if (!j)
+ tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
+ else
+ tpd->word3 &= ~(1 << TPD_HDRFLAG_SHIFT);
+ }
if (j == (count - 1))
- tpd->desc.tso.tsopl |= 1 << TSO_PARAM_EOP_SHIFT;
+ tpd->word3 |= 1 << TPD_EOP_SHIFT;
- if (++tpd_next_to_use == tpd_ring->count)
- tpd_next_to_use = 0;
+ if (++next_to_use == tpd_ring->count)
+ next_to_use = 0;
}
/*
* Force memory writes to complete before letting h/w
@@ -1493,18 +1518,18 @@ static void atl1_tx_queue(struct atl1_adapter *adapter, int count,
*/
wmb();
- atomic_set(&tpd_ring->next_to_use, (int)tpd_next_to_use);
+ atomic_set(&tpd_ring->next_to_use, next_to_use);
}
static int atl1_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
{
struct atl1_adapter *adapter = netdev_priv(netdev);
+ struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
int len = skb->len;
int tso;
int count = 1;
int ret_val;
- u32 val;
- union tpd_descr param;
+ struct tx_packet_desc *ptpd;
u16 frag_size;
u16 vlan_tag;
unsigned long flags;
@@ -1515,18 +1540,11 @@ static int atl1_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
len -= skb->data_len;
- if (unlikely(skb->len == 0)) {
+ if (unlikely(skb->len <= 0)) {
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
- param.data = 0;
- param.tso.tsopu = 0;
- param.tso.tsopl = 0;
- param.csum.csumpu = 0;
- param.csum.csumpl = 0;
-
- /* nr_frags will be nonzero if we're doing scatter/gather (SG) */
nr_frags = skb_shinfo(skb)->nr_frags;
for (f = 0; f < nr_frags; f++) {
frag_size = skb_shinfo(skb)->frags[f].size;
@@ -1535,10 +1553,9 @@ static int atl1_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
ATL1_MAX_TX_BUF_LEN;
}
- /* mss will be nonzero if we're doing segment offload (TSO/GSO) */
mss = skb_shinfo(skb)->gso_size;
if (mss) {
- if (skb->protocol == htons(ETH_P_IP)) {
+ if (skb->protocol == ntohs(ETH_P_IP)) {
proto_hdr_len = (skb_transport_offset(skb) +
tcp_hdrlen(skb));
if (unlikely(proto_hdr_len > len)) {
@@ -1567,18 +1584,20 @@ static int atl1_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
return NETDEV_TX_BUSY;
}
- param.data = 0;
+ ptpd = ATL1_TPD_DESC(tpd_ring,
+ (u16) atomic_read(&tpd_ring->next_to_use));
+ memset(ptpd, 0, sizeof(struct tx_packet_desc));
if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
vlan_tag = vlan_tx_tag_get(skb);
vlan_tag = (vlan_tag << 4) | (vlan_tag >> 13) |
((vlan_tag >> 9) & 0x8);
- param.tso.tsopl |= 1 << TSO_PARAM_INSVLAG_SHIFT;
- param.tso.tsopu |= (vlan_tag & TSO_PARAM_VLANTAG_MASK) <<
- TSO_PARAM_VLAN_SHIFT;
+ ptpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
+ ptpd->word3 |= (vlan_tag & TPD_VL_TAGGED_MASK) <<
+ TPD_VL_TAGGED_SHIFT;
}
- tso = atl1_tso(adapter, skb, &param.tso);
+ tso = atl1_tso(adapter, skb, ptpd);
if (tso < 0) {
spin_unlock_irqrestore(&adapter->lock, flags);
dev_kfree_skb_any(skb);
@@ -1586,7 +1605,7 @@ static int atl1_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
}
if (!tso) {
- ret_val = atl1_tx_csum(adapter, skb, &param.csum);
+ ret_val = atl1_tx_csum(adapter, skb, ptpd);
if (ret_val < 0) {
spin_unlock_irqrestore(&adapter->lock, flags);
dev_kfree_skb_any(skb);
@@ -1594,13 +1613,11 @@ static int atl1_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
}
}
- val = (param.tso.tsopl >> TSO_PARAM_SEGMENT_SHIFT) &
- TSO_PARAM_SEGMENT_MASK;
- atl1_tx_map(adapter, skb, 1 == val);
- atl1_tx_queue(adapter, count, &param);
- netdev->trans_start = jiffies;
- spin_unlock_irqrestore(&adapter->lock, flags);
+ atl1_tx_map(adapter, skb, ptpd);
+ atl1_tx_queue(adapter, count, ptpd);
atl1_update_mailbox(adapter);
+ spin_unlock_irqrestore(&adapter->lock, flags);
+ netdev->trans_start = jiffies;
return NETDEV_TX_OK;
}
@@ -2759,7 +2776,7 @@ const struct ethtool_ops atl1_ethtool_ops = {
.get_ringparam = atl1_get_ringparam,
.set_ringparam = atl1_set_ringparam,
.get_pauseparam = atl1_get_pauseparam,
- .set_pauseparam = atl1_set_pauseparam,
+ .set_pauseparam = atl1_set_pauseparam,
.get_rx_csum = atl1_get_rx_csum,
.set_tx_csum = ethtool_op_set_tx_hw_csum,
.get_link = ethtool_op_get_link,
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 22:33:02 +0100