mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-30 18:14:04 +02:00
cns3xxx: fix ethernet jumbo-frame support, use single-page rx buffers and skb fragment lists
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33491 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd
parent
c206ff5a5d
commit
bae52cf056
@ -0,0 +1,317 @@
|
||||
--- a/drivers/net/ethernet/cavium/cns3xxx_eth.c
|
||||
+++ b/drivers/net/ethernet/cavium/cns3xxx_eth.c
|
||||
@@ -26,15 +26,18 @@
|
||||
|
||||
#define DRV_NAME "cns3xxx_eth"
|
||||
|
||||
-#define RX_DESCS 512
|
||||
-#define TX_DESCS 512
|
||||
-#define SKB_DMA_REALIGN ((PAGE_SIZE - NET_SKB_PAD) % SMP_CACHE_BYTES)
|
||||
+#define RX_DESCS 128
|
||||
+#define TX_DESCS 128
|
||||
|
||||
#define RX_POOL_ALLOC_SIZE (sizeof(struct rx_desc) * RX_DESCS)
|
||||
#define TX_POOL_ALLOC_SIZE (sizeof(struct tx_desc) * TX_DESCS)
|
||||
#define REGS_SIZE 336
|
||||
-#define MAX_MRU (1536 + SKB_DMA_REALIGN)
|
||||
-#define CNS3XXX_MAX_MTU (1536)
|
||||
+
|
||||
+#define SKB_HEAD_ALIGN (((PAGE_SIZE - NET_SKB_PAD) % SMP_CACHE_BYTES) + NET_SKB_PAD + NET_IP_ALIGN)
|
||||
+#define RX_SEGMENT_ALLOC_SIZE 4096
|
||||
+#define RX_SEGMENT_BUFSIZE (SKB_WITH_OVERHEAD(RX_SEGMENT_ALLOC_SIZE))
|
||||
+#define RX_SEGMENT_MRU ((RX_SEGMENT_BUFSIZE - SKB_HEAD_ALIGN))
|
||||
+#define MAX_MTU 9500
|
||||
|
||||
#define NAPI_WEIGHT 64
|
||||
|
||||
@@ -266,7 +269,7 @@ struct _rx_ring {
|
||||
struct rx_desc *desc;
|
||||
dma_addr_t phys_addr;
|
||||
struct rx_desc *cur_addr;
|
||||
- struct sk_buff *buff_tab[RX_DESCS];
|
||||
+ void *buff_tab[RX_DESCS];
|
||||
unsigned int phys_tab[RX_DESCS];
|
||||
u32 cur_index;
|
||||
u32 alloc_index;
|
||||
@@ -280,6 +283,8 @@ struct sw {
|
||||
struct cns3xxx_plat_info *plat;
|
||||
struct _tx_ring *tx_ring;
|
||||
struct _rx_ring *rx_ring;
|
||||
+ struct sk_buff *frag_first;
|
||||
+ struct sk_buff *frag_last;
|
||||
};
|
||||
|
||||
struct port {
|
||||
@@ -500,37 +505,35 @@ static void cns3xxx_alloc_rx_buf(struct
|
||||
struct _rx_ring *rx_ring = sw->rx_ring;
|
||||
unsigned int i = rx_ring->alloc_index;
|
||||
struct rx_desc *desc = &(rx_ring)->desc[i];
|
||||
- struct sk_buff *skb;
|
||||
+ void *buf;
|
||||
unsigned int phys;
|
||||
|
||||
for (received += rx_ring->alloc_count; received > 0; received--) {
|
||||
- if ((skb = dev_alloc_skb(MAX_MRU))) {
|
||||
- if (SKB_DMA_REALIGN)
|
||||
- skb_reserve(skb, SKB_DMA_REALIGN);
|
||||
- skb_reserve(skb, NET_IP_ALIGN);
|
||||
- phys = dma_map_single(NULL, skb->data,
|
||||
- CNS3XXX_MAX_MTU, DMA_FROM_DEVICE);
|
||||
- if (dma_mapping_error(NULL, phys)) {
|
||||
- dev_kfree_skb(skb);
|
||||
- /* Failed to map, better luck next time */
|
||||
- goto out;;
|
||||
- }
|
||||
- desc->sdp = phys;
|
||||
- } else {
|
||||
- /* Failed to allocate skb, try again next time */
|
||||
+ buf = kzalloc(RX_SEGMENT_ALLOC_SIZE, GFP_ATOMIC);
|
||||
+ if (!buf)
|
||||
+ goto out;
|
||||
+
|
||||
+ phys = dma_map_single(NULL, buf + SKB_HEAD_ALIGN,
|
||||
+ RX_SEGMENT_MRU, DMA_FROM_DEVICE);
|
||||
+ if (dma_mapping_error(NULL, phys)) {
|
||||
+ kfree(buf);
|
||||
goto out;
|
||||
}
|
||||
|
||||
+ desc->sdl = RX_SEGMENT_MRU;
|
||||
+ desc->sdp = phys;
|
||||
+
|
||||
/* put the new buffer on RX-free queue */
|
||||
- rx_ring->buff_tab[i] = skb;
|
||||
+ rx_ring->buff_tab[i] = buf;
|
||||
rx_ring->phys_tab[i] = phys;
|
||||
if (i == RX_DESCS - 1) {
|
||||
i = 0;
|
||||
desc->config0 = END_OF_RING | FIRST_SEGMENT |
|
||||
- LAST_SEGMENT | CNS3XXX_MAX_MTU;
|
||||
+ LAST_SEGMENT | RX_SEGMENT_MRU;
|
||||
desc = &(rx_ring)->desc[i];
|
||||
} else {
|
||||
- desc->config0 = FIRST_SEGMENT | LAST_SEGMENT | CNS3XXX_MAX_MTU;
|
||||
+ desc->config0 = FIRST_SEGMENT | LAST_SEGMENT |
|
||||
+ RX_SEGMENT_MRU;
|
||||
i++;
|
||||
desc++;
|
||||
}
|
||||
@@ -588,49 +591,78 @@ static int eth_poll(struct napi_struct *
|
||||
|
||||
while (desc->cown) {
|
||||
struct sk_buff *skb;
|
||||
+ int reserve = SKB_HEAD_ALIGN;
|
||||
|
||||
if (received >= budget)
|
||||
break;
|
||||
|
||||
- skb = rx_ring->buff_tab[i];
|
||||
+ /* process received frame */
|
||||
+ dma_unmap_single(&dev->dev, rx_ring->phys_tab[i],
|
||||
+ RX_SEGMENT_MRU, DMA_FROM_DEVICE);
|
||||
+
|
||||
+ skb = build_skb(rx_ring->buff_tab[i]);
|
||||
+ if (!skb)
|
||||
+ break;
|
||||
|
||||
dev = switch_port_tab[desc->sp]->netdev;
|
||||
|
||||
length = desc->sdl;
|
||||
- /* process received frame */
|
||||
- dma_unmap_single(&dev->dev, rx_ring->phys_tab[i],
|
||||
- length, DMA_FROM_DEVICE);
|
||||
+ if (desc->fsd && !desc->lsd)
|
||||
+ length = RX_SEGMENT_MRU;
|
||||
|
||||
+ if (!desc->fsd) {
|
||||
+ reserve -= NET_IP_ALIGN;
|
||||
+ if (!desc->lsd)
|
||||
+ length += NET_IP_ALIGN;
|
||||
+ }
|
||||
+
|
||||
+ skb_reserve(skb, reserve);
|
||||
skb_put(skb, length);
|
||||
|
||||
- skb->dev = dev;
|
||||
- skb->protocol = eth_type_trans(skb, dev);
|
||||
+ if (!sw->frag_first)
|
||||
+ sw->frag_first = skb;
|
||||
+ else {
|
||||
+ if (sw->frag_first == sw->frag_last)
|
||||
+ skb_frag_add_head(sw->frag_first, skb);
|
||||
+ sw->frag_last->next = skb;
|
||||
+ sw->frag_first->len += skb->len;
|
||||
+ sw->frag_first->data_len += skb->len;
|
||||
+ sw->frag_first->truesize += skb->truesize;
|
||||
+ }
|
||||
+ sw->frag_last = skb;
|
||||
|
||||
- dev->stats.rx_packets++;
|
||||
- dev->stats.rx_bytes += length;
|
||||
+ if (desc->lsd) {
|
||||
+ skb = sw->frag_first;
|
||||
+ skb->protocol = eth_type_trans(skb, dev);
|
||||
+
|
||||
+ dev->stats.rx_packets++;
|
||||
+ dev->stats.rx_bytes += skb->len;
|
||||
+
|
||||
+ /* RX Hardware checksum offload */
|
||||
+ skb->ip_summed = CHECKSUM_NONE;
|
||||
+ switch (desc->prot) {
|
||||
+ case 1:
|
||||
+ case 2:
|
||||
+ case 5:
|
||||
+ case 6:
|
||||
+ case 13:
|
||||
+ case 14:
|
||||
+ if (desc->l4f)
|
||||
+ break;
|
||||
|
||||
- /* RX Hardware checksum offload */
|
||||
- switch (desc->prot) {
|
||||
- case 1:
|
||||
- case 2:
|
||||
- case 5:
|
||||
- case 6:
|
||||
- case 13:
|
||||
- case 14:
|
||||
- if (desc->l4f)
|
||||
- skb->ip_summed = CHECKSUM_NONE;
|
||||
- else
|
||||
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
||||
- break;
|
||||
- default:
|
||||
- skb->ip_summed = CHECKSUM_NONE;
|
||||
- break;
|
||||
- }
|
||||
+ break;
|
||||
+ default:
|
||||
+ break;
|
||||
+ }
|
||||
|
||||
- napi_gro_receive(napi, skb);
|
||||
+ napi_gro_receive(napi, skb);
|
||||
|
||||
- received++;
|
||||
+ sw->frag_first = NULL;
|
||||
+ sw->frag_last = NULL;
|
||||
+ }
|
||||
|
||||
+ received++;
|
||||
if (++i == RX_DESCS) {
|
||||
i = 0;
|
||||
desc = &(rx_ring)->desc[i];
|
||||
@@ -671,12 +703,6 @@ static int eth_xmit(struct sk_buff *skb,
|
||||
if (pmap == 8)
|
||||
pmap = (1 << 4);
|
||||
|
||||
- if (skb->len > CNS3XXX_MAX_MTU) {
|
||||
- dev_kfree_skb(skb);
|
||||
- dev->stats.tx_errors++;
|
||||
- return NETDEV_TX_OK;
|
||||
- }
|
||||
-
|
||||
spin_lock(&tx_lock);
|
||||
|
||||
if ((tx_ring->num_used + nr_frags) >= TX_DESCS) {
|
||||
@@ -701,8 +727,7 @@ static int eth_xmit(struct sk_buff *skb,
|
||||
|
||||
len = skb->len;
|
||||
|
||||
- phys = dma_map_single(NULL, skb->data, len,
|
||||
- DMA_TO_DEVICE);
|
||||
+ phys = dma_map_single(NULL, skb->data, len, DMA_TO_DEVICE);
|
||||
|
||||
tx_desc->sdp = phys;
|
||||
tx_desc->pmap = pmap;
|
||||
@@ -849,24 +874,24 @@ static int init_rings(struct sw *sw)
|
||||
/* Setup RX buffers */
|
||||
for (i = 0; i < RX_DESCS; i++) {
|
||||
struct rx_desc *desc = &(rx_ring)->desc[i];
|
||||
- struct sk_buff *skb;
|
||||
- if (!(skb = dev_alloc_skb(MAX_MRU)))
|
||||
+ void *buf;
|
||||
+
|
||||
+ buf = kzalloc(RX_SEGMENT_ALLOC_SIZE, GFP_KERNEL);
|
||||
+ if (!buf)
|
||||
return -ENOMEM;
|
||||
- if (SKB_DMA_REALIGN)
|
||||
- skb_reserve(skb, SKB_DMA_REALIGN);
|
||||
- skb_reserve(skb, NET_IP_ALIGN);
|
||||
- desc->sdl = CNS3XXX_MAX_MTU;
|
||||
+
|
||||
+ desc->sdl = RX_SEGMENT_MRU;
|
||||
if (i == (RX_DESCS - 1))
|
||||
desc->eor = 1;
|
||||
desc->fsd = 1;
|
||||
desc->lsd = 1;
|
||||
|
||||
- desc->sdp = dma_map_single(NULL, skb->data,
|
||||
- CNS3XXX_MAX_MTU, DMA_FROM_DEVICE);
|
||||
- if (dma_mapping_error(NULL, desc->sdp)) {
|
||||
+ desc->sdp = dma_map_single(NULL, buf + SKB_HEAD_ALIGN,
|
||||
+ RX_SEGMENT_MRU, DMA_FROM_DEVICE);
|
||||
+ if (dma_mapping_error(NULL, desc->sdp))
|
||||
return -EIO;
|
||||
- }
|
||||
- rx_ring->buff_tab[i] = skb;
|
||||
+
|
||||
+ rx_ring->buff_tab[i] = buf;
|
||||
rx_ring->phys_tab[i] = desc->sdp;
|
||||
desc->cown = 0;
|
||||
}
|
||||
@@ -905,12 +930,13 @@ static void destroy_rings(struct sw *sw)
|
||||
struct _rx_ring *rx_ring = sw->rx_ring;
|
||||
struct rx_desc *desc = &(rx_ring)->desc[i];
|
||||
struct sk_buff *skb = sw->rx_ring->buff_tab[i];
|
||||
- if (skb) {
|
||||
- dma_unmap_single(NULL,
|
||||
- desc->sdp,
|
||||
- CNS3XXX_MAX_MTU, DMA_FROM_DEVICE);
|
||||
- dev_kfree_skb(skb);
|
||||
- }
|
||||
+
|
||||
+ if (!skb)
|
||||
+ continue;
|
||||
+
|
||||
+ dma_unmap_single(NULL, desc->sdp, RX_SEGMENT_MRU,
|
||||
+ DMA_FROM_DEVICE);
|
||||
+ dev_kfree_skb(skb);
|
||||
}
|
||||
dma_pool_free(rx_dma_pool, sw->rx_ring->desc, sw->rx_ring->phys_addr);
|
||||
dma_pool_destroy(rx_dma_pool);
|
||||
@@ -1085,13 +1111,22 @@ static int eth_set_mac(struct net_device
|
||||
return 0;
|
||||
}
|
||||
|
||||
+static int cns3xxx_change_mtu(struct net_device *dev, int new_mtu)
|
||||
+{
|
||||
+ if (new_mtu > MAX_MTU)
|
||||
+ return -EINVAL;
|
||||
+
|
||||
+ dev->mtu = new_mtu;
|
||||
+ return 0;
|
||||
+}
|
||||
+
|
||||
static const struct net_device_ops cns3xxx_netdev_ops = {
|
||||
.ndo_open = eth_open,
|
||||
.ndo_stop = eth_close,
|
||||
.ndo_start_xmit = eth_xmit,
|
||||
.ndo_set_rx_mode = eth_rx_mode,
|
||||
.ndo_do_ioctl = eth_ioctl,
|
||||
- .ndo_change_mtu = eth_change_mtu,
|
||||
+ .ndo_change_mtu = cns3xxx_change_mtu,
|
||||
.ndo_set_mac_address = eth_set_mac,
|
||||
.ndo_validate_addr = eth_validate_addr,
|
||||
};
|
||||
@@ -1124,6 +1159,10 @@ static int __devinit eth_init_one(struct
|
||||
goto err_free;
|
||||
}
|
||||
|
||||
+ temp = __raw_readl(&sw->regs->phy_auto_addr);
|
||||
+ temp |= (3 << 30); /* maximum frame length: 9600 bytes */
|
||||
+ __raw_writel(temp, &sw->regs->phy_auto_addr);
|
||||
+
|
||||
for (i = 0; i < 4; i++) {
|
||||
temp = __raw_readl(&sw->regs->mac_cfg[i]);
|
||||
temp |= (PORT_DISABLE);
|
||||
Loading…
Reference in New Issue
Block a user