fp->last_max_sge, fp->rx_sge_prod);
}
+/* Set Toeplitz hash value in the skb using the value from the
+ * CQE (calculated by HW).
+ */
+static u32 bnx2x_get_rxhash(const struct bnx2x *bp,
+ const struct eth_fast_path_rx_cqe *cqe)
+{
+ /* Set Toeplitz hash from CQE */
+ if ((bp->dev->features & NETIF_F_RXHASH) &&
+ (cqe->status_flags & ETH_FAST_PATH_RX_CQE_RSS_HASH_FLG))
+ return le32_to_cpu(cqe->rss_hash_result);
+ return 0;
+}
+
static void bnx2x_tpa_start(struct bnx2x_fastpath *fp, u16 queue,
- struct sk_buff *skb, u16 cons, u16 prod,
+ u16 cons, u16 prod,
struct eth_fast_path_rx_cqe *cqe)
{
struct bnx2x *bp = fp->bp;
if (tpa_info->tpa_state != BNX2X_TPA_STOP)
BNX2X_ERR("start of bin not in stop [%d]\n", queue);
- /* Try to map an empty skb from the aggregation info */
+ /* Try to map an empty data buffer from the aggregation info */
mapping = dma_map_single(&bp->pdev->dev,
- first_buf->skb->data,
+ first_buf->data + NET_SKB_PAD,
fp->rx_buf_size, DMA_FROM_DEVICE);
/*
* ...if it fails - move the skb from the consumer to the producer
if (unlikely(dma_mapping_error(&bp->pdev->dev, mapping))) {
/* Move the BD from the consumer to the producer */
- bnx2x_reuse_rx_skb(fp, cons, prod);
+ bnx2x_reuse_rx_data(fp, cons, prod);
tpa_info->tpa_state = BNX2X_TPA_ERROR;
return;
}
- /* move empty skb from pool to prod */
- prod_rx_buf->skb = first_buf->skb;
+ /* move empty data from pool to prod */
+ prod_rx_buf->data = first_buf->data;
dma_unmap_addr_set(prod_rx_buf, mapping, mapping);
- /* point prod_bd to new skb */
+ /* point prod_bd to new data */
prod_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
prod_bd->addr_lo = cpu_to_le32(U64_LO(mapping));
tpa_info->tpa_state = BNX2X_TPA_START;
tpa_info->len_on_bd = le16_to_cpu(cqe->len_on_bd);
tpa_info->placement_offset = cqe->placement_offset;
+ tpa_info->rxhash = bnx2x_get_rxhash(bp, cqe);
#ifdef BNX2X_STOP_ON_ERROR
fp->tpa_queue_used |= (1 << queue);
{
struct bnx2x_agg_info *tpa_info = &fp->tpa_info[queue];
struct sw_rx_bd *rx_buf = &tpa_info->first_buf;
- u8 pad = tpa_info->placement_offset;
+ u32 pad = tpa_info->placement_offset;
u16 len = tpa_info->len_on_bd;
- struct sk_buff *skb = rx_buf->skb;
+ struct sk_buff *skb = NULL;
+ u8 *data = rx_buf->data;
/* alloc new skb */
- struct sk_buff *new_skb;
+ u8 *new_data;
u8 old_tpa_state = tpa_info->tpa_state;
tpa_info->tpa_state = BNX2X_TPA_STOP;
if (old_tpa_state == BNX2X_TPA_ERROR)
goto drop;
- /* Try to allocate the new skb */
- new_skb = netdev_alloc_skb(bp->dev, fp->rx_buf_size);
+ /* Try to allocate the new data */
+ new_data = kmalloc(fp->rx_buf_size + NET_SKB_PAD, GFP_ATOMIC);
/* Unmap skb in the pool anyway, as we are going to change
pool entry status to BNX2X_TPA_STOP even if new skb allocation
fails. */
dma_unmap_single(&bp->pdev->dev, dma_unmap_addr(rx_buf, mapping),
fp->rx_buf_size, DMA_FROM_DEVICE);
+ if (likely(new_data))
+ skb = build_skb(data);
- if (likely(new_skb)) {
- prefetch(skb);
- prefetch(((char *)(skb)) + L1_CACHE_BYTES);
+ if (likely(skb)) {
#ifdef BNX2X_STOP_ON_ERROR
if (pad + len > fp->rx_buf_size) {
}
#endif
- skb_reserve(skb, pad);
+ skb_reserve(skb, pad + NET_SKB_PAD);
skb_put(skb, len);
+ skb->rxhash = tpa_info->rxhash;
skb->protocol = eth_type_trans(skb, bp->dev);
skb->ip_summed = CHECKSUM_UNNECESSARY;
}
- /* put new skb in bin */
- rx_buf->skb = new_skb;
+ /* put new data in bin */
+ rx_buf->data = new_data;
return;
}
fp->eth_q_stats.rx_skb_alloc_failed++;
}
-/* Set Toeplitz hash value in the skb using the value from the
- * CQE (calculated by HW).
- */
-static inline void bnx2x_set_skb_rxhash(struct bnx2x *bp, union eth_rx_cqe *cqe,
- struct sk_buff *skb)
-{
- /* Set Toeplitz hash from CQE */
- if ((bp->dev->features & NETIF_F_RXHASH) &&
- (cqe->fast_path_cqe.status_flags &
- ETH_FAST_PATH_RX_CQE_RSS_HASH_FLG))
- skb->rxhash =
- le32_to_cpu(cqe->fast_path_cqe.rss_hash_result);
-}
int bnx2x_rx_int(struct bnx2x_fastpath *fp, int budget)
{
u8 cqe_fp_flags;
enum eth_rx_cqe_type cqe_fp_type;
u16 len, pad;
+ u8 *data;
#ifdef BNX2X_STOP_ON_ERROR
if (unlikely(bp->panic))
bd_prod = RX_BD(bd_prod);
bd_cons = RX_BD(bd_cons);
- /* Prefetch the page containing the BD descriptor
- at producer's index. It will be needed when new skb is
- allocated */
- prefetch((void *)(PAGE_ALIGN((unsigned long)
- (&fp->rx_desc_ring[bd_prod])) -
- PAGE_SIZE + 1));
-
cqe = &fp->rx_comp_ring[comp_ring_cons];
cqe_fp = &cqe->fast_path_cqe;
cqe_fp_flags = cqe_fp->type_error_flags;
if (unlikely(CQE_TYPE_SLOW(cqe_fp_type))) {
bnx2x_sp_event(fp, cqe);
goto next_cqe;
+ }
+ rx_buf = &fp->rx_buf_ring[bd_cons];
+ data = rx_buf->data;
- /* this is an rx packet */
- } else {
- rx_buf = &fp->rx_buf_ring[bd_cons];
- skb = rx_buf->skb;
- prefetch(skb);
-
- if (!CQE_TYPE_FAST(cqe_fp_type)) {
+ if (!CQE_TYPE_FAST(cqe_fp_type)) {
#ifdef BNX2X_STOP_ON_ERROR
- /* sanity check */
- if (fp->disable_tpa &&
- (CQE_TYPE_START(cqe_fp_type) ||
- CQE_TYPE_STOP(cqe_fp_type)))
- BNX2X_ERR("START/STOP packet while "
- "disable_tpa type %x\n",
- CQE_TYPE(cqe_fp_type));
+ /* sanity check */
+ if (fp->disable_tpa &&
+ (CQE_TYPE_START(cqe_fp_type) ||
+ CQE_TYPE_STOP(cqe_fp_type)))
+ BNX2X_ERR("START/STOP packet while "
+ "disable_tpa type %x\n",
+ CQE_TYPE(cqe_fp_type));
#endif
- if (CQE_TYPE_START(cqe_fp_type)) {
- u16 queue = cqe_fp->queue_index;
- DP(NETIF_MSG_RX_STATUS,
- "calling tpa_start on queue %d\n",
- queue);
-
- bnx2x_tpa_start(fp, queue, skb,
- bd_cons, bd_prod,
- cqe_fp);
-
- /* Set Toeplitz hash for LRO skb */
- bnx2x_set_skb_rxhash(bp, cqe, skb);
-
- goto next_rx;
-
- } else {
- u16 queue =
- cqe->end_agg_cqe.queue_index;
- DP(NETIF_MSG_RX_STATUS,
- "calling tpa_stop on queue %d\n",
- queue);
+ if (CQE_TYPE_START(cqe_fp_type)) {
+ u16 queue = cqe_fp->queue_index;
+ DP(NETIF_MSG_RX_STATUS,
+ "calling tpa_start on queue %d\n",
+ queue);
- bnx2x_tpa_stop(bp, fp, queue,
- &cqe->end_agg_cqe,
- comp_ring_cons);
+ bnx2x_tpa_start(fp, queue,
+ bd_cons, bd_prod,
+ cqe_fp);
+ goto next_rx;
+ } else {
+ u16 queue =
+ cqe->end_agg_cqe.queue_index;
+ DP(NETIF_MSG_RX_STATUS,
+ "calling tpa_stop on queue %d\n",
+ queue);
+
+ bnx2x_tpa_stop(bp, fp, queue,
+ &cqe->end_agg_cqe,
+ comp_ring_cons);
#ifdef BNX2X_STOP_ON_ERROR
- if (bp->panic)
- return 0;
+ if (bp->panic)
+ return 0;
#endif
- bnx2x_update_sge_prod(fp, cqe_fp);
- goto next_cqe;
- }
+ bnx2x_update_sge_prod(fp, cqe_fp);
+ goto next_cqe;
}
- /* non TPA */
- len = le16_to_cpu(cqe_fp->pkt_len);
- pad = cqe_fp->placement_offset;
- dma_sync_single_for_cpu(&bp->pdev->dev,
+ }
+ /* non TPA */
+ len = le16_to_cpu(cqe_fp->pkt_len);
+ pad = cqe_fp->placement_offset;
+ dma_sync_single_for_cpu(&bp->pdev->dev,
dma_unmap_addr(rx_buf, mapping),
- pad + RX_COPY_THRESH,
- DMA_FROM_DEVICE);
- prefetch(((char *)(skb)) + L1_CACHE_BYTES);
+ pad + RX_COPY_THRESH,
+ DMA_FROM_DEVICE);
+ pad += NET_SKB_PAD;
+ prefetch(data + pad); /* speedup eth_type_trans() */
+ /* is this an error packet? */
+ if (unlikely(cqe_fp_flags & ETH_RX_ERROR_FALGS)) {
+ DP(NETIF_MSG_RX_ERR,
+ "ERROR flags %x rx packet %u\n",
+ cqe_fp_flags, sw_comp_cons);
+ fp->eth_q_stats.rx_err_discard_pkt++;
+ goto reuse_rx;
+ }
- /* is this an error packet? */
- if (unlikely(cqe_fp_flags & ETH_RX_ERROR_FALGS)) {
+ /* Since we don't have a jumbo ring
+ * copy small packets if mtu > 1500
+ */
+ if ((bp->dev->mtu > ETH_MAX_PACKET_SIZE) &&
+ (len <= RX_COPY_THRESH)) {
+ skb = netdev_alloc_skb_ip_align(bp->dev, len);
+ if (skb == NULL) {
DP(NETIF_MSG_RX_ERR,
- "ERROR flags %x rx packet %u\n",
- cqe_fp_flags, sw_comp_cons);
- fp->eth_q_stats.rx_err_discard_pkt++;
+ "ERROR packet dropped because of alloc failure\n");
+ fp->eth_q_stats.rx_skb_alloc_failed++;
goto reuse_rx;
}
-
- /* Since we don't have a jumbo ring
- * copy small packets if mtu > 1500
- */
- if ((bp->dev->mtu > ETH_MAX_PACKET_SIZE) &&
- (len <= RX_COPY_THRESH)) {
- struct sk_buff *new_skb;
-
- new_skb = netdev_alloc_skb(bp->dev, len + pad);
- if (new_skb == NULL) {
- DP(NETIF_MSG_RX_ERR,
- "ERROR packet dropped "
- "because of alloc failure\n");
- fp->eth_q_stats.rx_skb_alloc_failed++;
- goto reuse_rx;
- }
-
- /* aligned copy */
- skb_copy_from_linear_data_offset(skb, pad,
- new_skb->data + pad, len);
- skb_reserve(new_skb, pad);
- skb_put(new_skb, len);
-
- bnx2x_reuse_rx_skb(fp, bd_cons, bd_prod);
-
- skb = new_skb;
-
- } else
- if (likely(bnx2x_alloc_rx_skb(bp, fp, bd_prod) == 0)) {
+ memcpy(skb->data, data + pad, len);
+ bnx2x_reuse_rx_data(fp, bd_cons, bd_prod);
+ } else {
+ if (likely(bnx2x_alloc_rx_data(bp, fp, bd_prod) == 0)) {
dma_unmap_single(&bp->pdev->dev,
- dma_unmap_addr(rx_buf, mapping),
+ dma_unmap_addr(rx_buf, mapping),
fp->rx_buf_size,
DMA_FROM_DEVICE);
+ skb = build_skb(data);
+ if (unlikely(!skb)) {
+ kfree(data);
+ fp->eth_q_stats.rx_skb_alloc_failed++;
+ goto next_rx;
+ }
skb_reserve(skb, pad);
- skb_put(skb, len);
-
} else {
DP(NETIF_MSG_RX_ERR,
"ERROR packet dropped because "
"of alloc failure\n");
fp->eth_q_stats.rx_skb_alloc_failed++;
reuse_rx:
- bnx2x_reuse_rx_skb(fp, bd_cons, bd_prod);
+ bnx2x_reuse_rx_data(fp, bd_cons, bd_prod);
goto next_rx;
}
+ skb_put(skb, len);
skb->protocol = eth_type_trans(skb, bp->dev);
/* Set Toeplitz hash for a none-LRO skb */
- bnx2x_set_skb_rxhash(bp, cqe, skb);
+ skb->rxhash = bnx2x_get_rxhash(bp, cqe_fp);
skb_checksum_none_assert(skb);
next_rx:
- rx_buf->skb = NULL;
+ rx_buf->data = NULL;
bd_cons = NEXT_RX_IDX(bd_cons);
bd_prod = NEXT_RX_IDX(bd_prod);
struct sw_rx_bd *first_buf =
&tpa_info->first_buf;
- first_buf->skb = netdev_alloc_skb(bp->dev,
- fp->rx_buf_size);
- if (!first_buf->skb) {
+ first_buf->data = kmalloc(fp->rx_buf_size + NET_SKB_PAD,
+ GFP_ATOMIC);
+ if (!first_buf->data) {
BNX2X_ERR("Failed to allocate TPA "
"skb pool for queue[%d] - "
"disabling TPA on this "
for (i = 0; i < NUM_RX_BD; i++) {
struct sw_rx_bd *rx_buf = &fp->rx_buf_ring[i];
- struct sk_buff *skb = rx_buf->skb;
+ u8 *data = rx_buf->data;
- if (skb == NULL)
+ if (data == NULL)
continue;
dma_unmap_single(&bp->pdev->dev,
dma_unmap_addr(rx_buf, mapping),
fp->rx_buf_size, DMA_FROM_DEVICE);
- rx_buf->skb = NULL;
- dev_kfree_skb(skb);
+ rx_buf->data = NULL;
+ kfree(data);
}
}
for_each_queue(bp, i) {
struct bnx2x_fastpath *fp = &bp->fp[i];
+ u32 mtu;
/* Always use a mini-jumbo MTU for the FCoE L2 ring */
if (IS_FCOE_IDX(i))
* IP_HEADER_ALIGNMENT_PADDING to prevent a buffer
* overrun attack.
*/
- fp->rx_buf_size =
- BNX2X_FCOE_MINI_JUMBO_MTU + ETH_OVREHEAD +
- BNX2X_FW_RX_ALIGN + IP_HEADER_ALIGNMENT_PADDING;
+ mtu = BNX2X_FCOE_MINI_JUMBO_MTU;
else
- fp->rx_buf_size =
- bp->dev->mtu + ETH_OVREHEAD +
- BNX2X_FW_RX_ALIGN + IP_HEADER_ALIGNMENT_PADDING;
+ mtu = bp->dev->mtu;
+ fp->rx_buf_size = BNX2X_FW_RX_ALIGN_START +
+ IP_HEADER_ALIGNMENT_PADDING +
+ ETH_OVREHEAD +
+ mtu +
+ BNX2X_FW_RX_ALIGN_END;
+ /* Note : rx_buf_size doesnt take into account NET_SKB_PAD */
}
}
return 0;
}
-static inline int bnx2x_alloc_rx_skb(struct bnx2x *bp,
- struct bnx2x_fastpath *fp, u16 index)
+static inline int bnx2x_alloc_rx_data(struct bnx2x *bp,
+ struct bnx2x_fastpath *fp, u16 index)
{
- struct sk_buff *skb;
+ u8 *data;
struct sw_rx_bd *rx_buf = &fp->rx_buf_ring[index];
struct eth_rx_bd *rx_bd = &fp->rx_desc_ring[index];
dma_addr_t mapping;
- skb = netdev_alloc_skb(bp->dev, fp->rx_buf_size);
- if (unlikely(skb == NULL))
+ data = kmalloc(fp->rx_buf_size + NET_SKB_PAD, GFP_ATOMIC);
+ if (unlikely(data == NULL))
return -ENOMEM;
- mapping = dma_map_single(&bp->pdev->dev, skb->data, fp->rx_buf_size,
+ mapping = dma_map_single(&bp->pdev->dev, data + NET_SKB_PAD,
+ fp->rx_buf_size,
DMA_FROM_DEVICE);
if (unlikely(dma_mapping_error(&bp->pdev->dev, mapping))) {
- dev_kfree_skb_any(skb);
+ kfree(data);
return -ENOMEM;
}
- rx_buf->skb = skb;
+ rx_buf->data = data;
dma_unmap_addr_set(rx_buf, mapping, mapping);
rx_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
return 0;
}
-/* note that we are not allocating a new skb,
+/* note that we are not allocating a new buffer,
* we are just moving one from cons to prod
* we are not creating a new mapping,
* so there is no need to check for dma_mapping_error().
*/
-static inline void bnx2x_reuse_rx_skb(struct bnx2x_fastpath *fp,
+static inline void bnx2x_reuse_rx_data(struct bnx2x_fastpath *fp,
u16 cons, u16 prod)
{
struct sw_rx_bd *cons_rx_buf = &fp->rx_buf_ring[cons];
dma_unmap_addr_set(prod_rx_buf, mapping,
dma_unmap_addr(cons_rx_buf, mapping));
- prod_rx_buf->skb = cons_rx_buf->skb;
+ prod_rx_buf->data = cons_rx_buf->data;
*prod_bd = *cons_bd;
}
for (i = 0; i < last; i++) {
struct bnx2x_agg_info *tpa_info = &fp->tpa_info[i];
struct sw_rx_bd *first_buf = &tpa_info->first_buf;
- struct sk_buff *skb = first_buf->skb;
+ u8 *data = first_buf->data;
- if (skb == NULL) {
+ if (data == NULL) {
DP(NETIF_MSG_IFDOWN, "tpa bin %d empty on free\n", i);
continue;
}
dma_unmap_single(&bp->pdev->dev,
dma_unmap_addr(first_buf, mapping),
fp->rx_buf_size, DMA_FROM_DEVICE);
- dev_kfree_skb(skb);
- first_buf->skb = NULL;
+ kfree(data);
+ first_buf->data = NULL;
}
}
* fp->eth_q_stats.rx_skb_alloc_failed = 0
*/
for (i = 0; i < rx_ring_size; i++) {
- if (bnx2x_alloc_rx_skb(bp, fp, ring_prod) < 0) {
+ if (bnx2x_alloc_rx_data(bp, fp, ring_prod) < 0) {
fp->eth_q_stats.rx_skb_alloc_failed++;
continue;
}
git.openpandora.org / pandora-kernel.git / commitdiff