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Message-Id: <1277328688.2101.12.camel@achroite.uk.solarflarecom.com>
Date: Wed, 23 Jun 2010 22:31:28 +0100
From: Ben Hutchings <bhutchings@...arflare.com>
To: David Miller <davem@...emloft.net>
Cc: netdev@...r.kernel.org, linux-net-drivers@...arflare.com
Subject: [PATCH net-next-2.6 5/5] sfc: Record hardware RX hash on each skb
where possible
Signed-off-by: Ben Hutchings <bhutchings@...arflare.com>
---
drivers/net/sfc/efx.c | 1 +
drivers/net/sfc/ethtool.c | 12 ++++++++++++
drivers/net/sfc/falcon.c | 4 +++-
drivers/net/sfc/net_driver.h | 4 +++-
drivers/net/sfc/rx.c | 23 +++++++++++++++++++++++
drivers/net/sfc/selftest.c | 3 +++
drivers/net/sfc/siena.c | 5 ++++-
7 files changed, 49 insertions(+), 3 deletions(-)
diff --git a/drivers/net/sfc/efx.c b/drivers/net/sfc/efx.c
index ad35911..d68f061 100644
--- a/drivers/net/sfc/efx.c
+++ b/drivers/net/sfc/efx.c
@@ -480,6 +480,7 @@ static void efx_init_channels(struct efx_nic *efx)
*/
efx->rx_buffer_len = (max(EFX_PAGE_IP_ALIGN, NET_IP_ALIGN) +
EFX_MAX_FRAME_LEN(efx->net_dev->mtu) +
+ efx->type->rx_buffer_hash_size +
efx->type->rx_buffer_padding);
efx->rx_buffer_order = get_order(efx->rx_buffer_len +
sizeof(struct efx_rx_page_state));
diff --git a/drivers/net/sfc/ethtool.c b/drivers/net/sfc/ethtool.c
index dde21a8..7693cfb 100644
--- a/drivers/net/sfc/ethtool.c
+++ b/drivers/net/sfc/ethtool.c
@@ -546,6 +546,17 @@ static u32 efx_ethtool_get_rx_csum(struct net_device *net_dev)
return efx->rx_checksum_enabled;
}
+static int efx_ethtool_set_flags(struct net_device *net_dev, u32 data)
+{
+ struct efx_nic *efx = netdev_priv(net_dev);
+ u32 supported = efx->type->offload_features & ETH_FLAG_RXHASH;
+
+ if (data & ~supported)
+ return -EOPNOTSUPP;
+
+ return ethtool_op_set_flags(net_dev, data);
+}
+
static void efx_ethtool_self_test(struct net_device *net_dev,
struct ethtool_test *test, u64 *data)
{
@@ -888,6 +899,7 @@ const struct ethtool_ops efx_ethtool_ops = {
/* Need to enable/disable TSO-IPv6 too */
.set_tso = efx_ethtool_set_tso,
.get_flags = ethtool_op_get_flags,
+ .set_flags = efx_ethtool_set_flags,
.get_sset_count = efx_ethtool_get_sset_count,
.self_test = efx_ethtool_self_test,
.get_strings = efx_ethtool_get_strings,
diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index 92d38ed..5a40145 100644
--- a/drivers/net/sfc/falcon.c
+++ b/drivers/net/sfc/falcon.c
@@ -1581,6 +1581,7 @@ static void falcon_init_rx_cfg(struct efx_nic *efx)
EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XOFF_MAC_TH, data_xoff_thr);
EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XON_TX_TH, ctrl_xon_thr);
EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XOFF_TX_TH, ctrl_xoff_thr);
+ EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_HASH_INSRT_HDR, 1);
EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_INGR_EN, 1);
}
/* Always enable XOFF signal from RX FIFO. We enable
@@ -1861,6 +1862,7 @@ struct efx_nic_type falcon_b0_nic_type = {
.evq_ptr_tbl_base = FR_BZ_EVQ_PTR_TBL,
.evq_rptr_tbl_base = FR_BZ_EVQ_RPTR,
.max_dma_mask = DMA_BIT_MASK(FSF_AZ_TX_KER_BUF_ADDR_WIDTH),
+ .rx_buffer_hash_size = 0x10,
.rx_buffer_padding = 0,
.max_interrupt_mode = EFX_INT_MODE_MSIX,
.phys_addr_channels = 32, /* Hardware limit is 64, but the legacy
@@ -1868,7 +1870,7 @@ struct efx_nic_type falcon_b0_nic_type = {
* channels */
.tx_dc_base = 0x130000,
.rx_dc_base = 0x100000,
- .offload_features = NETIF_F_IP_CSUM,
+ .offload_features = NETIF_F_IP_CSUM | NETIF_F_RXHASH,
.reset_world_flags = ETH_RESET_IRQ,
};
diff --git a/drivers/net/sfc/net_driver.h b/drivers/net/sfc/net_driver.h
index 6a901c8..8b17c92 100644
--- a/drivers/net/sfc/net_driver.h
+++ b/drivers/net/sfc/net_driver.h
@@ -845,7 +845,8 @@ static inline unsigned int efx_port_num(struct efx_nic *efx)
* @evq_ptr_tbl_base: Event queue pointer table base address
* @evq_rptr_tbl_base: Event queue read-pointer table base address
* @max_dma_mask: Maximum possible DMA mask
- * @rx_buffer_padding: Padding added to each RX buffer
+ * @rx_buffer_hash_size: Size of hash at start of RX buffer
+ * @rx_buffer_padding: Size of padding at end of RX buffer
* @max_interrupt_mode: Highest capability interrupt mode supported
* from &enum efx_init_mode.
* @phys_addr_channels: Number of channels with physically addressed
@@ -889,6 +890,7 @@ struct efx_nic_type {
unsigned int evq_ptr_tbl_base;
unsigned int evq_rptr_tbl_base;
u64 max_dma_mask;
+ unsigned int rx_buffer_hash_size;
unsigned int rx_buffer_padding;
unsigned int max_interrupt_mode;
unsigned int phys_addr_channels;
diff --git a/drivers/net/sfc/rx.c b/drivers/net/sfc/rx.c
index d9ed20e..0fb9835 100644
--- a/drivers/net/sfc/rx.c
+++ b/drivers/net/sfc/rx.c
@@ -101,6 +101,19 @@ static inline unsigned int efx_rx_buf_size(struct efx_nic *efx)
return PAGE_SIZE << efx->rx_buffer_order;
}
+static inline u32 efx_rx_buf_hash(struct efx_rx_buffer *buf)
+{
+#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) || NET_IP_ALIGN % 4 == 0
+ return __le32_to_cpup((const __le32 *)buf->data);
+#else
+ const u8 *data = (const u8 *)buf->data;
+ return ((u32)data[0] |
+ (u32)data[1] << 8 |
+ (u32)data[2] << 16 |
+ (u32)data[3] << 24);
+#endif
+}
+
/**
* efx_init_rx_buffers_skb - create EFX_RX_BATCH skb-based RX buffers
*
@@ -441,6 +454,7 @@ static void efx_rx_packet_lro(struct efx_channel *channel,
/* Pass the skb/page into the LRO engine */
if (rx_buf->page) {
+ struct efx_nic *efx = channel->efx;
struct page *page = rx_buf->page;
struct sk_buff *skb;
@@ -453,6 +467,11 @@ static void efx_rx_packet_lro(struct efx_channel *channel,
return;
}
+ if (efx->net_dev->features & NETIF_F_RXHASH)
+ skb->rxhash = efx_rx_buf_hash(rx_buf);
+ rx_buf->data += efx->type->rx_buffer_hash_size;
+ rx_buf->len -= efx->type->rx_buffer_hash_size;
+
skb_shinfo(skb)->frags[0].page = page;
skb_shinfo(skb)->frags[0].page_offset =
efx_rx_buf_offset(rx_buf);
@@ -572,6 +591,10 @@ void __efx_rx_packet(struct efx_channel *channel,
skb_put(rx_buf->skb, rx_buf->len);
+ if (efx->net_dev->features & NETIF_F_RXHASH)
+ rx_buf->skb->rxhash = efx_rx_buf_hash(rx_buf);
+ skb_pull(rx_buf->skb, efx->type->rx_buffer_hash_size);
+
/* Move past the ethernet header. rx_buf->data still points
* at the ethernet header */
rx_buf->skb->protocol = eth_type_trans(rx_buf->skb,
diff --git a/drivers/net/sfc/selftest.c b/drivers/net/sfc/selftest.c
index 85f015f..0399be2 100644
--- a/drivers/net/sfc/selftest.c
+++ b/drivers/net/sfc/selftest.c
@@ -258,6 +258,9 @@ void efx_loopback_rx_packet(struct efx_nic *efx,
payload = &state->payload;
+ buf_ptr += efx->type->rx_buffer_hash_size;
+ pkt_len -= efx->type->rx_buffer_hash_size;
+
received = (struct efx_loopback_payload *) buf_ptr;
received->ip.saddr = payload->ip.saddr;
if (state->offload_csum)
diff --git a/drivers/net/sfc/siena.c b/drivers/net/sfc/siena.c
index 59d1dc6..f1741b4 100644
--- a/drivers/net/sfc/siena.c
+++ b/drivers/net/sfc/siena.c
@@ -331,6 +331,7 @@ static int siena_init_nic(struct efx_nic *efx)
efx_reado(efx, &temp, FR_AZ_RX_CFG);
EFX_SET_OWORD_FIELD(temp, FRF_BZ_RX_DESC_PUSH_EN, 0);
+ EFX_SET_OWORD_FIELD(temp, FRF_BZ_RX_HASH_INSRT_HDR, 1);
EFX_SET_OWORD_FIELD(temp, FRF_BZ_RX_INGR_EN, 1);
efx_writeo(efx, &temp, FR_AZ_RX_CFG);
@@ -636,6 +637,7 @@ struct efx_nic_type siena_a0_nic_type = {
.evq_ptr_tbl_base = FR_BZ_EVQ_PTR_TBL,
.evq_rptr_tbl_base = FR_BZ_EVQ_RPTR,
.max_dma_mask = DMA_BIT_MASK(FSF_AZ_TX_KER_BUF_ADDR_WIDTH),
+ .rx_buffer_hash_size = 0x10,
.rx_buffer_padding = 0,
.max_interrupt_mode = EFX_INT_MODE_MSIX,
.phys_addr_channels = 32, /* Hardware limit is 64, but the legacy
@@ -643,6 +645,7 @@ struct efx_nic_type siena_a0_nic_type = {
* channels */
.tx_dc_base = 0x88000,
.rx_dc_base = 0x68000,
- .offload_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM,
+ .offload_features = (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
+ NETIF_F_RXHASH),
.reset_world_flags = ETH_RESET_MGMT << ETH_RESET_SHARED_SHIFT,
};
--
1.6.2.5
--
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.
--
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