diff options
Diffstat (limited to 'drivers/net/wireless/ath/wil6210/txrx.c')
| -rw-r--r-- | drivers/net/wireless/ath/wil6210/txrx.c | 76 |
1 files changed, 74 insertions, 2 deletions
diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c index e563af13740b..ea1abeb18e5b 100644 --- a/drivers/net/wireless/ath/wil6210/txrx.c +++ b/drivers/net/wireless/ath/wil6210/txrx.c @@ -18,6 +18,9 @@ #include <net/ieee80211_radiotap.h> #include <linux/if_arp.h> #include <linux/moduleparam.h> +#include <linux/ip.h> +#include <linux/ipv6.h> +#include <net/ipv6.h> #include "wil6210.h" #include "wmi.h" @@ -407,6 +410,21 @@ static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, return NULL; } + /* L4 IDENT is on when HW calculated checksum, check status + * and in case of error drop the packet + * higher stack layers will handle retransmission (if required) + */ + if (d->dma.status & RX_DMA_STATUS_L4_IDENT) { + /* L4 protocol identified, csum calculated */ + if ((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0) { + skb->ip_summed = CHECKSUM_UNNECESSARY; + } else { + wil_err(wil, "Incorrect checksum reported\n"); + kfree_skb(skb); + return NULL; + } + } + ds_bits = wil_rxdesc_ds_bits(d); if (ds_bits == 1) { /* @@ -646,6 +664,53 @@ static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, return 0; } +static int wil_tx_desc_offload_cksum_set(struct wil6210_priv *wil, + struct vring_tx_desc *d, + struct sk_buff *skb) +{ + int protocol; + + if (skb->ip_summed != CHECKSUM_PARTIAL) + return 0; + + switch (skb->protocol) { + case cpu_to_be16(ETH_P_IP): + protocol = ip_hdr(skb)->protocol; + break; + case cpu_to_be16(ETH_P_IPV6): + protocol = ipv6_hdr(skb)->nexthdr; + break; + default: + return -EINVAL; + } + + switch (protocol) { + case IPPROTO_TCP: + d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); + /* L4 header len: TCP header length */ + d->dma.d0 |= + (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); + break; + case IPPROTO_UDP: + /* L4 header len: UDP header length */ + d->dma.d0 |= + (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); + break; + default: + return -EINVAL; + } + + d->dma.ip_length = skb_network_header_len(skb); + d->dma.b11 = ETH_HLEN; /* MAC header length */ + d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); + /* Enable TCP/UDP checksum */ + d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); + /* Calculate pseudo-header */ + d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); + + return 0; +} + static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, struct sk_buff *skb) { @@ -655,7 +720,7 @@ static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, u32 swhead = vring->swhead; int avail = wil_vring_avail_tx(vring); int nr_frags = skb_shinfo(skb)->nr_frags; - uint f; + uint f = 0; int vring_index = vring - wil->vring_tx; uint i = swhead; dma_addr_t pa; @@ -686,13 +751,20 @@ static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, return -EINVAL; /* 1-st segment */ wil_tx_desc_map(d, pa, skb_headlen(skb), vring_index); + /* Process TCP/UDP checksum offloading */ + if (wil_tx_desc_offload_cksum_set(wil, d, skb)) { + wil_err(wil, "VRING #%d Failed to set cksum, drop packet\n", + vring_index); + goto dma_error; + } + d->mac.d[2] |= ((nr_frags + 1) << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); if (nr_frags) *_d = *d; /* middle segments */ - for (f = 0; f < nr_frags; f++) { + for (; f < nr_frags; f++) { const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[f]; int len = skb_frag_size(frag); |