From 2fc28de5989e1c40fee4e92e2a8f3bdd47b1b34a Mon Sep 17 00:00:00 2001 From: Arik Nemtsov Date: Thu, 10 May 2012 12:13:27 +0300 Subject: [PATCH] wlcore/wl18xx: add hw op for setting Tx HW checksum Some chip families are capable of checksumming certain classes of Tx packets in HW. Indicate this fact in the netdev features and perform the HW checksum by protocol type for the 18xx family. Fix the location of the skb network header when we move it so we can rely on it when setting the checksum. Signed-off-by: Arik Nemtsov Signed-off-by: Luciano Coelho --- drivers/net/wireless/ti/wl12xx/main.c | 8 +++++++ drivers/net/wireless/ti/wl18xx/acx.c | 26 +++++++++++++++++++++ drivers/net/wireless/ti/wl18xx/acx.h | 16 +++++++++++++ drivers/net/wireless/ti/wl18xx/main.c | 31 +++++++++++++++++++++++++ drivers/net/wireless/ti/wlcore/acx.h | 1 + drivers/net/wireless/ti/wlcore/hw_ops.h | 11 +++++++++ drivers/net/wireless/ti/wlcore/tx.c | 3 ++- drivers/net/wireless/ti/wlcore/tx.h | 11 ++++++++- drivers/net/wireless/ti/wlcore/wlcore.h | 3 +++ 9 files changed, 108 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ti/wl12xx/main.c b/drivers/net/wireless/ti/wl12xx/main.c index d7dd3def07b5..8141447e8f96 100644 --- a/drivers/net/wireless/ti/wl12xx/main.c +++ b/drivers/net/wireless/ti/wl12xx/main.c @@ -1288,6 +1288,13 @@ static void wl12xx_get_mac(struct wl1271 *wl) wl12xx_get_fuse_mac(wl); } +static void wl12xx_set_tx_desc_csum(struct wl1271 *wl, + struct wl1271_tx_hw_descr *desc, + struct sk_buff *skb) +{ + desc->wl12xx_reserved = 0; +} + static struct wlcore_ops wl12xx_ops = { .identify_chip = wl12xx_identify_chip, .identify_fw = wl12xx_identify_fw, @@ -1306,6 +1313,7 @@ static struct wlcore_ops wl12xx_ops = { .sta_get_ap_rate_mask = wl12xx_sta_get_ap_rate_mask, .get_pg_ver = wl12xx_get_pg_ver, .get_mac = wl12xx_get_mac, + .set_tx_desc_csum = wl12xx_set_tx_desc_csum, }; static struct ieee80211_sta_ht_cap wl12xx_ht_cap = { diff --git a/drivers/net/wireless/ti/wl18xx/acx.c b/drivers/net/wireless/ti/wl18xx/acx.c index aed8d0dff91b..3379db23a165 100644 --- a/drivers/net/wireless/ti/wl18xx/acx.c +++ b/drivers/net/wireless/ti/wl18xx/acx.c @@ -55,3 +55,29 @@ out: return ret; } + +int wl18xx_acx_set_checksum_state(struct wl1271 *wl) +{ + struct wl18xx_acx_checksum_state *acx; + int ret; + + wl1271_debug(DEBUG_ACX, "acx checksum state"); + + acx = kzalloc(sizeof(*acx), GFP_KERNEL); + if (!acx) { + ret = -ENOMEM; + goto out; + } + + acx->checksum_state = CHECKSUM_OFFLOAD_ENABLED; + + ret = wl1271_cmd_configure(wl, ACX_CHECKSUM_CONFIG, acx, sizeof(*acx)); + if (ret < 0) { + wl1271_warning("failed to set Tx checksum state: %d", ret); + goto out; + } + +out: + kfree(acx); + return ret; +} diff --git a/drivers/net/wireless/ti/wl18xx/acx.h b/drivers/net/wireless/ti/wl18xx/acx.h index c8eebd8500c1..544db6ef3841 100644 --- a/drivers/net/wireless/ti/wl18xx/acx.h +++ b/drivers/net/wireless/ti/wl18xx/acx.h @@ -45,8 +45,24 @@ struct wl18xx_acx_host_config_bitmap { } __packed; +enum { + CHECKSUM_OFFLOAD_DISABLED = 0, + CHECKSUM_OFFLOAD_ENABLED = 1, + CHECKSUM_OFFLOAD_FAKE_RX = 2, + CHECKSUM_OFFLOAD_INVALID = 0xFF +}; + +struct wl18xx_acx_checksum_state { + struct acx_header header; + + /* enum acx_checksum_state */ + u8 checksum_state; + u8 pad[3]; +} __packed; + int wl18xx_acx_host_if_cfg_bitmap(struct wl1271 *wl, u32 host_cfg_bitmap, u32 sdio_blk_size, u32 extra_mem_blks, u32 len_field_size); +int wl18xx_acx_set_checksum_state(struct wl1271 *wl); #endif /* __WL12XX_ACX_H__ */ diff --git a/drivers/net/wireless/ti/wl18xx/main.c b/drivers/net/wireless/ti/wl18xx/main.c index 1e0719c7ccb9..c47f52c81a72 100644 --- a/drivers/net/wireless/ti/wl18xx/main.c +++ b/drivers/net/wireless/ti/wl18xx/main.c @@ -21,6 +21,7 @@ #include #include +#include #include "../wlcore/wlcore.h" #include "../wlcore/debug.h" @@ -501,9 +502,38 @@ static int wl18xx_hw_init(struct wl1271 *wl) if (ret < 0) return ret; + ret = wl18xx_acx_set_checksum_state(wl); + if (ret != 0) + return ret; + return ret; } +static void wl18xx_set_tx_desc_csum(struct wl1271 *wl, + struct wl1271_tx_hw_descr *desc, + struct sk_buff *skb) +{ + u32 ip_hdr_offset; + struct iphdr *ip_hdr; + + if (skb->ip_summed != CHECKSUM_PARTIAL) { + desc->wl18xx_checksum_data = 0; + return; + } + + ip_hdr_offset = skb_network_header(skb) - skb_mac_header(skb); + if (WARN_ON(ip_hdr_offset >= (1<<7))) { + desc->wl18xx_checksum_data = 0; + return; + } + + desc->wl18xx_checksum_data = ip_hdr_offset << 1; + + /* FW is interested only in the LSB of the protocol TCP=0 UDP=1 */ + ip_hdr = (void *)skb_network_header(skb); + desc->wl18xx_checksum_data |= (ip_hdr->protocol & 0x01); +} + static struct wlcore_ops wl18xx_ops = { .identify_chip = wl18xx_identify_chip, .boot = wl18xx_boot, @@ -517,6 +547,7 @@ static struct wlcore_ops wl18xx_ops = { .tx_immediate_compl = wl18xx_tx_immediate_completion, .tx_delayed_compl = NULL, .hw_init = wl18xx_hw_init, + .set_tx_desc_csum = wl18xx_set_tx_desc_csum, }; int __devinit wl18xx_probe(struct platform_device *pdev) diff --git a/drivers/net/wireless/ti/wlcore/acx.h b/drivers/net/wireless/ti/wlcore/acx.h index 2d1302d23ac8..ff0c5ba8e8ff 100644 --- a/drivers/net/wireless/ti/wlcore/acx.h +++ b/drivers/net/wireless/ti/wlcore/acx.h @@ -1245,6 +1245,7 @@ enum { ACX_CONFIG_HANGOVER = 0x0042, ACX_FEATURE_CFG = 0x0043, ACX_PROTECTION_CFG = 0x0044, + ACX_CHECKSUM_CONFIG = 0x0045, }; diff --git a/drivers/net/wireless/ti/wlcore/hw_ops.h b/drivers/net/wireless/ti/wlcore/hw_ops.h index 9384b4d56c24..4573249ea89f 100644 --- a/drivers/net/wireless/ti/wlcore/hw_ops.h +++ b/drivers/net/wireless/ti/wlcore/hw_ops.h @@ -119,4 +119,15 @@ static inline int wlcore_identify_fw(struct wl1271 *wl) return 0; } +static inline void +wlcore_hw_set_tx_desc_csum(struct wl1271 *wl, + struct wl1271_tx_hw_descr *desc, + struct sk_buff *skb) +{ + if (!wl->ops->set_tx_desc_csum) + BUG_ON(1); + + wl->ops->set_tx_desc_csum(wl, desc, skb); +} + #endif diff --git a/drivers/net/wireless/ti/wlcore/tx.c b/drivers/net/wireless/ti/wlcore/tx.c index b4e02ef22fc5..44e4e7bb29bd 100644 --- a/drivers/net/wireless/ti/wlcore/tx.c +++ b/drivers/net/wireless/ti/wlcore/tx.c @@ -270,6 +270,7 @@ static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif, if (extra) { int hdrlen = ieee80211_hdrlen(frame_control); memmove(frame_start, hdr, hdrlen); + skb_set_network_header(skb, skb_network_offset(skb) + extra); } /* configure packet life time */ @@ -332,9 +333,9 @@ static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif, ieee80211_has_protected(frame_control)) tx_attr |= TX_HW_ATTR_HOST_ENCRYPT; - desc->reserved = 0; desc->tx_attr = cpu_to_le16(tx_attr); + wlcore_hw_set_tx_desc_csum(wl, desc, skb); wlcore_hw_set_tx_desc_data_len(wl, desc, skb); } diff --git a/drivers/net/wireless/ti/wlcore/tx.h b/drivers/net/wireless/ti/wlcore/tx.h index 220727421fa2..e24c436bf65f 100644 --- a/drivers/net/wireless/ti/wlcore/tx.h +++ b/drivers/net/wireless/ti/wlcore/tx.h @@ -130,7 +130,16 @@ struct wl1271_tx_hw_descr { u8 tid; /* host link ID (HLID) */ u8 hlid; - u8 reserved; + + union { + u8 wl12xx_reserved; + + /* + * bit 0 -> 0 = udp, 1 = tcp + * bit 1:7 -> IP header offset + */ + u8 wl18xx_checksum_data; + } __packed; } __packed; enum wl1271_tx_hw_res_status { diff --git a/drivers/net/wireless/ti/wlcore/wlcore.h b/drivers/net/wireless/ti/wlcore/wlcore.h index 0b3f0b586f4b..c062d304ab0d 100644 --- a/drivers/net/wireless/ti/wlcore/wlcore.h +++ b/drivers/net/wireless/ti/wlcore/wlcore.h @@ -61,6 +61,9 @@ struct wlcore_ops { struct wl12xx_vif *wlvif); s8 (*get_pg_ver)(struct wl1271 *wl); void (*get_mac)(struct wl1271 *wl); + void (*set_tx_desc_csum)(struct wl1271 *wl, + struct wl1271_tx_hw_descr *desc, + struct sk_buff *skb); }; enum wlcore_partitions { -- 2.20.1