diff options
author | Avinash Patil <patila@marvell.com> | 2015-02-13 17:41:08 +0530 |
---|---|---|
committer | Kalle Valo <kvalo@codeaurora.org> | 2015-02-27 10:12:44 +0200 |
commit | 31def91b3a192bd414d87b3a408de34eed94d616 (patch) | |
tree | 16c8b41024c1a91138ada14cc577c3627037c61e /drivers/net | |
parent | 1c4c24eb7e96b3f8aeb9a2b7937ed7bb33aadd69 (diff) | |
download | linux-stable-31def91b3a192bd414d87b3a408de34eed94d616.tar.gz linux-stable-31def91b3a192bd414d87b3a408de34eed94d616.tar.bz2 linux-stable-31def91b3a192bd414d87b3a408de34eed94d616.zip |
mwifiex: DMA alignment for RX packets
This patch adds support for DMA alignment of sk_buffs
allocated for RX.
Patch also adds support to modify skb allocation flags.
Signed-off-by: Marc Yang <yangyang@marvell.com>
Signed-off-by: Qingshui Gao <gaoqs@marvell.com>
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net')
-rw-r--r-- | drivers/net/wireless/mwifiex/decl.h | 1 | ||||
-rw-r--r-- | drivers/net/wireless/mwifiex/main.h | 4 | ||||
-rw-r--r-- | drivers/net/wireless/mwifiex/pcie.c | 6 | ||||
-rw-r--r-- | drivers/net/wireless/mwifiex/sdio.c | 5 | ||||
-rw-r--r-- | drivers/net/wireless/mwifiex/util.c | 23 |
5 files changed, 35 insertions, 4 deletions
diff --git a/drivers/net/wireless/mwifiex/decl.h b/drivers/net/wireless/mwifiex/decl.h index 88d0eade6bb1..cf2fa110e251 100644 --- a/drivers/net/wireless/mwifiex/decl.h +++ b/drivers/net/wireless/mwifiex/decl.h @@ -33,6 +33,7 @@ #define MWIFIEX_MAX_BSS_NUM (3) #define MWIFIEX_DMA_ALIGN_SZ 64 +#define MWIFIEX_RX_HEADROOM 64 #define MAX_TXPD_SZ 32 #define INTF_HDR_ALIGN 4 diff --git a/drivers/net/wireless/mwifiex/main.h b/drivers/net/wireless/mwifiex/main.h index 2089a3084043..16be45e9a66a 100644 --- a/drivers/net/wireless/mwifiex/main.h +++ b/drivers/net/wireless/mwifiex/main.h @@ -140,6 +140,9 @@ enum { #define MWIFIEX_DRV_INFO_SIZE_MAX 0x40000 +/* Address alignment */ +#define MWIFIEX_ALIGN_ADDR(p, a) (((long)(p) + (a) - 1) & ~((a) - 1)) + struct mwifiex_dbg { u32 num_cmd_host_to_card_failure; u32 num_cmd_sleep_cfm_host_to_card_failure; @@ -1418,6 +1421,7 @@ u8 mwifiex_adjust_data_rate(struct mwifiex_private *priv, u8 rx_rate, u8 ht_info); void mwifiex_dump_drv_info(struct mwifiex_adapter *adapter); +void *mwifiex_alloc_rx_buf(int rx_len, gfp_t flags); #ifdef CONFIG_DEBUG_FS void mwifiex_debugfs_init(void); diff --git a/drivers/net/wireless/mwifiex/pcie.c b/drivers/net/wireless/mwifiex/pcie.c index 0640bd67077c..4b463c3b9906 100644 --- a/drivers/net/wireless/mwifiex/pcie.c +++ b/drivers/net/wireless/mwifiex/pcie.c @@ -498,7 +498,8 @@ static int mwifiex_init_rxq_ring(struct mwifiex_adapter *adapter) for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) { /* Allocate skb here so that firmware can DMA data from it */ - skb = dev_alloc_skb(MWIFIEX_RX_DATA_BUF_SIZE); + skb = mwifiex_alloc_rx_buf(MWIFIEX_RX_DATA_BUF_SIZE, + GFP_KERNEL | GFP_DMA); if (!skb) { dev_err(adapter->dev, "Unable to allocate skb for RX ring.\n"); @@ -1297,7 +1298,8 @@ static int mwifiex_pcie_process_recv_data(struct mwifiex_adapter *adapter) } } - skb_tmp = dev_alloc_skb(MWIFIEX_RX_DATA_BUF_SIZE); + skb_tmp = mwifiex_alloc_rx_buf(MWIFIEX_RX_DATA_BUF_SIZE, + GFP_KERNEL | GFP_DMA); if (!skb_tmp) { dev_err(adapter->dev, "Unable to allocate skb.\n"); diff --git a/drivers/net/wireless/mwifiex/sdio.c b/drivers/net/wireless/mwifiex/sdio.c index 78a9e863a934..57d85ab442bf 100644 --- a/drivers/net/wireless/mwifiex/sdio.c +++ b/drivers/net/wireless/mwifiex/sdio.c @@ -1357,7 +1357,7 @@ static int mwifiex_process_int_status(struct mwifiex_adapter *adapter) return -1; rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE); - skb = dev_alloc_skb(rx_len); + skb = mwifiex_alloc_rx_buf(rx_len, GFP_KERNEL | GFP_DMA); if (!skb) return -1; @@ -1454,7 +1454,8 @@ static int mwifiex_process_int_status(struct mwifiex_adapter *adapter) } rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE); - skb = dev_alloc_skb(rx_len); + skb = mwifiex_alloc_rx_buf(rx_len, + GFP_KERNEL | GFP_DMA); if (!skb) { dev_err(adapter->dev, "%s: failed to alloc skb", diff --git a/drivers/net/wireless/mwifiex/util.c b/drivers/net/wireless/mwifiex/util.c index 47e215b6d5f5..2148a573396b 100644 --- a/drivers/net/wireless/mwifiex/util.c +++ b/drivers/net/wireless/mwifiex/util.c @@ -631,3 +631,26 @@ void mwifiex_hist_data_reset(struct mwifiex_private *priv) for (ix = 0; ix < MWIFIEX_MAX_SIG_STRENGTH; ix++) atomic_set(&phist_data->sig_str[ix], 0); } + +void *mwifiex_alloc_rx_buf(int rx_len, gfp_t flags) +{ + struct sk_buff *skb; + int buf_len, pad; + + buf_len = rx_len + MWIFIEX_RX_HEADROOM + MWIFIEX_DMA_ALIGN_SZ; + + skb = __dev_alloc_skb(buf_len, flags); + + if (!skb) + return NULL; + + skb_reserve(skb, MWIFIEX_RX_HEADROOM); + + pad = MWIFIEX_ALIGN_ADDR(skb->data, MWIFIEX_DMA_ALIGN_SZ) - + (long)skb->data; + + skb_reserve(skb, pad); + + return skb; +} +EXPORT_SYMBOL_GPL(mwifiex_alloc_rx_buf); |