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wil6210: fix max. MPDU size 

When configuring Tx/Rx VRING's, driver need to specify max. MPDU size
It should take into account all overhead introduced by 802.3->208.11
transformation.

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Vladimir Kondratiev 2014-12-23 09:47:11 +02:00 committed by Kalle Valo
parent 26a359d914
commit c44690a157
5 changed files with 16 additions and 6 deletions
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2
drivers/net/wireless/ath/wil6210/main.c
View File

@ -41,7 +41,7 @@ MODULE_PARM_DESC(itr_trsh, " Interrupt moderation threshold, usecs.");
/* We allow allocation of more than 1 page buffers to support large packets.
* It is suboptimal behavior performance wise in case MTU above page size.
*/
unsigned int mtu_max = TXRX_BUF_LEN_DEFAULT - ETH_HLEN;
unsigned int mtu_max = TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD;
static int mtu_max_set(const char *val, const struct kernel_param *kp)
{
int ret;

2
drivers/net/wireless/ath/wil6210/txrx.c
View File

@ -645,7 +645,7 @@ int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size,
.vring_cfg = {
.tx_sw_ring = {
.max_mpdu_size =
cpu_to_le16(mtu_max + ETH_HLEN),
cpu_to_le16(wil_mtu2macbuf(mtu_max)),
.ring_size = cpu_to_le16(size),
},
.ringid = id,

4
drivers/net/wireless/ath/wil6210/txrx.h
View File

@ -20,8 +20,8 @@
#define BUF_SW_OWNED (1)
#define BUF_HW_OWNED (0)
/* size of max. Tx/Rx buffers, as supported by FW */
#define TXRX_BUF_LEN_DEFAULT (2242)
/* default size of MAC Tx/Rx buffers */
#define TXRX_BUF_LEN_DEFAULT (2048)
/* how many bytes to reserve for rtap header? */
#define WIL6210_RTAP_SIZE (128)

12
drivers/net/wireless/ath/wil6210/wil6210.h
View File

@ -62,11 +62,21 @@ static inline u32 WIL_GET_BITS(u32 x, int b0, int b1)
#define WIL_MAX_AGG_WSIZE (32) /* FW/HW limit */
/* Hardware offload block adds the following:
* 26 bytes - 3-address QoS data header
* 8 bytes - IV + EIV (for GCMP)
* 8 bytes - SNAP
* 16 bytes - MIC (for GCMP)
* 4 bytes - CRC
* 24 bytes - security related (if connection is secure)
*/
#define WIL_MAX_MPDU_OVERHEAD (62)
/* Calculate MAC buffer size for the firmware. It includes all overhead,
* as it will go over the air, and need to be 8 byte aligned
*/
static inline u32 wil_mtu2macbuf(u32 mtu)
{
return ALIGN(mtu + WIL_MAX_MPDU_OVERHEAD, 8);
}
/* Max supported by wil6210 value for interrupt threshold is 5sec. */
#define WIL6210_ITR_TRSH_MAX (5000000)
#define WIL6210_ITR_TRSH_DEFAULT (300) /* usec */

2
drivers/net/wireless/ath/wil6210/wmi.c
View File

@ -1083,7 +1083,7 @@ int wmi_rx_chain_add(struct wil6210_priv *wil, struct vring *vring)
struct wmi_cfg_rx_chain_cmd cmd = {
.action = WMI_RX_CHAIN_ADD,
.rx_sw_ring = {
.max_mpdu_size = cpu_to_le16(mtu_max + ETH_HLEN),
.max_mpdu_size = cpu_to_le16(wil_mtu2macbuf(mtu_max)),
.ring_mem_base = cpu_to_le64(vring->pa),
.ring_size = cpu_to_le16(vring->size),
},