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staging: vt6656: vnt_get_rtscts_rsvtime_le replace with rts/cts duration. 

rsvtime is the time needed in firmware to process the received
frame time in firmware so they can be the same as vnt_get_rts_duration
or vnt_get_cts_duration where appropriate.

The rts_rrv_time are now all the same timing in vnt_rxtx_rts.

So vnt_get_rtscts_rsvtime_le and and vnt_get_frame_time are no longer
required.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Link: https://lore.kernel.org/r/4c0fe356-7e08-bf66-58b7-5ab683ba9536@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Malcolm Priestley 2020-05-05 22:19:45 +01:00 committed by Greg Kroah-Hartman
parent 8e7128f63d
commit 61bb798767
1 changed files with 5 additions and 108 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

113
drivers/staging/vt6656/rxtx.c
View File

@ -13,7 +13,6 @@
*
* Functions:
* vnt_generate_tx_parameter - Generate tx dma required parameter.
* vnt_get_rtscts_rsvtime_le- get rts/cts reserved time
* vnt_get_rsvtime- get frame reserved time
* vnt_fill_cts_head- fulfill CTS ctl header
*
@ -92,37 +91,6 @@ static struct vnt_usb_send_context
return NULL;
}
/* Frame time for Tx */
static unsigned int vnt_get_frame_time(u8 preamble_type, u8 pkt_type,
unsigned int frame_length, u16 tx_rate)
{
unsigned int frame_time;
unsigned int preamble;
unsigned int rate;
if (tx_rate > RATE_54M)
return 0;
rate = (unsigned int)vnt_frame_time[tx_rate];
if (tx_rate <= RATE_11M) {
if (preamble_type == PREAMBLE_SHORT)
preamble = 96;
else
preamble = 192;
frame_time = DIV_ROUND_UP(frame_length * 80, rate);
return preamble + frame_time;
}
frame_time = DIV_ROUND_UP(frame_length * 8 + 22, rate);
frame_time = frame_time * 4;
if (pkt_type != PK_TYPE_11A)
frame_time += 6;
return 20 + frame_time;
}
/* Get Length, Service, and Signal fields of Phy for Tx */
static void vnt_get_phy_field(struct vnt_private *priv, u32 frame_length,
u16 tx_rate, u8 pkt_type,
@ -202,59 +170,6 @@ static __le16 vnt_rxtx_rsvtime_le16(struct vnt_usb_send_context *context)
rate);
}
static __le16 vnt_get_rtscts_rsvtime_le(struct vnt_private *priv, u8 rsv_type,
u8 pkt_type, u32 frame_length,
u16 current_rate)
{
u32 rrv_time, rts_time, cts_time, ack_time, data_time;
rrv_time = 0;
rts_time = 0;
cts_time = 0;
ack_time = 0;
data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
frame_length, current_rate);
if (rsv_type == 0) {
rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
20, priv->top_cck_basic_rate);
ack_time = vnt_get_frame_time(priv->preamble_type,
pkt_type, 14,
priv->top_cck_basic_rate);
cts_time = ack_time;
} else if (rsv_type == 1) {
rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
20, priv->top_cck_basic_rate);
cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
14, priv->top_cck_basic_rate);
ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
14, priv->top_ofdm_basic_rate);
} else if (rsv_type == 2) {
rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
20, priv->top_ofdm_basic_rate);
ack_time = vnt_get_frame_time(priv->preamble_type,
pkt_type, 14,
priv->top_ofdm_basic_rate);
cts_time = ack_time;
} else if (rsv_type == 3) {
cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
14, priv->top_cck_basic_rate);
ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
14, priv->top_ofdm_basic_rate);
rrv_time = cts_time + ack_time + data_time + 2 * priv->sifs;
return cpu_to_le16((u16)rrv_time);
}
rrv_time = rts_time + cts_time + ack_time + data_time + 3 * priv->sifs;
return cpu_to_le16((u16)rrv_time);
}
static __le16 vnt_get_rts_duration(struct vnt_usb_send_context *context)
{
struct vnt_private *priv = context->priv;
@ -405,18 +320,12 @@ static void vnt_fill_cts_head(struct vnt_usb_send_context *tx_context,
static void vnt_rxtx_rts(struct vnt_usb_send_context *tx_context,
union vnt_tx_head *tx_head, bool need_mic)
{
struct vnt_private *priv = tx_context->priv;
struct vnt_rrv_time_rts *buf = &tx_head->tx_rts.rts;
union vnt_tx_data_head *head = &tx_head->tx_rts.tx.head;
u32 frame_len = tx_context->frame_len;
u16 current_rate = tx_context->tx_rate;
buf->rts_rrv_time_aa = vnt_get_rtscts_rsvtime_le(priv, 2,
tx_context->pkt_type, frame_len, current_rate);
buf->rts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 1,
tx_context->pkt_type, frame_len, current_rate);
buf->rts_rrv_time_bb = vnt_get_rtscts_rsvtime_le(priv, 0,
tx_context->pkt_type, frame_len, current_rate);
buf->rts_rrv_time_aa = vnt_get_rts_duration(tx_context);
buf->rts_rrv_time_ba = buf->rts_rrv_time_aa;
buf->rts_rrv_time_bb = buf->rts_rrv_time_aa;
buf->rrv_time_a = vnt_rxtx_rsvtime_le16(tx_context);
buf->rrv_time_b = buf->rrv_time_a;
@ -430,17 +339,13 @@ static void vnt_rxtx_rts(struct vnt_usb_send_context *tx_context,
static void vnt_rxtx_cts(struct vnt_usb_send_context *tx_context,
union vnt_tx_head *tx_head, bool need_mic)
{
struct vnt_private *priv = tx_context->priv;
struct vnt_rrv_time_cts *buf = &tx_head->tx_cts.cts;
union vnt_tx_data_head *head = &tx_head->tx_cts.tx.head;
u32 frame_len = tx_context->frame_len;
u16 current_rate = tx_context->tx_rate;
buf->rrv_time_a = vnt_rxtx_rsvtime_le16(tx_context);
buf->rrv_time_b = buf->rrv_time_a;
buf->cts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 3,
tx_context->pkt_type, frame_len, current_rate);
buf->cts_rrv_time_ba = vnt_get_cts_duration(tx_context);
if (need_mic)
head = &tx_head->tx_cts.tx.mic.head;
@ -452,11 +357,8 @@ static void vnt_rxtx_ab(struct vnt_usb_send_context *tx_context,
union vnt_tx_head *tx_head,
bool need_rts, bool need_mic)
{
struct vnt_private *priv = tx_context->priv;
struct vnt_rrv_time_ab *buf = &tx_head->tx_ab.ab;
union vnt_tx_data_head *head = &tx_head->tx_ab.tx.head;
u32 frame_len = tx_context->frame_len;
u16 current_rate = tx_context->tx_rate;
buf->rrv_time = vnt_rxtx_rsvtime_le16(tx_context);
@ -464,12 +366,7 @@ static void vnt_rxtx_ab(struct vnt_usb_send_context *tx_context,
head = &tx_head->tx_ab.tx.mic.head;
if (need_rts) {
if (tx_context->pkt_type == PK_TYPE_11B)
buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 0,
tx_context->pkt_type, frame_len, current_rate);
else /* PK_TYPE_11A */
buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 2,
tx_context->pkt_type, frame_len, current_rate);
buf->rts_rrv_time = vnt_get_rts_duration(tx_context);
vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab);