static int fill_ctrlset(struct zd_mac *mac,
struct sk_buff *skb,
struct ieee80211_tx_control *control)
{
int r;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
unsigned int frag_len = skb->len + FCS_LEN;
unsigned int packet_length;
struct zd_ctrlset *cs = (struct zd_ctrlset *)
skb_push(skb, sizeof(struct zd_ctrlset));
ZD_ASSERT(frag_len <= 0xffff);
cs->modulation = control->tx_rate->hw_value;
if (control->flags & IEEE80211_TXCTL_SHORT_PREAMBLE)
cs->modulation = control->tx_rate->hw_value_short;
cs->tx_length = cpu_to_le16(frag_len);
cs_set_control(mac, cs, hdr, control->flags);
packet_length = frag_len + sizeof(struct zd_ctrlset) + 10;
ZD_ASSERT(packet_length <= 0xffff);
/* ZD1211B: Computing the length difference this way, gives us
* flexibility to compute the packet length.
*/
cs->packet_length = cpu_to_le16(zd_chip_is_zd1211b(&mac->chip) ?
packet_length - frag_len : packet_length);
/*
* CURRENT LENGTH:
* - transmit frame length in microseconds
* - seems to be derived from frame length
* - see Cal_Us_Service() in zdinlinef.h
* - if macp->bTxBurstEnable is enabled, then multiply by 4
* - bTxBurstEnable is never set in the vendor driver
*
* SERVICE:
* - "for PLCP configuration"
* - always 0 except in some situations at 802.11b 11M
* - see line 53 of zdinlinef.h
*/
cs->service = 0;
r = zd_calc_tx_length_us(&cs->service, ZD_RATE(cs->modulation),
le16_to_cpu(cs->tx_length));
if (r < 0)
return r;
cs->current_length = cpu_to_le16(r);
cs->next_frame_length = 0;
return 0;
}
static int fill_ctrlset(struct zd_mac *mac,
struct ieee80211_txb *txb,
int frag_num)
{
int r;
struct sk_buff *skb = txb->fragments[frag_num];
struct ieee80211_hdr_4addr *hdr =
(struct ieee80211_hdr_4addr *) skb->data;
unsigned int frag_len = skb->len + IEEE80211_FCS_LEN;
unsigned int next_frag_len;
unsigned int packet_length;
struct zd_ctrlset *cs = (struct zd_ctrlset *)
skb_push(skb, sizeof(struct zd_ctrlset));
if (frag_num+1 < txb->nr_frags) {
next_frag_len = txb->fragments[frag_num+1]->len +
IEEE80211_FCS_LEN;
} else {
next_frag_len = 0;
}
ZD_ASSERT(frag_len <= 0xffff);
ZD_ASSERT(next_frag_len <= 0xffff);
cs_set_modulation(mac, cs, hdr);
cs->tx_length = cpu_to_le16(frag_len);
cs_set_control(mac, cs, hdr);
packet_length = frag_len + sizeof(struct zd_ctrlset) + 10;
ZD_ASSERT(packet_length <= 0xffff);
/* ZD1211B: Computing the length difference this way, gives us
* flexibility to compute the packet length.
*/
cs->packet_length = cpu_to_le16(mac->chip.is_zd1211b ?
packet_length - frag_len : packet_length);
/*
* CURRENT LENGTH:
* - transmit frame length in microseconds
* - seems to be derived from frame length
* - see Cal_Us_Service() in zdinlinef.h
* - if macp->bTxBurstEnable is enabled, then multiply by 4
* - bTxBurstEnable is never set in the vendor driver
*
* SERVICE:
* - "for PLCP configuration"
* - always 0 except in some situations at 802.11b 11M
* - see line 53 of zdinlinef.h
*/
cs->service = 0;
r = zd_calc_tx_length_us(&cs->service, ZD_CS_RATE(cs->modulation),
le16_to_cpu(cs->tx_length));
if (r < 0)
return r;
cs->current_length = cpu_to_le16(r);
if (next_frag_len == 0) {
cs->next_frame_length = 0;
} else {
r = zd_calc_tx_length_us(NULL, ZD_CS_RATE(cs->modulation),
next_frag_len);
if (r < 0)
return r;
cs->next_frame_length = cpu_to_le16(r);
}
return 0;
}
