drivers/net/wireless/broadcom/brcm80211/brcmsmac/ampdu.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/broadcom/brcm80211/brcmsmac/ampdu.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/broadcom/brcm80211/brcmsmac/ampdu.c
Extension
.c
Size
32145 bytes
Lines
1098
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct brcms_fifo_info {
	u16 ampdu_pld_size;
	u8 mcs2ampdu_table[FFPLD_MAX_MCS + 1];
	u16 prev_txfunfl;
	u32 accum_txfunfl;
	u32 accum_txampdu;
	u32 prev_txampdu;
	u32 dmaxferrate;
};

/* AMPDU module specific state
 *
 * wlc: pointer to main wlc structure
 * scb_handle: scb cubby handle to retrieve data from scb
 * ini_enable: per-tid initiator enable/disable of ampdu
 * ba_tx_wsize: Tx ba window size (in pdu)
 * ba_rx_wsize: Rx ba window size (in pdu)
 * retry_limit: mpdu transmit retry limit
 * rr_retry_limit: mpdu transmit retry limit at regular rate
 * retry_limit_tid: per-tid mpdu transmit retry limit
 * rr_retry_limit_tid: per-tid mpdu transmit retry limit at regular rate
 * mpdu_density: min mpdu spacing (0-7) ==> 2^(x-1)/8 usec
 * max_pdu: max pdus allowed in ampdu
 * dur: max duration of an ampdu (in msec)
 * rx_factor: maximum rx ampdu factor (0-3) ==> 2^(13+x) bytes
 * ffpld_rsvd: number of bytes to reserve for preload
 * max_txlen: max size of ampdu per mcs, bw and sgi
 * mfbr: enable multiple fallback rate
 * tx_max_funl: underflows should be kept such that
 *		(tx_max_funfl*underflows) < tx frames
 * fifo_tb: table of fifo infos
 */
struct ampdu_info {
	struct brcms_c_info *wlc;
	int scb_handle;
	u8 ini_enable[AMPDU_MAX_SCB_TID];
	u8 ba_tx_wsize;
	u8 ba_rx_wsize;
	u8 retry_limit;
	u8 rr_retry_limit;
	u8 retry_limit_tid[AMPDU_MAX_SCB_TID];
	u8 rr_retry_limit_tid[AMPDU_MAX_SCB_TID];
	u8 mpdu_density;
	s8 max_pdu;
	u8 dur;
	u8 rx_factor;
	u32 ffpld_rsvd;
	u32 max_txlen[MCS_TABLE_SIZE][2][2];
	bool mfbr;
	u32 tx_max_funl;
	struct brcms_fifo_info fifo_tb[NUM_FFPLD_FIFO];
};

static void brcms_c_scb_ampdu_update_max_txlen(struct ampdu_info *ampdu, u8 dur)
{
	u32 rate, mcs;

	for (mcs = 0; mcs < MCS_TABLE_SIZE; mcs++) {
		/* rate is in Kbps; dur is in msec ==> len = (rate * dur) / 8 */
		/* 20MHz, No SGI */
		rate = mcs_2_rate(mcs, false, false);
		ampdu->max_txlen[mcs][0][0] = (rate * dur) >> 3;
		/* 40 MHz, No SGI */
		rate = mcs_2_rate(mcs, true, false);
		ampdu->max_txlen[mcs][1][0] = (rate * dur) >> 3;
		/* 20MHz, SGI */
		rate = mcs_2_rate(mcs, false, true);
		ampdu->max_txlen[mcs][0][1] = (rate * dur) >> 3;
		/* 40 MHz, SGI */
		rate = mcs_2_rate(mcs, true, true);
		ampdu->max_txlen[mcs][1][1] = (rate * dur) >> 3;
	}
}

static bool brcms_c_ampdu_cap(struct ampdu_info *ampdu)
{
	if (BRCMS_PHY_11N_CAP(ampdu->wlc->band))
		return true;
	else
		return false;
}

static int brcms_c_ampdu_set(struct ampdu_info *ampdu, bool on)
{
	struct brcms_c_info *wlc = ampdu->wlc;
	struct bcma_device *core = wlc->hw->d11core;

	wlc->pub->_ampdu = false;

	if (on) {

Annotation

Implementation Notes