};
#define BRCMF_FWS_HANGER_MAXITEMS 3072
+#define BRCMF_BORROW_RATIO 3
/**
* enum brcmf_fws_hanger_item_state - state of hanger item.
u32 fifo_enqpkt[BRCMF_FWS_FIFO_COUNT];
int fifo_credit[BRCMF_FWS_FIFO_COUNT];
int init_fifo_credit[BRCMF_FWS_FIFO_COUNT];
- int credits_borrowed[BRCMF_FWS_FIFO_AC_VO + 1];
+ int credits_borrowed[BRCMF_FWS_FIFO_AC_VO + 1]
+ [BRCMF_FWS_FIFO_AC_VO + 1];
int deq_node_pos[BRCMF_FWS_FIFO_COUNT];
u32 fifo_credit_map;
u32 fifo_delay_map;
if (!credits)
return;
- fws->fifo_credit_map |= 1 << fifo;
-
- if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
- (fws->credits_borrowed[0])) {
+ if (fifo > BRCMF_FWS_FIFO_AC_BK &&
+ fifo <= BRCMF_FWS_FIFO_AC_VO) {
for (lender_ac = BRCMF_FWS_FIFO_AC_VO; lender_ac >= 0;
lender_ac--) {
- borrowed = &fws->credits_borrowed[lender_ac];
+ borrowed = &fws->credits_borrowed[fifo][lender_ac];
if (*borrowed) {
fws->fifo_credit_map |= (1 << lender_ac);
fifo_credit = &fws->fifo_credit[lender_ac];
}
}
- fws->fifo_credit[fifo] += credits;
+ if (credits) {
+ fws->fifo_credit[fifo] += credits;
+ fws->fifo_credit_map |= 1 << fifo;
+ }
+
if (fws->fifo_credit[fifo] > fws->init_fifo_credit[fifo])
fws->fifo_credit[fifo] = fws->init_fifo_credit[fifo];
}
}
-static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws)
+static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws,
+ int highest_lender_ac, int borrower_ac,
+ bool borrow_all)
{
- int lender_ac;
+ int lender_ac, borrow_limit = 0;
- if (time_after(fws->borrow_defer_timestamp, jiffies)) {
- fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
- return -ENAVAIL;
- }
+ for (lender_ac = 0; lender_ac <= highest_lender_ac; lender_ac++) {
- for (lender_ac = 0; lender_ac <= BRCMF_FWS_FIFO_AC_VO; lender_ac++) {
- if (fws->fifo_credit[lender_ac] > 0) {
- fws->credits_borrowed[lender_ac]++;
+ if (!borrow_all)
+ borrow_limit =
+ fws->init_fifo_credit[lender_ac] / BRCMF_BORROW_RATIO;
+ else
+ borrow_limit = 0;
+
+ if (fws->fifo_credit[lender_ac] > borrow_limit) {
+ fws->credits_borrowed[borrower_ac][lender_ac]++;
fws->fifo_credit[lender_ac]--;
if (fws->fifo_credit[lender_ac] == 0)
fws->fifo_credit_map &= ~(1 << lender_ac);
- fws->fifo_credit_map |= (1 << BRCMF_FWS_FIFO_AC_BE);
+ fws->fifo_credit_map |= (1 << borrower_ac);
brcmf_dbg(DATA, "borrow credit from: %d\n", lender_ac);
return 0;
}
}
- fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
+ fws->fifo_credit_map &= ~(1 << borrower_ac);
return -ENAVAIL;
}
}
continue;
}
- while ((fws->fifo_credit[fifo] > 0) ||
+
+ while ((fws->fifo_credit[fifo]) ||
((!fws->bcmc_credit_check) &&
- (fifo == BRCMF_FWS_FIFO_BCMC))) {
+ (fifo == BRCMF_FWS_FIFO_BCMC))) {
skb = brcmf_fws_deq(fws, fifo);
if (!skb)
break;
if (fws->bus_flow_blocked)
break;
}
- if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
- (fws->fifo_credit[fifo] <= 0) &&
- (!fws->bus_flow_blocked)) {
- while (brcmf_fws_borrow_credit(fws) == 0) {
+
+ if (fifo >= BRCMF_FWS_FIFO_AC_BE &&
+ fifo <= BRCMF_FWS_FIFO_AC_VO &&
+ fws->fifo_credit[fifo] == 0 &&
+ !fws->bus_flow_blocked) {
+ while (brcmf_fws_borrow_credit(fws,
+ fifo - 1, fifo,
+ true) == 0) {
skb = brcmf_fws_deq(fws, fifo);
if (!skb) {
brcmf_fws_return_credits(fws, fifo, 1);