linux-kernel - [PATCH 08/11] usb: xhci-mtk: update fs bus bandwidth by bw_budget

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Message-ID: <1627635002-24521-8-git-send-email-chunfeng.yun@mediatek.com>
Date:   Fri, 30 Jul 2021 16:49:59 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Mathias Nyman <mathias.nyman@...el.com>
CC:     Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <linux-usb@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Eddie Hung <eddie.hung@...iatek.com>
Subject: [PATCH 08/11] usb: xhci-mtk: update fs bus bandwidth by bw_budget_table

Use @bw_budget_table[] to update fs bus bandwidth due to
not all microframes consume @bw_cost_per_microframe, see
setup_sch_info().

Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
---
 drivers/usb/host/xhci-mtk-sch.c | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c
index 0bb1a6295d64..10c0f0f6461f 100644
--- a/drivers/usb/host/xhci-mtk-sch.c
+++ b/drivers/usb/host/xhci-mtk-sch.c
@@ -458,8 +458,8 @@ static int check_fs_bus_bw(struct mu3h_sch_ep_info *sch_ep, int offset)
 		 * Compared with hs bus, no matter what ep type,
 		 * the hub will always delay one uframe to send data
 		 */
-		for (j = 0; j < sch_ep->cs_count; j++) {
-			tmp = tt->fs_bus_bw[base + j] + sch_ep->bw_cost_per_microframe;
+		for (j = 0; j < sch_ep->num_budget_microframes; j++) {
+			tmp = tt->fs_bus_bw[base + j] + sch_ep->bw_budget_table[j];
 			if (tmp > FS_PAYLOAD_MAX)
 				return -ESCH_BW_OVERFLOW;
 		}
@@ -534,21 +534,18 @@ static void update_sch_tt(struct mu3h_sch_ep_info *sch_ep, bool used)
 {
 	struct mu3h_sch_tt *tt = sch_ep->sch_tt;
 	u32 base, num_esit;
-	int bw_updated;
 	int i, j;
 
 	num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;
 
-	if (used)
-		bw_updated = sch_ep->bw_cost_per_microframe;
-	else
-		bw_updated = -sch_ep->bw_cost_per_microframe;
-
 	for (i = 0; i < num_esit; i++) {
 		base = sch_ep->offset + i * sch_ep->esit;
 
-		for (j = 0; j < sch_ep->cs_count; j++)
-			tt->fs_bus_bw[base + j] += bw_updated;
+		for (j = 0; j < sch_ep->num_budget_microframes; j++)
+			if (used)
+				tt->fs_bus_bw[base + j] += sch_ep->bw_budget_table[j];
+			else
+				tt->fs_bus_bw[base + j] -= sch_ep->bw_budget_table[j];
 	}
 
 	if (used)
-- 
2.18.0