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![Chunfeng Yun](/assets/img/avatar_default.png)
This happens when @udev->reset_resume is set to true, when usb resume,
the flow as below:
- hub_resume
- usb_disable_interface
- usb_disable_endpoint
- usb_hcd_disable_endpoint
- xhci_endpoint_disable // it set @ep->hcpriv to NULL
Then when reset usb device, it will drop allocated endpoints,
the flow as below:
- usb_reset_and_verify_device
- usb_hcd_alloc_bandwidth
- xhci_mtk_drop_ep
but @ep->hcpriv is already set to NULL, the bandwidth will be not
released anymore.
Due to the added endponts are stored in hash table, we can drop the check
of @ep->hcpriv.
Fixes: 4ce186665e
("usb: xhci-mtk: Do not use xhci's virt_dev in drop_endpoint")
Cc: stable <stable@kernel.org>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/20220819080556.32215-2-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
771 lines
19 KiB
C
771 lines
19 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2015 MediaTek Inc.
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* Author:
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* Zhigang.Wei <zhigang.wei@mediatek.com>
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* Chunfeng.Yun <chunfeng.yun@mediatek.com>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include "xhci.h"
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#include "xhci-mtk.h"
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#define SSP_BW_BOUNDARY 130000
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#define SS_BW_BOUNDARY 51000
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/* table 5-5. High-speed Isoc Transaction Limits in usb_20 spec */
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#define HS_BW_BOUNDARY 6144
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/* usb2 spec section11.18.1: at most 188 FS bytes per microframe */
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#define FS_PAYLOAD_MAX 188
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#define DBG_BUF_EN 64
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/* schedule error type */
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#define ESCH_SS_Y6 1001
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#define ESCH_SS_OVERLAP 1002
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#define ESCH_CS_OVERFLOW 1003
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#define ESCH_BW_OVERFLOW 1004
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#define ESCH_FIXME 1005
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/* mtk scheduler bitmasks */
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#define EP_BPKTS(p) ((p) & 0x7f)
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#define EP_BCSCOUNT(p) (((p) & 0x7) << 8)
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#define EP_BBM(p) ((p) << 11)
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#define EP_BOFFSET(p) ((p) & 0x3fff)
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#define EP_BREPEAT(p) (((p) & 0x7fff) << 16)
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static char *sch_error_string(int err_num)
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{
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switch (err_num) {
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case ESCH_SS_Y6:
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return "Can't schedule Start-Split in Y6";
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case ESCH_SS_OVERLAP:
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return "Can't find a suitable Start-Split location";
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case ESCH_CS_OVERFLOW:
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return "The last Complete-Split is greater than 7";
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case ESCH_BW_OVERFLOW:
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return "Bandwidth exceeds the maximum limit";
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case ESCH_FIXME:
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return "FIXME, to be resolved";
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default:
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return "Unknown";
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}
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}
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static int is_fs_or_ls(enum usb_device_speed speed)
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{
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return speed == USB_SPEED_FULL || speed == USB_SPEED_LOW;
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}
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static const char *
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decode_ep(struct usb_host_endpoint *ep, enum usb_device_speed speed)
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{
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static char buf[DBG_BUF_EN];
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struct usb_endpoint_descriptor *epd = &ep->desc;
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unsigned int interval;
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const char *unit;
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interval = usb_decode_interval(epd, speed);
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if (interval % 1000) {
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unit = "us";
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} else {
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unit = "ms";
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interval /= 1000;
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}
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snprintf(buf, DBG_BUF_EN, "%s ep%d%s %s, mpkt:%d, interval:%d/%d%s",
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usb_speed_string(speed), usb_endpoint_num(epd),
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usb_endpoint_dir_in(epd) ? "in" : "out",
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usb_ep_type_string(usb_endpoint_type(epd)),
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usb_endpoint_maxp(epd), epd->bInterval, interval, unit);
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return buf;
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}
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static u32 get_bw_boundary(enum usb_device_speed speed)
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{
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u32 boundary;
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switch (speed) {
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case USB_SPEED_SUPER_PLUS:
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boundary = SSP_BW_BOUNDARY;
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break;
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case USB_SPEED_SUPER:
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boundary = SS_BW_BOUNDARY;
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break;
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default:
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boundary = HS_BW_BOUNDARY;
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break;
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}
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return boundary;
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}
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/*
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* get the bandwidth domain which @ep belongs to.
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*
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* the bandwidth domain array is saved to @sch_array of struct xhci_hcd_mtk,
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* each HS root port is treated as a single bandwidth domain,
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* but each SS root port is treated as two bandwidth domains, one for IN eps,
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* one for OUT eps.
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* @real_port value is defined as follow according to xHCI spec:
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* 1 for SSport0, ..., N+1 for SSportN, N+2 for HSport0, N+3 for HSport1, etc
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* so the bandwidth domain array is organized as follow for simplification:
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* SSport0-OUT, SSport0-IN, ..., SSportX-OUT, SSportX-IN, HSport0, ..., HSportY
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*/
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static struct mu3h_sch_bw_info *
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get_bw_info(struct xhci_hcd_mtk *mtk, struct usb_device *udev,
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struct usb_host_endpoint *ep)
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{
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struct xhci_hcd *xhci = hcd_to_xhci(mtk->hcd);
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struct xhci_virt_device *virt_dev;
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int bw_index;
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virt_dev = xhci->devs[udev->slot_id];
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if (!virt_dev->real_port) {
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WARN_ONCE(1, "%s invalid real_port\n", dev_name(&udev->dev));
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return NULL;
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}
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if (udev->speed >= USB_SPEED_SUPER) {
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if (usb_endpoint_dir_out(&ep->desc))
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bw_index = (virt_dev->real_port - 1) * 2;
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else
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bw_index = (virt_dev->real_port - 1) * 2 + 1;
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} else {
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/* add one more for each SS port */
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bw_index = virt_dev->real_port + xhci->usb3_rhub.num_ports - 1;
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}
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return &mtk->sch_array[bw_index];
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}
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static u32 get_esit(struct xhci_ep_ctx *ep_ctx)
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{
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u32 esit;
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esit = 1 << CTX_TO_EP_INTERVAL(le32_to_cpu(ep_ctx->ep_info));
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if (esit > XHCI_MTK_MAX_ESIT)
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esit = XHCI_MTK_MAX_ESIT;
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return esit;
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}
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static struct mu3h_sch_tt *find_tt(struct usb_device *udev)
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{
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struct usb_tt *utt = udev->tt;
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struct mu3h_sch_tt *tt, **tt_index, **ptt;
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bool allocated_index = false;
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if (!utt)
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return NULL; /* Not below a TT */
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/*
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* Find/create our data structure.
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* For hubs with a single TT, we get it directly.
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* For hubs with multiple TTs, there's an extra level of pointers.
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*/
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tt_index = NULL;
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if (utt->multi) {
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tt_index = utt->hcpriv;
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if (!tt_index) { /* Create the index array */
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tt_index = kcalloc(utt->hub->maxchild,
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sizeof(*tt_index), GFP_KERNEL);
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if (!tt_index)
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return ERR_PTR(-ENOMEM);
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utt->hcpriv = tt_index;
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allocated_index = true;
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}
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ptt = &tt_index[udev->ttport - 1];
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} else {
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ptt = (struct mu3h_sch_tt **) &utt->hcpriv;
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}
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tt = *ptt;
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if (!tt) { /* Create the mu3h_sch_tt */
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tt = kzalloc(sizeof(*tt), GFP_KERNEL);
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if (!tt) {
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if (allocated_index) {
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utt->hcpriv = NULL;
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kfree(tt_index);
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}
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return ERR_PTR(-ENOMEM);
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}
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INIT_LIST_HEAD(&tt->ep_list);
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*ptt = tt;
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}
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return tt;
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}
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/* Release the TT above udev, if it's not in use */
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static void drop_tt(struct usb_device *udev)
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{
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struct usb_tt *utt = udev->tt;
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struct mu3h_sch_tt *tt, **tt_index, **ptt;
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int i, cnt;
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if (!utt || !utt->hcpriv)
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return; /* Not below a TT, or never allocated */
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cnt = 0;
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if (utt->multi) {
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tt_index = utt->hcpriv;
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ptt = &tt_index[udev->ttport - 1];
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/* How many entries are left in tt_index? */
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for (i = 0; i < utt->hub->maxchild; ++i)
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cnt += !!tt_index[i];
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} else {
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tt_index = NULL;
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ptt = (struct mu3h_sch_tt **)&utt->hcpriv;
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}
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tt = *ptt;
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if (!tt || !list_empty(&tt->ep_list))
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return; /* never allocated , or still in use*/
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*ptt = NULL;
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kfree(tt);
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if (cnt == 1) {
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utt->hcpriv = NULL;
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kfree(tt_index);
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}
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}
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static struct mu3h_sch_ep_info *
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create_sch_ep(struct xhci_hcd_mtk *mtk, struct usb_device *udev,
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struct usb_host_endpoint *ep)
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{
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struct mu3h_sch_ep_info *sch_ep;
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struct mu3h_sch_bw_info *bw_info;
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struct mu3h_sch_tt *tt = NULL;
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bw_info = get_bw_info(mtk, udev, ep);
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if (!bw_info)
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return ERR_PTR(-ENODEV);
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sch_ep = kzalloc(sizeof(*sch_ep), GFP_KERNEL);
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if (!sch_ep)
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return ERR_PTR(-ENOMEM);
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if (is_fs_or_ls(udev->speed)) {
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tt = find_tt(udev);
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if (IS_ERR(tt)) {
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kfree(sch_ep);
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return ERR_PTR(-ENOMEM);
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}
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}
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sch_ep->bw_info = bw_info;
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sch_ep->sch_tt = tt;
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sch_ep->ep = ep;
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sch_ep->speed = udev->speed;
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INIT_LIST_HEAD(&sch_ep->endpoint);
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INIT_LIST_HEAD(&sch_ep->tt_endpoint);
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INIT_HLIST_NODE(&sch_ep->hentry);
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return sch_ep;
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}
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static void setup_sch_info(struct xhci_ep_ctx *ep_ctx,
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struct mu3h_sch_ep_info *sch_ep)
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{
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u32 ep_type;
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u32 maxpkt;
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u32 max_burst;
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u32 mult;
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u32 esit_pkts;
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u32 max_esit_payload;
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ep_type = CTX_TO_EP_TYPE(le32_to_cpu(ep_ctx->ep_info2));
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maxpkt = MAX_PACKET_DECODED(le32_to_cpu(ep_ctx->ep_info2));
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max_burst = CTX_TO_MAX_BURST(le32_to_cpu(ep_ctx->ep_info2));
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mult = CTX_TO_EP_MULT(le32_to_cpu(ep_ctx->ep_info));
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max_esit_payload =
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(CTX_TO_MAX_ESIT_PAYLOAD_HI(
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le32_to_cpu(ep_ctx->ep_info)) << 16) |
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CTX_TO_MAX_ESIT_PAYLOAD(le32_to_cpu(ep_ctx->tx_info));
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sch_ep->esit = get_esit(ep_ctx);
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sch_ep->num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;
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sch_ep->ep_type = ep_type;
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sch_ep->maxpkt = maxpkt;
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sch_ep->offset = 0;
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sch_ep->burst_mode = 0;
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sch_ep->repeat = 0;
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if (sch_ep->speed == USB_SPEED_HIGH) {
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sch_ep->cs_count = 0;
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/*
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* usb_20 spec section5.9
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* a single microframe is enough for HS synchromous endpoints
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* in a interval
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*/
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sch_ep->num_budget_microframes = 1;
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/*
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* xHCI spec section6.2.3.4
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* @max_burst is the number of additional transactions
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* opportunities per microframe
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*/
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sch_ep->pkts = max_burst + 1;
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sch_ep->bw_cost_per_microframe = maxpkt * sch_ep->pkts;
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} else if (sch_ep->speed >= USB_SPEED_SUPER) {
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/* usb3_r1 spec section4.4.7 & 4.4.8 */
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sch_ep->cs_count = 0;
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sch_ep->burst_mode = 1;
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/*
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* some device's (d)wBytesPerInterval is set as 0,
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* then max_esit_payload is 0, so evaluate esit_pkts from
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* mult and burst
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*/
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esit_pkts = DIV_ROUND_UP(max_esit_payload, maxpkt);
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if (esit_pkts == 0)
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esit_pkts = (mult + 1) * (max_burst + 1);
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if (ep_type == INT_IN_EP || ep_type == INT_OUT_EP) {
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sch_ep->pkts = esit_pkts;
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sch_ep->num_budget_microframes = 1;
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}
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if (ep_type == ISOC_IN_EP || ep_type == ISOC_OUT_EP) {
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if (sch_ep->esit == 1)
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sch_ep->pkts = esit_pkts;
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else if (esit_pkts <= sch_ep->esit)
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sch_ep->pkts = 1;
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else
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sch_ep->pkts = roundup_pow_of_two(esit_pkts)
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/ sch_ep->esit;
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sch_ep->num_budget_microframes =
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DIV_ROUND_UP(esit_pkts, sch_ep->pkts);
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sch_ep->repeat = !!(sch_ep->num_budget_microframes > 1);
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}
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sch_ep->bw_cost_per_microframe = maxpkt * sch_ep->pkts;
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} else if (is_fs_or_ls(sch_ep->speed)) {
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sch_ep->pkts = 1; /* at most one packet for each microframe */
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/*
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* num_budget_microframes and cs_count will be updated when
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* check TT for INT_OUT_EP, ISOC/INT_IN_EP type
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*/
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sch_ep->cs_count = DIV_ROUND_UP(maxpkt, FS_PAYLOAD_MAX);
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sch_ep->num_budget_microframes = sch_ep->cs_count;
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sch_ep->bw_cost_per_microframe = min_t(u32, maxpkt, FS_PAYLOAD_MAX);
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}
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}
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/* Get maximum bandwidth when we schedule at offset slot. */
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static u32 get_max_bw(struct mu3h_sch_bw_info *sch_bw,
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struct mu3h_sch_ep_info *sch_ep, u32 offset)
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{
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u32 max_bw = 0;
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u32 bw;
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int i, j, k;
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for (i = 0; i < sch_ep->num_esit; i++) {
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u32 base = offset + i * sch_ep->esit;
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for (j = 0; j < sch_ep->num_budget_microframes; j++) {
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k = XHCI_MTK_BW_INDEX(base + j);
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bw = sch_bw->bus_bw[k] + sch_ep->bw_cost_per_microframe;
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if (bw > max_bw)
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max_bw = bw;
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}
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}
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return max_bw;
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}
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static void update_bus_bw(struct mu3h_sch_bw_info *sch_bw,
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struct mu3h_sch_ep_info *sch_ep, bool used)
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{
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int bw_updated;
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u32 base;
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int i, j;
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bw_updated = sch_ep->bw_cost_per_microframe * (used ? 1 : -1);
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for (i = 0; i < sch_ep->num_esit; i++) {
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base = sch_ep->offset + i * sch_ep->esit;
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for (j = 0; j < sch_ep->num_budget_microframes; j++)
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sch_bw->bus_bw[XHCI_MTK_BW_INDEX(base + j)] += bw_updated;
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}
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}
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static int check_fs_bus_bw(struct mu3h_sch_ep_info *sch_ep, int offset)
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{
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struct mu3h_sch_tt *tt = sch_ep->sch_tt;
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u32 tmp;
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int base;
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int i, j, k;
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for (i = 0; i < sch_ep->num_esit; i++) {
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base = offset + i * sch_ep->esit;
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/*
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* Compared with hs bus, no matter what ep type,
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* the hub will always delay one uframe to send data
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*/
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for (j = 0; j < sch_ep->num_budget_microframes; j++) {
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k = XHCI_MTK_BW_INDEX(base + j);
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tmp = tt->fs_bus_bw[k] + sch_ep->bw_cost_per_microframe;
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if (tmp > FS_PAYLOAD_MAX)
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return -ESCH_BW_OVERFLOW;
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}
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}
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return 0;
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}
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static int check_sch_tt(struct mu3h_sch_ep_info *sch_ep, u32 offset)
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{
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u32 start_ss, last_ss;
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u32 start_cs, last_cs;
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if (!sch_ep->sch_tt)
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return 0;
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start_ss = offset % 8;
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if (sch_ep->ep_type == ISOC_OUT_EP) {
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last_ss = start_ss + sch_ep->cs_count - 1;
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/*
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* usb_20 spec section11.18:
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* must never schedule Start-Split in Y6
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*/
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if (!(start_ss == 7 || last_ss < 6))
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return -ESCH_SS_Y6;
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} else {
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u32 cs_count = DIV_ROUND_UP(sch_ep->maxpkt, FS_PAYLOAD_MAX);
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/*
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* usb_20 spec section11.18:
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* must never schedule Start-Split in Y6
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*/
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if (start_ss == 6)
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return -ESCH_SS_Y6;
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/* one uframe for ss + one uframe for idle */
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start_cs = (start_ss + 2) % 8;
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last_cs = start_cs + cs_count - 1;
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if (last_cs > 7)
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return -ESCH_CS_OVERFLOW;
|
|
|
|
if (cs_count > 7)
|
|
cs_count = 7; /* HW limit */
|
|
|
|
sch_ep->cs_count = cs_count;
|
|
/* ss, idle are ignored */
|
|
sch_ep->num_budget_microframes = cs_count;
|
|
|
|
/*
|
|
* if interval=1, maxp >752, num_budge_micoframe is larger
|
|
* than sch_ep->esit, will overstep boundary
|
|
*/
|
|
if (sch_ep->num_budget_microframes > sch_ep->esit)
|
|
sch_ep->num_budget_microframes = sch_ep->esit;
|
|
}
|
|
|
|
return check_fs_bus_bw(sch_ep, offset);
|
|
}
|
|
|
|
static void update_sch_tt(struct mu3h_sch_ep_info *sch_ep, bool used)
|
|
{
|
|
struct mu3h_sch_tt *tt = sch_ep->sch_tt;
|
|
int bw_updated;
|
|
u32 base;
|
|
int i, j;
|
|
|
|
bw_updated = sch_ep->bw_cost_per_microframe * (used ? 1 : -1);
|
|
|
|
for (i = 0; i < sch_ep->num_esit; i++) {
|
|
base = sch_ep->offset + i * sch_ep->esit;
|
|
|
|
for (j = 0; j < sch_ep->num_budget_microframes; j++)
|
|
tt->fs_bus_bw[XHCI_MTK_BW_INDEX(base + j)] += bw_updated;
|
|
}
|
|
|
|
if (used)
|
|
list_add_tail(&sch_ep->tt_endpoint, &tt->ep_list);
|
|
else
|
|
list_del(&sch_ep->tt_endpoint);
|
|
}
|
|
|
|
static int load_ep_bw(struct mu3h_sch_bw_info *sch_bw,
|
|
struct mu3h_sch_ep_info *sch_ep, bool loaded)
|
|
{
|
|
if (sch_ep->sch_tt)
|
|
update_sch_tt(sch_ep, loaded);
|
|
|
|
/* update bus bandwidth info */
|
|
update_bus_bw(sch_bw, sch_ep, loaded);
|
|
sch_ep->allocated = loaded;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int check_sch_bw(struct mu3h_sch_ep_info *sch_ep)
|
|
{
|
|
struct mu3h_sch_bw_info *sch_bw = sch_ep->bw_info;
|
|
const u32 bw_boundary = get_bw_boundary(sch_ep->speed);
|
|
u32 offset;
|
|
u32 worst_bw;
|
|
u32 min_bw = ~0;
|
|
int min_index = -1;
|
|
int ret = 0;
|
|
|
|
/*
|
|
* Search through all possible schedule microframes.
|
|
* and find a microframe where its worst bandwidth is minimum.
|
|
*/
|
|
for (offset = 0; offset < sch_ep->esit; offset++) {
|
|
ret = check_sch_tt(sch_ep, offset);
|
|
if (ret)
|
|
continue;
|
|
|
|
worst_bw = get_max_bw(sch_bw, sch_ep, offset);
|
|
if (worst_bw > bw_boundary)
|
|
continue;
|
|
|
|
if (min_bw > worst_bw) {
|
|
min_bw = worst_bw;
|
|
min_index = offset;
|
|
}
|
|
|
|
/* use first-fit for LS/FS */
|
|
if (sch_ep->sch_tt && min_index >= 0)
|
|
break;
|
|
|
|
if (min_bw == 0)
|
|
break;
|
|
}
|
|
|
|
if (min_index < 0)
|
|
return ret ? ret : -ESCH_BW_OVERFLOW;
|
|
|
|
sch_ep->offset = min_index;
|
|
|
|
return load_ep_bw(sch_bw, sch_ep, true);
|
|
}
|
|
|
|
static void destroy_sch_ep(struct xhci_hcd_mtk *mtk, struct usb_device *udev,
|
|
struct mu3h_sch_ep_info *sch_ep)
|
|
{
|
|
/* only release ep bw check passed by check_sch_bw() */
|
|
if (sch_ep->allocated)
|
|
load_ep_bw(sch_ep->bw_info, sch_ep, false);
|
|
|
|
if (sch_ep->sch_tt)
|
|
drop_tt(udev);
|
|
|
|
list_del(&sch_ep->endpoint);
|
|
hlist_del(&sch_ep->hentry);
|
|
kfree(sch_ep);
|
|
}
|
|
|
|
static bool need_bw_sch(struct usb_device *udev,
|
|
struct usb_host_endpoint *ep)
|
|
{
|
|
bool has_tt = udev->tt && udev->tt->hub->parent;
|
|
|
|
/* only for periodic endpoints */
|
|
if (usb_endpoint_xfer_control(&ep->desc)
|
|
|| usb_endpoint_xfer_bulk(&ep->desc))
|
|
return false;
|
|
|
|
/*
|
|
* for LS & FS periodic endpoints which its device is not behind
|
|
* a TT are also ignored, root-hub will schedule them directly,
|
|
* but need set @bpkts field of endpoint context to 1.
|
|
*/
|
|
if (is_fs_or_ls(udev->speed) && !has_tt)
|
|
return false;
|
|
|
|
/* skip endpoint with zero maxpkt */
|
|
if (usb_endpoint_maxp(&ep->desc) == 0)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
int xhci_mtk_sch_init(struct xhci_hcd_mtk *mtk)
|
|
{
|
|
struct xhci_hcd *xhci = hcd_to_xhci(mtk->hcd);
|
|
struct mu3h_sch_bw_info *sch_array;
|
|
int num_usb_bus;
|
|
|
|
/* ss IN and OUT are separated */
|
|
num_usb_bus = xhci->usb3_rhub.num_ports * 2 + xhci->usb2_rhub.num_ports;
|
|
|
|
sch_array = kcalloc(num_usb_bus, sizeof(*sch_array), GFP_KERNEL);
|
|
if (sch_array == NULL)
|
|
return -ENOMEM;
|
|
|
|
mtk->sch_array = sch_array;
|
|
|
|
INIT_LIST_HEAD(&mtk->bw_ep_chk_list);
|
|
hash_init(mtk->sch_ep_hash);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void xhci_mtk_sch_exit(struct xhci_hcd_mtk *mtk)
|
|
{
|
|
kfree(mtk->sch_array);
|
|
}
|
|
|
|
static int add_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev,
|
|
struct usb_host_endpoint *ep)
|
|
{
|
|
struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
|
|
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
|
|
struct xhci_ep_ctx *ep_ctx;
|
|
struct xhci_virt_device *virt_dev;
|
|
struct mu3h_sch_ep_info *sch_ep;
|
|
unsigned int ep_index;
|
|
|
|
virt_dev = xhci->devs[udev->slot_id];
|
|
ep_index = xhci_get_endpoint_index(&ep->desc);
|
|
ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index);
|
|
|
|
if (!need_bw_sch(udev, ep)) {
|
|
/*
|
|
* set @bpkts to 1 if it is LS or FS periodic endpoint, and its
|
|
* device does not connected through an external HS hub
|
|
*/
|
|
if (usb_endpoint_xfer_int(&ep->desc)
|
|
|| usb_endpoint_xfer_isoc(&ep->desc))
|
|
ep_ctx->reserved[0] = cpu_to_le32(EP_BPKTS(1));
|
|
|
|
return 0;
|
|
}
|
|
|
|
xhci_dbg(xhci, "%s %s\n", __func__, decode_ep(ep, udev->speed));
|
|
|
|
sch_ep = create_sch_ep(mtk, udev, ep);
|
|
if (IS_ERR_OR_NULL(sch_ep))
|
|
return -ENOMEM;
|
|
|
|
setup_sch_info(ep_ctx, sch_ep);
|
|
|
|
list_add_tail(&sch_ep->endpoint, &mtk->bw_ep_chk_list);
|
|
hash_add(mtk->sch_ep_hash, &sch_ep->hentry, (unsigned long)ep);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void drop_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev,
|
|
struct usb_host_endpoint *ep)
|
|
{
|
|
struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
|
|
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
|
|
struct mu3h_sch_ep_info *sch_ep;
|
|
struct hlist_node *hn;
|
|
|
|
if (!need_bw_sch(udev, ep))
|
|
return;
|
|
|
|
xhci_dbg(xhci, "%s %s\n", __func__, decode_ep(ep, udev->speed));
|
|
|
|
hash_for_each_possible_safe(mtk->sch_ep_hash, sch_ep,
|
|
hn, hentry, (unsigned long)ep) {
|
|
if (sch_ep->ep == ep) {
|
|
destroy_sch_ep(mtk, udev, sch_ep);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
int xhci_mtk_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
|
|
{
|
|
struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
|
|
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
|
|
struct xhci_virt_device *virt_dev = xhci->devs[udev->slot_id];
|
|
struct mu3h_sch_ep_info *sch_ep;
|
|
int ret;
|
|
|
|
xhci_dbg(xhci, "%s() udev %s\n", __func__, dev_name(&udev->dev));
|
|
|
|
list_for_each_entry(sch_ep, &mtk->bw_ep_chk_list, endpoint) {
|
|
struct xhci_ep_ctx *ep_ctx;
|
|
struct usb_host_endpoint *ep = sch_ep->ep;
|
|
unsigned int ep_index = xhci_get_endpoint_index(&ep->desc);
|
|
|
|
ret = check_sch_bw(sch_ep);
|
|
if (ret) {
|
|
xhci_err(xhci, "Not enough bandwidth! (%s)\n",
|
|
sch_error_string(-ret));
|
|
return -ENOSPC;
|
|
}
|
|
|
|
ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index);
|
|
ep_ctx->reserved[0] = cpu_to_le32(EP_BPKTS(sch_ep->pkts)
|
|
| EP_BCSCOUNT(sch_ep->cs_count)
|
|
| EP_BBM(sch_ep->burst_mode));
|
|
ep_ctx->reserved[1] = cpu_to_le32(EP_BOFFSET(sch_ep->offset)
|
|
| EP_BREPEAT(sch_ep->repeat));
|
|
|
|
xhci_dbg(xhci, " PKTS:%x, CSCOUNT:%x, BM:%x, OFFSET:%x, REPEAT:%x\n",
|
|
sch_ep->pkts, sch_ep->cs_count, sch_ep->burst_mode,
|
|
sch_ep->offset, sch_ep->repeat);
|
|
}
|
|
|
|
ret = xhci_check_bandwidth(hcd, udev);
|
|
if (!ret)
|
|
list_del_init(&mtk->bw_ep_chk_list);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void xhci_mtk_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
|
|
{
|
|
struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
|
|
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
|
|
struct mu3h_sch_ep_info *sch_ep, *tmp;
|
|
|
|
xhci_dbg(xhci, "%s() udev %s\n", __func__, dev_name(&udev->dev));
|
|
|
|
list_for_each_entry_safe(sch_ep, tmp, &mtk->bw_ep_chk_list, endpoint)
|
|
destroy_sch_ep(mtk, udev, sch_ep);
|
|
|
|
xhci_reset_bandwidth(hcd, udev);
|
|
}
|
|
|
|
int xhci_mtk_add_ep(struct usb_hcd *hcd, struct usb_device *udev,
|
|
struct usb_host_endpoint *ep)
|
|
{
|
|
int ret;
|
|
|
|
ret = xhci_add_endpoint(hcd, udev, ep);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (ep->hcpriv)
|
|
ret = add_ep_quirk(hcd, udev, ep);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int xhci_mtk_drop_ep(struct usb_hcd *hcd, struct usb_device *udev,
|
|
struct usb_host_endpoint *ep)
|
|
{
|
|
int ret;
|
|
|
|
ret = xhci_drop_endpoint(hcd, udev, ep);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* needn't check @ep->hcpriv, xhci_endpoint_disable set it NULL */
|
|
drop_ep_quirk(hcd, udev, ep);
|
|
|
|
return 0;
|
|
}
|