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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/usb/host/xhci-mtk-sch.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/usb/host/xhci-mtk-sch.c')
-rw-r--r-- | drivers/usb/host/xhci-mtk-sch.c | 771 |
1 files changed, 771 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c new file mode 100644 index 000000000..579899eb2 --- /dev/null +++ b/drivers/usb/host/xhci-mtk-sch.c @@ -0,0 +1,771 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2015 MediaTek Inc. + * Author: + * Zhigang.Wei <zhigang.wei@mediatek.com> + * Chunfeng.Yun <chunfeng.yun@mediatek.com> + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> + +#include "xhci.h" +#include "xhci-mtk.h" + +#define SSP_BW_BOUNDARY 130000 +#define SS_BW_BOUNDARY 51000 +/* table 5-5. High-speed Isoc Transaction Limits in usb_20 spec */ +#define HS_BW_BOUNDARY 6144 +/* usb2 spec section11.18.1: at most 188 FS bytes per microframe */ +#define FS_PAYLOAD_MAX 188 + +#define DBG_BUF_EN 64 + +/* schedule error type */ +#define ESCH_SS_Y6 1001 +#define ESCH_SS_OVERLAP 1002 +#define ESCH_CS_OVERFLOW 1003 +#define ESCH_BW_OVERFLOW 1004 +#define ESCH_FIXME 1005 + +/* mtk scheduler bitmasks */ +#define EP_BPKTS(p) ((p) & 0x7f) +#define EP_BCSCOUNT(p) (((p) & 0x7) << 8) +#define EP_BBM(p) ((p) << 11) +#define EP_BOFFSET(p) ((p) & 0x3fff) +#define EP_BREPEAT(p) (((p) & 0x7fff) << 16) + +static char *sch_error_string(int err_num) +{ + switch (err_num) { + case ESCH_SS_Y6: + return "Can't schedule Start-Split in Y6"; + case ESCH_SS_OVERLAP: + return "Can't find a suitable Start-Split location"; + case ESCH_CS_OVERFLOW: + return "The last Complete-Split is greater than 7"; + case ESCH_BW_OVERFLOW: + return "Bandwidth exceeds the maximum limit"; + case ESCH_FIXME: + return "FIXME, to be resolved"; + default: + return "Unknown"; + } +} + +static int is_fs_or_ls(enum usb_device_speed speed) +{ + return speed == USB_SPEED_FULL || speed == USB_SPEED_LOW; +} + +static const char * +decode_ep(struct usb_host_endpoint *ep, enum usb_device_speed speed) +{ + static char buf[DBG_BUF_EN]; + struct usb_endpoint_descriptor *epd = &ep->desc; + unsigned int interval; + const char *unit; + + interval = usb_decode_interval(epd, speed); + if (interval % 1000) { + unit = "us"; + } else { + unit = "ms"; + interval /= 1000; + } + + snprintf(buf, DBG_BUF_EN, "%s ep%d%s %s, mpkt:%d, interval:%d/%d%s", + usb_speed_string(speed), usb_endpoint_num(epd), + usb_endpoint_dir_in(epd) ? "in" : "out", + usb_ep_type_string(usb_endpoint_type(epd)), + usb_endpoint_maxp(epd), epd->bInterval, interval, unit); + + return buf; +} + +static u32 get_bw_boundary(enum usb_device_speed speed) +{ + u32 boundary; + + switch (speed) { + case USB_SPEED_SUPER_PLUS: + boundary = SSP_BW_BOUNDARY; + break; + case USB_SPEED_SUPER: + boundary = SS_BW_BOUNDARY; + break; + default: + boundary = HS_BW_BOUNDARY; + break; + } + + return boundary; +} + +/* +* get the bandwidth domain which @ep belongs to. +* +* the bandwidth domain array is saved to @sch_array of struct xhci_hcd_mtk, +* each HS root port is treated as a single bandwidth domain, +* but each SS root port is treated as two bandwidth domains, one for IN eps, +* one for OUT eps. +* @real_port value is defined as follow according to xHCI spec: +* 1 for SSport0, ..., N+1 for SSportN, N+2 for HSport0, N+3 for HSport1, etc +* so the bandwidth domain array is organized as follow for simplification: +* SSport0-OUT, SSport0-IN, ..., SSportX-OUT, SSportX-IN, HSport0, ..., HSportY +*/ +static struct mu3h_sch_bw_info * +get_bw_info(struct xhci_hcd_mtk *mtk, struct usb_device *udev, + struct usb_host_endpoint *ep) +{ + struct xhci_hcd *xhci = hcd_to_xhci(mtk->hcd); + struct xhci_virt_device *virt_dev; + int bw_index; + + virt_dev = xhci->devs[udev->slot_id]; + if (!virt_dev->real_port) { + WARN_ONCE(1, "%s invalid real_port\n", dev_name(&udev->dev)); + return NULL; + } + + if (udev->speed >= USB_SPEED_SUPER) { + if (usb_endpoint_dir_out(&ep->desc)) + bw_index = (virt_dev->real_port - 1) * 2; + else + bw_index = (virt_dev->real_port - 1) * 2 + 1; + } else { + /* add one more for each SS port */ + bw_index = virt_dev->real_port + xhci->usb3_rhub.num_ports - 1; + } + + return &mtk->sch_array[bw_index]; +} + +static u32 get_esit(struct xhci_ep_ctx *ep_ctx) +{ + u32 esit; + + esit = 1 << CTX_TO_EP_INTERVAL(le32_to_cpu(ep_ctx->ep_info)); + if (esit > XHCI_MTK_MAX_ESIT) + esit = XHCI_MTK_MAX_ESIT; + + return esit; +} + +static struct mu3h_sch_tt *find_tt(struct usb_device *udev) +{ + struct usb_tt *utt = udev->tt; + struct mu3h_sch_tt *tt, **tt_index, **ptt; + bool allocated_index = false; + + if (!utt) + return NULL; /* Not below a TT */ + + /* + * Find/create our data structure. + * For hubs with a single TT, we get it directly. + * For hubs with multiple TTs, there's an extra level of pointers. + */ + tt_index = NULL; + if (utt->multi) { + tt_index = utt->hcpriv; + if (!tt_index) { /* Create the index array */ + tt_index = kcalloc(utt->hub->maxchild, + sizeof(*tt_index), GFP_KERNEL); + if (!tt_index) + return ERR_PTR(-ENOMEM); + utt->hcpriv = tt_index; + allocated_index = true; + } + ptt = &tt_index[udev->ttport - 1]; + } else { + ptt = (struct mu3h_sch_tt **) &utt->hcpriv; + } + + tt = *ptt; + if (!tt) { /* Create the mu3h_sch_tt */ + tt = kzalloc(sizeof(*tt), GFP_KERNEL); + if (!tt) { + if (allocated_index) { + utt->hcpriv = NULL; + kfree(tt_index); + } + return ERR_PTR(-ENOMEM); + } + INIT_LIST_HEAD(&tt->ep_list); + *ptt = tt; + } + + return tt; +} + +/* Release the TT above udev, if it's not in use */ +static void drop_tt(struct usb_device *udev) +{ + struct usb_tt *utt = udev->tt; + struct mu3h_sch_tt *tt, **tt_index, **ptt; + int i, cnt; + + if (!utt || !utt->hcpriv) + return; /* Not below a TT, or never allocated */ + + cnt = 0; + if (utt->multi) { + tt_index = utt->hcpriv; + ptt = &tt_index[udev->ttport - 1]; + /* How many entries are left in tt_index? */ + for (i = 0; i < utt->hub->maxchild; ++i) + cnt += !!tt_index[i]; + } else { + tt_index = NULL; + ptt = (struct mu3h_sch_tt **)&utt->hcpriv; + } + + tt = *ptt; + if (!tt || !list_empty(&tt->ep_list)) + return; /* never allocated , or still in use*/ + + *ptt = NULL; + kfree(tt); + + if (cnt == 1) { + utt->hcpriv = NULL; + kfree(tt_index); + } +} + +static struct mu3h_sch_ep_info * +create_sch_ep(struct xhci_hcd_mtk *mtk, struct usb_device *udev, + struct usb_host_endpoint *ep) +{ + struct mu3h_sch_ep_info *sch_ep; + struct mu3h_sch_bw_info *bw_info; + struct mu3h_sch_tt *tt = NULL; + + bw_info = get_bw_info(mtk, udev, ep); + if (!bw_info) + return ERR_PTR(-ENODEV); + + sch_ep = kzalloc(sizeof(*sch_ep), GFP_KERNEL); + if (!sch_ep) + return ERR_PTR(-ENOMEM); + + if (is_fs_or_ls(udev->speed)) { + tt = find_tt(udev); + if (IS_ERR(tt)) { + kfree(sch_ep); + return ERR_PTR(-ENOMEM); + } + } + + sch_ep->bw_info = bw_info; + sch_ep->sch_tt = tt; + sch_ep->ep = ep; + sch_ep->speed = udev->speed; + INIT_LIST_HEAD(&sch_ep->endpoint); + INIT_LIST_HEAD(&sch_ep->tt_endpoint); + INIT_HLIST_NODE(&sch_ep->hentry); + + return sch_ep; +} + +static void setup_sch_info(struct xhci_ep_ctx *ep_ctx, + struct mu3h_sch_ep_info *sch_ep) +{ + u32 ep_type; + u32 maxpkt; + u32 max_burst; + u32 mult; + u32 esit_pkts; + u32 max_esit_payload; + + ep_type = CTX_TO_EP_TYPE(le32_to_cpu(ep_ctx->ep_info2)); + maxpkt = MAX_PACKET_DECODED(le32_to_cpu(ep_ctx->ep_info2)); + max_burst = CTX_TO_MAX_BURST(le32_to_cpu(ep_ctx->ep_info2)); + mult = CTX_TO_EP_MULT(le32_to_cpu(ep_ctx->ep_info)); + max_esit_payload = + (CTX_TO_MAX_ESIT_PAYLOAD_HI( + le32_to_cpu(ep_ctx->ep_info)) << 16) | + CTX_TO_MAX_ESIT_PAYLOAD(le32_to_cpu(ep_ctx->tx_info)); + + sch_ep->esit = get_esit(ep_ctx); + sch_ep->num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit; + sch_ep->ep_type = ep_type; + sch_ep->maxpkt = maxpkt; + sch_ep->offset = 0; + sch_ep->burst_mode = 0; + sch_ep->repeat = 0; + + if (sch_ep->speed == USB_SPEED_HIGH) { + sch_ep->cs_count = 0; + + /* + * usb_20 spec section5.9 + * a single microframe is enough for HS synchromous endpoints + * in a interval + */ + sch_ep->num_budget_microframes = 1; + + /* + * xHCI spec section6.2.3.4 + * @max_burst is the number of additional transactions + * opportunities per microframe + */ + sch_ep->pkts = max_burst + 1; + sch_ep->bw_cost_per_microframe = maxpkt * sch_ep->pkts; + } else if (sch_ep->speed >= USB_SPEED_SUPER) { + /* usb3_r1 spec section4.4.7 & 4.4.8 */ + sch_ep->cs_count = 0; + sch_ep->burst_mode = 1; + /* + * some device's (d)wBytesPerInterval is set as 0, + * then max_esit_payload is 0, so evaluate esit_pkts from + * mult and burst + */ + esit_pkts = DIV_ROUND_UP(max_esit_payload, maxpkt); + if (esit_pkts == 0) + esit_pkts = (mult + 1) * (max_burst + 1); + + if (ep_type == INT_IN_EP || ep_type == INT_OUT_EP) { + sch_ep->pkts = esit_pkts; + sch_ep->num_budget_microframes = 1; + } + + if (ep_type == ISOC_IN_EP || ep_type == ISOC_OUT_EP) { + + if (sch_ep->esit == 1) + sch_ep->pkts = esit_pkts; + else if (esit_pkts <= sch_ep->esit) + sch_ep->pkts = 1; + else + sch_ep->pkts = roundup_pow_of_two(esit_pkts) + / sch_ep->esit; + + sch_ep->num_budget_microframes = + DIV_ROUND_UP(esit_pkts, sch_ep->pkts); + + sch_ep->repeat = !!(sch_ep->num_budget_microframes > 1); + } + sch_ep->bw_cost_per_microframe = maxpkt * sch_ep->pkts; + } else if (is_fs_or_ls(sch_ep->speed)) { + sch_ep->pkts = 1; /* at most one packet for each microframe */ + + /* + * num_budget_microframes and cs_count will be updated when + * check TT for INT_OUT_EP, ISOC/INT_IN_EP type + */ + sch_ep->cs_count = DIV_ROUND_UP(maxpkt, FS_PAYLOAD_MAX); + sch_ep->num_budget_microframes = sch_ep->cs_count; + sch_ep->bw_cost_per_microframe = min_t(u32, maxpkt, FS_PAYLOAD_MAX); + } +} + +/* Get maximum bandwidth when we schedule at offset slot. */ +static u32 get_max_bw(struct mu3h_sch_bw_info *sch_bw, + struct mu3h_sch_ep_info *sch_ep, u32 offset) +{ + u32 max_bw = 0; + u32 bw; + int i, j, k; + + for (i = 0; i < sch_ep->num_esit; i++) { + u32 base = offset + i * sch_ep->esit; + + for (j = 0; j < sch_ep->num_budget_microframes; j++) { + k = XHCI_MTK_BW_INDEX(base + j); + bw = sch_bw->bus_bw[k] + sch_ep->bw_cost_per_microframe; + if (bw > max_bw) + max_bw = bw; + } + } + return max_bw; +} + +static void update_bus_bw(struct mu3h_sch_bw_info *sch_bw, + struct mu3h_sch_ep_info *sch_ep, bool used) +{ + 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++) + sch_bw->bus_bw[XHCI_MTK_BW_INDEX(base + j)] += bw_updated; + } +} + +static int check_fs_bus_bw(struct mu3h_sch_ep_info *sch_ep, int offset) +{ + struct mu3h_sch_tt *tt = sch_ep->sch_tt; + u32 tmp; + int base; + int i, j, k; + + for (i = 0; i < sch_ep->num_esit; i++) { + base = offset + i * sch_ep->esit; + + /* + * 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->num_budget_microframes; j++) { + k = XHCI_MTK_BW_INDEX(base + j); + tmp = tt->fs_bus_bw[k] + sch_ep->bw_cost_per_microframe; + if (tmp > FS_PAYLOAD_MAX) + return -ESCH_BW_OVERFLOW; + } + } + + return 0; +} + +static int check_sch_tt(struct mu3h_sch_ep_info *sch_ep, u32 offset) +{ + u32 start_ss, last_ss; + u32 start_cs, last_cs; + + if (!sch_ep->sch_tt) + return 0; + + start_ss = offset % 8; + + if (sch_ep->ep_type == ISOC_OUT_EP) { + last_ss = start_ss + sch_ep->cs_count - 1; + + /* + * usb_20 spec section11.18: + * must never schedule Start-Split in Y6 + */ + if (!(start_ss == 7 || last_ss < 6)) + return -ESCH_SS_Y6; + + } else { + u32 cs_count = DIV_ROUND_UP(sch_ep->maxpkt, FS_PAYLOAD_MAX); + + /* + * usb_20 spec section11.18: + * must never schedule Start-Split in Y6 + */ + if (start_ss == 6) + return -ESCH_SS_Y6; + + /* one uframe for ss + one uframe for idle */ + start_cs = (start_ss + 2) % 8; + last_cs = start_cs + cs_count - 1; + + if (last_cs > 7) + 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; +} |