linux/drivers/usb/host/xhci-mtk-sch.c
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   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright (c) 2015 MediaTek Inc.
   4 * Author:
   5 *  Zhigang.Wei <zhigang.wei@mediatek.com>
   6 *  Chunfeng.Yun <chunfeng.yun@mediatek.com>
   7 */
   8
   9#include <linux/kernel.h>
  10#include <linux/module.h>
  11#include <linux/slab.h>
  12
  13#include "xhci.h"
  14#include "xhci-mtk.h"
  15
  16#define SSP_BW_BOUNDARY 130000
  17#define SS_BW_BOUNDARY  51000
  18/* table 5-5. High-speed Isoc Transaction Limits in usb_20 spec */
  19#define HS_BW_BOUNDARY  6144
  20/* usb2 spec section11.18.1: at most 188 FS bytes per microframe */
  21#define FS_PAYLOAD_MAX 188
  22/*
  23 * max number of microframes for split transfer,
  24 * for fs isoc in : 1 ss + 1 idle + 7 cs
  25 */
  26#define TT_MICROFRAMES_MAX 9
  27
  28/* mtk scheduler bitmasks */
  29#define EP_BPKTS(p)     ((p) & 0x7f)
  30#define EP_BCSCOUNT(p)  (((p) & 0x7) << 8)
  31#define EP_BBM(p)       ((p) << 11)
  32#define EP_BOFFSET(p)   ((p) & 0x3fff)
  33#define EP_BREPEAT(p)   (((p) & 0x7fff) << 16)
  34
  35static int is_fs_or_ls(enum usb_device_speed speed)
  36{
  37        return speed == USB_SPEED_FULL || speed == USB_SPEED_LOW;
  38}
  39
  40/*
  41* get the index of bandwidth domains array which @ep belongs to.
  42*
  43* the bandwidth domain array is saved to @sch_array of struct xhci_hcd_mtk,
  44* each HS root port is treated as a single bandwidth domain,
  45* but each SS root port is treated as two bandwidth domains, one for IN eps,
  46* one for OUT eps.
  47* @real_port value is defined as follow according to xHCI spec:
  48* 1 for SSport0, ..., N+1 for SSportN, N+2 for HSport0, N+3 for HSport1, etc
  49* so the bandwidth domain array is organized as follow for simplification:
  50* SSport0-OUT, SSport0-IN, ..., SSportX-OUT, SSportX-IN, HSport0, ..., HSportY
  51*/
  52static int get_bw_index(struct xhci_hcd *xhci, struct usb_device *udev,
  53        struct usb_host_endpoint *ep)
  54{
  55        struct xhci_virt_device *virt_dev;
  56        int bw_index;
  57
  58        virt_dev = xhci->devs[udev->slot_id];
  59
  60        if (udev->speed >= USB_SPEED_SUPER) {
  61                if (usb_endpoint_dir_out(&ep->desc))
  62                        bw_index = (virt_dev->real_port - 1) * 2;
  63                else
  64                        bw_index = (virt_dev->real_port - 1) * 2 + 1;
  65        } else {
  66                /* add one more for each SS port */
  67                bw_index = virt_dev->real_port + xhci->usb3_rhub.num_ports - 1;
  68        }
  69
  70        return bw_index;
  71}
  72
  73static u32 get_esit(struct xhci_ep_ctx *ep_ctx)
  74{
  75        u32 esit;
  76
  77        esit = 1 << CTX_TO_EP_INTERVAL(le32_to_cpu(ep_ctx->ep_info));
  78        if (esit > XHCI_MTK_MAX_ESIT)
  79                esit = XHCI_MTK_MAX_ESIT;
  80
  81        return esit;
  82}
  83
  84static struct mu3h_sch_tt *find_tt(struct usb_device *udev)
  85{
  86        struct usb_tt *utt = udev->tt;
  87        struct mu3h_sch_tt *tt, **tt_index, **ptt;
  88        unsigned int port;
  89        bool allocated_index = false;
  90
  91        if (!utt)
  92                return NULL;    /* Not below a TT */
  93
  94        /*
  95         * Find/create our data structure.
  96         * For hubs with a single TT, we get it directly.
  97         * For hubs with multiple TTs, there's an extra level of pointers.
  98         */
  99        tt_index = NULL;
 100        if (utt->multi) {
 101                tt_index = utt->hcpriv;
 102                if (!tt_index) {        /* Create the index array */
 103                        tt_index = kcalloc(utt->hub->maxchild,
 104                                        sizeof(*tt_index), GFP_KERNEL);
 105                        if (!tt_index)
 106                                return ERR_PTR(-ENOMEM);
 107                        utt->hcpriv = tt_index;
 108                        allocated_index = true;
 109                }
 110                port = udev->ttport - 1;
 111                ptt = &tt_index[port];
 112        } else {
 113                port = 0;
 114                ptt = (struct mu3h_sch_tt **) &utt->hcpriv;
 115        }
 116
 117        tt = *ptt;
 118        if (!tt) {      /* Create the mu3h_sch_tt */
 119                tt = kzalloc(sizeof(*tt), GFP_KERNEL);
 120                if (!tt) {
 121                        if (allocated_index) {
 122                                utt->hcpriv = NULL;
 123                                kfree(tt_index);
 124                        }
 125                        return ERR_PTR(-ENOMEM);
 126                }
 127                INIT_LIST_HEAD(&tt->ep_list);
 128                tt->usb_tt = utt;
 129                tt->tt_port = port;
 130                *ptt = tt;
 131        }
 132
 133        return tt;
 134}
 135
 136/* Release the TT above udev, if it's not in use */
 137static void drop_tt(struct usb_device *udev)
 138{
 139        struct usb_tt *utt = udev->tt;
 140        struct mu3h_sch_tt *tt, **tt_index, **ptt;
 141        int i, cnt;
 142
 143        if (!utt || !utt->hcpriv)
 144                return;         /* Not below a TT, or never allocated */
 145
 146        cnt = 0;
 147        if (utt->multi) {
 148                tt_index = utt->hcpriv;
 149                ptt = &tt_index[udev->ttport - 1];
 150                /*  How many entries are left in tt_index? */
 151                for (i = 0; i < utt->hub->maxchild; ++i)
 152                        cnt += !!tt_index[i];
 153        } else {
 154                tt_index = NULL;
 155                ptt = (struct mu3h_sch_tt **)&utt->hcpriv;
 156        }
 157
 158        tt = *ptt;
 159        if (!tt || !list_empty(&tt->ep_list))
 160                return;         /* never allocated , or still in use*/
 161
 162        *ptt = NULL;
 163        kfree(tt);
 164
 165        if (cnt == 1) {
 166                utt->hcpriv = NULL;
 167                kfree(tt_index);
 168        }
 169}
 170
 171static struct mu3h_sch_ep_info *create_sch_ep(struct usb_device *udev,
 172        struct usb_host_endpoint *ep, struct xhci_ep_ctx *ep_ctx)
 173{
 174        struct mu3h_sch_ep_info *sch_ep;
 175        struct mu3h_sch_tt *tt = NULL;
 176        u32 len_bw_budget_table;
 177        size_t mem_size;
 178
 179        if (is_fs_or_ls(udev->speed))
 180                len_bw_budget_table = TT_MICROFRAMES_MAX;
 181        else if ((udev->speed >= USB_SPEED_SUPER)
 182                        && usb_endpoint_xfer_isoc(&ep->desc))
 183                len_bw_budget_table = get_esit(ep_ctx);
 184        else
 185                len_bw_budget_table = 1;
 186
 187        mem_size = sizeof(struct mu3h_sch_ep_info) +
 188                        len_bw_budget_table * sizeof(u32);
 189        sch_ep = kzalloc(mem_size, GFP_KERNEL);
 190        if (!sch_ep)
 191                return ERR_PTR(-ENOMEM);
 192
 193        if (is_fs_or_ls(udev->speed)) {
 194                tt = find_tt(udev);
 195                if (IS_ERR(tt)) {
 196                        kfree(sch_ep);
 197                        return ERR_PTR(-ENOMEM);
 198                }
 199        }
 200
 201        sch_ep->sch_tt = tt;
 202        sch_ep->ep = ep;
 203
 204        return sch_ep;
 205}
 206
 207static void setup_sch_info(struct usb_device *udev,
 208                struct xhci_ep_ctx *ep_ctx, struct mu3h_sch_ep_info *sch_ep)
 209{
 210        u32 ep_type;
 211        u32 maxpkt;
 212        u32 max_burst;
 213        u32 mult;
 214        u32 esit_pkts;
 215        u32 max_esit_payload;
 216        u32 *bwb_table = sch_ep->bw_budget_table;
 217        int i;
 218
 219        ep_type = CTX_TO_EP_TYPE(le32_to_cpu(ep_ctx->ep_info2));
 220        maxpkt = MAX_PACKET_DECODED(le32_to_cpu(ep_ctx->ep_info2));
 221        max_burst = CTX_TO_MAX_BURST(le32_to_cpu(ep_ctx->ep_info2));
 222        mult = CTX_TO_EP_MULT(le32_to_cpu(ep_ctx->ep_info));
 223        max_esit_payload =
 224                (CTX_TO_MAX_ESIT_PAYLOAD_HI(
 225                        le32_to_cpu(ep_ctx->ep_info)) << 16) |
 226                 CTX_TO_MAX_ESIT_PAYLOAD(le32_to_cpu(ep_ctx->tx_info));
 227
 228        sch_ep->esit = get_esit(ep_ctx);
 229        sch_ep->ep_type = ep_type;
 230        sch_ep->maxpkt = maxpkt;
 231        sch_ep->offset = 0;
 232        sch_ep->burst_mode = 0;
 233        sch_ep->repeat = 0;
 234
 235        if (udev->speed == USB_SPEED_HIGH) {
 236                sch_ep->cs_count = 0;
 237
 238                /*
 239                 * usb_20 spec section5.9
 240                 * a single microframe is enough for HS synchromous endpoints
 241                 * in a interval
 242                 */
 243                sch_ep->num_budget_microframes = 1;
 244
 245                /*
 246                 * xHCI spec section6.2.3.4
 247                 * @max_burst is the number of additional transactions
 248                 * opportunities per microframe
 249                 */
 250                sch_ep->pkts = max_burst + 1;
 251                sch_ep->bw_cost_per_microframe = maxpkt * sch_ep->pkts;
 252                bwb_table[0] = sch_ep->bw_cost_per_microframe;
 253        } else if (udev->speed >= USB_SPEED_SUPER) {
 254                /* usb3_r1 spec section4.4.7 & 4.4.8 */
 255                sch_ep->cs_count = 0;
 256                sch_ep->burst_mode = 1;
 257                /*
 258                 * some device's (d)wBytesPerInterval is set as 0,
 259                 * then max_esit_payload is 0, so evaluate esit_pkts from
 260                 * mult and burst
 261                 */
 262                esit_pkts = DIV_ROUND_UP(max_esit_payload, maxpkt);
 263                if (esit_pkts == 0)
 264                        esit_pkts = (mult + 1) * (max_burst + 1);
 265
 266                if (ep_type == INT_IN_EP || ep_type == INT_OUT_EP) {
 267                        sch_ep->pkts = esit_pkts;
 268                        sch_ep->num_budget_microframes = 1;
 269                        bwb_table[0] = maxpkt * sch_ep->pkts;
 270                }
 271
 272                if (ep_type == ISOC_IN_EP || ep_type == ISOC_OUT_EP) {
 273                        u32 remainder;
 274
 275                        if (sch_ep->esit == 1)
 276                                sch_ep->pkts = esit_pkts;
 277                        else if (esit_pkts <= sch_ep->esit)
 278                                sch_ep->pkts = 1;
 279                        else
 280                                sch_ep->pkts = roundup_pow_of_two(esit_pkts)
 281                                        / sch_ep->esit;
 282
 283                        sch_ep->num_budget_microframes =
 284                                DIV_ROUND_UP(esit_pkts, sch_ep->pkts);
 285
 286                        sch_ep->repeat = !!(sch_ep->num_budget_microframes > 1);
 287                        sch_ep->bw_cost_per_microframe = maxpkt * sch_ep->pkts;
 288
 289                        remainder = sch_ep->bw_cost_per_microframe;
 290                        remainder *= sch_ep->num_budget_microframes;
 291                        remainder -= (maxpkt * esit_pkts);
 292                        for (i = 0; i < sch_ep->num_budget_microframes - 1; i++)
 293                                bwb_table[i] = sch_ep->bw_cost_per_microframe;
 294
 295                        /* last one <= bw_cost_per_microframe */
 296                        bwb_table[i] = remainder;
 297                }
 298        } else if (is_fs_or_ls(udev->speed)) {
 299                sch_ep->pkts = 1; /* at most one packet for each microframe */
 300
 301                /*
 302                 * num_budget_microframes and cs_count will be updated when
 303                 * check TT for INT_OUT_EP, ISOC/INT_IN_EP type
 304                 */
 305                sch_ep->cs_count = DIV_ROUND_UP(maxpkt, FS_PAYLOAD_MAX);
 306                sch_ep->num_budget_microframes = sch_ep->cs_count;
 307                sch_ep->bw_cost_per_microframe =
 308                        (maxpkt < FS_PAYLOAD_MAX) ? maxpkt : FS_PAYLOAD_MAX;
 309
 310                /* init budget table */
 311                if (ep_type == ISOC_OUT_EP) {
 312                        for (i = 0; i < sch_ep->num_budget_microframes; i++)
 313                                bwb_table[i] =  sch_ep->bw_cost_per_microframe;
 314                } else if (ep_type == INT_OUT_EP) {
 315                        /* only first one consumes bandwidth, others as zero */
 316                        bwb_table[0] = sch_ep->bw_cost_per_microframe;
 317                } else { /* INT_IN_EP or ISOC_IN_EP */
 318                        bwb_table[0] = 0; /* start split */
 319                        bwb_table[1] = 0; /* idle */
 320                        /*
 321                         * due to cs_count will be updated according to cs
 322                         * position, assign all remainder budget array
 323                         * elements as @bw_cost_per_microframe, but only first
 324                         * @num_budget_microframes elements will be used later
 325                         */
 326                        for (i = 2; i < TT_MICROFRAMES_MAX; i++)
 327                                bwb_table[i] =  sch_ep->bw_cost_per_microframe;
 328                }
 329        }
 330}
 331
 332/* Get maximum bandwidth when we schedule at offset slot. */
 333static u32 get_max_bw(struct mu3h_sch_bw_info *sch_bw,
 334        struct mu3h_sch_ep_info *sch_ep, u32 offset)
 335{
 336        u32 num_esit;
 337        u32 max_bw = 0;
 338        u32 bw;
 339        int i;
 340        int j;
 341
 342        num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;
 343        for (i = 0; i < num_esit; i++) {
 344                u32 base = offset + i * sch_ep->esit;
 345
 346                for (j = 0; j < sch_ep->num_budget_microframes; j++) {
 347                        bw = sch_bw->bus_bw[base + j] +
 348                                        sch_ep->bw_budget_table[j];
 349                        if (bw > max_bw)
 350                                max_bw = bw;
 351                }
 352        }
 353        return max_bw;
 354}
 355
 356static void update_bus_bw(struct mu3h_sch_bw_info *sch_bw,
 357        struct mu3h_sch_ep_info *sch_ep, bool used)
 358{
 359        u32 num_esit;
 360        u32 base;
 361        int i;
 362        int j;
 363
 364        num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;
 365        for (i = 0; i < num_esit; i++) {
 366                base = sch_ep->offset + i * sch_ep->esit;
 367                for (j = 0; j < sch_ep->num_budget_microframes; j++) {
 368                        if (used)
 369                                sch_bw->bus_bw[base + j] +=
 370                                        sch_ep->bw_budget_table[j];
 371                        else
 372                                sch_bw->bus_bw[base + j] -=
 373                                        sch_ep->bw_budget_table[j];
 374                }
 375        }
 376}
 377
 378static int check_sch_tt(struct usb_device *udev,
 379        struct mu3h_sch_ep_info *sch_ep, u32 offset)
 380{
 381        struct mu3h_sch_tt *tt = sch_ep->sch_tt;
 382        u32 extra_cs_count;
 383        u32 fs_budget_start;
 384        u32 start_ss, last_ss;
 385        u32 start_cs, last_cs;
 386        int i;
 387
 388        start_ss = offset % 8;
 389        fs_budget_start = (start_ss + 1) % 8;
 390
 391        if (sch_ep->ep_type == ISOC_OUT_EP) {
 392                last_ss = start_ss + sch_ep->cs_count - 1;
 393
 394                /*
 395                 * usb_20 spec section11.18:
 396                 * must never schedule Start-Split in Y6
 397                 */
 398                if (!(start_ss == 7 || last_ss < 6))
 399                        return -ERANGE;
 400
 401                for (i = 0; i < sch_ep->cs_count; i++)
 402                        if (test_bit(offset + i, tt->split_bit_map))
 403                                return -ERANGE;
 404
 405        } else {
 406                u32 cs_count = DIV_ROUND_UP(sch_ep->maxpkt, FS_PAYLOAD_MAX);
 407
 408                /*
 409                 * usb_20 spec section11.18:
 410                 * must never schedule Start-Split in Y6
 411                 */
 412                if (start_ss == 6)
 413                        return -ERANGE;
 414
 415                /* one uframe for ss + one uframe for idle */
 416                start_cs = (start_ss + 2) % 8;
 417                last_cs = start_cs + cs_count - 1;
 418
 419                if (last_cs > 7)
 420                        return -ERANGE;
 421
 422                if (sch_ep->ep_type == ISOC_IN_EP)
 423                        extra_cs_count = (last_cs == 7) ? 1 : 2;
 424                else /*  ep_type : INTR IN / INTR OUT */
 425                        extra_cs_count = (fs_budget_start == 6) ? 1 : 2;
 426
 427                cs_count += extra_cs_count;
 428                if (cs_count > 7)
 429                        cs_count = 7; /* HW limit */
 430
 431                for (i = 0; i < cs_count + 2; i++) {
 432                        if (test_bit(offset + i, tt->split_bit_map))
 433                                return -ERANGE;
 434                }
 435
 436                sch_ep->cs_count = cs_count;
 437                /* one for ss, the other for idle */
 438                sch_ep->num_budget_microframes = cs_count + 2;
 439
 440                /*
 441                 * if interval=1, maxp >752, num_budge_micoframe is larger
 442                 * than sch_ep->esit, will overstep boundary
 443                 */
 444                if (sch_ep->num_budget_microframes > sch_ep->esit)
 445                        sch_ep->num_budget_microframes = sch_ep->esit;
 446        }
 447
 448        return 0;
 449}
 450
 451static void update_sch_tt(struct usb_device *udev,
 452        struct mu3h_sch_ep_info *sch_ep)
 453{
 454        struct mu3h_sch_tt *tt = sch_ep->sch_tt;
 455        u32 base, num_esit;
 456        int i, j;
 457
 458        num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;
 459        for (i = 0; i < num_esit; i++) {
 460                base = sch_ep->offset + i * sch_ep->esit;
 461                for (j = 0; j < sch_ep->num_budget_microframes; j++)
 462                        set_bit(base + j, tt->split_bit_map);
 463        }
 464
 465        list_add_tail(&sch_ep->tt_endpoint, &tt->ep_list);
 466}
 467
 468static int check_sch_bw(struct usb_device *udev,
 469        struct mu3h_sch_bw_info *sch_bw, struct mu3h_sch_ep_info *sch_ep)
 470{
 471        u32 offset;
 472        u32 esit;
 473        u32 min_bw;
 474        u32 min_index;
 475        u32 worst_bw;
 476        u32 bw_boundary;
 477        u32 min_num_budget;
 478        u32 min_cs_count;
 479        bool tt_offset_ok = false;
 480        int ret;
 481
 482        esit = sch_ep->esit;
 483
 484        /*
 485         * Search through all possible schedule microframes.
 486         * and find a microframe where its worst bandwidth is minimum.
 487         */
 488        min_bw = ~0;
 489        min_index = 0;
 490        min_cs_count = sch_ep->cs_count;
 491        min_num_budget = sch_ep->num_budget_microframes;
 492        for (offset = 0; offset < esit; offset++) {
 493                if (is_fs_or_ls(udev->speed)) {
 494                        ret = check_sch_tt(udev, sch_ep, offset);
 495                        if (ret)
 496                                continue;
 497                        else
 498                                tt_offset_ok = true;
 499                }
 500
 501                if ((offset + sch_ep->num_budget_microframes) > sch_ep->esit)
 502                        break;
 503
 504                worst_bw = get_max_bw(sch_bw, sch_ep, offset);
 505                if (min_bw > worst_bw) {
 506                        min_bw = worst_bw;
 507                        min_index = offset;
 508                        min_cs_count = sch_ep->cs_count;
 509                        min_num_budget = sch_ep->num_budget_microframes;
 510                }
 511                if (min_bw == 0)
 512                        break;
 513        }
 514
 515        if (udev->speed == USB_SPEED_SUPER_PLUS)
 516                bw_boundary = SSP_BW_BOUNDARY;
 517        else if (udev->speed == USB_SPEED_SUPER)
 518                bw_boundary = SS_BW_BOUNDARY;
 519        else
 520                bw_boundary = HS_BW_BOUNDARY;
 521
 522        /* check bandwidth */
 523        if (min_bw > bw_boundary)
 524                return -ERANGE;
 525
 526        sch_ep->offset = min_index;
 527        sch_ep->cs_count = min_cs_count;
 528        sch_ep->num_budget_microframes = min_num_budget;
 529
 530        if (is_fs_or_ls(udev->speed)) {
 531                /* all offset for tt is not ok*/
 532                if (!tt_offset_ok)
 533                        return -ERANGE;
 534
 535                update_sch_tt(udev, sch_ep);
 536        }
 537
 538        /* update bus bandwidth info */
 539        update_bus_bw(sch_bw, sch_ep, 1);
 540
 541        return 0;
 542}
 543
 544static bool need_bw_sch(struct usb_host_endpoint *ep,
 545        enum usb_device_speed speed, int has_tt)
 546{
 547        /* only for periodic endpoints */
 548        if (usb_endpoint_xfer_control(&ep->desc)
 549                || usb_endpoint_xfer_bulk(&ep->desc))
 550                return false;
 551
 552        /*
 553         * for LS & FS periodic endpoints which its device is not behind
 554         * a TT are also ignored, root-hub will schedule them directly,
 555         * but need set @bpkts field of endpoint context to 1.
 556         */
 557        if (is_fs_or_ls(speed) && !has_tt)
 558                return false;
 559
 560        /* skip endpoint with zero maxpkt */
 561        if (usb_endpoint_maxp(&ep->desc) == 0)
 562                return false;
 563
 564        return true;
 565}
 566
 567int xhci_mtk_sch_init(struct xhci_hcd_mtk *mtk)
 568{
 569        struct xhci_hcd *xhci = hcd_to_xhci(mtk->hcd);
 570        struct mu3h_sch_bw_info *sch_array;
 571        int num_usb_bus;
 572        int i;
 573
 574        /* ss IN and OUT are separated */
 575        num_usb_bus = xhci->usb3_rhub.num_ports * 2 + xhci->usb2_rhub.num_ports;
 576
 577        sch_array = kcalloc(num_usb_bus, sizeof(*sch_array), GFP_KERNEL);
 578        if (sch_array == NULL)
 579                return -ENOMEM;
 580
 581        for (i = 0; i < num_usb_bus; i++)
 582                INIT_LIST_HEAD(&sch_array[i].bw_ep_list);
 583
 584        mtk->sch_array = sch_array;
 585
 586        return 0;
 587}
 588EXPORT_SYMBOL_GPL(xhci_mtk_sch_init);
 589
 590void xhci_mtk_sch_exit(struct xhci_hcd_mtk *mtk)
 591{
 592        kfree(mtk->sch_array);
 593}
 594EXPORT_SYMBOL_GPL(xhci_mtk_sch_exit);
 595
 596int xhci_mtk_add_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev,
 597                struct usb_host_endpoint *ep)
 598{
 599        struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
 600        struct xhci_hcd *xhci;
 601        struct xhci_ep_ctx *ep_ctx;
 602        struct xhci_slot_ctx *slot_ctx;
 603        struct xhci_virt_device *virt_dev;
 604        struct mu3h_sch_bw_info *sch_bw;
 605        struct mu3h_sch_ep_info *sch_ep;
 606        struct mu3h_sch_bw_info *sch_array;
 607        unsigned int ep_index;
 608        int bw_index;
 609        int ret = 0;
 610
 611        xhci = hcd_to_xhci(hcd);
 612        virt_dev = xhci->devs[udev->slot_id];
 613        ep_index = xhci_get_endpoint_index(&ep->desc);
 614        slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx);
 615        ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index);
 616        sch_array = mtk->sch_array;
 617
 618        xhci_dbg(xhci, "%s() type:%d, speed:%d, mpkt:%d, dir:%d, ep:%p\n",
 619                __func__, usb_endpoint_type(&ep->desc), udev->speed,
 620                usb_endpoint_maxp(&ep->desc),
 621                usb_endpoint_dir_in(&ep->desc), ep);
 622
 623        if (!need_bw_sch(ep, udev->speed, slot_ctx->tt_info & TT_SLOT)) {
 624                /*
 625                 * set @bpkts to 1 if it is LS or FS periodic endpoint, and its
 626                 * device does not connected through an external HS hub
 627                 */
 628                if (usb_endpoint_xfer_int(&ep->desc)
 629                        || usb_endpoint_xfer_isoc(&ep->desc))
 630                        ep_ctx->reserved[0] |= cpu_to_le32(EP_BPKTS(1));
 631
 632                return 0;
 633        }
 634
 635        bw_index = get_bw_index(xhci, udev, ep);
 636        sch_bw = &sch_array[bw_index];
 637
 638        sch_ep = create_sch_ep(udev, ep, ep_ctx);
 639        if (IS_ERR_OR_NULL(sch_ep))
 640                return -ENOMEM;
 641
 642        setup_sch_info(udev, ep_ctx, sch_ep);
 643
 644        ret = check_sch_bw(udev, sch_bw, sch_ep);
 645        if (ret) {
 646                xhci_err(xhci, "Not enough bandwidth!\n");
 647                if (is_fs_or_ls(udev->speed))
 648                        drop_tt(udev);
 649
 650                kfree(sch_ep);
 651                return -ENOSPC;
 652        }
 653
 654        list_add_tail(&sch_ep->endpoint, &sch_bw->bw_ep_list);
 655
 656        ep_ctx->reserved[0] |= cpu_to_le32(EP_BPKTS(sch_ep->pkts)
 657                | EP_BCSCOUNT(sch_ep->cs_count) | EP_BBM(sch_ep->burst_mode));
 658        ep_ctx->reserved[1] |= cpu_to_le32(EP_BOFFSET(sch_ep->offset)
 659                | EP_BREPEAT(sch_ep->repeat));
 660
 661        xhci_dbg(xhci, " PKTS:%x, CSCOUNT:%x, BM:%x, OFFSET:%x, REPEAT:%x\n",
 662                        sch_ep->pkts, sch_ep->cs_count, sch_ep->burst_mode,
 663                        sch_ep->offset, sch_ep->repeat);
 664
 665        return 0;
 666}
 667EXPORT_SYMBOL_GPL(xhci_mtk_add_ep_quirk);
 668
 669void xhci_mtk_drop_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev,
 670                struct usb_host_endpoint *ep)
 671{
 672        struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
 673        struct xhci_hcd *xhci;
 674        struct xhci_slot_ctx *slot_ctx;
 675        struct xhci_virt_device *virt_dev;
 676        struct mu3h_sch_bw_info *sch_array;
 677        struct mu3h_sch_bw_info *sch_bw;
 678        struct mu3h_sch_ep_info *sch_ep;
 679        int bw_index;
 680
 681        xhci = hcd_to_xhci(hcd);
 682        virt_dev = xhci->devs[udev->slot_id];
 683        slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx);
 684        sch_array = mtk->sch_array;
 685
 686        xhci_dbg(xhci, "%s() type:%d, speed:%d, mpks:%d, dir:%d, ep:%p\n",
 687                __func__, usb_endpoint_type(&ep->desc), udev->speed,
 688                usb_endpoint_maxp(&ep->desc),
 689                usb_endpoint_dir_in(&ep->desc), ep);
 690
 691        if (!need_bw_sch(ep, udev->speed, slot_ctx->tt_info & TT_SLOT))
 692                return;
 693
 694        bw_index = get_bw_index(xhci, udev, ep);
 695        sch_bw = &sch_array[bw_index];
 696
 697        list_for_each_entry(sch_ep, &sch_bw->bw_ep_list, endpoint) {
 698                if (sch_ep->ep == ep) {
 699                        update_bus_bw(sch_bw, sch_ep, 0);
 700                        list_del(&sch_ep->endpoint);
 701                        if (is_fs_or_ls(udev->speed)) {
 702                                list_del(&sch_ep->tt_endpoint);
 703                                drop_tt(udev);
 704                        }
 705                        kfree(sch_ep);
 706                        break;
 707                }
 708        }
 709}
 710EXPORT_SYMBOL_GPL(xhci_mtk_drop_ep_quirk);
 711