From 85c675d0d09a45a135bddd15d7b385f8758c32fb Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 18 May 2024 19:35:05 +0200 Subject: Adding upstream version 6.7.7. Signed-off-by: Daniel Baumann --- drivers/usb/host/xhci-mtk-sch.c | 411 ++++++++++++++++++++++++++++++++++------ 1 file changed, 350 insertions(+), 61 deletions(-) (limited to 'drivers/usb/host/xhci-mtk-sch.c') diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c index 579899eb24..61f3f8bbdc 100644 --- a/drivers/usb/host/xhci-mtk-sch.c +++ b/drivers/usb/host/xhci-mtk-sch.c @@ -19,6 +19,18 @@ #define HS_BW_BOUNDARY 6144 /* usb2 spec section11.18.1: at most 188 FS bytes per microframe */ #define FS_PAYLOAD_MAX 188 +#define LS_PAYLOAD_MAX 18 +/* section 11.18.1, per fs frame */ +#define FS_BW_BOUNDARY 1157 +#define LS_BW_BOUNDARY 144 + +/* + * max number of microframes for split transfer, assume extra-cs budget is 0 + * for fs isoc in : 1 ss + 1 idle + 6 cs (roundup(1023/188)) + */ +#define TT_MICROFRAMES_MAX 8 +/* offset from SS for fs/ls isoc/intr ep (ss + idle) */ +#define CS_OFFSET 2 #define DBG_BUF_EN 64 @@ -237,17 +249,26 @@ static void drop_tt(struct usb_device *udev) static struct mu3h_sch_ep_info * create_sch_ep(struct xhci_hcd_mtk *mtk, struct usb_device *udev, - struct usb_host_endpoint *ep) + struct usb_host_endpoint *ep, struct xhci_ep_ctx *ep_ctx) { struct mu3h_sch_ep_info *sch_ep; struct mu3h_sch_bw_info *bw_info; struct mu3h_sch_tt *tt = NULL; + u32 len; bw_info = get_bw_info(mtk, udev, ep); if (!bw_info) return ERR_PTR(-ENODEV); - sch_ep = kzalloc(sizeof(*sch_ep), GFP_KERNEL); + if (is_fs_or_ls(udev->speed)) + len = TT_MICROFRAMES_MAX; + else if ((udev->speed >= USB_SPEED_SUPER) && + usb_endpoint_xfer_isoc(&ep->desc)) + len = get_esit(ep_ctx); + else + len = 1; + + sch_ep = kzalloc(struct_size(sch_ep, bw_budget_table, len), GFP_KERNEL); if (!sch_ep) return ERR_PTR(-ENOMEM); @@ -279,7 +300,11 @@ static void setup_sch_info(struct xhci_ep_ctx *ep_ctx, u32 mult; u32 esit_pkts; u32 max_esit_payload; + u32 bw_per_microframe; + u32 *bwb_table; + int i; + bwb_table = sch_ep->bw_budget_table; 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)); @@ -313,7 +338,7 @@ static void setup_sch_info(struct xhci_ep_ctx *ep_ctx, * opportunities per microframe */ sch_ep->pkts = max_burst + 1; - sch_ep->bw_cost_per_microframe = maxpkt * sch_ep->pkts; + bwb_table[0] = 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; @@ -330,6 +355,7 @@ static void setup_sch_info(struct xhci_ep_ctx *ep_ctx, if (ep_type == INT_IN_EP || ep_type == INT_OUT_EP) { sch_ep->pkts = esit_pkts; sch_ep->num_budget_microframes = 1; + bwb_table[0] = maxpkt * sch_ep->pkts; } if (ep_type == ISOC_IN_EP || ep_type == ISOC_OUT_EP) { @@ -346,18 +372,52 @@ static void setup_sch_info(struct xhci_ep_ctx *ep_ctx, DIV_ROUND_UP(esit_pkts, sch_ep->pkts); sch_ep->repeat = !!(sch_ep->num_budget_microframes > 1); + bw_per_microframe = maxpkt * sch_ep->pkts; + + for (i = 0; i < sch_ep->num_budget_microframes - 1; i++) + bwb_table[i] = bw_per_microframe; + + /* last one <= bw_per_microframe */ + bwb_table[i] = maxpkt * esit_pkts - i * bw_per_microframe; } - 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 + * @cs_count will be updated to add extra-cs when * check TT for INT_OUT_EP, ISOC/INT_IN_EP type + * @maxpkt <= 1023; */ 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); + + /* init budget table */ + if (ep_type == ISOC_OUT_EP) { + for (i = 0; i < sch_ep->cs_count - 1; i++) + bwb_table[i] = FS_PAYLOAD_MAX; + + bwb_table[i] = maxpkt - i * FS_PAYLOAD_MAX; + } else if (ep_type == INT_OUT_EP) { + /* only first one used (maxpkt <= 64), others zero */ + bwb_table[0] = maxpkt; + } else { /* INT_IN_EP or ISOC_IN_EP */ + bwb_table[0] = 0; /* start split */ + bwb_table[1] = 0; /* idle */ + /* + * @cs_count will be updated according to cs position + * (add 1 or 2 extra-cs), but assume only first + * @num_budget_microframes elements will be used later, + * although in fact it does not (extra-cs budget many receive + * some data for IN ep); + * @cs_count is 1 for INT_IN_EP (maxpkt <= 64); + */ + for (i = 0; i < sch_ep->cs_count - 1; i++) + bwb_table[i + CS_OFFSET] = FS_PAYLOAD_MAX; + + bwb_table[i + CS_OFFSET] = maxpkt - i * FS_PAYLOAD_MAX; + /* ss + idle */ + sch_ep->num_budget_microframes += CS_OFFSET; + } } } @@ -374,7 +434,7 @@ static u32 get_max_bw(struct mu3h_sch_bw_info *sch_bw, 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; + bw = sch_bw->bus_bw[k] + sch_ep->bw_budget_table[j]; if (bw > max_bw) max_bw = bw; } @@ -382,56 +442,152 @@ static u32 get_max_bw(struct mu3h_sch_bw_info *sch_bw, return max_bw; } +/* + * for OUT: get first SS consumed bw; + * for IN: get first CS consumed bw; + */ +static u16 get_fs_bw(struct mu3h_sch_ep_info *sch_ep, int offset) +{ + struct mu3h_sch_tt *tt = sch_ep->sch_tt; + u16 fs_bw; + + if (sch_ep->ep_type == ISOC_OUT_EP || sch_ep->ep_type == INT_OUT_EP) + fs_bw = tt->fs_bus_bw_out[XHCI_MTK_BW_INDEX(offset)]; + else /* skip ss + idle */ + fs_bw = tt->fs_bus_bw_in[XHCI_MTK_BW_INDEX(offset + CS_OFFSET)]; + + return fs_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); + int i, j, k; 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; + for (j = 0; j < sch_ep->num_budget_microframes; j++) { + k = XHCI_MTK_BW_INDEX(base + j); + if (used) + sch_bw->bus_bw[k] += sch_ep->bw_budget_table[j]; + else + sch_bw->bus_bw[k] -= sch_ep->bw_budget_table[j]; + } } } -static int check_fs_bus_bw(struct mu3h_sch_ep_info *sch_ep, int offset) +static int check_ls_budget_microframes(struct mu3h_sch_ep_info *sch_ep, int offset) +{ + struct mu3h_sch_tt *tt = sch_ep->sch_tt; + int i; + + if (sch_ep->speed != USB_SPEED_LOW) + return 0; + + if (sch_ep->ep_type == INT_OUT_EP) + i = XHCI_MTK_BW_INDEX(offset); + else if (sch_ep->ep_type == INT_IN_EP) + i = XHCI_MTK_BW_INDEX(offset + CS_OFFSET); /* skip ss + idle */ + else + return -EINVAL; + + if (tt->ls_bus_bw[i] + sch_ep->maxpkt > LS_PAYLOAD_MAX) + return -ESCH_BW_OVERFLOW; + + return 0; +} + +static int check_fs_budget_microframes(struct mu3h_sch_ep_info *sch_ep, int offset) { struct mu3h_sch_tt *tt = sch_ep->sch_tt; u32 tmp; - int base; + int i, k; + + /* + * for OUT eps, will transfer exactly assigned length of data, + * so can't allocate more than 188 bytes; + * but it's not for IN eps, usually it can't receive full + * 188 bytes in a uframe, if it not assign full 188 bytes, + * can add another one; + */ + for (i = 0; i < sch_ep->num_budget_microframes; i++) { + k = XHCI_MTK_BW_INDEX(offset + i); + if (sch_ep->ep_type == ISOC_OUT_EP || sch_ep->ep_type == INT_OUT_EP) + tmp = tt->fs_bus_bw_out[k] + sch_ep->bw_budget_table[i]; + else /* ep_type : ISOC IN / INTR IN */ + tmp = tt->fs_bus_bw_in[k]; + + if (tmp > FS_PAYLOAD_MAX) + return -ESCH_BW_OVERFLOW; + } + + return 0; +} + +static int check_fs_budget_frames(struct mu3h_sch_ep_info *sch_ep, int offset) +{ + struct mu3h_sch_tt *tt = sch_ep->sch_tt; + u32 head, tail; int i, j, k; + /* bugdet scheduled may cross at most two fs frames */ + j = XHCI_MTK_BW_INDEX(offset) / UFRAMES_PER_FRAME; + k = XHCI_MTK_BW_INDEX(offset + sch_ep->num_budget_microframes - 1) / UFRAMES_PER_FRAME; + + if (j != k) { + head = tt->fs_frame_bw[j]; + tail = tt->fs_frame_bw[k]; + } else { + head = tt->fs_frame_bw[j]; + tail = 0; + } + + j = roundup(offset, UFRAMES_PER_FRAME); + for (i = 0; i < sch_ep->num_budget_microframes; i++) { + if ((offset + i) < j) + head += sch_ep->bw_budget_table[i]; + else + tail += sch_ep->bw_budget_table[i]; + } + + if (head > FS_BW_BOUNDARY || tail > FS_BW_BOUNDARY) + return -ESCH_BW_OVERFLOW; + + return 0; +} + +static int check_fs_bus_bw(struct mu3h_sch_ep_info *sch_ep, int offset) +{ + int i, base; + int ret = 0; + 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; - } + ret = check_ls_budget_microframes(sch_ep, base); + if (ret) + goto err; + + ret = check_fs_budget_microframes(sch_ep, base); + if (ret) + goto err; + + ret = check_fs_budget_frames(sch_ep, base); + if (ret) + goto err; } - return 0; +err: + return ret; } -static int check_sch_tt(struct mu3h_sch_ep_info *sch_ep, u32 offset) +static int check_ss_and_cs(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; + start_ss = offset % UFRAMES_PER_FRAME; if (sch_ep->ep_type == ISOC_OUT_EP) { last_ss = start_ss + sch_ep->cs_count - 1; @@ -444,6 +600,7 @@ static int check_sch_tt(struct mu3h_sch_ep_info *sch_ep, u32 offset) return -ESCH_SS_Y6; } else { + /* maxpkt <= 1023, cs <= 6 */ u32 cs_count = DIV_ROUND_UP(sch_ep->maxpkt, FS_PAYLOAD_MAX); /* @@ -454,44 +611,171 @@ static int check_sch_tt(struct mu3h_sch_ep_info *sch_ep, u32 offset) return -ESCH_SS_Y6; /* one uframe for ss + one uframe for idle */ - start_cs = (start_ss + 2) % 8; + start_cs = (start_ss + CS_OFFSET) % UFRAMES_PER_FRAME; last_cs = start_cs + cs_count - 1; - if (last_cs > 7) return -ESCH_CS_OVERFLOW; + /* add extra-cs */ + cs_count += (last_cs == 7) ? 1 : 2; 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 0; +} + +/* + * when isoc-out transfers 188 bytes in a uframe, and send isoc/intr's + * ss token in the uframe, may cause 'bit stuff error' in downstream + * port; + * when isoc-out transfer less than 188 bytes in a uframe, shall send + * isoc-in's ss after isoc-out's ss (but hw can't ensure the sequence, + * so just avoid overlap). + */ +static int check_isoc_ss_overlap(struct mu3h_sch_ep_info *sch_ep, u32 offset) +{ + struct mu3h_sch_tt *tt = sch_ep->sch_tt; + int base; + int i, j, k; + + if (!tt) + return 0; + + for (i = 0; i < sch_ep->num_esit; i++) { + base = offset + i * sch_ep->esit; + + if (sch_ep->ep_type == ISOC_OUT_EP) { + for (j = 0; j < sch_ep->num_budget_microframes; j++) { + k = XHCI_MTK_BW_INDEX(base + j); + if (tt->in_ss_cnt[k]) + return -ESCH_SS_OVERLAP; + } + } else if (sch_ep->ep_type == ISOC_IN_EP || sch_ep->ep_type == INT_IN_EP) { + k = XHCI_MTK_BW_INDEX(base); + /* only check IN's ss */ + if (tt->fs_bus_bw_out[k]) + return -ESCH_SS_OVERLAP; + } + } + + return 0; +} + +static int check_sch_tt_budget(struct mu3h_sch_ep_info *sch_ep, u32 offset) +{ + int ret; + + ret = check_ss_and_cs(sch_ep, offset); + if (ret) + return ret; + + ret = check_isoc_ss_overlap(sch_ep, offset); + if (ret) + return ret; + return check_fs_bus_bw(sch_ep, offset); } +/* allocate microframes in the ls/fs frame */ +static int alloc_sch_portion_of_frame(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 bw_max, fs_bw_min; + u32 offset, offset_min; + u16 fs_bw; + int frames; + int i, j; + int ret; + + frames = sch_ep->esit / UFRAMES_PER_FRAME; + + for (i = 0; i < UFRAMES_PER_FRAME; i++) { + fs_bw_min = FS_PAYLOAD_MAX; + offset_min = XHCI_MTK_MAX_ESIT; + + for (j = 0; j < frames; j++) { + offset = (i + j * UFRAMES_PER_FRAME) % sch_ep->esit; + + ret = check_sch_tt_budget(sch_ep, offset); + if (ret) + continue; + + /* check hs bw domain */ + bw_max = get_max_bw(sch_bw, sch_ep, offset); + if (bw_max > bw_boundary) { + ret = -ESCH_BW_OVERFLOW; + continue; + } + + /* use best-fit between frames */ + fs_bw = get_fs_bw(sch_ep, offset); + if (fs_bw < fs_bw_min) { + fs_bw_min = fs_bw; + offset_min = offset; + } + + if (!fs_bw_min) + break; + } + + /* use first-fit between microframes in a frame */ + if (offset_min < XHCI_MTK_MAX_ESIT) + break; + } + + if (offset_min == XHCI_MTK_MAX_ESIT) + return -ESCH_BW_OVERFLOW; + + sch_ep->offset = offset_min; + + return 0; +} + 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; + u16 *fs_bus_bw; u32 base; - int i, j; + int i, j, k, f; - bw_updated = sch_ep->bw_cost_per_microframe * (used ? 1 : -1); + if (sch_ep->ep_type == ISOC_OUT_EP || sch_ep->ep_type == INT_OUT_EP) + fs_bus_bw = tt->fs_bus_bw_out; + else + fs_bus_bw = tt->fs_bus_bw_in; 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; + for (j = 0; j < sch_ep->num_budget_microframes; j++) { + k = XHCI_MTK_BW_INDEX(base + j); + f = k / UFRAMES_PER_FRAME; + if (used) { + if (sch_ep->speed == USB_SPEED_LOW) + tt->ls_bus_bw[k] += (u8)sch_ep->bw_budget_table[j]; + + fs_bus_bw[k] += (u16)sch_ep->bw_budget_table[j]; + tt->fs_frame_bw[f] += (u16)sch_ep->bw_budget_table[j]; + } else { + if (sch_ep->speed == USB_SPEED_LOW) + tt->ls_bus_bw[k] -= (u8)sch_ep->bw_budget_table[j]; + + fs_bus_bw[k] -= (u16)sch_ep->bw_budget_table[j]; + tt->fs_frame_bw[f] -= (u16)sch_ep->bw_budget_table[j]; + } + } + + if (sch_ep->ep_type == ISOC_IN_EP || sch_ep->ep_type == INT_IN_EP) { + k = XHCI_MTK_BW_INDEX(base); + if (used) + tt->in_ss_cnt[k]++; + else + tt->in_ss_cnt[k]--; + } } if (used) @@ -513,7 +797,8 @@ static int load_ep_bw(struct mu3h_sch_bw_info *sch_bw, return 0; } -static int check_sch_bw(struct mu3h_sch_ep_info *sch_ep) +/* allocate microframes for hs/ss/ssp */ +static int alloc_sch_microframes(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); @@ -521,16 +806,12 @@ static int check_sch_bw(struct mu3h_sch_ep_info *sch_ep) 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) @@ -540,21 +821,29 @@ static int check_sch_bw(struct mu3h_sch_ep_info *sch_ep) 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; + return -ESCH_BW_OVERFLOW; sch_ep->offset = min_index; - return load_ep_bw(sch_bw, sch_ep, true); + return 0; +} + +static int check_sch_bw(struct mu3h_sch_ep_info *sch_ep) +{ + int ret; + + if (sch_ep->sch_tt) + ret = alloc_sch_portion_of_frame(sch_ep); + else + ret = alloc_sch_microframes(sch_ep); + + if (ret) + return ret; + + return load_ep_bw(sch_ep->bw_info, sch_ep, true); } static void destroy_sch_ep(struct xhci_hcd_mtk *mtk, struct usb_device *udev, @@ -651,7 +940,7 @@ static int add_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev, xhci_dbg(xhci, "%s %s\n", __func__, decode_ep(ep, udev->speed)); - sch_ep = create_sch_ep(mtk, udev, ep); + sch_ep = create_sch_ep(mtk, udev, ep, ep_ctx); if (IS_ERR_OR_NULL(sch_ep)) return -ENOMEM; -- cgit v1.2.3