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OpenCloudOS-Kernel/drivers/usb/host/xhci-mtk-sch.c

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// 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
/*
* max number of microframes for split transfer,
* for fs isoc in : 1 ss + 1 idle + 7 cs
*/
#define TT_MICROFRAMES_MAX 9
/* 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 int is_fs_or_ls(enum usb_device_speed speed)
{
return speed == USB_SPEED_FULL || speed == USB_SPEED_LOW;
}
/*
* get the index of bandwidth domains array 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 int get_bw_index(struct xhci_hcd *xhci, struct usb_device *udev,
struct usb_host_endpoint *ep)
{
struct xhci_virt_device *virt_dev;
int bw_index;
virt_dev = xhci->devs[udev->slot_id];
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 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;
unsigned int port;
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;
}
port = udev->ttport - 1;
ptt = &tt_index[port];
} else {
port = 0;
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);
tt->usb_tt = utt;
tt->tt_port = port;
*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 usb_device *udev,
struct usb_host_endpoint *ep, struct xhci_ep_ctx *ep_ctx)
{
struct mu3h_sch_ep_info *sch_ep;
struct mu3h_sch_tt *tt = NULL;
u32 len_bw_budget_table;
size_t mem_size;
if (is_fs_or_ls(udev->speed))
len_bw_budget_table = TT_MICROFRAMES_MAX;
else if ((udev->speed >= USB_SPEED_SUPER)
&& usb_endpoint_xfer_isoc(&ep->desc))
len_bw_budget_table = get_esit(ep_ctx);
else
len_bw_budget_table = 1;
mem_size = sizeof(struct mu3h_sch_ep_info) +
len_bw_budget_table * sizeof(u32);
sch_ep = kzalloc(mem_size, 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->sch_tt = tt;
sch_ep->ep = ep;
INIT_LIST_HEAD(&sch_ep->endpoint);
INIT_LIST_HEAD(&sch_ep->tt_endpoint);
return sch_ep;
}
static void setup_sch_info(struct usb_device *udev,
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;
u32 *bwb_table = sch_ep->bw_budget_table;
int i;
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->ep_type = ep_type;
sch_ep->maxpkt = maxpkt;
sch_ep->offset = 0;
sch_ep->burst_mode = 0;
sch_ep->repeat = 0;
if (udev->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;
bwb_table[0] = sch_ep->bw_cost_per_microframe;
} else if (udev->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;
bwb_table[0] = maxpkt * sch_ep->pkts;
}
if (ep_type == ISOC_IN_EP || ep_type == ISOC_OUT_EP) {
u32 remainder;
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;
remainder = sch_ep->bw_cost_per_microframe;
remainder *= sch_ep->num_budget_microframes;
remainder -= (maxpkt * esit_pkts);
for (i = 0; i < sch_ep->num_budget_microframes - 1; i++)
bwb_table[i] = sch_ep->bw_cost_per_microframe;
/* last one <= bw_cost_per_microframe */
bwb_table[i] = remainder;
}
} else if (is_fs_or_ls(udev->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 =
(maxpkt < FS_PAYLOAD_MAX) ? maxpkt : FS_PAYLOAD_MAX;
/* init budget table */
if (ep_type == ISOC_OUT_EP) {
for (i = 0; i < sch_ep->num_budget_microframes; i++)
bwb_table[i] = sch_ep->bw_cost_per_microframe;
} else if (ep_type == INT_OUT_EP) {
/* only first one consumes bandwidth, others as zero */
bwb_table[0] = sch_ep->bw_cost_per_microframe;
} else { /* INT_IN_EP or ISOC_IN_EP */
bwb_table[0] = 0; /* start split */
bwb_table[1] = 0; /* idle */
/*
* due to cs_count will be updated according to cs
* position, assign all remainder budget array
* elements as @bw_cost_per_microframe, but only first
* @num_budget_microframes elements will be used later
*/
for (i = 2; i < TT_MICROFRAMES_MAX; i++)
bwb_table[i] = sch_ep->bw_cost_per_microframe;
}
}
}
/* 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 num_esit;
u32 max_bw = 0;
u32 bw;
int i;
int j;
num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;
for (i = 0; i < num_esit; i++) {
u32 base = offset + i * sch_ep->esit;
for (j = 0; j < sch_ep->num_budget_microframes; j++) {
bw = sch_bw->bus_bw[base + j] +
sch_ep->bw_budget_table[j];
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)
{
u32 num_esit;
u32 base;
int i;
int j;
num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;
for (i = 0; i < num_esit; i++) {
base = sch_ep->offset + i * sch_ep->esit;
for (j = 0; j < sch_ep->num_budget_microframes; j++) {
if (used)
sch_bw->bus_bw[base + j] +=
sch_ep->bw_budget_table[j];
else
sch_bw->bus_bw[base + j] -=
sch_ep->bw_budget_table[j];
}
}
sch_ep->allocated = used;
}
static int check_sch_tt(struct usb_device *udev,
struct mu3h_sch_ep_info *sch_ep, u32 offset)
{
struct mu3h_sch_tt *tt = sch_ep->sch_tt;
u32 extra_cs_count;
u32 fs_budget_start;
u32 start_ss, last_ss;
u32 start_cs, last_cs;
int i;
start_ss = offset % 8;
fs_budget_start = (start_ss + 1) % 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 -ERANGE;
for (i = 0; i < sch_ep->cs_count; i++)
if (test_bit(offset + i, tt->split_bit_map))
return -ERANGE;
} 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 -ERANGE;
/* 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 -ERANGE;
if (sch_ep->ep_type == ISOC_IN_EP)
extra_cs_count = (last_cs == 7) ? 1 : 2;
else /* ep_type : INTR IN / INTR OUT */
extra_cs_count = (fs_budget_start == 6) ? 1 : 2;
cs_count += extra_cs_count;
if (cs_count > 7)
cs_count = 7; /* HW limit */
for (i = 0; i < cs_count + 2; i++) {
if (test_bit(offset + i, tt->split_bit_map))
return -ERANGE;
}
sch_ep->cs_count = cs_count;
/* one for ss, the other for idle */
sch_ep->num_budget_microframes = cs_count + 2;
/*
* 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;
}
static void update_sch_tt(struct usb_device *udev,
struct mu3h_sch_ep_info *sch_ep)
{
struct mu3h_sch_tt *tt = sch_ep->sch_tt;
u32 base, num_esit;
int i, j;
num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;
for (i = 0; i < num_esit; i++) {
base = sch_ep->offset + i * sch_ep->esit;
for (j = 0; j < sch_ep->num_budget_microframes; j++)
set_bit(base + j, tt->split_bit_map);
}
list_add_tail(&sch_ep->tt_endpoint, &tt->ep_list);
}
static int check_sch_bw(struct usb_device *udev,
struct mu3h_sch_bw_info *sch_bw, struct mu3h_sch_ep_info *sch_ep)
{
u32 offset;
u32 esit;
u32 min_bw;
u32 min_index;
u32 worst_bw;
u32 bw_boundary;
u32 min_num_budget;
u32 min_cs_count;
bool tt_offset_ok = false;
int ret;
esit = sch_ep->esit;
/*
* Search through all possible schedule microframes.
* and find a microframe where its worst bandwidth is minimum.
*/
min_bw = ~0;
min_index = 0;
min_cs_count = sch_ep->cs_count;
min_num_budget = sch_ep->num_budget_microframes;
for (offset = 0; offset < esit; offset++) {
if (is_fs_or_ls(udev->speed)) {
ret = check_sch_tt(udev, sch_ep, offset);
if (ret)
continue;
else
tt_offset_ok = true;
}
if ((offset + sch_ep->num_budget_microframes) > sch_ep->esit)
break;
worst_bw = get_max_bw(sch_bw, sch_ep, offset);
if (min_bw > worst_bw) {
min_bw = worst_bw;
min_index = offset;
min_cs_count = sch_ep->cs_count;
min_num_budget = sch_ep->num_budget_microframes;
}
if (min_bw == 0)
break;
}
if (udev->speed == USB_SPEED_SUPER_PLUS)
bw_boundary = SSP_BW_BOUNDARY;
else if (udev->speed == USB_SPEED_SUPER)
bw_boundary = SS_BW_BOUNDARY;
else
bw_boundary = HS_BW_BOUNDARY;
/* check bandwidth */
if (min_bw > bw_boundary)
return -ERANGE;
sch_ep->offset = min_index;
sch_ep->cs_count = min_cs_count;
sch_ep->num_budget_microframes = min_num_budget;
if (is_fs_or_ls(udev->speed)) {
/* all offset for tt is not ok*/
if (!tt_offset_ok)
return -ERANGE;
update_sch_tt(udev, sch_ep);
}
/* update bus bandwidth info */
update_bus_bw(sch_bw, sch_ep, 1);
return 0;
}
static void destroy_sch_ep(struct usb_device *udev,
struct mu3h_sch_bw_info *sch_bw, struct mu3h_sch_ep_info *sch_ep)
{
/* only release ep bw check passed by check_sch_bw() */
if (sch_ep->allocated)
update_bus_bw(sch_bw, sch_ep, 0);
list_del(&sch_ep->endpoint);
if (sch_ep->sch_tt) {
list_del(&sch_ep->tt_endpoint);
drop_tt(udev);
}
kfree(sch_ep);
}
static bool need_bw_sch(struct usb_host_endpoint *ep,
enum usb_device_speed speed, int has_tt)
{
/* 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(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;
int i;
/* 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;
for (i = 0; i < num_usb_bus; i++)
INIT_LIST_HEAD(&sch_array[i].bw_ep_list);
mtk->sch_array = sch_array;
INIT_LIST_HEAD(&mtk->bw_ep_chk_list);
return 0;
}
EXPORT_SYMBOL_GPL(xhci_mtk_sch_init);
void xhci_mtk_sch_exit(struct xhci_hcd_mtk *mtk)
{
kfree(mtk->sch_array);
}
EXPORT_SYMBOL_GPL(xhci_mtk_sch_exit);
int xhci_mtk_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;
struct xhci_ep_ctx *ep_ctx;
struct xhci_slot_ctx *slot_ctx;
struct xhci_virt_device *virt_dev;
struct mu3h_sch_ep_info *sch_ep;
unsigned int ep_index;
xhci = hcd_to_xhci(hcd);
virt_dev = xhci->devs[udev->slot_id];
ep_index = xhci_get_endpoint_index(&ep->desc);
slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx);
ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index);
xhci_dbg(xhci, "%s() type:%d, speed:%d, mpkt:%d, dir:%d, ep:%p\n",
__func__, usb_endpoint_type(&ep->desc), udev->speed,
usb_endpoint_maxp(&ep->desc),
usb_endpoint_dir_in(&ep->desc), ep);
if (!need_bw_sch(ep, udev->speed, slot_ctx->tt_info & TT_SLOT)) {
/*
* 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;
}
sch_ep = create_sch_ep(udev, ep, ep_ctx);
if (IS_ERR_OR_NULL(sch_ep))
return -ENOMEM;
setup_sch_info(udev, ep_ctx, sch_ep);
list_add_tail(&sch_ep->endpoint, &mtk->bw_ep_chk_list);
return 0;
}
EXPORT_SYMBOL_GPL(xhci_mtk_add_ep_quirk);
void xhci_mtk_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;
struct xhci_slot_ctx *slot_ctx;
struct xhci_virt_device *virt_dev;
struct mu3h_sch_bw_info *sch_array;
struct mu3h_sch_bw_info *sch_bw;
struct mu3h_sch_ep_info *sch_ep, *tmp;
int bw_index;
xhci = hcd_to_xhci(hcd);
virt_dev = xhci->devs[udev->slot_id];
slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx);
sch_array = mtk->sch_array;
xhci_dbg(xhci, "%s() type:%d, speed:%d, mpks:%d, dir:%d, ep:%p\n",
__func__, usb_endpoint_type(&ep->desc), udev->speed,
usb_endpoint_maxp(&ep->desc),
usb_endpoint_dir_in(&ep->desc), ep);
if (!need_bw_sch(ep, udev->speed, slot_ctx->tt_info & TT_SLOT))
return;
bw_index = get_bw_index(xhci, udev, ep);
sch_bw = &sch_array[bw_index];
list_for_each_entry_safe(sch_ep, tmp, &sch_bw->bw_ep_list, endpoint) {
if (sch_ep->ep == ep) {
destroy_sch_ep(udev, sch_bw, sch_ep);
break;
}
}
}
EXPORT_SYMBOL_GPL(xhci_mtk_drop_ep_quirk);
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_bw_info *sch_bw;
struct mu3h_sch_ep_info *sch_ep, *tmp;
int bw_index, 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) {
bw_index = get_bw_index(xhci, udev, sch_ep->ep);
sch_bw = &mtk->sch_array[bw_index];
ret = check_sch_bw(udev, sch_bw, sch_ep);
if (ret) {
xhci_err(xhci, "Not enough bandwidth!\n");
return -ENOSPC;
}
}
list_for_each_entry_safe(sch_ep, tmp, &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);
bw_index = get_bw_index(xhci, udev, ep);
sch_bw = &mtk->sch_array[bw_index];
list_move_tail(&sch_ep->endpoint, &sch_bw->bw_ep_list);
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);
}
return xhci_check_bandwidth(hcd, udev);
}
EXPORT_SYMBOL_GPL(xhci_mtk_check_bandwidth);
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_bw_info *sch_bw;
struct mu3h_sch_ep_info *sch_ep, *tmp;
int bw_index;
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) {
bw_index = get_bw_index(xhci, udev, sch_ep->ep);
sch_bw = &mtk->sch_array[bw_index];
destroy_sch_ep(udev, sch_bw, sch_ep);
}
xhci_reset_bandwidth(hcd, udev);
}
EXPORT_SYMBOL_GPL(xhci_mtk_reset_bandwidth);
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