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usb: dwc2: host: Rename some fields in struct dwc2_qh
This no-op change just does some renames to simplify a future patch. 1. The "interval" field is renamed to "host_interval" to make it more obvious that this interval may be 8 times the interval that the device sees (if we're doing split transactions). A future patch will also add the "device_interval" field. 2. The "usecs" field is renamed to "host_us" again to make it more obvious that this is the time for the transaction as seen by the host. For split transactions the device may see a much longer transaction time. A future patch will also add "device_us". 3. The "sched_frame" field is renamed to "next_active_frame". The name "sched_frame" kept confusing me because it felt like something more permament (the QH's reservation or something). The name "next_active_frame" makes it more obvious that this field is constantly changing. Acked-by: John Youn <johnyoun@synopsys.com> Signed-off-by: Douglas Anderson <dianders@chromium.org> Tested-by: Heiko Stuebner <heiko@sntech.de> Tested-by: Stefan Wahren <stefan.wahren@i2se.com> Signed-off-by: Felipe Balbi <balbi@kernel.org>
This commit is contained in:
parent
4e50e0110c
commit
ced9eee122
4 changed files with 92 additions and 82 deletions
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@ -236,10 +236,14 @@ enum dwc2_transaction_type {
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* @do_split: Full/low speed endpoint on high-speed hub requires split
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* @td_first: Index of first activated isochronous transfer descriptor
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* @td_last: Index of last activated isochronous transfer descriptor
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* @usecs: Bandwidth in microseconds per (micro)frame
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* @interval: Interval between transfers in (micro)frames
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* @sched_frame: (Micro)frame to initialize a periodic transfer.
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* The transfer executes in the following (micro)frame.
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* @host_us: Bandwidth in microseconds per transfer as seen by host
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* @host_interval: Interval between transfers as seen by the host. If
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* the host is high speed and the device is low speed this
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* will be 8 times device interval.
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* @next_active_frame: (Micro)frame before we next need to put something on
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* the bus. We'll move the qh to active here. If the
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* host is in high speed mode this will be a uframe. If
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* the host is in low speed mode this will be a full frame.
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* @frame_usecs: Internal variable used by the microframe scheduler
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* @start_split_frame: (Micro)frame at which last start split was initialized
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* @ntd: Actual number of transfer descriptors in a list
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@ -272,9 +276,9 @@ struct dwc2_qh {
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u8 do_split;
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u8 td_first;
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u8 td_last;
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u16 usecs;
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u16 interval;
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u16 sched_frame;
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u16 host_us;
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u16 host_interval;
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u16 next_active_frame;
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u16 frame_usecs[8];
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u16 start_split_frame;
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u16 ntd;
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@ -651,7 +655,7 @@ static inline u16 dwc2_hcd_get_ep_bandwidth(struct dwc2_hsotg *hsotg,
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return 0;
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}
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return qh->usecs;
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return qh->host_us;
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}
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extern void dwc2_hcd_save_data_toggle(struct dwc2_hsotg *hsotg,
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@ -81,7 +81,7 @@ static u16 dwc2_max_desc_num(struct dwc2_qh *qh)
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static u16 dwc2_frame_incr_val(struct dwc2_qh *qh)
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{
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return qh->dev_speed == USB_SPEED_HIGH ?
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(qh->interval + 8 - 1) / 8 : qh->interval;
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(qh->host_interval + 8 - 1) / 8 : qh->host_interval;
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}
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static int dwc2_desc_list_alloc(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
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@ -252,7 +252,7 @@ static void dwc2_update_frame_list(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
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chan = qh->channel;
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inc = dwc2_frame_incr_val(qh);
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if (qh->ep_type == USB_ENDPOINT_XFER_ISOC)
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i = dwc2_frame_list_idx(qh->sched_frame);
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i = dwc2_frame_list_idx(qh->next_active_frame);
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else
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i = 0;
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@ -278,13 +278,13 @@ static void dwc2_update_frame_list(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
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return;
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chan->schinfo = 0;
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if (chan->speed == USB_SPEED_HIGH && qh->interval) {
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if (chan->speed == USB_SPEED_HIGH && qh->host_interval) {
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j = 1;
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/* TODO - check this */
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inc = (8 + qh->interval - 1) / qh->interval;
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inc = (8 + qh->host_interval - 1) / qh->host_interval;
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for (i = 0; i < inc; i++) {
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chan->schinfo |= j;
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j = j << qh->interval;
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j = j << qh->host_interval;
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}
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} else {
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chan->schinfo = 0xff;
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@ -431,7 +431,10 @@ static u16 dwc2_calc_starting_frame(struct dwc2_hsotg *hsotg,
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hsotg->frame_number = dwc2_hcd_get_frame_number(hsotg);
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/* sched_frame is always frame number (not uFrame) both in FS and HS! */
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/*
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* next_active_frame is always frame number (not uFrame) both in FS
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* and HS!
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*/
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/*
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* skip_frames is used to limit activated descriptors number
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@ -514,13 +517,13 @@ static u16 dwc2_recalc_initial_desc_idx(struct dwc2_hsotg *hsotg,
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*/
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fr_idx_tmp = dwc2_frame_list_idx(frame);
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fr_idx = (FRLISTEN_64_SIZE +
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dwc2_frame_list_idx(qh->sched_frame) - fr_idx_tmp)
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% dwc2_frame_incr_val(qh);
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dwc2_frame_list_idx(qh->next_active_frame) -
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fr_idx_tmp) % dwc2_frame_incr_val(qh);
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fr_idx = (fr_idx + fr_idx_tmp) % FRLISTEN_64_SIZE;
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} else {
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qh->sched_frame = dwc2_calc_starting_frame(hsotg, qh,
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qh->next_active_frame = dwc2_calc_starting_frame(hsotg, qh,
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&skip_frames);
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fr_idx = dwc2_frame_list_idx(qh->sched_frame);
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fr_idx = dwc2_frame_list_idx(qh->next_active_frame);
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}
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qh->td_first = qh->td_last = dwc2_frame_to_desc_idx(qh, fr_idx);
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@ -583,7 +586,7 @@ static void dwc2_init_isoc_dma_desc(struct dwc2_hsotg *hsotg,
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u16 next_idx;
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idx = qh->td_last;
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inc = qh->interval;
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inc = qh->host_interval;
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hsotg->frame_number = dwc2_hcd_get_frame_number(hsotg);
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cur_idx = dwc2_frame_list_idx(hsotg->frame_number);
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next_idx = dwc2_desclist_idx_inc(qh->td_last, inc, qh->dev_speed);
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@ -605,11 +608,11 @@ static void dwc2_init_isoc_dma_desc(struct dwc2_hsotg *hsotg,
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}
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}
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if (qh->interval) {
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ntd_max = (dwc2_max_desc_num(qh) + qh->interval - 1) /
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qh->interval;
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if (qh->host_interval) {
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ntd_max = (dwc2_max_desc_num(qh) + qh->host_interval - 1) /
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qh->host_interval;
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if (skip_frames && !qh->channel)
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ntd_max -= skip_frames / qh->interval;
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ntd_max -= skip_frames / qh->host_interval;
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}
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max_xfer_size = qh->dev_speed == USB_SPEED_HIGH ?
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@ -1029,7 +1032,7 @@ static void dwc2_complete_isoc_xfer_ddma(struct dwc2_hsotg *hsotg,
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idx);
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if (rc < 0)
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return;
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idx = dwc2_desclist_idx_inc(idx, qh->interval,
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idx = dwc2_desclist_idx_inc(idx, qh->host_interval,
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chan->speed);
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if (!rc)
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continue;
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@ -1039,7 +1042,7 @@ static void dwc2_complete_isoc_xfer_ddma(struct dwc2_hsotg *hsotg,
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/* rc == DWC2_CMPL_STOP */
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if (qh->interval >= 32)
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if (qh->host_interval >= 32)
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goto stop_scan;
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qh->td_first = idx;
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@ -148,9 +148,11 @@ static void dwc2_sof_intr(struct dwc2_hsotg *hsotg)
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while (qh_entry != &hsotg->periodic_sched_inactive) {
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qh = list_entry(qh_entry, struct dwc2_qh, qh_list_entry);
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qh_entry = qh_entry->next;
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if (dwc2_frame_num_le(qh->sched_frame, hsotg->frame_number)) {
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dwc2_sch_vdbg(hsotg, "QH=%p ready fn=%04x, sch=%04x\n",
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qh, hsotg->frame_number, qh->sched_frame);
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if (dwc2_frame_num_le(qh->next_active_frame,
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hsotg->frame_number)) {
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dwc2_sch_vdbg(hsotg, "QH=%p ready fn=%04x, nxt=%04x\n",
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qh, hsotg->frame_number,
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qh->next_active_frame);
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/*
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* Move QH to the ready list to be executed next
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@ -1368,7 +1370,7 @@ static void dwc2_hc_nyet_intr(struct dwc2_hsotg *hsotg,
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int frnum = dwc2_hcd_get_frame_number(hsotg);
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if (dwc2_full_frame_num(frnum) !=
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dwc2_full_frame_num(chan->qh->sched_frame)) {
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dwc2_full_frame_num(chan->qh->next_active_frame)) {
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/*
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* No longer in the same full speed frame.
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* Treat this as a transaction error.
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@ -78,7 +78,7 @@ static void dwc2_do_unreserve(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
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list_del_init(&qh->qh_list_entry);
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/* Update claimed usecs per (micro)frame */
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hsotg->periodic_usecs -= qh->usecs;
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hsotg->periodic_usecs -= qh->host_us;
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if (hsotg->core_params->uframe_sched > 0) {
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int i;
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@ -193,40 +193,40 @@ static void dwc2_qh_init(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
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int bytecount =
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dwc2_hb_mult(qh->maxp) * dwc2_max_packet(qh->maxp);
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qh->usecs = NS_TO_US(usb_calc_bus_time(qh->do_split ?
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USB_SPEED_HIGH : dev_speed, qh->ep_is_in,
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qh->ep_type == USB_ENDPOINT_XFER_ISOC,
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bytecount));
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qh->host_us = NS_TO_US(usb_calc_bus_time(qh->do_split ?
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USB_SPEED_HIGH : dev_speed, qh->ep_is_in,
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qh->ep_type == USB_ENDPOINT_XFER_ISOC,
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bytecount));
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/* Ensure frame_number corresponds to the reality */
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hsotg->frame_number = dwc2_hcd_get_frame_number(hsotg);
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/* Start in a slightly future (micro)frame */
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qh->sched_frame = dwc2_frame_num_inc(hsotg->frame_number,
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qh->next_active_frame = dwc2_frame_num_inc(hsotg->frame_number,
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SCHEDULE_SLOP);
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qh->interval = urb->interval;
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dwc2_sch_dbg(hsotg, "QH=%p init sch=%04x, fn=%04x, int=%#x\n",
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qh, qh->sched_frame, hsotg->frame_number,
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qh->interval);
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qh->host_interval = urb->interval;
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dwc2_sch_dbg(hsotg, "QH=%p init nxt=%04x, fn=%04x, int=%#x\n",
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qh, qh->next_active_frame, hsotg->frame_number,
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qh->host_interval);
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#if 0
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/* Increase interrupt polling rate for debugging */
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if (qh->ep_type == USB_ENDPOINT_XFER_INT)
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qh->interval = 8;
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qh->host_interval = 8;
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#endif
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hprt = dwc2_readl(hsotg->regs + HPRT0);
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prtspd = (hprt & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT;
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if (prtspd == HPRT0_SPD_HIGH_SPEED &&
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(dev_speed == USB_SPEED_LOW ||
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dev_speed == USB_SPEED_FULL)) {
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qh->interval *= 8;
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qh->sched_frame |= 0x7;
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qh->start_split_frame = qh->sched_frame;
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qh->host_interval *= 8;
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qh->next_active_frame |= 0x7;
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qh->start_split_frame = qh->next_active_frame;
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dwc2_sch_dbg(hsotg,
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"QH=%p init*8 sch=%04x, fn=%04x, int=%#x\n",
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qh, qh->sched_frame, hsotg->frame_number,
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qh->interval);
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"QH=%p init*8 nxt=%04x, fn=%04x, int=%#x\n",
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qh, qh->next_active_frame,
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hsotg->frame_number, qh->host_interval);
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}
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dev_dbg(hsotg->dev, "interval=%d\n", qh->interval);
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dev_dbg(hsotg->dev, "interval=%d\n", qh->host_interval);
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}
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dev_vdbg(hsotg->dev, "DWC OTG HCD QH Initialized\n");
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@ -277,9 +277,9 @@ static void dwc2_qh_init(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
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if (qh->ep_type == USB_ENDPOINT_XFER_INT) {
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dev_vdbg(hsotg->dev, "DWC OTG HCD QH - usecs = %d\n",
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qh->usecs);
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qh->host_us);
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dev_vdbg(hsotg->dev, "DWC OTG HCD QH - interval = %d\n",
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qh->interval);
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qh->host_interval);
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}
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}
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@ -404,19 +404,19 @@ static int dwc2_check_periodic_bandwidth(struct dwc2_hsotg *hsotg,
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* High speed mode
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* Max periodic usecs is 80% x 125 usec = 100 usec
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*/
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max_claimed_usecs = 100 - qh->usecs;
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max_claimed_usecs = 100 - qh->host_us;
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} else {
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/*
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* Full speed mode
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* Max periodic usecs is 90% x 1000 usec = 900 usec
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*/
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max_claimed_usecs = 900 - qh->usecs;
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max_claimed_usecs = 900 - qh->host_us;
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}
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if (hsotg->periodic_usecs > max_claimed_usecs) {
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dev_err(hsotg->dev,
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"%s: already claimed usecs %d, required usecs %d\n",
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__func__, hsotg->periodic_usecs, qh->usecs);
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__func__, hsotg->periodic_usecs, qh->host_us);
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status = -ENOSPC;
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}
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@ -443,7 +443,7 @@ void dwc2_hcd_init_usecs(struct dwc2_hsotg *hsotg)
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static int dwc2_find_single_uframe(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
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{
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unsigned short utime = qh->usecs;
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unsigned short utime = qh->host_us;
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int i;
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for (i = 0; i < 8; i++) {
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@ -462,7 +462,7 @@ static int dwc2_find_single_uframe(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
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*/
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static int dwc2_find_multi_uframe(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
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{
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unsigned short utime = qh->usecs;
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unsigned short utime = qh->host_us;
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unsigned short xtime;
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int t_left;
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int i;
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@ -608,11 +608,11 @@ static int dwc2_schedule_periodic(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
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/* Set the new frame up */
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if (frame >= 0) {
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qh->sched_frame &= ~0x7;
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qh->sched_frame |= (frame & 7);
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qh->next_active_frame &= ~0x7;
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qh->next_active_frame |= (frame & 7);
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dwc2_sch_dbg(hsotg,
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"QH=%p sched_p sch=%04x, uf=%d\n",
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qh, qh->sched_frame, frame);
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"QH=%p sched_p nxt=%04x, uf=%d\n",
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qh, qh->next_active_frame, frame);
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}
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if (status > 0)
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@ -641,7 +641,7 @@ static int dwc2_schedule_periodic(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
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hsotg->periodic_channels++;
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/* Update claimed usecs per (micro)frame */
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hsotg->periodic_usecs += qh->usecs;
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hsotg->periodic_usecs += qh->host_us;
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}
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qh->unreserve_pending = 0;
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@ -716,7 +716,7 @@ int dwc2_hcd_qh_add(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
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/* QH already in a schedule */
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return 0;
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if (!dwc2_frame_num_le(qh->sched_frame, hsotg->frame_number) &&
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if (!dwc2_frame_num_le(qh->next_active_frame, hsotg->frame_number) &&
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!hsotg->frame_number) {
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u16 new_frame;
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@ -725,9 +725,9 @@ int dwc2_hcd_qh_add(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
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new_frame = dwc2_frame_num_inc(hsotg->frame_number,
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SCHEDULE_SLOP);
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dwc2_sch_vdbg(hsotg, "QH=%p reset sch=%04x=>%04x\n",
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qh, qh->sched_frame, new_frame);
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qh->sched_frame = new_frame;
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dwc2_sch_vdbg(hsotg, "QH=%p reset nxt=%04x=>%04x\n",
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qh, qh->next_active_frame, new_frame);
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qh->next_active_frame = new_frame;
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}
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/* Add the new QH to the appropriate schedule */
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@ -793,10 +793,10 @@ static void dwc2_sched_periodic_split(struct dwc2_hsotg *hsotg,
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int sched_next_periodic_split)
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{
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u16 incr;
|
||||
u16 old_frame = qh->sched_frame;
|
||||
u16 old_frame = qh->next_active_frame;
|
||||
|
||||
if (sched_next_periodic_split) {
|
||||
qh->sched_frame = frame_number;
|
||||
qh->next_active_frame = frame_number;
|
||||
incr = dwc2_frame_num_inc(qh->start_split_frame, 1);
|
||||
if (dwc2_frame_num_le(frame_number, incr)) {
|
||||
/*
|
||||
|
@ -807,23 +807,24 @@ static void dwc2_sched_periodic_split(struct dwc2_hsotg *hsotg,
|
|||
*/
|
||||
if (qh->ep_type != USB_ENDPOINT_XFER_ISOC ||
|
||||
qh->ep_is_in != 0) {
|
||||
qh->sched_frame =
|
||||
dwc2_frame_num_inc(qh->sched_frame, 1);
|
||||
qh->next_active_frame = dwc2_frame_num_inc(
|
||||
qh->next_active_frame, 1);
|
||||
}
|
||||
}
|
||||
} else {
|
||||
qh->sched_frame = dwc2_frame_num_inc(qh->start_split_frame,
|
||||
qh->interval);
|
||||
if (dwc2_frame_num_le(qh->sched_frame, frame_number))
|
||||
qh->sched_frame = frame_number;
|
||||
qh->sched_frame |= 0x7;
|
||||
qh->start_split_frame = qh->sched_frame;
|
||||
qh->next_active_frame =
|
||||
dwc2_frame_num_inc(qh->start_split_frame,
|
||||
qh->host_interval);
|
||||
if (dwc2_frame_num_le(qh->next_active_frame, frame_number))
|
||||
qh->next_active_frame = frame_number;
|
||||
qh->next_active_frame |= 0x7;
|
||||
qh->start_split_frame = qh->next_active_frame;
|
||||
}
|
||||
|
||||
dwc2_sch_vdbg(hsotg, "QH=%p next(%d) fn=%04x, sch=%04x=>%04x (%+d)\n",
|
||||
dwc2_sch_vdbg(hsotg, "QH=%p next(%d) fn=%04x, nxt=%04x=>%04x (%+d)\n",
|
||||
qh, sched_next_periodic_split, frame_number, old_frame,
|
||||
qh->sched_frame,
|
||||
dwc2_frame_num_dec(qh->sched_frame, old_frame));
|
||||
qh->next_active_frame,
|
||||
dwc2_frame_num_dec(qh->next_active_frame, old_frame));
|
||||
}
|
||||
|
||||
/*
|
||||
|
@ -861,10 +862,10 @@ void dwc2_hcd_qh_deactivate(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
|
|||
dwc2_sched_periodic_split(hsotg, qh, frame_number,
|
||||
sched_next_periodic_split);
|
||||
} else {
|
||||
qh->sched_frame = dwc2_frame_num_inc(qh->sched_frame,
|
||||
qh->interval);
|
||||
if (dwc2_frame_num_le(qh->sched_frame, frame_number))
|
||||
qh->sched_frame = frame_number;
|
||||
qh->next_active_frame = dwc2_frame_num_inc(
|
||||
qh->next_active_frame, qh->host_interval);
|
||||
if (dwc2_frame_num_le(qh->next_active_frame, frame_number))
|
||||
qh->next_active_frame = frame_number;
|
||||
}
|
||||
|
||||
if (list_empty(&qh->qtd_list)) {
|
||||
|
@ -876,9 +877,9 @@ void dwc2_hcd_qh_deactivate(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
|
|||
* appropriate queue
|
||||
*/
|
||||
if ((hsotg->core_params->uframe_sched > 0 &&
|
||||
dwc2_frame_num_le(qh->sched_frame, frame_number)) ||
|
||||
dwc2_frame_num_le(qh->next_active_frame, frame_number)) ||
|
||||
(hsotg->core_params->uframe_sched <= 0 &&
|
||||
qh->sched_frame == frame_number))
|
||||
qh->next_active_frame == frame_number))
|
||||
list_move_tail(&qh->qh_list_entry,
|
||||
&hsotg->periodic_sched_ready);
|
||||
else
|
||||
|
|
Loading…
Reference in a new issue