From: Douglas Anderson <dianders@chromium.org> To: John Youn <John.Youn@synopsys.com>, balbi@ti.com, kever.yang@rock-chips.com Cc: "Heiko Stübner" <heiko@sntech.de>, linux-rockchip@lists.infradead.org, "Julius Werner" <jwerner@chromium.org>, gregory.herrero@intel.com, yousaf.kaukab@intel.com, dinguyen@opensource.altera.com, stern@rowland.harvard.edu, ming.lei@canonical.com, "Douglas Anderson" <dianders@chromium.org>, johnyoun@synopsys.com, gregkh@linuxfoundation.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 14/21] usb: dwc2: host: Split code out to make dwc2_do_reserve() Date: Wed, 20 Jan 2016 21:04:25 -0800 [thread overview] Message-ID: <1453352672-27890-15-git-send-email-dianders@chromium.org> (raw) In-Reply-To: <1453352672-27890-1-git-send-email-dianders@chromium.org> This no-op change splits code out of dwc2_schedule_periodic() into a dwc2_do_reserve() function. This makes it a little easier to follow the logic. Signed-off-by: Douglas Anderson <dianders@chromium.org> --- Changes in v4: - Split code out to make dwc2_do_reserve() new for v4. Changes in v3: None Changes in v2: None drivers/usb/dwc2/hcd_queue.c | 112 ++++++++++++++++++++++++++----------------- 1 file changed, 67 insertions(+), 45 deletions(-) diff --git a/drivers/usb/dwc2/hcd_queue.c b/drivers/usb/dwc2/hcd_queue.c index 8a2067bc1e62..9ce407e5017d 100644 --- a/drivers/usb/dwc2/hcd_queue.c +++ b/drivers/usb/dwc2/hcd_queue.c @@ -245,6 +245,70 @@ static int dwc2_find_uframe(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) } /** + * dwc2_do_reserve() - Make a periodic reservation + * + * Try to allocate space in the periodic schedule. Depending on parameters + * this might use the microframe scheduler or the dumb scheduler. + * + * @hsotg: The HCD state structure for the DWC OTG controller + * @qh: QH for the periodic transfer. + * + * Returns: 0 upon success; error upon failure. + */ +static int dwc2_do_reserve(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) +{ + int status; + + if (hsotg->core_params->uframe_sched > 0) { + int frame = -1; + + status = dwc2_find_uframe(hsotg, qh); + if (status == 0) + frame = 7; + else if (status > 0) + frame = status - 1; + + /* Set the new frame up */ + if (frame >= 0) { + qh->next_active_frame &= ~0x7; + qh->next_active_frame |= (frame & 7); + dwc2_sch_dbg(hsotg, + "QH=%p sched_p nxt=%04x, uf=%d\n", + qh, qh->next_active_frame, frame); + } + + if (status > 0) + status = 0; + } else { + status = dwc2_periodic_channel_available(hsotg); + if (status) { + dev_info(hsotg->dev, + "%s: No host channel available for periodic transfer\n", + __func__); + return status; + } + + status = dwc2_check_periodic_bandwidth(hsotg, qh); + } + + if (status) { + dev_dbg(hsotg->dev, + "%s: Insufficient periodic bandwidth for periodic transfer\n", + __func__); + return status; + } + + if (hsotg->core_params->uframe_sched <= 0) + /* Reserve periodic channel */ + hsotg->periodic_channels++; + + /* Update claimed usecs per (micro)frame */ + hsotg->periodic_usecs += qh->host_us; + + return 0; +} + +/** * dwc2_do_unreserve() - Actually release the periodic reservation * * This function actually releases the periodic bandwidth that was reserved @@ -393,51 +457,9 @@ static int dwc2_schedule_periodic(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) * that case. */ if (!qh->unreserve_pending) { - if (hsotg->core_params->uframe_sched > 0) { - int frame = -1; - - status = dwc2_find_uframe(hsotg, qh); - if (status == 0) - frame = 7; - else if (status > 0) - frame = status - 1; - - /* Set the new frame up */ - if (frame >= 0) { - qh->next_active_frame &= ~0x7; - qh->next_active_frame |= (frame & 7); - dwc2_sch_dbg(hsotg, - "QH=%p sched_p nxt=%04x, uf=%d\n", - qh, qh->next_active_frame, frame); - } - - if (status > 0) - status = 0; - } else { - status = dwc2_periodic_channel_available(hsotg); - if (status) { - dev_info(hsotg->dev, - "%s: No host channel available for periodic transfer\n", - __func__); - return status; - } - - status = dwc2_check_periodic_bandwidth(hsotg, qh); - } - - if (status) { - dev_dbg(hsotg->dev, - "%s: Insufficient periodic bandwidth for periodic transfer\n", - __func__); + status = dwc2_do_reserve(hsotg, qh); + if (status) return status; - } - - if (hsotg->core_params->uframe_sched <= 0) - /* Reserve periodic channel */ - hsotg->periodic_channels++; - - /* Update claimed usecs per (micro)frame */ - hsotg->periodic_usecs += qh->host_us; } qh->unreserve_pending = 0; @@ -450,7 +472,7 @@ static int dwc2_schedule_periodic(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) list_add_tail(&qh->qh_list_entry, &hsotg->periodic_sched_inactive); - return status; + return 0; } /** -- 2.7.0.rc3.207.g0ac5344
WARNING: multiple messages have this Message-ID (diff)
From: Douglas Anderson <dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org> To: John Youn <John.Youn-HKixBCOQz3hWk0Htik3J/w@public.gmane.org>, balbi-l0cyMroinI0@public.gmane.org, kever.yang-TNX95d0MmH7DzftRWevZcw@public.gmane.org Cc: gregory.herrero-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, "Heiko Stübner" <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>, johnyoun-HKixBCOQz3hWk0Htik3J/w@public.gmane.org, gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org, ming.lei-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org, linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, "Douglas Anderson" <dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, yousaf.kaukab-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org, "Julius Werner" <jwerner-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>, dinguyen-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org Subject: [PATCH v4 14/21] usb: dwc2: host: Split code out to make dwc2_do_reserve() Date: Wed, 20 Jan 2016 21:04:25 -0800 [thread overview] Message-ID: <1453352672-27890-15-git-send-email-dianders@chromium.org> (raw) In-Reply-To: <1453352672-27890-1-git-send-email-dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org> This no-op change splits code out of dwc2_schedule_periodic() into a dwc2_do_reserve() function. This makes it a little easier to follow the logic. Signed-off-by: Douglas Anderson <dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org> --- Changes in v4: - Split code out to make dwc2_do_reserve() new for v4. Changes in v3: None Changes in v2: None drivers/usb/dwc2/hcd_queue.c | 112 ++++++++++++++++++++++++++----------------- 1 file changed, 67 insertions(+), 45 deletions(-) diff --git a/drivers/usb/dwc2/hcd_queue.c b/drivers/usb/dwc2/hcd_queue.c index 8a2067bc1e62..9ce407e5017d 100644 --- a/drivers/usb/dwc2/hcd_queue.c +++ b/drivers/usb/dwc2/hcd_queue.c @@ -245,6 +245,70 @@ static int dwc2_find_uframe(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) } /** + * dwc2_do_reserve() - Make a periodic reservation + * + * Try to allocate space in the periodic schedule. Depending on parameters + * this might use the microframe scheduler or the dumb scheduler. + * + * @hsotg: The HCD state structure for the DWC OTG controller + * @qh: QH for the periodic transfer. + * + * Returns: 0 upon success; error upon failure. + */ +static int dwc2_do_reserve(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) +{ + int status; + + if (hsotg->core_params->uframe_sched > 0) { + int frame = -1; + + status = dwc2_find_uframe(hsotg, qh); + if (status == 0) + frame = 7; + else if (status > 0) + frame = status - 1; + + /* Set the new frame up */ + if (frame >= 0) { + qh->next_active_frame &= ~0x7; + qh->next_active_frame |= (frame & 7); + dwc2_sch_dbg(hsotg, + "QH=%p sched_p nxt=%04x, uf=%d\n", + qh, qh->next_active_frame, frame); + } + + if (status > 0) + status = 0; + } else { + status = dwc2_periodic_channel_available(hsotg); + if (status) { + dev_info(hsotg->dev, + "%s: No host channel available for periodic transfer\n", + __func__); + return status; + } + + status = dwc2_check_periodic_bandwidth(hsotg, qh); + } + + if (status) { + dev_dbg(hsotg->dev, + "%s: Insufficient periodic bandwidth for periodic transfer\n", + __func__); + return status; + } + + if (hsotg->core_params->uframe_sched <= 0) + /* Reserve periodic channel */ + hsotg->periodic_channels++; + + /* Update claimed usecs per (micro)frame */ + hsotg->periodic_usecs += qh->host_us; + + return 0; +} + +/** * dwc2_do_unreserve() - Actually release the periodic reservation * * This function actually releases the periodic bandwidth that was reserved @@ -393,51 +457,9 @@ static int dwc2_schedule_periodic(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) * that case. */ if (!qh->unreserve_pending) { - if (hsotg->core_params->uframe_sched > 0) { - int frame = -1; - - status = dwc2_find_uframe(hsotg, qh); - if (status == 0) - frame = 7; - else if (status > 0) - frame = status - 1; - - /* Set the new frame up */ - if (frame >= 0) { - qh->next_active_frame &= ~0x7; - qh->next_active_frame |= (frame & 7); - dwc2_sch_dbg(hsotg, - "QH=%p sched_p nxt=%04x, uf=%d\n", - qh, qh->next_active_frame, frame); - } - - if (status > 0) - status = 0; - } else { - status = dwc2_periodic_channel_available(hsotg); - if (status) { - dev_info(hsotg->dev, - "%s: No host channel available for periodic transfer\n", - __func__); - return status; - } - - status = dwc2_check_periodic_bandwidth(hsotg, qh); - } - - if (status) { - dev_dbg(hsotg->dev, - "%s: Insufficient periodic bandwidth for periodic transfer\n", - __func__); + status = dwc2_do_reserve(hsotg, qh); + if (status) return status; - } - - if (hsotg->core_params->uframe_sched <= 0) - /* Reserve periodic channel */ - hsotg->periodic_channels++; - - /* Update claimed usecs per (micro)frame */ - hsotg->periodic_usecs += qh->host_us; } qh->unreserve_pending = 0; @@ -450,7 +472,7 @@ static int dwc2_schedule_periodic(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) list_add_tail(&qh->qh_list_entry, &hsotg->periodic_sched_inactive); - return status; + return 0; } /** -- 2.7.0.rc3.207.g0ac5344
next prev parent reply other threads:[~2016-01-21 5:07 UTC|newest] Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-01-21 5:04 [PATCH v4 0/21] usb: dwc2: host: Fix and speed up all the stuff, especially with splits Douglas Anderson 2016-01-21 5:04 ` [PATCH v4 01/21] usb: dwc2: rockchip: Make the max_transfer_size automatic Douglas Anderson 2016-01-21 5:04 ` Douglas Anderson 2016-01-21 5:04 ` [PATCH v4 02/21] usb: dwc2: host: Get aligned DMA in a more supported way Douglas Anderson 2016-01-21 5:04 ` Douglas Anderson 2016-01-21 5:04 ` [PATCH v4 03/21] usb: dwc2: host: Set host_rx_fifo_size to 528 for rk3066 Douglas Anderson 2016-01-21 5:04 ` Douglas Anderson 2016-01-21 5:04 ` [PATCH v4 04/21] usb: dwc2: host: Set host_perio_tx_fifo_size to 304 " Douglas Anderson 2016-01-21 5:04 ` Douglas Anderson 2016-01-21 5:04 ` [PATCH v4 05/21] usb: dwc2: host: Avoid use of chan->qh after qh freed Douglas Anderson 2016-01-21 5:04 ` Douglas Anderson 2016-01-21 5:04 ` [PATCH v4 06/21] usb: dwc2: host: Always add to the tail of queues Douglas Anderson 2016-01-21 5:04 ` Douglas Anderson 2016-01-21 5:04 ` [PATCH v4 07/21] usb: dwc2: hcd: fix split transfer schedule sequence Douglas Anderson 2016-01-21 5:04 ` Douglas Anderson 2016-01-21 5:24 ` kbuild test robot 2016-01-21 5:24 ` kbuild test robot 2016-01-22 0:24 ` Doug Anderson 2016-01-21 5:04 ` [PATCH v4 08/21] usb: dwc2: host: Add scheduler tracing Douglas Anderson 2016-01-21 5:04 ` Douglas Anderson 2016-01-21 5:04 ` [PATCH v4 09/21] usb: dwc2: host: Add a delay before releasing periodic bandwidth Douglas Anderson 2016-01-21 5:04 ` Douglas Anderson 2016-01-21 5:04 ` [PATCH v4 10/21] usb: dwc2: host: Giveback URB in tasklet context Douglas Anderson 2016-01-21 5:04 ` Douglas Anderson 2016-01-21 5:04 ` [PATCH v4 11/21] usb: dwc2: host: Use periodic interrupt even with DMA Douglas Anderson 2016-01-21 5:04 ` Douglas Anderson 2016-01-21 5:04 ` [PATCH v4 12/21] usb: dwc2: host: Rename some fields in struct dwc2_qh Douglas Anderson 2016-01-21 5:04 ` Douglas Anderson 2016-01-21 5:04 ` [PATCH v4 13/21] usb: dwc2: host: Reorder things in hcd_queue.c Douglas Anderson 2016-01-21 5:04 ` Douglas Anderson 2016-01-21 5:04 ` Douglas Anderson [this message] 2016-01-21 5:04 ` [PATCH v4 14/21] usb: dwc2: host: Split code out to make dwc2_do_reserve() Douglas Anderson 2016-01-21 5:04 ` [PATCH v4 15/21] usb: dwc2: host: Add scheduler logging for missed SOFs Douglas Anderson 2016-01-21 5:04 ` Douglas Anderson 2016-01-21 5:04 ` [PATCH v4 16/21] usb: dwc2: host: Manage frame nums better in scheduler Douglas Anderson 2016-01-21 5:04 ` [PATCH v4 17/21] usb: dwc2: host: Schedule periodic right away if it's time Douglas Anderson 2016-01-21 5:04 ` Douglas Anderson 2016-01-21 5:04 ` [PATCH v4 18/21] usb: dwc2: host: Add dwc2_hcd_get_future_frame_number() call Douglas Anderson 2016-01-21 5:04 ` [PATCH v4 19/21] usb: dwc2: host: Properly set even/odd frame Douglas Anderson 2016-01-21 5:04 ` Douglas Anderson 2016-01-21 5:04 ` [PATCH v4 20/21] usb: dwc2: host: Totally redo the microframe scheduler Douglas Anderson 2016-01-21 5:04 ` Douglas Anderson 2016-01-21 5:49 ` kbuild test robot 2016-01-21 5:49 ` kbuild test robot 2016-01-21 5:04 ` [PATCH v4 21/21] usb: dwc2: host: If using uframe scheduler, end splits better Douglas Anderson 2016-01-21 5:04 ` Douglas Anderson
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