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7d7aa2fd92
This change makes the names of Broadcom targets consistent by using the common notation based on SoC/CPU ID (which is used internally anyway), bcmXXXX instead of brcmXXXX. This is even used for target TITLE in make menuconfig already, only the short target name used brcm so far. Despite, since subtargets range from bcm2708 to bcm2711, it seems appropriate to use bcm27xx instead of bcm2708 (again, as already done for BOARDNAME). This also renames the packages brcm2708-userland and brcm2708-gpu-fw. Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de> Acked-by: Álvaro Fernández Rojas <noltari@gmail.com>
96 lines
3.6 KiB
Diff
96 lines
3.6 KiB
Diff
From af6743f045159970b95f6426de13c0fb82678e67 Mon Sep 17 00:00:00 2001
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From: Jonathan Bell <jonathan@raspberrypi.org>
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Date: Wed, 8 Jan 2020 12:48:09 +0000
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Subject: [PATCH] dwc_otg: fiq_fsm: pause when cancelling split
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transactions
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Non-periodic splits will DMA to/from the driver-provided transfer_buffer,
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which may be freed immediately after the dequeue call returns. Block until
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we know the transfer is complete.
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A similar delay is needed when cleaning up disconnects, as the FIQ could
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have started a periodic transfer in the previous microframe to the one
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that triggered a disconnect.
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Signed-off-by: Jonathan Bell <jonathan@raspberrypi.org>
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---
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drivers/usb/host/dwc_otg/dwc_otg_hcd.c | 33 +++++++++++++++++++++--
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drivers/usb/host/dwc_otg/dwc_otg_os_dep.h | 1 +
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2 files changed, 32 insertions(+), 2 deletions(-)
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--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd.c
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+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd.c
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@@ -175,6 +175,7 @@ static void kill_urbs_in_qh_list(dwc_otg
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dwc_list_link_t *qh_item, *qh_tmp;
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dwc_otg_qh_t *qh;
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dwc_otg_qtd_t *qtd, *qtd_tmp;
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+ int quiesced = 0;
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DWC_LIST_FOREACH_SAFE(qh_item, qh_tmp, qh_list) {
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qh = DWC_LIST_ENTRY(qh_item, dwc_otg_qh_t, qh_list_entry);
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@@ -198,8 +199,17 @@ static void kill_urbs_in_qh_list(dwc_otg
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qh->channel->halt_status = DWC_OTG_HC_XFER_URB_DEQUEUE;
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qh->channel->halt_pending = 1;
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if (hcd->fiq_state->channel[n].fsm == FIQ_HS_ISOC_TURBO ||
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- hcd->fiq_state->channel[n].fsm == FIQ_HS_ISOC_SLEEPING)
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+ hcd->fiq_state->channel[n].fsm == FIQ_HS_ISOC_SLEEPING)
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hcd->fiq_state->channel[n].fsm = FIQ_HS_ISOC_ABORTED;
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+ /* We're called from disconnect callback or in the middle of freeing the HCD here,
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+ * so FIQ is disabled, top-level interrupts masked and we're holding the spinlock.
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+ * No further URBs will be submitted, but wait 1 microframe for any previously
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+ * submitted periodic DMA to finish.
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+ */
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+ if (!quiesced) {
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+ udelay(125);
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+ quiesced = 1;
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+ }
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} else {
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dwc_otg_hc_halt(hcd->core_if, qh->channel,
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DWC_OTG_HC_XFER_URB_DEQUEUE);
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@@ -600,15 +610,34 @@ int dwc_otg_hcd_urb_dequeue(dwc_otg_hcd_
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/* In FIQ FSM mode, we need to shut down carefully.
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* The FIQ may attempt to restart a disabled channel */
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if (fiq_fsm_enable && (hcd->fiq_state->channel[n].fsm != FIQ_PASSTHROUGH)) {
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+ int retries = 3;
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+ int running = 0;
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+ enum fiq_fsm_state state;
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+
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local_fiq_disable();
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fiq_fsm_spin_lock(&hcd->fiq_state->lock);
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qh->channel->halt_status = DWC_OTG_HC_XFER_URB_DEQUEUE;
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qh->channel->halt_pending = 1;
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if (hcd->fiq_state->channel[n].fsm == FIQ_HS_ISOC_TURBO ||
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- hcd->fiq_state->channel[n].fsm == FIQ_HS_ISOC_SLEEPING)
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+ hcd->fiq_state->channel[n].fsm == FIQ_HS_ISOC_SLEEPING)
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hcd->fiq_state->channel[n].fsm = FIQ_HS_ISOC_ABORTED;
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fiq_fsm_spin_unlock(&hcd->fiq_state->lock);
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local_fiq_enable();
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+
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+ if (dwc_qh_is_non_per(qh)) {
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+ do {
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+ state = READ_ONCE(hcd->fiq_state->channel[n].fsm);
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+ running = (state != FIQ_NP_SPLIT_DONE) &&
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+ (state != FIQ_NP_SPLIT_LS_ABORTED) &&
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+ (state != FIQ_NP_SPLIT_HS_ABORTED);
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+ if (!running)
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+ break;
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+ udelay(125);
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+ } while(--retries);
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+ if (!retries)
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+ DWC_WARN("Timed out waiting for FSM NP transfer to complete on %d",
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+ qh->channel->hc_num);
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+ }
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} else {
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dwc_otg_hc_halt(hcd->core_if, qh->channel,
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DWC_OTG_HC_XFER_URB_DEQUEUE);
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--- a/drivers/usb/host/dwc_otg/dwc_otg_os_dep.h
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+++ b/drivers/usb/host/dwc_otg/dwc_otg_os_dep.h
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@@ -27,6 +27,7 @@
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#include <linux/workqueue.h>
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#include <linux/stat.h>
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#include <linux/pci.h>
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+#include <linux/compiler.h>
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#include <linux/version.h>
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