diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0788-dwc_otg-fiq_fsm-pause-when-cancelling-split-transact.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0788-dwc_otg-fiq_fsm-pause-when-cancelling-split-transact.patch | 95 |
1 files changed, 0 insertions, 95 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0788-dwc_otg-fiq_fsm-pause-when-cancelling-split-transact.patch b/target/linux/bcm27xx/patches-4.19/950-0788-dwc_otg-fiq_fsm-pause-when-cancelling-split-transact.patch deleted file mode 100644 index 53c93a5836..0000000000 --- a/target/linux/bcm27xx/patches-4.19/950-0788-dwc_otg-fiq_fsm-pause-when-cancelling-split-transact.patch +++ /dev/null @@ -1,95 +0,0 @@ -From af6743f045159970b95f6426de13c0fb82678e67 Mon Sep 17 00:00:00 2001 -From: Jonathan Bell <jonathan@raspberrypi.org> -Date: Wed, 8 Jan 2020 12:48:09 +0000 -Subject: [PATCH] dwc_otg: fiq_fsm: pause when cancelling split - transactions - -Non-periodic splits will DMA to/from the driver-provided transfer_buffer, -which may be freed immediately after the dequeue call returns. Block until -we know the transfer is complete. - -A similar delay is needed when cleaning up disconnects, as the FIQ could -have started a periodic transfer in the previous microframe to the one -that triggered a disconnect. - -Signed-off-by: Jonathan Bell <jonathan@raspberrypi.org> ---- - drivers/usb/host/dwc_otg/dwc_otg_hcd.c | 33 +++++++++++++++++++++-- - drivers/usb/host/dwc_otg/dwc_otg_os_dep.h | 1 + - 2 files changed, 32 insertions(+), 2 deletions(-) - ---- a/drivers/usb/host/dwc_otg/dwc_otg_hcd.c -+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd.c -@@ -175,6 +175,7 @@ static void kill_urbs_in_qh_list(dwc_otg - dwc_list_link_t *qh_item, *qh_tmp; - dwc_otg_qh_t *qh; - dwc_otg_qtd_t *qtd, *qtd_tmp; -+ int quiesced = 0; - - DWC_LIST_FOREACH_SAFE(qh_item, qh_tmp, qh_list) { - qh = DWC_LIST_ENTRY(qh_item, dwc_otg_qh_t, qh_list_entry); -@@ -198,8 +199,17 @@ static void kill_urbs_in_qh_list(dwc_otg - qh->channel->halt_status = DWC_OTG_HC_XFER_URB_DEQUEUE; - qh->channel->halt_pending = 1; - if (hcd->fiq_state->channel[n].fsm == FIQ_HS_ISOC_TURBO || -- hcd->fiq_state->channel[n].fsm == FIQ_HS_ISOC_SLEEPING) -+ hcd->fiq_state->channel[n].fsm == FIQ_HS_ISOC_SLEEPING) - hcd->fiq_state->channel[n].fsm = FIQ_HS_ISOC_ABORTED; -+ /* We're called from disconnect callback or in the middle of freeing the HCD here, -+ * so FIQ is disabled, top-level interrupts masked and we're holding the spinlock. -+ * No further URBs will be submitted, but wait 1 microframe for any previously -+ * submitted periodic DMA to finish. -+ */ -+ if (!quiesced) { -+ udelay(125); -+ quiesced = 1; -+ } - } else { - dwc_otg_hc_halt(hcd->core_if, qh->channel, - DWC_OTG_HC_XFER_URB_DEQUEUE); -@@ -600,15 +610,34 @@ int dwc_otg_hcd_urb_dequeue(dwc_otg_hcd_ - /* In FIQ FSM mode, we need to shut down carefully. - * The FIQ may attempt to restart a disabled channel */ - if (fiq_fsm_enable && (hcd->fiq_state->channel[n].fsm != FIQ_PASSTHROUGH)) { -+ int retries = 3; -+ int running = 0; -+ enum fiq_fsm_state state; -+ - local_fiq_disable(); - fiq_fsm_spin_lock(&hcd->fiq_state->lock); - qh->channel->halt_status = DWC_OTG_HC_XFER_URB_DEQUEUE; - qh->channel->halt_pending = 1; - if (hcd->fiq_state->channel[n].fsm == FIQ_HS_ISOC_TURBO || -- hcd->fiq_state->channel[n].fsm == FIQ_HS_ISOC_SLEEPING) -+ hcd->fiq_state->channel[n].fsm == FIQ_HS_ISOC_SLEEPING) - hcd->fiq_state->channel[n].fsm = FIQ_HS_ISOC_ABORTED; - fiq_fsm_spin_unlock(&hcd->fiq_state->lock); - local_fiq_enable(); -+ -+ if (dwc_qh_is_non_per(qh)) { -+ do { -+ state = READ_ONCE(hcd->fiq_state->channel[n].fsm); -+ running = (state != FIQ_NP_SPLIT_DONE) && -+ (state != FIQ_NP_SPLIT_LS_ABORTED) && -+ (state != FIQ_NP_SPLIT_HS_ABORTED); -+ if (!running) -+ break; -+ udelay(125); -+ } while(--retries); -+ if (!retries) -+ DWC_WARN("Timed out waiting for FSM NP transfer to complete on %d", -+ qh->channel->hc_num); -+ } - } else { - dwc_otg_hc_halt(hcd->core_if, qh->channel, - DWC_OTG_HC_XFER_URB_DEQUEUE); ---- a/drivers/usb/host/dwc_otg/dwc_otg_os_dep.h -+++ b/drivers/usb/host/dwc_otg/dwc_otg_os_dep.h -@@ -27,6 +27,7 @@ - #include <linux/workqueue.h> - #include <linux/stat.h> - #include <linux/pci.h> -+#include <linux/compiler.h> - - #include <linux/version.h> - |