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-rw-r--r--drivers/usb/host/ohci-hcd.c12
-rw-r--r--drivers/usb/host/ohci-hub.c6
-rw-r--r--drivers/usb/host/ohci-q.c109
-rw-r--r--drivers/usb/host/ohci.h1
4 files changed, 70 insertions, 58 deletions
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 52829276a44e..3112799bba7f 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -780,24 +780,21 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
usb_hcd_resume_root_hub(hcd);
}
- if (ints & OHCI_INTR_WDH) {
- spin_lock (&ohci->lock);
- dl_done_list (ohci);
- spin_unlock (&ohci->lock);
- }
+ spin_lock(&ohci->lock);
+ if (ints & OHCI_INTR_WDH)
+ update_done_list(ohci);
/* could track INTR_SO to reduce available PCI/... bandwidth */
/* handle any pending URB/ED unlinks, leaving INTR_SF enabled
* when there's still unlinking to be done (next frame).
*/
- spin_lock (&ohci->lock);
+ process_done_list(ohci);
if (ohci->ed_rm_list)
finish_unlinks (ohci, ohci_frame_no(ohci));
if ((ints & OHCI_INTR_SF) != 0 && !ohci->ed_rm_list
&& ohci->rh_state == OHCI_RH_RUNNING)
ohci_writel (ohci, OHCI_INTR_SF, &regs->intrdisable);
- spin_unlock (&ohci->lock);
if (ohci->rh_state == OHCI_RH_RUNNING) {
ohci_writel (ohci, ints, &regs->intrstatus);
@@ -805,6 +802,7 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
// flush those writes
(void) ohci_readl (ohci, &ohci->regs->control);
}
+ spin_unlock(&ohci->lock);
return IRQ_HANDLED;
}
diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c
index b4940de1eba3..dccb90edd66e 100644
--- a/drivers/usb/host/ohci-hub.c
+++ b/drivers/usb/host/ohci-hub.c
@@ -39,7 +39,8 @@
#define OHCI_SCHED_ENABLES \
(OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE)
-static void dl_done_list (struct ohci_hcd *);
+static void update_done_list(struct ohci_hcd *);
+static void process_done_list(struct ohci_hcd *);
static void finish_unlinks (struct ohci_hcd *, u16);
#ifdef CONFIG_PM
@@ -87,7 +88,8 @@ __acquires(ohci->lock)
msleep (8);
spin_lock_irq (&ohci->lock);
}
- dl_done_list (ohci);
+ update_done_list(ohci);
+ process_done_list(ohci);
finish_unlinks (ohci, ohci_frame_no(ohci));
/*
diff --git a/drivers/usb/host/ohci-q.c b/drivers/usb/host/ohci-q.c
index a9f4f04c3fad..f36b2fa0ee2f 100644
--- a/drivers/usb/host/ohci-q.c
+++ b/drivers/usb/host/ohci-q.c
@@ -892,13 +892,41 @@ static void ed_halted(struct ohci_hcd *ohci, struct td *td, int cc)
}
}
-/* replies to the request have to be on a FIFO basis so
- * we unreverse the hc-reversed done-list
- */
-static struct td *dl_reverse_done_list (struct ohci_hcd *ohci)
+/* Add a TD to the done list */
+static void add_to_done_list(struct ohci_hcd *ohci, struct td *td)
+{
+ struct td *td2, *td_prev;
+ struct ed *ed;
+
+ if (td->next_dl_td)
+ return; /* Already on the list */
+
+ /* Add all the TDs going back until we reach one that's on the list */
+ ed = td->ed;
+ td2 = td_prev = td;
+ list_for_each_entry_continue_reverse(td2, &ed->td_list, td_list) {
+ if (td2->next_dl_td)
+ break;
+ td2->next_dl_td = td_prev;
+ td_prev = td2;
+ }
+
+ if (ohci->dl_end)
+ ohci->dl_end->next_dl_td = td_prev;
+ else
+ ohci->dl_start = td_prev;
+
+ /*
+ * Make td->next_dl_td point to td itself, to mark the fact
+ * that td is on the done list.
+ */
+ ohci->dl_end = td->next_dl_td = td;
+}
+
+/* Get the entries on the hardware done queue and put them on our list */
+static void update_done_list(struct ohci_hcd *ohci)
{
u32 td_dma;
- struct td *td_rev = NULL;
struct td *td = NULL;
td_dma = hc32_to_cpup (ohci, &ohci->hcca->done_head);
@@ -906,7 +934,7 @@ static struct td *dl_reverse_done_list (struct ohci_hcd *ohci)
wmb();
/* get TD from hc's singly linked list, and
- * prepend to ours. ed->td_list changes later.
+ * add to ours. ed->td_list changes later.
*/
while (td_dma) {
int cc;
@@ -928,11 +956,9 @@ static struct td *dl_reverse_done_list (struct ohci_hcd *ohci)
&& (td->ed->hwHeadP & cpu_to_hc32 (ohci, ED_H)))
ed_halted(ohci, td, cc);
- td->next_dl_td = td_rev;
- td_rev = td;
td_dma = hc32_to_cpup (ohci, &td->hwNextTD);
+ add_to_done_list(ohci, td);
}
- return td_rev;
}
/*-------------------------------------------------------------------------*/
@@ -956,26 +982,27 @@ rescan_all:
/* only take off EDs that the HC isn't using, accounting for
* frame counter wraps and EDs with partially retired TDs
*/
- if (likely(ohci->rh_state == OHCI_RH_RUNNING)) {
- if (tick_before (tick, ed->tick)) {
+ if (likely(ohci->rh_state == OHCI_RH_RUNNING) &&
+ tick_before(tick, ed->tick)) {
skip_ed:
- last = &ed->ed_next;
- continue;
- }
+ last = &ed->ed_next;
+ continue;
+ }
+ if (!list_empty(&ed->td_list)) {
+ struct td *td;
+ u32 head;
- if (!list_empty (&ed->td_list)) {
- struct td *td;
- u32 head;
+ td = list_first_entry(&ed->td_list, struct td, td_list);
- td = list_entry (ed->td_list.next, struct td,
- td_list);
- head = hc32_to_cpu (ohci, ed->hwHeadP) &
- TD_MASK;
+ /* INTR_WDH may need to clean up first */
+ head = hc32_to_cpu(ohci, ed->hwHeadP) & TD_MASK;
+ if (td->td_dma != head &&
+ ohci->rh_state == OHCI_RH_RUNNING)
+ goto skip_ed;
- /* INTR_WDH may need to clean up first */
- if (td->td_dma != head)
- goto skip_ed;
- }
+ /* Don't mess up anything already on the done list */
+ if (td->next_dl_td)
+ goto skip_ed;
}
/* ED's now officially unlinked, hc doesn't see */
@@ -1161,33 +1188,17 @@ static void takeback_td(struct ohci_hcd *ohci, struct td *td)
* normal path is finish_unlinks(), which unlinks URBs using ed_rm_list,
* instead of scanning the (re-reversed) donelist as this does.
*/
-static void
-dl_done_list (struct ohci_hcd *ohci)
+static void process_done_list(struct ohci_hcd *ohci)
{
- struct td *td = dl_reverse_done_list (ohci);
-
- while (td) {
- struct td *td_next = td->next_dl_td;
- struct ed *ed = td->ed;
+ struct td *td;
- /*
- * Some OHCI controllers (NVIDIA for sure, maybe others)
- * occasionally forget to add TDs to the done queue. Since
- * TDs for a given endpoint are always processed in order,
- * if we find a TD on the donelist then all of its
- * predecessors must be finished as well.
- */
- for (;;) {
- struct td *td2;
-
- td2 = list_first_entry(&ed->td_list, struct td,
- td_list);
- if (td2 == td)
- break;
- takeback_td(ohci, td2);
- }
+ while (ohci->dl_start) {
+ td = ohci->dl_start;
+ if (td == ohci->dl_end)
+ ohci->dl_start = ohci->dl_end = NULL;
+ else
+ ohci->dl_start = td->next_dl_td;
takeback_td(ohci, td);
- td = td_next;
}
}
diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h
index 392932dd6318..a8259bc6fd8b 100644
--- a/drivers/usb/host/ohci.h
+++ b/drivers/usb/host/ohci.h
@@ -380,6 +380,7 @@ struct ohci_hcd {
struct dma_pool *td_cache;
struct dma_pool *ed_cache;
struct td *td_hash [TD_HASH_SIZE];
+ struct td *dl_start, *dl_end; /* the done list */
struct list_head pending;
/*
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-16 09:14:36 +0000