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-rw-r--r--drivers/usb/host/xhci-mem.c2
-rw-r--r--drivers/usb/host/xhci-ring.c90
-rw-r--r--drivers/usb/host/xhci.c5
-rw-r--r--drivers/usb/host/xhci.h3
4 files changed, 57 insertions, 43 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index a7716202a8dd..450adaca68ee 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -2533,7 +2533,7 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
if (xhci_add_interrupter(xhci, ir, 0))
goto fail;
- xhci->isoc_bei_interval = AVOID_BEI_INTERVAL_MAX;
+ ir->isoc_bei_interval = AVOID_BEI_INTERVAL_MAX;
/*
* XXX: Might need to set the Interrupter Moderation Register to
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 4f64b814d4aa..61bd29dd71a2 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -3022,9 +3022,6 @@ static int xhci_handle_event(struct xhci_hcd *xhci, struct xhci_interrupter *ir)
return 0;
}
- /* Update SW event ring dequeue pointer */
- inc_deq(xhci, ir->event_ring);
-
/* Are there more items on the event ring? Caller will call us again to
* check.
*/
@@ -3038,30 +3035,26 @@ static int xhci_handle_event(struct xhci_hcd *xhci, struct xhci_interrupter *ir)
*/
static void xhci_update_erst_dequeue(struct xhci_hcd *xhci,
struct xhci_interrupter *ir,
- union xhci_trb *event_ring_deq,
bool clear_ehb)
{
u64 temp_64;
dma_addr_t deq;
temp_64 = xhci_read_64(xhci, &ir->ir_set->erst_dequeue);
- /* If necessary, update the HW's version of the event ring deq ptr. */
- if (event_ring_deq != ir->event_ring->dequeue) {
- deq = xhci_trb_virt_to_dma(ir->event_ring->deq_seg,
- ir->event_ring->dequeue);
- if (deq == 0)
- xhci_warn(xhci, "WARN something wrong with SW event ring dequeue ptr\n");
- /*
- * Per 4.9.4, Software writes to the ERDP register shall
- * always advance the Event Ring Dequeue Pointer value.
- */
- if ((temp_64 & ERST_PTR_MASK) == (deq & ERST_PTR_MASK))
- return;
+ deq = xhci_trb_virt_to_dma(ir->event_ring->deq_seg,
+ ir->event_ring->dequeue);
+ if (deq == 0)
+ xhci_warn(xhci, "WARN something wrong with SW event ring dequeue ptr\n");
+ /*
+ * Per 4.9.4, Software writes to the ERDP register shall always advance
+ * the Event Ring Dequeue Pointer value.
+ */
+ if ((temp_64 & ERST_PTR_MASK) == (deq & ERST_PTR_MASK) && !clear_ehb)
+ return;
- /* Update HC event ring dequeue pointer */
- temp_64 = ir->event_ring->deq_seg->num & ERST_DESI_MASK;
- temp_64 |= deq & ERST_PTR_MASK;
- }
+ /* Update HC event ring dequeue pointer */
+ temp_64 = ir->event_ring->deq_seg->num & ERST_DESI_MASK;
+ temp_64 |= deq & ERST_PTR_MASK;
/* Clear the event handler busy flag (RW1C) */
if (clear_ehb)
@@ -3069,6 +3062,19 @@ static void xhci_update_erst_dequeue(struct xhci_hcd *xhci,
xhci_write_64(xhci, temp_64, &ir->ir_set->erst_dequeue);
}
+/* Clear the interrupt pending bit for a specific interrupter. */
+static void xhci_clear_interrupt_pending(struct xhci_hcd *xhci,
+ struct xhci_interrupter *ir)
+{
+ if (!ir->ip_autoclear) {
+ u32 irq_pending;
+
+ irq_pending = readl(&ir->ir_set->irq_pending);
+ irq_pending |= IMAN_IP;
+ writel(irq_pending, &ir->ir_set->irq_pending);
+ }
+}
+
/*
* xHCI spec says we can get an interrupt, and if the HC has an error condition,
* we might get bad data out of the event ring. Section 4.10.2.7 has a list of
@@ -3077,7 +3083,6 @@ static void xhci_update_erst_dequeue(struct xhci_hcd *xhci,
irqreturn_t xhci_irq(struct usb_hcd *hcd)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
- union xhci_trb *event_ring_deq;
struct xhci_interrupter *ir;
irqreturn_t ret = IRQ_NONE;
u64 temp_64;
@@ -3118,12 +3123,8 @@ irqreturn_t xhci_irq(struct usb_hcd *hcd)
/* This is the handler of the primary interrupter */
ir = xhci->interrupters[0];
- if (!hcd->msi_enabled) {
- u32 irq_pending;
- irq_pending = readl(&ir->ir_set->irq_pending);
- irq_pending |= IMAN_IP;
- writel(irq_pending, &ir->ir_set->irq_pending);
- }
+
+ xhci_clear_interrupt_pending(xhci, ir);
if (xhci->xhc_state & XHCI_STATE_DYING ||
xhci->xhc_state & XHCI_STATE_HALTED) {
@@ -3139,24 +3140,28 @@ irqreturn_t xhci_irq(struct usb_hcd *hcd)
goto out;
}
- event_ring_deq = ir->event_ring->dequeue;
/* FIXME this should be a delayed service routine
* that clears the EHB.
*/
while (xhci_handle_event(xhci, ir) > 0) {
- if (event_loop++ < TRBS_PER_SEGMENT / 2)
- continue;
- xhci_update_erst_dequeue(xhci, ir, event_ring_deq, false);
- event_ring_deq = ir->event_ring->dequeue;
+ /*
+ * If half a segment of events have been handled in one go then
+ * update ERDP, and force isoc trbs to interrupt more often
+ */
+ if (event_loop++ > TRBS_PER_SEGMENT / 2) {
+ xhci_update_erst_dequeue(xhci, ir, false);
- /* ring is half-full, force isoc trbs to interrupt more often */
- if (xhci->isoc_bei_interval > AVOID_BEI_INTERVAL_MIN)
- xhci->isoc_bei_interval = xhci->isoc_bei_interval / 2;
+ if (ir->isoc_bei_interval > AVOID_BEI_INTERVAL_MIN)
+ ir->isoc_bei_interval = ir->isoc_bei_interval / 2;
- event_loop = 0;
+ event_loop = 0;
+ }
+
+ /* Update SW event ring dequeue pointer */
+ inc_deq(xhci, ir->event_ring);
}
- xhci_update_erst_dequeue(xhci, ir, event_ring_deq, true);
+ xhci_update_erst_dequeue(xhci, ir, true);
ret = IRQ_HANDLED;
out:
@@ -4019,7 +4024,8 @@ static int xhci_get_isoc_frame_id(struct xhci_hcd *xhci,
}
/* Check if we should generate event interrupt for a TD in an isoc URB */
-static bool trb_block_event_intr(struct xhci_hcd *xhci, int num_tds, int i)
+static bool trb_block_event_intr(struct xhci_hcd *xhci, int num_tds, int i,
+ struct xhci_interrupter *ir)
{
if (xhci->hci_version < 0x100)
return false;
@@ -4030,8 +4036,8 @@ static bool trb_block_event_intr(struct xhci_hcd *xhci, int num_tds, int i)
* If AVOID_BEI is set the host handles full event rings poorly,
* generate an event at least every 8th TD to clear the event ring
*/
- if (i && xhci->quirks & XHCI_AVOID_BEI)
- return !!(i % xhci->isoc_bei_interval);
+ if (i && ir->isoc_bei_interval && xhci->quirks & XHCI_AVOID_BEI)
+ return !!(i % ir->isoc_bei_interval);
return true;
}
@@ -4040,6 +4046,7 @@ static bool trb_block_event_intr(struct xhci_hcd *xhci, int num_tds, int i)
static int xhci_queue_isoc_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
struct urb *urb, int slot_id, unsigned int ep_index)
{
+ struct xhci_interrupter *ir;
struct xhci_ring *ep_ring;
struct urb_priv *urb_priv;
struct xhci_td *td;
@@ -4057,6 +4064,7 @@ static int xhci_queue_isoc_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
xep = &xhci->devs[slot_id]->eps[ep_index];
ep_ring = xhci->devs[slot_id]->eps[ep_index].ring;
+ ir = xhci->interrupters[0];
num_tds = urb->number_of_packets;
if (num_tds < 1) {
@@ -4144,7 +4152,7 @@ static int xhci_queue_isoc_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
td->last_trb = ep_ring->enqueue;
td->last_trb_seg = ep_ring->enq_seg;
field |= TRB_IOC;
- if (trb_block_event_intr(xhci, num_tds, i))
+ if (trb_block_event_intr(xhci, num_tds, i, ir))
field |= TRB_BEI;
}
/* Calculate TRB length */
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index c057c42c36f4..afccd58c9a75 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -538,6 +538,9 @@ int xhci_run(struct usb_hcd *hcd)
*/
hcd->uses_new_polling = 1;
+ if (hcd->msi_enabled)
+ ir->ip_autoclear = true;
+
if (!usb_hcd_is_primary_hcd(hcd))
return xhci_run_finished(xhci);
@@ -1217,6 +1220,8 @@ static int xhci_map_temp_buffer(struct usb_hcd *hcd, struct urb *urb)
temp = kzalloc_node(buf_len, GFP_ATOMIC,
dev_to_node(hcd->self.sysdev));
+ if (!temp)
+ return -ENOMEM;
if (usb_urb_dir_out(urb))
sg_pcopy_to_buffer(urb->sg, urb->num_sgs,
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 6f82d404883f..bf05103aa68a 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1688,6 +1688,8 @@ struct xhci_interrupter {
struct xhci_erst erst;
struct xhci_intr_reg __iomem *ir_set;
unsigned int intr_num;
+ bool ip_autoclear;
+ u32 isoc_bei_interval;
/* For interrupter registers save and restore over suspend/resume */
u32 s3_irq_pending;
u32 s3_irq_control;
@@ -1760,7 +1762,6 @@ struct xhci_hcd {
u8 isoc_threshold;
/* imod_interval in ns (I * 250ns) */
u32 imod_interval;
- u32 isoc_bei_interval;
int event_ring_max;
/* 4KB min, 128MB max */
int page_size;
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-07-02 12:44:54 +0000