[PATCH 2/2] USB: xhci: move all debug code underCONFIG_XHCI_HCD_DEBUGGING

From: Alex Chiang
Date: Tue Mar 09 2010 - 12:53:17 EST

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As per $subject, only build (and run) xhci debug code when the user
wants it.

Signed-off-by: Alex Chiang <achiang@xxxxxx>
---

drivers/usb/host/Makefile | 5 ++-
drivers/usb/host/xhci-dbg.c | 76 ++++++++++++++++++++++++++++++++++++++++++
drivers/usb/host/xhci.c | 78 ++-----------------------------------------
drivers/usb/host/xhci.h | 19 ++++++++++
4 files changed, 103 insertions(+), 75 deletions(-)

diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index af25ace..2af3351 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -12,7 +12,10 @@ fhci-objs := fhci-hcd.o fhci-hub.o fhci-q.o fhci-mem.o \
ifeq ($(CONFIG_FHCI_DEBUG),y)
fhci-objs += fhci-dbg.o
endif
-xhci-hcd-objs := xhci.o xhci-mem.o xhci-pci.o xhci-ring.o xhci-hub.o xhci-dbg.o
+xhci-hcd-objs := xhci.o xhci-mem.o xhci-pci.o xhci-ring.o xhci-hub.o
+ifeq ($(CONFIG_XHCI_HCD_DEBUGGING),y)
+xhci-hcd-objs += xhci-dbg.o
+endif

obj-$(CONFIG_USB_WHCI_HCD) += whci/

diff --git a/drivers/usb/host/xhci-dbg.c b/drivers/usb/host/xhci-dbg.c
index 33128d5..6ae5cd6 100644
--- a/drivers/usb/host/xhci-dbg.c
+++ b/drivers/usb/host/xhci-dbg.c
@@ -529,3 +529,79 @@ void xhci_dbg_ctx(struct xhci_hcd *xhci,
xhci_dbg_slot_ctx(xhci, ctx);
xhci_dbg_ep_ctx(xhci, ctx, last_ep);
}
+
+static void xhci_dbg_event_ring_work(unsigned long arg)
+{
+ unsigned long flags;
+ int temp;
+ u64 temp_64;
+ struct xhci_hcd *xhci = (struct xhci_hcd *) arg;
+ int i, j;
+
+ xhci_dbg(xhci, "Poll event ring: %lu\n", jiffies);
+
+ spin_lock_irqsave(&xhci->lock, flags);
+ temp = xhci_readl(xhci, &xhci->op_regs->status);
+ xhci_dbg(xhci, "op reg status = 0x%x\n", temp);
+ if (temp == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING)) {
+ xhci_dbg(xhci, "HW died, polling stopped.\n");
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ return;
+ }
+
+ temp = xhci_readl(xhci, &xhci->ir_set->irq_pending);
+ xhci_dbg(xhci, "ir_set 0 pending = 0x%x\n", temp);
+ xhci_dbg(xhci, "No-op commands handled = %d\n", xhci->noops_handled);
+ xhci_dbg(xhci, "HC error bitmask = 0x%x\n", xhci->error_bitmask);
+ xhci->error_bitmask = 0;
+ xhci_dbg(xhci, "Event ring:\n");
+ xhci_debug_segment(xhci, xhci->event_ring->deq_seg);
+ xhci_dbg_ring_ptrs(xhci, xhci->event_ring);
+ temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue);
+ temp_64 &= ~ERST_PTR_MASK;
+ xhci_dbg(xhci, "ERST deq = 64'h%0lx\n", (long unsigned int) temp_64);
+ xhci_dbg(xhci, "Command ring:\n");
+ xhci_debug_segment(xhci, xhci->cmd_ring->deq_seg);
+ xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring);
+ xhci_dbg_cmd_ptrs(xhci);
+ for (i = 0; i < MAX_HC_SLOTS; ++i) {
+ if (!xhci->devs[i])
+ continue;
+ for (j = 0; j < 31; ++j) {
+ struct xhci_ring *ring = xhci->devs[i]->eps[j].ring;
+ if (!ring)
+ continue;
+ xhci_dbg(xhci, "Dev %d endpoint ring %d:\n", i, j);
+ xhci_debug_segment(xhci, ring->deq_seg);
+ }
+ }
+
+ if (xhci->noops_submitted != NUM_TEST_NOOPS)
+ if (xhci_setup_one_noop(xhci))
+ xhci_ring_cmd_db(xhci);
+ spin_unlock_irqrestore(&xhci->lock, flags);
+
+ if (!xhci->zombie)
+ mod_timer(&xhci->event_ring_timer, jiffies + POLL_TIMEOUT * HZ);
+ else
+ xhci_dbg(xhci, "Quit polling the event ring.\n");
+}
+
+void xhci_dbg_init_ring_polling(struct xhci_hcd *xhci)
+{
+ init_timer(&xhci->event_ring_timer);
+ xhci->event_ring_timer.data = (unsigned long) xhci;
+ xhci->event_ring_timer.function = xhci_dbg_event_ring_work;
+ /* Poll the event ring */
+ xhci->event_ring_timer.expires = jiffies + POLL_TIMEOUT * HZ;
+ xhci->zombie = 0;
+ xhci_dbg(xhci, "Setting event ring polling timer\n");
+ add_timer(&xhci->event_ring_timer);
+}
+
+void xhci_dbg_stop_ring_polling(struct xhci_hcd *xhci)
+{
+ /* Tell the event ring poll function not to reschedule */
+ xhci->zombie = 1;
+ del_timer_sync(&xhci->event_ring_timer);
+}
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 5e92c72..89474b2 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -312,65 +312,6 @@ hw_died:
return IRQ_HANDLED;
}

-#ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
-void xhci_event_ring_work(unsigned long arg)
-{
- unsigned long flags;
- int temp;
- u64 temp_64;
- struct xhci_hcd *xhci = (struct xhci_hcd *) arg;
- int i, j;
-
- xhci_dbg(xhci, "Poll event ring: %lu\n", jiffies);
-
- spin_lock_irqsave(&xhci->lock, flags);
- temp = xhci_readl(xhci, &xhci->op_regs->status);
- xhci_dbg(xhci, "op reg status = 0x%x\n", temp);
- if (temp == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING)) {
- xhci_dbg(xhci, "HW died, polling stopped.\n");
- spin_unlock_irqrestore(&xhci->lock, flags);
- return;
- }
-
- temp = xhci_readl(xhci, &xhci->ir_set->irq_pending);
- xhci_dbg(xhci, "ir_set 0 pending = 0x%x\n", temp);
- xhci_dbg(xhci, "No-op commands handled = %d\n", xhci->noops_handled);
- xhci_dbg(xhci, "HC error bitmask = 0x%x\n", xhci->error_bitmask);
- xhci->error_bitmask = 0;
- xhci_dbg(xhci, "Event ring:\n");
- xhci_debug_segment(xhci, xhci->event_ring->deq_seg);
- xhci_dbg_ring_ptrs(xhci, xhci->event_ring);
- temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue);
- temp_64 &= ~ERST_PTR_MASK;
- xhci_dbg(xhci, "ERST deq = 64'h%0lx\n", (long unsigned int) temp_64);
- xhci_dbg(xhci, "Command ring:\n");
- xhci_debug_segment(xhci, xhci->cmd_ring->deq_seg);
- xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring);
- xhci_dbg_cmd_ptrs(xhci);
- for (i = 0; i < MAX_HC_SLOTS; ++i) {
- if (!xhci->devs[i])
- continue;
- for (j = 0; j < 31; ++j) {
- struct xhci_ring *ring = xhci->devs[i]->eps[j].ring;
- if (!ring)
- continue;
- xhci_dbg(xhci, "Dev %d endpoint ring %d:\n", i, j);
- xhci_debug_segment(xhci, ring->deq_seg);
- }
- }
-
- if (xhci->noops_submitted != NUM_TEST_NOOPS)
- if (xhci_setup_one_noop(xhci))
- xhci_ring_cmd_db(xhci);
- spin_unlock_irqrestore(&xhci->lock, flags);
-
- if (!xhci->zombie)
- mod_timer(&xhci->event_ring_timer, jiffies + POLL_TIMEOUT * HZ);
- else
- xhci_dbg(xhci, "Quit polling the event ring.\n");
-}
-#endif
-
/*
* Start the HC after it was halted.
*
@@ -402,16 +343,8 @@ int xhci_run(struct usb_hcd *hcd)

return -ENOSYS;
#endif
-#ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
- init_timer(&xhci->event_ring_timer);
- xhci->event_ring_timer.data = (unsigned long) xhci;
- xhci->event_ring_timer.function = xhci_event_ring_work;
- /* Poll the event ring */
- xhci->event_ring_timer.expires = jiffies + POLL_TIMEOUT * HZ;
- xhci->zombie = 0;
- xhci_dbg(xhci, "Setting event ring polling timer\n");
- add_timer(&xhci->event_ring_timer);
-#endif
+
+ xhci_dbg_init_ring_polling(xhci);

xhci_dbg(xhci, "Command ring memory map follows:\n");
xhci_debug_ring(xhci, xhci->cmd_ring);
@@ -488,11 +421,8 @@ void xhci_stop(struct usb_hcd *hcd)
#if 0 /* No MSI yet */
xhci_cleanup_msix(xhci);
#endif
-#ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
- /* Tell the event ring poll function not to reschedule */
- xhci->zombie = 1;
- del_timer_sync(&xhci->event_ring_timer);
-#endif
+
+ xhci_dbg_stop_ring_polling(xhci);

xhci_dbg(xhci, "// Disabling event ring interrupts\n");
temp = xhci_readl(xhci, &xhci->op_regs->status);
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 8778135..8d39f88 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1198,6 +1198,7 @@ static inline int xhci_link_trb_quirk(struct xhci_hcd *xhci)
}

/* xHCI debugging */
+#ifdef CONFIG_USB_XHCI_DEBUGGING
void xhci_print_ir_set(struct xhci_hcd *xhci, struct xhci_intr_reg *ir_set, int set_num);
void xhci_print_registers(struct xhci_hcd *xhci);
void xhci_dbg_regs(struct xhci_hcd *xhci);
@@ -1210,6 +1211,24 @@ void xhci_dbg_erst(struct xhci_hcd *xhci, struct xhci_erst *erst);
void xhci_dbg_cmd_ptrs(struct xhci_hcd *xhci);
void xhci_dbg_ring_ptrs(struct xhci_hcd *xhci, struct xhci_ring *ring);
void xhci_dbg_ctx(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx, unsigned int last_ep);
+void xhci_dbg_init_ring_polling(struct xhci_hcd *xhci);
+void xhci_dbg_stop_ring_polling(struct xhci_hcd *xhci);
+#else
+static inline void xhci_print_ir_set(struct xhci_hcd *xhci, struct xhci_intr_reg *ir_set, int set_num) { }
+static inline void xhci_print_registers(struct xhci_hcd *xhci) { }
+static inline void xhci_dbg_regs(struct xhci_hcd *xhci) { }
+static inline void xhci_print_run_regs(struct xhci_hcd *xhci) { }
+static inline void xhci_print_trb_offsets(struct xhci_hcd *xhci, union xhci_trb *trb) { }
+static inline void xhci_debug_trb(struct xhci_hcd *xhci, union xhci_trb *trb) { }
+static inline void xhci_debug_segment(struct xhci_hcd *xhci, struct xhci_segment *seg) { }
+static inline void xhci_debug_ring(struct xhci_hcd *xhci, struct xhci_ring *ring) { }
+static inline void xhci_dbg_erst(struct xhci_hcd *xhci, struct xhci_erst *erst) { }
+static inline void xhci_dbg_cmd_ptrs(struct xhci_hcd *xhci) { }
+static inline void xhci_dbg_ring_ptrs(struct xhci_hcd *xhci, struct xhci_ring *ring) { }
+static inline void xhci_dbg_ctx(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx, unsigned int last_ep) { }
+static inline void xhci_dbg_init_ring_polling(struct xhci_hcd *xhci) { }
+static inline void xhci_dbg_stop_ring_polling(struct xhci_hcd *xhci) { }
+#endif

/* xHCI memory management */
void xhci_mem_cleanup(struct xhci_hcd *xhci);

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Next message: Dmitry Torokhov: "Re: [git pull] Input updates for 2.6.34-rc0"
Previous message: Alex Chiang: "[PATCH 1/2] USB: xhci: rename driver to xhci_hcd"
In reply to: Alex Chiang: "[PATCH 1/2] USB: xhci: rename driver to xhci_hcd"
Next in thread: Greg KH: "Re: [PATCH 0/2] small xhci cleanups"
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