Am Dienstag, 15. Mai 2007 16:37 schrieb Alan Stern:
> Can you break this up into two patches? If the first adds the queuing
> code and the second adds autosuspend support, it will be much easier to
> appraise and test them.
Hi,
this code implements delayed execution of output requests arriving
for suspended HID devices.
Regards
Oliver
--
--- linux-2.6.22-rc1/include/linux/hid.h 2007-05-15 19:12:37.000000000
+0200
+++ linux-2.6.22-rc1-autosuspend/include/linux/hid.h 2007-05-15
10:03:12.000000000 +0200
@@ -401,6 +401,7 @@ struct hid_control_fifo {
#define HID_RESET_PENDING 4
#define HID_SUSPENDED 5
#define HID_CLEAR_HALT 6
+#define HID_REPORTED_IDLE 7
struct hid_input {
struct list_head list;
--- linux-2.6.22-rc1/drivers/hid/usbhid/usbhid.h 2007-05-15
19:12:37.000000000 +0200
+++ linux-2.6.22-rc1-autosuspend/drivers/hid/usbhid/usbhid.h 2007-05-15
13:49:14.000000000 +0200
@@ -63,21 +63,23 @@ struct usbhid_device {
unsigned char ctrlhead, ctrltail; /*
Control fifo head & tail */
char *ctrlbuf; /*
Control buffer */
dma_addr_t ctrlbuf_dma; /*
Control buffer dma */
- spinlock_t ctrllock; /*
Control fifo spinlock */
struct urb *urbout; /*
Output URB */
struct hid_report *out[HID_CONTROL_FIFO_SIZE]; /*
Output pipe fifo */
unsigned char outhead, outtail; /*
Output pipe fifo head & tail */
char *outbuf; /*
Output buffer */
dma_addr_t outbuf_dma; /*
Output buffer dma */
- spinlock_t outlock; /*
Output fifo spinlock */
- unsigned long iofl; /* I/O
flags (CTRL_RUNNING, OUT_RUNNING) */
- struct timer_list io_retry; /*
Retry timer */
- unsigned long stop_retry; /* Time
to give up, in jiffies */
- unsigned int retry_delay; /*
Delay length in ms */
- struct work_struct reset_work; /* Task
context for resets */
+ spinlock_t outputlock; /*
Output fifo spinlock */
+ unsigned long iofl; /* I/O
flags (CTRL_RUNNING, OUT_RUNNING) */
+ struct timer_list io_retry; /*
Retry timer */
+ struct timer_list idle_timer; /*
timer to determine idleness */
+ unsigned long stop_retry; /* Time
to give up, in jiffies */
+ unsigned int retry_delay; /*
Delay length in ms */
+ struct work_struct reset_work; /* Task
context for resets */
+ struct work_struct idle_work; /* Task
context for reporting idleness */
+ struct work_struct restart_work; /*
waking up for output to be done in task context */
};
#define hid_to_usb_dev(hid_dev) \
--- linux-2.6.22-rc1/drivers/hid/usbhid/hid-core.c 2007-05-15
19:12:37.000000000 +0200
+++ linux-2.6.22-rc1-autosuspend/drivers/hid/usbhid/hid-core.c 2007-05-15
21:09:26.000000000 +0200
@@ -5,6 +5,7 @@
* Copyright (c) 2000-2005 Vojtech Pavlik <[EMAIL PROTECTED]>
* Copyright (c) 2005 Michael Haboustak <[EMAIL PROTECTED]> for Concept2, Inc
* Copyright (c) 2006-2007 Jiri Kosina
+ * Copyright (c) 2007 Oliver Neukum
*/
/*
@@ -63,8 +64,9 @@ MODULE_PARM_DESC(quirks, "Add/modify USB
/*
* Input submission and I/O error handler.
*/
-
static void hid_io_error(struct hid_device *hid);
+static int hid_submit_out(struct hid_device *hid);
+static int hid_submit_ctrl(struct hid_device *hid);
/* Start up the input URB */
static int hid_start_in(struct hid_device *hid)
@@ -74,7 +76,7 @@ static int hid_start_in(struct hid_devic
struct usbhid_device *usbhid = hid->driver_data;
spin_lock_irqsave(&usbhid->inlock, flags);
- if (hid->open > 0 && !test_bit(HID_SUSPENDED, &usbhid->iofl) &&
+ if (hid->open > 0 && !test_bit(HID_REPORTED_IDLE, &usbhid->iofl) &&
!test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
if (rc != 0)
@@ -178,6 +180,44 @@ done:
spin_unlock_irqrestore(&usbhid->inlock, flags);
}
+static int usbhid_restart_out_queue(struct usbhid_device *usbhid)
+{
+ struct hid_device *hid = usb_get_intfdata(usbhid->intf);
+ int kicked;
+
+ WARN_ON(hid == NULL);
+ if (!hid)
+ return 0;
+
+ if ((kicked = (usbhid->outhead != usbhid->outtail))) {
+ dbg("Kicking head %d tail %d", usbhid->outhead,
usbhid->outtail);
+ if (hid_submit_out(hid)) {
+ clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
+ wake_up(&hid->wait);
+ }
+ }
+ return kicked;
+}
+
+static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid)
+{
+ struct hid_device *hid = usb_get_intfdata(usbhid->intf);
+ int kicked;
+
+ WARN_ON(hid == NULL);
+ if (!hid)
+ return 0;
+
+ if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) {
+ dbg("Kicking head %d tail %d", usbhid->ctrlhead,
usbhid->ctrltail);
+ if (hid_submit_ctrl(hid)) {
+ clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
+ wake_up(&hid->wait);
+ }
+ }
+ return kicked;
+}
+
/*
* Input interrupt completion handler.
*/
@@ -234,9 +274,11 @@ static int hid_submit_out(struct hid_dev
struct hid_report *report;
struct usbhid_device *usbhid = hid->driver_data;
+ WARN_ON(usbhid == NULL);
report = usbhid->out[usbhid->outtail];
-
+ WARN_ON(report == NULL);
hid_output_report(report, usbhid->outbuf);
+ BUG_ON(usbhid->urbout == NULL);
usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1
+ (report->id > 0);
usbhid->urbout->dev = hid_to_usb_dev(hid);
@@ -324,24 +366,20 @@ static void hid_irq_out(struct urb *urb)
warn("output irq status %d received", urb->status);
}
- spin_lock_irqsave(&usbhid->outlock, flags);
+ spin_lock_irqsave(&usbhid->outputlock, flags);
if (unplug)
usbhid->outtail = usbhid->outhead;
else
usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE
- 1);
- if (usbhid->outhead != usbhid->outtail) {
- if (hid_submit_out(hid)) {
- clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
- wake_up(&hid->wait);
- }
- spin_unlock_irqrestore(&usbhid->outlock, flags);
+ if (usbhid_restart_out_queue(usbhid)) {
+ spin_unlock_irqrestore(&usbhid->outputlock, flags);
return;
}
clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
- spin_unlock_irqrestore(&usbhid->outlock, flags);
+ spin_unlock_irqrestore(&usbhid->outputlock, flags);
wake_up(&hid->wait);
}
@@ -356,7 +394,7 @@ static void hid_ctrl(struct urb *urb)
unsigned long flags;
int unplug = 0;
- spin_lock_irqsave(&usbhid->ctrllock, flags);
+ spin_lock_irqsave(&usbhid->outputlock, flags);
switch (urb->status) {
case 0: /* success */
@@ -381,24 +419,55 @@ static void hid_ctrl(struct urb *urb)
else
usbhid->ctrltail = (usbhid->ctrltail + 1) &
(HID_CONTROL_FIFO_SIZE - 1);
- if (usbhid->ctrlhead != usbhid->ctrltail) {
- if (hid_submit_ctrl(hid)) {
- clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
- wake_up(&hid->wait);
- }
- spin_unlock_irqrestore(&usbhid->ctrllock, flags);
+ if (usbhid_restart_ctrl_queue(usbhid)) {
+ spin_unlock_irqrestore(&usbhid->outputlock, flags);
return;
}
clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
- spin_unlock_irqrestore(&usbhid->ctrllock, flags);
+ spin_unlock_irqrestore(&usbhid->outputlock, flags);
wake_up(&hid->wait);
}
-void usbhid_submit_report(struct hid_device *hid, struct hid_report *report,
unsigned char dir)
+static int usbhid_queue_report_out(struct hid_device *hid, struct hid_report
*report)
{
+ struct usbhid_device *usbhid = hid->driver_data;
int head;
- unsigned long flags;
+
+ if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) ==
usbhid->outtail) {
+ warn("output queue full");
+ return 0;
+ }
+
+ usbhid->out[usbhid->outhead] = report;
+ usbhid->outhead = head;
+
+ return usbhid->outhead < usbhid->outtail ?
+ usbhid->outtail - usbhid->outhead :
+ HID_OUTPUT_FIFO_SIZE - usbhid->outhead + usbhid->outtail;
+}
+
+static int usbhid_queue_report_ctrl(struct hid_device *hid, struct hid_report
*report, unsigned char dir)
+{
+ struct usbhid_device *usbhid = hid->driver_data;
+ int head;
+
+ if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) ==
usbhid->ctrltail) {
+ warn("control queue full");
+ return 0;
+ }
+
+ usbhid->ctrl[usbhid->ctrlhead].report = report;
+ usbhid->ctrl[usbhid->ctrlhead].dir = dir;
+ usbhid->ctrlhead = head;
+
+ return usbhid->ctrlhead < usbhid->ctrltail ?
+ usbhid->ctrltail - usbhid->ctrlhead :
+ HID_CONTROL_FIFO_SIZE - usbhid->ctrlhead + usbhid->ctrltail;
+}
+
+static void __usbhid_submit_report(struct hid_device *hid, struct hid_report
*report, unsigned char dir)
+{
struct usbhid_device *usbhid = hid->driver_data;
if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
@@ -406,49 +475,53 @@ void usbhid_submit_report(struct hid_dev
if (usbhid->urbout && dir == USB_DIR_OUT && report->type ==
HID_OUTPUT_REPORT) {
- spin_lock_irqsave(&usbhid->outlock, flags);
-
- if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1))
== usbhid->outtail) {
- spin_unlock_irqrestore(&usbhid->outlock, flags);
- warn("output queue full");
- return;
- }
-
- usbhid->out[usbhid->outhead] = report;
- usbhid->outhead = head;
+ usbhid_queue_report_out(hid, report);
if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl))
if (hid_submit_out(hid))
clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
- spin_unlock_irqrestore(&usbhid->outlock, flags);
- return;
- }
+ } else {
- spin_lock_irqsave(&usbhid->ctrllock, flags);
+ usbhid_queue_report_ctrl(hid, report, dir);
+
+ if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl))
+ if (hid_submit_ctrl(hid))
+ clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
- if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) ==
usbhid->ctrltail) {
- spin_unlock_irqrestore(&usbhid->ctrllock, flags);
- warn("control queue full");
- return;
}
+}
- usbhid->ctrl[usbhid->ctrlhead].report = report;
- usbhid->ctrl[usbhid->ctrlhead].dir = dir;
- usbhid->ctrlhead = head;
+void usbhid_submit_report(struct hid_device *hid, struct hid_report *report,
unsigned char dir)
+{
+ struct usbhid_device *usbhid = hid->driver_data;
+ unsigned long flags;
- if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl))
- if (hid_submit_ctrl(hid))
- clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
+ spin_lock_irqsave(&usbhid->outputlock, flags);
+ __usbhid_submit_report(hid, report, dir);
+ spin_unlock_irqrestore(&usbhid->outputlock, flags);
+}
+
+static int usbhid_queue_report(struct hid_device *hid, struct hid_report
*report, unsigned char dir)
+{
+ struct usbhid_device *usbhid = hid->driver_data;
+ int rv;
- spin_unlock_irqrestore(&usbhid->ctrllock, flags);
+ if (usbhid->urbout && dir == USB_DIR_OUT && report->type ==
HID_OUTPUT_REPORT) {
+ rv = usbhid_queue_report_out(hid, report);
+ } else {
+ rv = usbhid_queue_report_ctrl(hid, report, dir);
+ }
+ return rv;
}
static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type,
unsigned int code, int value)
{
struct hid_device *hid = input_get_drvdata(dev);
+ struct usbhid_device *usbhid = hid->driver_data;
struct hid_field *field;
- int offset;
+ unsigned long flags;
+ int offset, used;
if (type == EV_FF)
return input_ff_event(dev, type, code, value);
@@ -461,9 +534,21 @@ static int usb_hidinput_input_event(stru
return -1;
}
+ spin_lock_irqsave(&usbhid->outputlock, flags);
+
hid_set_field(field, offset, value);
- usbhid_submit_report(hid, field->report, USB_DIR_OUT);
+ if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
+ /* the device isn't idle, we do the output now*/
+ __usbhid_submit_report(hid, field->report, USB_DIR_OUT);
+ } else {
+ /* the device is idle, queue the request
+ and wake it up if the queue fills up too much*/
+ used = usbhid_queue_report(hid, field->report, USB_DIR_OUT);
+ if ( 3 < HID_OUTPUT_FIFO_SIZE - used)
+ schedule_work(&usbhid->restart_work);
+ }
+ spin_unlock_irqrestore(&usbhid->outputlock, flags);
return 0;
}
@@ -506,7 +591,9 @@ static int hid_get_class_descriptor(stru
int usbhid_open(struct hid_device *hid)
{
- ++hid->open;
+ struct usbhid_device *usbhid = hid->driver_data;
+
+ hid->open++;
if (hid_start_in(hid))
hid_io_error(hid);
return 0;
@@ -516,8 +603,10 @@ void usbhid_close(struct hid_device *hid
{
struct usbhid_device *usbhid = hid->driver_data;
- if (!--hid->open)
+ if (!--hid->open) {
usb_kill_urb(usbhid->urbin);
+ flush_scheduled_work();
+ }
}
/*
@@ -527,14 +616,21 @@ void usbhid_close(struct hid_device *hid
void usbhid_init_reports(struct hid_device *hid)
{
struct hid_report *report;
- struct usbhid_device *usbhid = hid->driver_data;
+ unsigned long flags;
int err, ret;
+ struct usbhid_device *usbhid = hid->driver_data;
- list_for_each_entry(report,
&hid->report_enum[HID_INPUT_REPORT].report_list, list)
- usbhid_submit_report(hid, report, USB_DIR_IN);
+ list_for_each_entry(report,
&hid->report_enum[HID_INPUT_REPORT].report_list, list) {
+ spin_lock_irqsave(&usbhid->outputlock, flags);
+ __usbhid_submit_report(hid, report, USB_DIR_IN);
+ spin_unlock_irqrestore(&usbhid->outputlock, flags);
+ }
- list_for_each_entry(report,
&hid->report_enum[HID_FEATURE_REPORT].report_list, list)
- usbhid_submit_report(hid, report, USB_DIR_IN);
+ list_for_each_entry(report,
&hid->report_enum[HID_FEATURE_REPORT].report_list, list) {
+ spin_lock_irqsave(&usbhid->outputlock, flags);
+ __usbhid_submit_report(hid, report, USB_DIR_IN);
+ spin_unlock_irqrestore(&usbhid->outputlock, flags);
+ }
err = 0;
ret = usbhid_wait_io(hid);
@@ -622,6 +718,21 @@ static int hid_alloc_buffers(struct usb_
return 0;
}
+static void usbhid_restart_queues(struct usbhid_device *usbhid)
+{
+ if (usbhid->urbout)
+ usbhid_restart_out_queue(usbhid);
+ usbhid_restart_ctrl_queue(usbhid);
+}
+
+static void __usbhid_restart_queues(struct work_struct *work)
+{
+ struct usbhid_device *usbhid =
+ container_of(work, struct usbhid_device, restart_work);
+
+ usbhid_restart_queues(usbhid);
+}
+
static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
{
struct usbhid_device *usbhid = hid->driver_data;
@@ -868,11 +979,11 @@ static struct hid_device *usb_hid_config
init_waitqueue_head(&hid->wait);
INIT_WORK(&usbhid->reset_work, hid_reset);
+ INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues);
setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
spin_lock_init(&usbhid->inlock);
- spin_lock_init(&usbhid->outlock);
- spin_lock_init(&usbhid->ctrllock);
+ spin_lock_init(&usbhid->outputlock);
hid->version = le16_to_cpu(hdesc->bcdHID);
hid->country = hdesc->bCountryCode;
@@ -984,6 +1095,8 @@ static int hid_probe(struct usb_interfac
if (!(hid = usb_hid_configure(intf)))
return -ENODEV;
+ usb_set_intfdata(intf, hid);
+
usbhid_init_reports(hid);
hid_dump_device(hid);
if (hid->quirks & HID_QUIRK_RESET_LEDS)
@@ -994,7 +1107,6 @@ static int hid_probe(struct usb_interfac
if (!hiddev_connect(hid))
hid->claimed |= HID_CLAIMED_HIDDEV;
- usb_set_intfdata(intf, hid);
if (!hid->claimed) {
printk ("HID device not claimed by input or hiddev\n");
@@ -1038,14 +1150,20 @@ static int hid_probe(struct usb_interfac
static int hid_suspend(struct usb_interface *intf, pm_message_t message)
{
- struct hid_device *hid = usb_get_intfdata (intf);
+ struct hid_device *hid = usb_get_intfdata(intf);
struct usbhid_device *usbhid = hid->driver_data;
+ struct usb_device *udev = interface_to_usbdev(intf);
- spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
- set_bit(HID_SUSPENDED, &usbhid->iofl);
+
+ spin_lock_irq(&usbhid->inlock);
+ set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
spin_unlock_irq(&usbhid->inlock);
+ if (usbhid_wait_io(hid) < 0)
+ return -EIO;
+
del_timer(&usbhid->io_retry);
usb_kill_urb(usbhid->urbin);
+ flush_scheduled_work();
dev_dbg(&intf->dev, "suspend\n");
return 0;
}
@@ -1056,9 +1174,10 @@ static int hid_resume(struct usb_interfa
struct usbhid_device *usbhid = hid->driver_data;
int status;
- clear_bit(HID_SUSPENDED, &usbhid->iofl);
+ clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
usbhid->retry_delay = 0;
status = hid_start_in(hid);
+ usbhid_restart_queues(usbhid);
dev_dbg(&intf->dev, "resume status %d\n", status);
return status;
}
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