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kernel-ark/drivers/usb/misc/usbtest.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

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#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/scatterlist.h>
#include <linux/usb.h>
/*-------------------------------------------------------------------------*/
// FIXME make these public somewhere; usbdevfs.h?
//
struct usbtest_param {
// inputs
unsigned test_num; /* 0..(TEST_CASES-1) */
unsigned iterations;
unsigned length;
unsigned vary;
unsigned sglen;
// outputs
struct timeval duration;
};
#define USBTEST_REQUEST _IOWR('U', 100, struct usbtest_param)
/*-------------------------------------------------------------------------*/
#define GENERIC /* let probe() bind using module params */
/* Some devices that can be used for testing will have "real" drivers.
* Entries for those need to be enabled here by hand, after disabling
* that "real" driver.
*/
//#define IBOT2 /* grab iBOT2 webcams */
//#define KEYSPAN_19Qi /* grab un-renumerated serial adapter */
/*-------------------------------------------------------------------------*/
struct usbtest_info {
const char *name;
u8 ep_in; /* bulk/intr source */
u8 ep_out; /* bulk/intr sink */
unsigned autoconf : 1;
unsigned ctrl_out : 1;
unsigned iso : 1; /* try iso in/out */
int alt;
};
/* this is accessed only through usbfs ioctl calls.
* one ioctl to issue a test ... one lock per device.
* tests create other threads if they need them.
* urbs and buffers are allocated dynamically,
* and data generated deterministically.
*/
struct usbtest_dev {
struct usb_interface *intf;
struct usbtest_info *info;
int in_pipe;
int out_pipe;
int in_iso_pipe;
int out_iso_pipe;
struct usb_endpoint_descriptor *iso_in, *iso_out;
struct semaphore sem;
#define TBUF_SIZE 256
u8 *buf;
};
static struct usb_device *testdev_to_usbdev (struct usbtest_dev *test)
{
return interface_to_usbdev (test->intf);
}
/* set up all urbs so they can be used with either bulk or interrupt */
#define INTERRUPT_RATE 1 /* msec/transfer */
#define xprintk(tdev,level,fmt,args...) \
dev_printk(level , &(tdev)->intf->dev , fmt , ## args)
#ifdef DEBUG
#define DBG(dev,fmt,args...) \
xprintk(dev , KERN_DEBUG , fmt , ## args)
#else
#define DBG(dev,fmt,args...) \
do { } while (0)
#endif /* DEBUG */
#ifdef VERBOSE
#define VDBG DBG
#else
#define VDBG(dev,fmt,args...) \
do { } while (0)
#endif /* VERBOSE */
#define ERROR(dev,fmt,args...) \
xprintk(dev , KERN_ERR , fmt , ## args)
#define WARN(dev,fmt,args...) \
xprintk(dev , KERN_WARNING , fmt , ## args)
#define INFO(dev,fmt,args...) \
xprintk(dev , KERN_INFO , fmt , ## args)
/*-------------------------------------------------------------------------*/
static int
get_endpoints (struct usbtest_dev *dev, struct usb_interface *intf)
{
int tmp;
struct usb_host_interface *alt;
struct usb_host_endpoint *in, *out;
struct usb_host_endpoint *iso_in, *iso_out;
struct usb_device *udev;
for (tmp = 0; tmp < intf->num_altsetting; tmp++) {
unsigned ep;
in = out = NULL;
iso_in = iso_out = NULL;
alt = intf->altsetting + tmp;
/* take the first altsetting with in-bulk + out-bulk;
* ignore other endpoints and altsetttings.
*/
for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) {
struct usb_host_endpoint *e;
e = alt->endpoint + ep;
switch (e->desc.bmAttributes) {
case USB_ENDPOINT_XFER_BULK:
break;
case USB_ENDPOINT_XFER_ISOC:
if (dev->info->iso)
goto try_iso;
// FALLTHROUGH
default:
continue;
}
if (e->desc.bEndpointAddress & USB_DIR_IN) {
if (!in)
in = e;
} else {
if (!out)
out = e;
}
continue;
try_iso:
if (e->desc.bEndpointAddress & USB_DIR_IN) {
if (!iso_in)
iso_in = e;
} else {
if (!iso_out)
iso_out = e;
}
}
if ((in && out) || (iso_in && iso_out))
goto found;
}
return -EINVAL;
found:
udev = testdev_to_usbdev (dev);
if (alt->desc.bAlternateSetting != 0) {
tmp = usb_set_interface (udev,
alt->desc.bInterfaceNumber,
alt->desc.bAlternateSetting);
if (tmp < 0)
return tmp;
}
if (in) {
dev->in_pipe = usb_rcvbulkpipe (udev,
in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
dev->out_pipe = usb_sndbulkpipe (udev,
out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
}
if (iso_in) {
dev->iso_in = &iso_in->desc;
dev->in_iso_pipe = usb_rcvisocpipe (udev,
iso_in->desc.bEndpointAddress
& USB_ENDPOINT_NUMBER_MASK);
dev->iso_out = &iso_out->desc;
dev->out_iso_pipe = usb_sndisocpipe (udev,
iso_out->desc.bEndpointAddress
& USB_ENDPOINT_NUMBER_MASK);
}
return 0;
}
/*-------------------------------------------------------------------------*/
/* Support for testing basic non-queued I/O streams.
*
* These just package urbs as requests that can be easily canceled.
* Each urb's data buffer is dynamically allocated; callers can fill
* them with non-zero test data (or test for it) when appropriate.
*/
static void simple_callback (struct urb *urb)
{
complete ((struct completion *) urb->context);
}
static struct urb *simple_alloc_urb (
struct usb_device *udev,
int pipe,
unsigned long bytes
)
{
struct urb *urb;
if (bytes < 0)
return NULL;
urb = usb_alloc_urb (0, SLAB_KERNEL);
if (!urb)
return urb;
usb_fill_bulk_urb (urb, udev, pipe, NULL, bytes, simple_callback, NULL);
urb->interval = (udev->speed == USB_SPEED_HIGH)
? (INTERRUPT_RATE << 3)
: INTERRUPT_RATE;
urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
if (usb_pipein (pipe))
urb->transfer_flags |= URB_SHORT_NOT_OK;
urb->transfer_buffer = usb_buffer_alloc (udev, bytes, SLAB_KERNEL,
&urb->transfer_dma);
if (!urb->transfer_buffer) {
usb_free_urb (urb);
urb = NULL;
} else
memset (urb->transfer_buffer, 0, bytes);
return urb;
}
static unsigned pattern = 0;
module_param (pattern, uint, S_IRUGO);
// MODULE_PARM_DESC (pattern, "i/o pattern (0 == zeroes)");
static inline void simple_fill_buf (struct urb *urb)
{
unsigned i;
u8 *buf = urb->transfer_buffer;
unsigned len = urb->transfer_buffer_length;
switch (pattern) {
default:
// FALLTHROUGH
case 0:
memset (buf, 0, len);
break;
case 1: /* mod63 */
for (i = 0; i < len; i++)
*buf++ = (u8) (i % 63);
break;
}
}
static inline int simple_check_buf (struct urb *urb)
{
unsigned i;
u8 expected;
u8 *buf = urb->transfer_buffer;
unsigned len = urb->actual_length;
for (i = 0; i < len; i++, buf++) {
switch (pattern) {
/* all-zeroes has no synchronization issues */
case 0:
expected = 0;
break;
/* mod63 stays in sync with short-terminated transfers,
* or otherwise when host and gadget agree on how large
* each usb transfer request should be. resync is done
* with set_interface or set_config.
*/
case 1: /* mod63 */
expected = i % 63;
break;
/* always fail unsupported patterns */
default:
expected = !*buf;
break;
}
if (*buf == expected)
continue;
dbg ("buf[%d] = %d (not %d)", i, *buf, expected);
return -EINVAL;
}
return 0;
}
static void simple_free_urb (struct urb *urb)
{
usb_buffer_free (urb->dev, urb->transfer_buffer_length,
urb->transfer_buffer, urb->transfer_dma);
usb_free_urb (urb);
}
static int simple_io (
struct urb *urb,
int iterations,
int vary,
int expected,
const char *label
)
{
struct usb_device *udev = urb->dev;
int max = urb->transfer_buffer_length;
struct completion completion;
int retval = 0;
urb->context = &completion;
while (retval == 0 && iterations-- > 0) {
init_completion (&completion);
if (usb_pipeout (urb->pipe))
simple_fill_buf (urb);
if ((retval = usb_submit_urb (urb, SLAB_KERNEL)) != 0)
break;
/* NOTE: no timeouts; can't be broken out of by interrupt */
wait_for_completion (&completion);
retval = urb->status;
urb->dev = udev;
if (retval == 0 && usb_pipein (urb->pipe))
retval = simple_check_buf (urb);
if (vary) {
int len = urb->transfer_buffer_length;
len += vary;
len %= max;
if (len == 0)
len = (vary < max) ? vary : max;
urb->transfer_buffer_length = len;
}
/* FIXME if endpoint halted, clear halt (and log) */
}
urb->transfer_buffer_length = max;
if (expected != retval)
dev_dbg (&udev->dev,
"%s failed, iterations left %d, status %d (not %d)\n",
label, iterations, retval, expected);
return retval;
}
/*-------------------------------------------------------------------------*/
/* We use scatterlist primitives to test queued I/O.
* Yes, this also tests the scatterlist primitives.
*/
static void free_sglist (struct scatterlist *sg, int nents)
{
unsigned i;
if (!sg)
return;
for (i = 0; i < nents; i++) {
if (!sg [i].page)
continue;
kfree (page_address (sg [i].page) + sg [i].offset);
}
kfree (sg);
}
static struct scatterlist *
alloc_sglist (int nents, int max, int vary)
{
struct scatterlist *sg;
unsigned i;
unsigned size = max;
sg = kmalloc (nents * sizeof *sg, SLAB_KERNEL);
if (!sg)
return NULL;
for (i = 0; i < nents; i++) {
char *buf;
unsigned j;
buf = kzalloc (size, SLAB_KERNEL);
if (!buf) {
free_sglist (sg, i);
return NULL;
}
/* kmalloc pages are always physically contiguous! */
sg_init_one(&sg[i], buf, size);
switch (pattern) {
case 0:
/* already zeroed */
break;
case 1:
for (j = 0; j < size; j++)
*buf++ = (u8) (j % 63);
break;
}
if (vary) {
size += vary;
size %= max;
if (size == 0)
size = (vary < max) ? vary : max;
}
}
return sg;
}
static int perform_sglist (
struct usb_device *udev,
unsigned iterations,
int pipe,
struct usb_sg_request *req,
struct scatterlist *sg,
int nents
)
{
int retval = 0;
while (retval == 0 && iterations-- > 0) {
retval = usb_sg_init (req, udev, pipe,
(udev->speed == USB_SPEED_HIGH)
? (INTERRUPT_RATE << 3)
: INTERRUPT_RATE,
sg, nents, 0, SLAB_KERNEL);
if (retval)
break;
usb_sg_wait (req);
retval = req->status;
/* FIXME check resulting data pattern */
/* FIXME if endpoint halted, clear halt (and log) */
}
// FIXME for unlink or fault handling tests, don't report
// failure if retval is as we expected ...
if (retval)
dbg ("perform_sglist failed, iterations left %d, status %d",
iterations, retval);
return retval;
}
/*-------------------------------------------------------------------------*/
/* unqueued control message testing
*
* there's a nice set of device functional requirements in chapter 9 of the
* usb 2.0 spec, which we can apply to ANY device, even ones that don't use
* special test firmware.
*
* we know the device is configured (or suspended) by the time it's visible
* through usbfs. we can't change that, so we won't test enumeration (which
* worked 'well enough' to get here, this time), power management (ditto),
* or remote wakeup (which needs human interaction).
*/
static unsigned realworld = 1;
module_param (realworld, uint, 0);
MODULE_PARM_DESC (realworld, "clear to demand stricter spec compliance");
static int get_altsetting (struct usbtest_dev *dev)
{
struct usb_interface *iface = dev->intf;
struct usb_device *udev = interface_to_usbdev (iface);
int retval;
retval = usb_control_msg (udev, usb_rcvctrlpipe (udev, 0),
USB_REQ_GET_INTERFACE, USB_DIR_IN|USB_RECIP_INTERFACE,
0, iface->altsetting [0].desc.bInterfaceNumber,
dev->buf, 1, USB_CTRL_GET_TIMEOUT);
switch (retval) {
case 1:
return dev->buf [0];
case 0:
retval = -ERANGE;
// FALLTHROUGH
default:
return retval;
}
}
static int set_altsetting (struct usbtest_dev *dev, int alternate)
{
struct usb_interface *iface = dev->intf;
struct usb_device *udev;
if (alternate < 0 || alternate >= 256)
return -EINVAL;
udev = interface_to_usbdev (iface);
return usb_set_interface (udev,
iface->altsetting [0].desc.bInterfaceNumber,
alternate);
}
static int is_good_config (char *buf, int len)
{
struct usb_config_descriptor *config;
if (len < sizeof *config)
return 0;
config = (struct usb_config_descriptor *) buf;
switch (config->bDescriptorType) {
case USB_DT_CONFIG:
case USB_DT_OTHER_SPEED_CONFIG:
if (config->bLength != 9) {
dbg ("bogus config descriptor length");
return 0;
}
/* this bit 'must be 1' but often isn't */
if (!realworld && !(config->bmAttributes & 0x80)) {
dbg ("high bit of config attributes not set");
return 0;
}
if (config->bmAttributes & 0x1f) { /* reserved == 0 */
dbg ("reserved config bits set");
return 0;
}
break;
default:
return 0;
}
if (le16_to_cpu(config->wTotalLength) == len) /* read it all */
return 1;
if (le16_to_cpu(config->wTotalLength) >= TBUF_SIZE) /* max partial read */
return 1;
dbg ("bogus config descriptor read size");
return 0;
}
/* sanity test for standard requests working with usb_control_mesg() and some
* of the utility functions which use it.
*
* this doesn't test how endpoint halts behave or data toggles get set, since
* we won't do I/O to bulk/interrupt endpoints here (which is how to change
* halt or toggle). toggle testing is impractical without support from hcds.
*
* this avoids failing devices linux would normally work with, by not testing
* config/altsetting operations for devices that only support their defaults.
* such devices rarely support those needless operations.
*
* NOTE that since this is a sanity test, it's not examining boundary cases
* to see if usbcore, hcd, and device all behave right. such testing would
* involve varied read sizes and other operation sequences.
*/
static int ch9_postconfig (struct usbtest_dev *dev)
{
struct usb_interface *iface = dev->intf;
struct usb_device *udev = interface_to_usbdev (iface);
int i, alt, retval;
/* [9.2.3] if there's more than one altsetting, we need to be able to
* set and get each one. mostly trusts the descriptors from usbcore.
*/
for (i = 0; i < iface->num_altsetting; i++) {
/* 9.2.3 constrains the range here */
alt = iface->altsetting [i].desc.bAlternateSetting;
if (alt < 0 || alt >= iface->num_altsetting) {
dev_dbg (&iface->dev,
"invalid alt [%d].bAltSetting = %d\n",
i, alt);
}
/* [real world] get/set unimplemented if there's only one */
if (realworld && iface->num_altsetting == 1)
continue;
/* [9.4.10] set_interface */
retval = set_altsetting (dev, alt);
if (retval) {
dev_dbg (&iface->dev, "can't set_interface = %d, %d\n",
alt, retval);
return retval;
}
/* [9.4.4] get_interface always works */
retval = get_altsetting (dev);
if (retval != alt) {
dev_dbg (&iface->dev, "get alt should be %d, was %d\n",
alt, retval);
return (retval < 0) ? retval : -EDOM;
}
}
/* [real world] get_config unimplemented if there's only one */
if (!realworld || udev->descriptor.bNumConfigurations != 1) {
int expected = udev->actconfig->desc.bConfigurationValue;
/* [9.4.2] get_configuration always works
* ... although some cheap devices (like one TI Hub I've got)
* won't return config descriptors except before set_config.
*/
retval = usb_control_msg (udev, usb_rcvctrlpipe (udev, 0),
USB_REQ_GET_CONFIGURATION,
USB_DIR_IN | USB_RECIP_DEVICE,
0, 0, dev->buf, 1, USB_CTRL_GET_TIMEOUT);
if (retval != 1 || dev->buf [0] != expected) {
dev_dbg (&iface->dev, "get config --> %d %d (1 %d)\n",
retval, dev->buf[0], expected);
return (retval < 0) ? retval : -EDOM;
}
}
/* there's always [9.4.3] a device descriptor [9.6.1] */
retval = usb_get_descriptor (udev, USB_DT_DEVICE, 0,
dev->buf, sizeof udev->descriptor);
if (retval != sizeof udev->descriptor) {
dev_dbg (&iface->dev, "dev descriptor --> %d\n", retval);
return (retval < 0) ? retval : -EDOM;
}
/* there's always [9.4.3] at least one config descriptor [9.6.3] */
for (i = 0; i < udev->descriptor.bNumConfigurations; i++) {
retval = usb_get_descriptor (udev, USB_DT_CONFIG, i,
dev->buf, TBUF_SIZE);
if (!is_good_config (dev->buf, retval)) {
dev_dbg (&iface->dev,
"config [%d] descriptor --> %d\n",
i, retval);
return (retval < 0) ? retval : -EDOM;
}
// FIXME cross-checking udev->config[i] to make sure usbcore
// parsed it right (etc) would be good testing paranoia
}
/* and sometimes [9.2.6.6] speed dependent descriptors */
if (le16_to_cpu(udev->descriptor.bcdUSB) == 0x0200) {
struct usb_qualifier_descriptor *d = NULL;
/* device qualifier [9.6.2] */
retval = usb_get_descriptor (udev,
USB_DT_DEVICE_QUALIFIER, 0, dev->buf,
sizeof (struct usb_qualifier_descriptor));
if (retval == -EPIPE) {
if (udev->speed == USB_SPEED_HIGH) {
dev_dbg (&iface->dev,
"hs dev qualifier --> %d\n",
retval);
return (retval < 0) ? retval : -EDOM;
}
/* usb2.0 but not high-speed capable; fine */
} else if (retval != sizeof (struct usb_qualifier_descriptor)) {
dev_dbg (&iface->dev, "dev qualifier --> %d\n", retval);
return (retval < 0) ? retval : -EDOM;
} else
d = (struct usb_qualifier_descriptor *) dev->buf;
/* might not have [9.6.2] any other-speed configs [9.6.4] */
if (d) {
unsigned max = d->bNumConfigurations;
for (i = 0; i < max; i++) {
retval = usb_get_descriptor (udev,
USB_DT_OTHER_SPEED_CONFIG, i,
dev->buf, TBUF_SIZE);
if (!is_good_config (dev->buf, retval)) {
dev_dbg (&iface->dev,
"other speed config --> %d\n",
retval);
return (retval < 0) ? retval : -EDOM;
}
}
}
}
// FIXME fetch strings from at least the device descriptor
/* [9.4.5] get_status always works */
retval = usb_get_status (udev, USB_RECIP_DEVICE, 0, dev->buf);
if (retval != 2) {
dev_dbg (&iface->dev, "get dev status --> %d\n", retval);
return (retval < 0) ? retval : -EDOM;
}
// FIXME configuration.bmAttributes says if we could try to set/clear
// the device's remote wakeup feature ... if we can, test that here
retval = usb_get_status (udev, USB_RECIP_INTERFACE,
iface->altsetting [0].desc.bInterfaceNumber, dev->buf);
if (retval != 2) {
dev_dbg (&iface->dev, "get interface status --> %d\n", retval);
return (retval < 0) ? retval : -EDOM;
}
// FIXME get status for each endpoint in the interface
return 0;
}
/*-------------------------------------------------------------------------*/
/* use ch9 requests to test whether:
* (a) queues work for control, keeping N subtests queued and
* active (auto-resubmit) for M loops through the queue.
* (b) protocol stalls (control-only) will autorecover.
* it's not like bulk/intr; no halt clearing.
* (c) short control reads are reported and handled.
* (d) queues are always processed in-order
*/
struct ctrl_ctx {
spinlock_t lock;
struct usbtest_dev *dev;
struct completion complete;
unsigned count;
unsigned pending;
int status;
struct urb **urb;
struct usbtest_param *param;
int last;
};
#define NUM_SUBCASES 15 /* how many test subcases here? */
struct subcase {
struct usb_ctrlrequest setup;
int number;
int expected;
};
static void ctrl_complete (struct urb *urb)
{
struct ctrl_ctx *ctx = urb->context;
struct usb_ctrlrequest *reqp;
struct subcase *subcase;
int status = urb->status;
reqp = (struct usb_ctrlrequest *)urb->setup_packet;
subcase = container_of (reqp, struct subcase, setup);
spin_lock (&ctx->lock);
ctx->count--;
ctx->pending--;
/* queue must transfer and complete in fifo order, unless
* usb_unlink_urb() is used to unlink something not at the
* physical queue head (not tested).
*/
if (subcase->number > 0) {
if ((subcase->number - ctx->last) != 1) {
dbg ("subcase %d completed out of order, last %d",
subcase->number, ctx->last);
status = -EDOM;
ctx->last = subcase->number;
goto error;
}
}
ctx->last = subcase->number;
/* succeed or fault in only one way? */
if (status == subcase->expected)
status = 0;
/* async unlink for cleanup? */
else if (status != -ECONNRESET) {
/* some faults are allowed, not required */
if (subcase->expected > 0 && (
((urb->status == -subcase->expected /* happened */
|| urb->status == 0)))) /* didn't */
status = 0;
/* sometimes more than one fault is allowed */
else if (subcase->number == 12 && status == -EPIPE)
status = 0;
else
dbg ("subtest %d error, status %d",
subcase->number, status);
}
/* unexpected status codes mean errors; ideally, in hardware */
if (status) {
error:
if (ctx->status == 0) {
int i;
ctx->status = status;
info ("control queue %02x.%02x, err %d, %d left",
reqp->bRequestType, reqp->bRequest,
status, ctx->count);
/* FIXME this "unlink everything" exit route should
* be a separate test case.
*/
/* unlink whatever's still pending */
for (i = 1; i < ctx->param->sglen; i++) {
struct urb *u = ctx->urb [
(i + subcase->number) % ctx->param->sglen];
if (u == urb || !u->dev)
continue;
spin_unlock(&ctx->lock);
status = usb_unlink_urb (u);
spin_lock(&ctx->lock);
switch (status) {
case -EINPROGRESS:
case -EBUSY:
case -EIDRM:
continue;
default:
dbg ("urb unlink --> %d", status);
}
}
status = ctx->status;
}
}
/* resubmit if we need to, else mark this as done */
if ((status == 0) && (ctx->pending < ctx->count)) {
if ((status = usb_submit_urb (urb, SLAB_ATOMIC)) != 0) {
dbg ("can't resubmit ctrl %02x.%02x, err %d",
reqp->bRequestType, reqp->bRequest, status);
urb->dev = NULL;
} else
ctx->pending++;
} else
urb->dev = NULL;
/* signal completion when nothing's queued */
if (ctx->pending == 0)
complete (&ctx->complete);
spin_unlock (&ctx->lock);
}
static int
test_ctrl_queue (struct usbtest_dev *dev, struct usbtest_param *param)
{
struct usb_device *udev = testdev_to_usbdev (dev);
struct urb **urb;
struct ctrl_ctx context;
int i;
spin_lock_init (&context.lock);
context.dev = dev;
init_completion (&context.complete);
context.count = param->sglen * param->iterations;
context.pending = 0;
context.status = -ENOMEM;
context.param = param;
context.last = -1;
/* allocate and init the urbs we'll queue.
* as with bulk/intr sglists, sglen is the queue depth; it also
* controls which subtests run (more tests than sglen) or rerun.
*/
urb = kcalloc(param->sglen, sizeof(struct urb *), SLAB_KERNEL);
if (!urb)
return -ENOMEM;
for (i = 0; i < param->sglen; i++) {
int pipe = usb_rcvctrlpipe (udev, 0);
unsigned len;
struct urb *u;
struct usb_ctrlrequest req;
struct subcase *reqp;
int expected = 0;
/* requests here are mostly expected to succeed on any
* device, but some are chosen to trigger protocol stalls
* or short reads.
*/
memset (&req, 0, sizeof req);
req.bRequest = USB_REQ_GET_DESCRIPTOR;
req.bRequestType = USB_DIR_IN|USB_RECIP_DEVICE;
switch (i % NUM_SUBCASES) {
case 0: // get device descriptor
req.wValue = cpu_to_le16 (USB_DT_DEVICE << 8);
len = sizeof (struct usb_device_descriptor);
break;
case 1: // get first config descriptor (only)
req.wValue = cpu_to_le16 ((USB_DT_CONFIG << 8) | 0);
len = sizeof (struct usb_config_descriptor);
break;
case 2: // get altsetting (OFTEN STALLS)
req.bRequest = USB_REQ_GET_INTERFACE;
req.bRequestType = USB_DIR_IN|USB_RECIP_INTERFACE;
// index = 0 means first interface
len = 1;
expected = EPIPE;
break;
case 3: // get interface status
req.bRequest = USB_REQ_GET_STATUS;
req.bRequestType = USB_DIR_IN|USB_RECIP_INTERFACE;
// interface 0
len = 2;
break;
case 4: // get device status
req.bRequest = USB_REQ_GET_STATUS;
req.bRequestType = USB_DIR_IN|USB_RECIP_DEVICE;
len = 2;
break;
case 5: // get device qualifier (MAY STALL)
req.wValue = cpu_to_le16 (USB_DT_DEVICE_QUALIFIER << 8);
len = sizeof (struct usb_qualifier_descriptor);
if (udev->speed != USB_SPEED_HIGH)
expected = EPIPE;
break;
case 6: // get first config descriptor, plus interface
req.wValue = cpu_to_le16 ((USB_DT_CONFIG << 8) | 0);
len = sizeof (struct usb_config_descriptor);
len += sizeof (struct usb_interface_descriptor);
break;
case 7: // get interface descriptor (ALWAYS STALLS)
req.wValue = cpu_to_le16 (USB_DT_INTERFACE << 8);
// interface == 0
len = sizeof (struct usb_interface_descriptor);
expected = EPIPE;
break;
// NOTE: two consecutive stalls in the queue here.
// that tests fault recovery a bit more aggressively.
case 8: // clear endpoint halt (USUALLY STALLS)
req.bRequest = USB_REQ_CLEAR_FEATURE;
req.bRequestType = USB_RECIP_ENDPOINT;
// wValue 0 == ep halt
// wIndex 0 == ep0 (shouldn't halt!)
len = 0;
pipe = usb_sndctrlpipe (udev, 0);
expected = EPIPE;
break;
case 9: // get endpoint status
req.bRequest = USB_REQ_GET_STATUS;
req.bRequestType = USB_DIR_IN|USB_RECIP_ENDPOINT;
// endpoint 0
len = 2;
break;
case 10: // trigger short read (EREMOTEIO)
req.wValue = cpu_to_le16 ((USB_DT_CONFIG << 8) | 0);
len = 1024;
expected = -EREMOTEIO;
break;
// NOTE: two consecutive _different_ faults in the queue.
case 11: // get endpoint descriptor (ALWAYS STALLS)
req.wValue = cpu_to_le16 (USB_DT_ENDPOINT << 8);
// endpoint == 0
len = sizeof (struct usb_interface_descriptor);
expected = EPIPE;
break;
// NOTE: sometimes even a third fault in the queue!
case 12: // get string 0 descriptor (MAY STALL)
req.wValue = cpu_to_le16 (USB_DT_STRING << 8);
// string == 0, for language IDs
len = sizeof (struct usb_interface_descriptor);
// may succeed when > 4 languages
expected = EREMOTEIO; // or EPIPE, if no strings
break;
case 13: // short read, resembling case 10
req.wValue = cpu_to_le16 ((USB_DT_CONFIG << 8) | 0);
// last data packet "should" be DATA1, not DATA0
len = 1024 - udev->descriptor.bMaxPacketSize0;
expected = -EREMOTEIO;
break;
case 14: // short read; try to fill the last packet
req.wValue = cpu_to_le16 ((USB_DT_DEVICE << 8) | 0);
// device descriptor size == 18 bytes
len = udev->descriptor.bMaxPacketSize0;
switch (len) {
case 8: len = 24; break;
case 16: len = 32; break;
}
expected = -EREMOTEIO;
break;
default:
err ("bogus number of ctrl queue testcases!");
context.status = -EINVAL;
goto cleanup;
}
req.wLength = cpu_to_le16 (len);
urb [i] = u = simple_alloc_urb (udev, pipe, len);
if (!u)
goto cleanup;
reqp = usb_buffer_alloc (udev, sizeof *reqp, SLAB_KERNEL,
&u->setup_dma);
if (!reqp)
goto cleanup;
reqp->setup = req;
reqp->number = i % NUM_SUBCASES;
reqp->expected = expected;
u->setup_packet = (char *) &reqp->setup;
u->transfer_flags |= URB_NO_SETUP_DMA_MAP;
u->context = &context;
u->complete = ctrl_complete;
}
/* queue the urbs */
context.urb = urb;
spin_lock_irq (&context.lock);
for (i = 0; i < param->sglen; i++) {
context.status = usb_submit_urb (urb [i], SLAB_ATOMIC);
if (context.status != 0) {
dbg ("can't submit urb[%d], status %d",
i, context.status);
context.count = context.pending;
break;
}
context.pending++;
}
spin_unlock_irq (&context.lock);
/* FIXME set timer and time out; provide a disconnect hook */
/* wait for the last one to complete */
if (context.pending > 0)
wait_for_completion (&context.complete);
cleanup:
for (i = 0; i < param->sglen; i++) {
if (!urb [i])
continue;
urb [i]->dev = udev;
if (urb [i]->setup_packet)
usb_buffer_free (udev, sizeof (struct usb_ctrlrequest),
urb [i]->setup_packet,
urb [i]->setup_dma);
simple_free_urb (urb [i]);
}
kfree (urb);
return context.status;
}
#undef NUM_SUBCASES
/*-------------------------------------------------------------------------*/
static void unlink1_callback (struct urb *urb)
{
int status = urb->status;
// we "know" -EPIPE (stall) never happens
if (!status)
status = usb_submit_urb (urb, SLAB_ATOMIC);
if (status) {
urb->status = status;
complete ((struct completion *) urb->context);
}
}
static int unlink1 (struct usbtest_dev *dev, int pipe, int size, int async)
{
struct urb *urb;
struct completion completion;
int retval = 0;
init_completion (&completion);
urb = simple_alloc_urb (testdev_to_usbdev (dev), pipe, size);
if (!urb)
return -ENOMEM;
urb->context = &completion;
urb->complete = unlink1_callback;
/* keep the endpoint busy. there are lots of hc/hcd-internal
* states, and testing should get to all of them over time.
*
* FIXME want additional tests for when endpoint is STALLing
* due to errors, or is just NAKing requests.
*/
if ((retval = usb_submit_urb (urb, SLAB_KERNEL)) != 0) {
dev_dbg (&dev->intf->dev, "submit fail %d\n", retval);
return retval;
}
/* unlinking that should always work. variable delay tests more
* hcd states and code paths, even with little other system load.
*/
msleep (jiffies % (2 * INTERRUPT_RATE));
if (async) {
retry:
retval = usb_unlink_urb (urb);
if (retval == -EBUSY || retval == -EIDRM) {
/* we can't unlink urbs while they're completing.
* or if they've completed, and we haven't resubmitted.
* "normal" drivers would prevent resubmission, but
* since we're testing unlink paths, we can't.
*/
dev_dbg (&dev->intf->dev, "unlink retry\n");
goto retry;
}
} else
usb_kill_urb (urb);
if (!(retval == 0 || retval == -EINPROGRESS)) {
dev_dbg (&dev->intf->dev, "unlink fail %d\n", retval);
return retval;
}
wait_for_completion (&completion);
retval = urb->status;
simple_free_urb (urb);
if (async)
return (retval == -ECONNRESET) ? 0 : retval - 1000;
else
return (retval == -ENOENT || retval == -EPERM) ?
0 : retval - 2000;
}
static int unlink_simple (struct usbtest_dev *dev, int pipe, int len)
{
int retval = 0;
/* test sync and async paths */
retval = unlink1 (dev, pipe, len, 1);
if (!retval)
retval = unlink1 (dev, pipe, len, 0);
return retval;
}
/*-------------------------------------------------------------------------*/
static int verify_not_halted (int ep, struct urb *urb)
{
int retval;
u16 status;
/* shouldn't look or act halted */
retval = usb_get_status (urb->dev, USB_RECIP_ENDPOINT, ep, &status);
if (retval < 0) {
dbg ("ep %02x couldn't get no-halt status, %d", ep, retval);
return retval;
}
if (status != 0) {
dbg ("ep %02x bogus status: %04x != 0", ep, status);
return -EINVAL;
}
retval = simple_io (urb, 1, 0, 0, __FUNCTION__);
if (retval != 0)
return -EINVAL;
return 0;
}
static int verify_halted (int ep, struct urb *urb)
{
int retval;
u16 status;
/* should look and act halted */
retval = usb_get_status (urb->dev, USB_RECIP_ENDPOINT, ep, &status);
if (retval < 0) {
dbg ("ep %02x couldn't get halt status, %d", ep, retval);
return retval;
}
if (status != 1) {
dbg ("ep %02x bogus status: %04x != 1", ep, status);
return -EINVAL;
}
retval = simple_io (urb, 1, 0, -EPIPE, __FUNCTION__);
if (retval != -EPIPE)
return -EINVAL;
retval = simple_io (urb, 1, 0, -EPIPE, "verify_still_halted");
if (retval != -EPIPE)
return -EINVAL;
return 0;
}
static int test_halt (int ep, struct urb *urb)
{
int retval;
/* shouldn't look or act halted now */
retval = verify_not_halted (ep, urb);
if (retval < 0)
return retval;
/* set halt (protocol test only), verify it worked */
retval = usb_control_msg (urb->dev, usb_sndctrlpipe (urb->dev, 0),
USB_REQ_SET_FEATURE, USB_RECIP_ENDPOINT,
USB_ENDPOINT_HALT, ep,
NULL, 0, USB_CTRL_SET_TIMEOUT);
if (retval < 0) {
dbg ("ep %02x couldn't set halt, %d", ep, retval);
return retval;
}
retval = verify_halted (ep, urb);
if (retval < 0)
return retval;
/* clear halt (tests API + protocol), verify it worked */
retval = usb_clear_halt (urb->dev, urb->pipe);
if (retval < 0) {
dbg ("ep %02x couldn't clear halt, %d", ep, retval);
return retval;
}
retval = verify_not_halted (ep, urb);
if (retval < 0)
return retval;
/* NOTE: could also verify SET_INTERFACE clear halts ... */
return 0;
}
static int halt_simple (struct usbtest_dev *dev)
{
int ep;
int retval = 0;
struct urb *urb;
urb = simple_alloc_urb (testdev_to_usbdev (dev), 0, 512);
if (urb == NULL)
return -ENOMEM;
if (dev->in_pipe) {
ep = usb_pipeendpoint (dev->in_pipe) | USB_DIR_IN;
urb->pipe = dev->in_pipe;
retval = test_halt (ep, urb);
if (retval < 0)
goto done;
}
if (dev->out_pipe) {
ep = usb_pipeendpoint (dev->out_pipe);
urb->pipe = dev->out_pipe;
retval = test_halt (ep, urb);
}
done:
simple_free_urb (urb);
return retval;
}
/*-------------------------------------------------------------------------*/
/* Control OUT tests use the vendor control requests from Intel's
* USB 2.0 compliance test device: write a buffer, read it back.
*
* Intel's spec only _requires_ that it work for one packet, which
* is pretty weak. Some HCDs place limits here; most devices will
* need to be able to handle more than one OUT data packet. We'll
* try whatever we're told to try.
*/
static int ctrl_out (struct usbtest_dev *dev,
unsigned count, unsigned length, unsigned vary)
{
unsigned i, j, len;
int retval;
u8 *buf;
char *what = "?";
struct usb_device *udev;
if (length < 1 || length > 0xffff || vary >= length)
return -EINVAL;
buf = kmalloc(length, SLAB_KERNEL);
if (!buf)
return -ENOMEM;
udev = testdev_to_usbdev (dev);
len = length;
retval = 0;
/* NOTE: hardware might well act differently if we pushed it
* with lots back-to-back queued requests.
*/
for (i = 0; i < count; i++) {
/* write patterned data */
for (j = 0; j < len; j++)
buf [j] = i + j;
retval = usb_control_msg (udev, usb_sndctrlpipe (udev,0),
0x5b, USB_DIR_OUT|USB_TYPE_VENDOR,
0, 0, buf, len, USB_CTRL_SET_TIMEOUT);
if (retval != len) {
what = "write";
if (retval >= 0) {
INFO(dev, "ctrl_out, wlen %d (expected %d)\n",
retval, len);
retval = -EBADMSG;
}
break;
}
/* read it back -- assuming nothing intervened!! */
retval = usb_control_msg (udev, usb_rcvctrlpipe (udev,0),
0x5c, USB_DIR_IN|USB_TYPE_VENDOR,
0, 0, buf, len, USB_CTRL_GET_TIMEOUT);
if (retval != len) {
what = "read";
if (retval >= 0) {
INFO(dev, "ctrl_out, rlen %d (expected %d)\n",
retval, len);
retval = -EBADMSG;
}
break;
}
/* fail if we can't verify */
for (j = 0; j < len; j++) {
if (buf [j] != (u8) (i + j)) {
INFO (dev, "ctrl_out, byte %d is %d not %d\n",
j, buf [j], (u8) i + j);
retval = -EBADMSG;
break;
}
}
if (retval < 0) {
what = "verify";
break;
}
len += vary;
/* [real world] the "zero bytes IN" case isn't really used.
* hardware can easily trip up in this wierd case, since its
* status stage is IN, not OUT like other ep0in transfers.
*/
if (len > length)
len = realworld ? 1 : 0;
}
if (retval < 0)
INFO (dev, "ctrl_out %s failed, code %d, count %d\n",
what, retval, i);
kfree (buf);
return retval;
}
/*-------------------------------------------------------------------------*/
/* ISO tests ... mimics common usage
* - buffer length is split into N packets (mostly maxpacket sized)
* - multi-buffers according to sglen
*/
struct iso_context {
unsigned count;
unsigned pending;
spinlock_t lock;
struct completion done;
int submit_error;
unsigned long errors;
unsigned long packet_count;
struct usbtest_dev *dev;
};
static void iso_callback (struct urb *urb)
{
struct iso_context *ctx = urb->context;
spin_lock(&ctx->lock);
ctx->count--;
ctx->packet_count += urb->number_of_packets;
if (urb->error_count > 0)
ctx->errors += urb->error_count;
else if (urb->status != 0)
ctx->errors += urb->number_of_packets;
if (urb->status == 0 && ctx->count > (ctx->pending - 1)
&& !ctx->submit_error) {
int status = usb_submit_urb (urb, GFP_ATOMIC);
switch (status) {
case 0:
goto done;
default:
dev_dbg (&ctx->dev->intf->dev,
"iso resubmit err %d\n",
status);
/* FALLTHROUGH */
case -ENODEV: /* disconnected */
case -ESHUTDOWN: /* endpoint disabled */
ctx->submit_error = 1;
break;
}
}
simple_free_urb (urb);
ctx->pending--;
if (ctx->pending == 0) {
if (ctx->errors)
dev_dbg (&ctx->dev->intf->dev,
"iso test, %lu errors out of %lu\n",
ctx->errors, ctx->packet_count);
complete (&ctx->done);
}
done:
spin_unlock(&ctx->lock);
}
static struct urb *iso_alloc_urb (
struct usb_device *udev,
int pipe,
struct usb_endpoint_descriptor *desc,
long bytes
)
{
struct urb *urb;
unsigned i, maxp, packets;
if (bytes < 0 || !desc)
return NULL;
maxp = 0x7ff & le16_to_cpu(desc->wMaxPacketSize);
maxp *= 1 + (0x3 & (le16_to_cpu(desc->wMaxPacketSize) >> 11));
packets = (bytes + maxp - 1) / maxp;
urb = usb_alloc_urb (packets, SLAB_KERNEL);
if (!urb)
return urb;
urb->dev = udev;
urb->pipe = pipe;
urb->number_of_packets = packets;
urb->transfer_buffer_length = bytes;
urb->transfer_buffer = usb_buffer_alloc (udev, bytes, SLAB_KERNEL,
&urb->transfer_dma);
if (!urb->transfer_buffer) {
usb_free_urb (urb);
return NULL;
}
memset (urb->transfer_buffer, 0, bytes);
for (i = 0; i < packets; i++) {
/* here, only the last packet will be short */
urb->iso_frame_desc[i].length = min ((unsigned) bytes, maxp);
bytes -= urb->iso_frame_desc[i].length;
urb->iso_frame_desc[i].offset = maxp * i;
}
urb->complete = iso_callback;
// urb->context = SET BY CALLER
urb->interval = 1 << (desc->bInterval - 1);
urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
return urb;
}
static int
test_iso_queue (struct usbtest_dev *dev, struct usbtest_param *param,
int pipe, struct usb_endpoint_descriptor *desc)
{
struct iso_context context;
struct usb_device *udev;
unsigned i;
unsigned long packets = 0;
int status = 0;
struct urb *urbs[10]; /* FIXME no limit */
if (param->sglen > 10)
return -EDOM;
memset(&context, 0, sizeof context);
context.count = param->iterations * param->sglen;
context.dev = dev;
init_completion (&context.done);
spin_lock_init (&context.lock);
memset (urbs, 0, sizeof urbs);
udev = testdev_to_usbdev (dev);
dev_dbg (&dev->intf->dev,
"... iso period %d %sframes, wMaxPacket %04x\n",
1 << (desc->bInterval - 1),
(udev->speed == USB_SPEED_HIGH) ? "micro" : "",
le16_to_cpu(desc->wMaxPacketSize));
for (i = 0; i < param->sglen; i++) {
urbs [i] = iso_alloc_urb (udev, pipe, desc,
param->length);
if (!urbs [i]) {
status = -ENOMEM;
goto fail;
}
packets += urbs[i]->number_of_packets;
urbs [i]->context = &context;
}
packets *= param->iterations;
dev_dbg (&dev->intf->dev,
"... total %lu msec (%lu packets)\n",
(packets * (1 << (desc->bInterval - 1)))
/ ((udev->speed == USB_SPEED_HIGH) ? 8 : 1),
packets);
spin_lock_irq (&context.lock);
for (i = 0; i < param->sglen; i++) {
++context.pending;
status = usb_submit_urb (urbs [i], SLAB_ATOMIC);
if (status < 0) {
ERROR (dev, "submit iso[%d], error %d\n", i, status);
if (i == 0) {
spin_unlock_irq (&context.lock);
goto fail;
}
simple_free_urb (urbs [i]);
context.pending--;
context.submit_error = 1;
break;
}
}
spin_unlock_irq (&context.lock);
wait_for_completion (&context.done);
/*
* Isochronous transfers are expected to fail sometimes. As an
* arbitrary limit, we will report an error if any submissions
* fail or if the transfer failure rate is > 10%.
*/
if (status != 0)
;
else if (context.submit_error)
status = -EACCES;
else if (context.errors > context.packet_count / 10)
status = -EIO;
return status;
fail:
for (i = 0; i < param->sglen; i++) {
if (urbs [i])
simple_free_urb (urbs [i]);
}
return status;
}
/*-------------------------------------------------------------------------*/
/* We only have this one interface to user space, through usbfs.
* User mode code can scan usbfs to find N different devices (maybe on
* different busses) to use when testing, and allocate one thread per
* test. So discovery is simplified, and we have no device naming issues.
*
* Don't use these only as stress/load tests. Use them along with with
* other USB bus activity: plugging, unplugging, mousing, mp3 playback,
* video capture, and so on. Run different tests at different times, in
* different sequences. Nothing here should interact with other devices,
* except indirectly by consuming USB bandwidth and CPU resources for test
* threads and request completion. But the only way to know that for sure
* is to test when HC queues are in use by many devices.
*/
static int
usbtest_ioctl (struct usb_interface *intf, unsigned int code, void *buf)
{
struct usbtest_dev *dev = usb_get_intfdata (intf);
struct usb_device *udev = testdev_to_usbdev (dev);
struct usbtest_param *param = buf;
int retval = -EOPNOTSUPP;
struct urb *urb;
struct scatterlist *sg;
struct usb_sg_request req;
struct timeval start;
unsigned i;
// FIXME USBDEVFS_CONNECTINFO doesn't say how fast the device is.
if (code != USBTEST_REQUEST)
return -EOPNOTSUPP;
if (param->iterations <= 0 || param->length < 0
|| param->sglen < 0 || param->vary < 0)
return -EINVAL;
if (down_interruptible (&dev->sem))
return -ERESTARTSYS;
if (intf->dev.power.power_state.event != PM_EVENT_ON) {
up (&dev->sem);
return -EHOSTUNREACH;
}
/* some devices, like ez-usb default devices, need a non-default
* altsetting to have any active endpoints. some tests change
* altsettings; force a default so most tests don't need to check.
*/
if (dev->info->alt >= 0) {
int res;
if (intf->altsetting->desc.bInterfaceNumber) {
up (&dev->sem);
return -ENODEV;
}
res = set_altsetting (dev, dev->info->alt);
if (res) {
dev_err (&intf->dev,
"set altsetting to %d failed, %d\n",
dev->info->alt, res);
up (&dev->sem);
return res;
}
}
/*
* Just a bunch of test cases that every HCD is expected to handle.
*
* Some may need specific firmware, though it'd be good to have
* one firmware image to handle all the test cases.
*
* FIXME add more tests! cancel requests, verify the data, control
* queueing, concurrent read+write threads, and so on.
*/
do_gettimeofday (&start);
switch (param->test_num) {
case 0:
dev_dbg (&intf->dev, "TEST 0: NOP\n");
retval = 0;
break;
/* Simple non-queued bulk I/O tests */
case 1:
if (dev->out_pipe == 0)
break;
dev_dbg (&intf->dev,
"TEST 1: write %d bytes %u times\n",
param->length, param->iterations);
urb = simple_alloc_urb (udev, dev->out_pipe, param->length);
if (!urb) {
retval = -ENOMEM;
break;
}
// FIRMWARE: bulk sink (maybe accepts short writes)
retval = simple_io (urb, param->iterations, 0, 0, "test1");
simple_free_urb (urb);
break;
case 2:
if (dev->in_pipe == 0)
break;
dev_dbg (&intf->dev,
"TEST 2: read %d bytes %u times\n",
param->length, param->iterations);
urb = simple_alloc_urb (udev, dev->in_pipe, param->length);
if (!urb) {
retval = -ENOMEM;
break;
}
// FIRMWARE: bulk source (maybe generates short writes)
retval = simple_io (urb, param->iterations, 0, 0, "test2");
simple_free_urb (urb);
break;
case 3:
if (dev->out_pipe == 0 || param->vary == 0)
break;
dev_dbg (&intf->dev,
"TEST 3: write/%d 0..%d bytes %u times\n",
param->vary, param->length, param->iterations);
urb = simple_alloc_urb (udev, dev->out_pipe, param->length);
if (!urb) {
retval = -ENOMEM;
break;
}
// FIRMWARE: bulk sink (maybe accepts short writes)
retval = simple_io (urb, param->iterations, param->vary,
0, "test3");
simple_free_urb (urb);
break;
case 4:
if (dev->in_pipe == 0 || param->vary == 0)
break;
dev_dbg (&intf->dev,
"TEST 4: read/%d 0..%d bytes %u times\n",
param->vary, param->length, param->iterations);
urb = simple_alloc_urb (udev, dev->in_pipe, param->length);
if (!urb) {
retval = -ENOMEM;
break;
}
// FIRMWARE: bulk source (maybe generates short writes)
retval = simple_io (urb, param->iterations, param->vary,
0, "test4");
simple_free_urb (urb);
break;
/* Queued bulk I/O tests */
case 5:
if (dev->out_pipe == 0 || param->sglen == 0)
break;
dev_dbg (&intf->dev,
"TEST 5: write %d sglists %d entries of %d bytes\n",
param->iterations,
param->sglen, param->length);
sg = alloc_sglist (param->sglen, param->length, 0);
if (!sg) {
retval = -ENOMEM;
break;
}
// FIRMWARE: bulk sink (maybe accepts short writes)
retval = perform_sglist (udev, param->iterations, dev->out_pipe,
&req, sg, param->sglen);
free_sglist (sg, param->sglen);
break;
case 6:
if (dev->in_pipe == 0 || param->sglen == 0)
break;
dev_dbg (&intf->dev,
"TEST 6: read %d sglists %d entries of %d bytes\n",
param->iterations,
param->sglen, param->length);
sg = alloc_sglist (param->sglen, param->length, 0);
if (!sg) {
retval = -ENOMEM;
break;
}
// FIRMWARE: bulk source (maybe generates short writes)
retval = perform_sglist (udev, param->iterations, dev->in_pipe,
&req, sg, param->sglen);
free_sglist (sg, param->sglen);
break;
case 7:
if (dev->out_pipe == 0 || param->sglen == 0 || param->vary == 0)
break;
dev_dbg (&intf->dev,
"TEST 7: write/%d %d sglists %d entries 0..%d bytes\n",
param->vary, param->iterations,
param->sglen, param->length);
sg = alloc_sglist (param->sglen, param->length, param->vary);
if (!sg) {
retval = -ENOMEM;
break;
}
// FIRMWARE: bulk sink (maybe accepts short writes)
retval = perform_sglist (udev, param->iterations, dev->out_pipe,
&req, sg, param->sglen);
free_sglist (sg, param->sglen);
break;
case 8:
if (dev->in_pipe == 0 || param->sglen == 0 || param->vary == 0)
break;
dev_dbg (&intf->dev,
"TEST 8: read/%d %d sglists %d entries 0..%d bytes\n",
param->vary, param->iterations,
param->sglen, param->length);
sg = alloc_sglist (param->sglen, param->length, param->vary);
if (!sg) {
retval = -ENOMEM;
break;
}
// FIRMWARE: bulk source (maybe generates short writes)
retval = perform_sglist (udev, param->iterations, dev->in_pipe,
&req, sg, param->sglen);
free_sglist (sg, param->sglen);
break;
/* non-queued sanity tests for control (chapter 9 subset) */
case 9:
retval = 0;
dev_dbg (&intf->dev,
"TEST 9: ch9 (subset) control tests, %d times\n",
param->iterations);
for (i = param->iterations; retval == 0 && i--; /* NOP */)
retval = ch9_postconfig (dev);
if (retval)
dbg ("ch9 subset failed, iterations left %d", i);
break;
/* queued control messaging */
case 10:
if (param->sglen == 0)
break;
retval = 0;
dev_dbg (&intf->dev,
"TEST 10: queue %d control calls, %d times\n",
param->sglen,
param->iterations);
retval = test_ctrl_queue (dev, param);
break;
/* simple non-queued unlinks (ring with one urb) */
case 11:
if (dev->in_pipe == 0 || !param->length)
break;
retval = 0;
dev_dbg (&intf->dev, "TEST 11: unlink %d reads of %d\n",
param->iterations, param->length);
for (i = param->iterations; retval == 0 && i--; /* NOP */)
retval = unlink_simple (dev, dev->in_pipe,
param->length);
if (retval)
dev_dbg (&intf->dev, "unlink reads failed %d, "
"iterations left %d\n", retval, i);
break;
case 12:
if (dev->out_pipe == 0 || !param->length)
break;
retval = 0;
dev_dbg (&intf->dev, "TEST 12: unlink %d writes of %d\n",
param->iterations, param->length);
for (i = param->iterations; retval == 0 && i--; /* NOP */)
retval = unlink_simple (dev, dev->out_pipe,
param->length);
if (retval)
dev_dbg (&intf->dev, "unlink writes failed %d, "
"iterations left %d\n", retval, i);
break;
/* ep halt tests */
case 13:
if (dev->out_pipe == 0 && dev->in_pipe == 0)
break;
retval = 0;
dev_dbg (&intf->dev, "TEST 13: set/clear %d halts\n",
param->iterations);
for (i = param->iterations; retval == 0 && i--; /* NOP */)
retval = halt_simple (dev);
if (retval)
DBG (dev, "halts failed, iterations left %d\n", i);
break;
/* control write tests */
case 14:
if (!dev->info->ctrl_out)
break;
dev_dbg (&intf->dev, "TEST 14: %d ep0out, %d..%d vary %d\n",
param->iterations,
realworld ? 1 : 0, param->length,
param->vary);
retval = ctrl_out (dev, param->iterations,
param->length, param->vary);
break;
/* iso write tests */
case 15:
if (dev->out_iso_pipe == 0 || param->sglen == 0)
break;
dev_dbg (&intf->dev,
"TEST 15: write %d iso, %d entries of %d bytes\n",
param->iterations,
param->sglen, param->length);
// FIRMWARE: iso sink
retval = test_iso_queue (dev, param,
dev->out_iso_pipe, dev->iso_out);
break;
/* iso read tests */
case 16:
if (dev->in_iso_pipe == 0 || param->sglen == 0)
break;
dev_dbg (&intf->dev,
"TEST 16: read %d iso, %d entries of %d bytes\n",
param->iterations,
param->sglen, param->length);
// FIRMWARE: iso source
retval = test_iso_queue (dev, param,
dev->in_iso_pipe, dev->iso_in);
break;
// FIXME unlink from queue (ring with N urbs)
// FIXME scatterlist cancel (needs helper thread)
}
do_gettimeofday (&param->duration);
param->duration.tv_sec -= start.tv_sec;
param->duration.tv_usec -= start.tv_usec;
if (param->duration.tv_usec < 0) {
param->duration.tv_usec += 1000 * 1000;
param->duration.tv_sec -= 1;
}
up (&dev->sem);
return retval;
}
/*-------------------------------------------------------------------------*/
static unsigned force_interrupt = 0;
module_param (force_interrupt, uint, 0);
MODULE_PARM_DESC (force_interrupt, "0 = test default; else interrupt");
#ifdef GENERIC
static unsigned short vendor;
module_param(vendor, ushort, 0);
MODULE_PARM_DESC (vendor, "vendor code (from usb-if)");
static unsigned short product;
module_param(product, ushort, 0);
MODULE_PARM_DESC (product, "product code (from vendor)");
#endif
static int
usbtest_probe (struct usb_interface *intf, const struct usb_device_id *id)
{
struct usb_device *udev;
struct usbtest_dev *dev;
struct usbtest_info *info;
char *rtest, *wtest;
char *irtest, *iwtest;
udev = interface_to_usbdev (intf);
#ifdef GENERIC
/* specify devices by module parameters? */
if (id->match_flags == 0) {
/* vendor match required, product match optional */
if (!vendor || le16_to_cpu(udev->descriptor.idVendor) != (u16)vendor)
return -ENODEV;
if (product && le16_to_cpu(udev->descriptor.idProduct) != (u16)product)
return -ENODEV;
dbg ("matched module params, vend=0x%04x prod=0x%04x",
le16_to_cpu(udev->descriptor.idVendor),
le16_to_cpu(udev->descriptor.idProduct));
}
#endif
dev = kzalloc(sizeof(*dev), SLAB_KERNEL);
if (!dev)
return -ENOMEM;
info = (struct usbtest_info *) id->driver_info;
dev->info = info;
init_MUTEX (&dev->sem);
dev->intf = intf;
/* cacheline-aligned scratch for i/o */
if ((dev->buf = kmalloc (TBUF_SIZE, SLAB_KERNEL)) == NULL) {
kfree (dev);
return -ENOMEM;
}
/* NOTE this doesn't yet test the handful of difference that are
* visible with high speed interrupts: bigger maxpacket (1K) and
* "high bandwidth" modes (up to 3 packets/uframe).
*/
rtest = wtest = "";
irtest = iwtest = "";
if (force_interrupt || udev->speed == USB_SPEED_LOW) {
if (info->ep_in) {
dev->in_pipe = usb_rcvintpipe (udev, info->ep_in);
rtest = " intr-in";
}
if (info->ep_out) {
dev->out_pipe = usb_sndintpipe (udev, info->ep_out);
wtest = " intr-out";
}
} else {
if (info->autoconf) {
int status;
status = get_endpoints (dev, intf);
if (status < 0) {
dbg ("couldn't get endpoints, %d\n", status);
return status;
}
/* may find bulk or ISO pipes */
} else {
if (info->ep_in)
dev->in_pipe = usb_rcvbulkpipe (udev,
info->ep_in);
if (info->ep_out)
dev->out_pipe = usb_sndbulkpipe (udev,
info->ep_out);
}
if (dev->in_pipe)
rtest = " bulk-in";
if (dev->out_pipe)
wtest = " bulk-out";
if (dev->in_iso_pipe)
irtest = " iso-in";
if (dev->out_iso_pipe)
iwtest = " iso-out";
}
usb_set_intfdata (intf, dev);
dev_info (&intf->dev, "%s\n", info->name);
dev_info (&intf->dev, "%s speed {control%s%s%s%s%s} tests%s\n",
({ char *tmp;
switch (udev->speed) {
case USB_SPEED_LOW: tmp = "low"; break;
case USB_SPEED_FULL: tmp = "full"; break;
case USB_SPEED_HIGH: tmp = "high"; break;
default: tmp = "unknown"; break;
}; tmp; }),
info->ctrl_out ? " in/out" : "",
rtest, wtest,
irtest, iwtest,
info->alt >= 0 ? " (+alt)" : "");
return 0;
}
static int usbtest_suspend (struct usb_interface *intf, pm_message_t message)
{
return 0;
}
static int usbtest_resume (struct usb_interface *intf)
{
return 0;
}
static void usbtest_disconnect (struct usb_interface *intf)
{
struct usbtest_dev *dev = usb_get_intfdata (intf);
down (&dev->sem);
usb_set_intfdata (intf, NULL);
dev_dbg (&intf->dev, "disconnect\n");
kfree (dev);
}
/* Basic testing only needs a device that can source or sink bulk traffic.
* Any device can test control transfers (default with GENERIC binding).
*
* Several entries work with the default EP0 implementation that's built
* into EZ-USB chips. There's a default vendor ID which can be overridden
* by (very) small config EEPROMS, but otherwise all these devices act
* identically until firmware is loaded: only EP0 works. It turns out
* to be easy to make other endpoints work, without modifying that EP0
* behavior. For now, we expect that kind of firmware.
*/
/* an21xx or fx versions of ez-usb */
static struct usbtest_info ez1_info = {
.name = "EZ-USB device",
.ep_in = 2,
.ep_out = 2,
.alt = 1,
};
/* fx2 version of ez-usb */
static struct usbtest_info ez2_info = {
.name = "FX2 device",
.ep_in = 6,
.ep_out = 2,
.alt = 1,
};
/* ezusb family device with dedicated usb test firmware,
*/
static struct usbtest_info fw_info = {
.name = "usb test device",
.ep_in = 2,
.ep_out = 2,
.alt = 1,
.autoconf = 1, // iso and ctrl_out need autoconf
.ctrl_out = 1,
.iso = 1, // iso_ep's are #8 in/out
};
/* peripheral running Linux and 'zero.c' test firmware, or
* its user-mode cousin. different versions of this use
* different hardware with the same vendor/product codes.
* host side MUST rely on the endpoint descriptors.
*/
static struct usbtest_info gz_info = {
.name = "Linux gadget zero",
.autoconf = 1,
.ctrl_out = 1,
.alt = 0,
};
static struct usbtest_info um_info = {
.name = "Linux user mode test driver",
.autoconf = 1,
.alt = -1,
};
static struct usbtest_info um2_info = {
.name = "Linux user mode ISO test driver",
.autoconf = 1,
.iso = 1,
.alt = -1,
};
#ifdef IBOT2
/* this is a nice source of high speed bulk data;
* uses an FX2, with firmware provided in the device
*/
static struct usbtest_info ibot2_info = {
.name = "iBOT2 webcam",
.ep_in = 2,
.alt = -1,
};
#endif
#ifdef GENERIC
/* we can use any device to test control traffic */
static struct usbtest_info generic_info = {
.name = "Generic USB device",
.alt = -1,
};
#endif
// FIXME remove this
static struct usbtest_info hact_info = {
.name = "FX2/hact",
//.ep_in = 6,
.ep_out = 2,
.alt = -1,
};
static struct usb_device_id id_table [] = {
{ USB_DEVICE (0x0547, 0x1002),
.driver_info = (unsigned long) &hact_info,
},
/*-------------------------------------------------------------*/
/* EZ-USB devices which download firmware to replace (or in our
* case augment) the default device implementation.
*/
/* generic EZ-USB FX controller */
{ USB_DEVICE (0x0547, 0x2235),
.driver_info = (unsigned long) &ez1_info,
},
/* CY3671 development board with EZ-USB FX */
{ USB_DEVICE (0x0547, 0x0080),
.driver_info = (unsigned long) &ez1_info,
},
/* generic EZ-USB FX2 controller (or development board) */
{ USB_DEVICE (0x04b4, 0x8613),
.driver_info = (unsigned long) &ez2_info,
},
/* re-enumerated usb test device firmware */
{ USB_DEVICE (0xfff0, 0xfff0),
.driver_info = (unsigned long) &fw_info,
},
/* "Gadget Zero" firmware runs under Linux */
{ USB_DEVICE (0x0525, 0xa4a0),
.driver_info = (unsigned long) &gz_info,
},
/* so does a user-mode variant */
{ USB_DEVICE (0x0525, 0xa4a4),
.driver_info = (unsigned long) &um_info,
},
/* ... and a user-mode variant that talks iso */
{ USB_DEVICE (0x0525, 0xa4a3),
.driver_info = (unsigned long) &um2_info,
},
#ifdef KEYSPAN_19Qi
/* Keyspan 19qi uses an21xx (original EZ-USB) */
// this does not coexist with the real Keyspan 19qi driver!
{ USB_DEVICE (0x06cd, 0x010b),
.driver_info = (unsigned long) &ez1_info,
},
#endif
/*-------------------------------------------------------------*/
#ifdef IBOT2
/* iBOT2 makes a nice source of high speed bulk-in data */
// this does not coexist with a real iBOT2 driver!
{ USB_DEVICE (0x0b62, 0x0059),
.driver_info = (unsigned long) &ibot2_info,
},
#endif
/*-------------------------------------------------------------*/
#ifdef GENERIC
/* module params can specify devices to use for control tests */
{ .driver_info = (unsigned long) &generic_info, },
#endif
/*-------------------------------------------------------------*/
{ }
};
MODULE_DEVICE_TABLE (usb, id_table);
static struct usb_driver usbtest_driver = {
.name = "usbtest",
.id_table = id_table,
.probe = usbtest_probe,
.ioctl = usbtest_ioctl,
.disconnect = usbtest_disconnect,
.suspend = usbtest_suspend,
.resume = usbtest_resume,
};
/*-------------------------------------------------------------------------*/
static int __init usbtest_init (void)
{
#ifdef GENERIC
if (vendor)
dbg ("params: vend=0x%04x prod=0x%04x", vendor, product);
#endif
return usb_register (&usbtest_driver);
}
module_init (usbtest_init);
static void __exit usbtest_exit (void)
{
usb_deregister (&usbtest_driver);
}
module_exit (usbtest_exit);
MODULE_DESCRIPTION ("USB Core/HCD Testing Driver");
MODULE_LICENSE ("GPL");
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