diff options
Diffstat (limited to 'drivers/usb/misc/usbtest.c')
| -rw-r--r-- | drivers/usb/misc/usbtest.c | 3078 |
1 files changed, 3078 insertions, 0 deletions
diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c new file mode 100644 index 000000000..ac0d75ac2 --- /dev/null +++ b/drivers/usb/misc/usbtest.c @@ -0,0 +1,3078 @@ +// SPDX-License-Identifier: GPL-2.0 +#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/mutex.h> +#include <linux/timer.h> +#include <linux/usb.h> + +#define SIMPLE_IO_TIMEOUT 10000 /* in milliseconds */ + +/*-------------------------------------------------------------------------*/ + +static int override_alt = -1; +module_param_named(alt, override_alt, int, 0644); +MODULE_PARM_DESC(alt, ">= 0 to override altsetting selection"); +static void complicated_callback(struct urb *urb); + +/*-------------------------------------------------------------------------*/ + +/* FIXME make these public somewhere; usbdevfs.h? */ + +/* Parameter for usbtest driver. */ +struct usbtest_param_32 { + /* inputs */ + __u32 test_num; /* 0..(TEST_CASES-1) */ + __u32 iterations; + __u32 length; + __u32 vary; + __u32 sglen; + + /* outputs */ + __s32 duration_sec; + __s32 duration_usec; +}; + +/* + * Compat parameter to the usbtest driver. + * This supports older user space binaries compiled with 64 bit compiler. + */ +struct usbtest_param_64 { + /* inputs */ + __u32 test_num; /* 0..(TEST_CASES-1) */ + __u32 iterations; + __u32 length; + __u32 vary; + __u32 sglen; + + /* outputs */ + __s64 duration_sec; + __s64 duration_usec; +}; + +/* IOCTL interface to the driver. */ +#define USBTEST_REQUEST_32 _IOWR('U', 100, struct usbtest_param_32) +/* COMPAT IOCTL interface to the driver. */ +#define USBTEST_REQUEST_64 _IOWR('U', 100, struct usbtest_param_64) + +/*-------------------------------------------------------------------------*/ + +#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 */ + unsigned intr:1; /* try interrupt 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; + int in_int_pipe; + int out_int_pipe; + struct usb_endpoint_descriptor *iso_in, *iso_out; + struct usb_endpoint_descriptor *int_in, *int_out; + struct mutex lock; + +#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 ERROR(tdev, fmt, args...) \ + dev_err(&(tdev)->intf->dev , fmt , ## args) +#define WARNING(tdev, fmt, args...) \ + dev_warn(&(tdev)->intf->dev , fmt , ## args) + +#define GUARD_BYTE 0xA5 +#define MAX_SGLEN 128 + +/*-------------------------------------------------------------------------*/ + +static inline void endpoint_update(int edi, + struct usb_host_endpoint **in, + struct usb_host_endpoint **out, + struct usb_host_endpoint *e) +{ + if (edi) { + if (!*in) + *in = e; + } else { + if (!*out) + *out = e; + } +} + +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_host_endpoint *int_in, *int_out; + struct usb_device *udev; + + for (tmp = 0; tmp < intf->num_altsetting; tmp++) { + unsigned ep; + + in = out = NULL; + iso_in = iso_out = NULL; + int_in = int_out = NULL; + alt = intf->altsetting + tmp; + + if (override_alt >= 0 && + override_alt != alt->desc.bAlternateSetting) + continue; + + /* take the first altsetting with in-bulk + out-bulk; + * ignore other endpoints and altsettings. + */ + for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) { + struct usb_host_endpoint *e; + int edi; + + e = alt->endpoint + ep; + edi = usb_endpoint_dir_in(&e->desc); + + switch (usb_endpoint_type(&e->desc)) { + case USB_ENDPOINT_XFER_BULK: + endpoint_update(edi, &in, &out, e); + continue; + case USB_ENDPOINT_XFER_INT: + if (dev->info->intr) + endpoint_update(edi, &int_in, &int_out, e); + continue; + case USB_ENDPOINT_XFER_ISOC: + if (dev->info->iso) + endpoint_update(edi, &iso_in, &iso_out, e); + fallthrough; + default: + continue; + } + } + if ((in && out) || iso_in || iso_out || int_in || int_out) + goto found; + } + return -EINVAL; + +found: + udev = testdev_to_usbdev(dev); + dev->info->alt = alt->desc.bAlternateSetting; + 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); + if (out) + 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); + } + + if (iso_out) { + dev->iso_out = &iso_out->desc; + dev->out_iso_pipe = usb_sndisocpipe(udev, + iso_out->desc.bEndpointAddress + & USB_ENDPOINT_NUMBER_MASK); + } + + if (int_in) { + dev->int_in = &int_in->desc; + dev->in_int_pipe = usb_rcvintpipe(udev, + int_in->desc.bEndpointAddress + & USB_ENDPOINT_NUMBER_MASK); + } + + if (int_out) { + dev->int_out = &int_out->desc; + dev->out_int_pipe = usb_sndintpipe(udev, + int_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(urb->context); +} + +static struct urb *usbtest_alloc_urb( + struct usb_device *udev, + int pipe, + unsigned long bytes, + unsigned transfer_flags, + unsigned offset, + u8 bInterval, + usb_complete_t complete_fn) +{ + struct urb *urb; + + urb = usb_alloc_urb(0, GFP_KERNEL); + if (!urb) + return urb; + + if (bInterval) + usb_fill_int_urb(urb, udev, pipe, NULL, bytes, complete_fn, + NULL, bInterval); + else + usb_fill_bulk_urb(urb, udev, pipe, NULL, bytes, complete_fn, + NULL); + + urb->interval = (udev->speed == USB_SPEED_HIGH) + ? (INTERRUPT_RATE << 3) + : INTERRUPT_RATE; + urb->transfer_flags = transfer_flags; + if (usb_pipein(pipe)) + urb->transfer_flags |= URB_SHORT_NOT_OK; + + if ((bytes + offset) == 0) + return urb; + + if (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP) + urb->transfer_buffer = usb_alloc_coherent(udev, bytes + offset, + GFP_KERNEL, &urb->transfer_dma); + else + urb->transfer_buffer = kmalloc(bytes + offset, GFP_KERNEL); + + if (!urb->transfer_buffer) { + usb_free_urb(urb); + return NULL; + } + + /* To test unaligned transfers add an offset and fill the + unused memory with a guard value */ + if (offset) { + memset(urb->transfer_buffer, GUARD_BYTE, offset); + urb->transfer_buffer += offset; + if (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP) + urb->transfer_dma += offset; + } + + /* For inbound transfers use guard byte so that test fails if + data not correctly copied */ + memset(urb->transfer_buffer, + usb_pipein(urb->pipe) ? GUARD_BYTE : 0, + bytes); + return urb; +} + +static struct urb *simple_alloc_urb( + struct usb_device *udev, + int pipe, + unsigned long bytes, + u8 bInterval) +{ + return usbtest_alloc_urb(udev, pipe, bytes, URB_NO_TRANSFER_DMA_MAP, 0, + bInterval, simple_callback); +} + +static struct urb *complicated_alloc_urb( + struct usb_device *udev, + int pipe, + unsigned long bytes, + u8 bInterval) +{ + return usbtest_alloc_urb(udev, pipe, bytes, URB_NO_TRANSFER_DMA_MAP, 0, + bInterval, complicated_callback); +} + +static unsigned pattern; +static unsigned mod_pattern; +module_param_named(pattern, mod_pattern, uint, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(mod_pattern, "i/o pattern (0 == zeroes)"); + +static unsigned get_maxpacket(struct usb_device *udev, int pipe) +{ + struct usb_host_endpoint *ep; + + ep = usb_pipe_endpoint(udev, pipe); + return le16_to_cpup(&ep->desc.wMaxPacketSize); +} + +static int ss_isoc_get_packet_num(struct usb_device *udev, int pipe) +{ + struct usb_host_endpoint *ep = usb_pipe_endpoint(udev, pipe); + + return USB_SS_MULT(ep->ss_ep_comp.bmAttributes) + * (1 + ep->ss_ep_comp.bMaxBurst); +} + +static void simple_fill_buf(struct urb *urb) +{ + unsigned i; + u8 *buf = urb->transfer_buffer; + unsigned len = urb->transfer_buffer_length; + unsigned maxpacket; + + switch (pattern) { + default: + fallthrough; + case 0: + memset(buf, 0, len); + break; + case 1: /* mod63 */ + maxpacket = get_maxpacket(urb->dev, urb->pipe); + for (i = 0; i < len; i++) + *buf++ = (u8) ((i % maxpacket) % 63); + break; + } +} + +static inline unsigned long buffer_offset(void *buf) +{ + return (unsigned long)buf & (ARCH_KMALLOC_MINALIGN - 1); +} + +static int check_guard_bytes(struct usbtest_dev *tdev, struct urb *urb) +{ + u8 *buf = urb->transfer_buffer; + u8 *guard = buf - buffer_offset(buf); + unsigned i; + + for (i = 0; guard < buf; i++, guard++) { + if (*guard != GUARD_BYTE) { + ERROR(tdev, "guard byte[%d] %d (not %d)\n", + i, *guard, GUARD_BYTE); + return -EINVAL; + } + } + return 0; +} + +static int simple_check_buf(struct usbtest_dev *tdev, struct urb *urb) +{ + unsigned i; + u8 expected; + u8 *buf = urb->transfer_buffer; + unsigned len = urb->actual_length; + unsigned maxpacket = get_maxpacket(urb->dev, urb->pipe); + + int ret = check_guard_bytes(tdev, urb); + if (ret) + return ret; + + 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 % maxpacket) % 63; + break; + /* always fail unsupported patterns */ + default: + expected = !*buf; + break; + } + if (*buf == expected) + continue; + ERROR(tdev, "buf[%d] = %d (not %d)\n", i, *buf, expected); + return -EINVAL; + } + return 0; +} + +static void simple_free_urb(struct urb *urb) +{ + unsigned long offset = buffer_offset(urb->transfer_buffer); + + if (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP) + usb_free_coherent( + urb->dev, + urb->transfer_buffer_length + offset, + urb->transfer_buffer - offset, + urb->transfer_dma - offset); + else + kfree(urb->transfer_buffer - offset); + usb_free_urb(urb); +} + +static int simple_io( + struct usbtest_dev *tdev, + 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; + unsigned long expire; + + urb->context = &completion; + while (retval == 0 && iterations-- > 0) { + init_completion(&completion); + if (usb_pipeout(urb->pipe)) { + simple_fill_buf(urb); + urb->transfer_flags |= URB_ZERO_PACKET; + } + retval = usb_submit_urb(urb, GFP_KERNEL); + if (retval != 0) + break; + + expire = msecs_to_jiffies(SIMPLE_IO_TIMEOUT); + if (!wait_for_completion_timeout(&completion, expire)) { + usb_kill_urb(urb); + retval = (urb->status == -ENOENT ? + -ETIMEDOUT : urb->status); + } else { + retval = urb->status; + } + + urb->dev = udev; + if (retval == 0 && usb_pipein(urb->pipe)) + retval = simple_check_buf(tdev, 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_err(&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_page(&sg[i])) + continue; + kfree(sg_virt(&sg[i])); + } + kfree(sg); +} + +static struct scatterlist * +alloc_sglist(int nents, int max, int vary, struct usbtest_dev *dev, int pipe) +{ + struct scatterlist *sg; + unsigned int n_size = 0; + unsigned i; + unsigned size = max; + unsigned maxpacket = + get_maxpacket(interface_to_usbdev(dev->intf), pipe); + + if (max == 0) + return NULL; + + sg = kmalloc_array(nents, sizeof(*sg), GFP_KERNEL); + if (!sg) + return NULL; + sg_init_table(sg, nents); + + for (i = 0; i < nents; i++) { + char *buf; + unsigned j; + + buf = kzalloc(size, GFP_KERNEL); + if (!buf) { + free_sglist(sg, i); + return NULL; + } + + /* kmalloc pages are always physically contiguous! */ + sg_set_buf(&sg[i], buf, size); + + switch (pattern) { + case 0: + /* already zeroed */ + break; + case 1: + for (j = 0; j < size; j++) + *buf++ = (u8) (((j + n_size) % maxpacket) % 63); + n_size += size; + break; + } + + if (vary) { + size += vary; + size %= max; + if (size == 0) + size = (vary < max) ? vary : max; + } + } + + return sg; +} + +struct sg_timeout { + struct timer_list timer; + struct usb_sg_request *req; +}; + +static void sg_timeout(struct timer_list *t) +{ + struct sg_timeout *timeout = from_timer(timeout, t, timer); + + usb_sg_cancel(timeout->req); +} + +static int perform_sglist( + struct usbtest_dev *tdev, + unsigned iterations, + int pipe, + struct usb_sg_request *req, + struct scatterlist *sg, + int nents +) +{ + struct usb_device *udev = testdev_to_usbdev(tdev); + int retval = 0; + struct sg_timeout timeout = { + .req = req, + }; + + timer_setup_on_stack(&timeout.timer, sg_timeout, 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, GFP_KERNEL); + + if (retval) + break; + mod_timer(&timeout.timer, jiffies + + msecs_to_jiffies(SIMPLE_IO_TIMEOUT)); + usb_sg_wait(req); + if (!del_timer_sync(&timeout.timer)) + retval = -ETIMEDOUT; + else + retval = req->status; + destroy_timer_on_stack(&timeout.timer); + + /* 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) + ERROR(tdev, "perform_sglist failed, " + "iterations left %d, status %d\n", + 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(struct usbtest_dev *tdev, int len) +{ + struct usb_config_descriptor *config; + + if (len < sizeof(*config)) + return 0; + config = (struct usb_config_descriptor *) tdev->buf; + + switch (config->bDescriptorType) { + case USB_DT_CONFIG: + case USB_DT_OTHER_SPEED_CONFIG: + if (config->bLength != 9) { + ERROR(tdev, "bogus config descriptor length\n"); + return 0; + } + /* this bit 'must be 1' but often isn't */ + if (!realworld && !(config->bmAttributes & 0x80)) { + ERROR(tdev, "high bit of config attributes not set\n"); + return 0; + } + if (config->bmAttributes & 0x1f) { /* reserved == 0 */ + ERROR(tdev, "reserved config bits set\n"); + 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; + ERROR(tdev, "bogus config descriptor read size\n"); + return 0; +} + +static int is_good_ext(struct usbtest_dev *tdev, u8 *buf) +{ + struct usb_ext_cap_descriptor *ext; + u32 attr; + + ext = (struct usb_ext_cap_descriptor *) buf; + + if (ext->bLength != USB_DT_USB_EXT_CAP_SIZE) { + ERROR(tdev, "bogus usb 2.0 extension descriptor length\n"); + return 0; + } + + attr = le32_to_cpu(ext->bmAttributes); + /* bits[1:15] is used and others are reserved */ + if (attr & ~0xfffe) { /* reserved == 0 */ + ERROR(tdev, "reserved bits set\n"); + return 0; + } + + return 1; +} + +static int is_good_ss_cap(struct usbtest_dev *tdev, u8 *buf) +{ + struct usb_ss_cap_descriptor *ss; + + ss = (struct usb_ss_cap_descriptor *) buf; + + if (ss->bLength != USB_DT_USB_SS_CAP_SIZE) { + ERROR(tdev, "bogus superspeed device capability descriptor length\n"); + return 0; + } + + /* + * only bit[1] of bmAttributes is used for LTM and others are + * reserved + */ + if (ss->bmAttributes & ~0x02) { /* reserved == 0 */ + ERROR(tdev, "reserved bits set in bmAttributes\n"); + return 0; + } + + /* bits[0:3] of wSpeedSupported is used and others are reserved */ + if (le16_to_cpu(ss->wSpeedSupported) & ~0x0f) { /* reserved == 0 */ + ERROR(tdev, "reserved bits set in wSpeedSupported\n"); + return 0; + } + + return 1; +} + +static int is_good_con_id(struct usbtest_dev *tdev, u8 *buf) +{ + struct usb_ss_container_id_descriptor *con_id; + + con_id = (struct usb_ss_container_id_descriptor *) buf; + + if (con_id->bLength != USB_DT_USB_SS_CONTN_ID_SIZE) { + ERROR(tdev, "bogus container id descriptor length\n"); + return 0; + } + + if (con_id->bReserved) { /* reserved == 0 */ + ERROR(tdev, "reserved bits set\n"); + return 0; + } + + return 1; +} + +/* 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_err(&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_err(&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_err(&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_err(&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_err(&iface->dev, "dev descriptor --> %d\n", retval); + return (retval < 0) ? retval : -EDOM; + } + + /* + * there's always [9.4.3] a bos device descriptor [9.6.2] in USB + * 3.0 spec + */ + if (le16_to_cpu(udev->descriptor.bcdUSB) >= 0x0210) { + struct usb_bos_descriptor *bos = NULL; + struct usb_dev_cap_header *header = NULL; + unsigned total, num, length; + u8 *buf; + + retval = usb_get_descriptor(udev, USB_DT_BOS, 0, dev->buf, + sizeof(*udev->bos->desc)); + if (retval != sizeof(*udev->bos->desc)) { + dev_err(&iface->dev, "bos descriptor --> %d\n", retval); + return (retval < 0) ? retval : -EDOM; + } + + bos = (struct usb_bos_descriptor *)dev->buf; + total = le16_to_cpu(bos->wTotalLength); + num = bos->bNumDeviceCaps; + + if (total > TBUF_SIZE) + total = TBUF_SIZE; + + /* + * get generic device-level capability descriptors [9.6.2] + * in USB 3.0 spec + */ + retval = usb_get_descriptor(udev, USB_DT_BOS, 0, dev->buf, + total); + if (retval != total) { + dev_err(&iface->dev, "bos descriptor set --> %d\n", + retval); + return (retval < 0) ? retval : -EDOM; + } + + length = sizeof(*udev->bos->desc); + buf = dev->buf; + for (i = 0; i < num; i++) { + buf += length; + if (buf + sizeof(struct usb_dev_cap_header) > + dev->buf + total) + break; + + header = (struct usb_dev_cap_header *)buf; + length = header->bLength; + + if (header->bDescriptorType != + USB_DT_DEVICE_CAPABILITY) { + dev_warn(&udev->dev, "not device capability descriptor, skip\n"); + continue; + } + + switch (header->bDevCapabilityType) { + case USB_CAP_TYPE_EXT: + if (buf + USB_DT_USB_EXT_CAP_SIZE > + dev->buf + total || + !is_good_ext(dev, buf)) { + dev_err(&iface->dev, "bogus usb 2.0 extension descriptor\n"); + return -EDOM; + } + break; + case USB_SS_CAP_TYPE: + if (buf + USB_DT_USB_SS_CAP_SIZE > + dev->buf + total || + !is_good_ss_cap(dev, buf)) { + dev_err(&iface->dev, "bogus superspeed device capability descriptor\n"); + return -EDOM; + } + break; + case CONTAINER_ID_TYPE: + if (buf + USB_DT_USB_SS_CONTN_ID_SIZE > + dev->buf + total || + !is_good_con_id(dev, buf)) { + dev_err(&iface->dev, "bogus container id descriptor\n"); + return -EDOM; + } + break; + default: + break; + } + } + } + + /* 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, retval)) { + dev_err(&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_err(&iface->dev, + "hs dev qualifier --> %d\n", + retval); + return retval; + } + /* usb2.0 but not high-speed capable; fine */ + } else if (retval != sizeof(struct usb_qualifier_descriptor)) { + dev_err(&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, retval)) { + dev_err(&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_std_status(udev, USB_RECIP_DEVICE, 0, dev->buf); + if (retval) { + dev_err(&iface->dev, "get dev status --> %d\n", retval); + return retval; + } + + /* 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_std_status(udev, USB_RECIP_INTERFACE, + iface->altsetting[0].desc.bInterfaceNumber, dev->buf); + if (retval) { + dev_err(&iface->dev, "get interface status --> %d\n", retval); + return retval; + } + /* 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_32 *param; + int last; +}; + +#define NUM_SUBCASES 16 /* 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; + unsigned long flags; + + reqp = (struct usb_ctrlrequest *)urb->setup_packet; + subcase = container_of(reqp, struct subcase, setup); + + spin_lock_irqsave(&ctx->lock, flags); + 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) { + ERROR(ctx->dev, + "subcase %d completed out of order, last %d\n", + 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 && ( + ((status == -subcase->expected /* happened */ + || status == 0)))) /* didn't */ + status = 0; + /* sometimes more than one fault is allowed */ + else if (subcase->number == 12 && status == -EPIPE) + status = 0; + else + ERROR(ctx->dev, "subtest %d error, status %d\n", + subcase->number, status); + } + + /* unexpected status codes mean errors; ideally, in hardware */ + if (status) { +error: + if (ctx->status == 0) { + int i; + + ctx->status = status; + ERROR(ctx->dev, "control queue %02x.%02x, err %d, " + "%d left, subcase %d, len %d/%d\n", + reqp->bRequestType, reqp->bRequest, + status, ctx->count, subcase->number, + urb->actual_length, + urb->transfer_buffer_length); + + /* 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: + ERROR(ctx->dev, "urb unlink --> %d\n", + status); + } + } + status = ctx->status; + } + } + + /* resubmit if we need to, else mark this as done */ + if ((status == 0) && (ctx->pending < ctx->count)) { + status = usb_submit_urb(urb, GFP_ATOMIC); + if (status != 0) { + ERROR(ctx->dev, + "can't resubmit ctrl %02x.%02x, err %d\n", + 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_irqrestore(&ctx->lock, flags); +} + +static int +test_ctrl_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param) +{ + struct usb_device *udev = testdev_to_usbdev(dev); + struct urb **urb; + struct ctrl_ctx context; + int i; + + if (param->sglen == 0 || param->iterations > UINT_MAX / param->sglen) + return -EOPNOTSUPP; + + 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 *), GFP_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; + + /* sign of this variable means: + * -: tested code must return this (negative) error code + * +: tested code may return this (negative too) error code + */ + 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 (MAY STALL) */ + 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 */ + if (udev->speed == USB_SPEED_SUPER) + len = 1024 - 512; + else + 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; + if (udev->speed == USB_SPEED_SUPER) + len = 512; + switch (len) { + case 8: + len = 24; + break; + case 16: + len = 32; + break; + } + expected = -EREMOTEIO; + break; + case 15: + req.wValue = cpu_to_le16(USB_DT_BOS << 8); + if (udev->bos) + len = le16_to_cpu(udev->bos->desc->wTotalLength); + else + len = sizeof(struct usb_bos_descriptor); + if (le16_to_cpu(udev->descriptor.bcdUSB) < 0x0201) + expected = -EPIPE; + break; + default: + ERROR(dev, "bogus number of ctrl queue testcases!\n"); + context.status = -EINVAL; + goto cleanup; + } + req.wLength = cpu_to_le16(len); + urb[i] = u = simple_alloc_urb(udev, pipe, len, 0); + if (!u) + goto cleanup; + + reqp = kmalloc(sizeof(*reqp), GFP_KERNEL); + if (!reqp) + goto cleanup; + reqp->setup = req; + reqp->number = i % NUM_SUBCASES; + reqp->expected = expected; + u->setup_packet = (char *) &reqp->setup; + + 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], GFP_ATOMIC); + if (context.status != 0) { + ERROR(dev, "can't submit urb[%d], status %d\n", + 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; + kfree(urb[i]->setup_packet); + 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, GFP_ATOMIC); + if (status) { + urb->status = status; + complete(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, 0); + if (!urb) + return -ENOMEM; + urb->context = &completion; + urb->complete = unlink1_callback; + + if (usb_pipeout(urb->pipe)) { + simple_fill_buf(urb); + urb->transfer_flags |= URB_ZERO_PACKET; + } + + /* 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. + */ + retval = usb_submit_urb(urb, GFP_KERNEL); + if (retval != 0) { + dev_err(&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) { + while (!completion_done(&completion)) { + retval = usb_unlink_urb(urb); + + if (retval == 0 && usb_pipein(urb->pipe)) + retval = simple_check_buf(dev, urb); + + switch (retval) { + case -EBUSY: + case -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. + */ + ERROR(dev, "unlink retry\n"); + continue; + case 0: + case -EINPROGRESS: + break; + + default: + dev_err(&dev->intf->dev, + "unlink fail %d\n", retval); + return retval; + } + + break; + } + } else + usb_kill_urb(urb); + + 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; +} + +/*-------------------------------------------------------------------------*/ + +struct queued_ctx { + struct completion complete; + atomic_t pending; + unsigned num; + int status; + struct urb **urbs; +}; + +static void unlink_queued_callback(struct urb *urb) +{ + int status = urb->status; + struct queued_ctx *ctx = urb->context; + + if (ctx->status) + goto done; + if (urb == ctx->urbs[ctx->num - 4] || urb == ctx->urbs[ctx->num - 2]) { + if (status == -ECONNRESET) + goto done; + /* What error should we report if the URB completed normally? */ + } + if (status != 0) + ctx->status = status; + + done: + if (atomic_dec_and_test(&ctx->pending)) + complete(&ctx->complete); +} + +static int unlink_queued(struct usbtest_dev *dev, int pipe, unsigned num, + unsigned size) +{ + struct queued_ctx ctx; + struct usb_device *udev = testdev_to_usbdev(dev); + void *buf; + dma_addr_t buf_dma; + int i; + int retval = -ENOMEM; + + init_completion(&ctx.complete); + atomic_set(&ctx.pending, 1); /* One more than the actual value */ + ctx.num = num; + ctx.status = 0; + + buf = usb_alloc_coherent(udev, size, GFP_KERNEL, &buf_dma); + if (!buf) + return retval; + memset(buf, 0, size); + + /* Allocate and init the urbs we'll queue */ + ctx.urbs = kcalloc(num, sizeof(struct urb *), GFP_KERNEL); + if (!ctx.urbs) + goto free_buf; + for (i = 0; i < num; i++) { + ctx.urbs[i] = usb_alloc_urb(0, GFP_KERNEL); + if (!ctx.urbs[i]) + goto free_urbs; + usb_fill_bulk_urb(ctx.urbs[i], udev, pipe, buf, size, + unlink_queued_callback, &ctx); + ctx.urbs[i]->transfer_dma = buf_dma; + ctx.urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP; + + if (usb_pipeout(ctx.urbs[i]->pipe)) { + simple_fill_buf(ctx.urbs[i]); + ctx.urbs[i]->transfer_flags |= URB_ZERO_PACKET; + } + } + + /* Submit all the URBs and then unlink URBs num - 4 and num - 2. */ + for (i = 0; i < num; i++) { + atomic_inc(&ctx.pending); + retval = usb_submit_urb(ctx.urbs[i], GFP_KERNEL); + if (retval != 0) { + dev_err(&dev->intf->dev, "submit urbs[%d] fail %d\n", + i, retval); + atomic_dec(&ctx.pending); + ctx.status = retval; + break; + } + } + if (i == num) { + usb_unlink_urb(ctx.urbs[num - 4]); + usb_unlink_urb(ctx.urbs[num - 2]); + } else { + while (--i >= 0) + usb_unlink_urb(ctx.urbs[i]); + } + + if (atomic_dec_and_test(&ctx.pending)) /* The extra count */ + complete(&ctx.complete); + wait_for_completion(&ctx.complete); + retval = ctx.status; + + free_urbs: + for (i = 0; i < num; i++) + usb_free_urb(ctx.urbs[i]); + kfree(ctx.urbs); + free_buf: + usb_free_coherent(udev, size, buf, buf_dma); + return retval; +} + +/*-------------------------------------------------------------------------*/ + +static int verify_not_halted(struct usbtest_dev *tdev, int ep, struct urb *urb) +{ + int retval; + u16 status; + + /* shouldn't look or act halted */ + retval = usb_get_std_status(urb->dev, USB_RECIP_ENDPOINT, ep, &status); + if (retval < 0) { + ERROR(tdev, "ep %02x couldn't get no-halt status, %d\n", + ep, retval); + return retval; + } + if (status != 0) { + ERROR(tdev, "ep %02x bogus status: %04x != 0\n", ep, status); + return -EINVAL; + } + retval = simple_io(tdev, urb, 1, 0, 0, __func__); + if (retval != 0) + return -EINVAL; + return 0; +} + +static int verify_halted(struct usbtest_dev *tdev, int ep, struct urb *urb) +{ + int retval; + u16 status; + + /* should look and act halted */ + retval = usb_get_std_status(urb->dev, USB_RECIP_ENDPOINT, ep, &status); + if (retval < 0) { + ERROR(tdev, "ep %02x couldn't get halt status, %d\n", + ep, retval); + return retval; + } + if (status != 1) { + ERROR(tdev, "ep %02x bogus status: %04x != 1\n", ep, status); + return -EINVAL; + } + retval = simple_io(tdev, urb, 1, 0, -EPIPE, __func__); + if (retval != -EPIPE) + return -EINVAL; + retval = simple_io(tdev, urb, 1, 0, -EPIPE, "verify_still_halted"); + if (retval != -EPIPE) + return -EINVAL; + return 0; +} + +static int test_halt(struct usbtest_dev *tdev, int ep, struct urb *urb) +{ + int retval; + + /* shouldn't look or act halted now */ + retval = verify_not_halted(tdev, 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) { + ERROR(tdev, "ep %02x couldn't set halt, %d\n", ep, retval); + return retval; + } + retval = verify_halted(tdev, ep, urb); + if (retval < 0) { + int ret; + + /* clear halt anyways, else further tests will fail */ + ret = usb_clear_halt(urb->dev, urb->pipe); + if (ret) + ERROR(tdev, "ep %02x couldn't clear halt, %d\n", + ep, ret); + + return retval; + } + + /* clear halt (tests API + protocol), verify it worked */ + retval = usb_clear_halt(urb->dev, urb->pipe); + if (retval < 0) { + ERROR(tdev, "ep %02x couldn't clear halt, %d\n", ep, retval); + return retval; + } + retval = verify_not_halted(tdev, ep, urb); + if (retval < 0) + return retval; + + /* NOTE: could also verify SET_INTERFACE clear halts ... */ + + return 0; +} + +static int test_toggle_sync(struct usbtest_dev *tdev, int ep, struct urb *urb) +{ + int retval; + + /* clear initial data toggle to DATA0 */ + retval = usb_clear_halt(urb->dev, urb->pipe); + if (retval < 0) { + ERROR(tdev, "ep %02x couldn't clear halt, %d\n", ep, retval); + return retval; + } + + /* transfer 3 data packets, should be DATA0, DATA1, DATA0 */ + retval = simple_io(tdev, urb, 1, 0, 0, __func__); + if (retval != 0) + return -EINVAL; + + /* clear halt resets device side data toggle, host should react to it */ + retval = usb_clear_halt(urb->dev, urb->pipe); + if (retval < 0) { + ERROR(tdev, "ep %02x couldn't clear halt, %d\n", ep, retval); + return retval; + } + + /* host should use DATA0 again after clear halt */ + retval = simple_io(tdev, urb, 1, 0, 0, __func__); + + return retval; +} + +static int halt_simple(struct usbtest_dev *dev) +{ + int ep; + int retval = 0; + struct urb *urb; + struct usb_device *udev = testdev_to_usbdev(dev); + + if (udev->speed == USB_SPEED_SUPER) + urb = simple_alloc_urb(udev, 0, 1024, 0); + else + urb = simple_alloc_urb(udev, 0, 512, 0); + 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(dev, 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(dev, ep, urb); + } +done: + simple_free_urb(urb); + return retval; +} + +static int toggle_sync_simple(struct usbtest_dev *dev) +{ + int ep; + int retval = 0; + struct urb *urb; + struct usb_device *udev = testdev_to_usbdev(dev); + unsigned maxp = get_maxpacket(udev, dev->out_pipe); + + /* + * Create a URB that causes a transfer of uneven amount of data packets + * This way the clear toggle has an impact on the data toggle sequence. + * Use 2 maxpacket length packets and one zero packet. + */ + urb = simple_alloc_urb(udev, 0, 2 * maxp, 0); + if (urb == NULL) + return -ENOMEM; + + urb->transfer_flags |= URB_ZERO_PACKET; + + ep = usb_pipeendpoint(dev->out_pipe); + urb->pipe = dev->out_pipe; + retval = test_toggle_sync(dev, ep, urb); + + 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 offset) +{ + 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 + offset, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + buf += offset; + 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] = (u8)(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) { + ERROR(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) { + ERROR(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)) { + ERROR(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 weird case, since its + * status stage is IN, not OUT like other ep0in transfers. + */ + if (len > length) + len = realworld ? 1 : 0; + } + + if (retval < 0) + ERROR(dev, "ctrl_out %s failed, code %d, count %d\n", + what, retval, i); + + kfree(buf - offset); + return retval; +} + +/*-------------------------------------------------------------------------*/ + +/* ISO/BULK tests ... mimics common usage + * - buffer length is split into N packets (mostly maxpacket sized) + * - multi-buffers according to sglen + */ + +struct transfer_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; + bool is_iso; +}; + +static void complicated_callback(struct urb *urb) +{ + struct transfer_context *ctx = urb->context; + unsigned long flags; + + spin_lock_irqsave(&ctx->lock, flags); + 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 += (ctx->is_iso ? urb->number_of_packets : 1); + else if (urb->actual_length != urb->transfer_buffer_length) + ctx->errors++; + else if (check_guard_bytes(ctx->dev, urb) != 0) + ctx->errors++; + + 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_err(&ctx->dev->intf->dev, + "resubmit err %d\n", + status); + fallthrough; + case -ENODEV: /* disconnected */ + case -ESHUTDOWN: /* endpoint disabled */ + ctx->submit_error = 1; + break; + } + } + + ctx->pending--; + if (ctx->pending == 0) { + if (ctx->errors) + dev_err(&ctx->dev->intf->dev, + "during the test, %lu errors out of %lu\n", + ctx->errors, ctx->packet_count); + complete(&ctx->done); + } +done: + spin_unlock_irqrestore(&ctx->lock, flags); +} + +static struct urb *iso_alloc_urb( + struct usb_device *udev, + int pipe, + struct usb_endpoint_descriptor *desc, + long bytes, + unsigned offset +) +{ + struct urb *urb; + unsigned i, maxp, packets; + + if (bytes < 0 || !desc) + return NULL; + + maxp = usb_endpoint_maxp(desc); + if (udev->speed >= USB_SPEED_SUPER) + maxp *= ss_isoc_get_packet_num(udev, pipe); + else + maxp *= usb_endpoint_maxp_mult(desc); + + packets = DIV_ROUND_UP(bytes, maxp); + + urb = usb_alloc_urb(packets, GFP_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_alloc_coherent(udev, bytes + offset, + GFP_KERNEL, + &urb->transfer_dma); + if (!urb->transfer_buffer) { + usb_free_urb(urb); + return NULL; + } + if (offset) { + memset(urb->transfer_buffer, GUARD_BYTE, offset); + urb->transfer_buffer += offset; + urb->transfer_dma += offset; + } + /* For inbound transfers use guard byte so that test fails if + data not correctly copied */ + memset(urb->transfer_buffer, + usb_pipein(urb->pipe) ? GUARD_BYTE : 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 = complicated_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_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param, + int pipe, struct usb_endpoint_descriptor *desc, unsigned offset) +{ + struct transfer_context context; + struct usb_device *udev; + unsigned i; + unsigned long packets = 0; + int status = 0; + struct urb **urbs; + + if (!param->sglen || param->iterations > UINT_MAX / param->sglen) + return -EINVAL; + + if (param->sglen > MAX_SGLEN) + return -EINVAL; + + urbs = kcalloc(param->sglen, sizeof(*urbs), GFP_KERNEL); + if (!urbs) + return -ENOMEM; + + memset(&context, 0, sizeof(context)); + context.count = param->iterations * param->sglen; + context.dev = dev; + context.is_iso = !!desc; + init_completion(&context.done); + spin_lock_init(&context.lock); + + udev = testdev_to_usbdev(dev); + + for (i = 0; i < param->sglen; i++) { + if (context.is_iso) + urbs[i] = iso_alloc_urb(udev, pipe, desc, + param->length, offset); + else + urbs[i] = complicated_alloc_urb(udev, pipe, + param->length, 0); + + if (!urbs[i]) { + status = -ENOMEM; + goto fail; + } + packets += urbs[i]->number_of_packets; + urbs[i]->context = &context; + } + packets *= param->iterations; + + if (context.is_iso) { + int transaction_num; + + if (udev->speed >= USB_SPEED_SUPER) + transaction_num = ss_isoc_get_packet_num(udev, pipe); + else + transaction_num = usb_endpoint_maxp_mult(desc); + + dev_info(&dev->intf->dev, + "iso period %d %sframes, wMaxPacket %d, transactions: %d\n", + 1 << (desc->bInterval - 1), + (udev->speed >= USB_SPEED_HIGH) ? "micro" : "", + usb_endpoint_maxp(desc), + transaction_num); + + dev_info(&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], GFP_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]); + urbs[i] = NULL; + context.pending--; + context.submit_error = 1; + break; + } + } + spin_unlock_irq(&context.lock); + + wait_for_completion(&context.done); + + for (i = 0; i < param->sglen; i++) { + if (urbs[i]) + simple_free_urb(urbs[i]); + } + /* + * 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.is_iso ? context.packet_count / 10 : 0)) + status = -EIO; + + kfree(urbs); + return status; + +fail: + for (i = 0; i < param->sglen; i++) { + if (urbs[i]) + simple_free_urb(urbs[i]); + } + + kfree(urbs); + return status; +} + +static int test_unaligned_bulk( + struct usbtest_dev *tdev, + int pipe, + unsigned length, + int iterations, + unsigned transfer_flags, + const char *label) +{ + int retval; + struct urb *urb = usbtest_alloc_urb(testdev_to_usbdev(tdev), + pipe, length, transfer_flags, 1, 0, simple_callback); + + if (!urb) + return -ENOMEM; + + retval = simple_io(tdev, urb, iterations, 0, 0, label); + simple_free_urb(urb); + return retval; +} + +/* Run tests. */ +static int +usbtest_do_ioctl(struct usb_interface *intf, struct usbtest_param_32 *param) +{ + struct usbtest_dev *dev = usb_get_intfdata(intf); + struct usb_device *udev = testdev_to_usbdev(dev); + struct urb *urb; + struct scatterlist *sg; + struct usb_sg_request req; + unsigned i; + int retval = -EOPNOTSUPP; + + if (param->iterations <= 0) + return -EINVAL; + if (param->sglen > MAX_SGLEN) + return -EINVAL; + /* + * 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. + */ + switch (param->test_num) { + + case 0: + dev_info(&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_info(&intf->dev, + "TEST 1: write %d bytes %u times\n", + param->length, param->iterations); + urb = simple_alloc_urb(udev, dev->out_pipe, param->length, 0); + if (!urb) { + retval = -ENOMEM; + break; + } + /* FIRMWARE: bulk sink (maybe accepts short writes) */ + retval = simple_io(dev, urb, param->iterations, 0, 0, "test1"); + simple_free_urb(urb); + break; + case 2: + if (dev->in_pipe == 0) + break; + dev_info(&intf->dev, + "TEST 2: read %d bytes %u times\n", + param->length, param->iterations); + urb = simple_alloc_urb(udev, dev->in_pipe, param->length, 0); + if (!urb) { + retval = -ENOMEM; + break; + } + /* FIRMWARE: bulk source (maybe generates short writes) */ + retval = simple_io(dev, urb, param->iterations, 0, 0, "test2"); + simple_free_urb(urb); + break; + case 3: + if (dev->out_pipe == 0 || param->vary == 0) + break; + dev_info(&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, 0); + if (!urb) { + retval = -ENOMEM; + break; + } + /* FIRMWARE: bulk sink (maybe accepts short writes) */ + retval = simple_io(dev, urb, param->iterations, param->vary, + 0, "test3"); + simple_free_urb(urb); + break; + case 4: + if (dev->in_pipe == 0 || param->vary == 0) + break; + dev_info(&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, 0); + if (!urb) { + retval = -ENOMEM; + break; + } + /* FIRMWARE: bulk source (maybe generates short writes) */ + retval = simple_io(dev, 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_info(&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, dev, dev->out_pipe); + if (!sg) { + retval = -ENOMEM; + break; + } + /* FIRMWARE: bulk sink (maybe accepts short writes) */ + retval = perform_sglist(dev, 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_info(&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, dev, dev->in_pipe); + if (!sg) { + retval = -ENOMEM; + break; + } + /* FIRMWARE: bulk source (maybe generates short writes) */ + retval = perform_sglist(dev, 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_info(&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, dev, dev->out_pipe); + if (!sg) { + retval = -ENOMEM; + break; + } + /* FIRMWARE: bulk sink (maybe accepts short writes) */ + retval = perform_sglist(dev, 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_info(&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, dev, dev->in_pipe); + if (!sg) { + retval = -ENOMEM; + break; + } + /* FIRMWARE: bulk source (maybe generates short writes) */ + retval = perform_sglist(dev, 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_info(&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) + dev_err(&intf->dev, "ch9 subset failed, " + "iterations left %d\n", i); + break; + + /* queued control messaging */ + case 10: + retval = 0; + dev_info(&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_info(&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_err(&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_info(&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_err(&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_info(&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) + ERROR(dev, "halts failed, iterations left %d\n", i); + break; + + /* control write tests */ + case 14: + if (!dev->info->ctrl_out) + break; + dev_info(&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, 0); + break; + + /* iso write tests */ + case 15: + if (dev->out_iso_pipe == 0 || param->sglen == 0) + break; + dev_info(&intf->dev, + "TEST 15: write %d iso, %d entries of %d bytes\n", + param->iterations, + param->sglen, param->length); + /* FIRMWARE: iso sink */ + retval = test_queue(dev, param, + dev->out_iso_pipe, dev->iso_out, 0); + break; + + /* iso read tests */ + case 16: + if (dev->in_iso_pipe == 0 || param->sglen == 0) + break; + dev_info(&intf->dev, + "TEST 16: read %d iso, %d entries of %d bytes\n", + param->iterations, + param->sglen, param->length); + /* FIRMWARE: iso source */ + retval = test_queue(dev, param, + dev->in_iso_pipe, dev->iso_in, 0); + break; + + /* FIXME scatterlist cancel (needs helper thread) */ + + /* Tests for bulk I/O using DMA mapping by core and odd address */ + case 17: + if (dev->out_pipe == 0) + break; + dev_info(&intf->dev, + "TEST 17: write odd addr %d bytes %u times core map\n", + param->length, param->iterations); + + retval = test_unaligned_bulk( + dev, dev->out_pipe, + param->length, param->iterations, + 0, "test17"); + break; + + case 18: + if (dev->in_pipe == 0) + break; + dev_info(&intf->dev, + "TEST 18: read odd addr %d bytes %u times core map\n", + param->length, param->iterations); + + retval = test_unaligned_bulk( + dev, dev->in_pipe, + param->length, param->iterations, + 0, "test18"); + break; + + /* Tests for bulk I/O using premapped coherent buffer and odd address */ + case 19: + if (dev->out_pipe == 0) + break; + dev_info(&intf->dev, + "TEST 19: write odd addr %d bytes %u times premapped\n", + param->length, param->iterations); + + retval = test_unaligned_bulk( + dev, dev->out_pipe, + param->length, param->iterations, + URB_NO_TRANSFER_DMA_MAP, "test19"); + break; + + case 20: + if (dev->in_pipe == 0) + break; + dev_info(&intf->dev, + "TEST 20: read odd addr %d bytes %u times premapped\n", + param->length, param->iterations); + + retval = test_unaligned_bulk( + dev, dev->in_pipe, + param->length, param->iterations, + URB_NO_TRANSFER_DMA_MAP, "test20"); + break; + + /* control write tests with unaligned buffer */ + case 21: + if (!dev->info->ctrl_out) + break; + dev_info(&intf->dev, + "TEST 21: %d ep0out odd addr, %d..%d vary %d\n", + param->iterations, + realworld ? 1 : 0, param->length, + param->vary); + retval = ctrl_out(dev, param->iterations, + param->length, param->vary, 1); + break; + + /* unaligned iso tests */ + case 22: + if (dev->out_iso_pipe == 0 || param->sglen == 0) + break; + dev_info(&intf->dev, + "TEST 22: write %d iso odd, %d entries of %d bytes\n", + param->iterations, + param->sglen, param->length); + retval = test_queue(dev, param, + dev->out_iso_pipe, dev->iso_out, 1); + break; + + case 23: + if (dev->in_iso_pipe == 0 || param->sglen == 0) + break; + dev_info(&intf->dev, + "TEST 23: read %d iso odd, %d entries of %d bytes\n", + param->iterations, + param->sglen, param->length); + retval = test_queue(dev, param, + dev->in_iso_pipe, dev->iso_in, 1); + break; + + /* unlink URBs from a bulk-OUT queue */ + case 24: + if (dev->out_pipe == 0 || !param->length || param->sglen < 4) + break; + retval = 0; + dev_info(&intf->dev, "TEST 24: unlink from %d queues of " + "%d %d-byte writes\n", + param->iterations, param->sglen, param->length); + for (i = param->iterations; retval == 0 && i > 0; --i) { + retval = unlink_queued(dev, dev->out_pipe, + param->sglen, param->length); + if (retval) { + dev_err(&intf->dev, + "unlink queued writes failed %d, " + "iterations left %d\n", retval, i); + break; + } + } + break; + + /* Simple non-queued interrupt I/O tests */ + case 25: + if (dev->out_int_pipe == 0) + break; + dev_info(&intf->dev, + "TEST 25: write %d bytes %u times\n", + param->length, param->iterations); + urb = simple_alloc_urb(udev, dev->out_int_pipe, param->length, + dev->int_out->bInterval); + if (!urb) { + retval = -ENOMEM; + break; + } + /* FIRMWARE: interrupt sink (maybe accepts short writes) */ + retval = simple_io(dev, urb, param->iterations, 0, 0, "test25"); + simple_free_urb(urb); + break; + case 26: + if (dev->in_int_pipe == 0) + break; + dev_info(&intf->dev, + "TEST 26: read %d bytes %u times\n", + param->length, param->iterations); + urb = simple_alloc_urb(udev, dev->in_int_pipe, param->length, + dev->int_in->bInterval); + if (!urb) { + retval = -ENOMEM; + break; + } + /* FIRMWARE: interrupt source (maybe generates short writes) */ + retval = simple_io(dev, urb, param->iterations, 0, 0, "test26"); + simple_free_urb(urb); + break; + case 27: + /* We do performance test, so ignore data compare */ + if (dev->out_pipe == 0 || param->sglen == 0 || pattern != 0) + break; + dev_info(&intf->dev, + "TEST 27: bulk write %dMbytes\n", (param->iterations * + param->sglen * param->length) / (1024 * 1024)); + retval = test_queue(dev, param, + dev->out_pipe, NULL, 0); + break; + case 28: + if (dev->in_pipe == 0 || param->sglen == 0 || pattern != 0) + break; + dev_info(&intf->dev, + "TEST 28: bulk read %dMbytes\n", (param->iterations * + param->sglen * param->length) / (1024 * 1024)); + retval = test_queue(dev, param, + dev->in_pipe, NULL, 0); + break; + /* Test data Toggle/seq_nr clear between bulk out transfers */ + case 29: + if (dev->out_pipe == 0) + break; + retval = 0; + dev_info(&intf->dev, "TEST 29: Clear toggle between bulk writes %d times\n", + param->iterations); + for (i = param->iterations; retval == 0 && i > 0; --i) + retval = toggle_sync_simple(dev); + + if (retval) + ERROR(dev, "toggle sync failed, iterations left %d\n", + i); + break; + } + return retval; +} + +/*-------------------------------------------------------------------------*/ + +/* 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 + * 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. + * + * WARNING: Because usbfs grabs udev->dev.sem before calling this ioctl(), + * it locks out usbcore in certain code paths. Notably, if you disconnect + * the device-under-test, hub_wq will wait block forever waiting for the + * ioctl to complete ... so that usb_disconnect() can abort the pending + * urbs and then call usbtest_disconnect(). To abort a test, you're best + * off just killing the userspace task and waiting for it to exit. + */ + +static int +usbtest_ioctl(struct usb_interface *intf, unsigned int code, void *buf) +{ + + struct usbtest_dev *dev = usb_get_intfdata(intf); + struct usbtest_param_64 *param_64 = buf; + struct usbtest_param_32 temp; + struct usbtest_param_32 *param_32 = buf; + struct timespec64 start; + struct timespec64 end; + struct timespec64 duration; + int retval = -EOPNOTSUPP; + + /* FIXME USBDEVFS_CONNECTINFO doesn't say how fast the device is. */ + + pattern = mod_pattern; + + if (mutex_lock_interruptible(&dev->lock)) + return -ERESTARTSYS; + + /* FIXME: What if a system sleep starts while a test is running? */ + + /* 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) { + if (intf->altsetting->desc.bInterfaceNumber) { + retval = -ENODEV; + goto free_mutex; + } + retval = set_altsetting(dev, dev->info->alt); + if (retval) { + dev_err(&intf->dev, + "set altsetting to %d failed, %d\n", + dev->info->alt, retval); + goto free_mutex; + } + } + + switch (code) { + case USBTEST_REQUEST_64: + temp.test_num = param_64->test_num; + temp.iterations = param_64->iterations; + temp.length = param_64->length; + temp.sglen = param_64->sglen; + temp.vary = param_64->vary; + param_32 = &temp; + break; + + case USBTEST_REQUEST_32: + break; + + default: + retval = -EOPNOTSUPP; + goto free_mutex; + } + + ktime_get_ts64(&start); + + retval = usbtest_do_ioctl(intf, param_32); + if (retval < 0) + goto free_mutex; + + ktime_get_ts64(&end); + + duration = timespec64_sub(end, start); + + temp.duration_sec = duration.tv_sec; + temp.duration_usec = duration.tv_nsec/NSEC_PER_USEC; + + switch (code) { + case USBTEST_REQUEST_32: + param_32->duration_sec = temp.duration_sec; + param_32->duration_usec = temp.duration_usec; + break; + + case USBTEST_REQUEST_64: + param_64->duration_sec = temp.duration_sec; + param_64->duration_usec = temp.duration_usec; + break; + } + +free_mutex: + mutex_unlock(&dev->lock); + return retval; +} + +/*-------------------------------------------------------------------------*/ + +static unsigned force_interrupt; +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; + char *intrtest, *intwtest; + + 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; + dev_info(&intf->dev, "matched module params, " + "vend=0x%04x prod=0x%04x\n", + le16_to_cpu(udev->descriptor.idVendor), + le16_to_cpu(udev->descriptor.idProduct)); + } +#endif + + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) + return -ENOMEM; + info = (struct usbtest_info *) id->driver_info; + dev->info = info; + mutex_init(&dev->lock); + + dev->intf = intf; + + /* cacheline-aligned scratch for i/o */ + dev->buf = kmalloc(TBUF_SIZE, GFP_KERNEL); + if (dev->buf == 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 = ""; + intrtest = intwtest = ""; + 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 (override_alt >= 0 || info->autoconf) { + int status; + + status = get_endpoints(dev, intf); + if (status < 0) { + WARNING(dev, "couldn't get endpoints, %d\n", + status); + kfree(dev->buf); + kfree(dev); + 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"; + if (dev->in_int_pipe) + intrtest = " int-in"; + if (dev->out_int_pipe) + intwtest = " int-out"; + } + + usb_set_intfdata(intf, dev); + dev_info(&intf->dev, "%s\n", info->name); + dev_info(&intf->dev, "%s {control%s%s%s%s%s%s%s} tests%s\n", + usb_speed_string(udev->speed), + info->ctrl_out ? " in/out" : "", + rtest, wtest, + irtest, iwtest, + intrtest, intwtest, + 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); + + usb_set_intfdata(intf, NULL); + dev_dbg(&intf->dev, "disconnect\n"); + kfree(dev->buf); + 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, + .iso = 1, + .intr = 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 + + +static const struct usb_device_id id_table[] = { + + /*-------------------------------------------------------------*/ + + /* 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, + .unlocked_ioctl = usbtest_ioctl, + .disconnect = usbtest_disconnect, + .suspend = usbtest_suspend, + .resume = usbtest_resume, +}; + +/*-------------------------------------------------------------------------*/ + +static int __init usbtest_init(void) +{ +#ifdef GENERIC + if (vendor) + pr_debug("params: vend=0x%04x prod=0x%04x\n", 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"); + |