#include <linux/usb/composite.h>
#include <linux/usb/functionfs.h>
+#include <linux/aio.h>
+#include <linux/mmu_context.h>
+#include <linux/poll.h>
+
#include "u_fs.h"
#include "configfs.h"
}
+static inline enum ffs_setup_state
+ffs_setup_state_clear_cancelled(struct ffs_data *ffs)
+{
+ return (enum ffs_setup_state)
+ cmpxchg(&ffs->setup_state, FFS_SETUP_CANCELLED, FFS_NO_SETUP);
+}
+
+
static void ffs_func_eps_disable(struct ffs_function *func);
static int __must_check ffs_func_eps_enable(struct ffs_function *func);
struct usb_ep *ep; /* P: ffs->eps_lock */
struct usb_request *req; /* P: epfile->mutex */
- /* [0]: full speed, [1]: high speed */
- struct usb_endpoint_descriptor *descs[2];
+ /* [0]: full speed, [1]: high speed, [2]: super speed */
+ struct usb_endpoint_descriptor *descs[3];
u8 num;
unsigned char _pad;
};
+/* ffs_io_data structure ***************************************************/
+
+struct ffs_io_data {
+ bool aio;
+ bool read;
+
+ struct kiocb *kiocb;
+ const struct iovec *iovec;
+ unsigned long nr_segs;
+ char __user *buf;
+ size_t len;
+
+ struct mm_struct *mm;
+ struct work_struct work;
+
+ struct usb_ep *ep;
+ struct usb_request *req;
+};
+
static int __must_check ffs_epfiles_create(struct ffs_data *ffs);
static void ffs_epfiles_destroy(struct ffs_epfile *epfiles, unsigned count);
DEFINE_MUTEX(ffs_lock);
EXPORT_SYMBOL(ffs_lock);
-static struct ffs_dev *ffs_find_dev(const char *name);
+static struct ffs_dev *_ffs_find_dev(const char *name);
+static struct ffs_dev *_ffs_alloc_dev(void);
static int _ffs_name_dev(struct ffs_dev *dev, const char *name);
+static void _ffs_free_dev(struct ffs_dev *dev);
static void *ffs_acquire_dev(const char *dev_name);
static void ffs_release_dev(struct ffs_data *ffs_data);
static int ffs_ready(struct ffs_data *ffs);
}
ffs->setup_state = FFS_NO_SETUP;
- return ffs->ep0req_status;
+ return req->status ? req->status : req->actual;
}
static int __ffs_ep0_stall(struct ffs_data *ffs)
ENTER();
/* Fast check if setup was canceled */
- if (FFS_SETUP_STATE(ffs) == FFS_SETUP_CANCELED)
+ if (ffs_setup_state_clear_cancelled(ffs) == FFS_SETUP_CANCELLED)
return -EIDRM;
/* Acquire mutex */
* rather then _irqsave
*/
spin_lock_irq(&ffs->ev.waitq.lock);
- switch (FFS_SETUP_STATE(ffs)) {
- case FFS_SETUP_CANCELED:
+ switch (ffs_setup_state_clear_cancelled(ffs)) {
+ case FFS_SETUP_CANCELLED:
ret = -EIDRM;
goto done_spin;
/*
* We are guaranteed to be still in FFS_ACTIVE state
* but the state of setup could have changed from
- * FFS_SETUP_PENDING to FFS_SETUP_CANCELED so we need
+ * FFS_SETUP_PENDING to FFS_SETUP_CANCELLED so we need
* to check for that. If that happened we copied data
* from user space in vain but it's unlikely.
*
* transition can be performed and it's protected by
* mutex.
*/
- if (FFS_SETUP_STATE(ffs) == FFS_SETUP_CANCELED) {
+ if (ffs_setup_state_clear_cancelled(ffs) ==
+ FFS_SETUP_CANCELLED) {
ret = -EIDRM;
done_spin:
spin_unlock_irq(&ffs->ev.waitq.lock);
ENTER();
/* Fast check if setup was canceled */
- if (FFS_SETUP_STATE(ffs) == FFS_SETUP_CANCELED)
+ if (ffs_setup_state_clear_cancelled(ffs) == FFS_SETUP_CANCELLED)
return -EIDRM;
/* Acquire mutex */
*/
spin_lock_irq(&ffs->ev.waitq.lock);
- switch (FFS_SETUP_STATE(ffs)) {
- case FFS_SETUP_CANCELED:
+ switch (ffs_setup_state_clear_cancelled(ffs)) {
+ case FFS_SETUP_CANCELLED:
ret = -EIDRM;
break;
spin_lock_irq(&ffs->ev.waitq.lock);
/* See ffs_ep0_write() */
- if (FFS_SETUP_STATE(ffs) == FFS_SETUP_CANCELED) {
+ if (ffs_setup_state_clear_cancelled(ffs) ==
+ FFS_SETUP_CANCELLED) {
ret = -EIDRM;
break;
}
return ret;
}
+static unsigned int ffs_ep0_poll(struct file *file, poll_table *wait)
+{
+ struct ffs_data *ffs = file->private_data;
+ unsigned int mask = POLLWRNORM;
+ int ret;
+
+ poll_wait(file, &ffs->ev.waitq, wait);
+
+ ret = ffs_mutex_lock(&ffs->mutex, file->f_flags & O_NONBLOCK);
+ if (unlikely(ret < 0))
+ return mask;
+
+ switch (ffs->state) {
+ case FFS_READ_DESCRIPTORS:
+ case FFS_READ_STRINGS:
+ mask |= POLLOUT;
+ break;
+
+ case FFS_ACTIVE:
+ switch (ffs->setup_state) {
+ case FFS_NO_SETUP:
+ if (ffs->ev.count)
+ mask |= POLLIN;
+ break;
+
+ case FFS_SETUP_PENDING:
+ case FFS_SETUP_CANCELLED:
+ mask |= (POLLIN | POLLOUT);
+ break;
+ }
+ case FFS_CLOSING:
+ break;
+ }
+
+ mutex_unlock(&ffs->mutex);
+
+ return mask;
+}
+
static const struct file_operations ffs_ep0_operations = {
.llseek = no_llseek,
.read = ffs_ep0_read,
.release = ffs_ep0_release,
.unlocked_ioctl = ffs_ep0_ioctl,
+ .poll = ffs_ep0_poll,
};
}
}
-static ssize_t ffs_epfile_io(struct file *file,
- char __user *buf, size_t len, int read)
+static void ffs_user_copy_worker(struct work_struct *work)
+{
+ struct ffs_io_data *io_data = container_of(work, struct ffs_io_data,
+ work);
+ int ret = io_data->req->status ? io_data->req->status :
+ io_data->req->actual;
+
+ if (io_data->read && ret > 0) {
+ int i;
+ size_t pos = 0;
+ use_mm(io_data->mm);
+ for (i = 0; i < io_data->nr_segs; i++) {
+ if (unlikely(copy_to_user(io_data->iovec[i].iov_base,
+ &io_data->buf[pos],
+ io_data->iovec[i].iov_len))) {
+ ret = -EFAULT;
+ break;
+ }
+ pos += io_data->iovec[i].iov_len;
+ }
+ unuse_mm(io_data->mm);
+ }
+
+ aio_complete(io_data->kiocb, ret, ret);
+
+ usb_ep_free_request(io_data->ep, io_data->req);
+
+ io_data->kiocb->private = NULL;
+ if (io_data->read)
+ kfree(io_data->iovec);
+ kfree(io_data->buf);
+ kfree(io_data);
+}
+
+static void ffs_epfile_async_io_complete(struct usb_ep *_ep,
+ struct usb_request *req)
+{
+ struct ffs_io_data *io_data = req->context;
+
+ ENTER();
+
+ INIT_WORK(&io_data->work, ffs_user_copy_worker);
+ schedule_work(&io_data->work);
+}
+
+static ssize_t ffs_epfile_io(struct file *file, struct ffs_io_data *io_data)
{
struct ffs_epfile *epfile = file->private_data;
struct ffs_ep *ep;
}
/* Do we halt? */
- halt = !read == !epfile->in;
+ halt = (!io_data->read == !epfile->in);
if (halt && epfile->isoc) {
ret = -EINVAL;
goto error;
* Controller may require buffer size to be aligned to
* maxpacketsize of an out endpoint.
*/
- data_len = read ? usb_ep_align_maybe(gadget, ep->ep, len) : len;
+ data_len = io_data->read ?
+ usb_ep_align_maybe(gadget, ep->ep, io_data->len) :
+ io_data->len;
data = kmalloc(data_len, GFP_KERNEL);
if (unlikely(!data))
return -ENOMEM;
-
- if (!read && unlikely(copy_from_user(data, buf, len))) {
- ret = -EFAULT;
- goto error;
+ if (io_data->aio && !io_data->read) {
+ int i;
+ size_t pos = 0;
+ for (i = 0; i < io_data->nr_segs; i++) {
+ if (unlikely(copy_from_user(&data[pos],
+ io_data->iovec[i].iov_base,
+ io_data->iovec[i].iov_len))) {
+ ret = -EFAULT;
+ goto error;
+ }
+ pos += io_data->iovec[i].iov_len;
+ }
+ } else {
+ if (!io_data->read &&
+ unlikely(__copy_from_user(data, io_data->buf,
+ io_data->len))) {
+ ret = -EFAULT;
+ goto error;
+ }
}
}
ret = -EBADMSG;
} else {
/* Fire the request */
- DECLARE_COMPLETION_ONSTACK(done);
+ struct usb_request *req;
- struct usb_request *req = ep->req;
- req->context = &done;
- req->complete = ffs_epfile_io_complete;
- req->buf = data;
- req->length = data_len;
+ if (io_data->aio) {
+ req = usb_ep_alloc_request(ep->ep, GFP_KERNEL);
+ if (unlikely(!req))
+ goto error;
- ret = usb_ep_queue(ep->ep, req, GFP_ATOMIC);
+ req->buf = data;
+ req->length = io_data->len;
- spin_unlock_irq(&epfile->ffs->eps_lock);
+ io_data->buf = data;
+ io_data->ep = ep->ep;
+ io_data->req = req;
- if (unlikely(ret < 0)) {
- /* nop */
- } else if (unlikely(wait_for_completion_interruptible(&done))) {
- ret = -EINTR;
- usb_ep_dequeue(ep->ep, req);
+ req->context = io_data;
+ req->complete = ffs_epfile_async_io_complete;
+
+ ret = usb_ep_queue(ep->ep, req, GFP_ATOMIC);
+ if (unlikely(ret)) {
+ usb_ep_free_request(ep->ep, req);
+ goto error;
+ }
+ ret = -EIOCBQUEUED;
+
+ spin_unlock_irq(&epfile->ffs->eps_lock);
} else {
- /*
- * XXX We may end up silently droping data here.
- * Since data_len (i.e. req->length) may be bigger
- * than len (after being rounded up to maxpacketsize),
- * we may end up with more data then user space has
- * space for.
- */
- ret = ep->status;
- if (read && ret > 0 &&
- unlikely(copy_to_user(buf, data,
- min_t(size_t, ret, len))))
- ret = -EFAULT;
+ DECLARE_COMPLETION_ONSTACK(done);
+
+ req = ep->req;
+ req->buf = data;
+ req->length = io_data->len;
+
+ req->context = &done;
+ req->complete = ffs_epfile_io_complete;
+
+ ret = usb_ep_queue(ep->ep, req, GFP_ATOMIC);
+
+ spin_unlock_irq(&epfile->ffs->eps_lock);
+
+ if (unlikely(ret < 0)) {
+ /* nop */
+ } else if (unlikely(
+ wait_for_completion_interruptible(&done))) {
+ ret = -EINTR;
+ usb_ep_dequeue(ep->ep, req);
+ } else {
+ /*
+ * XXX We may end up silently droping data
+ * here. Since data_len (i.e. req->length) may
+ * be bigger than len (after being rounded up
+ * to maxpacketsize), we may end up with more
+ * data then user space has space for.
+ */
+ ret = ep->status;
+ if (io_data->read && ret > 0) {
+ ret = min_t(size_t, ret, io_data->len);
+
+ if (unlikely(copy_to_user(io_data->buf,
+ data, ret)))
+ ret = -EFAULT;
+ }
+ }
+ kfree(data);
}
}
mutex_unlock(&epfile->mutex);
+ return ret;
error:
kfree(data);
return ret;
ffs_epfile_write(struct file *file, const char __user *buf, size_t len,
loff_t *ptr)
{
+ struct ffs_io_data io_data;
+
ENTER();
- return ffs_epfile_io(file, (char __user *)buf, len, 0);
+ io_data.aio = false;
+ io_data.read = false;
+ io_data.buf = (char * __user)buf;
+ io_data.len = len;
+
+ return ffs_epfile_io(file, &io_data);
}
static ssize_t
ffs_epfile_read(struct file *file, char __user *buf, size_t len, loff_t *ptr)
{
+ struct ffs_io_data io_data;
+
ENTER();
- return ffs_epfile_io(file, buf, len, 1);
+ io_data.aio = false;
+ io_data.read = true;
+ io_data.buf = buf;
+ io_data.len = len;
+
+ return ffs_epfile_io(file, &io_data);
}
static int
return 0;
}
+static int ffs_aio_cancel(struct kiocb *kiocb)
+{
+ struct ffs_io_data *io_data = kiocb->private;
+ struct ffs_epfile *epfile = kiocb->ki_filp->private_data;
+ int value;
+
+ ENTER();
+
+ spin_lock_irq(&epfile->ffs->eps_lock);
+
+ if (likely(io_data && io_data->ep && io_data->req))
+ value = usb_ep_dequeue(io_data->ep, io_data->req);
+ else
+ value = -EINVAL;
+
+ spin_unlock_irq(&epfile->ffs->eps_lock);
+
+ return value;
+}
+
+static ssize_t ffs_epfile_aio_write(struct kiocb *kiocb,
+ const struct iovec *iovec,
+ unsigned long nr_segs, loff_t loff)
+{
+ struct ffs_io_data *io_data;
+
+ ENTER();
+
+ io_data = kmalloc(sizeof(*io_data), GFP_KERNEL);
+ if (unlikely(!io_data))
+ return -ENOMEM;
+
+ io_data->aio = true;
+ io_data->read = false;
+ io_data->kiocb = kiocb;
+ io_data->iovec = iovec;
+ io_data->nr_segs = nr_segs;
+ io_data->len = kiocb->ki_nbytes;
+ io_data->mm = current->mm;
+
+ kiocb->private = io_data;
+
+ kiocb_set_cancel_fn(kiocb, ffs_aio_cancel);
+
+ return ffs_epfile_io(kiocb->ki_filp, io_data);
+}
+
+static ssize_t ffs_epfile_aio_read(struct kiocb *kiocb,
+ const struct iovec *iovec,
+ unsigned long nr_segs, loff_t loff)
+{
+ struct ffs_io_data *io_data;
+ struct iovec *iovec_copy;
+
+ ENTER();
+
+ iovec_copy = kmalloc_array(nr_segs, sizeof(*iovec_copy), GFP_KERNEL);
+ if (unlikely(!iovec_copy))
+ return -ENOMEM;
+
+ memcpy(iovec_copy, iovec, sizeof(struct iovec)*nr_segs);
+
+ io_data = kmalloc(sizeof(*io_data), GFP_KERNEL);
+ if (unlikely(!io_data)) {
+ kfree(iovec_copy);
+ return -ENOMEM;
+ }
+
+ io_data->aio = true;
+ io_data->read = true;
+ io_data->kiocb = kiocb;
+ io_data->iovec = iovec_copy;
+ io_data->nr_segs = nr_segs;
+ io_data->len = kiocb->ki_nbytes;
+ io_data->mm = current->mm;
+
+ kiocb->private = io_data;
+
+ kiocb_set_cancel_fn(kiocb, ffs_aio_cancel);
+
+ return ffs_epfile_io(kiocb->ki_filp, io_data);
+}
+
static int
ffs_epfile_release(struct inode *inode, struct file *file)
{
.open = ffs_epfile_open,
.write = ffs_epfile_write,
.read = ffs_epfile_read,
+ .aio_write = ffs_epfile_aio_write,
+ .aio_read = ffs_epfile_aio_read,
.release = ffs_epfile_release,
.unlocked_ioctl = ffs_epfile_ioctl,
};
if (ffs->epfiles)
ffs_epfiles_destroy(ffs->epfiles, ffs->eps_count);
- kfree(ffs->raw_descs);
+ kfree(ffs->raw_descs_data);
kfree(ffs->raw_strings);
kfree(ffs->stringtabs);
}
ffs_data_clear(ffs);
ffs->epfiles = NULL;
+ ffs->raw_descs_data = NULL;
ffs->raw_descs = NULL;
ffs->raw_strings = NULL;
ffs->stringtabs = NULL;
ffs->raw_descs_length = 0;
- ffs->raw_fs_descs_length = 0;
ffs->fs_descs_count = 0;
ffs->hs_descs_count = 0;
+ ffs->ss_descs_count = 0;
ffs->strings_count = 0;
ffs->interfaces_count = 0;
spin_lock_irqsave(&func->ffs->eps_lock, flags);
do {
struct usb_endpoint_descriptor *ds;
- ds = ep->descs[ep->descs[1] ? 1 : 0];
+ int desc_idx;
+
+ if (ffs->gadget->speed == USB_SPEED_SUPER)
+ desc_idx = 2;
+ else if (ffs->gadget->speed == USB_SPEED_HIGH)
+ desc_idx = 1;
+ else
+ desc_idx = 0;
+
+ /* fall-back to lower speed if desc missing for current speed */
+ do {
+ ds = ep->descs[desc_idx];
+ } while (!ds && --desc_idx >= 0);
+
+ if (!ds) {
+ ret = -EINVAL;
+ break;
+ }
ep->ep->driver_data = ep;
ep->ep->desc = ds;
}
break;
+ case USB_DT_SS_ENDPOINT_COMP:
+ pr_vdebug("EP SS companion descriptor\n");
+ if (length != sizeof(struct usb_ss_ep_comp_descriptor))
+ goto inv_length;
+ break;
+
case USB_DT_OTHER_SPEED_CONFIG:
case USB_DT_INTERFACE_POWER:
case USB_DT_DEBUG:
static int __ffs_data_got_descs(struct ffs_data *ffs,
char *const _data, size_t len)
{
- unsigned fs_count, hs_count;
- int fs_len, ret = -EINVAL;
- char *data = _data;
+ char *data = _data, *raw_descs;
+ unsigned counts[3], flags;
+ int ret = -EINVAL, i;
ENTER();
- if (unlikely(get_unaligned_le32(data) != FUNCTIONFS_DESCRIPTORS_MAGIC ||
- get_unaligned_le32(data + 4) != len))
+ if (get_unaligned_le32(data + 4) != len)
goto error;
- fs_count = get_unaligned_le32(data + 8);
- hs_count = get_unaligned_le32(data + 12);
-
- if (!fs_count && !hs_count)
- goto einval;
- data += 16;
- len -= 16;
-
- if (likely(fs_count)) {
- fs_len = ffs_do_descs(fs_count, data, len,
- __ffs_data_do_entity, ffs);
- if (unlikely(fs_len < 0)) {
- ret = fs_len;
+ switch (get_unaligned_le32(data)) {
+ case FUNCTIONFS_DESCRIPTORS_MAGIC:
+ flags = FUNCTIONFS_HAS_FS_DESC | FUNCTIONFS_HAS_HS_DESC;
+ data += 8;
+ len -= 8;
+ break;
+ case FUNCTIONFS_DESCRIPTORS_MAGIC_V2:
+ flags = get_unaligned_le32(data + 8);
+ if (flags & ~(FUNCTIONFS_HAS_FS_DESC |
+ FUNCTIONFS_HAS_HS_DESC |
+ FUNCTIONFS_HAS_SS_DESC)) {
+ ret = -ENOSYS;
goto error;
}
+ data += 12;
+ len -= 12;
+ break;
+ default:
+ goto error;
+ }
- data += fs_len;
- len -= fs_len;
- } else {
- fs_len = 0;
+ /* Read fs_count, hs_count and ss_count (if present) */
+ for (i = 0; i < 3; ++i) {
+ if (!(flags & (1 << i))) {
+ counts[i] = 0;
+ } else if (len < 4) {
+ goto error;
+ } else {
+ counts[i] = get_unaligned_le32(data);
+ data += 4;
+ len -= 4;
+ }
}
- if (likely(hs_count)) {
- ret = ffs_do_descs(hs_count, data, len,
+ /* Read descriptors */
+ raw_descs = data;
+ for (i = 0; i < 3; ++i) {
+ if (!counts[i])
+ continue;
+ ret = ffs_do_descs(counts[i], data, len,
__ffs_data_do_entity, ffs);
- if (unlikely(ret < 0))
+ if (ret < 0)
goto error;
- } else {
- ret = 0;
+ data += ret;
+ len -= ret;
}
- if (unlikely(len != ret))
- goto einval;
+ if (raw_descs == data || len) {
+ ret = -EINVAL;
+ goto error;
+ }
- ffs->raw_fs_descs_length = fs_len;
- ffs->raw_descs_length = fs_len + ret;
- ffs->raw_descs = _data;
- ffs->fs_descs_count = fs_count;
- ffs->hs_descs_count = hs_count;
+ ffs->raw_descs_data = _data;
+ ffs->raw_descs = raw_descs;
+ ffs->raw_descs_length = data - raw_descs;
+ ffs->fs_descs_count = counts[0];
+ ffs->hs_descs_count = counts[1];
+ ffs->ss_descs_count = counts[2];
return 0;
-einval:
- ret = -EINVAL;
error:
kfree(_data);
return ret;
* the source does nothing.
*/
if (ffs->setup_state == FFS_SETUP_PENDING)
- ffs->setup_state = FFS_SETUP_CANCELED;
+ ffs->setup_state = FFS_SETUP_CANCELLED;
switch (type) {
case FUNCTIONFS_RESUME:
struct usb_endpoint_descriptor *ds = (void *)desc;
struct ffs_function *func = priv;
struct ffs_ep *ffs_ep;
-
- /*
- * If hs_descriptors is not NULL then we are reading hs
- * descriptors now
- */
- const int isHS = func->function.hs_descriptors != NULL;
- unsigned idx;
+ unsigned ep_desc_id, idx;
+ static const char *speed_names[] = { "full", "high", "super" };
if (type != FFS_DESCRIPTOR)
return 0;
- if (isHS)
+ /*
+ * If ss_descriptors is not NULL, we are reading super speed
+ * descriptors; if hs_descriptors is not NULL, we are reading high
+ * speed descriptors; otherwise, we are reading full speed
+ * descriptors.
+ */
+ if (func->function.ss_descriptors) {
+ ep_desc_id = 2;
+ func->function.ss_descriptors[(long)valuep] = desc;
+ } else if (func->function.hs_descriptors) {
+ ep_desc_id = 1;
func->function.hs_descriptors[(long)valuep] = desc;
- else
+ } else {
+ ep_desc_id = 0;
func->function.fs_descriptors[(long)valuep] = desc;
+ }
if (!desc || desc->bDescriptorType != USB_DT_ENDPOINT)
return 0;
idx = (ds->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK) - 1;
ffs_ep = func->eps + idx;
- if (unlikely(ffs_ep->descs[isHS])) {
- pr_vdebug("two %sspeed descriptors for EP %d\n",
- isHS ? "high" : "full",
+ if (unlikely(ffs_ep->descs[ep_desc_id])) {
+ pr_err("two %sspeed descriptors for EP %d\n",
+ speed_names[ep_desc_id],
ds->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
return -EINVAL;
}
- ffs_ep->descs[isHS] = ds;
+ ffs_ep->descs[ep_desc_id] = ds;
ffs_dump_mem(": Original ep desc", ds, ds->bLength);
if (ffs_ep->ep) {
const int full = !!func->ffs->fs_descs_count;
const int high = gadget_is_dualspeed(func->gadget) &&
func->ffs->hs_descs_count;
+ const int super = gadget_is_superspeed(func->gadget) &&
+ func->ffs->ss_descs_count;
- int ret;
+ int fs_len, hs_len, ret;
/* Make it a single chunk, less management later on */
vla_group(d);
full ? ffs->fs_descs_count + 1 : 0);
vla_item_with_sz(d, struct usb_descriptor_header *, hs_descs,
high ? ffs->hs_descs_count + 1 : 0);
+ vla_item_with_sz(d, struct usb_descriptor_header *, ss_descs,
+ super ? ffs->ss_descs_count + 1 : 0);
vla_item_with_sz(d, short, inums, ffs->interfaces_count);
- vla_item_with_sz(d, char, raw_descs,
- high ? ffs->raw_descs_length : ffs->raw_fs_descs_length);
+ vla_item_with_sz(d, char, raw_descs, ffs->raw_descs_length);
char *vlabuf;
ENTER();
- /* Only high speed but not supported by gadget? */
- if (unlikely(!(full | high)))
+ /* Has descriptors only for speeds gadget does not support */
+ if (unlikely(!(full | high | super)))
return -ENOTSUPP;
/* Allocate a single chunk, less management later on */
/* Zero */
memset(vla_ptr(vlabuf, d, eps), 0, d_eps__sz);
- memcpy(vla_ptr(vlabuf, d, raw_descs), ffs->raw_descs + 16,
- d_raw_descs__sz);
+ /* Copy descriptors */
+ memcpy(vla_ptr(vlabuf, d, raw_descs), ffs->raw_descs,
+ ffs->raw_descs_length);
+
memset(vla_ptr(vlabuf, d, inums), 0xff, d_inums__sz);
for (ret = ffs->eps_count; ret; --ret) {
struct ffs_ep *ptr;
*/
if (likely(full)) {
func->function.fs_descriptors = vla_ptr(vlabuf, d, fs_descs);
- ret = ffs_do_descs(ffs->fs_descs_count,
- vla_ptr(vlabuf, d, raw_descs),
- d_raw_descs__sz,
- __ffs_func_bind_do_descs, func);
- if (unlikely(ret < 0))
+ fs_len = ffs_do_descs(ffs->fs_descs_count,
+ vla_ptr(vlabuf, d, raw_descs),
+ d_raw_descs__sz,
+ __ffs_func_bind_do_descs, func);
+ if (unlikely(fs_len < 0)) {
+ ret = fs_len;
goto error;
+ }
} else {
- ret = 0;
+ fs_len = 0;
}
if (likely(high)) {
func->function.hs_descriptors = vla_ptr(vlabuf, d, hs_descs);
- ret = ffs_do_descs(ffs->hs_descs_count,
- vla_ptr(vlabuf, d, raw_descs) + ret,
- d_raw_descs__sz - ret,
- __ffs_func_bind_do_descs, func);
+ hs_len = ffs_do_descs(ffs->hs_descs_count,
+ vla_ptr(vlabuf, d, raw_descs) + fs_len,
+ d_raw_descs__sz - fs_len,
+ __ffs_func_bind_do_descs, func);
+ if (unlikely(hs_len < 0)) {
+ ret = hs_len;
+ goto error;
+ }
+ } else {
+ hs_len = 0;
+ }
+
+ if (likely(super)) {
+ func->function.ss_descriptors = vla_ptr(vlabuf, d, ss_descs);
+ ret = ffs_do_descs(ffs->ss_descs_count,
+ vla_ptr(vlabuf, d, raw_descs) + fs_len + hs_len,
+ d_raw_descs__sz - fs_len - hs_len,
+ __ffs_func_bind_do_descs, func);
if (unlikely(ret < 0))
goto error;
}
* now.
*/
ret = ffs_do_descs(ffs->fs_descs_count +
- (high ? ffs->hs_descs_count : 0),
+ (high ? ffs->hs_descs_count : 0) +
+ (super ? ffs->ss_descs_count : 0),
vla_ptr(vlabuf, d, raw_descs), d_raw_descs__sz,
__ffs_func_bind_do_nums, func);
if (unlikely(ret < 0))
static LIST_HEAD(ffs_devices);
-static struct ffs_dev *_ffs_find_dev(const char *name)
+static struct ffs_dev *_ffs_do_find_dev(const char *name)
{
struct ffs_dev *dev;
/*
* ffs_lock must be taken by the caller of this function
*/
-static struct ffs_dev *ffs_get_single_dev(void)
+static struct ffs_dev *_ffs_get_single_dev(void)
{
struct ffs_dev *dev;
/*
* ffs_lock must be taken by the caller of this function
*/
-static struct ffs_dev *ffs_find_dev(const char *name)
+static struct ffs_dev *_ffs_find_dev(const char *name)
{
struct ffs_dev *dev;
- dev = ffs_get_single_dev();
+ dev = _ffs_get_single_dev();
if (dev)
return dev;
- return _ffs_find_dev(name);
+ return _ffs_do_find_dev(name);
}
/* Configfs support *********************************************************/
opts = to_f_fs_opts(f);
ffs_dev_lock();
- ffs_free_dev(opts->dev);
+ _ffs_free_dev(opts->dev);
ffs_dev_unlock();
kfree(opts);
}
opts->func_inst.set_inst_name = ffs_set_inst_name;
opts->func_inst.free_func_inst = ffs_free_inst;
ffs_dev_lock();
- dev = ffs_alloc_dev();
+ dev = _ffs_alloc_dev();
ffs_dev_unlock();
if (IS_ERR(dev)) {
kfree(opts);
*/
func->function.fs_descriptors = NULL;
func->function.hs_descriptors = NULL;
+ func->function.ss_descriptors = NULL;
func->interfaces_nums = NULL;
ffs_event_add(ffs, FUNCTIONFS_UNBIND);
/*
* ffs_lock must be taken by the caller of this function
*/
-struct ffs_dev *ffs_alloc_dev(void)
+static struct ffs_dev *_ffs_alloc_dev(void)
{
struct ffs_dev *dev;
int ret;
- if (ffs_get_single_dev())
+ if (_ffs_get_single_dev())
return ERR_PTR(-EBUSY);
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
{
struct ffs_dev *existing;
- existing = _ffs_find_dev(name);
+ existing = _ffs_do_find_dev(name);
if (existing)
return -EBUSY;
-
+
dev->name = name;
return 0;
/*
* ffs_lock must be taken by the caller of this function
*/
-void ffs_free_dev(struct ffs_dev *dev)
+static void _ffs_free_dev(struct ffs_dev *dev)
{
list_del(&dev->entry);
if (dev->name_allocated)
ENTER();
ffs_dev_lock();
- ffs_dev = ffs_find_dev(dev_name);
+ ffs_dev = _ffs_find_dev(dev_name);
if (!ffs_dev)
ffs_dev = ERR_PTR(-ENODEV);
else if (ffs_dev->mounted)
ffs_dev_lock();
ffs_dev = ffs_data->private_data;
- if (ffs_dev)
+ if (ffs_dev) {
ffs_dev->mounted = false;
-
- if (ffs_dev->ffs_release_dev_callback)
- ffs_dev->ffs_release_dev_callback(ffs_dev);
+
+ if (ffs_dev->ffs_release_dev_callback)
+ ffs_dev->ffs_release_dev_callback(ffs_dev);
+ }
ffs_dev_unlock();
}
projects / linux-2.6-microblaze.git / blobdiff