Most of the data from fsg_dev have been moved to fsg_common
structure. The fsg_dev structure holds only endpoint dependent
data. The fsg_common structure has a fsg pointer which points
to active fsg_dev structure -- endpoints are referenced via this
pointer.
This fixes the problem of several threads created when a single
instance of MSF is used in several USB configurations.
Signed-off-by: Michal Nazarewicz <m.nazarewicz@xxxxxxxxxxx>
---
drivers/usb/gadget/f_mass_storage.c | 1230 ++++++++++++++++---------------
1 files changed, 648 insertions(+), 582 deletions(-)
diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
index de29a6b..4cf1232 100644
--- a/drivers/usb/gadget/f_mass_storage.c
+++ b/drivers/usb/gadget/f_mass_storage.c
@@ -312,14 +312,26 @@ static const char fsg_string_interface[] = "Mass Storage";
/*-------------------------------------------------------------------------*/
+struct fsg_dev;
+
/* Data shared by all the FSG instances. */
struct fsg_common {
struct usb_gadget *gadget;
+ struct fsg_dev *fsg;
+ struct fsg_dev *prev_fsg;
/* filesem protects: backing files in use */
struct rw_semaphore filesem;
+ /* lock protects: state, all the req_busy's */
+ spinlock_t lock;
+
+ struct usb_ep *ep0; /* Copy of gadget->ep0 */
+ struct usb_request *ep0req; /* Copy of cdev->req */
+ unsigned int ep0_req_tag;
+ const char *ep0req_name;
+
struct fsg_buffhd *next_buffhd_to_fill;
struct fsg_buffhd *next_buffhd_to_drain;
struct fsg_buffhd buffhds[FSG_NUM_BUFFERS];
@@ -332,10 +344,28 @@ struct fsg_common {
struct fsg_lun *luns;
struct fsg_lun *curlun;
+ unsigned int bulk_out_maxpacket;
+ enum fsg_state state; /* For exception handling */
+ unsigned int exception_req_tag;
+
+ u8 config, new_config;
+ enum data_direction data_dir;
+ u32 data_size;
+ u32 data_size_from_cmnd;
+ u32 tag;
+ u32 residue;
+ u32 usb_amount_left;
+
unsigned int can_stall:1;
unsigned int free_storage_on_release:1;
+ unsigned int phase_error:1;
+ unsigned int short_packet_received:1;
+ unsigned int bad_lun_okay:1;
+ unsigned int running:1;
- const char *thread_name;
+ int thread_wakeup_needed;
+ struct completion thread_notifier;
+ struct task_struct *thread_task;
/* Vendor (8 chars), product (16 chars), release (4
* hexadecimal digits) and NUL byte */
@@ -367,54 +397,34 @@ struct fsg_config {
struct fsg_dev {
struct usb_function function;
- struct usb_composite_dev *cdev;
struct usb_gadget *gadget; /* Copy of cdev->gadget */
struct fsg_common *common;
u16 interface_number;
- /* lock protects: state, all the req_busy's */
- spinlock_t lock;
-
- struct usb_ep *ep0; /* Copy of gadget->ep0 */
- struct usb_request *ep0req; /* Copy of cdev->req */
- unsigned int ep0_req_tag;
- const char *ep0req_name;
-
- unsigned int bulk_out_maxpacket;
- enum fsg_state state; /* For exception handling */
- unsigned int exception_req_tag;
-
- u8 config, new_config;
-
- unsigned int running:1;
unsigned int bulk_in_enabled:1;
unsigned int bulk_out_enabled:1;
- unsigned int phase_error:1;
- unsigned int short_packet_received:1;
- unsigned int bad_lun_okay:1;
- unsigned int can_stall:1;
unsigned long atomic_bitflags;
-#define REGISTERED 0
-#define IGNORE_BULK_OUT 1
+#define IGNORE_BULK_OUT 0
struct usb_ep *bulk_in;
struct usb_ep *bulk_out;
-
- int thread_wakeup_needed;
- struct completion thread_notifier;
- struct task_struct *thread_task;
-
- enum data_direction data_dir;
- u32 data_size;
- u32 data_size_from_cmnd;
- u32 tag;
- u32 residue;
- u32 usb_amount_left;
};
+static inline int __fsg_is_set(struct fsg_common *common,
+ const char *func, unsigned line)
+{
+ if (common->fsg)
+ return 1;
+ ERROR(common, "common->fsg is NULL in %s at %u\n", func, line);
+ return 0;
+}
+
+#define fsg_is_set(common) likely(__fsg_is_set(common, __func__, __LINE__))
+
+
static inline struct fsg_dev *fsg_from_func(struct usb_function *f)
{
return container_of(f, struct fsg_dev, function);
@@ -423,21 +433,21 @@ static inline struct fsg_dev *fsg_from_func(struct usb_function *f)
typedef void (*fsg_routine_t)(struct fsg_dev *);
-static int exception_in_progress(struct fsg_dev *fsg)
+static int exception_in_progress(struct fsg_common *common)
{
- return (fsg->state > FSG_STATE_IDLE);
+ return common->state > FSG_STATE_IDLE;
}
/* Make bulk-out requests be divisible by the maxpacket size */
-static void set_bulk_out_req_length(struct fsg_dev *fsg,
+static void set_bulk_out_req_length(struct fsg_common *common,
struct fsg_buffhd *bh, unsigned int length)
{
unsigned int rem;
bh->bulk_out_intended_length = length;
- rem = length % fsg->bulk_out_maxpacket;
+ rem = length % common->bulk_out_maxpacket;
if (rem > 0)
- length += fsg->bulk_out_maxpacket - rem;
+ length += common->bulk_out_maxpacket - rem;
bh->outreq->length = length;
}
@@ -463,47 +473,46 @@ static int fsg_set_halt(struct fsg_dev *fsg, struct usb_ep *ep)
/* These routines may be called in process context or in_irq */
/* Caller must hold fsg->lock */
-static void wakeup_thread(struct fsg_dev *fsg)
+static void wakeup_thread(struct fsg_common *common)
{
/* Tell the main thread that something has happened */
- fsg->thread_wakeup_needed = 1;
- if (fsg->thread_task)
- wake_up_process(fsg->thread_task);
+ common->thread_wakeup_needed = 1;
+ if (common->thread_task)
+ wake_up_process(common->thread_task);
}
-static void raise_exception(struct fsg_dev *fsg, enum fsg_state new_state)
+static void raise_exception(struct fsg_common *common, enum fsg_state new_state)
{
unsigned long flags;
/* Do nothing if a higher-priority exception is already in progress.
* If a lower-or-equal priority exception is in progress, preempt it
* and notify the main thread by sending it a signal. */
- spin_lock_irqsave(&fsg->lock, flags);
- if (fsg->state <= new_state) {
- fsg->exception_req_tag = fsg->ep0_req_tag;
- fsg->state = new_state;
- if (fsg->thread_task)
+ spin_lock_irqsave(&common->lock, flags);
+ if (common->state <= new_state) {
+ common->exception_req_tag = common->ep0_req_tag;
+ common->state = new_state;
+ if (common->thread_task)
send_sig_info(SIGUSR1, SEND_SIG_FORCED,
- fsg->thread_task);
+ common->thread_task);
}
- spin_unlock_irqrestore(&fsg->lock, flags);
+ spin_unlock_irqrestore(&common->lock, flags);
}
/*-------------------------------------------------------------------------*/
-static int ep0_queue(struct fsg_dev *fsg)
+static int ep0_queue(struct fsg_common *common)
{
int rc;
- rc = usb_ep_queue(fsg->ep0, fsg->ep0req, GFP_ATOMIC);
- fsg->ep0->driver_data = fsg;
+ rc = usb_ep_queue(common->ep0, common->ep0req, GFP_ATOMIC);
+ common->ep0->driver_data = common;
if (rc != 0 && rc != -ESHUTDOWN) {
-
/* We can't do much more than wait for a reset */
- WARNING(fsg, "error in submission: %s --> %d\n",
- fsg->ep0->name, rc);
+ WARNING(common, "error in submission: %s --> %d\n",
+ common->ep0->name, rc);
}
return rc;
}
@@ -515,32 +524,32 @@ static int ep0_queue(struct fsg_dev *fsg)
static void bulk_in_complete(struct usb_ep *ep, struct usb_request *req)
{
- struct fsg_dev *fsg = ep->driver_data;
+ struct fsg_common *common = ep->driver_data;
struct fsg_buffhd *bh = req->context;
if (req->status || req->actual != req->length)
- DBG(fsg, "%s --> %d, %u/%u\n", __func__,
+ DBG(common, "%s --> %d, %u/%u\n", __func__,
req->status, req->actual, req->length);
if (req->status == -ECONNRESET) /* Request was cancelled */
usb_ep_fifo_flush(ep);
/* Hold the lock while we update the request and buffer states */
smp_wmb();
- spin_lock(&fsg->lock);
+ spin_lock(&common->lock);
bh->inreq_busy = 0;
bh->state = BUF_STATE_EMPTY;
- wakeup_thread(fsg);
- spin_unlock(&fsg->lock);
+ wakeup_thread(common);
+ spin_unlock(&common->lock);
}
static void bulk_out_complete(struct usb_ep *ep, struct usb_request *req)
{
- struct fsg_dev *fsg = ep->driver_data;
+ struct fsg_common *common = ep->driver_data;
struct fsg_buffhd *bh = req->context;
- dump_msg(fsg, "bulk-out", req->buf, req->actual);
+ dump_msg(common, "bulk-out", req->buf, req->actual);
if (req->status || req->actual != bh->bulk_out_intended_length)
- DBG(fsg, "%s --> %d, %u/%u\n", __func__,
+ DBG(common, "%s --> %d, %u/%u\n", __func__,
req->status, req->actual,
bh->bulk_out_intended_length);
if (req->status == -ECONNRESET) /* Request was cancelled */
@@ -548,11 +557,11 @@ static void bulk_out_complete(struct usb_ep *ep, struct usb_request *req)
/* Hold the lock while we update the request and buffer states */
smp_wmb();
- spin_lock(&fsg->lock);
+ spin_lock(&common->lock);
bh->outreq_busy = 0;
bh->state = BUF_STATE_FULL;
- wakeup_thread(fsg);
- spin_unlock(&fsg->lock);
+ wakeup_thread(common);
+ spin_unlock(&common->lock);
}
@@ -564,12 +573,12 @@ static int fsg_setup(struct usb_function *f,
const struct usb_ctrlrequest *ctrl)
{
struct fsg_dev *fsg = fsg_from_func(f);
- struct usb_request *req = fsg->ep0req;
+ struct usb_request *req = fsg->common->ep0req;
u16 w_index = le16_to_cpu(ctrl->wIndex);
u16 w_value = le16_to_cpu(ctrl->wValue);
u16 w_length = le16_to_cpu(ctrl->wLength);
- if (!fsg->config)
+ if (!fsg->common->config)
return -EOPNOTSUPP;
switch (ctrl->bRequest) {
@@ -584,7 +593,7 @@ static int fsg_setup(struct usb_function *f,
/* Raise an exception to stop the current operation
* and reinitialize our state. */
DBG(fsg, "bulk reset request\n");
- raise_exception(fsg, FSG_STATE_RESET);
+ raise_exception(fsg->common, FSG_STATE_RESET);
return DELAYED_STATUS;
case USB_BULK_GET_MAX_LUN_REQUEST:
@@ -622,10 +631,10 @@ static void start_transfer(struct fsg_dev *fsg, struct usb_ep *ep,
if (ep == fsg->bulk_in)
dump_msg(fsg, "bulk-in", req->buf, req->length);
- spin_lock_irq(&fsg->lock);
+ spin_lock_irq(&fsg->common->lock);
*pbusy = 1;
*state = BUF_STATE_BUSY;
- spin_unlock_irq(&fsg->lock);
+ spin_unlock_irq(&fsg->common->lock);
rc = usb_ep_queue(ep, req, GFP_KERNEL);
if (rc != 0) {
*pbusy = 0;
@@ -642,8 +651,18 @@ static void start_transfer(struct fsg_dev *fsg, struct usb_ep *ep,
}
}
+#define START_TRANSFER_OR(common, ep_name, req, pbusy, state) \
+ if (fsg_is_set(common)) \
+ start_transfer((common)->fsg, (common)->fsg->ep_name, \
+ req, pbusy, state); \
+ else
-static int sleep_thread(struct fsg_dev *fsg)
+#define START_TRANSFER(common, ep_name, req, pbusy, state) \
+ START_TRANSFER_OR(common, ep_name, req, pbusy, state) (void)0
+
+
+
+static int sleep_thread(struct fsg_common *common)
{
int rc = 0;
@@ -655,21 +674,21 @@ static int sleep_thread(struct fsg_dev *fsg)
rc = -EINTR;
break;
}
- if (fsg->thread_wakeup_needed)
+ if (common->thread_wakeup_needed)
break;
schedule();
}
__set_current_state(TASK_RUNNING);
- fsg->thread_wakeup_needed = 0;
+ common->thread_wakeup_needed = 0;
return rc;
}
/*-------------------------------------------------------------------------*/
-static int do_read(struct fsg_dev *fsg)
+static int do_read(struct fsg_common *common)
{
- struct fsg_lun *curlun = fsg->common->curlun;
+ struct fsg_lun *curlun = common->curlun;
u32 lba;
struct fsg_buffhd *bh;
int rc;
@@ -681,15 +700,15 @@ static int do_read(struct fsg_dev *fsg)
/* Get the starting Logical Block Address and check that it's
* not too big */
- if (fsg->common->cmnd[0] == SC_READ_6)
- lba = get_unaligned_be24(&fsg->common->cmnd[1]);
+ if (common->cmnd[0] == SC_READ_6)
+ lba = get_unaligned_be24(&common->cmnd[1]);
else {
- lba = get_unaligned_be32(&fsg->common->cmnd[2]);
+ lba = get_unaligned_be32(&common->cmnd[2]);
/* We allow DPO (Disable Page Out = don't save data in the
* cache) and FUA (Force Unit Access = don't read from the
* cache), but we don't implement them. */
- if ((fsg->common->cmnd[1] & ~0x18) != 0) {
+ if ((common->cmnd[1] & ~0x18) != 0) {
curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
return -EINVAL;
}
@@ -701,7 +720,7 @@ static int do_read(struct fsg_dev *fsg)
file_offset = ((loff_t) lba) << 9;
/* Carry out the file reads */
- amount_left = fsg->data_size_from_cmnd;
+ amount_left = common->data_size_from_cmnd;
if (unlikely(amount_left == 0))
return -EIO; /* No default reply */
@@ -724,9 +743,9 @@ static int do_read(struct fsg_dev *fsg)
partial_page);
/* Wait for the next buffer to become available */
- bh = fsg->common->next_buffhd_to_fill;
+ bh = common->next_buffhd_to_fill;
while (bh->state != BUF_STATE_EMPTY) {
- rc = sleep_thread(fsg);
+ rc = sleep_thread(common);
if (rc)
return rc;
}
@@ -765,7 +784,7 @@ static int do_read(struct fsg_dev *fsg)
}
file_offset += nread;
amount_left -= nread;
- fsg->residue -= nread;
+ common->residue -= nread;
bh->inreq->length = nread;
bh->state = BUF_STATE_FULL;
@@ -782,9 +801,12 @@ static int do_read(struct fsg_dev *fsg)
/* Send this buffer and go read some more */
bh->inreq->zero = 0;
- start_transfer(fsg, fsg->bulk_in, bh->inreq,
- &bh->inreq_busy, &bh->state);
- fsg->common->next_buffhd_to_fill = bh->next;
+ START_TRANSFER_OR(common, bulk_in, bh->inreq,
+ &bh->inreq_busy, &bh->state)
+ /* Don't know what to do if
+ * common->fsg is NULL */
+ return -EIO;
+ common->next_buffhd_to_fill = bh->next;
}
return -EIO; /* No default reply */
@@ -793,9 +815,9 @@ static int do_read(struct fsg_dev *fsg)
/*-------------------------------------------------------------------------*/
-static int do_write(struct fsg_dev *fsg)
+static int do_write(struct fsg_common *common)
{
- struct fsg_lun *curlun = fsg->common->curlun;
+ struct fsg_lun *curlun = common->curlun;
u32 lba;
struct fsg_buffhd *bh;
int get_some_more;
@@ -816,20 +838,20 @@ static int do_write(struct fsg_dev *fsg)
/* Get the starting Logical Block Address and check that it's
* not too big */
- if (fsg->common->cmnd[0] == SC_WRITE_6)
- lba = get_unaligned_be24(&fsg->common->cmnd[1]);
+ if (common->cmnd[0] == SC_WRITE_6)
+ lba = get_unaligned_be24(&common->cmnd[1]);
else {
- lba = get_unaligned_be32(&fsg->common->cmnd[2]);
+ lba = get_unaligned_be32(&common->cmnd[2]);
/* We allow DPO (Disable Page Out = don't save data in the
* cache) and FUA (Force Unit Access = write directly to the
* medium). We don't implement DPO; we implement FUA by
* performing synchronous output. */
- if ((fsg->common->cmnd[1] & ~0x18) != 0) {
+ if (common->cmnd[1] & ~0x18) {
curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
return -EINVAL;
}
- if (fsg->common->cmnd[1] & 0x08) { /* FUA */
+ if (common->cmnd[1] & 0x08) { /* FUA */
spin_lock(&curlun->filp->f_lock);
curlun->filp->f_flags |= O_SYNC;
spin_unlock(&curlun->filp->f_lock);
@@ -843,12 +865,13 @@ static int do_write(struct fsg_dev *fsg)
/* Carry out the file writes */
get_some_more = 1;
file_offset = usb_offset = ((loff_t) lba) << 9;
- amount_left_to_req = amount_left_to_write = fsg->data_size_from_cmnd;
+ amount_left_to_req = common->data_size_from_cmnd;
+ amount_left_to_write = common->data_size_from_cmnd;
while (amount_left_to_write > 0) {
/* Queue a request for more data from the host */
- bh = fsg->common->next_buffhd_to_fill;
+ bh = common->next_buffhd_to_fill;
if (bh->state == BUF_STATE_EMPTY && get_some_more) {
/* Figure out how much we want to get:
@@ -887,7 +910,7 @@ static int do_write(struct fsg_dev *fsg)
/* Get the next buffer */
usb_offset += amount;
- fsg->usb_amount_left -= amount;
+ common->usb_amount_left -= amount;
amount_left_to_req -= amount;
if (amount_left_to_req == 0)
get_some_more = 0;
@@ -897,19 +920,22 @@ static int do_write(struct fsg_dev *fsg)
bh->outreq->length = amount;
bh->bulk_out_intended_length = amount;
bh->outreq->short_not_ok = 1;
- start_transfer(fsg, fsg->bulk_out, bh->outreq,
- &bh->outreq_busy, &bh->state);
- fsg->common->next_buffhd_to_fill = bh->next;
+ START_TRANSFER_OR(common, bulk_out, bh->outreq,
+ &bh->outreq_busy, &bh->state)
+ /* Don't know what to do if
+ * common->fsg is NULL */
+ return -EIO;
+ common->next_buffhd_to_fill = bh->next;
continue;
}
/* Write the received data to the backing file */
- bh = fsg->common->next_buffhd_to_drain;
+ bh = common->next_buffhd_to_drain;
if (bh->state == BUF_STATE_EMPTY && !get_some_more)
break; /* We stopped early */
if (bh->state == BUF_STATE_FULL) {
smp_rmb();
- fsg->common->next_buffhd_to_drain = bh->next;
+ common->next_buffhd_to_drain = bh->next;
bh->state = BUF_STATE_EMPTY;
/* Did something go wrong with the transfer? */
@@ -952,7 +978,7 @@ static int do_write(struct fsg_dev *fsg)
}
file_offset += nwritten;
amount_left_to_write -= nwritten;
- fsg->residue -= nwritten;
+ common->residue -= nwritten;
/* If an error occurred, report it and its position */
if (nwritten < amount) {
@@ -964,14 +990,14 @@ static int do_write(struct fsg_dev *fsg)
/* Did the host decide to stop early? */
if (bh->outreq->actual != bh->outreq->length) {
- fsg->short_packet_received = 1;
+ common->short_packet_received = 1;
break;
}
continue;
}
/* Wait for something to happen */
- rc = sleep_thread(fsg);
+ rc = sleep_thread(common);
if (rc)
return rc;
}
@@ -982,9 +1008,9 @@ static int do_write(struct fsg_dev *fsg)
/*-------------------------------------------------------------------------*/
-static int do_synchronize_cache(struct fsg_dev *fsg)
+static int do_synchronize_cache(struct fsg_common *common)
{
- struct fsg_lun *curlun = fsg->common->curlun;
+ struct fsg_lun *curlun = common->curlun;
int rc;
/* We ignore the requested LBA and write out all file's
@@ -1008,12 +1034,12 @@ static void invalidate_sub(struct fsg_lun *curlun)
VLDBG(curlun, "invalidate_inode_pages -> %ld\n", rc);
}
-static int do_verify(struct fsg_dev *fsg)
+static int do_verify(struct fsg_common *common)
{
- struct fsg_lun *curlun = fsg->common->curlun;
+ struct fsg_lun *curlun = common->curlun;
u32 lba;
u32 verification_length;
- struct fsg_buffhd *bh = fsg->common->next_buffhd_to_fill;
+ struct fsg_buffhd *bh = common->next_buffhd_to_fill;
loff_t file_offset, file_offset_tmp;
u32 amount_left;
unsigned int amount;
@@ -1021,7 +1047,7 @@ static int do_verify(struct fsg_dev *fsg)
/* Get the starting Logical Block Address and check that it's
* not too big */
- lba = get_unaligned_be32(&fsg->common->cmnd[2]);
+ lba = get_unaligned_be32(&common->cmnd[2]);
if (lba >= curlun->num_sectors) {
curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
return -EINVAL;
@@ -1029,12 +1055,12 @@ static int do_verify(struct fsg_dev *fsg)
/* We allow DPO (Disable Page Out = don't save data in the
* cache) but we don't implement it. */
- if ((fsg->common->cmnd[1] & ~0x10) != 0) {
+ if (common->cmnd[1] & ~0x10) {
curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
return -EINVAL;
}
- verification_length = get_unaligned_be16(&fsg->common->cmnd[7]);
+ verification_length = get_unaligned_be16(&common->cmnd[7]);
if (unlikely(verification_length == 0))
return -EIO; /* No default reply */
@@ -1106,13 +1132,13 @@ static int do_verify(struct fsg_dev *fsg)
/*-------------------------------------------------------------------------*/
-static int do_inquiry(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+static int do_inquiry(struct fsg_common *common, struct fsg_buffhd *bh)
{
- struct fsg_lun *curlun = fsg->common->curlun;
+ struct fsg_lun *curlun = common->curlun;
u8 *buf = (u8 *) bh->buf;
if (!curlun) { /* Unsupported LUNs are okay */
- fsg->bad_lun_okay = 1;
+ common->bad_lun_okay = 1;
memset(buf, 0, 36);
buf[0] = 0x7f; /* Unsupported, no device-type */
buf[4] = 31; /* Additional length */
@@ -1127,15 +1153,14 @@ static int do_inquiry(struct fsg_dev *fsg, struct fsg_buffhd *bh)
buf[5] = 0; /* No special options */
buf[6] = 0;
buf[7] = 0;
- memcpy(buf + 8, fsg->common->inquiry_string,
- sizeof fsg->common->inquiry_string);
+ memcpy(buf + 8, common->inquiry_string, sizeof common->inquiry_string);
return 36;
}
-static int do_request_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+static int do_request_sense(struct fsg_common *common, struct fsg_buffhd *bh)
{
- struct fsg_lun *curlun = fsg->common->curlun;
+ struct fsg_lun *curlun = common->curlun;
u8 *buf = (u8 *) bh->buf;
u32 sd, sdinfo;
int valid;
@@ -1163,7 +1188,7 @@ static int do_request_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh)
#endif
if (!curlun) { /* Unsupported LUNs are okay */
- fsg->bad_lun_okay = 1;
+ common->bad_lun_okay = 1;
sd = SS_LOGICAL_UNIT_NOT_SUPPORTED;
sdinfo = 0;
valid = 0;
@@ -1187,11 +1212,11 @@ static int do_request_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh)
}
-static int do_read_capacity(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+static int do_read_capacity(struct fsg_common *common, struct fsg_buffhd *bh)
{
- struct fsg_lun *curlun = fsg->common->curlun;
- u32 lba = get_unaligned_be32(&fsg->common->cmnd[2]);
- int pmi = fsg->common->cmnd[8];
+ struct fsg_lun *curlun = common->curlun;
+ u32 lba = get_unaligned_be32(&common->cmnd[2]);
+ int pmi = common->cmnd[8];
u8 *buf = (u8 *) bh->buf;
/* Check the PMI and LBA fields */
@@ -1207,14 +1232,14 @@ static int do_read_capacity(struct fsg_dev *fsg, struct fsg_buffhd *bh)
}
-static int do_read_header(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+static int do_read_header(struct fsg_common *common, struct fsg_buffhd *bh)
{
- struct fsg_lun *curlun = fsg->common->curlun;
- int msf = fsg->common->cmnd[1] & 0x02;
- u32 lba = get_unaligned_be32(&fsg->common->cmnd[2]);
+ struct fsg_lun *curlun = common->curlun;
+ int msf = common->cmnd[1] & 0x02;
+ u32 lba = get_unaligned_be32(&common->cmnd[2]);
u8 *buf = (u8 *) bh->buf;
- if ((fsg->common->cmnd[1] & ~0x02) != 0) { /* Mask away MSF */
+ if (common->cmnd[1] & ~0x02) { /* Mask away MSF */
curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
return -EINVAL;
}
@@ -1230,14 +1255,14 @@ static int do_read_header(struct fsg_dev *fsg, struct fsg_buffhd *bh)
}
-static int do_read_toc(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+static int do_read_toc(struct fsg_common *common, struct fsg_buffhd *bh)
{
- struct fsg_lun *curlun = fsg->common->curlun;
- int msf = fsg->common->cmnd[1] & 0x02;
- int start_track = fsg->common->cmnd[6];
+ struct fsg_lun *curlun = common->curlun;
+ int msf = common->cmnd[1] & 0x02;
+ int start_track = common->cmnd[6];
u8 *buf = (u8 *) bh->buf;
- if ((fsg->common->cmnd[1] & ~0x02) != 0 || /* Mask away MSF */
+ if ((common->cmnd[1] & ~0x02) != 0 || /* Mask away MSF */
start_track > 1) {
curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
return -EINVAL;
@@ -1258,10 +1283,10 @@ static int do_read_toc(struct fsg_dev *fsg, struct fsg_buffhd *bh)
}
-static int do_mode_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+static int do_mode_sense(struct fsg_common *common, struct fsg_buffhd *bh)
{
- struct fsg_lun *curlun = fsg->common->curlun;
- int mscmnd = fsg->common->cmnd[0];
+ struct fsg_lun *curlun = common->curlun;
+ int mscmnd = common->cmnd[0];
u8 *buf = (u8 *) bh->buf;
u8 *buf0 = buf;
int pc, page_code;
@@ -1269,12 +1294,12 @@ static int do_mode_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh)
int valid_page = 0;
int len, limit;
- if ((fsg->common->cmnd[1] & ~0x08) != 0) { /* Mask away DBD */
+ if ((common->cmnd[1] & ~0x08) != 0) { /* Mask away DBD */
curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
return -EINVAL;
}
- pc = fsg->common->cmnd[2] >> 6;
- page_code = fsg->common->cmnd[2] & 0x3f;
+ pc = common->cmnd[2] >> 6;
+ page_code = common->cmnd[2] & 0x3f;
if (pc == 3) {
curlun->sense_data = SS_SAVING_PARAMETERS_NOT_SUPPORTED;
return -EINVAL;
@@ -1339,32 +1364,32 @@ static int do_mode_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh)
}
-static int do_start_stop(struct fsg_dev *fsg)
+static int do_start_stop(struct fsg_common *common)
{
- if (!fsg->common->curlun) {
+ if (!common->curlun) {
return -EINVAL;
- } else if (!fsg->common->curlun->removable) {
- fsg->common->curlun->sense_data = SS_INVALID_COMMAND;
+ } else if (!common->curlun->removable) {
+ common->curlun->sense_data = SS_INVALID_COMMAND;
return -EINVAL;
}
return 0;
}
-static int do_prevent_allow(struct fsg_dev *fsg)
+static int do_prevent_allow(struct fsg_common *common)
{
- struct fsg_lun *curlun = fsg->common->curlun;
+ struct fsg_lun *curlun = common->curlun;
int prevent;
- if (!fsg->common->curlun) {
+ if (!common->curlun) {
return -EINVAL;
- } else if (!fsg->common->curlun->removable) {
- fsg->common->curlun->sense_data = SS_INVALID_COMMAND;
+ } else if (!common->curlun->removable) {
+ common->curlun->sense_data = SS_INVALID_COMMAND;
return -EINVAL;
}
- prevent = fsg->common->cmnd[4] & 0x01;
- if ((fsg->common->cmnd[4] & ~0x01) != 0) { /* Mask away Prevent */
+ prevent = common->cmnd[4] & 0x01;
+ if ((common->cmnd[4] & ~0x01) != 0) { /* Mask away Prevent */
curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
return -EINVAL;
}
@@ -1376,10 +1401,10 @@ static int do_prevent_allow(struct fsg_dev *fsg)
}
-static int do_read_format_capacities(struct fsg_dev *fsg,
+static int do_read_format_capacities(struct fsg_common *common,
struct fsg_buffhd *bh)
{
- struct fsg_lun *curlun = fsg->common->curlun;
+ struct fsg_lun *curlun = common->curlun;
u8 *buf = (u8 *) bh->buf;
buf[0] = buf[1] = buf[2] = 0;
@@ -1394,12 +1419,13 @@ static int do_read_format_capacities(struct fsg_dev *fsg,
}
-static int do_mode_select(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+static int do_mode_select(struct fsg_common *common, struct fsg_buffhd *bh)
{
- struct fsg_lun *curlun = fsg->common->curlun;
+ struct fsg_lun *curlun = common->curlun;
/* We don't support MODE SELECT */
- curlun->sense_data = SS_INVALID_COMMAND;
+ if (curlun)
+ curlun->sense_data = SS_INVALID_COMMAND;
return -EINVAL;
}
@@ -1459,73 +1485,78 @@ static int pad_with_zeros(struct fsg_dev *fsg)
int rc;
bh->state = BUF_STATE_EMPTY; /* For the first iteration */
- fsg->usb_amount_left = nkeep + fsg->residue;
- while (fsg->usb_amount_left > 0) {
+ fsg->common->usb_amount_left = nkeep + fsg->common->residue;
+ while (fsg->common->usb_amount_left > 0) {
/* Wait for the next buffer to be free */
while (bh->state != BUF_STATE_EMPTY) {
- rc = sleep_thread(fsg);
+ rc = sleep_thread(fsg->common);
if (rc)
return rc;
}
- nsend = min(fsg->usb_amount_left, FSG_BUFLEN);
+ nsend = min(fsg->common->usb_amount_left, FSG_BUFLEN);
memset(bh->buf + nkeep, 0, nsend - nkeep);
bh->inreq->length = nsend;
bh->inreq->zero = 0;
start_transfer(fsg, fsg->bulk_in, bh->inreq,
&bh->inreq_busy, &bh->state);
bh = fsg->common->next_buffhd_to_fill = bh->next;
- fsg->usb_amount_left -= nsend;
+ fsg->common->usb_amount_left -= nsend;
nkeep = 0;
}
return 0;
}
-static int throw_away_data(struct fsg_dev *fsg)
+static int throw_away_data(struct fsg_common *common)
{
struct fsg_buffhd *bh;
u32 amount;
int rc;
- for (bh = fsg->common->next_buffhd_to_drain;
- bh->state != BUF_STATE_EMPTY || fsg->usb_amount_left > 0;
- bh = fsg->common->next_buffhd_to_drain) {
+ for (bh = common->next_buffhd_to_drain;
+ bh->state != BUF_STATE_EMPTY || common->usb_amount_left > 0;
+ bh = common->next_buffhd_to_drain) {
/* Throw away the data in a filled buffer */
if (bh->state == BUF_STATE_FULL) {
smp_rmb();
bh->state = BUF_STATE_EMPTY;
- fsg->common->next_buffhd_to_drain = bh->next;
+ common->next_buffhd_to_drain = bh->next;
/* A short packet or an error ends everything */
if (bh->outreq->actual != bh->outreq->length ||
bh->outreq->status != 0) {
- raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT);
+ raise_exception(common,
+ FSG_STATE_ABORT_BULK_OUT);
return -EINTR;
}
continue;
}
/* Try to submit another request if we need one */
- bh = fsg->common->next_buffhd_to_fill;
- if (bh->state == BUF_STATE_EMPTY && fsg->usb_amount_left > 0) {
- amount = min(fsg->usb_amount_left, FSG_BUFLEN);
+ bh = common->next_buffhd_to_fill;
+ if (bh->state == BUF_STATE_EMPTY
+ && common->usb_amount_left > 0) {
+ amount = min(common->usb_amount_left, FSG_BUFLEN);
/* amount is always divisible by 512, hence by
* the bulk-out maxpacket size */
bh->outreq->length = amount;
bh->bulk_out_intended_length = amount;
bh->outreq->short_not_ok = 1;
- start_transfer(fsg, fsg->bulk_out, bh->outreq,
- &bh->outreq_busy, &bh->state);
- fsg->common->next_buffhd_to_fill = bh->next;
- fsg->usb_amount_left -= amount;
+ START_TRANSFER_OR(common, bulk_out, bh->outreq,
+ &bh->outreq_busy, &bh->state)
+ /* Don't know what to do if
+ * common->fsg is NULL */
+ return -EIO;
+ common->next_buffhd_to_fill = bh->next;
+ common->usb_amount_left -= amount;
continue;
}
/* Otherwise wait for something to happen */
- rc = sleep_thread(fsg);
+ rc = sleep_thread(common);
if (rc)
return rc;
}
@@ -1533,12 +1564,12 @@ static int throw_away_data(struct fsg_dev *fsg)
}
-static int finish_reply(struct fsg_dev *fsg)
+static int finish_reply(struct fsg_common *common)
{
- struct fsg_buffhd *bh = fsg->common->next_buffhd_to_fill;
+ struct fsg_buffhd *bh = common->next_buffhd_to_fill;
int rc = 0;
- switch (fsg->data_dir) {
+ switch (common->data_dir) {
case DATA_DIR_NONE:
break; /* Nothing to send */
@@ -1547,47 +1578,60 @@ static int finish_reply(struct fsg_dev *fsg)
* try to send or receive any data. So stall both bulk pipes
* if we can and wait for a reset. */
case DATA_DIR_UNKNOWN:
- if (fsg->can_stall) {
- fsg_set_halt(fsg, fsg->bulk_out);
- rc = halt_bulk_in_endpoint(fsg);
+ if (!common->can_stall) {
+ /* Nothing */
+ } else if (fsg_is_set(common)) {
+ fsg_set_halt(common->fsg, common->fsg->bulk_out);
+ rc = halt_bulk_in_endpoint(common->fsg);
+ } else {
+ /* Don't know what to do if common->fsg is NULL */
+ rc = -EIO;
}
break;
/* All but the last buffer of data must have already been sent */
case DATA_DIR_TO_HOST:
- if (fsg->data_size == 0) {
+ if (common->data_size == 0) {
/* Nothing to send */
/* If there's no residue, simply send the last buffer */
- } else if (fsg->residue == 0) {
+ } else if (common->residue == 0) {
bh->inreq->zero = 0;
- start_transfer(fsg, fsg->bulk_in, bh->inreq,
- &bh->inreq_busy, &bh->state);
- fsg->common->next_buffhd_to_fill = bh->next;
+ START_TRANSFER_OR(common, bulk_in, bh->inreq,
+ &bh->inreq_busy, &bh->state)
+ return -EIO;
+ common->next_buffhd_to_fill = bh->next;
/* For Bulk-only, if we're allowed to stall then send the
* short packet and halt the bulk-in endpoint. If we can't
* stall, pad out the remaining data with 0's. */
- } else if (fsg->can_stall) {
+ } else if (common->can_stall) {
bh->inreq->zero = 1;
- start_transfer(fsg, fsg->bulk_in, bh->inreq,
- &bh->inreq_busy, &bh->state);
- fsg->common->next_buffhd_to_fill = bh->next;
- rc = halt_bulk_in_endpoint(fsg);
+ START_TRANSFER_OR(common, bulk_in, bh->inreq,
+ &bh->inreq_busy, &bh->state)
+ /* Don't know what to do if
+ * common->fsg is NULL */
+ rc = -EIO;
+ common->next_buffhd_to_fill = bh->next;
+ if (common->fsg)
+ rc = halt_bulk_in_endpoint(common->fsg);
+ } else if (fsg_is_set(common)) {
+ rc = pad_with_zeros(common->fsg);
} else {
- rc = pad_with_zeros(fsg);
+ /* Don't know what to do if common->fsg is NULL */
+ rc = -EIO;
}
break;
/* We have processed all we want from the data the host has sent.
* There may still be outstanding bulk-out requests. */
case DATA_DIR_FROM_HOST:
- if (fsg->residue == 0) {
+ if (common->residue == 0) {
/* Nothing to receive */
/* Did the host stop sending unexpectedly early? */
- } else if (fsg->short_packet_received) {
- raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT);
+ } else if (common->short_packet_received) {
+ raise_exception(common, FSG_STATE_ABORT_BULK_OUT);
rc = -EINTR;
/* We haven't processed all the incoming data. Even though
@@ -1597,16 +1641,18 @@ static int finish_reply(struct fsg_dev *fsg)
* STALL. Not realizing the endpoint was halted, it wouldn't
* clear the halt -- leading to problems later on. */
#if 0
- } else if (fsg->can_stall) {
- fsg_set_halt(fsg, fsg->bulk_out);
- raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT);
+ } else if (common->can_stall) {
+ if (fsg_is_set(common))
+ fsg_set_halt(common->fsg,
+ common->fsg->bulk_out);
+ raise_exception(common, FSG_STATE_ABORT_BULK_OUT);
rc = -EINTR;
#endif
/* We can't stall. Read in the excess data and throw it
* all away. */
} else {
- rc = throw_away_data(fsg);
+ rc = throw_away_data(common);
}
break;
}
@@ -1614,9 +1660,9 @@ static int finish_reply(struct fsg_dev *fsg)
}
-static int send_status(struct fsg_dev *fsg)
+static int send_status(struct fsg_common *common)
{
- struct fsg_lun *curlun = fsg->common->curlun;
+ struct fsg_lun *curlun = common->curlun;
struct fsg_buffhd *bh;
struct bulk_cs_wrap *csw;
int rc;
@@ -1624,9 +1670,9 @@ static int send_status(struct fsg_dev *fsg)
u32 sd, sdinfo = 0;
/* Wait for the next buffer to become available */
- bh = fsg->common->next_buffhd_to_fill;
+ bh = common->next_buffhd_to_fill;
while (bh->state != BUF_STATE_EMPTY) {
- rc = sleep_thread(fsg);
+ rc = sleep_thread(common);
if (rc)
return rc;
}
@@ -1634,19 +1680,19 @@ static int send_status(struct fsg_dev *fsg)
if (curlun) {
sd = curlun->sense_data;
sdinfo = curlun->sense_data_info;
- } else if (fsg->bad_lun_okay)
+ } else if (common->bad_lun_okay)
sd = SS_NO_SENSE;
else
sd = SS_LOGICAL_UNIT_NOT_SUPPORTED;
- if (fsg->phase_error) {
- DBG(fsg, "sending phase-error status\n");
+ if (common->phase_error) {
+ DBG(common, "sending phase-error status\n");
status = USB_STATUS_PHASE_ERROR;
sd = SS_INVALID_COMMAND;
} else if (sd != SS_NO_SENSE) {
- DBG(fsg, "sending command-failure status\n");
+ DBG(common, "sending command-failure status\n");
status = USB_STATUS_FAIL;
- VDBG(fsg, " sense data: SK x%02x, ASC x%02x, ASCQ x%02x;"
+ VDBG(common, " sense data: SK x%02x, ASC x%02x, ASCQ x%02x;"
" info x%x\n",
SK(sd), ASC(sd), ASCQ(sd), sdinfo);
}
@@ -1655,16 +1701,18 @@ static int send_status(struct fsg_dev *fsg)
csw = (void *)bh->buf;
csw->Signature = cpu_to_le32(USB_BULK_CS_SIG);
- csw->Tag = fsg->tag;
- csw->Residue = cpu_to_le32(fsg->residue);
+ csw->Tag = common->tag;
+ csw->Residue = cpu_to_le32(common->residue);
csw->Status = status;
bh->inreq->length = USB_BULK_CS_WRAP_LEN;
bh->inreq->zero = 0;
- start_transfer(fsg, fsg->bulk_in, bh->inreq,
- &bh->inreq_busy, &bh->state);
+ START_TRANSFER_OR(common, bulk_in, bh->inreq,
+ &bh->inreq_busy, &bh->state)
+ /* Don't know what to do if common->fsg is NULL */
+ return -EIO;
- fsg->common->next_buffhd_to_fill = bh->next;
+ common->next_buffhd_to_fill = bh->next;
return 0;
}
@@ -1673,52 +1721,47 @@ static int send_status(struct fsg_dev *fsg)
/* Check whether the command is properly formed and whether its data size
* and direction agree with the values we already have. */
-static int check_command(struct fsg_dev *fsg, int cmnd_size,
+static int check_command(struct fsg_common *common, int cmnd_size,
enum data_direction data_dir, unsigned int mask,
int needs_medium, const char *name)
{
int i;
- int lun = fsg->common->cmnd[1] >> 5;
+ int lun = common->cmnd[1] >> 5;
static const char dirletter[4] = {'u', 'o', 'i', 'n'};
char hdlen[20];
struct fsg_lun *curlun;
hdlen[0] = 0;
- if (fsg->data_dir != DATA_DIR_UNKNOWN)
- sprintf(hdlen, ", H%c=%u", dirletter[(int) fsg->data_dir],
- fsg->data_size);
- VDBG(fsg, "SCSI command: %s; Dc=%d, D%c=%u; Hc=%d%s\n",
+ if (common->data_dir != DATA_DIR_UNKNOWN)
+ sprintf(hdlen, ", H%c=%u", dirletter[(int) common->data_dir],
+ common->data_size);
+ VDBG(common, "SCSI command: %s; Dc=%d, D%c=%u; Hc=%d%s\n",
name, cmnd_size, dirletter[(int) data_dir],
- fsg->data_size_from_cmnd, fsg->common->cmnd_size, hdlen);
+ common->data_size_from_cmnd, common->cmnd_size, hdlen);
/* We can't reply at all until we know the correct data direction
* and size. */
- if (fsg->data_size_from_cmnd == 0)
+ if (common->data_size_from_cmnd == 0)
data_dir = DATA_DIR_NONE;
- if (fsg->data_dir == DATA_DIR_UNKNOWN) { /* CB or CBI */
- fsg->data_dir = data_dir;
- fsg->data_size = fsg->data_size_from_cmnd;
-
- } else { /* Bulk-only */
- if (fsg->data_size < fsg->data_size_from_cmnd) {
-
- /* Host data size < Device data size is a phase error.
- * Carry out the command, but only transfer as much
- * as we are allowed. */
- fsg->data_size_from_cmnd = fsg->data_size;
- fsg->phase_error = 1;
- }
+ if (common->data_size < common->data_size_from_cmnd) {
+ /* Host data size < Device data size is a phase error.
+ * Carry out the command, but only transfer as much as
+ * we are allowed. */
+ common->data_size_from_cmnd = common->data_size;
+ common->phase_error = 1;
}
- fsg->residue = fsg->usb_amount_left = fsg->data_size;
+ common->residue = common->data_size;
+ common->usb_amount_left = common->data_size;
/* Conflicting data directions is a phase error */
- if (fsg->data_dir != data_dir && fsg->data_size_from_cmnd > 0) {
- fsg->phase_error = 1;
+ if (common->data_dir != data_dir
+ && common->data_size_from_cmnd > 0) {
+ common->phase_error = 1;
return -EINVAL;
}
/* Verify the length of the command itself */
- if (cmnd_size != fsg->common->cmnd_size) {
+ if (cmnd_size != common->cmnd_size) {
/* Special case workaround: There are plenty of buggy SCSI
* implementations. Many have issues with cbw->Length
@@ -1732,40 +1775,41 @@ static int check_command(struct fsg_dev *fsg, int cmnd_size,
* REQUEST SENSE with cbw->Length == 10 where it should
* be 6 as well.
*/
- if (cmnd_size <= fsg->common->cmnd_size) {
- DBG(fsg, "%s is buggy! Expected length %d "
+ if (cmnd_size <= common->cmnd_size) {
+ DBG(common, "%s is buggy! Expected length %d "
"but we got %d\n", name,
- cmnd_size, fsg->common->cmnd_size);
- cmnd_size = fsg->common->cmnd_size;
+ cmnd_size, common->cmnd_size);
+ cmnd_size = common->cmnd_size;
} else {
- fsg->phase_error = 1;
+ common->phase_error = 1;
return -EINVAL;
}
}
/* Check that the LUN values are consistent */
- if (fsg->common->lun != lun)
- DBG(fsg, "using LUN %d from CBW, not LUN %d from CDB\n",
- fsg->common->lun, lun);
+ if (common->lun != lun)
+ DBG(common, "using LUN %d from CBW, not LUN %d from CDB\n",
+ common->lun, lun);
/* Check the LUN */
- if (fsg->common->lun >= 0 && fsg->common->lun < fsg->common->nluns) {
- curlun = &fsg->common->luns[fsg->common->lun];
- fsg->common->curlun = curlun;
- if (fsg->common->cmnd[0] != SC_REQUEST_SENSE) {
+ if (common->lun >= 0 && common->lun < common->nluns) {
+ curlun = &common->luns[common->lun];
+ common->curlun = curlun;
+ if (common->cmnd[0] != SC_REQUEST_SENSE) {
curlun->sense_data = SS_NO_SENSE;
curlun->sense_data_info = 0;
curlun->info_valid = 0;
}
} else {
- fsg->common->curlun = curlun = NULL;
- fsg->bad_lun_okay = 0;
+ common->curlun = NULL;
+ curlun = NULL;
+ common->bad_lun_okay = 0;
/* INQUIRY and REQUEST SENSE commands are explicitly allowed
* to use unsupported LUNs; all others may not. */
- if (fsg->common->cmnd[0] != SC_INQUIRY &&
- fsg->common->cmnd[0] != SC_REQUEST_SENSE) {
- DBG(fsg, "unsupported LUN %d\n", fsg->common->lun);
+ if (common->cmnd[0] != SC_INQUIRY &&
+ common->cmnd[0] != SC_REQUEST_SENSE) {
+ DBG(common, "unsupported LUN %d\n", common->lun);
return -EINVAL;
}
}
@@ -1773,17 +1817,17 @@ static int check_command(struct fsg_dev *fsg, int cmnd_size,
/* If a unit attention condition exists, only INQUIRY and
* REQUEST SENSE commands are allowed; anything else must fail. */
if (curlun && curlun->unit_attention_data != SS_NO_SENSE &&
- fsg->common->cmnd[0] != SC_INQUIRY &&
- fsg->common->cmnd[0] != SC_REQUEST_SENSE) {
+ common->cmnd[0] != SC_INQUIRY &&
+ common->cmnd[0] != SC_REQUEST_SENSE) {
curlun->sense_data = curlun->unit_attention_data;
curlun->unit_attention_data = SS_NO_SENSE;
return -EINVAL;
}
/* Check that only command bytes listed in the mask are non-zero */
- fsg->common->cmnd[1] &= 0x1f; /* Mask away the LUN */
+ common->cmnd[1] &= 0x1f; /* Mask away the LUN */
for (i = 1; i < cmnd_size; ++i) {
- if (fsg->common->cmnd[i] && !(mask & (1 << i))) {
+ if (common->cmnd[i] && !(mask & (1 << i))) {
if (curlun)
curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
return -EINVAL;
@@ -1801,7 +1845,7 @@ static int check_command(struct fsg_dev *fsg, int cmnd_size,
}
-static int do_scsi_command(struct fsg_dev *fsg)
+static int do_scsi_command(struct fsg_common *common)
{
struct fsg_buffhd *bh;
int rc;
@@ -1809,182 +1853,181 @@ static int do_scsi_command(struct fsg_dev *fsg)
int i;
static char unknown[16];
- dump_cdb(fsg->common);
+ dump_cdb(common);
/* Wait for the next buffer to become available for data or status */
- bh = fsg->common->next_buffhd_to_fill;
- fsg->common->next_buffhd_to_drain = bh;
+ bh = common->next_buffhd_to_fill;
+ common->next_buffhd_to_drain = bh;
while (bh->state != BUF_STATE_EMPTY) {
- rc = sleep_thread(fsg);
+ rc = sleep_thread(common);
if (rc)
return rc;
}
- fsg->phase_error = 0;
- fsg->short_packet_received = 0;
+ common->phase_error = 0;
+ common->short_packet_received = 0;
- /* We're using the backing file */
- down_read(&fsg->common->filesem);
- switch (fsg->common->cmnd[0]) {
+ down_read(&common->filesem); /* We're using the backing file */
+ switch (common->cmnd[0]) {
case SC_INQUIRY:
- fsg->data_size_from_cmnd = fsg->common->cmnd[4];
- reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
+ common->data_size_from_cmnd = common->cmnd[4];
+ reply = check_command(common, 6, DATA_DIR_TO_HOST,
(1<<4), 0,
"INQUIRY");
if (reply == 0)
- reply = do_inquiry(fsg, bh);
+ reply = do_inquiry(common, bh);
break;
case SC_MODE_SELECT_6:
- fsg->data_size_from_cmnd = fsg->common->cmnd[4];
- reply = check_command(fsg, 6, DATA_DIR_FROM_HOST,
+ common->data_size_from_cmnd = common->cmnd[4];
+ reply = check_command(common, 6, DATA_DIR_FROM_HOST,
(1<<1) | (1<<4), 0,
"MODE SELECT(6)");
if (reply == 0)
- reply = do_mode_select(fsg, bh);
+ reply = do_mode_select(common, bh);
break;
case SC_MODE_SELECT_10:
- fsg->data_size_from_cmnd =
- get_unaligned_be16(&fsg->common->cmnd[7]);
- reply = check_command(fsg, 10, DATA_DIR_FROM_HOST,
+ common->data_size_from_cmnd =
+ get_unaligned_be16(&common->cmnd[7]);
+ reply = check_command(common, 10, DATA_DIR_FROM_HOST,
(1<<1) | (3<<7), 0,
"MODE SELECT(10)");
if (reply == 0)
- reply = do_mode_select(fsg, bh);
+ reply = do_mode_select(common, bh);
break;
case SC_MODE_SENSE_6:
- fsg->data_size_from_cmnd = fsg->common->cmnd[4];
- reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
+ common->data_size_from_cmnd = common->cmnd[4];
+ reply = check_command(common, 6, DATA_DIR_TO_HOST,
(1<<1) | (1<<2) | (1<<4), 0,
"MODE SENSE(6)");
if (reply == 0)
- reply = do_mode_sense(fsg, bh);
+ reply = do_mode_sense(common, bh);
break;
case SC_MODE_SENSE_10:
- fsg->data_size_from_cmnd =
- get_unaligned_be16(&fsg->common->cmnd[7]);
- reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
+ common->data_size_from_cmnd =
+ get_unaligned_be16(&common->cmnd[7]);
+ reply = check_command(common, 10, DATA_DIR_TO_HOST,
(1<<1) | (1<<2) | (3<<7), 0,
"MODE SENSE(10)");
if (reply == 0)
- reply = do_mode_sense(fsg, bh);
+ reply = do_mode_sense(common, bh);
break;
case SC_PREVENT_ALLOW_MEDIUM_REMOVAL:
- fsg->data_size_from_cmnd = 0;
- reply = check_command(fsg, 6, DATA_DIR_NONE,
+ common->data_size_from_cmnd = 0;
+ reply = check_command(common, 6, DATA_DIR_NONE,
(1<<4), 0,
"PREVENT-ALLOW MEDIUM REMOVAL");
if (reply == 0)
- reply = do_prevent_allow(fsg);
+ reply = do_prevent_allow(common);
break;
case SC_READ_6:
- i = fsg->common->cmnd[4];
- fsg->data_size_from_cmnd = (i == 0 ? 256 : i) << 9;
- reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
+ i = common->cmnd[4];
+ common->data_size_from_cmnd = (i == 0 ? 256 : i) << 9;
+ reply = check_command(common, 6, DATA_DIR_TO_HOST,
(7<<1) | (1<<4), 1,
"READ(6)");
if (reply == 0)
- reply = do_read(fsg);
+ reply = do_read(common);
break;
case SC_READ_10:
- fsg->data_size_from_cmnd =
- get_unaligned_be16(&fsg->common->cmnd[7]) << 9;
- reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
+ common->data_size_from_cmnd =
+ get_unaligned_be16(&common->cmnd[7]) << 9;
+ reply = check_command(common, 10, DATA_DIR_TO_HOST,
(1<<1) | (0xf<<2) | (3<<7), 1,
"READ(10)");
if (reply == 0)
- reply = do_read(fsg);
+ reply = do_read(common);
break;
case SC_READ_12:
- fsg->data_size_from_cmnd =
- get_unaligned_be32(&fsg->common->cmnd[6]) << 9;
- reply = check_command(fsg, 12, DATA_DIR_TO_HOST,
+ common->data_size_from_cmnd =
+ get_unaligned_be32(&common->cmnd[6]) << 9;
+ reply = check_command(common, 12, DATA_DIR_TO_HOST,
(1<<1) | (0xf<<2) | (0xf<<6), 1,
"READ(12)");
if (reply == 0)
- reply = do_read(fsg);
+ reply = do_read(common);
break;
case SC_READ_CAPACITY:
- fsg->data_size_from_cmnd = 8;
- reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
+ common->data_size_from_cmnd = 8;
+ reply = check_command(common, 10, DATA_DIR_TO_HOST,
(0xf<<2) | (1<<8), 1,
"READ CAPACITY");
if (reply == 0)
- reply = do_read_capacity(fsg, bh);
+ reply = do_read_capacity(common, bh);
break;
case SC_READ_HEADER:
- if (!fsg->common->curlun || !fsg->common->curlun->cdrom)
+ if (!common->curlun || !common->curlun->cdrom)
goto unknown_cmnd;
- fsg->data_size_from_cmnd =
- get_unaligned_be16(&fsg->common->cmnd[7]);
- reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
+ common->data_size_from_cmnd =
+ get_unaligned_be16(&common->cmnd[7]);
+ reply = check_command(common, 10, DATA_DIR_TO_HOST,
(3<<7) | (0x1f<<1), 1,
"READ HEADER");
if (reply == 0)
- reply = do_read_header(fsg, bh);
+ reply = do_read_header(common, bh);
break;
case SC_READ_TOC:
- if (!fsg->common->curlun || !fsg->common->curlun->cdrom)
+ if (!common->curlun || !common->curlun->cdrom)
goto unknown_cmnd;
- fsg->data_size_from_cmnd =
- get_unaligned_be16(&fsg->common->cmnd[7]);
- reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
+ common->data_size_from_cmnd =
+ get_unaligned_be16(&common->cmnd[7]);
+ reply = check_command(common, 10, DATA_DIR_TO_HOST,
(7<<6) | (1<<1), 1,
"READ TOC");
if (reply == 0)
- reply = do_read_toc(fsg, bh);
+ reply = do_read_toc(common, bh);
break;
case SC_READ_FORMAT_CAPACITIES:
- fsg->data_size_from_cmnd =
- get_unaligned_be16(&fsg->common->cmnd[7]);
- reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
+ common->data_size_from_cmnd =
+ get_unaligned_be16(&common->cmnd[7]);
+ reply = check_command(common, 10, DATA_DIR_TO_HOST,
(3<<7), 1,
"READ FORMAT CAPACITIES");
if (reply == 0)
- reply = do_read_format_capacities(fsg, bh);
+ reply = do_read_format_capacities(common, bh);
break;
case SC_REQUEST_SENSE:
- fsg->data_size_from_cmnd = fsg->common->cmnd[4];
- reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
+ common->data_size_from_cmnd = common->cmnd[4];
+ reply = check_command(common, 6, DATA_DIR_TO_HOST,
(1<<4), 0,
"REQUEST SENSE");
if (reply == 0)
- reply = do_request_sense(fsg, bh);
+ reply = do_request_sense(common, bh);
break;
case SC_START_STOP_UNIT:
- fsg->data_size_from_cmnd = 0;
- reply = check_command(fsg, 6, DATA_DIR_NONE,
+ common->data_size_from_cmnd = 0;
+ reply = check_command(common, 6, DATA_DIR_NONE,
(1<<1) | (1<<4), 0,
"START-STOP UNIT");
if (reply == 0)
- reply = do_start_stop(fsg);
+ reply = do_start_stop(common);
break;
case SC_SYNCHRONIZE_CACHE:
- fsg->data_size_from_cmnd = 0;
- reply = check_command(fsg, 10, DATA_DIR_NONE,
+ common->data_size_from_cmnd = 0;
+ reply = check_command(common, 10, DATA_DIR_NONE,
(0xf<<2) | (3<<7), 1,
"SYNCHRONIZE CACHE");
if (reply == 0)
- reply = do_synchronize_cache(fsg);
+ reply = do_synchronize_cache(common);
break;
case SC_TEST_UNIT_READY:
- fsg->data_size_from_cmnd = 0;
- reply = check_command(fsg, 6, DATA_DIR_NONE,
+ common->data_size_from_cmnd = 0;
+ reply = check_command(common, 6, DATA_DIR_NONE,
0, 1,
"TEST UNIT READY");
break;
@@ -1992,42 +2035,42 @@ static int do_scsi_command(struct fsg_dev *fsg)
/* Although optional, this command is used by MS-Windows. We
* support a minimal version: BytChk must be 0. */
case SC_VERIFY:
- fsg->data_size_from_cmnd = 0;
- reply = check_command(fsg, 10, DATA_DIR_NONE,
+ common->data_size_from_cmnd = 0;
+ reply = check_command(common, 10, DATA_DIR_NONE,
(1<<1) | (0xf<<2) | (3<<7), 1,
"VERIFY");
if (reply == 0)
- reply = do_verify(fsg);
+ reply = do_verify(common);
break;
case SC_WRITE_6:
- i = fsg->common->cmnd[4];
- fsg->data_size_from_cmnd = (i == 0 ? 256 : i) << 9;
- reply = check_command(fsg, 6, DATA_DIR_FROM_HOST,
+ i = common->cmnd[4];
+ common->data_size_from_cmnd = (i == 0 ? 256 : i) << 9;
+ reply = check_command(common, 6, DATA_DIR_FROM_HOST,
(7<<1) | (1<<4), 1,
"WRITE(6)");
if (reply == 0)
- reply = do_write(fsg);
+ reply = do_write(common);
break;
case SC_WRITE_10:
- fsg->data_size_from_cmnd =
- get_unaligned_be16(&fsg->common->cmnd[7]) << 9;
- reply = check_command(fsg, 10, DATA_DIR_FROM_HOST,
+ common->data_size_from_cmnd =
+ get_unaligned_be16(&common->cmnd[7]) << 9;
+ reply = check_command(common, 10, DATA_DIR_FROM_HOST,
(1<<1) | (0xf<<2) | (3<<7), 1,
"WRITE(10)");
if (reply == 0)
- reply = do_write(fsg);
+ reply = do_write(common);
break;
case SC_WRITE_12:
- fsg->data_size_from_cmnd =
- get_unaligned_be32(&fsg->common->cmnd[6]) << 9;
- reply = check_command(fsg, 12, DATA_DIR_FROM_HOST,
+ common->data_size_from_cmnd =
+ get_unaligned_be32(&common->cmnd[6]) << 9;
+ reply = check_command(common, 12, DATA_DIR_FROM_HOST,
(1<<1) | (0xf<<2) | (0xf<<6), 1,
"WRITE(12)");
if (reply == 0)
- reply = do_write(fsg);
+ reply = do_write(common);
break;
/* Some mandatory commands that we recognize but don't implement.
@@ -2042,17 +2085,17 @@ static int do_scsi_command(struct fsg_dev *fsg)
default:
unknown_cmnd:
- fsg->data_size_from_cmnd = 0;
- sprintf(unknown, "Unknown x%02x", fsg->common->cmnd[0]);
- reply = check_command(fsg, fsg->common->cmnd_size,
+ common->data_size_from_cmnd = 0;
+ sprintf(unknown, "Unknown x%02x", common->cmnd[0]);
+ reply = check_command(common, common->cmnd_size,
DATA_DIR_UNKNOWN, 0xff, 0, unknown);
if (reply == 0) {
- fsg->common->curlun->sense_data = SS_INVALID_COMMAND;
+ common->curlun->sense_data = SS_INVALID_COMMAND;
reply = -EINVAL;
}
break;
}
- up_read(&fsg->common->filesem);
+ up_read(&common->filesem);
if (reply == -EINTR || signal_pending(current))
return -EINTR;
@@ -2060,11 +2103,11 @@ unknown_cmnd:
/* Set up the single reply buffer for finish_reply() */
if (reply == -EINVAL)
reply = 0; /* Error reply length */
- if (reply >= 0 && fsg->data_dir == DATA_DIR_TO_HOST) {
- reply = min((u32) reply, fsg->data_size_from_cmnd);
+ if (reply >= 0 && common->data_dir == DATA_DIR_TO_HOST) {
+ reply = min((u32) reply, common->data_size_from_cmnd);
bh->inreq->length = reply;
bh->state = BUF_STATE_FULL;
- fsg->residue -= reply;
+ common->residue -= reply;
} /* Otherwise it's already set */
return 0;
@@ -2075,8 +2118,9 @@ unknown_cmnd:
static int received_cbw(struct fsg_dev *fsg, struct fsg_buffhd *bh)
{
- struct usb_request *req = bh->outreq;
+ struct usb_request *req = bh->outreq;
struct fsg_bulk_cb_wrap *cbw = req->buf;
+ struct fsg_common *common = fsg->common;
/* Was this a real packet? Should it be ignored? */
if (req->status || test_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags))
@@ -2113,7 +2157,7 @@ static int received_cbw(struct fsg_dev *fsg, struct fsg_buffhd *bh)
/* We can do anything we want here, so let's stall the
* bulk pipes if we are allowed to. */
- if (fsg->can_stall) {
+ if (common->can_stall) {
fsg_set_halt(fsg, fsg->bulk_out);
halt_bulk_in_endpoint(fsg);
}
@@ -2121,39 +2165,41 @@ static int received_cbw(struct fsg_dev *fsg, struct fsg_buffhd *bh)
}
/* Save the command for later */
- fsg->common->cmnd_size = cbw->Length;
- memcpy(fsg->common->cmnd, cbw->CDB, fsg->common->cmnd_size);
+ common->cmnd_size = cbw->Length;
+ memcpy(common->cmnd, cbw->CDB, common->cmnd_size);
if (cbw->Flags & USB_BULK_IN_FLAG)
- fsg->data_dir = DATA_DIR_TO_HOST;
+ common->data_dir = DATA_DIR_TO_HOST;
else
- fsg->data_dir = DATA_DIR_FROM_HOST;
- fsg->data_size = le32_to_cpu(cbw->DataTransferLength);
- if (fsg->data_size == 0)
- fsg->data_dir = DATA_DIR_NONE;
- fsg->common->lun = cbw->Lun;
- fsg->tag = cbw->Tag;
+ common->data_dir = DATA_DIR_FROM_HOST;
+ common->data_size = le32_to_cpu(cbw->DataTransferLength);
+ if (common->data_size == 0)
+ common->data_dir = DATA_DIR_NONE;
+ common->lun = cbw->Lun;
+ common->tag = cbw->Tag;
return 0;
}
-static int get_next_command(struct fsg_dev *fsg)
+static int get_next_command(struct fsg_common *common)
{
struct fsg_buffhd *bh;
int rc = 0;
/* Wait for the next buffer to become available */
- bh = fsg->common->next_buffhd_to_fill;
+ bh = common->next_buffhd_to_fill;
while (bh->state != BUF_STATE_EMPTY) {
- rc = sleep_thread(fsg);
+ rc = sleep_thread(common);
if (rc)
return rc;
}
/* Queue a request to read a Bulk-only CBW */
- set_bulk_out_req_length(fsg, bh, USB_BULK_CB_WRAP_LEN);
+ set_bulk_out_req_length(common, bh, USB_BULK_CB_WRAP_LEN);
bh->outreq->short_not_ok = 1;
- start_transfer(fsg, fsg->bulk_out, bh->outreq,
- &bh->outreq_busy, &bh->state);
+ START_TRANSFER_OR(common, bulk_out, bh->outreq,
+ &bh->outreq_busy, &bh->state)
+ /* Don't know what to do if common->fsg is NULL */
+ return -EIO;
/* We will drain the buffer in software, which means we
* can reuse it for the next filling. No need to advance
@@ -2161,12 +2207,12 @@ static int get_next_command(struct fsg_dev *fsg)
/* Wait for the CBW to arrive */
while (bh->state != BUF_STATE_FULL) {
- rc = sleep_thread(fsg);
+ rc = sleep_thread(common);
if (rc)
return rc;
}
smp_rmb();
- rc = received_cbw(fsg, bh);
+ rc = fsg_is_set(common) ? received_cbw(common->fsg, bh) : -EIO;
bh->state = BUF_STATE_EMPTY;
return rc;
@@ -2175,25 +2221,25 @@ static int get_next_command(struct fsg_dev *fsg)
/*-------------------------------------------------------------------------*/
-static int enable_endpoint(struct fsg_dev *fsg, struct usb_ep *ep,
+static int enable_endpoint(struct fsg_common *common, struct usb_ep *ep,
const struct usb_endpoint_descriptor *d)
{
int rc;
- ep->driver_data = fsg;
+ ep->driver_data = common;
rc = usb_ep_enable(ep, d);
if (rc)
- ERROR(fsg, "can't enable %s, result %d\n", ep->name, rc);
+ ERROR(common, "can't enable %s, result %d\n", ep->name, rc);
return rc;
}
-static int alloc_request(struct fsg_dev *fsg, struct usb_ep *ep,
+static int alloc_request(struct fsg_common *common, struct usb_ep *ep,
struct usb_request **preq)
{
*preq = usb_ep_alloc_request(ep, GFP_ATOMIC);
if (*preq)
return 0;
- ERROR(fsg, "can't allocate request for %s\n", ep->name);
+ ERROR(common, "can't allocate request for %s\n", ep->name);
return -ENOMEM;
}
@@ -2202,83 +2248,96 @@ static int alloc_request(struct fsg_dev *fsg, struct usb_ep *ep,
* Call with altsetting < 0 to disable the interface. The only other
* available altsetting is 0, which enables the interface.
*/
-static int do_set_interface(struct fsg_dev *fsg, int altsetting)
+static int do_set_interface(struct fsg_common *common, int altsetting)
{
int rc = 0;
int i;
const struct usb_endpoint_descriptor *d;
- if (fsg->running)
- DBG(fsg, "reset interface\n");
+ if (common->running)
+ DBG(common, "reset interface\n");
reset:
/* Deallocate the requests */
- for (i = 0; i < FSG_NUM_BUFFERS; ++i) {
- struct fsg_buffhd *bh = &fsg->common->buffhds[i];
+ if (common->prev_fsg) {
+ struct fsg_dev *fsg = common->prev_fsg;
- if (bh->inreq) {
- usb_ep_free_request(fsg->bulk_in, bh->inreq);
- bh->inreq = NULL;
+ for (i = 0; i < FSG_NUM_BUFFERS; ++i) {
+ struct fsg_buffhd *bh = &common->buffhds[i];
+
+ if (bh->inreq) {
+ usb_ep_free_request(fsg->bulk_in, bh->inreq);
+ bh->inreq = NULL;
+ }
+ if (bh->outreq) {
+ usb_ep_free_request(fsg->bulk_out, bh->outreq);
+ bh->outreq = NULL;
+ }
}
- if (bh->outreq) {
- usb_ep_free_request(fsg->bulk_out, bh->outreq);
- bh->outreq = NULL;
+
+ /* Disable the endpoints */
+ if (fsg->bulk_in_enabled) {
+ usb_ep_disable(fsg->bulk_in);
+ fsg->bulk_in_enabled = 0;
+ }
+ if (fsg->bulk_out_enabled) {
+ usb_ep_disable(fsg->bulk_out);
+ fsg->bulk_out_enabled = 0;
}
- }
- /* Disable the endpoints */
- if (fsg->bulk_in_enabled) {
- usb_ep_disable(fsg->bulk_in);
- fsg->bulk_in_enabled = 0;
- }
- if (fsg->bulk_out_enabled) {
- usb_ep_disable(fsg->bulk_out);
- fsg->bulk_out_enabled = 0;
+ common->prev_fsg = 0;
}
- fsg->running = 0;
+ common->running = 0;
if (altsetting < 0 || rc != 0)
return rc;
- DBG(fsg, "set interface %d\n", altsetting);
+ DBG(common, "set interface %d\n", altsetting);
- /* Enable the endpoints */
- d = fsg_ep_desc(fsg->gadget,
- &fsg_fs_bulk_in_desc, &fsg_hs_bulk_in_desc);
- rc = enable_endpoint(fsg, fsg->bulk_in, d);
- if (rc != 0)
- goto reset;
- fsg->bulk_in_enabled = 1;
+ if (fsg_is_set(common)) {
+ struct fsg_dev *fsg = common->fsg;
+ common->prev_fsg = common->fsg;
- d = fsg_ep_desc(fsg->gadget,
- &fsg_fs_bulk_out_desc, &fsg_hs_bulk_out_desc);
- rc = enable_endpoint(fsg, fsg->bulk_out, d);
- if (rc != 0)
- goto reset;
- fsg->bulk_out_enabled = 1;
- fsg->bulk_out_maxpacket = le16_to_cpu(d->wMaxPacketSize);
- clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags);
-
- /* Allocate the requests */
- for (i = 0; i < FSG_NUM_BUFFERS; ++i) {
- struct fsg_buffhd *bh = &fsg->common->buffhds[i];
-
- rc = alloc_request(fsg, fsg->bulk_in, &bh->inreq);
- if (rc != 0)
+ /* Enable the endpoints */
+ d = fsg_ep_desc(common->gadget,
+ &fsg_fs_bulk_in_desc, &fsg_hs_bulk_in_desc);
+ rc = enable_endpoint(common, fsg->bulk_in, d);
+ if (rc)
goto reset;
- rc = alloc_request(fsg, fsg->bulk_out, &bh->outreq);
- if (rc != 0)
+ fsg->bulk_in_enabled = 1;
+
+ d = fsg_ep_desc(common->gadget,
+ &fsg_fs_bulk_out_desc, &fsg_hs_bulk_out_desc);
+ rc = enable_endpoint(common, fsg->bulk_out, d);
+ if (rc)
goto reset;
- bh->inreq->buf = bh->outreq->buf = bh->buf;
- bh->inreq->context = bh->outreq->context = bh;
- bh->inreq->complete = bulk_in_complete;
- bh->outreq->complete = bulk_out_complete;
+ fsg->bulk_out_enabled = 1;
+ common->bulk_out_maxpacket = le16_to_cpu(d->wMaxPacketSize);
+ clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags);
+
+ /* Allocate the requests */
+ for (i = 0; i < FSG_NUM_BUFFERS; ++i) {
+ struct fsg_buffhd *bh = &common->buffhds[i];
+
+ rc = alloc_request(common, fsg->bulk_in, &bh->inreq);
+ if (rc)
+ goto reset;
+ rc = alloc_request(common, fsg->bulk_out, &bh->outreq);
+ if (rc)
+ goto reset;
+ bh->inreq->buf = bh->outreq->buf = bh->buf;
+ bh->inreq->context = bh->outreq->context = bh;
+ bh->inreq->complete = bulk_in_complete;
+ bh->outreq->complete = bulk_out_complete;
+ }
+
+ common->running = 1;
+ for (i = 0; i < common->nluns; ++i)
+ common->luns[i].unit_attention_data = SS_RESET_OCCURRED;
+ return rc;
+ } else {
+ return -EIO;
}
-
- fsg->running = 1;
- for (i = 0; i < fsg->common->nluns; ++i)
- fsg->common->luns[i].unit_attention_data = SS_RESET_OCCURRED;
- return rc;
}
@@ -2290,23 +2349,23 @@ reset:
* configurations might not work with our current power sources.
* For now we just assume the gadget is always self-powered.
*/
-static int do_set_config(struct fsg_dev *fsg, u8 new_config)
+static int do_set_config(struct fsg_common *common, u8 new_config)
{
int rc = 0;
/* Disable the single interface */
- if (fsg->config != 0) {
- DBG(fsg, "reset config\n");
- fsg->config = 0;
- rc = do_set_interface(fsg, -1);
+ if (common->config != 0) {
+ DBG(common, "reset config\n");
+ common->config = 0;
+ rc = do_set_interface(common, -1);
}
/* Enable the interface */
if (new_config != 0) {
- fsg->config = new_config;
- rc = do_set_interface(fsg, 0);
+ common->config = new_config;
+ rc = do_set_interface(common, 0);
if (rc != 0)
- fsg->config = 0; /* Reset on errors */
+ common->config = 0; /* Reset on errors */
}
return rc;
}
@@ -2318,22 +2377,26 @@ static int do_set_config(struct fsg_dev *fsg, u8 new_config)
static int fsg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
{
struct fsg_dev *fsg = fsg_from_func(f);
- fsg->new_config = 1;
- raise_exception(fsg, FSG_STATE_CONFIG_CHANGE);
+ fsg->common->prev_fsg = fsg->common->fsg;
+ fsg->common->fsg = fsg;
+ fsg->common->new_config = 1;
+ raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE);
return 0;
}
static void fsg_disable(struct usb_function *f)
{
struct fsg_dev *fsg = fsg_from_func(f);
- fsg->new_config = 0;
- raise_exception(fsg, FSG_STATE_CONFIG_CHANGE);
+ fsg->common->prev_fsg = fsg->common->fsg;
+ fsg->common->fsg = fsg;
+ fsg->common->new_config = 0;
+ raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE);
}
/*-------------------------------------------------------------------------*/
-static void handle_exception(struct fsg_dev *fsg)
+static void handle_exception(struct fsg_common *common)
{
siginfo_t info;
int sig;
@@ -2352,113 +2415,121 @@ static void handle_exception(struct fsg_dev *fsg)
if (!sig)
break;
if (sig != SIGUSR1) {
- if (fsg->state < FSG_STATE_EXIT)
- DBG(fsg, "Main thread exiting on signal\n");
- raise_exception(fsg, FSG_STATE_EXIT);
+ if (common->state < FSG_STATE_EXIT)
+ DBG(common, "Main thread exiting on signal\n");
+ raise_exception(common, FSG_STATE_EXIT);
}
}
/* Cancel all the pending transfers */
- for (i = 0; i < FSG_NUM_BUFFERS; ++i) {
- bh = &fsg->common->buffhds[i];
- if (bh->inreq_busy)
- usb_ep_dequeue(fsg->bulk_in, bh->inreq);
- if (bh->outreq_busy)
- usb_ep_dequeue(fsg->bulk_out, bh->outreq);
- }
-
- /* Wait until everything is idle */
- for (;;) {
- int num_active = 0;
+ if (fsg_is_set(common)) {
for (i = 0; i < FSG_NUM_BUFFERS; ++i) {
- bh = &fsg->common->buffhds[i];
- num_active += bh->inreq_busy + bh->outreq_busy;
+ bh = &common->buffhds[i];
+ if (bh->inreq_busy)
+ usb_ep_dequeue(common->fsg->bulk_in, bh->inreq);
+ if (bh->outreq_busy)
+ usb_ep_dequeue(common->fsg->bulk_out,
+ bh->outreq);
}
- if (num_active == 0)
- break;
- if (sleep_thread(fsg))
- return;
+
+ /* Wait until everything is idle */
+ for (;;) {
+ int num_active = 0;
+ for (i = 0; i < FSG_NUM_BUFFERS; ++i) {
+ bh = &common->buffhds[i];
+ num_active += bh->inreq_busy + bh->outreq_busy;
+ }
+ if (num_active == 0)
+ break;
+ if (sleep_thread(common))
+ return;
+ }
+
+ /* Clear out the controller's fifos */
+ if (common->fsg->bulk_in_enabled)
+ usb_ep_fifo_flush(common->fsg->bulk_in);
+ if (common->fsg->bulk_out_enabled)
+ usb_ep_fifo_flush(common->fsg->bulk_out);
}
- /* Clear out the controller's fifos */
- if (fsg->bulk_in_enabled)
- usb_ep_fifo_flush(fsg->bulk_in);
- if (fsg->bulk_out_enabled)
- usb_ep_fifo_flush(fsg->bulk_out);
-
/* Reset the I/O buffer states and pointers, the SCSI
* state, and the exception. Then invoke the handler. */
- spin_lock_irq(&fsg->lock);
+ spin_lock_irq(&common->lock);
for (i = 0; i < FSG_NUM_BUFFERS; ++i) {
- bh = &fsg->common->buffhds[i];
+ bh = &common->buffhds[i];
bh->state = BUF_STATE_EMPTY;
}
- fsg->common->next_buffhd_to_fill = &fsg->common->buffhds[0];
- fsg->common->next_buffhd_to_drain = &fsg->common->buffhds[0];
- exception_req_tag = fsg->exception_req_tag;
- new_config = fsg->new_config;
- old_state = fsg->state;
+ common->next_buffhd_to_fill = &common->buffhds[0];
+ common->next_buffhd_to_drain = &common->buffhds[0];
+ exception_req_tag = common->exception_req_tag;
+ new_config = common->new_config;
+ old_state = common->state;
if (old_state == FSG_STATE_ABORT_BULK_OUT)
- fsg->state = FSG_STATE_STATUS_PHASE;
+ common->state = FSG_STATE_STATUS_PHASE;
else {
- for (i = 0; i < fsg->common->nluns; ++i) {
- curlun = &fsg->common->luns[i];
+ for (i = 0; i < common->nluns; ++i) {
+ curlun = &common->luns[i];
curlun->prevent_medium_removal = 0;
curlun->sense_data = SS_NO_SENSE;
curlun->unit_attention_data = SS_NO_SENSE;
curlun->sense_data_info = 0;
curlun->info_valid = 0;
}
- fsg->state = FSG_STATE_IDLE;
+ common->state = FSG_STATE_IDLE;
}
- spin_unlock_irq(&fsg->lock);
+ spin_unlock_irq(&common->lock);
/* Carry out any extra actions required for the exception */
switch (old_state) {
case FSG_STATE_ABORT_BULK_OUT:
- send_status(fsg);
- spin_lock_irq(&fsg->lock);
- if (fsg->state == FSG_STATE_STATUS_PHASE)
- fsg->state = FSG_STATE_IDLE;
- spin_unlock_irq(&fsg->lock);
+ send_status(common);
+ spin_lock_irq(&common->lock);
+ if (common->state == FSG_STATE_STATUS_PHASE)
+ common->state = FSG_STATE_IDLE;
+ spin_unlock_irq(&common->lock);
break;
case FSG_STATE_RESET:
/* In case we were forced against our will to halt a
* bulk endpoint, clear the halt now. (The SuperH UDC
* requires this.) */
- if (test_and_clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags))
- usb_ep_clear_halt(fsg->bulk_in);
+ if (!fsg_is_set(common))
+ break;
+ if (test_and_clear_bit(IGNORE_BULK_OUT,
+ &common->fsg->atomic_bitflags))
+ usb_ep_clear_halt(common->fsg->bulk_in);
- if (fsg->ep0_req_tag == exception_req_tag)
- ep0_queue(fsg); /* Complete the status stage */
+ if (common->ep0_req_tag == exception_req_tag)
+ ep0_queue(common); /* Complete the status stage */
/* Technically this should go here, but it would only be
* a waste of time. Ditto for the INTERFACE_CHANGE and
* CONFIG_CHANGE cases. */
- /* for (i = 0; i < fsg->common->nluns; ++i) */
- /* fsg->common->luns[i].unit_attention_data = */
+ /* for (i = 0; i < common->nluns; ++i) */
+ /* common->luns[i].unit_attention_data = */
/* SS_RESET_OCCURRED; */
break;
case FSG_STATE_CONFIG_CHANGE:
- rc = do_set_config(fsg, new_config);
- if (fsg->ep0_req_tag != exception_req_tag)
+ rc = do_set_config(common, new_config);
+ if (common->ep0_req_tag != exception_req_tag)
break;
- if (rc != 0) /* STALL on errors */
- fsg_set_halt(fsg, fsg->ep0);
- else /* Complete the status stage */
- ep0_queue(fsg);
+ if (rc != 0) { /* STALL on errors */
+ DBG(common, "ep0 set halt\n");
+ usb_ep_set_halt(common->ep0);
+ } else { /* Complete the status stage */
+ ep0_queue(common);
+ }
break;
case FSG_STATE_EXIT:
case FSG_STATE_TERMINATED:
- do_set_config(fsg, 0); /* Free resources */
- spin_lock_irq(&fsg->lock);
- fsg->state = FSG_STATE_TERMINATED; /* Stop the thread */
- spin_unlock_irq(&fsg->lock);
+ do_set_config(common, 0); /* Free resources */
+ spin_lock_irq(&common->lock);
+ common->state = FSG_STATE_TERMINATED; /* Stop the thread */
+ spin_unlock_irq(&common->lock);
break;
case FSG_STATE_INTERFACE_CHANGE:
@@ -2474,9 +2545,9 @@ static void handle_exception(struct fsg_dev *fsg)
/*-------------------------------------------------------------------------*/
-static int fsg_main_thread(void *fsg_)
+static int fsg_main_thread(void *common_)
{
- struct fsg_dev *fsg = fsg_;
+ struct fsg_common *common = common_;
/* Allow the thread to be killed by a signal, but set the signal mask
* to block everything but INT, TERM, KILL, and USR1. */
@@ -2494,45 +2565,45 @@ static int fsg_main_thread(void *fsg_)
set_fs(get_ds());
/* The main loop */
- while (fsg->state != FSG_STATE_TERMINATED) {
- if (exception_in_progress(fsg) || signal_pending(current)) {
- handle_exception(fsg);
+ while (common->state != FSG_STATE_TERMINATED) {
+ if (exception_in_progress(common) || signal_pending(current)) {
+ handle_exception(common);
continue;
}
- if (!fsg->running) {
- sleep_thread(fsg);
+ if (!common->running) {
+ sleep_thread(common);
continue;
}
- if (get_next_command(fsg))
+ if (get_next_command(common))
continue;
- spin_lock_irq(&fsg->lock);
- if (!exception_in_progress(fsg))
- fsg->state = FSG_STATE_DATA_PHASE;
- spin_unlock_irq(&fsg->lock);
+ spin_lock_irq(&common->lock);
+ if (!exception_in_progress(common))
+ common->state = FSG_STATE_DATA_PHASE;
+ spin_unlock_irq(&common->lock);
- if (do_scsi_command(fsg) || finish_reply(fsg))
+ if (do_scsi_command(common) || finish_reply(common))
continue;
- spin_lock_irq(&fsg->lock);
- if (!exception_in_progress(fsg))
- fsg->state = FSG_STATE_STATUS_PHASE;
- spin_unlock_irq(&fsg->lock);
+ spin_lock_irq(&common->lock);
+ if (!exception_in_progress(common))
+ common->state = FSG_STATE_STATUS_PHASE;
+ spin_unlock_irq(&common->lock);
- if (send_status(fsg))
+ if (send_status(common))
continue;
- spin_lock_irq(&fsg->lock);
- if (!exception_in_progress(fsg))
- fsg->state = FSG_STATE_IDLE;
- spin_unlock_irq(&fsg->lock);
+ spin_lock_irq(&common->lock);
+ if (!exception_in_progress(common))
+ common->state = FSG_STATE_IDLE;
+ spin_unlock_irq(&common->lock);
}
- spin_lock_irq(&fsg->lock);
- fsg->thread_task = NULL;
- spin_unlock_irq(&fsg->lock);
+ spin_lock_irq(&common->lock);
+ common->thread_task = NULL;
+ spin_unlock_irq(&common->lock);
/* XXX */
/* If we are exiting because of a signal, unregister the
@@ -2541,7 +2612,7 @@ static int fsg_main_thread(void *fsg_)
/* usb_gadget_unregister_driver(&fsg_driver); */
/* Let the unbind and cleanup routines know the thread has exited */
- complete_and_exit(&fsg->thread_notifier, 0);
+ complete_and_exit(&common->thread_notifier, 0);
}
@@ -2600,7 +2671,21 @@ static struct fsg_common *fsg_common_init(struct fsg_common *common,
memset(common, 0, sizeof common);
common->free_storage_on_release = 0;
}
+
common->gadget = gadget;
+ common->ep0 = gadget->ep0;
+ common->ep0req = cdev->req;
+
+ /* Maybe allocate device-global string IDs, and patch descriptors */
+ if (fsg_strings[FSG_STRING_INTERFACE].id == 0) {
+ rc = usb_string_id(cdev);
+ if (rc < 0) {
+ kfree(common);
+ return ERR_PTR(rc);
+ }
+ fsg_strings[FSG_STRING_INTERFACE].id = rc;
+ fsg_intf_desc.iInterface = rc;
+ }
/* Create the LUNs, open their backing files, and register the
* LUN devices in sysfs. */
@@ -2697,11 +2782,23 @@ static struct fsg_common *fsg_common_init(struct fsg_common *common,
* disable stalls.
*/
common->can_stall = cfg->can_stall &&
- !(gadget_is_sh(fsg->gadget) || gadget_is_at91(fsg->gadget));
+ !(gadget_is_sh(common->gadget) ||
+ gadget_is_at91(common->gadget));
- common->thread_name = OR(cfg->thread_name, "file-storage");
+ spin_lock_init(&common->lock);
kref_init(&common->ref);
+
+
+ /* Tell the thread to start working */
+ common->thread_task =
+ kthread_create(fsg_main_thread, common,
+ OR(cfg->thread_name, "file-storage"));
+ if (IS_ERR(common->thread_task)) {
+ rc = PTR_ERR(common->thread_task);
+ goto error_release;
+ }
+ init_completion(&common->thread_notifier);
#undef OR
@@ -2731,15 +2828,21 @@ static struct fsg_common *fsg_common_init(struct fsg_common *common,
}
kfree(pathbuf);
+ DBG(common, "I/O thread pid: %d\n", task_pid_nr(common->thread_task));
+
+ wake_up_process(common->thread_task);
+
return common;
error_luns:
common->nluns = i + 1;
error_release:
+ common->state = FSG_STATE_TERMINATED; /* The thread is dead */
/* Call fsg_common_release() directly, ref might be not
* initialised */
fsg_common_release(&common->ref);
+ complete(&common->thread_notifier);
return ERR_PTR(rc);
}
@@ -2751,6 +2854,15 @@ static void fsg_common_release(struct kref *ref)
unsigned i = common->nluns;
struct fsg_lun *lun = common->luns;
+ /* If the thread isn't already dead, tell it to exit now */
+ if (common->state != FSG_STATE_TERMINATED) {
+ raise_exception(common, FSG_STATE_EXIT);
+ wait_for_completion(&common->thread_notifier);
+
+ /* The cleanup routine waits for this completion also */
+ complete(&common->thread_notifier);
+ }
+
/* Beware tempting for -> do-while optimization: when in error
* recovery nluns may be zero. */
@@ -2775,17 +2887,6 @@ static void fsg_unbind(struct usb_configuration *c, struct usb_function *f)
struct fsg_dev *fsg = fsg_from_func(f);
DBG(fsg, "unbind\n");
- clear_bit(REGISTERED, &fsg->atomic_bitflags);
-
- /* If the thread isn't already dead, tell it to exit now */
- if (fsg->state != FSG_STATE_TERMINATED) {
- raise_exception(fsg, FSG_STATE_EXIT);
- wait_for_completion(&fsg->thread_notifier);
-
- /* The cleanup routine waits for this completion also */
- complete(&fsg->thread_notifier);
- }
-
fsg_common_put(fsg->common);
kfree(fsg);
}
@@ -2800,8 +2901,6 @@ static int fsg_bind(struct usb_configuration *c, struct usb_function *f)
struct usb_ep *ep;
fsg->gadget = gadget;
- fsg->ep0 = gadget->ep0;
- fsg->ep0req = c->cdev->req;
/* New interface */
i = usb_interface_id(c, f);
@@ -2814,13 +2913,13 @@ static int fsg_bind(struct usb_configuration *c, struct usb_function *f)
ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_in_desc);
if (!ep)
goto autoconf_fail;
- ep->driver_data = fsg; /* claim the endpoint */
+ ep->driver_data = fsg->common; /* claim the endpoint */
fsg->bulk_in = ep;
ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_out_desc);
if (!ep)
goto autoconf_fail;
- ep->driver_data = fsg; /* claim the endpoint */
+ ep->driver_data = fsg->common; /* claim the endpoint */
fsg->bulk_out = ep;
if (gadget_is_dualspeed(gadget)) {
@@ -2832,40 +2931,12 @@ static int fsg_bind(struct usb_configuration *c, struct usb_function *f)
f->hs_descriptors = fsg_hs_function;
}
-
- /* maybe allocate device-global string IDs, and patch descriptors */
- if (fsg_strings[FSG_STRING_INTERFACE].id == 0) {
- i = usb_string_id(c->cdev);
- if (i < 0)
- return i;
- fsg_strings[FSG_STRING_INTERFACE].id = i;
- fsg_intf_desc.iInterface = i;
- }
-
-
- fsg->thread_task = kthread_create(fsg_main_thread, fsg,
- fsg->common->thread_name);
- if (IS_ERR(fsg->thread_task)) {
- rc = PTR_ERR(fsg->thread_task);
- goto out;
- }
-
- DBG(fsg, "I/O thread pid: %d\n", task_pid_nr(fsg->thread_task));
-
- set_bit(REGISTERED, &fsg->atomic_bitflags);
-
- /* Tell the thread to start working */
- wake_up_process(fsg->thread_task);
return 0;
autoconf_fail:
ERROR(fsg, "unable to autoconfigure all endpoints\n");
rc = -ENOTSUPP;
-
-out:
- fsg->state = FSG_STATE_TERMINATED; /* The thread is dead */
fsg_unbind(c, f);
- complete(&fsg->thread_notifier);
return rc;
}
@@ -2888,10 +2959,6 @@ static int fsg_add(struct usb_composite_dev *cdev,
if (unlikely(!fsg))
return -ENOMEM;
- spin_lock_init(&fsg->lock);
- init_completion(&fsg->thread_notifier);
-
- fsg->cdev = cdev;
fsg->function.name = FSG_DRIVER_DESC;
fsg->function.strings = fsg_strings_array;
fsg->function.descriptors = fsg_fs_function;
@@ -2907,7 +2974,6 @@ static int fsg_add(struct usb_composite_dev *cdev,
* from this function. So instead of incrementing counter now
* and decrement in error recovery we increment it only when
* call to usb_add_function() was successful. */
- fsg->can_stall = common->can_stall;
rc = usb_add_function(c, &fsg->function);
--
1.6.3.3
--
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