#include "transport.h"
/* Host functions */
-//----- host_info() ---------------------
-static const char* host_info(struct Scsi_Host *host)
+/*
+ * host_info()
+ */
+static const char *host_info(struct Scsi_Host *host)
{
/* pr_info("scsiglue --- host_info\n"); */
return "SCSI emulation for USB Mass Storage devices";
}
-//----- slave_alloc() ---------------------
+/*
+ * slave_alloc()
+ */
static int slave_alloc(struct scsi_device *sdev)
{
struct us_data *us = host_to_us(sdev->host);
return 0;
}
-//----- slave_configure() ---------------------
+/*
+ * slave_configure()
+ */
static int slave_configure(struct scsi_device *sdev)
{
struct us_data *us = host_to_us(sdev->host);
/* pr_info("scsiglue --- slave_configure\n"); */
- if (us->fflags & (US_FL_MAX_SECTORS_64 | US_FL_MAX_SECTORS_MIN))
- {
+ if (us->fflags & (US_FL_MAX_SECTORS_64 | US_FL_MAX_SECTORS_MIN)) {
unsigned int max_sectors = 64;
if (us->fflags & US_FL_MAX_SECTORS_MIN)
max_sectors);
}
- if (sdev->type == TYPE_DISK)
- {
- if (us->subclass != USB_SC_SCSI && us->subclass != USB_SC_CYP_ATACB)
+ if (sdev->type == TYPE_DISK) {
+ if (us->subclass != USB_SC_SCSI &&
+ us->subclass != USB_SC_CYP_ATACB)
sdev->use_10_for_ms = 1;
sdev->use_192_bytes_for_3f = 1;
if (us->fflags & US_FL_NO_WP_DETECT)
sdev->retry_hwerror = 1;
sdev->allow_restart = 1;
sdev->last_sector_bug = 1;
- }
- else
- {
+ } else {
sdev->use_10_for_ms = 1;
}
- if ((us->protocol == USB_PR_CB || us->protocol == USB_PR_CBI) && sdev->scsi_level == SCSI_UNKNOWN)
+ if ((us->protocol == USB_PR_CB || us->protocol == USB_PR_CBI) &&
+ sdev->scsi_level == SCSI_UNKNOWN)
us->max_lun = 0;
if (us->fflags & US_FL_NOT_LOCKABLE)
}
/* This is always called with scsi_lock(host) held */
-//----- queuecommand() ---------------------
-static int queuecommand_lck(struct scsi_cmnd *srb, void (*done)(struct scsi_cmnd *))
+/*
+ * queuecommand()
+ */
+static int queuecommand_lck(struct scsi_cmnd *srb,
+ void (*done)(struct scsi_cmnd *))
{
struct us_data *us = host_to_us(srb->device->host);
/* pr_info("scsiglue --- queuecommand\n"); */
/* check for state-transition errors */
- if (us->srb != NULL)
- {
+ if (us->srb != NULL) {
/* pr_info("Error in %s: us->srb = %p\n"
__FUNCTION__, us->srb); */
return SCSI_MLQUEUE_HOST_BUSY;
}
/* fail the command if we are disconnecting */
- if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags))
- {
+ if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) {
pr_info("Fail command during disconnect\n");
srb->result = DID_NO_CONNECT << 16;
done(srb);
***********************************************************************/
/* Command timeout and abort */
-//----- command_abort() ---------------------
+/*
+ * command_abort()
+ */
static int command_abort(struct scsi_cmnd *srb)
{
struct us_data *us = host_to_us(srb->device->host);
/* pr_info("scsiglue --- command_abort\n"); */
scsi_lock(us_to_host(us));
- if (us->srb != srb)
- {
+ if (us->srb != srb) {
scsi_unlock(us_to_host(us));
printk ("-- nothing to abort\n");
return FAILED;
}
set_bit(US_FLIDX_TIMED_OUT, &us->dflags);
- if (!test_bit(US_FLIDX_RESETTING, &us->dflags))
- {
+ if (!test_bit(US_FLIDX_RESETTING, &us->dflags)) {
set_bit(US_FLIDX_ABORTING, &us->dflags);
usb_stor_stop_transport(us);
}
return SUCCESS;
}
-/* This invokes the transport reset mechanism to reset the state of the device */
-//----- device_reset() ---------------------
+/* This invokes the transport reset mechanism to reset the state of the
+ * device.
+ */
+/*
+ * device_reset()
+ */
static int device_reset(struct scsi_cmnd *srb)
{
struct us_data *us = host_to_us(srb->device->host);
return result < 0 ? FAILED : SUCCESS;
}
-//----- bus_reset() ---------------------
+/*
+ * bus_reset()
+ */
static int bus_reset(struct scsi_cmnd *srb)
{
struct us_data *us = host_to_us(srb->device->host);
return result < 0 ? FAILED : SUCCESS;
}
-//----- usb_stor_report_device_reset() ---------------------
+/*
+ * usb_stor_report_device_reset()
+ */
void usb_stor_report_device_reset(struct us_data *us)
{
int i;
/* pr_info("scsiglue --- usb_stor_report_device_reset\n"); */
scsi_report_device_reset(host, 0, 0);
- if (us->fflags & US_FL_SCM_MULT_TARG)
- {
+ if (us->fflags & US_FL_SCM_MULT_TARG) {
for (i = 1; i < host->max_id; ++i)
scsi_report_device_reset(host, 0, i);
}
}
-//----- usb_stor_report_bus_reset() ---------------------
+/*
+ * usb_stor_report_bus_reset()
+ */
void usb_stor_report_bus_reset(struct us_data *us)
{
struct Scsi_Host *host = us_to_host(us);
#define SPRINTF(args...) \
do { if (pos < buffer+length) pos += sprintf(pos, ## args); } while (0)
-//----- proc_info() ---------------------
-static int proc_info (struct Scsi_Host *host, char *buffer, char **start, off_t offset, int length, int inout)
+/*
+ * proc_info()
+ */
+static int proc_info(struct Scsi_Host *host, char *buffer, char **start,
+ off_t offset, int length, int inout)
{
struct us_data *us = host_to_us(host);
char *pos = buffer;
SPRINTF(" Transport: %s\n", us->transport_name);
/* show the device flags */
- if (pos < buffer + length)
- {
+ if (pos < buffer + length) {
pos += sprintf(pos, " Quirks:");
#define US_FLAG(name, value) \
*start = buffer + offset;
if ((pos - buffer) < offset)
- return (0);
+ return 0;
else if ((pos - buffer - offset) < length)
- return (pos - buffer - offset);
+ return pos - buffer - offset;
else
- return (length);
+ return length;
}
/***********************************************************************
***********************************************************************/
/* Output routine for the sysfs max_sectors file */
-//----- show_max_sectors() ---------------------
-static ssize_t show_max_sectors(struct device *dev, struct device_attribute *attr, char *buf)
+/*
+ * show_max_sectors()
+ */
+static ssize_t show_max_sectors(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
struct scsi_device *sdev = to_scsi_device(dev);
}
/* Input routine for the sysfs max_sectors file */
-//----- store_max_sectors() ---------------------
-static ssize_t store_max_sectors(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+/*
+ * store_max_sectors()
+ */
+static ssize_t store_max_sectors(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
{
struct scsi_device *sdev = to_scsi_device(dev);
unsigned short ms;
/* pr_info("scsiglue --- ssize_t store_max_sectors\n"); */
- if (sscanf(buf, "%hu", &ms) > 0 && ms <= SCSI_DEFAULT_MAX_SECTORS)
- {
+ if (sscanf(buf, "%hu", &ms) > 0 && ms <= SCSI_DEFAULT_MAX_SECTORS) {
blk_queue_max_hw_sectors(sdev->request_queue, ms);
return strlen(buf);
}
- return -EINVAL;
+ return -EINVAL;
}
static DEVICE_ATTR(max_sectors, S_IRUGO | S_IWUSR, show_max_sectors, store_max_sectors);
/* this defines our host template, with which we'll allocate hosts */
-//----- usb_stor_host_template() ---------------------
+/*
+ * usb_stor_host_template()
+ */
struct scsi_host_template usb_stor_host_template = {
/* basic userland interface stuff */
.name = "eucr-storage",
* Scatter-gather transfer buffer access routines
***********************************************************************/
-//----- usb_stor_access_xfer_buf() ---------------------
+/*
+ * usb_stor_access_xfer_buf()
+ */
unsigned int usb_stor_access_xfer_buf(struct us_data *us, unsigned char *buffer,
unsigned int buflen, struct scsi_cmnd *srb, struct scatterlist **sgptr,
unsigned int *offset, enum xfer_buf_dir dir)
sg = scsi_sglist(srb);
cnt = 0;
- while (cnt < buflen && sg)
- {
- struct page *page = sg_page(sg) + ((sg->offset + *offset) >> PAGE_SHIFT);
+ while (cnt < buflen && sg) {
+ struct page *page = sg_page(sg) +
+ ((sg->offset + *offset) >> PAGE_SHIFT);
unsigned int poff = (sg->offset + *offset) & (PAGE_SIZE-1);
unsigned int sglen = sg->length - *offset;
- if (sglen > buflen - cnt)
- {
+ if (sglen > buflen - cnt) {
/* Transfer ends within this s-g entry */
sglen = buflen - cnt;
*offset += sglen;
- }
- else
- {
+ } else {
/* Transfer continues to next s-g entry */
*offset = 0;
sg = sg_next(sg);
}
- while (sglen > 0)
- {
- unsigned int plen = min(sglen, (unsigned int)PAGE_SIZE - poff);
+ while (sglen > 0) {
+ unsigned int plen = min(sglen,
+ (unsigned int)PAGE_SIZE - poff);
unsigned char *ptr = kmap(page);
if (dir == TO_XFER_BUF)
return cnt;
}
-/* Store the contents of buffer into srb's transfer buffer and set the SCSI residue. */
-//----- usb_stor_set_xfer_buf() ---------------------
-void usb_stor_set_xfer_buf(struct us_data *us, unsigned char *buffer, unsigned int buflen, struct scsi_cmnd *srb,
- unsigned int dir)
+/*
+ * Store the contents of buffer into srb's transfer
+ * buffer and set the SCSI residue.
+ */
+/*
+ * usb_stor_set_xfer_buf()
+ */
+void usb_stor_set_xfer_buf(struct us_data *us, unsigned char *buffer,
+ unsigned int buflen, struct scsi_cmnd *srb, unsigned int dir)
{
unsigned int offset = 0;
struct scatterlist *sg = NULL;
/* pr_info("transport --- usb_stor_set_xfer_buf\n"); */
- // TO_XFER_BUF = 0, FROM_XFER_BUF = 1
+ /* TO_XFER_BUF = 0, FROM_XFER_BUF = 1 */
buflen = min(buflen, scsi_bufflen(srb));
- buflen = usb_stor_access_xfer_buf(us, buffer, buflen, srb, &sg, &offset, dir);
+ buflen = usb_stor_access_xfer_buf(us, buffer, buflen, srb,
+ &sg, &offset, dir);
if (buflen < scsi_bufflen(srb))
scsi_set_resid(srb, scsi_bufflen(srb) - buflen);
}
projects / linux-beck.git / commitdiff