if ((length == 0) || (bytes_per_datum == 0))
return -EINVAL;
__iio_update_ring_buffer(&ring->buf, bytes_per_datum, length);
- ring->data = kmalloc(length*ring->buf.bpd, GFP_ATOMIC);
+ ring->data = kmalloc(length*ring->buf.bytes_per_datum, GFP_ATOMIC);
ring->read_p = NULL;
ring->write_p = NULL;
ring->last_written_p = NULL;
* as long as the read pointer is valid before this
* passes it - guaranteed as set later in this function.
*/
- ring->half_p = ring->data - ring->buf.length*ring->buf.bpd/2;
+ ring->half_p = ring->data - ring->buf.length*ring->buf.bytes_per_datum/2;
}
/* Copy data to where ever the current write pointer says */
- memcpy(ring->write_p, data, ring->buf.bpd);
+ memcpy(ring->write_p, data, ring->buf.bytes_per_datum);
barrier();
/* Update the pointer used to get most recent value.
* Always valid as either points to latest or second latest value.
/* temp_ptr used to ensure we never have an invalid pointer
* it may be slightly lagging, but never invalid
*/
- temp_ptr = ring->write_p + ring->buf.bpd;
+ temp_ptr = ring->write_p + ring->buf.bytes_per_datum;
/* End of ring, back to the beginning */
- if (temp_ptr == ring->data + ring->buf.length*ring->buf.bpd)
+ if (temp_ptr == ring->data + ring->buf.length*ring->buf.bytes_per_datum)
temp_ptr = ring->data;
/* Update the write pointer
* always valid as long as this is the only function able to write.
*/
else if (ring->write_p == ring->read_p) {
change_test_ptr = ring->read_p;
- temp_ptr = change_test_ptr + ring->buf.bpd;
+ temp_ptr = change_test_ptr + ring->buf.bytes_per_datum;
if (temp_ptr
- == ring->data + ring->buf.length*ring->buf.bpd) {
+ == ring->data + ring->buf.length*ring->buf.bytes_per_datum) {
temp_ptr = ring->data;
}
/* We are moving pointer on one because the ring is full. Any
/* There are definite 'issues' with this and chances of
* simultaneous read */
/* Also need to use loop count to ensure this only happens once */
- ring->half_p += ring->buf.bpd;
- if (ring->half_p == ring->data + ring->buf.length*ring->buf.bpd)
+ ring->half_p += ring->buf.bytes_per_datum;
+ if (ring->half_p == ring->data + ring->buf.length*ring->buf.bytes_per_datum)
ring->half_p = ring->data;
if (ring->half_p == ring->read_p) {
spin_lock(&ring->buf.shared_ev_pointer.lock);
* read something that is not a whole number of bpds.
* Return an error.
*/
- if (count % ring->buf.bpd) {
+ if (count % ring->buf.bytes_per_datum) {
ret = -EINVAL;
printk(KERN_INFO "Ring buffer read request not whole number of"
- "samples: Request bytes %zd, Current bpd %d\n",
- count, ring->buf.bpd);
+ "samples: Request bytes %zd, Current bytes per datum %d\n",
+ count, ring->buf.bytes_per_datum);
goto error_ret;
}
/* Limit size to whole of ring buffer */
- bytes_to_rip = min((size_t)(ring->buf.bpd*ring->buf.length), count);
+ bytes_to_rip = min((size_t)(ring->buf.bytes_per_datum*ring->buf.length), count);
*data = kmalloc(bytes_to_rip, GFP_KERNEL);
if (*data == NULL) {
} else {
/* going through 'end' of ring buffer */
max_copied = ring->data
- + ring->buf.length*ring->buf.bpd - initial_read_p;
+ + ring->buf.length*ring->buf.bytes_per_datum - initial_read_p;
memcpy(*data, initial_read_p, max_copied);
/* possible we are done if we align precisely with end */
if (max_copied == bytes_to_rip)
if (initial_read_p <= current_read_p)
*dead_offset = current_read_p - initial_read_p;
else
- *dead_offset = ring->buf.length*ring->buf.bpd
+ *dead_offset = ring->buf.length*ring->buf.bytes_per_datum
- (initial_read_p - current_read_p);
/* possible issue if the initial write has been lapped or indeed
/* Check there is anything here */
if (last_written_p_copy == NULL)
return -EAGAIN;
- memcpy(data, last_written_p_copy, ring->buf.bpd);
+ memcpy(data, last_written_p_copy, ring->buf.bytes_per_datum);
if (unlikely(ring->last_written_p != last_written_p_copy))
goto again;
goto error_ret;
}
__iio_free_sw_ring_buffer(ring);
- ret = __iio_allocate_sw_ring_buffer(ring, ring->buf.bpd,
+ ret = __iio_allocate_sw_ring_buffer(ring, ring->buf.bytes_per_datum,
ring->buf.length);
error_ret:
spin_unlock(&ring->use_lock);
}
EXPORT_SYMBOL(iio_request_update_sw_rb);
-int iio_get_bpd_sw_rb(struct iio_ring_buffer *r)
+int iio_get_bytes_per_datum_sw_rb(struct iio_ring_buffer *r)
{
struct iio_sw_ring_buffer *ring = iio_to_sw_ring(r);
- return ring->buf.bpd;
+ return ring->buf.bytes_per_datum;
}
-EXPORT_SYMBOL(iio_get_bpd_sw_rb);
+EXPORT_SYMBOL(iio_get_bytes_per_datum_sw_rb);
-int iio_set_bpd_sw_rb(struct iio_ring_buffer *r, size_t bpd)
+int iio_set_bytes_per_datum_sw_rb(struct iio_ring_buffer *r, size_t bpd)
{
- if (r->bpd != bpd) {
- r->bpd = bpd;
+ if (r->bytes_per_datum != bpd) {
+ r->bytes_per_datum = bpd;
if (r->access.mark_param_change)
r->access.mark_param_change(r);
}
return 0;
}
-EXPORT_SYMBOL(iio_set_bpd_sw_rb);
+EXPORT_SYMBOL(iio_set_bytes_per_datum_sw_rb);
int iio_get_length_sw_rb(struct iio_ring_buffer *r)
{
}
static IIO_RING_ENABLE_ATTR;
-static IIO_RING_BPS_ATTR;
+static IIO_RING_BYTES_PER_DATUM_ATTR;
static IIO_RING_LENGTH_ATTR;
/* Standard set of ring buffer attributes */
static struct attribute *iio_ring_attributes[] = {
&dev_attr_length.attr,
- &dev_attr_bps.attr,
- &dev_attr_ring_enable.attr,
+ &dev_attr_bytes_per_datum.attr,
+ &dev_attr_enable.attr,
NULL,
};
int iio_sw_ring_preenable(struct iio_dev *indio_dev)
{
+ struct iio_ring_buffer *ring = indio_dev->ring;
size_t size;
dev_dbg(&indio_dev->dev, "%s\n", __func__);
/* Check if there are any scan elements enabled, if not fail*/
- if (!(indio_dev->scan_count || indio_dev->scan_timestamp))
+ if (!(ring->scan_count || ring->scan_timestamp))
return -EINVAL;
- if (indio_dev->scan_timestamp)
- if (indio_dev->scan_count)
+ if (ring->scan_timestamp)
+ if (ring->scan_count)
/* Timestamp (aligned to s64) and data */
- size = (((indio_dev->scan_count * indio_dev->ring->bpe)
+ size = (((ring->scan_count * ring->bpe)
+ sizeof(s64) - 1)
& ~(sizeof(s64) - 1))
+ sizeof(s64);
else /* Timestamp only */
size = sizeof(s64);
else /* Data only */
- size = indio_dev->scan_count * indio_dev->ring->bpe;
- indio_dev->ring->access.set_bpd(indio_dev->ring, size);
+ size = ring->scan_count * ring->bpe;
+ ring->access.set_bytes_per_datum(ring, size);
return 0;
}
struct iio_sw_ring_helper_state *st
= container_of(work_s, struct iio_sw_ring_helper_state,
work_trigger_to_ring);
+ struct iio_ring_buffer *ring = st->indio_dev->ring;
int len = 0;
- size_t datasize = st->indio_dev
- ->ring->access.get_bpd(st->indio_dev->ring);
+ size_t datasize = ring->access.get_bytes_per_datum(ring);
char *data = kmalloc(datasize, GFP_KERNEL);
if (data == NULL) {
return;
}
- if (st->indio_dev->scan_count)
+ if (ring->scan_count)
len = st->get_ring_element(st, data);
/* Guaranteed to be aligned with 8 byte boundary */
- if (st->indio_dev->scan_timestamp)
+ if (ring->scan_timestamp)
*(s64 *)(((phys_addr_t)data + len
+ sizeof(s64) - 1) & ~(sizeof(s64) - 1))
= st->last_timestamp;
- st->indio_dev->ring->access.store_to(st->indio_dev->ring,
- (u8 *)data,
+ ring->access.store_to(ring,
+ (u8 *)data,
st->last_timestamp);
iio_trigger_notify_done(st->indio_dev->trig);
git.openpandora.org / pandora-kernel.git / blobdiff