From: Jonathan Cameron <jic23@xxxxxxxxx>
Crucial step in allowing multiple interfaces.
Main stages:
1) Ensure no trigger_handler touches the buffers directly.
They should only care about active_scan_mask and scan_timestamp
in indio_dev.
2) Ensure all setup ops for the buffers act on the general mode
and the individual buffers in a consistent fashion.
3) Make use of iio_sw_buffer_preenable where possibe. It's never
in a particular fast path so even if overcomplex it is worth
using to cut down on code duplication.
Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxxx>
---
drivers/staging/iio/accel/adis16201_ring.c | 9 +-
drivers/staging/iio/accel/adis16203_ring.c | 11 +-
drivers/staging/iio/accel/adis16204_ring.c | 8 +-
drivers/staging/iio/accel/adis16209_ring.c | 9 +-
drivers/staging/iio/accel/adis16240_ring.c | 9 +-
drivers/staging/iio/accel/lis3l02dq_ring.c | 9 +-
drivers/staging/iio/adc/ad7192.c | 27 +-
drivers/staging/iio/adc/ad7298.h | 1 -
drivers/staging/iio/adc/ad7298_ring.c | 31 +-
drivers/staging/iio/adc/ad7476.h | 1 -
drivers/staging/iio/adc/ad7476_ring.c | 40 +-
drivers/staging/iio/adc/ad7606_ring.c | 11 +-
drivers/staging/iio/adc/ad7793.c | 26 +-
drivers/staging/iio/adc/ad7887.h | 1 -
drivers/staging/iio/adc/ad7887_ring.c | 28 +-
drivers/staging/iio/adc/ad799x.h | 1 -
drivers/staging/iio/adc/ad799x_ring.c | 27 +-
drivers/staging/iio/adc/max1363_ring.c | 6 +-
drivers/staging/iio/buffer.h | 24 +-
drivers/staging/iio/gyro/adis16260_ring.c | 8 +-
drivers/staging/iio/iio.h | 8 +
drivers/staging/iio/iio_simple_dummy_buffer.c | 16 +-
drivers/staging/iio/impedance-analyzer/ad5933.c | 14 +-
drivers/staging/iio/imu/adis16400_ring.c | 6 +-
drivers/staging/iio/industrialio-buffer.c | 553 ++++++++++++++---------
drivers/staging/iio/industrialio-core.c | 1 +
drivers/staging/iio/meter/ade7758_ring.c | 25 +-
27 files changed, 455 insertions(+), 455 deletions(-)
diff --git a/drivers/staging/iio/accel/adis16201_ring.c b/drivers/staging/iio/accel/adis16201_ring.c
index 97f9e6b..f3673c2 100644
--- a/drivers/staging/iio/accel/adis16201_ring.c
+++ b/drivers/staging/iio/accel/adis16201_ring.c
@@ -62,13 +62,10 @@ static irqreturn_t adis16201_trigger_handler(int irq, void *p)
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
struct adis16201_state *st = iio_priv(indio_dev);
- struct iio_buffer *ring = indio_dev->buffer;
-
int i = 0;
s16 *data;
- size_t datasize = ring->access->get_bytes_per_datum(ring);
- data = kmalloc(datasize, GFP_KERNEL);
+ data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
if (data == NULL) {
dev_err(&st->us->dev, "memory alloc failed in ring bh");
return -ENOMEM;
@@ -81,10 +78,10 @@ static irqreturn_t adis16201_trigger_handler(int irq, void *p)
data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2]));
/* Guaranteed to be aligned with 8 byte boundary */
- if (ring->scan_timestamp)
+ if (indio_dev->scan_timestamp)
*((s64 *)(data + ((i + 3)/4)*4)) = pf->timestamp;
- ring->access->store_to(ring, (u8 *)data, pf->timestamp);
+ iio_push_to_buffers(indio_dev, (u8 *)data, pf->timestamp);
iio_trigger_notify_done(indio_dev->trig);
kfree(data);
diff --git a/drivers/staging/iio/accel/adis16203_ring.c b/drivers/staging/iio/accel/adis16203_ring.c
index 6a8963d..456bb22 100644
--- a/drivers/staging/iio/accel/adis16203_ring.c
+++ b/drivers/staging/iio/accel/adis16203_ring.c
@@ -62,13 +62,10 @@ static irqreturn_t adis16203_trigger_handler(int irq, void *p)
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
struct adis16203_state *st = iio_priv(indio_dev);
- struct iio_buffer *ring = indio_dev->buffer;
-
int i = 0;
s16 *data;
- size_t datasize = ring->access->get_bytes_per_datum(ring);
- data = kmalloc(datasize, GFP_KERNEL);
+ data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
if (data == NULL) {
dev_err(&st->us->dev, "memory alloc failed in ring bh");
return -ENOMEM;
@@ -81,12 +78,10 @@ static irqreturn_t adis16203_trigger_handler(int irq, void *p)
data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2]));
/* Guaranteed to be aligned with 8 byte boundary */
- if (ring->scan_timestamp)
+ if (indio_dev->scan_timestamp)
*((s64 *)(data + ((i + 3)/4)*4)) = pf->timestamp;
- ring->access->store_to(ring,
- (u8 *)data,
- pf->timestamp);
+ iio_push_to_buffers(indio_dev, (u8 *)data, pf->timestamp);
iio_trigger_notify_done(indio_dev->trig);
kfree(data);
diff --git a/drivers/staging/iio/accel/adis16204_ring.c b/drivers/staging/iio/accel/adis16204_ring.c
index 5c8ab73..cc0f699 100644
--- a/drivers/staging/iio/accel/adis16204_ring.c
+++ b/drivers/staging/iio/accel/adis16204_ring.c
@@ -60,12 +60,10 @@ static irqreturn_t adis16204_trigger_handler(int irq, void *p)
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
struct adis16204_state *st = iio_priv(indio_dev);
- struct iio_buffer *ring = indio_dev->buffer;
int i = 0;
s16 *data;
- size_t datasize = ring->access->get_bytes_per_datum(ring);
- data = kmalloc(datasize, GFP_KERNEL);
+ data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
if (data == NULL) {
dev_err(&st->us->dev, "memory alloc failed in ring bh");
return -ENOMEM;
@@ -78,10 +76,10 @@ static irqreturn_t adis16204_trigger_handler(int irq, void *p)
data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2]));
/* Guaranteed to be aligned with 8 byte boundary */
- if (ring->scan_timestamp)
+ if (indio_dev->scan_timestamp)
*((s64 *)(data + ((i + 3)/4)*4)) = pf->timestamp;
- ring->access->store_to(ring, (u8 *)data, pf->timestamp);
+ iio_push_to_buffers(indio_dev, (u8 *)data, pf->timestamp);
iio_trigger_notify_done(indio_dev->trig);
kfree(data);
diff --git a/drivers/staging/iio/accel/adis16209_ring.c b/drivers/staging/iio/accel/adis16209_ring.c
index 57254b6..2c95f3d 100644
--- a/drivers/staging/iio/accel/adis16209_ring.c
+++ b/drivers/staging/iio/accel/adis16209_ring.c
@@ -60,13 +60,10 @@ static irqreturn_t adis16209_trigger_handler(int irq, void *p)
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
struct adis16209_state *st = iio_priv(indio_dev);
- struct iio_buffer *ring = indio_dev->buffer;
-
int i = 0;
s16 *data;
- size_t datasize = ring->access->get_bytes_per_datum(ring);
- data = kmalloc(datasize , GFP_KERNEL);
+ data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
if (data == NULL) {
dev_err(&st->us->dev, "memory alloc failed in ring bh");
return -ENOMEM;
@@ -79,10 +76,10 @@ static irqreturn_t adis16209_trigger_handler(int irq, void *p)
data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2]));
/* Guaranteed to be aligned with 8 byte boundary */
- if (ring->scan_timestamp)
+ if (indio_dev->scan_timestamp)
*((s64 *)(data + ((i + 3)/4)*4)) = pf->timestamp;
- ring->access->store_to(ring, (u8 *)data, pf->timestamp);
+ iio_push_to_buffers(indio_dev, (u8 *)data, pf->timestamp);
iio_trigger_notify_done(indio_dev->trig);
kfree(data);
diff --git a/drivers/staging/iio/accel/adis16240_ring.c b/drivers/staging/iio/accel/adis16240_ring.c
index 43ba84e..ee04154 100644
--- a/drivers/staging/iio/accel/adis16240_ring.c
+++ b/drivers/staging/iio/accel/adis16240_ring.c
@@ -57,13 +57,10 @@ static irqreturn_t adis16240_trigger_handler(int irq, void *p)
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
struct adis16240_state *st = iio_priv(indio_dev);
- struct iio_buffer *ring = indio_dev->buffer;
-
int i = 0;
s16 *data;
- size_t datasize = ring->access->get_bytes_per_datum(ring);
- data = kmalloc(datasize, GFP_KERNEL);
+ data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
if (data == NULL) {
dev_err(&st->us->dev, "memory alloc failed in ring bh");
return -ENOMEM;
@@ -76,10 +73,10 @@ static irqreturn_t adis16240_trigger_handler(int irq, void *p)
data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2]));
/* Guaranteed to be aligned with 8 byte boundary */
- if (ring->scan_timestamp)
+ if (indio_dev->scan_timestamp)
*((s64 *)(data + ((i + 3)/4)*4)) = pf->timestamp;
- ring->access->store_to(ring, (u8 *)data, pf->timestamp);
+ iio_push_to_buffers(indio_dev, (u8 *)data, pf->timestamp);
iio_trigger_notify_done(indio_dev->trig);
kfree(data);
diff --git a/drivers/staging/iio/accel/lis3l02dq_ring.c b/drivers/staging/iio/accel/lis3l02dq_ring.c
index 0fc3973..b493034 100644
--- a/drivers/staging/iio/accel/lis3l02dq_ring.c
+++ b/drivers/staging/iio/accel/lis3l02dq_ring.c
@@ -135,11 +135,10 @@ static irqreturn_t lis3l02dq_trigger_handler(int irq, void *p)
{
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
- struct iio_buffer *buffer = indio_dev->buffer;
int len = 0;
- size_t datasize = buffer->access->get_bytes_per_datum(buffer);
- char *data = kmalloc(datasize, GFP_KERNEL);
+ char *data;
+ data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
if (data == NULL) {
dev_err(indio_dev->dev.parent,
"memory alloc failed in buffer bh");
@@ -150,11 +149,11 @@ static irqreturn_t lis3l02dq_trigger_handler(int irq, void *p)
len = lis3l02dq_get_buffer_element(indio_dev, data);
/* Guaranteed to be aligned with 8 byte boundary */
- if (buffer->scan_timestamp)
+ if (indio_dev->scan_timestamp)
*(s64 *)(((phys_addr_t)data + len
+ sizeof(s64) - 1) & ~(sizeof(s64) - 1))
= pf->timestamp;
- buffer->access->store_to(buffer, (u8 *)data, pf->timestamp);
+ iio_push_to_buffers(indio_dev, (u8 *)data, pf->timestamp);
iio_trigger_notify_done(indio_dev->trig);
kfree(data);
diff --git a/drivers/staging/iio/adc/ad7192.c b/drivers/staging/iio/adc/ad7192.c
index 9fd6d63..be5f063 100644
--- a/drivers/staging/iio/adc/ad7192.c
+++ b/drivers/staging/iio/adc/ad7192.c
@@ -456,31 +456,19 @@ out:
static int ad7192_ring_preenable(struct iio_dev *indio_dev)
{
struct ad7192_state *st = iio_priv(indio_dev);
- struct iio_buffer *ring = indio_dev->buffer;
- size_t d_size;
unsigned channel;
+ int ret;
if (bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength))
return -EINVAL;
+ ret = iio_sw_buffer_preenable(indio_dev);
+ if (ret < 0)
+ return ret;
+
channel = find_first_bit(indio_dev->active_scan_mask,
indio_dev->masklength);
- d_size = bitmap_weight(indio_dev->active_scan_mask,
- indio_dev->masklength) *
- indio_dev->channels[0].scan_type.storagebits / 8;
-
- if (ring->scan_timestamp) {
- d_size += sizeof(s64);
-
- if (d_size % sizeof(s64))
- d_size += sizeof(s64) - (d_size % sizeof(s64));
- }
-
- if (indio_dev->buffer->access->set_bytes_per_datum)
- indio_dev->buffer->access->
- set_bytes_per_datum(indio_dev->buffer, d_size);
-
st->mode = (st->mode & ~AD7192_MODE_SEL(-1)) |
AD7192_MODE_SEL(AD7192_MODE_CONT);
st->conf = (st->conf & ~AD7192_CONF_CHAN(-1)) |
@@ -522,7 +510,6 @@ static irqreturn_t ad7192_trigger_handler(int irq, void *p)
{
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
- struct iio_buffer *ring = indio_dev->buffer;
struct ad7192_state *st = iio_priv(indio_dev);
s64 dat64[2];
s32 *dat32 = (s32 *)dat64;
@@ -533,10 +520,10 @@ static irqreturn_t ad7192_trigger_handler(int irq, void *p)
indio_dev->channels[0].scan_type.realbits/8);
/* Guaranteed to be aligned with 8 byte boundary */
- if (ring->scan_timestamp)
+ if (indio_dev->scan_timestamp)
dat64[1] = pf->timestamp;
- ring->access->store_to(ring, (u8 *)dat64, pf->timestamp);
+ iio_push_to_buffers(indio_dev, (u8 *)dat64, pf->timestamp);
iio_trigger_notify_done(indio_dev->trig);
st->irq_dis = false;
diff --git a/drivers/staging/iio/adc/ad7298.h b/drivers/staging/iio/adc/ad7298.h
index a0e5dea..5051a7e 100644
--- a/drivers/staging/iio/adc/ad7298.h
+++ b/drivers/staging/iio/adc/ad7298.h
@@ -38,7 +38,6 @@ struct ad7298_platform_data {
struct ad7298_state {
struct spi_device *spi;
struct regulator *reg;
- size_t d_size;
u16 int_vref_mv;
unsigned ext_ref;
struct spi_transfer ring_xfer[10];
diff --git a/drivers/staging/iio/adc/ad7298_ring.c b/drivers/staging/iio/adc/ad7298_ring.c
index feeb0ee..52ddfdf 100644
--- a/drivers/staging/iio/adc/ad7298_ring.c
+++ b/drivers/staging/iio/adc/ad7298_ring.c
@@ -28,25 +28,17 @@
static int ad7298_ring_preenable(struct iio_dev *indio_dev)
{
struct ad7298_state *st = iio_priv(indio_dev);
- struct iio_buffer *ring = indio_dev->buffer;
- size_t d_size;
int i, m;
unsigned short command;
- int scan_count = bitmap_weight(indio_dev->active_scan_mask,
- indio_dev->masklength);
- d_size = scan_count * (AD7298_STORAGE_BITS / 8);
+ int scan_count, ret;
- if (ring->scan_timestamp) {
- d_size += sizeof(s64);
+ ret = iio_sw_buffer_preenable(indio_dev);
+ if (ret < 0)
+ return ret;
- if (d_size % sizeof(s64))
- d_size += sizeof(s64) - (d_size % sizeof(s64));
- }
-
- if (ring->access->set_bytes_per_datum)
- ring->access->set_bytes_per_datum(ring, d_size);
-
- st->d_size = d_size;
+ /* Now compute overall size */
+ scan_count = bitmap_weight(indio_dev->active_scan_mask,
+ indio_dev->masklength);
command = AD7298_WRITE | st->ext_ref;
@@ -91,7 +83,6 @@ static irqreturn_t ad7298_trigger_handler(int irq, void *p)
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
struct ad7298_state *st = iio_priv(indio_dev);
- struct iio_buffer *ring = indio_dev->buffer;
s64 time_ns;
__u16 buf[16];
int b_sent, i;
@@ -100,17 +91,17 @@ static irqreturn_t ad7298_trigger_handler(int irq, void *p)
if (b_sent)
return b_sent;
- if (ring->scan_timestamp) {
+ if (indio_dev->scan_timestamp) {
time_ns = iio_get_time_ns();
- memcpy((u8 *)buf + st->d_size - sizeof(s64),
+ memcpy((u8 *)buf + indio_dev->scan_bytes - sizeof(s64),
&time_ns, sizeof(time_ns));
}
for (i = 0; i < bitmap_weight(indio_dev->active_scan_mask,
- indio_dev->masklength); i++)
+ indio_dev->masklength); i++)
buf[i] = be16_to_cpu(st->rx_buf[i]);
- indio_dev->buffer->access->store_to(ring, (u8 *)buf, time_ns);
+ iio_push_to_buffers(indio_dev, (u8 *)buf, time_ns);
iio_trigger_notify_done(indio_dev->trig);
return IRQ_HANDLED;
diff --git a/drivers/staging/iio/adc/ad7476.h b/drivers/staging/iio/adc/ad7476.h
index 27f696c..b1dd931 100644
--- a/drivers/staging/iio/adc/ad7476.h
+++ b/drivers/staging/iio/adc/ad7476.h
@@ -27,7 +27,6 @@ struct ad7476_state {
struct spi_device *spi;
const struct ad7476_chip_info *chip_info;
struct regulator *reg;
- size_t d_size;
u16 int_vref_mv;
struct spi_transfer xfer;
struct spi_message msg;
diff --git a/drivers/staging/iio/adc/ad7476_ring.c b/drivers/staging/iio/adc/ad7476_ring.c
index d6af6c0..21bce39 100644
--- a/drivers/staging/iio/adc/ad7476_ring.c
+++ b/drivers/staging/iio/adc/ad7476_ring.c
@@ -20,36 +20,6 @@
#include "ad7476.h"
-/**
- * ad7476_ring_preenable() setup the parameters of the ring before enabling
- *
- * The complex nature of the setting of the number of bytes per datum is due
- * to this driver currently ensuring that the timestamp is stored at an 8
- * byte boundary.
- **/
-static int ad7476_ring_preenable(struct iio_dev *indio_dev)
-{
- struct ad7476_state *st = iio_priv(indio_dev);
- struct iio_buffer *ring = indio_dev->buffer;
-
- st->d_size = bitmap_weight(indio_dev->active_scan_mask,
- indio_dev->masklength) *
- st->chip_info->channel[0].scan_type.storagebits / 8;
-
- if (ring->scan_timestamp) {
- st->d_size += sizeof(s64);
-
- if (st->d_size % sizeof(s64))
- st->d_size += sizeof(s64) - (st->d_size % sizeof(s64));
- }
-
- if (indio_dev->buffer->access->set_bytes_per_datum)
- indio_dev->buffer->access->
- set_bytes_per_datum(indio_dev->buffer, st->d_size);
-
- return 0;
-}
-
static irqreturn_t ad7476_trigger_handler(int irq, void *p)
{
struct iio_poll_func *pf = p;
@@ -59,7 +29,7 @@ static irqreturn_t ad7476_trigger_handler(int irq, void *p)
__u8 *rxbuf;
int b_sent;
- rxbuf = kzalloc(st->d_size, GFP_KERNEL);
+ rxbuf = kzalloc(indio_dev->scan_bytes, GFP_KERNEL);
if (rxbuf == NULL)
return -ENOMEM;
@@ -70,11 +40,11 @@ static irqreturn_t ad7476_trigger_handler(int irq, void *p)
time_ns = iio_get_time_ns();
- if (indio_dev->buffer->scan_timestamp)
- memcpy(rxbuf + st->d_size - sizeof(s64),
+ if (indio_dev->scan_timestamp)
+ memcpy(rxbuf + indio_dev->scan_bytes - sizeof(s64),
&time_ns, sizeof(time_ns));
- indio_dev->buffer->access->store_to(indio_dev->buffer, rxbuf, time_ns);
+ iio_push_to_buffers(indio_dev, rxbuf, time_ns);
done:
iio_trigger_notify_done(indio_dev->trig);
kfree(rxbuf);
@@ -83,7 +53,7 @@ done:
}
static const struct iio_buffer_setup_ops ad7476_ring_setup_ops = {
- .preenable = &ad7476_ring_preenable,
+ .preenable = &iio_sw_buffer_preenable,
.postenable = &iio_triggered_buffer_postenable,
.predisable = &iio_triggered_buffer_predisable,
};
diff --git a/drivers/staging/iio/adc/ad7606_ring.c b/drivers/staging/iio/adc/ad7606_ring.c
index 1ef9fbc..2d36a7a 100644
--- a/drivers/staging/iio/adc/ad7606_ring.c
+++ b/drivers/staging/iio/adc/ad7606_ring.c
@@ -46,13 +46,11 @@ static void ad7606_poll_bh_to_ring(struct work_struct *work_s)
struct ad7606_state *st = container_of(work_s, struct ad7606_state,
poll_work);
struct iio_dev *indio_dev = iio_priv_to_dev(st);
- struct iio_buffer *ring = indio_dev->buffer;
s64 time_ns;
__u8 *buf;
int ret;
- buf = kzalloc(ring->access->get_bytes_per_datum(ring),
- GFP_KERNEL);
+ buf = kzalloc(indio_dev->scan_bytes, GFP_KERNEL);
if (buf == NULL)
return;
@@ -82,11 +80,10 @@ static void ad7606_poll_bh_to_ring(struct work_struct *work_s)
time_ns = iio_get_time_ns();
- if (ring->scan_timestamp)
- *((s64 *)(buf + ring->access->get_bytes_per_datum(ring) -
- sizeof(s64))) = time_ns;
+ if (indio_dev->scan_timestamp)
+ *((s64 *)(buf + indio_dev->scan_bytes - sizeof(s64))) = time_ns;
- ring->access->store_to(indio_dev->buffer, buf, time_ns);
+ iio_push_to_buffers(indio_dev, buf, time_ns);
done:
gpio_set_value(st->pdata->gpio_convst, 0);
iio_trigger_notify_done(indio_dev->trig);
diff --git a/drivers/staging/iio/adc/ad7793.c b/drivers/staging/iio/adc/ad7793.c
index 84ecde1..156a5eb 100644
--- a/drivers/staging/iio/adc/ad7793.c
+++ b/drivers/staging/iio/adc/ad7793.c
@@ -319,31 +319,18 @@ out:
static int ad7793_ring_preenable(struct iio_dev *indio_dev)
{
struct ad7793_state *st = iio_priv(indio_dev);
- struct iio_buffer *ring = indio_dev->buffer;
- size_t d_size;
unsigned channel;
+ int ret;
if (bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength))
return -EINVAL;
+ ret = iio_sw_buffer_preenable(indio_dev);
+ if (ret < 0)
+ return ret;
channel = find_first_bit(indio_dev->active_scan_mask,
indio_dev->masklength);
- d_size = bitmap_weight(indio_dev->active_scan_mask,
- indio_dev->masklength) *
- indio_dev->channels[0].scan_type.storagebits / 8;
-
- if (ring->scan_timestamp) {
- d_size += sizeof(s64);
-
- if (d_size % sizeof(s64))
- d_size += sizeof(s64) - (d_size % sizeof(s64));
- }
-
- if (indio_dev->buffer->access->set_bytes_per_datum)
- indio_dev->buffer->access->
- set_bytes_per_datum(indio_dev->buffer, d_size);
-
st->mode = (st->mode & ~AD7793_MODE_SEL(-1)) |
AD7793_MODE_SEL(AD7793_MODE_CONT);
st->conf = (st->conf & ~AD7793_CONF_CHAN(-1)) |
@@ -388,7 +375,6 @@ static irqreturn_t ad7793_trigger_handler(int irq, void *p)
{
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
- struct iio_buffer *ring = indio_dev->buffer;
struct ad7793_state *st = iio_priv(indio_dev);
s64 dat64[2];
s32 *dat32 = (s32 *)dat64;
@@ -399,10 +385,10 @@ static irqreturn_t ad7793_trigger_handler(int irq, void *p)
indio_dev->channels[0].scan_type.realbits/8);
/* Guaranteed to be aligned with 8 byte boundary */
- if (ring->scan_timestamp)
+ if (indio_dev->scan_timestamp)
dat64[1] = pf->timestamp;
- ring->access->store_to(ring, (u8 *)dat64, pf->timestamp);
+ iio_push_to_buffers(indio_dev, (u8 *)dat64, pf->timestamp);
iio_trigger_notify_done(indio_dev->trig);
st->irq_dis = false;
diff --git a/drivers/staging/iio/adc/ad7887.h b/drivers/staging/iio/adc/ad7887.h
index bc53b65..2e09e54 100644
--- a/drivers/staging/iio/adc/ad7887.h
+++ b/drivers/staging/iio/adc/ad7887.h
@@ -63,7 +63,6 @@ struct ad7887_state {
struct spi_device *spi;
const struct ad7887_chip_info *chip_info;
struct regulator *reg;
- size_t d_size;
u16 int_vref_mv;
struct spi_transfer xfer[4];
struct spi_message msg[3];
diff --git a/drivers/staging/iio/adc/ad7887_ring.c b/drivers/staging/iio/adc/ad7887_ring.c
index d180907..cdfcc91 100644
--- a/drivers/staging/iio/adc/ad7887_ring.c
+++ b/drivers/staging/iio/adc/ad7887_ring.c
@@ -29,22 +29,11 @@
static int ad7887_ring_preenable(struct iio_dev *indio_dev)
{
struct ad7887_state *st = iio_priv(indio_dev);
- struct iio_buffer *ring = indio_dev->buffer;
-
- st->d_size = bitmap_weight(indio_dev->active_scan_mask,
- indio_dev->masklength) *
- st->chip_info->channel[0].scan_type.storagebits / 8;
-
- if (ring->scan_timestamp) {
- st->d_size += sizeof(s64);
-
- if (st->d_size % sizeof(s64))
- st->d_size += sizeof(s64) - (st->d_size % sizeof(s64));
- }
+ int ret;
- if (indio_dev->buffer->access->set_bytes_per_datum)
- indio_dev->buffer->access->
- set_bytes_per_datum(indio_dev->buffer, st->d_size);
+ ret = iio_sw_buffer_preenable(indio_dev);
+ if (ret < 0)
+ return ret;
/* We know this is a single long so can 'cheat' */
switch (*indio_dev->active_scan_mask) {
@@ -83,7 +72,6 @@ static irqreturn_t ad7887_trigger_handler(int irq, void *p)
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
struct ad7887_state *st = iio_priv(indio_dev);
- struct iio_buffer *ring = indio_dev->buffer;
s64 time_ns;
__u8 *buf;
int b_sent;
@@ -92,7 +80,7 @@ static irqreturn_t ad7887_trigger_handler(int irq, void *p)
indio_dev->masklength) *
st->chip_info->channel[0].scan_type.storagebits / 8;
- buf = kzalloc(st->d_size, GFP_KERNEL);
+ buf = kzalloc(indio_dev->scan_bytes, GFP_KERNEL);
if (buf == NULL)
return -ENOMEM;
@@ -103,11 +91,11 @@ static irqreturn_t ad7887_trigger_handler(int irq, void *p)
time_ns = iio_get_time_ns();
memcpy(buf, st->data, bytes);
- if (ring->scan_timestamp)
- memcpy(buf + st->d_size - sizeof(s64),
+ if (indio_dev->scan_timestamp)
+ memcpy(buf + indio_dev->scan_bytes - sizeof(s64),
&time_ns, sizeof(time_ns));
- indio_dev->buffer->access->store_to(indio_dev->buffer, buf, time_ns);
+ iio_push_to_buffers(indio_dev, buf, time_ns);
done:
kfree(buf);
iio_trigger_notify_done(indio_dev->trig);
diff --git a/drivers/staging/iio/adc/ad799x.h b/drivers/staging/iio/adc/ad799x.h
index 356f690..99f8abe 100644
--- a/drivers/staging/iio/adc/ad799x.h
+++ b/drivers/staging/iio/adc/ad799x.h
@@ -104,7 +104,6 @@ struct ad799x_chip_info {
struct ad799x_state {
struct i2c_client *client;
const struct ad799x_chip_info *chip_info;
- size_t d_size;
struct iio_trigger *trig;
struct regulator *reg;
u16 int_vref_mv;
diff --git a/drivers/staging/iio/adc/ad799x_ring.c b/drivers/staging/iio/adc/ad799x_ring.c
index 069765c..f09b7ef 100644
--- a/drivers/staging/iio/adc/ad799x_ring.c
+++ b/drivers/staging/iio/adc/ad799x_ring.c
@@ -32,9 +32,7 @@
**/
static int ad799x_ring_preenable(struct iio_dev *indio_dev)
{
- struct iio_buffer *ring = indio_dev->buffer;
struct ad799x_state *st = iio_priv(indio_dev);
-
/*
* Need to figure out the current mode based upon the requested
* scan mask in iio_dev
@@ -43,21 +41,7 @@ static int ad799x_ring_preenable(struct iio_dev *indio_dev)
if (st->id == ad7997 || st->id == ad7998)
ad7997_8_set_scan_mode(st, *indio_dev->active_scan_mask);
- st->d_size = bitmap_weight(indio_dev->active_scan_mask,
- indio_dev->masklength) * 2;
-
- if (ring->scan_timestamp) {
- st->d_size += sizeof(s64);
-
- if (st->d_size % sizeof(s64))
- st->d_size += sizeof(s64) - (st->d_size % sizeof(s64));
- }
-
- if (indio_dev->buffer->access->set_bytes_per_datum)
- indio_dev->buffer->access->
- set_bytes_per_datum(indio_dev->buffer, st->d_size);
-
- return 0;
+ return iio_sw_buffer_preenable(indio_dev);
}
/**
@@ -72,13 +56,12 @@ static irqreturn_t ad799x_trigger_handler(int irq, void *p)
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
struct ad799x_state *st = iio_priv(indio_dev);
- struct iio_buffer *ring = indio_dev->buffer;
s64 time_ns;
__u8 *rxbuf;
int b_sent;
u8 cmd;
- rxbuf = kmalloc(st->d_size, GFP_KERNEL);
+ rxbuf = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
if (rxbuf == NULL)
goto out;
@@ -111,11 +94,11 @@ static irqreturn_t ad799x_trigger_handler(int irq, void *p)
time_ns = iio_get_time_ns();
- if (ring->scan_timestamp)
- memcpy(rxbuf + st->d_size - sizeof(s64),
+ if (indio_dev->scan_timestamp)
+ memcpy(rxbuf + indio_dev->scan_bytes - sizeof(s64),
&time_ns, sizeof(time_ns));
- ring->access->store_to(indio_dev->buffer, rxbuf, time_ns);
+ iio_push_to_buffers(indio_dev, rxbuf, time_ns);
done:
kfree(rxbuf);
if (b_sent < 0)
diff --git a/drivers/staging/iio/adc/max1363_ring.c b/drivers/staging/iio/adc/max1363_ring.c
index d0a60a3..d20218d 100644
--- a/drivers/staging/iio/adc/max1363_ring.c
+++ b/drivers/staging/iio/adc/max1363_ring.c
@@ -54,7 +54,7 @@ static irqreturn_t max1363_trigger_handler(int irq, void *p)
d_size = numvals*2;
else
d_size = numvals;
- if (indio_dev->buffer->scan_timestamp) {
+ if (indio_dev->scan_timestamp) {
d_size += sizeof(s64);
if (d_size % sizeof(s64))
d_size += sizeof(s64) - (d_size % sizeof(s64));
@@ -78,9 +78,9 @@ static irqreturn_t max1363_trigger_handler(int irq, void *p)
time_ns = iio_get_time_ns();
- if (indio_dev->buffer->scan_timestamp)
+ if (indio_dev->scan_timestamp)
memcpy(rxbuf + d_size - sizeof(s64), &time_ns, sizeof(time_ns));
- iio_push_to_buffer(indio_dev->buffer, rxbuf, time_ns);
+ iio_push_to_buffers(indio_dev, rxbuf, time_ns);
done:
iio_trigger_notify_done(indio_dev->trig);
diff --git a/drivers/staging/iio/buffer.h b/drivers/staging/iio/buffer.h
index df2046d..83522e8 100644
--- a/drivers/staging/iio/buffer.h
+++ b/drivers/staging/iio/buffer.h
@@ -67,7 +67,8 @@ struct iio_buffer_access_funcs {
* @stufftoread: [INTERN] flag to indicate new data.
* @demux_list: [INTERN] list of operations required to demux the scan.
* @demux_bounce: [INTERN] buffer for doing gather from incoming scan.
- **/
+ * @buffer_list: [INTERN] entry in the devices list of current buffers.
+ */
struct iio_buffer {
int length;
int bytes_per_datum;
@@ -83,9 +84,22 @@ struct iio_buffer {
const struct attribute_group *attrs;
struct list_head demux_list;
unsigned char *demux_bounce;
+ struct list_head buffer_list;
};
/**
+ * iio_update_buffers() - add or remove buffer from active list
+ * @indio_dev: device to add buffer to
+ * @insert_buffer: buffer to insert
+ * @remove_buffer: buffer_to_remove
+ *
+ * Note this will tear down the all buffering and build it up again
+ */
+int iio_update_buffers(struct iio_dev *indio_dev,
+ struct iio_buffer *insert_buffer,
+ struct iio_buffer *remove_buffer);
+
+/**
* iio_buffer_init() - Initialize the buffer structure
* @buffer: buffer to be initialized
**/
@@ -116,12 +130,12 @@ int iio_scan_mask_set(struct iio_dev *indio_dev,
struct iio_buffer *buffer, int bit);
/**
- * iio_push_to_buffer() - push to a registered buffer.
- * @buffer: IIO buffer structure for device
- * @scan: Full scan.
+ * iio_push_to_buffers() - push to a registered buffer.
+ * @indio_dev: iio_dev structure for device.
+ * @data: Full scan.
* @timestamp:
*/
-int iio_push_to_buffer(struct iio_buffer *buffer, unsigned char *data,
+int iio_push_to_buffers(struct iio_dev *indio_dev, unsigned char *data,
s64 timestamp);
int iio_update_demux(struct iio_dev *indio_dev);
diff --git a/drivers/staging/iio/gyro/adis16260_ring.c b/drivers/staging/iio/gyro/adis16260_ring.c
index 711f151..59cc200 100644
--- a/drivers/staging/iio/gyro/adis16260_ring.c
+++ b/drivers/staging/iio/gyro/adis16260_ring.c
@@ -63,12 +63,10 @@ static irqreturn_t adis16260_trigger_handler(int irq, void *p)
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
struct adis16260_state *st = iio_priv(indio_dev);
- struct iio_buffer *ring = indio_dev->buffer;
int i = 0;
s16 *data;
- size_t datasize = ring->access->get_bytes_per_datum(ring);
- data = kmalloc(datasize , GFP_KERNEL);
+ data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
if (data == NULL) {
dev_err(&st->us->dev, "memory alloc failed in ring bh");
return -ENOMEM;
@@ -81,10 +79,10 @@ static irqreturn_t adis16260_trigger_handler(int irq, void *p)
data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2]));
/* Guaranteed to be aligned with 8 byte boundary */
- if (ring->scan_timestamp)
+ if (indio_dev->scan_timestamp)
*((s64 *)(data + ((i + 3)/4)*4)) = pf->timestamp;
- ring->access->store_to(ring, (u8 *)data, pf->timestamp);
+ iio_push_to_buffers(indio_dev, (u8 *)data, pf->timestamp);
iio_trigger_notify_done(indio_dev->trig);
kfree(data);
diff --git a/drivers/staging/iio/iio.h b/drivers/staging/iio/iio.h
index 833a849..bde4099 100644
--- a/drivers/staging/iio/iio.h
+++ b/drivers/staging/iio/iio.h
@@ -315,12 +315,16 @@ struct iio_buffer_setup_ops {
* and owner
* @event_interface: [INTERN] event chrdevs associated with interrupt lines
* @buffer: [DRIVER] any buffer present
+ * @buffer_list: [INTERN] list of all buffers currently attached
+ * @scan_bytes: [INTERN] num bytes captured to be fed to buffer demux
* @mlock: [INTERN] lock used to prevent simultaneous device state
* changes
* @available_scan_masks: [DRIVER] optional array of allowed bitmasks
* @masklength: [INTERN] the length of the mask established from
* channels
* @active_scan_mask: [INTERN] union of all scan masks requested by buffers
+ * @scan_timestamp: [INTERN] set if any buffers have requested timestamp
+ * @scan_index_timestamp:[INTERN] cache of the index to the timestamp
* @trig: [INTERN] current device trigger (buffer modes)
* @pollfunc: [DRIVER] function run on trigger being received
* @channels: [DRIVER] channel specification structure table
@@ -350,11 +354,15 @@ struct iio_dev {
struct iio_event_interface *event_interface;
struct iio_buffer *buffer;
+ struct list_head buffer_list;
+ int scan_bytes;
struct mutex mlock;
const unsigned long *available_scan_masks;
unsigned masklength;
const unsigned long *active_scan_mask;
+ bool scan_timestamp;
+ unsigned scan_index_timestamp;
struct iio_trigger *trig;
struct iio_poll_func *pollfunc;
diff --git a/drivers/staging/iio/iio_simple_dummy_buffer.c b/drivers/staging/iio/iio_simple_dummy_buffer.c
index bb4daf7..5be4749 100644
--- a/drivers/staging/iio/iio_simple_dummy_buffer.c
+++ b/drivers/staging/iio/iio_simple_dummy_buffer.c
@@ -46,14 +46,10 @@ static irqreturn_t iio_simple_dummy_trigger_h(int irq, void *p)
{
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
- struct iio_buffer *buffer = indio_dev->buffer;
int len = 0;
- /*
- * The datasize is obtained from the buffer. It was stored when
- * the preenable setup function was called.
- */
- size_t datasize = buffer->access->get_bytes_per_datum(buffer);
- u16 *data = kmalloc(datasize, GFP_KERNEL);
+ u16 *data;
+
+ data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
if (data == NULL)
return -ENOMEM;
@@ -79,7 +75,7 @@ static irqreturn_t iio_simple_dummy_trigger_h(int irq, void *p)
i < bitmap_weight(indio_dev->active_scan_mask,
indio_dev->masklength);
i++) {
- j = find_next_bit(buffer->scan_mask,
+ j = find_next_bit(indio_dev->buffer->scan_mask,
indio_dev->masklength, j + 1);
/* random access read form the 'device' */
data[i] = fakedata[j];
@@ -87,11 +83,11 @@ static irqreturn_t iio_simple_dummy_trigger_h(int irq, void *p)
}
}
/* Store a timestampe at an 8 byte boundary */
- if (buffer->scan_timestamp)
+ if (indio_dev->scan_timestamp)
*(s64 *)(((phys_addr_t)data + len
+ sizeof(s64) - 1) & ~(sizeof(s64) - 1))
= iio_get_time_ns();
- buffer->access->store_to(buffer, (u8 *)data, pf->timestamp);
+ iio_push_to_buffers(indio_dev, (u8 *)data, pf->timestamp);
kfree(data);
diff --git a/drivers/staging/iio/impedance-analyzer/ad5933.c b/drivers/staging/iio/impedance-analyzer/ad5933.c
index cd82b56..dd2dbde 100644
--- a/drivers/staging/iio/impedance-analyzer/ad5933.c
+++ b/drivers/staging/iio/impedance-analyzer/ad5933.c
@@ -537,19 +537,14 @@ static const struct iio_info ad5933_info = {
static int ad5933_ring_preenable(struct iio_dev *indio_dev)
{
struct ad5933_state *st = iio_priv(indio_dev);
- size_t d_size;
int ret;
if (bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength))
return -EINVAL;
- d_size = bitmap_weight(indio_dev->active_scan_mask,
- indio_dev->masklength) *
- ad5933_channels[1].scan_type.storagebits / 8;
-
- if (indio_dev->buffer->access->set_bytes_per_datum)
- indio_dev->buffer->access->
- set_bytes_per_datum(indio_dev->buffer, d_size);
+ ret = iio_sw_buffer_preenable(indio_dev);
+ if (ret < 0)
+ return ret;
ret = ad5933_reset(st);
if (ret < 0)
@@ -620,7 +615,6 @@ static void ad5933_work(struct work_struct *work)
struct ad5933_state *st = container_of(work,
struct ad5933_state, work.work);
struct iio_dev *indio_dev = i2c_get_clientdata(st->client);
- struct iio_buffer *ring = indio_dev->buffer;
signed short buf[2];
unsigned char status;
@@ -651,7 +645,7 @@ static void ad5933_work(struct work_struct *work)
buf[0] = be16_to_cpu(buf[0]);
}
/* save datum to the ring */
- ring->access->store_to(ring, (u8 *)buf, iio_get_time_ns());
+ iio_push_to_buffers(indio_dev, (u8 *)buf, iio_get_time_ns());
} else {
/* no data available - try again later */
schedule_delayed_work(&st->work, st->poll_time_jiffies);
diff --git a/drivers/staging/iio/imu/adis16400_ring.c b/drivers/staging/iio/imu/adis16400_ring.c
index 8daa038..a0b227e 100644
--- a/drivers/staging/iio/imu/adis16400_ring.c
+++ b/drivers/staging/iio/imu/adis16400_ring.c
@@ -119,12 +119,12 @@ static irqreturn_t adis16400_trigger_handler(int irq, void *p)
struct iio_buffer *ring = indio_dev->buffer;
int i = 0, j, ret = 0;
s16 *data;
- size_t datasize = ring->access->get_bytes_per_datum(ring);
+
/* Asumption that long is enough for maximum channels */
unsigned long mask = *indio_dev->active_scan_mask;
int scan_count = bitmap_weight(indio_dev->active_scan_mask,
indio_dev->masklength);
- data = kmalloc(datasize , GFP_KERNEL);
+ data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
if (data == NULL) {
dev_err(&st->us->dev, "memory alloc failed in ring bh");
return -ENOMEM;
@@ -152,7 +152,7 @@ static irqreturn_t adis16400_trigger_handler(int irq, void *p)
/* Guaranteed to be aligned with 8 byte boundary */
if (ring->scan_timestamp)
*((s64 *)(data + ((i + 3)/4)*4)) = pf->timestamp;
- ring->access->store_to(indio_dev->buffer, (u8 *) data, pf->timestamp);
+ iio_push_to_buffers(indio_dev, (u8 *) data, pf->timestamp);
iio_trigger_notify_done(indio_dev->trig);
diff --git a/drivers/staging/iio/industrialio-buffer.c b/drivers/staging/iio/industrialio-buffer.c
index 386ba76..db6e930 100644
--- a/drivers/staging/iio/industrialio-buffer.c
+++ b/drivers/staging/iio/industrialio-buffer.c
@@ -31,6 +31,16 @@ static const char * const iio_endian_prefix[] = {
[IIO_LE] = "le",
};
+static bool iio_buffer_is_primary_active(struct iio_dev *indio_dev)
+{
+ struct list_head *p;
+
+ list_for_each(p, &indio_dev->buffer_list)
+ if (p == &indio_dev->buffer->buffer_list)
+ return true;
+ return false;
+}
+
/**
* iio_buffer_read_first_n_outer() - chrdev read for buffer access
*
@@ -124,15 +134,17 @@ static ssize_t iio_scan_el_store(struct device *dev,
const char *buf,
size_t len)
{
- int ret = 0;
+ int ret;
bool state;
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct iio_buffer *buffer = indio_dev->buffer;
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
- state = !(buf[0] == '0');
+ ret = strtobool(buf, &state);
+ if (ret < 0)
+ return ret;
mutex_lock(&indio_dev->mlock);
- if (iio_buffer_enabled(indio_dev)) {
+ if (iio_buffer_is_primary_active(indio_dev)) {
ret = -EBUSY;
goto error_ret;
}
@@ -169,13 +181,16 @@ static ssize_t iio_scan_el_ts_store(struct device *dev,
const char *buf,
size_t len)
{
- int ret = 0;
+ int ret;
struct iio_dev *indio_dev = dev_get_drvdata(dev);
bool state;
- state = !(buf[0] == '0');
+ ret = strtobool(buf, &state);
+ if (ret < 0)
+ return ret;
+
mutex_lock(&indio_dev->mlock);
- if (iio_buffer_enabled(indio_dev)) {
+ if (iio_buffer_is_primary_active(indio_dev)) {
ret = -EBUSY;
goto error_ret;
}
@@ -276,32 +291,30 @@ int iio_buffer_register(struct iio_dev *indio_dev,
}
attrcount = attrcount_orig;
INIT_LIST_HEAD(&buffer->scan_el_dev_attr_list);
- if (channels) {
- /* new magic */
- for (i = 0; i < num_channels; i++) {
- /* Establish necessary mask length */
- if (channels[i].scan_index >
- (int)indio_dev->masklength - 1)
- indio_dev->masklength
- = indio_dev->channels[i].scan_index + 1;
-
- ret = iio_buffer_add_channel_sysfs(indio_dev,
- &channels[i]);
- if (ret < 0)
- goto error_cleanup_dynamic;
- attrcount += ret;
- if (channels[i].type == IIO_TIMESTAMP)
- buffer->scan_index_timestamp =
- channels[i].scan_index;
- }
- if (indio_dev->masklength && buffer->scan_mask == NULL) {
- buffer->scan_mask = kcalloc(BITS_TO_LONGS(indio_dev->masklength),
- sizeof(*buffer->scan_mask),
- GFP_KERNEL);
- if (buffer->scan_mask == NULL) {
- ret = -ENOMEM;
- goto error_cleanup_dynamic;
- }
+ for (i = 0; i < num_channels; i++) {
+ /* Establish necessary mask length */
+ if (channels[i].scan_index >
+ (int)indio_dev->masklength - 1)
+ indio_dev->masklength
+ = indio_dev->channels[i].scan_index + 1;
+
+ ret = iio_buffer_add_channel_sysfs(indio_dev,
+ &channels[i]);
+ if (ret < 0)
+ goto error_cleanup_dynamic;
+ attrcount += ret;
+ if (channels[i].type == IIO_TIMESTAMP)
+ indio_dev->scan_index_timestamp =
+ channels[i].scan_index;
+ }
+ if (indio_dev->masklength && buffer->scan_mask == NULL) {
+ buffer->scan_mask
+ = kcalloc(BITS_TO_LONGS(indio_dev->masklength),
+ sizeof(*buffer->scan_mask),
+ GFP_KERNEL);
+ if (buffer->scan_mask == NULL) {
+ ret = -ENOMEM;
+ goto error_cleanup_dynamic;
}
}
@@ -389,106 +402,6 @@ ssize_t iio_buffer_write_length(struct device *dev,
}
EXPORT_SYMBOL(iio_buffer_write_length);
-ssize_t iio_buffer_store_enable(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t len)
-{
- int ret;
- bool requested_state, current_state;
- int previous_mode;
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
- struct iio_buffer *buffer = indio_dev->buffer;
-
- mutex_lock(&indio_dev->mlock);
- previous_mode = indio_dev->currentmode;
- requested_state = !(buf[0] == '0');
- current_state = iio_buffer_enabled(indio_dev);
- if (current_state == requested_state) {
- printk(KERN_INFO "iio-buffer, current state requested again\n");
- goto done;
- }
- if (requested_state) {
- if (indio_dev->setup_ops->preenable) {
- ret = indio_dev->setup_ops->preenable(indio_dev);
- if (ret) {
- printk(KERN_ERR
- "Buffer not started:"
- "buffer preenable failed\n");
- goto error_ret;
- }
- }
- if (buffer->access->request_update) {
- ret = buffer->access->request_update(buffer);
- if (ret) {
- printk(KERN_INFO
- "Buffer not started:"
- "buffer parameter update failed\n");
- goto error_ret;
- }
- }
- /* Definitely possible for devices to support both of these.*/
- if (indio_dev->modes & INDIO_BUFFER_TRIGGERED) {
- if (!indio_dev->trig) {
- printk(KERN_INFO
- "Buffer not started: no trigger\n");
- ret = -EINVAL;
- goto error_ret;
- }
- indio_dev->currentmode = INDIO_BUFFER_TRIGGERED;
- } else if (indio_dev->modes & INDIO_BUFFER_HARDWARE)
- indio_dev->currentmode = INDIO_BUFFER_HARDWARE;
- else { /* should never be reached */
- ret = -EINVAL;
- goto error_ret;
- }
-
- if (indio_dev->setup_ops->postenable) {
- ret = indio_dev->setup_ops->postenable(indio_dev);
- if (ret) {
- printk(KERN_INFO
- "Buffer not started:"
- "postenable failed\n");
- indio_dev->currentmode = previous_mode;
- if (indio_dev->setup_ops->postdisable)
- indio_dev->setup_ops->
- postdisable(indio_dev);
- goto error_ret;
- }
- }
- } else {
- if (indio_dev->setup_ops->predisable) {
- ret = indio_dev->setup_ops->predisable(indio_dev);
- if (ret)
- goto error_ret;
- }
- indio_dev->currentmode = INDIO_DIRECT_MODE;
- if (indio_dev->setup_ops->postdisable) {
- ret = indio_dev->setup_ops->postdisable(indio_dev);
- if (ret)
- goto error_ret;
- }
- }
-done:
- mutex_unlock(&indio_dev->mlock);
- return len;
-
-error_ret:
- mutex_unlock(&indio_dev->mlock);
- return ret;
-}
-EXPORT_SYMBOL(iio_buffer_store_enable);
-
-ssize_t iio_buffer_show_enable(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
- return sprintf(buf, "%d\n", iio_buffer_enabled(indio_dev));
-}
-EXPORT_SYMBOL(iio_buffer_show_enable);
-
-/* note NULL used as error indicator as it doesn't make sense. */
static const unsigned long *iio_scan_mask_match(const unsigned long *av_masks,
unsigned int masklength,
const unsigned long *mask)
@@ -503,45 +416,220 @@ static const unsigned long *iio_scan_mask_match(const unsigned long *av_masks,
return NULL;
}
-int iio_sw_buffer_preenable(struct iio_dev *indio_dev)
+static int iio_compute_scan_bytes(struct iio_dev *indio_dev, const long *mask,
+ bool timestamp)
{
- struct iio_buffer *buffer = indio_dev->buffer;
const struct iio_chan_spec *ch;
unsigned bytes = 0;
int length, i;
- dev_dbg(&indio_dev->dev, "%s\n", __func__);
/* How much space will the demuxed element take? */
- for_each_set_bit(i, buffer->scan_mask,
+ for_each_set_bit(i, mask,
indio_dev->masklength) {
ch = iio_find_channel_from_si(indio_dev, i);
- length = ch->scan_type.storagebits/8;
+ length = ch->scan_type.storagebits / 8;
bytes = ALIGN(bytes, length);
bytes += length;
}
- if (buffer->scan_timestamp) {
+ if (timestamp) {
ch = iio_find_channel_from_si(indio_dev,
- buffer->scan_index_timestamp);
- length = ch->scan_type.storagebits/8;
+ indio_dev->scan_index_timestamp);
+ length = ch->scan_type.storagebits / 8;
bytes = ALIGN(bytes, length);
bytes += length;
}
- buffer->access->set_bytes_per_datum(buffer, bytes);
+ return bytes;
+}
+
+int iio_update_buffers(struct iio_dev *indio_dev,
+ struct iio_buffer *insert_buffer,
+ struct iio_buffer *remove_buffer)
+{
+ int ret;
+ struct iio_buffer *buffer;
+ unsigned long *compound_mask;
+
+ /* Wind down existing buffers - iff there are any */
+ if (!list_empty(&indio_dev->buffer_list)) {
+ if (indio_dev->setup_ops->predisable) {
+ ret = indio_dev->setup_ops->predisable(indio_dev);
+ if (ret)
+ goto error_ret;
+ }
+ indio_dev->currentmode = INDIO_DIRECT_MODE;
+ if (indio_dev->setup_ops->postdisable) {
+ ret = indio_dev->setup_ops->postdisable(indio_dev);
+ if (ret)
+ goto error_ret;
+ }
+ }
+ if (!indio_dev->available_scan_masks)
+ kfree(indio_dev->active_scan_mask);
+
+ if (insert_buffer)
+ list_add(&insert_buffer->buffer_list, &indio_dev->buffer_list);
+ if (remove_buffer)
+ list_del(&remove_buffer->buffer_list);
+
+ /* If no buffers in list, we are done */
+ if (list_empty(&indio_dev->buffer_list))
+ return 0;
/* What scan mask do we actually have ?*/
+ compound_mask = kzalloc(BITS_TO_LONGS(indio_dev->masklength)
+ *sizeof(long), GFP_KERNEL);
+ if (compound_mask == NULL)
+ return -ENOMEM;
+ list_for_each_entry(buffer, &indio_dev->buffer_list, buffer_list) {
+ bitmap_or(compound_mask, compound_mask, buffer->scan_mask,
+ indio_dev->masklength);
+ indio_dev->scan_timestamp |= buffer->scan_timestamp;
+ }
if (indio_dev->available_scan_masks)
indio_dev->active_scan_mask =
iio_scan_mask_match(indio_dev->available_scan_masks,
indio_dev->masklength,
- buffer->scan_mask);
+ compound_mask);
else
- indio_dev->active_scan_mask = buffer->scan_mask;
+ indio_dev->active_scan_mask = compound_mask;
+
iio_update_demux(indio_dev);
- if (indio_dev->info->update_scan_mode)
- return indio_dev->info
+ /* Wind up again */
+ if (indio_dev->setup_ops->preenable) {
+ ret = indio_dev->setup_ops->preenable(indio_dev);
+ if (ret) {
+ printk(KERN_ERR
+ "Buffer not started:"
+ "buffer preenable failed\n");
+ goto error_free_compound_mask;
+ }
+ }
+ indio_dev->scan_bytes =
+ iio_compute_scan_bytes(indio_dev,
+ indio_dev->active_scan_mask,
+ indio_dev->scan_timestamp);
+ list_for_each_entry(buffer, &indio_dev->buffer_list, buffer_list)
+ if (buffer->access->request_update) {
+ ret = buffer->access->request_update(buffer);
+ if (ret) {
+ printk(KERN_INFO
+ "Buffer not started:"
+ "buffer parameter update failed\n");
+ goto error_ret;
+ }
+ }
+ if (indio_dev->info->update_scan_mode) {
+ ret = indio_dev->info
->update_scan_mode(indio_dev,
indio_dev->active_scan_mask);
+ if (ret < 0)
+ goto error_free_compound_mask;
+ }
+ /* Definitely possible for devices to support both of these.*/
+ if (indio_dev->modes & INDIO_BUFFER_TRIGGERED) {
+ if (!indio_dev->trig) {
+ printk(KERN_INFO "Buffer not started: no trigger\n");
+ ret = -EINVAL;
+ goto error_free_compound_mask;
+ }
+ indio_dev->currentmode = INDIO_BUFFER_TRIGGERED;
+ } else if (indio_dev->modes & INDIO_BUFFER_HARDWARE) {
+ indio_dev->currentmode = INDIO_BUFFER_HARDWARE;
+ } else { /* should never be reached */
+ ret = -EINVAL;
+ goto error_free_compound_mask;
+ }
+
+ if (indio_dev->setup_ops->postenable) {
+ ret = indio_dev->setup_ops->postenable(indio_dev);
+ if (ret) {
+ printk(KERN_INFO
+ "Buffer not started: postenable failed\n");
+ indio_dev->currentmode = INDIO_DIRECT_MODE;
+ if (indio_dev->setup_ops->postdisable)
+ indio_dev->setup_ops->postdisable(indio_dev);
+ goto error_free_compound_mask;
+ }
+ }
+error_free_compound_mask:
+ indio_dev->active_scan_mask = NULL;
+ kfree(compound_mask);
+error_ret:
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(iio_update_buffers);
+
+ssize_t iio_buffer_store_enable(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t len)
+{
+ int ret;
+ bool requested_state;
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct iio_buffer *pbuf = indio_dev->buffer;
+ struct list_head *p;
+ bool inlist = false;
+
+ ret = strtobool(buf, &requested_state);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&indio_dev->mlock);
+
+ /* Find out if it is in the list */
+ list_for_each(p, &indio_dev->buffer_list)
+ if (p == &pbuf->buffer_list) {
+ inlist = true;
+ break;
+ }
+ /* Already enabled */
+ if (inlist && requested_state)
+ goto done;
+ /* Already disabled */
+ if (!inlist && !requested_state)
+ goto done;
+
+ if (requested_state)
+ ret = iio_update_buffers(indio_dev,
+ indio_dev->buffer, NULL);
+ else
+ ret = iio_update_buffers(indio_dev,
+ NULL, indio_dev->buffer);
+
+ if (ret < 0)
+ goto done;
+done:
+ mutex_unlock(&indio_dev->mlock);
+ return (ret < 0) ? ret : len;
+}
+EXPORT_SYMBOL(iio_buffer_store_enable);
+
+ssize_t iio_buffer_show_enable(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ return sprintf(buf, "%d\n", iio_buffer_enabled(indio_dev));
+}
+EXPORT_SYMBOL(iio_buffer_show_enable);
+
+int iio_sw_buffer_preenable(struct iio_dev *indio_dev)
+{
+ struct iio_buffer *buffer;
+ unsigned bytes;
+ dev_dbg(&indio_dev->dev, "%s\n", __func__);
+
+ list_for_each_entry(buffer, &indio_dev->buffer_list, buffer_list)
+ if (buffer->access->set_bytes_per_datum) {
+ bytes = iio_compute_scan_bytes(indio_dev,
+ buffer->scan_mask,
+ buffer->scan_timestamp);
+
+ buffer->access->set_bytes_per_datum(buffer, bytes);
+ }
return 0;
}
EXPORT_SYMBOL(iio_sw_buffer_preenable);
@@ -550,7 +638,11 @@ EXPORT_SYMBOL(iio_sw_buffer_preenable);
* iio_scan_mask_set() - set particular bit in the scan mask
* @buffer: the buffer whose scan mask we are interested in
* @bit: the bit to be set.
- **/
+ *
+ * Note that at this point we have no way of knowing what other
+ * buffers might request, hence this code only verifies that the
+ * individual buffers request is plausible.
+ */
int iio_scan_mask_set(struct iio_dev *indio_dev,
struct iio_buffer *buffer, int bit)
{
@@ -580,7 +672,7 @@ int iio_scan_mask_set(struct iio_dev *indio_dev,
return -EINVAL;
}
}
- bitmap_copy(buffer->scan_mask, trialmask, indio_dev->masklength);
+ set_bit(bit, buffer->scan_mask);
kfree(trialmask);
@@ -629,105 +721,132 @@ static unsigned char *iio_demux(struct iio_buffer *buffer,
return buffer->demux_bounce;
}
-int iio_push_to_buffer(struct iio_buffer *buffer, unsigned char *data,
+static int iio_push_to_buffer(struct iio_buffer *buffer, unsigned char *data,
s64 timestamp)
{
unsigned char *dataout = iio_demux(buffer, data);
return buffer->access->store_to(buffer, dataout, timestamp);
}
-EXPORT_SYMBOL_GPL(iio_push_to_buffer);
+
+int iio_push_to_buffers(struct iio_dev *indio_dev, unsigned char *data,
+ s64 timestamp)
+{
+ int ret;
+ struct iio_buffer *buf;
+
+ list_for_each_entry(buf, &indio_dev->buffer_list, buffer_list) {
+ ret = iio_push_to_buffer(buf, data, timestamp);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(iio_push_to_buffers);
int iio_update_demux(struct iio_dev *indio_dev)
{
const struct iio_chan_spec *ch;
- struct iio_buffer *buffer = indio_dev->buffer;
- int ret, in_ind = -1, out_ind, length;
- unsigned in_loc = 0, out_loc = 0;
+ struct iio_buffer *buffer;
struct iio_demux_table *p, *q;
+ int ret;
- /* Clear out any old demux */
- list_for_each_entry_safe(p, q, &buffer->demux_list, l) {
- list_del(&p->l);
- kfree(p);
- }
- kfree(buffer->demux_bounce);
- buffer->demux_bounce = NULL;
-
- /* First work out which scan mode we will actually have */
- if (bitmap_equal(indio_dev->active_scan_mask,
- buffer->scan_mask,
- indio_dev->masklength))
- return 0;
+ list_for_each_entry(buffer, &indio_dev->buffer_list, buffer_list) {
+ unsigned in_loc = 0, out_loc = 0;
+ int in_ind = -1, out_ind, length;
- /* Now we have the two masks, work from least sig and build up sizes */
- for_each_set_bit(out_ind,
- indio_dev->active_scan_mask,
- indio_dev->masklength) {
- in_ind = find_next_bit(indio_dev->active_scan_mask,
- indio_dev->masklength,
- in_ind + 1);
- while (in_ind != out_ind) {
+ /* Clear out any old demux */
+ list_for_each_entry_safe(p, q, &buffer->demux_list, l) {
+ list_del(&p->l);
+ kfree(p);
+ }
+ kfree(buffer->demux_bounce);
+ buffer->demux_bounce = NULL;
+
+ /* First work out which scan mode we will actually have */
+ if (bitmap_equal(indio_dev->active_scan_mask,
+ buffer->scan_mask,
+ indio_dev->masklength))
+ return 0;
+
+ /*
+ * Now we have the two masks, work from least sig
+ * and build up sizes.
+ */
+ for_each_set_bit(out_ind,
+ indio_dev->active_scan_mask,
+ indio_dev->masklength) {
in_ind = find_next_bit(indio_dev->active_scan_mask,
indio_dev->masklength,
in_ind + 1);
+ while (in_ind != out_ind) {
+ in_ind = find_next_bit(indio_dev->
+ active_scan_mask,
+ indio_dev->masklength,
+ in_ind + 1);
+ ch = iio_find_channel_from_si(indio_dev,
+ in_ind);
+ length = ch->scan_type.storagebits/8;
+ /* Make sure we are aligned */
+ in_loc += length;
+ if (in_loc % length)
+ in_loc += length - in_loc % length;
+ }
+ p = kmalloc(sizeof(*p), GFP_KERNEL);
+ if (p == NULL) {
+ ret = -ENOMEM;
+ goto error_clear_mux_table;
+ }
ch = iio_find_channel_from_si(indio_dev, in_ind);
length = ch->scan_type.storagebits/8;
- /* Make sure we are aligned */
- in_loc += length;
+ if (out_loc % length)
+ out_loc += length - out_loc % length;
if (in_loc % length)
in_loc += length - in_loc % length;
+ p->from = in_loc;
+ p->to = out_loc;
+ p->length = length;
+ list_add_tail(&p->l, &buffer->demux_list);
+ out_loc += length;
+ in_loc += length;
}
- p = kmalloc(sizeof(*p), GFP_KERNEL);
- if (p == NULL) {
- ret = -ENOMEM;
- goto error_clear_mux_table;
+ /* Relies on scan_timestamp being last */
+ if (buffer->scan_timestamp) {
+ p = kmalloc(sizeof(*p), GFP_KERNEL);
+ if (p == NULL) {
+ ret = -ENOMEM;
+ goto error_clear_mux_table;
+ }
+ ch = iio_find_channel_from_si(indio_dev,
+ indio_dev->
+ scan_index_timestamp);
+ length = ch->scan_type.storagebits/8;
+ if (out_loc % length)
+ out_loc += length - out_loc % length;
+ if (in_loc % length)
+ in_loc += length - in_loc % length;
+ p->from = in_loc;
+ p->to = out_loc;
+ p->length = length;
+ list_add_tail(&p->l, &buffer->demux_list);
+ out_loc += length;
+ in_loc += length;
}
- ch = iio_find_channel_from_si(indio_dev, in_ind);
- length = ch->scan_type.storagebits/8;
- if (out_loc % length)
- out_loc += length - out_loc % length;
- if (in_loc % length)
- in_loc += length - in_loc % length;
- p->from = in_loc;
- p->to = out_loc;
- p->length = length;
- list_add_tail(&p->l, &buffer->demux_list);
- out_loc += length;
- in_loc += length;
- }
- /* Relies on scan_timestamp being last */
- if (buffer->scan_timestamp) {
- p = kmalloc(sizeof(*p), GFP_KERNEL);
- if (p == NULL) {
+ buffer->demux_bounce = kzalloc(out_loc, GFP_KERNEL);
+ if (buffer->demux_bounce == NULL) {
ret = -ENOMEM;
goto error_clear_mux_table;
}
- ch = iio_find_channel_from_si(indio_dev,
- buffer->scan_index_timestamp);
- length = ch->scan_type.storagebits/8;
- if (out_loc % length)
- out_loc += length - out_loc % length;
- if (in_loc % length)
- in_loc += length - in_loc % length;
- p->from = in_loc;
- p->to = out_loc;
- p->length = length;
- list_add_tail(&p->l, &buffer->demux_list);
- out_loc += length;
- in_loc += length;
- }
- buffer->demux_bounce = kzalloc(out_loc, GFP_KERNEL);
- if (buffer->demux_bounce == NULL) {
- ret = -ENOMEM;
- goto error_clear_mux_table;
}
return 0;
error_clear_mux_table:
- list_for_each_entry_safe(p, q, &buffer->demux_list, l) {
- list_del(&p->l);
- kfree(p);
+ list_for_each_entry(buffer, &indio_dev->buffer_list, buffer_list) {
+ list_for_each_entry_safe(p, q, &buffer->demux_list, l) {
+ list_del(&p->l);
+ kfree(p);
+ }
}
return ret;
}
diff --git a/drivers/staging/iio/industrialio-core.c b/drivers/staging/iio/industrialio-core.c
index 27695df..5f4e57e 100644
--- a/drivers/staging/iio/industrialio-core.c
+++ b/drivers/staging/iio/industrialio-core.c
@@ -784,6 +784,7 @@ struct iio_dev *iio_allocate_device(int sizeof_priv)
return NULL;
}
dev_set_name(&dev->dev, "iio:device%d", dev->id);
+ INIT_LIST_HEAD(&dev->buffer_list);
}
return dev;
diff --git a/drivers/staging/iio/meter/ade7758_ring.c b/drivers/staging/iio/meter/ade7758_ring.c
index c45b23b..69ec41a 100644
--- a/drivers/staging/iio/meter/ade7758_ring.c
+++ b/drivers/staging/iio/meter/ade7758_ring.c
@@ -62,7 +62,6 @@ static irqreturn_t ade7758_trigger_handler(int irq, void *p)
{
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
- struct iio_buffer *ring = indio_dev->buffer;
struct ade7758_state *st = iio_priv(indio_dev);
s64 dat64[2];
u32 *dat32 = (u32 *)dat64;
@@ -72,10 +71,10 @@ static irqreturn_t ade7758_trigger_handler(int irq, void *p)
*dat32 = get_unaligned_be32(&st->rx_buf[5]) & 0xFFFFFF;
/* Guaranteed to be aligned with 8 byte boundary */
- if (ring->scan_timestamp)
+ if (indio_dev->scan_timestamp)
dat64[1] = pf->timestamp;
- ring->access->store_to(ring, (u8 *)dat64, pf->timestamp);
+ iio_push_to_buffers(indio_dev, (u8 *)dat64, pf->timestamp);
iio_trigger_notify_done(indio_dev->trig);
@@ -92,29 +91,19 @@ static irqreturn_t ade7758_trigger_handler(int irq, void *p)
static int ade7758_ring_preenable(struct iio_dev *indio_dev)
{
struct ade7758_state *st = iio_priv(indio_dev);
- struct iio_buffer *ring = indio_dev->buffer;
- size_t d_size;
unsigned channel;
+ int ret;
if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength))
return -EINVAL;
+ ret = iio_sw_buffer_preenable(indio_dev);
+ if (ret < 0)
+ return ret;
+
channel = find_first_bit(indio_dev->active_scan_mask,
indio_dev->masklength);
- d_size = st->ade7758_ring_channels[channel].scan_type.storagebits / 8;
-
- if (ring->scan_timestamp) {
- d_size += sizeof(s64);
-
- if (d_size % sizeof(s64))
- d_size += sizeof(s64) - (d_size % sizeof(s64));
- }
-
- if (indio_dev->buffer->access->set_bytes_per_datum)
- indio_dev->buffer->access->
- set_bytes_per_datum(indio_dev->buffer, d_size);
-
ade7758_write_waveform_type(&indio_dev->dev,
st->ade7758_ring_channels[channel].address);
--
1.7.9.2
--
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