diff options
| -rw-r--r-- | drivers/iio/buffer/industrialio-buffer-dmaengine.c | 4 | ||||
| -rw-r--r-- | drivers/iio/buffer/industrialio-triggered-buffer.c | 10 | ||||
| -rw-r--r-- | drivers/iio/buffer/kfifo_buf.c | 4 | ||||
| -rw-r--r-- | drivers/iio/iio_core.h | 10 | ||||
| -rw-r--r-- | drivers/iio/industrialio-buffer.c | 100 | ||||
| -rw-r--r-- | drivers/iio/industrialio-core.c | 12 | ||||
| -rw-r--r-- | include/linux/iio/buffer.h | 4 | ||||
| -rw-r--r-- | include/linux/iio/buffer_impl.h | 3 | ||||
| -rw-r--r-- | include/linux/iio/iio-opaque.h | 4 |
9 files changed, 111 insertions, 40 deletions
diff --git a/drivers/iio/buffer/industrialio-buffer-dmaengine.c b/drivers/iio/buffer/industrialio-buffer-dmaengine.c index a64b222289be..d76179878ff9 100644 --- a/drivers/iio/buffer/industrialio-buffer-dmaengine.c +++ b/drivers/iio/buffer/industrialio-buffer-dmaengine.c @@ -290,9 +290,7 @@ int devm_iio_dmaengine_buffer_setup(struct device *dev, indio_dev->modes |= INDIO_BUFFER_HARDWARE; - iio_device_attach_buffer(indio_dev, buffer); - - return 0; + return iio_device_attach_buffer(indio_dev, buffer); } EXPORT_SYMBOL_GPL(devm_iio_dmaengine_buffer_setup); diff --git a/drivers/iio/buffer/industrialio-triggered-buffer.c b/drivers/iio/buffer/industrialio-triggered-buffer.c index 92b8aea3e063..b2b1b7d27af4 100644 --- a/drivers/iio/buffer/industrialio-triggered-buffer.c +++ b/drivers/iio/buffer/industrialio-triggered-buffer.c @@ -50,8 +50,6 @@ int iio_triggered_buffer_setup_ext(struct iio_dev *indio_dev, goto error_ret; } - iio_device_attach_buffer(indio_dev, buffer); - indio_dev->pollfunc = iio_alloc_pollfunc(h, thread, IRQF_ONESHOT, @@ -72,10 +70,16 @@ int iio_triggered_buffer_setup_ext(struct iio_dev *indio_dev, buffer->attrs = buffer_attrs; + ret = iio_device_attach_buffer(indio_dev, buffer); + if (ret < 0) + goto error_dealloc_pollfunc; + return 0; +error_dealloc_pollfunc: + iio_dealloc_pollfunc(indio_dev->pollfunc); error_kfifo_free: - iio_kfifo_free(indio_dev->buffer); + iio_kfifo_free(buffer); error_ret: return ret; } diff --git a/drivers/iio/buffer/kfifo_buf.c b/drivers/iio/buffer/kfifo_buf.c index c35a625280b1..34289ce12f20 100644 --- a/drivers/iio/buffer/kfifo_buf.c +++ b/drivers/iio/buffer/kfifo_buf.c @@ -235,12 +235,10 @@ int devm_iio_kfifo_buffer_setup(struct device *dev, if (!buffer) return -ENOMEM; - iio_device_attach_buffer(indio_dev, buffer); - indio_dev->modes |= mode_flags; indio_dev->setup_ops = setup_ops; - return 0; + return iio_device_attach_buffer(indio_dev, buffer); } EXPORT_SYMBOL_GPL(devm_iio_kfifo_buffer_setup); diff --git a/drivers/iio/iio_core.h b/drivers/iio/iio_core.h index 87868fff7d37..7990c759f1f5 100644 --- a/drivers/iio/iio_core.h +++ b/drivers/iio/iio_core.h @@ -69,29 +69,31 @@ __poll_t iio_buffer_poll(struct file *filp, ssize_t iio_buffer_read_outer(struct file *filp, char __user *buf, size_t n, loff_t *f_ps); -int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev); -void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev); +int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev); +void iio_buffers_free_sysfs_and_mask(struct iio_dev *indio_dev); #define iio_buffer_poll_addr (&iio_buffer_poll) #define iio_buffer_read_outer_addr (&iio_buffer_read_outer) void iio_disable_all_buffers(struct iio_dev *indio_dev); void iio_buffer_wakeup_poll(struct iio_dev *indio_dev); +void iio_buffers_put(struct iio_dev *indio_dev); #else #define iio_buffer_poll_addr NULL #define iio_buffer_read_outer_addr NULL -static inline int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev) +static inline int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev) { return 0; } -static inline void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev) {} +static inline void iio_buffers_free_sysfs_and_mask(struct iio_dev *indio_dev) {} static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {} static inline void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) {} +static inline void iio_buffers_put(struct iio_dev *indio_dev) {} #endif diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index 349c0c011745..b60c2e66bd1c 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -193,12 +193,14 @@ __poll_t iio_buffer_poll(struct file *filp, */ void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) { - struct iio_buffer *buffer = indio_dev->buffer; - - if (!buffer) - return; + struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev); + struct iio_buffer *buffer; + unsigned int i; - wake_up(&buffer->pollq); + for (i = 0; i < iio_dev_opaque->attached_buffers_cnt; i++) { + buffer = iio_dev_opaque->attached_buffers[i]; + wake_up(&buffer->pollq); + } } void iio_buffer_init(struct iio_buffer *buffer) @@ -212,6 +214,18 @@ void iio_buffer_init(struct iio_buffer *buffer) } EXPORT_SYMBOL(iio_buffer_init); +void iio_buffers_put(struct iio_dev *indio_dev) +{ + struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev); + struct iio_buffer *buffer; + unsigned int i; + + for (i = 0; i < iio_dev_opaque->attached_buffers_cnt; i++) { + buffer = iio_dev_opaque->attached_buffers[i]; + iio_buffer_put(buffer); + } +} + static ssize_t iio_show_scan_index(struct device *dev, struct device_attribute *attr, char *buf) @@ -1452,11 +1466,13 @@ static void __iio_buffer_free_sysfs_and_mask(struct iio_buffer *buffer) iio_free_chan_devattr_list(&buffer->buffer_attr_list); } -int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev) +int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev) { - struct iio_buffer *buffer = indio_dev->buffer; + struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev); const struct iio_chan_spec *channels; - int i; + struct iio_buffer *buffer; + int unwind_idx; + int ret, i; channels = indio_dev->channels; if (channels) { @@ -1467,22 +1483,46 @@ int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev) indio_dev->masklength = ml; } - if (!buffer) + if (!iio_dev_opaque->attached_buffers_cnt) return 0; - return __iio_buffer_alloc_sysfs_and_mask(buffer, indio_dev, 0); + for (i = 0; i < iio_dev_opaque->attached_buffers_cnt; i++) { + buffer = iio_dev_opaque->attached_buffers[i]; + ret = __iio_buffer_alloc_sysfs_and_mask(buffer, indio_dev, i); + if (ret) { + unwind_idx = i; + goto error_unwind_sysfs_and_mask; + } + } + + return 0; + +error_unwind_sysfs_and_mask: + for (; unwind_idx >= 0; unwind_idx--) { + buffer = iio_dev_opaque->attached_buffers[unwind_idx]; + __iio_buffer_free_sysfs_and_mask(buffer); + } + kfree(iio_dev_opaque->attached_buffers); + return ret; } -void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev) +void iio_buffers_free_sysfs_and_mask(struct iio_dev *indio_dev) { - struct iio_buffer *buffer = indio_dev->buffer; + struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev); + struct iio_buffer *buffer; + int i; - if (!buffer) + if (!iio_dev_opaque->attached_buffers_cnt) return; iio_buffer_unregister_legacy_sysfs_groups(indio_dev); - __iio_buffer_free_sysfs_and_mask(buffer); + for (i = iio_dev_opaque->attached_buffers_cnt - 1; i >= 0; i--) { + buffer = iio_dev_opaque->attached_buffers[i]; + __iio_buffer_free_sysfs_and_mask(buffer); + } + + kfree(iio_dev_opaque->attached_buffers); } /** @@ -1600,13 +1640,35 @@ EXPORT_SYMBOL_GPL(iio_buffer_put); * @indio_dev: The device the buffer should be attached to * @buffer: The buffer to attach to the device * + * Return 0 if successful, negative if error. + * * This function attaches a buffer to a IIO device. The buffer stays attached to - * the device until the device is freed. The function should only be called at - * most once per device. + * the device until the device is freed. For legacy reasons, the first attached + * buffer will also be assigned to 'indio_dev->buffer'. */ -void iio_device_attach_buffer(struct iio_dev *indio_dev, - struct iio_buffer *buffer) +int iio_device_attach_buffer(struct iio_dev *indio_dev, + struct iio_buffer *buffer) { - indio_dev->buffer = iio_buffer_get(buffer); + struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev); + struct iio_buffer **new, **old = iio_dev_opaque->attached_buffers; + unsigned int cnt = iio_dev_opaque->attached_buffers_cnt; + + cnt++; + + new = krealloc(old, sizeof(*new) * cnt, GFP_KERNEL); + if (!new) + return -ENOMEM; + iio_dev_opaque->attached_buffers = new; + + buffer = iio_buffer_get(buffer); + + /* first buffer is legacy; attach it to the IIO device directly */ + if (!indio_dev->buffer) + indio_dev->buffer = buffer; + + iio_dev_opaque->attached_buffers[cnt - 1] = buffer; + iio_dev_opaque->attached_buffers_cnt = cnt; + + return 0; } EXPORT_SYMBOL_GPL(iio_device_attach_buffer); diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index b96acfe13e92..1645c739c44f 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -1585,7 +1585,7 @@ static void iio_dev_release(struct device *device) iio_device_unregister_eventset(indio_dev); iio_device_unregister_sysfs(indio_dev); - iio_buffer_put(indio_dev->buffer); + iio_buffers_put(indio_dev); ida_simple_remove(&iio_ida, indio_dev->id); kfree(iio_dev_opaque); @@ -1862,7 +1862,7 @@ int __iio_device_register(struct iio_dev *indio_dev, struct module *this_mod) iio_device_register_debugfs(indio_dev); - ret = iio_buffer_alloc_sysfs_and_mask(indio_dev); + ret = iio_buffers_alloc_sysfs_and_mask(indio_dev); if (ret) { dev_err(indio_dev->dev.parent, "Failed to create buffer sysfs interfaces\n"); @@ -1888,12 +1888,12 @@ int __iio_device_register(struct iio_dev *indio_dev, struct module *this_mod) indio_dev->setup_ops == NULL) indio_dev->setup_ops = &noop_ring_setup_ops; - if (indio_dev->buffer) + if (iio_dev_opaque->attached_buffers_cnt) cdev_init(&indio_dev->chrdev, &iio_buffer_fileops); else if (iio_dev_opaque->event_interface) cdev_init(&indio_dev->chrdev, &iio_event_fileops); - if (indio_dev->buffer || iio_dev_opaque->event_interface) { + if (iio_dev_opaque->attached_buffers_cnt || iio_dev_opaque->event_interface) { indio_dev->dev.devt = MKDEV(MAJOR(iio_devt), indio_dev->id); indio_dev->chrdev.owner = this_mod; } @@ -1912,7 +1912,7 @@ error_unreg_eventset: error_free_sysfs: iio_device_unregister_sysfs(indio_dev); error_buffer_free_sysfs: - iio_buffer_free_sysfs_and_mask(indio_dev); + iio_buffers_free_sysfs_and_mask(indio_dev); error_unreg_debugfs: iio_device_unregister_debugfs(indio_dev); return ret; @@ -1946,7 +1946,7 @@ void iio_device_unregister(struct iio_dev *indio_dev) mutex_unlock(&indio_dev->info_exist_lock); - iio_buffer_free_sysfs_and_mask(indio_dev); + iio_buffers_free_sysfs_and_mask(indio_dev); } EXPORT_SYMBOL(iio_device_unregister); diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h index 8febc23f5f26..b6928ac5c63d 100644 --- a/include/linux/iio/buffer.h +++ b/include/linux/iio/buffer.h @@ -41,7 +41,7 @@ static inline int iio_push_to_buffers_with_timestamp(struct iio_dev *indio_dev, bool iio_validate_scan_mask_onehot(struct iio_dev *indio_dev, const unsigned long *mask); -void iio_device_attach_buffer(struct iio_dev *indio_dev, - struct iio_buffer *buffer); +int iio_device_attach_buffer(struct iio_dev *indio_dev, + struct iio_buffer *buffer); #endif /* _IIO_BUFFER_GENERIC_H_ */ diff --git a/include/linux/iio/buffer_impl.h b/include/linux/iio/buffer_impl.h index 41044320e581..768b90c64412 100644 --- a/include/linux/iio/buffer_impl.h +++ b/include/linux/iio/buffer_impl.h @@ -112,6 +112,9 @@ struct iio_buffer { /* @demux_bounce: Buffer for doing gather from incoming scan. */ void *demux_bounce; + /* @attached_entry: Entry in the devices list of buffers attached by the driver. */ + struct list_head attached_entry; + /* @buffer_list: Entry in the devices list of current buffers. */ struct list_head buffer_list; diff --git a/include/linux/iio/iio-opaque.h b/include/linux/iio/iio-opaque.h index 1a9310b0145f..b6ebc04af3e7 100644 --- a/include/linux/iio/iio-opaque.h +++ b/include/linux/iio/iio-opaque.h @@ -7,6 +7,8 @@ * struct iio_dev_opaque - industrial I/O device opaque information * @indio_dev: public industrial I/O device information * @event_interface: event chrdevs associated with interrupt lines + * @attached_buffers: array of buffers statically attached by the driver + * @attached_buffers_cnt: number of buffers in the array of statically attached buffers * @buffer_list: list of all buffers currently attached * @channel_attr_list: keep track of automatically created channel * attributes @@ -24,6 +26,8 @@ struct iio_dev_opaque { struct iio_dev indio_dev; struct iio_event_interface *event_interface; + struct iio_buffer **attached_buffers; + unsigned int attached_buffers_cnt; struct list_head buffer_list; struct list_head channel_attr_list; struct attribute_group chan_attr_group; |