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Message-Id: <1187714678.26535.8.camel@dwillia2-linux.ch.intel.com>
Date: Tue, 21 Aug 2007 09:44:38 -0700
From: Dan Williams <dan.j.williams@...el.com>
To: Shannon Nelson <shannon.nelson@...el.com>
Cc: tonyj@...e.de, kay.sievers@...y.org, linux-kernel@...r.kernel.org
Subject: [PATCH] Convert from class_device to device for DMA engine
From: Tony Jones <tonyj@...e.de>
Convert from class_device to device for drivers/dma/dmaengine. This is
part of the work to eliminate struct class_device.
Signed-off-by: Tony Jones <tonyj@...e.de>
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
Cc: Kay Sievers <kay.sievers@...y.org>
---
Shannon,
Here is some #dma-upstream material. I booted it and verified I could
access all the sysfs parameters.
drivers/dma/dmaengine.c | 46 ++++++++++++++++++++++++---------------------
include/linux/dmaengine.h | 3 ++-
2 files changed, 27 insertions(+), 22 deletions(-)
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 8248992..84257f7 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -41,12 +41,12 @@
* the definition of dma_event_callback in dmaengine.h.
*
* Each device has a kref, which is initialized to 1 when the device is
- * registered. A kref_get is done for each class_device registered. When the
- * class_device is released, the coresponding kref_put is done in the release
+ * registered. A kref_get is done for each device registered. When the
+ * device is released, the coresponding kref_put is done in the release
* method. Every time one of the device's channels is allocated to a client,
* a kref_get occurs. When the channel is freed, the coresponding kref_put
* happens. The device's release function does a completion, so
- * unregister_device does a remove event, class_device_unregister, a kref_put
+ * unregister_device does a remove event, device_unregister, a kref_put
* for the first reference, then waits on the completion for all other
* references to finish.
*
@@ -77,9 +77,10 @@ static LIST_HEAD(dma_client_list);
/* --- sysfs implementation --- */
-static ssize_t show_memcpy_count(struct class_device *cd, char *buf)
+static ssize_t
+show_memcpy_count(struct device *dev, struct device_attribute *attr, char *buf)
{
- struct dma_chan *chan = container_of(cd, struct dma_chan, class_dev);
+ struct dma_chan *chan = to_dma_chan(dev);
unsigned long count = 0;
int i;
@@ -89,9 +90,11 @@ static ssize_t show_memcpy_count(struct class_device *cd, char *buf)
return sprintf(buf, "%lu\n", count);
}
-static ssize_t show_bytes_transferred(struct class_device *cd, char *buf)
+static ssize_t
+show_bytes_transferred(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
- struct dma_chan *chan = container_of(cd, struct dma_chan, class_dev);
+ struct dma_chan *chan = to_dma_chan(dev);
unsigned long count = 0;
int i;
@@ -101,9 +104,10 @@ static ssize_t show_bytes_transferred(struct class_device *cd, char *buf)
return sprintf(buf, "%lu\n", count);
}
-static ssize_t show_in_use(struct class_device *cd, char *buf)
+static ssize_t
+show_in_use(struct device *dev, struct device_attribute *attr, char *buf)
{
- struct dma_chan *chan = container_of(cd, struct dma_chan, class_dev);
+ struct dma_chan *chan = to_dma_chan(dev);
int in_use = 0;
if (unlikely(chan->slow_ref) &&
@@ -119,7 +123,7 @@ static ssize_t show_in_use(struct class_device *cd, char *buf)
return sprintf(buf, "%d\n", in_use);
}
-static struct class_device_attribute dma_class_attrs[] = {
+static struct device_attribute dma_attrs[] = {
__ATTR(memcpy_count, S_IRUGO, show_memcpy_count, NULL),
__ATTR(bytes_transferred, S_IRUGO, show_bytes_transferred, NULL),
__ATTR(in_use, S_IRUGO, show_in_use, NULL),
@@ -128,16 +132,16 @@ static struct class_device_attribute dma_class_attrs[] = {
static void dma_async_device_cleanup(struct kref *kref);
-static void dma_class_dev_release(struct class_device *cd)
+static void dma_dev_release(struct device *dev)
{
- struct dma_chan *chan = container_of(cd, struct dma_chan, class_dev);
+ struct dma_chan *chan = to_dma_chan(dev);
kref_put(&chan->device->refcount, dma_async_device_cleanup);
}
static struct class dma_devclass = {
- .name = "dma",
- .class_dev_attrs = dma_class_attrs,
- .release = dma_class_dev_release,
+ .name = "dma",
+ .dev_attrs = dma_attrs,
+ .dev_release = dma_dev_release,
};
/* --- client and device registration --- */
@@ -384,12 +388,12 @@ int dma_async_device_register(struct dma_device *device)
continue;
chan->chan_id = chancnt++;
- chan->class_dev.class = &dma_devclass;
- chan->class_dev.dev = NULL;
- snprintf(chan->class_dev.class_id, BUS_ID_SIZE, "dma%dchan%d",
+ chan->dev.class = &dma_devclass;
+ chan->dev.parent = NULL;
+ snprintf(chan->dev.bus_id, BUS_ID_SIZE, "dma%dchan%d",
device->dev_id, chan->chan_id);
- rc = class_device_register(&chan->class_dev);
+ rc = device_register(&chan->dev);
if (rc) {
chancnt--;
free_percpu(chan->local);
@@ -416,7 +420,7 @@ err_out:
if (chan->local == NULL)
continue;
kref_put(&device->refcount, dma_async_device_cleanup);
- class_device_unregister(&chan->class_dev);
+ device_unregister(&chan->dev);
chancnt--;
free_percpu(chan->local);
}
@@ -450,7 +454,7 @@ void dma_async_device_unregister(struct dma_device *device)
list_for_each_entry(chan, &device->channels, device_node) {
dma_clients_notify_removed(chan);
- class_device_unregister(&chan->class_dev);
+ device_unregister(&chan->dev);
dma_chan_release(chan);
}
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index a3b6035..55c9a69 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -132,7 +132,7 @@ struct dma_chan {
/* sysfs */
int chan_id;
- struct class_device class_dev;
+ struct device dev;
struct kref refcount;
int slow_ref;
@@ -142,6 +142,7 @@ struct dma_chan {
struct dma_chan_percpu *local;
};
+#define to_dma_chan(p) container_of(p, struct dma_chan, dev)
void dma_chan_cleanup(struct kref *kref);
-
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