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Date: Thu, 16 Apr 2020 18:13:16 +0200
From: Arnaud Pouliquen <arnaud.pouliquen@...com>
To: Bjorn Andersson <bjorn.andersson@...aro.org>,
Ohad Ben-Cohen <ohad@...ery.com>,
Mathieu Poirier <mathieu.poirier@...aro.org>
CC: <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-stm32@...md-mailman.stormreply.com>,
<arnaud.pouliquen@...com>
Subject: [RFC 03/18] remoteproc: Move rvdev management in rproc_virtio
Migrate the management of the rvdev device and subdev from core
to virtio, to prepare the rpmsg virtio platform device creation.
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@...com>
---
drivers/remoteproc/remoteproc_core.c | 118 +-------------------
drivers/remoteproc/remoteproc_internal.h | 5 +-
drivers/remoteproc/remoteproc_virtio.c | 136 +++++++++++++++++++++--
3 files changed, 131 insertions(+), 128 deletions(-)
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 5c90d569c0f7..4fcd685cbfd8 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -371,8 +371,7 @@ int rproc_alloc_vring(struct rproc_vdev *rvdev, int i)
return 0;
}
-static int
-rproc_parse_vring(struct rproc_vdev *rvdev, struct fw_rsc_vdev *rsc, int i)
+int rproc_parse_vring(struct rproc_vdev *rvdev, struct fw_rsc_vdev *rsc, int i)
{
struct rproc *rproc = rvdev->rproc;
struct device *dev = &rproc->dev;
@@ -410,117 +409,6 @@ void rproc_free_vring(struct rproc_vring *rvring)
rsc->vring[idx].notifyid = -1;
}
-static int rproc_vdev_do_start(struct rproc_subdev *subdev)
-{
- struct rproc_vdev *rvdev = container_of(subdev, struct rproc_vdev, subdev);
-
- return rproc_add_virtio_dev(rvdev, rvdev->id);
-}
-
-static void rproc_vdev_do_stop(struct rproc_subdev *subdev, bool crashed)
-{
- struct rproc_vdev *rvdev = container_of(subdev, struct rproc_vdev, subdev);
- int ret;
-
- ret = device_for_each_child(&rvdev->dev, NULL, rproc_remove_virtio_dev);
- if (ret)
- dev_warn(&rvdev->dev, "can't remove vdev child device: %d\n", ret);
-}
-
-/**
- * rproc_rvdev_release() - release the existence of a rvdev
- *
- * @dev: the subdevice's dev
- */
-static void rproc_rvdev_release(struct device *dev)
-{
- struct rproc_vdev *rvdev = container_of(dev, struct rproc_vdev, dev);
-
- of_reserved_mem_device_release(dev);
-
- kfree(rvdev);
-}
-
-static int rproc_rvdev_add_device(struct rproc_vdev *rvdev)
-{
- struct rproc *rproc = rvdev->rproc;
- struct fw_rsc_vdev *rsc = rvdev->rsc;
- char name[16];
- int ret, i;
-
- /* Initialise vdev subdevice */
- snprintf(name, sizeof(name), "vdev%dbuffer", rvdev->index);
- rvdev->dev.parent = &rproc->dev;
- rvdev->dev.dma_pfn_offset = rproc->dev.parent->dma_pfn_offset;
- rvdev->dev.release = rproc_rvdev_release;
- dev_set_name(&rvdev->dev, "%s#%s", dev_name(rvdev->dev.parent), name);
- dev_set_drvdata(&rvdev->dev, rvdev);
-
- ret = device_register(&rvdev->dev);
- if (ret) {
- put_device(&rvdev->dev);
- return ret;
- }
- /* Make device dma capable by inheriting from parent's capabilities */
- set_dma_ops(&rvdev->dev, get_dma_ops(rproc->dev.parent));
-
- ret = dma_coerce_mask_and_coherent(&rvdev->dev,
- dma_get_mask(rproc->dev.parent));
- if (ret) {
- dev_warn(&rvdev->dev,
- "Failed to set DMA mask %llx. Trying to continue... %x\n",
- dma_get_mask(rproc->dev.parent), ret);
- }
-
- /* parse the vrings */
- for (i = 0; i < rsc->num_of_vrings; i++) {
- ret = rproc_parse_vring(rvdev, rsc, i);
- if (ret)
- goto free_rvdev;
- }
-
- /* allocate the vring resources */
- for (i = 0; i < rsc->num_of_vrings; i++) {
- ret = rproc_alloc_vring(rvdev, i);
- if (ret)
- goto free_vg;
- }
-
- rvdev->subdev.start = rproc_vdev_do_start;
- rvdev->subdev.stop = rproc_vdev_do_stop;
-
- rproc_add_subdev(rproc, &rvdev->subdev);
-
- return 0;
-
-free_vg:
- for (i--; i >= 0; i--) {
- struct rproc_vring *rvring = &rvdev->vring[i];
-
- rproc_free_vring(rvring);
- }
-
-free_rvdev:
- device_unregister(&rvdev->dev);
-
- return ret;
-}
-
-static void rproc_rvdev_remove_device(struct rproc_vdev *rvdev)
-{
- struct rproc *rproc = rvdev->rproc;
- struct rproc_vring *rvring;
- int id;
-
- for (id = 0; id < ARRAY_SIZE(rvdev->vring); id++) {
- rvring = &rvdev->vring[id];
- rproc_free_vring(rvring);
- }
-
- rproc_remove_subdev(rproc, &rvdev->subdev);
- device_unregister(&rvdev->dev);
-}
-
/**
* rproc_handle_vdev() - handle a vdev fw resource
* @rproc: the remote processor
@@ -590,14 +478,14 @@ static int rproc_handle_vdev(struct rproc *rproc, struct fw_rsc_vdev *rsc,
list_add_tail(&rvdev->node, &rproc->rvdevs);
- return rproc_rvdev_add_device(rvdev);
+ return rproc_virtio_device_add(rvdev);
}
void rproc_vdev_release(struct kref *ref)
{
struct rproc_vdev *rvdev = container_of(ref, struct rproc_vdev, refcount);
- rproc_rvdev_remove_device(rvdev);
+ rproc_virtio_device_remove(rvdev);
list_del(&rvdev->node);
}
diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
index 493ef9262411..fad95f1a50c1 100644
--- a/drivers/remoteproc/remoteproc_internal.h
+++ b/drivers/remoteproc/remoteproc_internal.h
@@ -30,8 +30,8 @@ irqreturn_t rproc_vq_interrupt(struct rproc *rproc, int vq_id);
void rproc_vdev_release(struct kref *ref);
/* from remoteproc_virtio.c */
-int rproc_add_virtio_dev(struct rproc_vdev *rvdev, int id);
-int rproc_remove_virtio_dev(struct device *dev, void *data);
+int rproc_virtio_device_add(struct rproc_vdev *rvdev);
+void rproc_virtio_device_remove(struct rproc_vdev *rvdev);
/* from remoteproc_debugfs.c */
void rproc_remove_trace_file(struct dentry *tfile);
@@ -47,6 +47,7 @@ extern struct class rproc_class;
int rproc_init_sysfs(void);
void rproc_exit_sysfs(void);
+int rproc_parse_vring(struct rproc_vdev *rvdev, struct fw_rsc_vdev *rsc, int i);
void rproc_free_vring(struct rproc_vring *rvring);
int rproc_alloc_vring(struct rproc_vdev *rvdev, int i);
diff --git a/drivers/remoteproc/remoteproc_virtio.c b/drivers/remoteproc/remoteproc_virtio.c
index 8c07cb2ca8ba..0f7efac7d4f3 100644
--- a/drivers/remoteproc/remoteproc_virtio.c
+++ b/drivers/remoteproc/remoteproc_virtio.c
@@ -296,6 +296,20 @@ static const struct virtio_config_ops rproc_virtio_config_ops = {
.set = rproc_virtio_set,
};
+/**
+ * rproc_rvdev_release() - release the existence of a rvdev
+ *
+ * @dev: the subdevice's dev
+ */
+static void rproc_virtio_rvdev_release(struct device *dev)
+{
+ struct rproc_vdev *rvdev = container_of(dev, struct rproc_vdev, dev);
+
+ of_reserved_mem_device_release(dev);
+
+ kfree(rvdev);
+}
+
/*
* This function is called whenever vdev is released, and is responsible
* to decrement the remote processor's refcount which was taken when vdev was
@@ -318,16 +332,18 @@ static void rproc_virtio_dev_release(struct device *dev)
}
/**
- * rproc_add_virtio_dev() - register an rproc-induced virtio device
- * @rvdev: the remote vdev
+ * rproc_vdev_start() - register an rproc-induced virtio device
+ * @subdev: the rproc virtio subdevice
*
* This function registers a virtio device. This vdev's partent is
* the rproc device.
*
* Returns 0 on success or an appropriate error value otherwise.
*/
-int rproc_add_virtio_dev(struct rproc_vdev *rvdev, int id)
+static int rproc_vitio_start(struct rproc_subdev *subdev)
{
+ struct rproc_vdev *rvdev = container_of(subdev, struct rproc_vdev,
+ subdev);
struct rproc *rproc = rvdev->rproc;
struct device *dev = &rvdev->dev;
struct virtio_device *vdev;
@@ -376,7 +392,7 @@ int rproc_add_virtio_dev(struct rproc_vdev *rvdev, int id)
ret = -ENOMEM;
goto out;
}
- vdev->id.device = id,
+ vdev->id.device = rvdev->id,
vdev->config = &rproc_virtio_config_ops,
vdev->dev.parent = dev;
vdev->dev.release = rproc_virtio_dev_release;
@@ -401,23 +417,121 @@ int rproc_add_virtio_dev(struct rproc_vdev *rvdev, int id)
goto out;
}
- dev_info(dev, "registered %s (type %d)\n", dev_name(&vdev->dev), id);
+ dev_info(dev, "registered %s (type %d)\n", dev_name(&vdev->dev),
+ rvdev->id);
out:
return ret;
}
+static int rproc_remove_virtio_dev(struct device *dev, void *data)
+{
+ struct virtio_device *vdev = dev_to_virtio(dev);
+ struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+ struct rproc_vring *rvring;
+ int id;
+
+ unregister_virtio_device(vdev);
+
+ for (id = 0; id < ARRAY_SIZE(rvdev->vring); id++) {
+ rvring = &rvdev->vring[id];
+ rproc_free_vring(rvring);
+ }
+
+ return 0;
+}
/**
* rproc_remove_virtio_dev() - remove an rproc-induced virtio device
- * @dev: the virtio device
- * @data: must be null
+ * @subdev: the rproc virtio subdevice
+ * @crashed: indicate if the stop is the result of a crash
*
- * This function unregisters an existing virtio device.
+ * This function unregisters existing virtio devices.
*/
-int rproc_remove_virtio_dev(struct device *dev, void *data)
+static void rproc_vitio_stop(struct rproc_subdev *subdev, bool crashed)
{
- struct virtio_device *vdev = dev_to_virtio(dev);
+ struct rproc_vdev *rvdev = container_of(subdev, struct rproc_vdev,
+ subdev);
+ int ret;
+
+ ret = device_for_each_child(&rvdev->dev, NULL, rproc_remove_virtio_dev);
+ if (ret)
+ dev_warn(&rvdev->dev, "can't remove vdev child device: %d\n",
+ ret);
+}
+
+static const struct rproc_subdev rproc_virtio_subdev = {
+ .start = rproc_vitio_start,
+ .stop = rproc_vitio_stop
+};
+
+int rproc_virtio_device_add(struct rproc_vdev *rvdev)
+{
+ struct rproc *rproc = rvdev->rproc;
+ struct fw_rsc_vdev *rsc = rvdev->rsc;
+ char name[16];
+ int ret, i;
+
+ /* Initialise vdev subdevice */
+ snprintf(name, sizeof(name), "vdev%dbuffer", rvdev->index);
+ rvdev->dev.parent = &rproc->dev;
+ rvdev->dev.dma_pfn_offset = rproc->dev.parent->dma_pfn_offset;
+ rvdev->dev.release = rproc_virtio_rvdev_release;
+ dev_set_name(&rvdev->dev, "%s#%s", dev_name(rvdev->dev.parent), name);
+ dev_set_drvdata(&rvdev->dev, rvdev);
+
+ ret = device_register(&rvdev->dev);
+ if (ret) {
+ put_device(&rvdev->dev);
+ return ret;
+ }
+ /* Make device dma capable by inheriting from parent's capabilities */
+ set_dma_ops(&rvdev->dev, get_dma_ops(rproc->dev.parent));
+
+ ret = dma_coerce_mask_and_coherent(&rvdev->dev,
+ dma_get_mask(rproc->dev.parent));
+ if (ret) {
+ dev_warn(&rvdev->dev,
+ "Failed to set DMA mask %llx. Trying to continue... %x\n",
+ dma_get_mask(rproc->dev.parent), ret);
+ }
+
+ /* parse the vrings */
+ for (i = 0; i < rsc->num_of_vrings; i++) {
+ ret = rproc_parse_vring(rvdev, rsc, i);
+ if (ret)
+ goto free_rvdev;
+ }
+
+ /* allocate the vring resources */
+ for (i = 0; i < rsc->num_of_vrings; i++) {
+ ret = rproc_alloc_vring(rvdev, i);
+ if (ret)
+ goto free_vg;
+ }
+
+ rvdev->subdev = rproc_virtio_subdev;
+
+ rproc_add_subdev(rproc, &rvdev->subdev);
- unregister_virtio_device(vdev);
return 0;
+
+free_vg:
+ for (i--; i >= 0; i--) {
+ struct rproc_vring *rvring = &rvdev->vring[i];
+
+ rproc_free_vring(rvring);
+ }
+
+free_rvdev:
+ device_unregister(&rvdev->dev);
+
+ return ret;
+}
+
+void rproc_virtio_device_remove(struct rproc_vdev *rvdev)
+{
+ struct rproc *rproc = rvdev->rproc;
+
+ rproc_remove_subdev(rproc, &rvdev->subdev);
+ device_unregister(&rvdev->dev);
}
--
2.17.1
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