From: Sjur Brændeland <sjur.brandeland@stericsson.com>
Date: Thu, 13 Dec 2012 13:01:47 +0000 (+0100)
Subject: remoteproc: Set vring addresses in resource table
X-Git-Tag: next-20130218~3^2~4
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b647e8ade27b8e908e8553130b7bb9b67ba4357a;p=karo-tx-linux.git

remoteproc: Set vring addresses in resource table

Set the vring addresses in the resource table so that
the remote device can read the actual addresses used.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
---

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index dd3bfaf1ad40..c12a385d1c73 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -207,7 +207,6 @@ int rproc_alloc_vring(struct rproc_vdev *rvdev, int i)
 	/*
 	 * Allocate non-cacheable memory for the vring. In the future
 	 * this call will also configure the IOMMU for us
-	 * TODO: let the rproc know the da of this vring
 	 */
 	va = dma_alloc_coherent(dev->parent, size, &dma, GFP_KERNEL);
 	if (!va) {
@@ -218,7 +217,6 @@ int rproc_alloc_vring(struct rproc_vdev *rvdev, int i)
 	/*
 	 * Assign an rproc-wide unique index for this vring
 	 * TODO: assign a notifyid for rvdev updates as well
-	 * TODO: let the rproc know the notifyid of this vring
 	 * TODO: support predefined notifyids (via resource table)
 	 */
 	ret = idr_get_new(&rproc->notifyids, rvring, &notifyid);
@@ -238,6 +236,14 @@ int rproc_alloc_vring(struct rproc_vdev *rvdev, int i)
 	rvring->dma = dma;
 	rvring->notifyid = notifyid;
 
+	/*
+	 * Let the rproc know the notifyid and da of this vring.
+	 * Not all platforms use dma_alloc_coherent to automatically
+	 * set up the iommu. In this case the device address (da) will
+	 * hold the physical address and not the device address.
+	 */
+	rvdev->rsc->vring[i].da = dma;
+	rvdev->rsc->vring[i].notifyid = notifyid;
 	return 0;
 }
 
@@ -365,6 +371,9 @@ static int rproc_handle_vdev(struct rproc *rproc, struct fw_rsc_vdev *rsc,
 	/* remember the device features */
 	rvdev->dfeatures = rsc->dfeatures;
 
+	/* remember the resource entry */
+	rvdev->rsc = rsc;
+
 	list_add_tail(&rvdev->node, &rproc->rvdevs);
 
 	/* it is now safe to add the virtio device */
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index faf33324c78f..cdacd660a60d 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -464,6 +464,7 @@ struct rproc_vring {
  * @vring: the vrings for this vdev
  * @dfeatures: virtio device features
  * @gfeatures: virtio guest features
+ * @rsc: vdev resource entry
  */
 struct rproc_vdev {
 	struct list_head node;
@@ -472,6 +473,7 @@ struct rproc_vdev {
 	struct rproc_vring vring[RVDEV_NUM_VRINGS];
 	unsigned long dfeatures;
 	unsigned long gfeatures;
+	struct fw_rsc_vdev *rsc;
 };
 
 struct rproc *rproc_alloc(struct device *dev, const char *name,