Merge tag 'remoteproc-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc

Pull remoteproc update from Ohad Ben-Cohen:

 - Some refactoring, cleanups and small improvements from Sjur
   Brændeland.  The improvements are mainly about better supporting
   varios virtio properties (such as virtio's config space, status and
   features).  I now see that I messed up while commiting one of Sjur's
   patches and erroneously put myself as the author, as well as letting
   a nasty typo sneak in.  I will not fix this in order to avoid
   rebasing the patches.  Sjur - sorry!

 - A new remoteproc driver for OMAP-L13x (technically a DaVinci
   platform) from Robert Tivy.

 - Extend OMAP support to OMAP5 as well, from Vincent Stehlé.

 - Fix Kconfig VIRTUALIZATION dependency, from Suman Anna (a
   non-critical fix which arrived late during the rc cycle).

* tag 'remoteproc-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc:
  remoteproc: fix kconfig dependencies for VIRTIO
  remoteproc/davinci: add a remoteproc driver for OMAP-L13x DSP
  remoteproc: support default firmware name in rproc_alloc()
  remoteproc/omap: support OMAP5 too
  remoteproc: set vring addresses in resource table
  remoteproc: support virtio config space.
  remoteproc: perserve resource table data
  remoteproc: calculate max_notifyid by counting vrings
  remoteproc: code cleanup of resource parsing
  remoteproc: parse STE-firmware and find resource table address
  remoteproc: add find_loaded_rsc_table firmware ops
  remoteproc: refactor rproc_elf_find_rsc_table()

1 files changed, 64 insertions, 15 deletions

diff --git a/drivers/remoteproc/remoteproc_virtio.c b/drivers/remoteproc/remoteproc_virtio.c
index afed9b7731c4..b09c75c21b60 100644
--- a/drivers/remoteproc/remoteproc_virtio.c
+++ b/drivers/remoteproc/remoteproc_virtio.c
@@ -173,25 +173,35 @@ error:
 	return ret;
 }
 
-/*
- * We don't support yet real virtio status semantics.
- *
- * The plan is to provide this via the VDEV resource entry
- * which is part of the firmware: this way the remote processor
- * will be able to access the status values as set by us.
- */
 static u8 rproc_virtio_get_status(struct virtio_device *vdev)
 {
-	return 0;
+	struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+	struct fw_rsc_vdev *rsc;
+
+	rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+
+	return rsc->status;
 }
 
 static void rproc_virtio_set_status(struct virtio_device *vdev, u8 status)
 {
+	struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+	struct fw_rsc_vdev *rsc;
+
+	rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+
+	rsc->status = status;
 	dev_dbg(&vdev->dev, "status: %d\n", status);
 }
 
 static void rproc_virtio_reset(struct virtio_device *vdev)
 {
+	struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+	struct fw_rsc_vdev *rsc;
+
+	rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+
+	rsc->status = 0;
 	dev_dbg(&vdev->dev, "reset !\n");
 }
 
@@ -199,13 +209,19 @@ static void rproc_virtio_reset(struct virtio_device *vdev)
 static u32 rproc_virtio_get_features(struct virtio_device *vdev)
 {
 	struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+	struct fw_rsc_vdev *rsc;
+
+	rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
 
-	return rvdev->dfeatures;
+	return rsc->dfeatures;
 }
 
 static void rproc_virtio_finalize_features(struct virtio_device *vdev)
 {
 	struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+	struct fw_rsc_vdev *rsc;
+
+	rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
 
 	/* Give virtio_ring a chance to accept features */
 	vring_transport_features(vdev);
@@ -213,13 +229,44 @@ static void rproc_virtio_finalize_features(struct virtio_device *vdev)
 	/*
 	 * Remember the finalized features of our vdev, and provide it
 	 * to the remote processor once it is powered on.
-	 *
-	 * Similarly to the status field, we don't expose yet the negotiated
-	 * features to the remote processors at this point. This will be
-	 * fixed as part of a small resource table overhaul and then an
-	 * extension of the virtio resource entries.
 	 */
-	rvdev->gfeatures = vdev->features[0];
+	rsc->gfeatures = vdev->features[0];
+}
+
+static void rproc_virtio_get(struct virtio_device *vdev, unsigned offset,
+							void *buf, unsigned len)
+{
+	struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+	struct fw_rsc_vdev *rsc;
+	void *cfg;
+
+	rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+	cfg = &rsc->vring[rsc->num_of_vrings];
+
+	if (offset + len > rsc->config_len || offset + len < len) {
+		dev_err(&vdev->dev, "rproc_virtio_get: access out of bounds\n");
+		return;
+	}
+
+	memcpy(buf, cfg + offset, len);
+}
+
+static void rproc_virtio_set(struct virtio_device *vdev, unsigned offset,
+		      const void *buf, unsigned len)
+{
+	struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+	struct fw_rsc_vdev *rsc;
+	void *cfg;
+
+	rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+	cfg = &rsc->vring[rsc->num_of_vrings];
+
+	if (offset + len > rsc->config_len || offset + len < len) {
+		dev_err(&vdev->dev, "rproc_virtio_set: access out of bounds\n");
+		return;
+	}
+
+	memcpy(cfg + offset, buf, len);
 }
 
 static const struct virtio_config_ops rproc_virtio_config_ops = {
@@ -230,6 +277,8 @@ static const struct virtio_config_ops rproc_virtio_config_ops = {
 	.reset		= rproc_virtio_reset,
 	.set_status	= rproc_virtio_set_status,
 	.get_status	= rproc_virtio_get_status,
+	.get		= rproc_virtio_get,
+	.set		= rproc_virtio_set,
 };
 
 /*