remoteproc: modify vring allocation to rely on centralized carveout allocator

Current version of rproc_alloc_vring function supports only dynamic vring
allocation.

This patch allows to allocate vrings based on memory region declatation.
Vrings are now manage like memory carveouts, to communize memory management
code in rproc_alloc_registered_carveouts().

Allocated buffer is retrieved in rp_find_vq() thanks to
rproc_find_carveout_by_name() functions for.

This patch sets vrings names to vdev"x"vring"y" with x vdev index in
resource table and y vring index in vdev. This will be updated when
name will be associated to vdev in firmware resource table.

Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index d4cabe8da507..8bb0cf0416f1 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -454,6 +454,7 @@ struct rproc_dump_segment {
  * @has_iommu: flag to indicate if remote processor is behind an MMU
  * @auto_boot: flag to indicate if remote processor should be auto-started
  * @dump_segments: list of segments in the firmware
+ * @nb_vdev: number of vdev currently handled by rproc
  */
 struct rproc {
 	struct list_head node;
@@ -486,6 +487,7 @@ struct rproc {
 	bool has_iommu;
 	bool auto_boot;
 	struct list_head dump_segments;
+	int nb_vdev;
 };
 
 /**
@@ -513,7 +515,6 @@ struct rproc_subdev {
 /**
  * struct rproc_vring - remoteproc vring state
  * @va:	virtual address
- * @dma: dma address
  * @len: length, in bytes
  * @da: device address
  * @align: vring alignment
@@ -523,7 +524,6 @@ struct rproc_subdev {
  */
 struct rproc_vring {
 	void *va;
-	dma_addr_t dma;
 	int len;
 	u32 da;
 	u32 align;
@@ -542,6 +542,7 @@ struct rproc_vring {
  * @vdev: the virio device
  * @vring: the vrings for this vdev
  * @rsc_offset: offset of the vdev's resource entry
+ * @index: vdev position versus other vdev declared in resource table
  */
 struct rproc_vdev {
 	struct kref refcount;
@@ -554,6 +555,7 @@ struct rproc_vdev {
 	struct virtio_device vdev;
 	struct rproc_vring vring[RVDEV_NUM_VRINGS];
 	u32 rsc_offset;
+	u32 index;
 };
 
 struct rproc *rproc_get_by_phandle(phandle phandle);