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Subject[PATCH v4 03/17] remoteproc: add release ops in rproc_mem_entry struct
Date
Memory entry could be allocated in different ways (ioremap,
dma_alloc_coherent, internal RAM allocator...).
This patch introduces a release ops in rproc_mem_entry structure
to associate dedicated release mechanism to each memory entry descriptor
in order to keep remoteproc core generic.

Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
drivers/remoteproc/remoteproc_core.c | 23 +++++++++++++++++++++--
include/linux/remoteproc.h | 5 ++++-
2 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 8e5fe1e..24fe11f 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -600,6 +600,24 @@ static int rproc_handle_devmem(struct rproc *rproc, struct fw_rsc_devmem *rsc,
}

/**
+ * rproc_release_carveout() - release acquired carveout
+ * @rproc: rproc handle
+ * @mem: the memory entry to release
+ *
+ * This function releases specified memory entry @mem allocated via
+ * dma_alloc_coherent() function by @rproc.
+ */
+static int rproc_release_carveout(struct rproc *rproc,
+ struct rproc_mem_entry *mem)
+{
+ struct device *dev = &rproc->dev;
+
+ /* clean up carveout allocations */
+ dma_free_coherent(dev->parent, mem->len, mem->va, mem->dma);
+ return 0;
+}
+
+/**
* rproc_handle_carveout() - handle phys contig memory allocation requests
* @rproc: rproc handle
* @rsc: the resource entry
@@ -733,6 +751,7 @@ static int rproc_handle_carveout(struct rproc *rproc,
carveout->len = rsc->len;
carveout->dma = dma;
carveout->da = rsc->da;
+ carveout->release = rproc_release_carveout;

list_add_tail(&carveout->node, &rproc->carveouts);

@@ -920,8 +939,8 @@ static void rproc_resource_cleanup(struct rproc *rproc)

/* clean up carveout allocations */
list_for_each_entry_safe(entry, tmp, &rproc->carveouts, node) {
- dma_free_coherent(dev->parent, entry->len, entry->va,
- entry->dma);
+ if (entry->release)
+ entry->release(rproc, entry);
list_del(&entry->node);
kfree(entry);
}
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index e3c5d85..bef2e83 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -305,12 +305,15 @@ struct fw_rsc_vdev {
struct fw_rsc_vdev_vring vring[0];
} __packed;

+struct rproc;
+
/**
* struct rproc_mem_entry - memory entry descriptor
* @va: virtual address
* @dma: dma address
* @len: length, in bytes
* @da: device address
+ * @release: release associated memory
* @priv: associated data
* @node: list node
*/
@@ -321,9 +324,9 @@ struct rproc_mem_entry {
u32 da;
void *priv;
struct list_head node;
+ int (*release)(struct rproc *rproc, struct rproc_mem_entry *mem);
};

-struct rproc;
struct firmware;

/**
--
1.9.1
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