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authorLoic Pallardy <loic.pallardy@st.com>2018-07-27 16:14:42 +0300
committerBjorn Andersson <bjorn.andersson@linaro.org>2018-10-10 08:39:11 +0300
commitb0019ccd7e90178929ce1afe944ab85d8a39d7a4 (patch)
tree6d6d57e215ecf6ab288c8b26be2b8b1414dc23e2 /drivers/remoteproc
parent15c0b0258e4f1c3c817f34d092d2cc6ff5178bdd (diff)
downloadlinux-b0019ccd7e90178929ce1afe944ab85d8a39d7a4.tar.xz
remoteproc: introduce rproc_find_carveout_by_name function
This patch provides a new function to find a carveout according to a name. If match found, this function returns a pointer on the corresponding carveout (rproc_mem_entry structure). Signed-off-by: Loic Pallardy <loic.pallardy@st.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/remoteproc')
-rw-r--r--drivers/remoteproc/remoteproc_core.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index db771e53f097..800320d06cb8 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -217,6 +217,48 @@ out:
}
EXPORT_SYMBOL(rproc_da_to_va);
+/**
+ * rproc_find_carveout_by_name() - lookup the carveout region by a name
+ * @rproc: handle of a remote processor
+ * @name,..: carveout name to find (standard printf format)
+ *
+ * Platform driver has the capability to register some pre-allacoted carveout
+ * (physically contiguous memory regions) before rproc firmware loading and
+ * associated resource table analysis. These regions may be dedicated memory
+ * regions internal to the coprocessor or specified DDR region with specific
+ * attributes
+ *
+ * This function is a helper function with which we can go over the
+ * allocated carveouts and return associated region characteristics like
+ * coprocessor address, length or processor virtual address.
+ *
+ * Return: a valid pointer on carveout entry on success or NULL on failure.
+ */
+struct rproc_mem_entry *
+rproc_find_carveout_by_name(struct rproc *rproc, const char *name, ...)
+{
+ va_list args;
+ char _name[32];
+ struct rproc_mem_entry *carveout, *mem = NULL;
+
+ if (!name)
+ return NULL;
+
+ va_start(args, name);
+ vsnprintf(_name, sizeof(_name), name, args);
+ va_end(args);
+
+ list_for_each_entry(carveout, &rproc->carveouts, node) {
+ /* Compare carveout and requested names */
+ if (!strcmp(carveout->name, _name)) {
+ mem = carveout;
+ break;
+ }
+ }
+
+ return mem;
+}
+
int rproc_alloc_vring(struct rproc_vdev *rvdev, int i)
{
struct rproc *rproc = rvdev->rproc;