linux-kernel - [PATCH V2 1/2] remoteproc: introduce rproc features

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Date:   Tue,  8 Mar 2022 14:48:20 +0800
From:   "Peng Fan (OSS)" <peng.fan@....nxp.com>
To:     bjorn.andersson@...aro.org, mathieu.poirier@...aro.org,
        arnaud.pouliquen@...s.st.com
Cc:     linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        peng.fan@....com
Subject: [PATCH V2 1/2] remoteproc: introduce rproc features

From: Peng Fan <peng.fan@....com>

remote processor may support:
 - firmware recovery with help from main processor
 - self recovery without help from main processor
 - iommu
 - etc

Introduce rproc features could simplify code to avoid adding more bool
flags and let us optimize current code.

Signed-off-by: Peng Fan <peng.fan@....com>
---

V2:
 New

 include/linux/remoteproc.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index 93a1d0050fbc..51edaf80692c 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -417,6 +417,7 @@ struct rproc_ops {
  *			has attached to it
  * @RPROC_DETACHED:	device has been booted by another entity and waiting
  *			for the core to attach to it
+ * @RPROC_CRASHED_ATTACH_RECOVERY: device has crashed and self recovery
  * @RPROC_LAST:		just keep this one at the end
  *
  * Please note that the values of these states are used as indices
@@ -489,6 +490,11 @@ struct rproc_dump_segment {
 	loff_t offset;
 };
 
+enum rproc_features {
+	RPROC_FEAT_ATTACH_RECOVERY = 0,
+	RPROC_MAX_FEATURES = 32,
+};
+
 /**
  * struct rproc - represents a physical remote processor device
  * @node: list node of this rproc object
@@ -530,6 +536,7 @@ struct rproc_dump_segment {
  * @elf_machine: firmware ELF machine
  * @cdev: character device of the rproc
  * @cdev_put_on_release: flag to indicate if remoteproc should be shutdown on @char_dev release
+ * @features: indicate remoteproc features
  */
 struct rproc {
 	struct list_head node;
@@ -570,8 +577,19 @@ struct rproc {
 	u16 elf_machine;
 	struct cdev cdev;
 	bool cdev_put_on_release;
+	DECLARE_BITMAP(features, RPROC_MAX_FEATURES);
 };
 
+static inline bool rproc_has_feature(struct rproc *rproc, unsigned int feature)
+{
+	return test_bit(feature, rproc->features);
+}
+
+static inline void rproc_set_feature(struct rproc *rproc, unsigned int feature)
+{
+	set_bit(feature, rproc->features);
+}
+
 /**
  * struct rproc_subdev - subdevice tied to a remoteproc
  * @node: list node related to the rproc subdevs list
-- 
2.30.0