Merge tag 'rproc-v4.10' of git://github.com/andersson/remoteproc

Pull remoteproc updates from Bjorn Andersson:

 - introduce remoteproc "subdevice" support, which allows remoteproc
   driver to associate devices to the "running" state of the remoteproc,
   allowing devices to be probed and removed as the remote processor is
   booted, shut down or recovering from a crash.

 - handling of virtio device resources was improved, vring memory is now
   allocated as part of other memory allocation. This ensures that all
   vrings for all virtio devices are allocated before we boot the remote
   processor.

 - the debugfs mechanism for starting and stopping remoteproc instances
   was replaced with a sysfs interface, also providing a mechanism for
   specifying firmware to use by the instance. This allows user space to
   load and boot use case specific firmware on remote processors.

 - new drivers for the ST Slimcore and Qualcomm Hexagon DSP as well as
   removal of the unused StE modem loader.

 - finally support for crash recovery in the Qualcomm Wirelss subsystem
   (used for WiFi/BT/FM on a number of platforms) and a number of bug
   fixes and cleanups

* tag 'rproc-v4.10' of git://github.com/andersson/remoteproc: (49 commits)
  remoteproc: qcom_adsp_pil: select qcom_scm
  remoteproc: Drop wait in __rproc_boot()
  remoteproc/ste: Delete unused driver
  remoteproc: Remove "experimental" warning
  remoteproc: qcom_adsp_pil: select qcom_scm
  dt-binding: soc: qcom: smd: Add label property
  remoteproc: qcom: mdt_loader: add include for sizes
  remoteproc: Update last rproc_put users to rproc_free
  remoteproc: qcom: adsp: Add missing MODULE_DEVICE_TABLE
  remoteproc: wcnss-pil: add QCOM_SMD dependency
  dmaengine: st_fdma: Revert: "Revert: Update st_fdma to 'depends on REMOTEPROC'"
  remoteproc: Add support for xo clock
  remoteproc: adsp-pil: fix recursive dependency
  remoteproc: Introduce Qualcomm ADSP PIL
  dt-binding: remoteproc: Introduce ADSP loader binding
  remoteproc: qcom_wcnss: Fix circular module dependency
  remoteproc: Merge table_ptr and cached_table pointers
  remoteproc: Remove custom vdev handler list
  remoteproc: Update max_notifyid as we allocate vrings
  remoteproc: Decouple vdev resources and devices
  ...

1 files changed, 32 insertions, 4 deletions

diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index 930023b7c825..e2f3a3281d8f 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -400,6 +400,7 @@ enum rproc_crash_type {
  * @firmware_loading_complete: marks e/o asynchronous firmware loading
  * @bootaddr: address of first instruction to boot rproc with (optional)
  * @rvdevs: list of remote virtio devices
+ * @subdevs: list of subdevices, to following the running state
  * @notifyids: idr for dynamically assigning rproc-wide unique notify ids
  * @index: index of this rproc device
  * @crash_handler: workqueue for handling a crash
@@ -407,15 +408,14 @@ enum rproc_crash_type {
  * @crash_comp: completion used to sync crash handler and the rproc reload
  * @recovery_disabled: flag that state if recovery was disabled
  * @max_notifyid: largest allocated notify id.
- * @table_ptr: pointer to the resource table in effect
- * @cached_table: copy of the resource table
+ * @table_ptr: our copy of the resource table
  * @has_iommu: flag to indicate if remote processor is behind an MMU
  */
 struct rproc {
 	struct list_head node;
 	struct iommu_domain *domain;
 	const char *name;
-	const char *firmware;
+	char *firmware;
 	void *priv;
 	const struct rproc_ops *ops;
 	struct device dev;
@@ -431,6 +431,7 @@ struct rproc {
 	struct completion firmware_loading_complete;
 	u32 bootaddr;
 	struct list_head rvdevs;
+	struct list_head subdevs;
 	struct idr notifyids;
 	int index;
 	struct work_struct crash_handler;
@@ -439,11 +440,23 @@ struct rproc {
 	bool recovery_disabled;
 	int max_notifyid;
 	struct resource_table *table_ptr;
-	struct resource_table *cached_table;
 	bool has_iommu;
 	bool auto_boot;
 };
 
+/**
+ * struct rproc_subdev - subdevice tied to a remoteproc
+ * @node: list node related to the rproc subdevs list
+ * @probe: probe function, called as the rproc is started
+ * @remove: remove function, called as the rproc is stopped
+ */
+struct rproc_subdev {
+	struct list_head node;
+
+	int (*probe)(struct rproc_subdev *subdev);
+	void (*remove)(struct rproc_subdev *subdev);
+};
+
 /* we currently support only two vrings per rvdev */
 
 #define RVDEV_NUM_VRINGS 2
@@ -472,6 +485,9 @@ struct rproc_vring {
 
 /**
  * struct rproc_vdev - remoteproc state for a supported virtio device
+ * @refcount: reference counter for the vdev and vring allocations
+ * @subdev: handle for registering the vdev as a rproc subdevice
+ * @id: virtio device id (as in virtio_ids.h)
  * @node: list node
  * @rproc: the rproc handle
  * @vdev: the virio device
@@ -479,6 +495,11 @@ struct rproc_vring {
  * @rsc_offset: offset of the vdev's resource entry
  */
 struct rproc_vdev {
+	struct kref refcount;
+
+	struct rproc_subdev subdev;
+
+	unsigned int id;
 	struct list_head node;
 	struct rproc *rproc;
 	struct virtio_device vdev;
@@ -511,4 +532,11 @@ static inline struct rproc *vdev_to_rproc(struct virtio_device *vdev)
 	return rvdev->rproc;
 }
 
+void rproc_add_subdev(struct rproc *rproc,
+		      struct rproc_subdev *subdev,
+		      int (*probe)(struct rproc_subdev *subdev),
+		      void (*remove)(struct rproc_subdev *subdev));
+
+void rproc_remove_subdev(struct rproc *rproc, struct rproc_subdev *subdev);
+
 #endif /* REMOTEPROC_H */