talos-op-linux/include/linux/remoteproc.h, branch v4.13.16

remoteproc: Drop firmware_loading_complete

2017-01-30T22:18:54+00:00

firmware_loading_complete is used to synchronize operations on rproc while asynchronous firmware loading is in progress. However, rproc_boot() no longer waits on firmware_loading_complete. Hence drop this completion variable altogether and handle the race between rproc_del() and rproc_boot() using new state RPROC_DELETED. The request_firmware_nowait() will hold the reference to rproc device by using a get_device()/put_device(), so the rproc struct will remain valid even when we return from rproc_del() before the asynchronous call to rproc_fw_config_virtio() completes. CC: Loic Pallardy CC: Bjorn Andersson Signed-off-by: Sarangdhar Joshi Signed-off-by: Bjorn Andersson

remoteproc: Add RPROC_DELETED state

2017-01-30T22:18:52+00:00

Add new state RPROC_DELETED to handle synchronization between rproc_del() and other operations on rproc. This state represents the rproc device that has been "deleted". CC: Loic Pallardy CC: Bjorn Andersson Signed-off-by: Sarangdhar Joshi Signed-off-by: Bjorn Andersson

Revert "remoteproc: Merge table_ptr and cached_table pointers"

2016-12-30T11:26:31+00:00

Following any fw_rsc_vdev entries in the resource table are two variable length arrays, the first one reference vring resources and the second one is the virtio config space. The virtio config space is used by virtio to communicate status and configuration changes and must as such be shared with the remote. The reverted commit incorrectly made any changes to the virtio config space only affect the local copy, in an attempt to allowing memory protection of the shared resource table. This reverts commit cda8529346935fc86f476999ac4fbfe4e17abf11. Signed-off-by: Bjorn Andersson

remoteproc: Merge table_ptr and cached_table pointers

2016-11-15T05:52:18+00:00

As all vdev resources are allocated before we boot the remote processor we no longer need to support modifying the resource table while the remote is running. This saves us from the table_ptr dance, but more importantly allow the remote processor to enable security lock down of the loaded table memory region. Signed-off-by: Bjorn Andersson

remoteproc: Decouple vdev resources and devices

2016-11-15T05:52:17+00:00

Represent the virtio device part of the vdev resources as remoteproc subdevices to finalize the decoupling of the virtio resource and device handling. Signed-off-by: Bjorn Andersson

remoteproc: Assign kref to rproc_vdev

2016-11-15T05:52:15+00:00

No functional change Signed-off-by: Bjorn Andersson

remoteproc: Introduce subdevices

2016-11-10T05:17:08+00:00

A subdevice is an abstract entity that can be used to tie actions to the booting and shutting down of a remote processor. The subdevice object is expected to be embedded in concrete implementations, allowing for a variety of use cases to be implemented. Signed-off-by: Bjorn Andersson

remoteproc: Keep local copy of firmware name

2016-10-18T22:03:35+00:00

Storage of the firmware name was inconsistent, either storing a pointer to a name stored with unknown ownership, or a variable length tacked onto the end of the struct proc allocated in rproc_alloc. In preparation for allowing the firmware of an already allocated struct rproc to be changed, instead always keep a locally maintained copy of the firmware name. Signed-off-by: Matt Redfearn Signed-off-by: Bjorn Andersson

remoteproc: Split driver and consumer dereferencing

2016-10-03T05:50:21+00:00

In order to be able to lock a rproc driver implementations only when used by a client, we must differ between the dereference operation of a client and the implementation itself. This patch brings no functional change. Signed-off-by: Bjorn Andersson

remoteproc: core: transform struct fw_rsc_vdev_vring reserved field in pa

2016-09-06T18:06:40+00:00

In current implementation, struct fw_rsc_vdev_vring which describes vring resource in firmware resource table owns only device address, because it assumes that host is responsible of vring allocation and only device address is needed by coprocessor. But if vrings need to be fixed in system memory map for any reasons (security, SoC charactieristics...), physical address is needed exatly identified the memory chunck by host. For that let's transform reserved field of struct fw_rsc_vdev_vring to pa (physical address). Signed-off-by: Loic Pallardy Signed-off-by: Bjorn Andersson