From 2666ca9197e3d352f43b02d7dfb7c6dd72e7c614 Mon Sep 17 00:00:00 2001 From: Sarangdhar Joshi Date: Fri, 5 Jan 2018 16:04:17 -0800 Subject: remoteproc: Add remote processor coredump support As the remoteproc framework restarts the remote processor after a fatal event, it's useful to be able to acquire a coredump of the remote processor's state, for post mortem debugging. This patch introduces a mechanism for extracting the memory contents after the remote has stopped and before the restart sequence has begun in the recovery path. The remoteproc framework builds the core dump in memory and use devcoredump to expose this to user space. Signed-off-by: Sarangdhar Joshi [bjorn: Use vmalloc instead of composing the ELF on the fly] Signed-off-by: Bjorn Andersson --- include/linux/remoteproc.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'include/linux') diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h index 728d421fffe9..b60c3a31b75d 100644 --- a/include/linux/remoteproc.h +++ b/include/linux/remoteproc.h @@ -394,6 +394,21 @@ enum rproc_crash_type { RPROC_FATAL_ERROR, }; +/** + * struct rproc_dump_segment - segment info from ELF header + * @node: list node related to the rproc segment list + * @da: device address of the segment + * @size: size of the segment + */ +struct rproc_dump_segment { + struct list_head node; + + dma_addr_t da; + size_t size; + + loff_t offset; +}; + /** * struct rproc - represents a physical remote processor device * @node: list node of this rproc object @@ -424,6 +439,7 @@ enum rproc_crash_type { * @cached_table: copy of the resource table * @table_sz: size of @cached_table * @has_iommu: flag to indicate if remote processor is behind an MMU + * @dump_segments: list of segments in the firmware */ struct rproc { struct list_head node; @@ -455,6 +471,7 @@ struct rproc { size_t table_sz; bool has_iommu; bool auto_boot; + struct list_head dump_segments; }; /** @@ -534,6 +551,7 @@ void rproc_free(struct rproc *rproc); int rproc_boot(struct rproc *rproc); void rproc_shutdown(struct rproc *rproc); void rproc_report_crash(struct rproc *rproc, enum rproc_crash_type type); +int rproc_coredump_add_segment(struct rproc *rproc, dma_addr_t da, size_t size); static inline struct rproc_vdev *vdev_to_rvdev(struct virtio_device *vdev) { -- cgit v1.2.3 From c1d35c1ab4242464a0e5953ae69de8aa78156c6c Mon Sep 17 00:00:00 2001 From: Bjorn Andersson Date: Fri, 5 Jan 2018 16:04:18 -0800 Subject: remoteproc: Rename "load_rsc_table" to "parse_fw" The resource table is just one possible source of information that can be extracted from the firmware file. Generalize this interface to allow drivers to override this with parsers of other types of information. Signed-off-by: Bjorn Andersson --- include/linux/remoteproc.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h index b60c3a31b75d..f16864acedad 100644 --- a/include/linux/remoteproc.h +++ b/include/linux/remoteproc.h @@ -344,7 +344,7 @@ struct rproc_ops { int (*stop)(struct rproc *rproc); void (*kick)(struct rproc *rproc, int vqid); void * (*da_to_va)(struct rproc *rproc, u64 da, int len); - int (*load_rsc_table)(struct rproc *rproc, const struct firmware *fw); + int (*parse_fw)(struct rproc *rproc, const struct firmware *fw); struct resource_table *(*find_loaded_rsc_table)( struct rproc *rproc, const struct firmware *fw); int (*load)(struct rproc *rproc, const struct firmware *fw); -- cgit v1.2.3 From 4dd27f544c84c4d079049dd716beee192fcc7e03 Mon Sep 17 00:00:00 2001 From: Bjorn Andersson Date: Fri, 5 Jan 2018 16:04:19 -0800 Subject: soc: qcom: mdt-loader: Return relocation base In order to implement support for grabbing core dumps in remoteproc it's necessary to know the relocated base of the image, as the offsets from the virtual memory base might not be based on the physical address. Return the adjusted physical base address to the caller. Acked-by: Andy Gross Signed-off-by: Bjorn Andersson --- include/linux/soc/qcom/mdt_loader.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/soc/qcom/mdt_loader.h b/include/linux/soc/qcom/mdt_loader.h index bd8e0864b059..5b98bbdabc25 100644 --- a/include/linux/soc/qcom/mdt_loader.h +++ b/include/linux/soc/qcom/mdt_loader.h @@ -14,6 +14,7 @@ struct firmware; ssize_t qcom_mdt_get_size(const struct firmware *fw); int qcom_mdt_load(struct device *dev, const struct firmware *fw, const char *fw_name, int pas_id, void *mem_region, - phys_addr_t mem_phys, size_t mem_size); + phys_addr_t mem_phys, size_t mem_size, + phys_addr_t *reloc_base); #endif -- cgit v1.2.3 From 880f5b388252fedb26c70bb80ad1d7c8abbc0607 Mon Sep 17 00:00:00 2001 From: Bjorn Andersson Date: Mon, 30 Oct 2017 23:11:14 -0700 Subject: remoteproc: Pass type of shutdown to subdev remove remoteproc instances can be stopped either by invoking shutdown or by an attempt to recover from a crash. For some subdev types it's expected to clean up gracefully during a shutdown, but are unable to do so during a crash - so pass this information to the subdev remove functions. Acked-By: Chris Lew Signed-off-by: Bjorn Andersson --- include/linux/remoteproc.h | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h index f16864acedad..d09a9c7af109 100644 --- a/include/linux/remoteproc.h +++ b/include/linux/remoteproc.h @@ -478,13 +478,14 @@ struct rproc { * 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 + * @remove: remove function, called as the rproc is being stopped, the @crashed + * parameter indicates if this originates from the a recovery */ struct rproc_subdev { struct list_head node; int (*probe)(struct rproc_subdev *subdev); - void (*remove)(struct rproc_subdev *subdev); + void (*remove)(struct rproc_subdev *subdev, bool crashed); }; /* we currently support only two vrings per rvdev */ @@ -568,7 +569,7 @@ static inline struct rproc *vdev_to_rproc(struct virtio_device *vdev) void rproc_add_subdev(struct rproc *rproc, struct rproc_subdev *subdev, int (*probe)(struct rproc_subdev *subdev), - void (*remove)(struct rproc_subdev *subdev)); + void (*remove)(struct rproc_subdev *subdev, bool graceful)); void rproc_remove_subdev(struct rproc *rproc, struct rproc_subdev *subdev); -- cgit v1.2.3