On 6/28/2023 9:21 PM, Pavan Kondeti wrote:

On Wed, Jun 28, 2023 at 06:04:40PM +0530, Mukesh Ojha wrote:

quoted

-static int qcom_add_minidump_segments(struct rproc *rproc, struct minidump_subsystem *subsystem,
-			void (*rproc_dumpfn_t)(struct rproc *rproc, struct rproc_dump_segment *segment,
-				void *dest, size_t offset, size_t size))
+void qcom_minidump(struct rproc *rproc, unsigned int minidump_id,
+		void (*rproc_dumpfn_t)(struct rproc *rproc,
+		struct rproc_dump_segment *segment, void *dest, size_t offset,
+		size_t size))
  {
-	struct minidump_region __iomem *ptr;
-	struct minidump_region region;
-	int seg_cnt, i;
  	dma_addr_t da;
  	size_t size;
+	int seg_cnt;
  	char *name;
+	void *ptr;
+	int ret;
+	int i;
  
  	if (WARN_ON(!list_empty(&rproc->dump_segments))) {
  		dev_err(&rproc->dev, "dump segment list already populated\n");
-		return -EUCLEAN;
+		return;
  	}
  
-	seg_cnt = le32_to_cpu(subsystem->region_count);
-	ptr = ioremap((unsigned long)le64_to_cpu(subsystem->regions_baseptr),
-		      seg_cnt * sizeof(struct minidump_region));
+	ptr = qcom_ss_md_mapped_base(minidump_id, &seg_cnt);
  	if (!ptr)
-		return -EFAULT;
+		return;
  
  	for (i = 0; i < seg_cnt; i++) {
-		memcpy_fromio(&region, ptr + i, sizeof(region));
-		if (le32_to_cpu(region.valid) == MINIDUMP_REGION_VALID) {
-			name = kstrndup(region.name, MAX_REGION_NAME_LENGTH - 1, GFP_KERNEL);
-			if (!name) {
-				iounmap(ptr);
-				return -ENOMEM;
-			}
-			da = le64_to_cpu(region.address);
-			size = le64_to_cpu(region.size);
-			rproc_coredump_add_custom_segment(rproc, da, size, rproc_dumpfn_t, name);
+		ret = qcom_ss_valid_segment_info(ptr, i, &name, &da, &size);
+		if (ret < 0) {
+			iounmap(ptr);
+			dev_err(&rproc->dev,
+				"Failed with error: %d while adding minidump entries\n",
+				ret);
+			goto clean_minidump;
  		}
-	}
-
-	iounmap(ptr);
-	return 0;
-}
-
-void qcom_minidump(struct rproc *rproc, unsigned int minidump_id,
-		void (*rproc_dumpfn_t)(struct rproc *rproc,
-		struct rproc_dump_segment *segment, void *dest, size_t offset,
-		size_t size))
-{
-	int ret;
-	struct minidump_subsystem *subsystem;
-	struct minidump_global_toc *toc;
-
-	/* Get Global minidump ToC*/
-	toc = qcom_smem_get(QCOM_SMEM_HOST_ANY, SBL_MINIDUMP_SMEM_ID, NULL);
-
-	/* check if global table pointer exists and init is set */
-	if (IS_ERR(toc) || !toc->status) {
-		dev_err(&rproc->dev, "Minidump TOC not found in SMEM\n");
-		return;
-	}
  
-	/* Get subsystem table of contents using the minidump id */
-	subsystem = &toc->subsystems[minidump_id];
-
-	/**
-	 * Collect minidump if SS ToC is valid and segment table
-	 * is initialized in memory and encryption status is set.
-	 */
-	if (subsystem->regions_baseptr == 0 ||
-	    le32_to_cpu(subsystem->status) != 1 ||
-	    le32_to_cpu(subsystem->enabled) != MINIDUMP_SS_ENABLED ||
-	    le32_to_cpu(subsystem->encryption_status) != MINIDUMP_SS_ENCR_DONE) {
-		dev_err(&rproc->dev, "Minidump not ready, skipping\n");
-		return;
+		/* if it is a valid segment */
+		if (!ret)
+			rproc_coredump_add_custom_segment(rproc, da, size,
+							  rproc_dumpfn_t, name);
  	}
  
-	ret = qcom_add_minidump_segments(rproc, subsystem, rproc_dumpfn_t);
-	if (ret) {
-		dev_err(&rproc->dev, "Failed with error: %d while adding minidump entries\n", ret);
-		goto clean_minidump;
-	}
+	iounmap(ptr);
  	rproc_coredump_using_sections(rproc);
+
  clean_minidump:
  	qcom_minidump_cleanup(rproc);
  }

I like the idea of moving minidump pieces to drivers/soc/qcom/*minidump*.

Is it possible to accept one function callback from remoteproc and do
all of this in one function exported by minidump?

qcom_ss_valid_segment_info() seems a low level function to be exported..

It was ending up with circular dependency due to
rproc_coredump_add_custom_segment()


rproc_coredump => qcom_common => qcom_minidump_smem => rproc_coredump

-Mukesh

Thanks,
Pavan

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