#include <linux/rpmsg/qcom_smd.h>
#include <linux/slab.h>
#include <linux/soc/qcom/mdt_loader.h>
+#include <linux/soc/qcom/smem.h>
#include "remoteproc_internal.h"
#include "qcom_common.h"
#define to_smd_subdev(d) container_of(d, struct qcom_rproc_subdev, subdev)
#define to_ssr_subdev(d) container_of(d, struct qcom_rproc_ssr, subdev)
+#define MAX_NUM_OF_SS 10
+#define MAX_REGION_NAME_LENGTH 16
+#define SBL_MINIDUMP_SMEM_ID 602
+#define MD_REGION_VALID ('V' << 24 | 'A' << 16 | 'L' << 8 | 'I' << 0)
+#define MD_SS_ENCR_DONE ('D' << 24 | 'O' << 16 | 'N' << 8 | 'E' << 0)
+#define MD_SS_ENABLED ('E' << 24 | 'N' << 16 | 'B' << 8 | 'L' << 0)
+
+/**
+ * struct minidump_region - Minidump region
+ * @name : Name of the region to be dumped
+ * @seq_num: : Use to differentiate regions with same name.
+ * @valid : This entry to be dumped (if set to 1)
+ * @address : Physical address of region to be dumped
+ * @size : Size of the region
+ */
+struct minidump_region {
+ char name[MAX_REGION_NAME_LENGTH];
+ __le32 seq_num;
+ __le32 valid;
+ __le64 address;
+ __le64 size;
+};
+
+/**
+ * struct minidump_subsystem_toc: Subsystem's SMEM Table of content
+ * @status : Subsystem toc init status
+ * @enabled : if set to 1, this region would be copied during coredump
+ * @encryption_status: Encryption status for this subsystem
+ * @encryption_required : Decides to encrypt the subsystem regions or not
+ * @region_count : Number of regions added in this subsystem toc
+ * @regions_baseptr : regions base pointer of the subsystem
+ */
+struct minidump_subsystem {
+ __le32 status;
+ __le32 enabled;
+ __le32 encryption_status;
+ __le32 encryption_required;
+ __le32 region_count;
+ __le64 regions_baseptr;
+};
+
+/**
+ * struct minidump_global_toc: Global Table of Content
+ * @status : Global Minidump init status
+ * @md_revision : Minidump revision
+ * @enabled : Minidump enable status
+ * @subsystems : Array of subsystems toc
+ */
+struct minidump_global_toc {
+ __le32 status;
+ __le32 md_revision;
+ __le32 enabled;
+ struct minidump_subsystem subsystems[MAX_NUM_OF_SS];
+};
+
struct qcom_ssr_subsystem {
const char *name;
struct srcu_notifier_head notifier_list;
static LIST_HEAD(qcom_ssr_subsystem_list);
static DEFINE_MUTEX(qcom_ssr_subsys_lock);
+static void qcom_minidump_cleanup(struct rproc *rproc)
+{
+ struct rproc_dump_segment *entry, *tmp;
+
+ list_for_each_entry_safe(entry, tmp, &rproc->dump_segments, node) {
+ list_del(&entry->node);
+ kfree(entry->priv);
+ kfree(entry);
+ }
+}
+
+static int qcom_add_minidump_segments(struct rproc *rproc, struct minidump_subsystem *subsystem)
+{
+ struct minidump_region __iomem *ptr;
+ struct minidump_region region;
+ int seg_cnt, i;
+ dma_addr_t da;
+ size_t size;
+ char *name;
+
+ if (WARN_ON(!list_empty(&rproc->dump_segments))) {
+ dev_err(&rproc->dev, "dump segment list already populated\n");
+ return -EUCLEAN;
+ }
+
+ seg_cnt = le32_to_cpu(subsystem->region_count);
+ ptr = ioremap((unsigned long)le64_to_cpu(subsystem->regions_baseptr),
+ seg_cnt * sizeof(struct minidump_region));
+ if (!ptr)
+ return -EFAULT;
+
+ for (i = 0; i < seg_cnt; i++) {
+ memcpy_fromio(®ion, ptr + i, sizeof(region));
+ if (region.valid == MD_REGION_VALID) {
+ name = kstrdup(region.name, GFP_KERNEL);
+ if (!name) {
+ iounmap(ptr);
+ return -ENOMEM;
+ }
+ da = le64_to_cpu(region.address);
+ size = le32_to_cpu(region.size);
+ rproc_coredump_add_custom_segment(rproc, da, size, NULL, name);
+ }
+ }
+
+ iounmap(ptr);
+ return 0;
+}
+
+void qcom_minidump(struct rproc *rproc, unsigned int minidump_id)
+{
+ 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) != MD_SS_ENABLED ||
+ le32_to_cpu(subsystem->encryption_status) != MD_SS_ENCR_DONE) {
+ dev_err(&rproc->dev, "Minidump not ready, skipping\n");
+ return;
+ }
+
+ ret = qcom_add_minidump_segments(rproc, subsystem);
+ if (ret) {
+ dev_err(&rproc->dev, "Failed with error: %d while adding minidump entries\n", ret);
+ goto clean_minidump;
+ }
+ rproc_coredump_using_sections(rproc);
+clean_minidump:
+ qcom_minidump_cleanup(rproc);
+}
+EXPORT_SYMBOL_GPL(qcom_minidump);
+
static int glink_subdev_start(struct rproc_subdev *subdev)
{
struct qcom_rproc_glink *glink = to_glink_subdev(subdev);
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