@@ -278,4 +278,17 @@ config QCOM_RPROC_MINIDUMP
query predefined Minidump segments associated with the remote processor
and check its validity and end up collecting the dump on remote processor
crash during its recovery.
+
+config QCOM_MINIDUMP
+ tristate "QCOM APSS Minidump driver"
+ depends on ARCH_QCOM || COMPILE_TEST
+ depends on QCOM_SMEM
+ help
+ This config enables Linux core infrastructure for Application
+ processor subsystem (APSS) Minidump collection, i.e., it enables
+ Linux client drivers to register their internal data structures
+ and debug messages as part of the APSS Minidump table and when
+ the SoC has crashed, these selective regions will be dumped
+ instead of the entire RAM dump. This saves a significant amount
+ of time and/or storage space.
endmenu
@@ -36,3 +36,4 @@ obj-$(CONFIG_QCOM_ICC_BWMON) += icc-bwmon.o
qcom_ice-objs += ice.o
obj-$(CONFIG_QCOM_INLINE_CRYPTO_ENGINE) += qcom_ice.o
obj-$(CONFIG_QCOM_RPROC_MINIDUMP) += qcom_rproc_minidump.o
+obj-$(CONFIG_QCOM_MINIDUMP) += qcom_minidump.o
new file mode 100644
@@ -0,0 +1,606 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/device.h>
+#include <linux/elf.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/export.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/printk.h>
+#include <linux/soc/qcom/smem.h>
+#include <linux/string.h>
+#include <soc/qcom/qcom_minidump.h>
+
+#include "qcom_minidump_internal.h"
+
+/**
+ * struct minidump_ss_data - Minidump subsystem private data
+ * @md_ss_toc: Application Subsystem TOC pointer
+ * @md_regions: Application Subsystem region base pointer
+ */
+struct minidump_ss_data {
+ struct minidump_subsystem *md_ss_toc;
+ struct minidump_region *md_regions;
+};
+
+/**
+ * struct minidump_elfhdr - Minidump table elf header
+ * @ehdr: elf main header
+ * @shdr: Section header
+ * @phdr: Program header
+ * @elf_offset: Section offset in elf
+ * @strtable_idx: String table current index position
+ */
+struct minidump_elfhdr {
+ struct elfhdr *ehdr;
+ struct elf_shdr *shdr;
+ struct elf_phdr *phdr;
+ size_t elf_offset;
+ size_t strtable_idx;
+};
+
+/**
+ * struct minidump - Minidump driver data information
+ * @elf: Minidump elf header
+ * @dev: Minidump backend device
+ * @apss_data: APSS driver data
+ * @md_lock: Lock to protect access to APSS minidump table
+ */
+struct minidump {
+ struct minidump_elfhdr elf;
+ struct device *dev;
+ struct minidump_ss_data *apss_data;
+ struct mutex md_lock;
+};
+
+/*
+ * In some of the Old Qualcomm devices, boot firmware statically allocates 300
+ * as total number of supported region (including all co-processors) in
+ * minidump table out of which linux was using 201. In future, this limitation
+ * from boot firmware might get removed by allocating the region dynamically.
+ * So, keep it compatible with older devices, we can keep the current limit for
+ * Linux to 201.
+ */
+#define MAX_NUM_ENTRIES 201
+#define MAX_STRTBL_SIZE (MAX_NUM_ENTRIES * MAX_REGION_NAME_LENGTH)
+
+static struct elf_shdr *elf_shdr_entry_addr(struct elfhdr *ehdr, int idx)
+{
+ struct elf_shdr *eshdr = (struct elf_shdr *)((size_t)ehdr + ehdr->e_shoff);
+
+ return &eshdr[idx];
+}
+
+static struct elf_phdr *elf_phdr_entry_addr(struct elfhdr *ehdr, int idx)
+{
+ struct elf_phdr *ephdr = (struct elf_phdr *)((size_t)ehdr + ehdr->e_phoff);
+
+ return &ephdr[idx];
+}
+
+static char *elf_str_table_start(struct elfhdr *ehdr)
+{
+ struct elf_shdr *eshdr;
+
+ if (ehdr->e_shstrndx == SHN_UNDEF)
+ return NULL;
+
+ eshdr = elf_shdr_entry_addr(ehdr, ehdr->e_shstrndx);
+
+ return (char *)ehdr + eshdr->sh_offset;
+}
+
+static char *elf_lookup_string(struct minidump *md, struct elfhdr *ehdr, int offset)
+{
+ char *strtab = elf_str_table_start(ehdr);
+
+ if (!strtab || (md->elf.strtable_idx < offset))
+ return NULL;
+
+ return strtab + offset;
+}
+
+static unsigned int append_str_to_strtable(struct minidump *md, const char *name)
+{
+ char *strtab = elf_str_table_start(md->elf.ehdr);
+ unsigned int old_idx = md->elf.strtable_idx;
+ unsigned int ret;
+
+ if (!strtab || !name)
+ return 0;
+
+ ret = old_idx;
+ old_idx += strscpy((strtab + old_idx), name, MAX_REGION_NAME_LENGTH);
+ md->elf.strtable_idx = old_idx + 1;
+
+ return ret;
+}
+
+static int qcom_md_clear_elfheader(struct minidump *md,
+ const struct qcom_minidump_region *region)
+{
+ struct elfhdr *ehdr = md->elf.ehdr;
+ struct elf_shdr *shdr;
+ struct elf_shdr *tmp_shdr;
+ struct elf_phdr *phdr;
+ struct elf_phdr *tmp_phdr;
+ unsigned int phidx;
+ unsigned int shidx;
+ unsigned int len;
+ unsigned int i;
+ char *shname;
+
+ for (i = 0; i < ehdr->e_phnum; i++) {
+ phdr = elf_phdr_entry_addr(ehdr, i);
+ if (phdr->p_paddr == region->phys_addr &&
+ phdr->p_memsz == region->size)
+ break;
+ }
+
+ if (i == ehdr->e_phnum) {
+ dev_err(md->dev, "Cannot find program header entry in elf\n");
+ return -EINVAL;
+ }
+
+ phidx = i;
+ for (i = 0; i < ehdr->e_shnum; i++) {
+ shdr = elf_shdr_entry_addr(ehdr, i);
+ shname = elf_lookup_string(md, ehdr, shdr->sh_name);
+ if (shname && !strcmp(shname, region->name) &&
+ shdr->sh_addr == (elf_addr_t)region->virt_addr &&
+ shdr->sh_size == region->size)
+ break;
+ }
+
+ if (i == ehdr->e_shnum) {
+ dev_err(md->dev, "Cannot find section header entry in elf\n");
+ return -EINVAL;
+ }
+
+ shidx = i;
+ if (shdr->sh_offset != phdr->p_offset) {
+ dev_err(md->dev, "Invalid entry details for region: %s\n", region->name);
+ return -EINVAL;
+ }
+
+ /* Clear name in string table */
+ len = strlen(shname) + 1;
+ memmove(shname, shname + len, md->elf.strtable_idx - shdr->sh_name - len);
+ md->elf.strtable_idx -= len;
+
+ /* Clear program header */
+ tmp_phdr = elf_phdr_entry_addr(ehdr, phidx);
+ for (i = phidx; i < ehdr->e_phnum - 1; i++) {
+ tmp_phdr = elf_phdr_entry_addr(ehdr, i + 1);
+ phdr = elf_phdr_entry_addr(ehdr, i);
+ memcpy(phdr, tmp_phdr, sizeof(*phdr));
+ phdr->p_offset = phdr->p_offset - region->size;
+ }
+ memset(tmp_phdr, 0, sizeof(*tmp_phdr));
+ ehdr->e_phnum--;
+
+ /* Clear section header */
+ tmp_shdr = elf_shdr_entry_addr(ehdr, shidx);
+ for (i = shidx; i < ehdr->e_shnum - 1; i++) {
+ tmp_shdr = elf_shdr_entry_addr(ehdr, i + 1);
+ shdr = elf_shdr_entry_addr(ehdr, i);
+ memcpy(shdr, tmp_shdr, sizeof(*shdr));
+ shdr->sh_offset -= region->size;
+ shdr->sh_name -= len;
+ }
+
+ memset(tmp_shdr, 0, sizeof(*tmp_shdr));
+ ehdr->e_shnum--;
+ md->elf.elf_offset -= region->size;
+
+ return 0;
+}
+
+static void qcom_md_update_elfheader(struct minidump *md,
+ const struct qcom_minidump_region *region)
+{
+ struct elfhdr *ehdr = md->elf.ehdr;
+ struct elf_shdr *shdr;
+ struct elf_phdr *phdr;
+
+ shdr = elf_shdr_entry_addr(ehdr, ehdr->e_shnum++);
+ phdr = elf_phdr_entry_addr(ehdr, ehdr->e_phnum++);
+
+ shdr->sh_type = SHT_PROGBITS;
+ shdr->sh_name = append_str_to_strtable(md, region->name);
+ shdr->sh_addr = (elf_addr_t)region->virt_addr;
+ shdr->sh_size = region->size;
+ shdr->sh_flags = SHF_WRITE;
+ shdr->sh_offset = md->elf.elf_offset;
+ shdr->sh_entsize = 0;
+
+ phdr->p_type = PT_LOAD;
+ phdr->p_offset = md->elf.elf_offset;
+ phdr->p_vaddr = (elf_addr_t)region->virt_addr;
+ phdr->p_paddr = region->phys_addr;
+ phdr->p_filesz = phdr->p_memsz = region->size;
+ phdr->p_flags = PF_R | PF_W;
+ md->elf.elf_offset += shdr->sh_size;
+}
+
+static void qcom_md_add_region(struct minidump_ss_data *mdss_data,
+ const struct qcom_minidump_region *region)
+{
+ struct minidump_subsystem *mdss_toc = mdss_data->md_ss_toc;
+ struct minidump_region *mdr;
+ unsigned int region_cnt;
+
+ region_cnt = le32_to_cpu(mdss_toc->region_count);
+ mdr = &mdss_data->md_regions[region_cnt];
+ strscpy(mdr->name, region->name, sizeof(mdr->name));
+ mdr->address = cpu_to_le64(region->phys_addr);
+ mdr->size = cpu_to_le64(region->size);
+ mdr->valid = cpu_to_le32(MINIDUMP_REGION_VALID);
+ region_cnt++;
+ mdss_toc->region_count = cpu_to_le32(region_cnt);
+}
+
+static int qcom_md_get_region_index(struct minidump_ss_data *mdss_data,
+ const struct qcom_minidump_region *region)
+{
+ struct minidump_subsystem *mdss_toc = mdss_data->md_ss_toc;
+ struct minidump_region *mdr;
+ unsigned int i;
+ unsigned int count;
+
+ count = le32_to_cpu(mdss_toc->region_count);
+ for (i = 0; i < count; i++) {
+ mdr = &mdss_data->md_regions[i];
+ if (!strcmp(mdr->name, region->name))
+ return i;
+ }
+
+ return -ENOENT;
+}
+
+static int qcom_md_region_unregister(struct minidump *md,
+ const struct qcom_minidump_region *region)
+{
+ struct minidump_ss_data *mdss_data = md->apss_data;
+ struct minidump_subsystem *mdss_toc = mdss_data->md_ss_toc;
+ struct minidump_region *mdr;
+ unsigned int region_cnt;
+ unsigned int idx;
+ int ret;
+
+ ret = qcom_md_get_region_index(mdss_data, region);
+ if (ret < 0) {
+ dev_err(md->dev, "%s region is not present\n", region->name);
+ return ret;
+ }
+
+ idx = ret;
+ mdr = &mdss_data->md_regions[0];
+ region_cnt = le32_to_cpu(mdss_toc->region_count);
+ /*
+ * Left shift all the regions exist after this removed region
+ * index by 1 to fill the gap and zero out the last region
+ * present at the end.
+ */
+ memmove(&mdr[idx], &mdr[idx + 1], (region_cnt - idx - 1) * sizeof(*mdr));
+ memset(&mdr[region_cnt - 1], 0, sizeof(*mdr));
+ region_cnt--;
+ mdss_toc->region_count = cpu_to_le32(region_cnt);
+
+ return 0;
+}
+
+static int qcom_md_region_register(struct minidump *md,
+ const struct qcom_minidump_region *region)
+{
+ struct minidump_ss_data *mdss_data = md->apss_data;
+ struct minidump_subsystem *mdss_toc = mdss_data->md_ss_toc;
+ unsigned int num_region;
+ int ret;
+
+ ret = qcom_md_get_region_index(mdss_data, region);
+ if (ret >= 0) {
+ dev_info(md->dev, "%s region is already registered\n", region->name);
+ return -EEXIST;
+ }
+
+ /* Check if there is a room for a new entry */
+ num_region = le32_to_cpu(mdss_toc->region_count);
+ if (num_region >= MAX_NUM_ENTRIES) {
+ dev_err(md->dev, "maximum region limit %u reached\n", num_region);
+ return -ENOSPC;
+ }
+
+ qcom_md_add_region(mdss_data, region);
+
+ return 0;
+}
+
+static bool qcom_minidump_valid_region(const struct qcom_minidump_region *region)
+{
+ return region &&
+ strnlen(region->name, MAX_NAME_LENGTH) < MAX_NAME_LENGTH &&
+ region->virt_addr &&
+ region->size &&
+ IS_ALIGNED(region->size, 4);
+}
+
+/**
+ * qcom_minidump_region_register() - Register region in APSS Minidump table.
+ * @region: minidump region.
+ *
+ * Return: On success, it returns 0 and negative error value on failure.
+ */
+static int qcom_minidump_region_register(const struct qcom_minidump_region *region)
+{
+ struct minidump *md;
+ int ret;
+
+ md = qcom_smem_minidump_ready();
+ if (!md)
+ return -EPROBE_DEFER;
+
+ if (!qcom_minidump_valid_region(region))
+ return -EINVAL;
+
+ mutex_lock(&md->md_lock);
+ ret = qcom_md_region_register(md, region);
+ if (ret)
+ goto unlock;
+
+ qcom_md_update_elfheader(md, region);
+unlock:
+ mutex_unlock(&md->md_lock);
+ return ret;
+}
+
+/**
+ * qcom_minidump_region_unregister() - Unregister region from APSS Minidump table.
+ * @region: minidump region.
+ *
+ * Return: On success, it returns 0 and negative error value on failure.
+ */
+static int qcom_minidump_region_unregister(const struct qcom_minidump_region *region)
+{
+ struct minidump *md;
+ int ret;
+
+ md = qcom_smem_minidump_ready();
+ if (!md)
+ return -EPROBE_DEFER;
+
+ if (!qcom_minidump_valid_region(region))
+ return -EINVAL;
+
+ mutex_lock(&md->md_lock);
+ ret = qcom_md_region_unregister(md, region);
+ if (ret)
+ goto unlock;
+
+ ret = qcom_md_clear_elfheader(md, region);
+unlock:
+ mutex_unlock(&md->md_lock);
+ return ret;
+}
+
+static int qcom_md_add_elfheader(struct minidump *md)
+{
+ struct qcom_minidump_region elfregion;
+ struct elfhdr *ehdr;
+ struct elf_shdr *shdr;
+ struct elf_phdr *phdr;
+ unsigned int elfh_size;
+ unsigned int strtbl_off;
+ unsigned int phdr_off;
+ unsigned int banner_len;
+ char *banner;
+
+ banner_len = strlen(linux_banner);
+ /*
+ * Header buffer contains:
+ * ELF header, (MAX_NUM_ENTRIES + 4) of Section and Program ELF headers,
+ * where, 4 additional entries, one for empty header, one for string table
+ * one for minidump table and one for linux banner.
+ *
+ * Linux banner is stored in minidump to aid post mortem tools to determine
+ * the kernel version.
+ */
+ elfh_size = sizeof(*ehdr);
+ elfh_size += MAX_STRTBL_SIZE;
+ elfh_size += banner_len + 1;
+ elfh_size += ((sizeof(*shdr) + sizeof(*phdr)) * (MAX_NUM_ENTRIES + 4));
+ elfh_size = ALIGN(elfh_size, 4);
+
+ md->elf.ehdr = devm_kzalloc(md->dev, elfh_size, GFP_KERNEL);
+ if (!md->elf.ehdr)
+ return -ENOMEM;
+
+ ehdr = md->elf.ehdr;
+ /* Assign Section/Program headers offset */
+ md->elf.shdr = shdr = (struct elf_shdr *)(ehdr + 1);
+ md->elf.phdr = phdr = (struct elf_phdr *)(shdr + MAX_NUM_ENTRIES);
+ phdr_off = sizeof(*ehdr) + (sizeof(*shdr) * MAX_NUM_ENTRIES);
+
+ memcpy(ehdr->e_ident, ELFMAG, SELFMAG);
+ ehdr->e_ident[EI_CLASS] = ELF_CLASS;
+ ehdr->e_ident[EI_DATA] = ELF_DATA;
+ ehdr->e_ident[EI_VERSION] = EV_CURRENT;
+ ehdr->e_ident[EI_OSABI] = ELF_OSABI;
+ ehdr->e_type = ET_CORE;
+ ehdr->e_machine = ELF_ARCH;
+ ehdr->e_version = EV_CURRENT;
+ ehdr->e_ehsize = sizeof(*ehdr);
+ ehdr->e_phoff = phdr_off;
+ ehdr->e_phentsize = sizeof(*phdr);
+ ehdr->e_shoff = sizeof(*ehdr);
+ ehdr->e_shentsize = sizeof(*shdr);
+ ehdr->e_shstrndx = 1;
+
+ md->elf.elf_offset = elfh_size;
+ /*
+ * The zeroth index of the section header is reserved and is rarely used.
+ * Set the section header as null (SHN_UNDEF) and move to the next one.
+ * 2nd Section is String table.
+ */
+ md->elf.strtable_idx = 1;
+ strtbl_off = sizeof(*ehdr) + ((sizeof(*phdr) + sizeof(*shdr)) * MAX_NUM_ENTRIES);
+ shdr++;
+ shdr->sh_type = SHT_STRTAB;
+ shdr->sh_offset = (elf_addr_t)strtbl_off;
+ shdr->sh_size = MAX_STRTBL_SIZE;
+ shdr->sh_entsize = 0;
+ shdr->sh_flags = 0;
+ shdr->sh_name = append_str_to_strtable(md, "STR_TBL");
+ shdr++;
+
+ /* 3rd Section is Linux banner */
+ banner = (char *)ehdr + strtbl_off + MAX_STRTBL_SIZE;
+ memcpy(banner, linux_banner, banner_len);
+
+ shdr->sh_type = SHT_PROGBITS;
+ shdr->sh_offset = (elf_addr_t)(strtbl_off + MAX_STRTBL_SIZE);
+ shdr->sh_size = banner_len + 1;
+ shdr->sh_addr = (elf_addr_t)linux_banner;
+ shdr->sh_entsize = 0;
+ shdr->sh_flags = SHF_WRITE;
+ shdr->sh_name = append_str_to_strtable(md, "linux_banner");
+
+ phdr->p_type = PT_LOAD;
+ phdr->p_offset = (elf_addr_t)(strtbl_off + MAX_STRTBL_SIZE);
+ phdr->p_vaddr = (elf_addr_t)linux_banner;
+ phdr->p_paddr = virt_to_phys(linux_banner);
+ phdr->p_filesz = phdr->p_memsz = banner_len + 1;
+ phdr->p_flags = PF_R | PF_W;
+
+ /*
+ * Above are some prdefined sections/program header used
+ * for debug, update their count here.
+ */
+ ehdr->e_phnum = 1;
+ ehdr->e_shnum = 3;
+
+ /* Register ELF header as first region */
+ strscpy(elfregion.name, "KELF_HEADER", sizeof(elfregion.name));
+ elfregion.virt_addr = md->elf.ehdr;
+ elfregion.phys_addr = virt_to_phys(md->elf.ehdr);
+ elfregion.size = elfh_size;
+
+ return qcom_md_region_register(md, &elfregion);
+}
+
+static int qcom_apss_md_table_init(struct minidump *md,
+ struct minidump_subsystem *mdss_toc)
+{
+ struct minidump_ss_data *mdss_data;
+
+ mdss_data = devm_kzalloc(md->dev, sizeof(*mdss_data), GFP_KERNEL);
+ if (!mdss_data)
+ return -ENOMEM;
+
+ mdss_data->md_ss_toc = mdss_toc;
+ mdss_data->md_regions = devm_kcalloc(md->dev, MAX_NUM_ENTRIES,
+ sizeof(*mdss_data->md_regions),
+ GFP_KERNEL);
+ if (!mdss_data->md_regions)
+ return -ENOMEM;
+
+ mdss_toc = mdss_data->md_ss_toc;
+ mdss_toc->regions_baseptr = cpu_to_le64(virt_to_phys(mdss_data->md_regions));
+ mdss_toc->enabled = cpu_to_le32(MINIDUMP_SS_ENABLED);
+ mdss_toc->status = cpu_to_le32(1);
+ mdss_toc->region_count = cpu_to_le32(0);
+
+ /* Tell bootloader not to encrypt the regions of this subsystem */
+ mdss_toc->encryption_status = cpu_to_le32(MINIDUMP_SS_ENCR_DONE);
+ mdss_toc->encryption_required = cpu_to_le32(MINIDUMP_SS_ENCR_NOTREQ);
+
+ md->apss_data = mdss_data;
+
+ return 0;
+}
+
+static void qcom_apss_md_table_exit(struct minidump_ss_data *mdss_data)
+{
+ memset(mdss_data->md_ss_toc, cpu_to_le32(0), sizeof(*mdss_data->md_ss_toc));
+}
+
+static int qcom_apss_minidump_probe(struct platform_device *pdev)
+{
+ struct minidump_global_toc *mdgtoc;
+ struct minidump *md;
+ size_t size;
+ int ret;
+
+ md = devm_kzalloc(&pdev->dev, sizeof(*md), GFP_KERNEL);
+ if (!md)
+ return -ENOMEM;
+
+ md->dev = &pdev->dev;
+ mdgtoc = qcom_smem_get(QCOM_SMEM_HOST_ANY, SBL_MINIDUMP_SMEM_ID, &size);
+ if (IS_ERR(mdgtoc)) {
+ ret = PTR_ERR(mdgtoc);
+ return dev_err_probe(md->dev, ret,
+ "Couldn't find minidump smem item\n");
+ }
+
+ if (size < sizeof(*mdgtoc) || !mdgtoc->status) {
+ ret = -EINVAL;
+ return dev_err_probe(md->dev, ret,
+ "minidump table is not initialized\n");
+ }
+
+ mutex_init(&md->md_lock);
+ ret = qcom_apss_md_table_init(md, &mdgtoc->subsystems[MINIDUMP_APSS_DESC]);
+ if (ret)
+ return dev_err_probe(md->dev, ret,
+ "apss minidump initialization failed\n");
+
+ /* First entry would be ELF header */
+ ret = qcom_md_add_elfheader(md);
+ if (ret) {
+ qcom_apss_md_table_exit(md->apss_data);
+ return dev_err_probe(md->dev, ret, "Failed to add elf header\n");
+ }
+
+ platform_set_drvdata(pdev, md);
+
+ return ret;
+}
+
+static void qcom_apss_minidump_remove(struct platform_device *pdev)
+{
+ struct minidump *md = platform_get_drvdata(pdev);
+
+ qcom_apss_md_table_exit(md->apss_data);
+}
+
+static const struct platform_device_id qcom_minidump_id_table[] = {
+ { .name = "qcom_minidump_smem" },
+ {}
+};
+MODULE_DEVICE_TABLE(platform, qcom_minidump_id_table);
+
+static struct platform_driver qcom_minidump_driver = {
+ .probe = qcom_apss_minidump_probe,
+ .remove_new = qcom_apss_minidump_remove,
+ .driver = {
+ .name = "qcom_minidump_smem",
+ },
+ .id_table = qcom_minidump_id_table,
+};
+
+module_platform_driver(qcom_minidump_driver);
+
+MODULE_DESCRIPTION("Qualcomm APSS minidump driver");
+MODULE_LICENSE("GPL");
@@ -9,10 +9,20 @@
#define MAX_NUM_OF_SS 10
#define MAX_REGION_NAME_LENGTH 16
#define SBL_MINIDUMP_SMEM_ID 602
+
#define MINIDUMP_REGION_VALID ('V' << 24 | 'A' << 16 | 'L' << 8 | 'I' << 0)
+#define MINIDUMP_REGION_INVALID ('I' << 24 | 'N' << 16 | 'V' << 8 | 'A' << 0)
+#define MINIDUMP_REGION_INIT ('I' << 24 | 'N' << 16 | 'I' << 8 | 'T' << 0)
+#define MINIDUMP_REGION_NOINIT 0
+
+#define MINIDUMP_SS_ENCR_REQ (0 << 24 | 'Y' << 16 | 'E' << 8 | 'S' << 0)
+#define MINIDUMP_SS_ENCR_NOTREQ (0 << 24 | 0 << 16 | 'N' << 8 | 'R' << 0)
+#define MINIDUMP_SS_ENCR_START ('S' << 24 | 'T' << 16 | 'R' << 8 | 'T' << 0)
#define MINIDUMP_SS_ENCR_DONE ('D' << 24 | 'O' << 16 | 'N' << 8 | 'E' << 0)
#define MINIDUMP_SS_ENABLED ('E' << 24 | 'N' << 16 | 'B' << 8 | 'L' << 0)
+#define MINIDUMP_APSS_DESC 0
+
/**
* struct minidump_region - Minidump region
* @name : Name of the region to be dumped
@@ -270,6 +270,7 @@ struct smem_region {
* @partitions: list of partitions of current processor/host
* @item_count: max accepted item number
* @socinfo: platform device pointer
+ * @minidump: minidump platform device pointer
* @num_regions: number of @regions
* @regions: list of the memory regions defining the shared memory
*/
@@ -280,6 +281,7 @@ struct qcom_smem {
u32 item_count;
struct platform_device *socinfo;
+ struct platform_device *minidump;
struct smem_ptable *ptable;
struct smem_partition global_partition;
struct smem_partition partitions[SMEM_HOST_COUNT];
@@ -795,6 +797,15 @@ int qcom_smem_get_soc_id(u32 *id)
}
EXPORT_SYMBOL_GPL(qcom_smem_get_soc_id);
+void *qcom_smem_minidump_ready(void)
+{
+ if (__smem && __smem->minidump)
+ return platform_get_drvdata(__smem->minidump);
+ else
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(qcom_smem_minidump_ready);
+
static int qcom_smem_get_sbl_version(struct qcom_smem *smem)
{
struct smem_header *header;
@@ -1173,11 +1184,20 @@ static int qcom_smem_probe(struct platform_device *pdev)
if (IS_ERR(smem->socinfo))
dev_dbg(&pdev->dev, "failed to register socinfo device\n");
+ smem->minidump = platform_device_register_data(&pdev->dev, "qcom_minidump_smem",
+ PLATFORM_DEVID_NONE, NULL,
+ 0);
+ if (IS_ERR(smem->minidump)) {
+ dev_dbg(&pdev->dev, "failed to register minidump device\n");
+ smem->minidump = NULL;
+ }
+
return 0;
}
static void qcom_smem_remove(struct platform_device *pdev)
{
+ platform_device_unregister(__smem->minidump);
platform_device_unregister(__smem->socinfo);
hwspin_lock_free(__smem->hwlock);
@@ -14,4 +14,6 @@ phys_addr_t qcom_smem_virt_to_phys(void *p);
int qcom_smem_get_soc_id(u32 *id);
+void *qcom_smem_minidump_ready(void);
+
#endif
@@ -6,6 +6,24 @@
#ifndef _QCOM_MINIDUMP_H_
#define _QCOM_MINIDUMP_H_
+#define MAX_NAME_LENGTH 12
+
+/**
+ * struct qcom_minidump_region - APSS Minidump region information
+ *
+ * @name: Entry name, Minidump will dump binary with this name.
+ * @virt_addr: Virtual address of the entry.
+ * @phys_addr: Physical address of the entry to dump.
+ * @size: Number of byte to dump from @address location,
+ * and it should be 4 byte aligned.
+ */
+struct qcom_minidump_region {
+ char name[MAX_NAME_LENGTH];
+ void *virt_addr;
+ phys_addr_t phys_addr;
+ size_t size;
+};
+
struct rproc;
struct rproc_dump_segment;