Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/powerpc/include/asm/fadump-internal.h b/arch/powerpc/include/asm/fadump-internal.h
new file mode 100644
index 0000000..c814a2b
--- /dev/null
+++ b/arch/powerpc/include/asm/fadump-internal.h
@@ -0,0 +1,169 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Firmware-Assisted Dump internal code.
+ *
+ * Copyright 2011, Mahesh Salgaonkar, IBM Corporation.
+ * Copyright 2019, Hari Bathini, IBM Corporation.
+ */
+
+#ifndef _ASM_POWERPC_FADUMP_INTERNAL_H
+#define _ASM_POWERPC_FADUMP_INTERNAL_H
+
+/* Maximum number of memory regions kernel supports */
+#define FADUMP_MAX_MEM_REGS 128
+
+#ifndef CONFIG_PRESERVE_FA_DUMP
+
+/* The upper limit percentage for user specified boot memory size (25%) */
+#define MAX_BOOT_MEM_RATIO 4
+
+#define memblock_num_regions(memblock_type) (memblock.memblock_type.cnt)
+
+/* Alignment per CMA requirement. */
+#define FADUMP_CMA_ALIGNMENT (PAGE_SIZE << \
+ max_t(unsigned long, MAX_ORDER - 1, \
+ pageblock_order))
+
+/* FAD commands */
+#define FADUMP_REGISTER 1
+#define FADUMP_UNREGISTER 2
+#define FADUMP_INVALIDATE 3
+
+/*
+ * Copy the ascii values for first 8 characters from a string into u64
+ * variable at their respective indexes.
+ * e.g.
+ * The string "FADMPINF" will be converted into 0x4641444d50494e46
+ */
+static inline u64 fadump_str_to_u64(const char *str)
+{
+ u64 val = 0;
+ int i;
+
+ for (i = 0; i < sizeof(val); i++)
+ val = (*str) ? (val << 8) | *str++ : val << 8;
+ return val;
+}
+
+#define FADUMP_CPU_UNKNOWN (~((u32)0))
+
+#define FADUMP_CRASH_INFO_MAGIC fadump_str_to_u64("FADMPINF")
+
+/* fadump crash info structure */
+struct fadump_crash_info_header {
+ u64 magic_number;
+ u64 elfcorehdr_addr;
+ u32 crashing_cpu;
+ struct pt_regs regs;
+ struct cpumask online_mask;
+};
+
+struct fadump_memory_range {
+ u64 base;
+ u64 size;
+};
+
+/* fadump memory ranges info */
+struct fadump_mrange_info {
+ char name[16];
+ struct fadump_memory_range *mem_ranges;
+ u32 mem_ranges_sz;
+ u32 mem_range_cnt;
+ u32 max_mem_ranges;
+};
+
+/* Platform specific callback functions */
+struct fadump_ops;
+
+/* Firmware-assisted dump configuration details. */
+struct fw_dump {
+ unsigned long reserve_dump_area_start;
+ unsigned long reserve_dump_area_size;
+ /* cmd line option during boot */
+ unsigned long reserve_bootvar;
+
+ unsigned long cpu_state_data_size;
+ u64 cpu_state_dest_vaddr;
+ u32 cpu_state_data_version;
+ u32 cpu_state_entry_size;
+
+ unsigned long hpte_region_size;
+
+ unsigned long boot_memory_size;
+ u64 boot_mem_dest_addr;
+ u64 boot_mem_addr[FADUMP_MAX_MEM_REGS];
+ u64 boot_mem_sz[FADUMP_MAX_MEM_REGS];
+ u64 boot_mem_top;
+ u64 boot_mem_regs_cnt;
+
+ unsigned long fadumphdr_addr;
+ unsigned long cpu_notes_buf_vaddr;
+ unsigned long cpu_notes_buf_size;
+
+ /*
+ * Maximum size supported by firmware to copy from source to
+ * destination address per entry.
+ */
+ u64 max_copy_size;
+ u64 kernel_metadata;
+
+ int ibm_configure_kernel_dump;
+
+ unsigned long fadump_enabled:1;
+ unsigned long fadump_supported:1;
+ unsigned long dump_active:1;
+ unsigned long dump_registered:1;
+ unsigned long nocma:1;
+
+ struct fadump_ops *ops;
+};
+
+struct fadump_ops {
+ u64 (*fadump_init_mem_struct)(struct fw_dump *fadump_conf);
+ u64 (*fadump_get_metadata_size)(void);
+ int (*fadump_setup_metadata)(struct fw_dump *fadump_conf);
+ u64 (*fadump_get_bootmem_min)(void);
+ int (*fadump_register)(struct fw_dump *fadump_conf);
+ int (*fadump_unregister)(struct fw_dump *fadump_conf);
+ int (*fadump_invalidate)(struct fw_dump *fadump_conf);
+ void (*fadump_cleanup)(struct fw_dump *fadump_conf);
+ int (*fadump_process)(struct fw_dump *fadump_conf);
+ void (*fadump_region_show)(struct fw_dump *fadump_conf,
+ struct seq_file *m);
+ void (*fadump_trigger)(struct fadump_crash_info_header *fdh,
+ const char *msg);
+};
+
+/* Helper functions */
+s32 fadump_setup_cpu_notes_buf(u32 num_cpus);
+void fadump_free_cpu_notes_buf(void);
+u32 *fadump_regs_to_elf_notes(u32 *buf, struct pt_regs *regs);
+void fadump_update_elfcore_header(char *bufp);
+bool is_fadump_boot_mem_contiguous(void);
+bool is_fadump_reserved_mem_contiguous(void);
+
+#else /* !CONFIG_PRESERVE_FA_DUMP */
+
+/* Firmware-assisted dump configuration details. */
+struct fw_dump {
+ u64 boot_mem_top;
+ u64 dump_active;
+};
+
+#endif /* CONFIG_PRESERVE_FA_DUMP */
+
+#ifdef CONFIG_PPC_PSERIES
+extern void rtas_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node);
+#else
+static inline void
+rtas_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node) { }
+#endif
+
+#ifdef CONFIG_PPC_POWERNV
+extern void opal_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node);
+#else
+static inline void
+opal_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node) { }
+#endif
+
+#endif /* _ASM_POWERPC_FADUMP_INTERNAL_H */