powerpc/fadump: move rtas specific definitions to platform code

Currently, FADump is only supported on pSeries but that is going to
change soon with FADump support being added on PowerNV platform. So,
move rtas specific definitions to platform code to allow FADump
to have multiple platforms support.

Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/156821328494.5656.16219929140866195511.stgit@hbathini.in.ibm.com

1 files changed, 49 insertions, 47 deletions

diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
index 994fc09e9cbf..03f2708cd954 100644
--- a/arch/powerpc/kernel/fadump.c
+++ b/arch/powerpc/kernel/fadump.c
@@ -33,12 +33,11 @@
 #include <asm/fadump-internal.h>
 #include <asm/setup.h>
 
+#include "../platforms/pseries/rtas-fadump.h"
+
 static struct fw_dump fw_dump;
-static struct fadump_mem_struct fdm;
-static const struct fadump_mem_struct *fdm_active;
-#ifdef CONFIG_CMA
-static struct cma *fadump_cma;
-#endif
+static struct rtas_fadump_mem_struct fdm;
+static const struct rtas_fadump_mem_struct *fdm_active;
 
 static DEFINE_MUTEX(fadump_mutex);
 struct fad_crash_memory_ranges *crash_memory_ranges;
@@ -47,6 +46,8 @@ int crash_mem_ranges;
 int max_crash_mem_ranges;
 
 #ifdef CONFIG_CMA
+static struct cma *fadump_cma;
+
 /*
  * fadump_cma_init() - Initialize CMA area from a fadump reserved memory
  *
@@ -156,11 +157,11 @@ int __init early_init_dt_scan_fw_dump(unsigned long node,
 		u32 type = (u32)of_read_number(sections, 1);
 
 		switch (type) {
-		case FADUMP_CPU_STATE_DATA:
+		case RTAS_FADUMP_CPU_STATE_DATA:
 			fw_dump.cpu_state_data_size =
 					of_read_ulong(&sections[1], 2);
 			break;
-		case FADUMP_HPTE_REGION:
+		case RTAS_FADUMP_HPTE_REGION:
 			fw_dump.hpte_region_size =
 					of_read_ulong(&sections[1], 2);
 			break;
@@ -271,20 +272,20 @@ static void fadump_show_config(void)
 	pr_debug("Boot memory size  : %lx\n", fw_dump.boot_memory_size);
 }
 
-static unsigned long init_fadump_mem_struct(struct fadump_mem_struct *fdm,
+static unsigned long init_fadump_mem_struct(struct rtas_fadump_mem_struct *fdm,
 				unsigned long addr)
 {
 	if (!fdm)
 		return 0;
 
-	memset(fdm, 0, sizeof(struct fadump_mem_struct));
+	memset(fdm, 0, sizeof(struct rtas_fadump_mem_struct));
 	addr = addr & PAGE_MASK;
 
 	fdm->header.dump_format_version = cpu_to_be32(0x00000001);
 	fdm->header.dump_num_sections = cpu_to_be16(3);
 	fdm->header.dump_status_flag = 0;
 	fdm->header.offset_first_dump_section =
-		cpu_to_be32((u32)offsetof(struct fadump_mem_struct, cpu_state_data));
+		cpu_to_be32((u32)offsetof(struct rtas_fadump_mem_struct, cpu_state_data));
 
 	/*
 	 * Fields for disk dump option.
@@ -300,24 +301,24 @@ static unsigned long init_fadump_mem_struct(struct fadump_mem_struct *fdm,
 
 	/* Kernel dump sections */
 	/* cpu state data section. */
-	fdm->cpu_state_data.request_flag = cpu_to_be32(FADUMP_REQUEST_FLAG);
-	fdm->cpu_state_data.source_data_type = cpu_to_be16(FADUMP_CPU_STATE_DATA);
+	fdm->cpu_state_data.request_flag = cpu_to_be32(RTAS_FADUMP_REQUEST_FLAG);
+	fdm->cpu_state_data.source_data_type = cpu_to_be16(RTAS_FADUMP_CPU_STATE_DATA);
 	fdm->cpu_state_data.source_address = 0;
 	fdm->cpu_state_data.source_len = cpu_to_be64(fw_dump.cpu_state_data_size);
 	fdm->cpu_state_data.destination_address = cpu_to_be64(addr);
 	addr += fw_dump.cpu_state_data_size;
 
 	/* hpte region section */
-	fdm->hpte_region.request_flag = cpu_to_be32(FADUMP_REQUEST_FLAG);
-	fdm->hpte_region.source_data_type = cpu_to_be16(FADUMP_HPTE_REGION);
+	fdm->hpte_region.request_flag = cpu_to_be32(RTAS_FADUMP_REQUEST_FLAG);
+	fdm->hpte_region.source_data_type = cpu_to_be16(RTAS_FADUMP_HPTE_REGION);
 	fdm->hpte_region.source_address = 0;
 	fdm->hpte_region.source_len = cpu_to_be64(fw_dump.hpte_region_size);
 	fdm->hpte_region.destination_address = cpu_to_be64(addr);
 	addr += fw_dump.hpte_region_size;
 
 	/* RMA region section */
-	fdm->rmr_region.request_flag = cpu_to_be32(FADUMP_REQUEST_FLAG);
-	fdm->rmr_region.source_data_type = cpu_to_be16(FADUMP_REAL_MODE_REGION);
+	fdm->rmr_region.request_flag = cpu_to_be32(RTAS_FADUMP_REQUEST_FLAG);
+	fdm->rmr_region.source_data_type = cpu_to_be16(RTAS_FADUMP_REAL_MODE_REGION);
 	fdm->rmr_region.source_address = cpu_to_be64(RMA_START);
 	fdm->rmr_region.source_len = cpu_to_be64(fw_dump.boot_memory_size);
 	fdm->rmr_region.destination_address = cpu_to_be64(addr);
@@ -588,7 +589,7 @@ static int __init early_fadump_reserve_mem(char *p)
 }
 early_param("fadump_reserve_mem", early_fadump_reserve_mem);
 
-static int register_fw_dump(struct fadump_mem_struct *fdm)
+static int register_fw_dump(struct rtas_fadump_mem_struct *fdm)
 {
 	int rc, err;
 	unsigned int wait_time;
@@ -599,7 +600,7 @@ static int register_fw_dump(struct fadump_mem_struct *fdm)
 	do {
 		rc = rtas_call(fw_dump.ibm_configure_kernel_dump, 3, 1, NULL,
 			FADUMP_REGISTER, fdm,
-			sizeof(struct fadump_mem_struct));
+			sizeof(struct rtas_fadump_mem_struct));
 
 		wait_time = rtas_busy_delay_time(rc);
 		if (wait_time)
@@ -695,7 +696,7 @@ static inline int fadump_gpr_index(u64 id)
 	int i = -1;
 	char str[3];
 
-	if ((id & GPR_MASK) == REG_ID("GPR")) {
+	if ((id & GPR_MASK) == fadump_str_to_u64("GPR")) {
 		/* get the digits at the end */
 		id &= ~GPR_MASK;
 		id >>= 24;
@@ -717,30 +718,30 @@ static inline void fadump_set_regval(struct pt_regs *regs, u64 reg_id,
 	i = fadump_gpr_index(reg_id);
 	if (i >= 0)
 		regs->gpr[i] = (unsigned long)reg_val;
-	else if (reg_id == REG_ID("NIA"))
+	else if (reg_id == fadump_str_to_u64("NIA"))
 		regs->nip = (unsigned long)reg_val;
-	else if (reg_id == REG_ID("MSR"))
+	else if (reg_id == fadump_str_to_u64("MSR"))
 		regs->msr = (unsigned long)reg_val;
-	else if (reg_id == REG_ID("CTR"))
+	else if (reg_id == fadump_str_to_u64("CTR"))
 		regs->ctr = (unsigned long)reg_val;
-	else if (reg_id == REG_ID("LR"))
+	else if (reg_id == fadump_str_to_u64("LR"))
 		regs->link = (unsigned long)reg_val;
-	else if (reg_id == REG_ID("XER"))
+	else if (reg_id == fadump_str_to_u64("XER"))
 		regs->xer = (unsigned long)reg_val;
-	else if (reg_id == REG_ID("CR"))
+	else if (reg_id == fadump_str_to_u64("CR"))
 		regs->ccr = (unsigned long)reg_val;
-	else if (reg_id == REG_ID("DAR"))
+	else if (reg_id == fadump_str_to_u64("DAR"))
 		regs->dar = (unsigned long)reg_val;
-	else if (reg_id == REG_ID("DSISR"))
+	else if (reg_id == fadump_str_to_u64("DSISR"))
 		regs->dsisr = (unsigned long)reg_val;
 }
 
-static struct fadump_reg_entry*
-fadump_read_registers(struct fadump_reg_entry *reg_entry, struct pt_regs *regs)
+static struct rtas_fadump_reg_entry*
+fadump_read_registers(struct rtas_fadump_reg_entry *reg_entry, struct pt_regs *regs)
 {
 	memset(regs, 0, sizeof(struct pt_regs));
 
-	while (be64_to_cpu(reg_entry->reg_id) != REG_ID("CPUEND")) {
+	while (be64_to_cpu(reg_entry->reg_id) != fadump_str_to_u64("CPUEND")) {
 		fadump_set_regval(regs, be64_to_cpu(reg_entry->reg_id),
 					be64_to_cpu(reg_entry->reg_value));
 		reg_entry++;
@@ -850,10 +851,10 @@ void fadump_free_cpu_notes_buf(void)
  * state from fadump crash info structure populated by first kernel at the
  * time of crash.
  */
-static int __init fadump_build_cpu_notes(const struct fadump_mem_struct *fdm)
+static int __init fadump_build_cpu_notes(const struct rtas_fadump_mem_struct *fdm)
 {
-	struct fadump_reg_save_area_header *reg_header;
-	struct fadump_reg_entry *reg_entry;
+	struct rtas_fadump_reg_save_area_header *reg_header;
+	struct rtas_fadump_reg_entry *reg_entry;
 	struct fadump_crash_info_header *fdh = NULL;
 	void *vaddr;
 	unsigned long addr;
@@ -868,7 +869,8 @@ static int __init fadump_build_cpu_notes(const struct fadump_mem_struct *fdm)
 	vaddr = __va(addr);
 
 	reg_header = vaddr;
-	if (be64_to_cpu(reg_header->magic_number) != REGSAVE_AREA_MAGIC) {
+	if (be64_to_cpu(reg_header->magic_number) !=
+	    fadump_str_to_u64("REGSAVE")) {
 		printk(KERN_ERR "Unable to read register save area.\n");
 		return -ENOENT;
 	}
@@ -880,7 +882,7 @@ static int __init fadump_build_cpu_notes(const struct fadump_mem_struct *fdm)
 	num_cpus = be32_to_cpu(*((__be32 *)(vaddr)));
 	pr_debug("NumCpus     : %u\n", num_cpus);
 	vaddr += sizeof(u32);
-	reg_entry = (struct fadump_reg_entry *)vaddr;
+	reg_entry = (struct rtas_fadump_reg_entry *)vaddr;
 
 	rc = fadump_setup_cpu_notes_buf(num_cpus);
 	if (rc != 0)
@@ -892,22 +894,22 @@ static int __init fadump_build_cpu_notes(const struct fadump_mem_struct *fdm)
 		fdh = __va(fw_dump.fadumphdr_addr);
 
 	for (i = 0; i < num_cpus; i++) {
-		if (be64_to_cpu(reg_entry->reg_id) != REG_ID("CPUSTRT")) {
+		if (be64_to_cpu(reg_entry->reg_id) != fadump_str_to_u64("CPUSTRT")) {
 			printk(KERN_ERR "Unable to read CPU state data\n");
 			rc = -ENOENT;
 			goto error_out;
 		}
 		/* Lower 4 bytes of reg_value contains logical cpu id */
-		cpu = be64_to_cpu(reg_entry->reg_value) & FADUMP_CPU_ID_MASK;
+		cpu = be64_to_cpu(reg_entry->reg_value) & RTAS_FADUMP_CPU_ID_MASK;
 		if (fdh && !cpumask_test_cpu(cpu, &fdh->online_mask)) {
-			SKIP_TO_NEXT_CPU(reg_entry);
+			RTAS_FADUMP_SKIP_TO_NEXT_CPU(reg_entry);
 			continue;
 		}
 		pr_debug("Reading register data for cpu %d...\n", cpu);
 		if (fdh && fdh->crashing_cpu == cpu) {
 			regs = fdh->regs;
 			note_buf = fadump_regs_to_elf_notes(note_buf, &regs);
-			SKIP_TO_NEXT_CPU(reg_entry);
+			RTAS_FADUMP_SKIP_TO_NEXT_CPU(reg_entry);
 		} else {
 			reg_entry++;
 			reg_entry = fadump_read_registers(reg_entry, &regs);
@@ -933,7 +935,7 @@ error_out:
  * Validate and process the dump data stored by firmware before exporting
  * it through '/proc/vmcore'.
  */
-static int __init process_fadump(const struct fadump_mem_struct *fdm_active)
+static int __init process_fadump(const struct rtas_fadump_mem_struct *fdm_active)
 {
 	struct fadump_crash_info_header *fdh;
 	int rc = 0;
@@ -942,7 +944,7 @@ static int __init process_fadump(const struct fadump_mem_struct *fdm_active)
 		return -EINVAL;
 
 	/* Check if the dump data is valid. */
-	if ((be16_to_cpu(fdm_active->header.dump_status_flag) == FADUMP_ERROR_FLAG) ||
+	if ((be16_to_cpu(fdm_active->header.dump_status_flag) == RTAS_FADUMP_ERROR_FLAG) ||
 			(fdm_active->cpu_state_data.error_flags != 0) ||
 			(fdm_active->rmr_region.error_flags != 0)) {
 		printk(KERN_ERR "Dump taken by platform is not valid\n");
@@ -1273,7 +1275,7 @@ static unsigned long init_fadump_header(unsigned long addr)
 	fdh->magic_number = FADUMP_CRASH_INFO_MAGIC;
 	fdh->elfcorehdr_addr = addr;
 	/* We will set the crashing cpu id in crash_fadump() during crash. */
-	fdh->crashing_cpu = CPU_UNKNOWN;
+	fdh->crashing_cpu = FADUMP_CPU_UNKNOWN;
 
 	return addr;
 }
@@ -1307,7 +1309,7 @@ static int register_fadump(void)
 	return register_fw_dump(&fdm);
 }
 
-static int fadump_unregister_dump(struct fadump_mem_struct *fdm)
+static int fadump_unregister_dump(struct rtas_fadump_mem_struct *fdm)
 {
 	int rc = 0;
 	unsigned int wait_time;
@@ -1318,7 +1320,7 @@ static int fadump_unregister_dump(struct fadump_mem_struct *fdm)
 	do {
 		rc = rtas_call(fw_dump.ibm_configure_kernel_dump, 3, 1, NULL,
 			FADUMP_UNREGISTER, fdm,
-			sizeof(struct fadump_mem_struct));
+			sizeof(struct rtas_fadump_mem_struct));
 
 		wait_time = rtas_busy_delay_time(rc);
 		if (wait_time)
@@ -1334,7 +1336,7 @@ static int fadump_unregister_dump(struct fadump_mem_struct *fdm)
 	return 0;
 }
 
-static int fadump_invalidate_dump(const struct fadump_mem_struct *fdm)
+static int fadump_invalidate_dump(const struct rtas_fadump_mem_struct *fdm)
 {
 	int rc = 0;
 	unsigned int wait_time;
@@ -1345,7 +1347,7 @@ static int fadump_invalidate_dump(const struct fadump_mem_struct *fdm)
 	do {
 		rc = rtas_call(fw_dump.ibm_configure_kernel_dump, 3, 1, NULL,
 			FADUMP_INVALIDATE, fdm,
-			sizeof(struct fadump_mem_struct));
+			sizeof(struct rtas_fadump_mem_struct));
 
 		wait_time = rtas_busy_delay_time(rc);
 		if (wait_time)
@@ -1561,7 +1563,7 @@ unlock_out:
 
 static int fadump_region_show(struct seq_file *m, void *private)
 {
-	const struct fadump_mem_struct *fdm_ptr;
+	const struct rtas_fadump_mem_struct *fdm_ptr;
 
 	if (!fw_dump.fadump_enabled)
 		return 0;