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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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27167c7e9b
If CONFIG_BLK_DEV_INITRD is unset dt_prop_u64() is unused, which causes a warning. We don't really want to tie the definition to BLK_DEV_INITRD, so mark it as maybe unused. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
652 lines
16 KiB
C
652 lines
16 KiB
C
/*
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* Copyright (C) 2005-2006 Michael Ellerman, IBM Corporation
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* Copyright (C) 2000-2004, IBM Corporation
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*
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* Description:
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* This file contains all the routines to build a flattened device
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* tree for a legacy iSeries machine.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#undef DEBUG
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/pci_regs.h>
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#include <linux/pci_ids.h>
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#include <linux/threads.h>
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#include <linux/bitops.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/if_ether.h> /* ETH_ALEN */
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#include <asm/machdep.h>
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#include <asm/prom.h>
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#include <asm/lppaca.h>
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#include <asm/cputable.h>
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#include <asm/abs_addr.h>
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#include <asm/system.h>
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#include <asm/iseries/hv_types.h>
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#include <asm/iseries/hv_lp_config.h>
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#include <asm/iseries/hv_call_xm.h>
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#include <asm/udbg.h>
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#include "processor_vpd.h"
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#include "call_hpt.h"
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#include "call_pci.h"
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#include "pci.h"
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#include "it_exp_vpd_panel.h"
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#include "naca.h"
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#ifdef DEBUG
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#define DBG(fmt...) udbg_printf(fmt)
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#else
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#define DBG(fmt...)
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#endif
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/*
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* These are created by the linker script at the start and end
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* of the section containing all the strings from this file.
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*/
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extern char __dt_strings_start[];
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extern char __dt_strings_end[];
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struct iseries_flat_dt {
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struct boot_param_header header;
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u64 reserve_map[2];
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};
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static void * __initdata dt_data;
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/*
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* Putting these strings here keeps them out of the section
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* that we rename to .dt_strings using objcopy and capture
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* for the strings blob of the flattened device tree.
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*/
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static char __initdata device_type_cpu[] = "cpu";
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static char __initdata device_type_memory[] = "memory";
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static char __initdata device_type_serial[] = "serial";
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static char __initdata device_type_network[] = "network";
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static char __initdata device_type_pci[] = "pci";
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static char __initdata device_type_vdevice[] = "vdevice";
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static char __initdata device_type_vscsi[] = "vscsi";
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/* EBCDIC to ASCII conversion routines */
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static unsigned char __init e2a(unsigned char x)
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{
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switch (x) {
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case 0x81 ... 0x89:
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return x - 0x81 + 'a';
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case 0x91 ... 0x99:
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return x - 0x91 + 'j';
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case 0xA2 ... 0xA9:
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return x - 0xA2 + 's';
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case 0xC1 ... 0xC9:
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return x - 0xC1 + 'A';
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case 0xD1 ... 0xD9:
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return x - 0xD1 + 'J';
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case 0xE2 ... 0xE9:
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return x - 0xE2 + 'S';
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case 0xF0 ... 0xF9:
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return x - 0xF0 + '0';
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}
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return ' ';
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}
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static unsigned char * __init strne2a(unsigned char *dest,
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const unsigned char *src, size_t n)
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{
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int i;
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n = strnlen(src, n);
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for (i = 0; i < n; i++)
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dest[i] = e2a(src[i]);
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return dest;
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}
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static struct iseries_flat_dt * __init dt_init(void)
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{
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struct iseries_flat_dt *dt;
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unsigned long str_len;
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str_len = __dt_strings_end - __dt_strings_start;
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dt = (struct iseries_flat_dt *)ALIGN(klimit, 8);
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dt->header.off_mem_rsvmap =
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offsetof(struct iseries_flat_dt, reserve_map);
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dt->header.off_dt_strings = ALIGN(sizeof(*dt), 8);
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dt->header.off_dt_struct = dt->header.off_dt_strings
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+ ALIGN(str_len, 8);
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dt_data = (void *)((unsigned long)dt + dt->header.off_dt_struct);
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dt->header.dt_strings_size = str_len;
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/* There is no notion of hardware cpu id on iSeries */
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dt->header.boot_cpuid_phys = smp_processor_id();
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memcpy((char *)dt + dt->header.off_dt_strings, __dt_strings_start,
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str_len);
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dt->header.magic = OF_DT_HEADER;
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dt->header.version = 0x10;
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dt->header.last_comp_version = 0x10;
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dt->reserve_map[0] = 0;
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dt->reserve_map[1] = 0;
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return dt;
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}
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static void __init dt_push_u32(struct iseries_flat_dt *dt, u32 value)
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{
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*((u32 *)dt_data) = value;
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dt_data += sizeof(u32);
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}
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#ifdef notyet
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static void __init dt_push_u64(struct iseries_flat_dt *dt, u64 value)
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{
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*((u64 *)dt_data) = value;
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dt_data += sizeof(u64);
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}
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#endif
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static void __init dt_push_bytes(struct iseries_flat_dt *dt, const char *data,
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int len)
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{
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memcpy(dt_data, data, len);
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dt_data += ALIGN(len, 4);
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}
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static void __init dt_start_node(struct iseries_flat_dt *dt, const char *name)
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{
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dt_push_u32(dt, OF_DT_BEGIN_NODE);
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dt_push_bytes(dt, name, strlen(name) + 1);
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}
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#define dt_end_node(dt) dt_push_u32(dt, OF_DT_END_NODE)
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static void __init dt_prop(struct iseries_flat_dt *dt, const char *name,
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const void *data, int len)
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{
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unsigned long offset;
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dt_push_u32(dt, OF_DT_PROP);
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/* Length of the data */
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dt_push_u32(dt, len);
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offset = name - __dt_strings_start;
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/* The offset of the properties name in the string blob. */
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dt_push_u32(dt, (u32)offset);
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/* The actual data. */
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dt_push_bytes(dt, data, len);
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}
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static void __init dt_prop_str(struct iseries_flat_dt *dt, const char *name,
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const char *data)
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{
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dt_prop(dt, name, data, strlen(data) + 1); /* + 1 for NULL */
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}
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static void __init dt_prop_u32(struct iseries_flat_dt *dt, const char *name,
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u32 data)
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{
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dt_prop(dt, name, &data, sizeof(u32));
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}
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static void __init __maybe_unused dt_prop_u64(struct iseries_flat_dt *dt,
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const char *name,
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u64 data)
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{
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dt_prop(dt, name, &data, sizeof(u64));
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}
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static void __init dt_prop_u64_list(struct iseries_flat_dt *dt,
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const char *name, u64 *data, int n)
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{
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dt_prop(dt, name, data, sizeof(u64) * n);
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}
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static void __init dt_prop_u32_list(struct iseries_flat_dt *dt,
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const char *name, u32 *data, int n)
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{
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dt_prop(dt, name, data, sizeof(u32) * n);
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}
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#ifdef notyet
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static void __init dt_prop_empty(struct iseries_flat_dt *dt, const char *name)
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{
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dt_prop(dt, name, NULL, 0);
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}
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#endif
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static void __init dt_cpus(struct iseries_flat_dt *dt)
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{
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unsigned char buf[32];
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unsigned char *p;
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unsigned int i, index;
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struct IoHriProcessorVpd *d;
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u32 pft_size[2];
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/* yuck */
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snprintf(buf, 32, "PowerPC,%s", cur_cpu_spec->cpu_name);
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p = strchr(buf, ' ');
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if (!p) p = buf + strlen(buf);
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dt_start_node(dt, "cpus");
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dt_prop_u32(dt, "#address-cells", 1);
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dt_prop_u32(dt, "#size-cells", 0);
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pft_size[0] = 0; /* NUMA CEC cookie, 0 for non NUMA */
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pft_size[1] = __ilog2(HvCallHpt_getHptPages() * HW_PAGE_SIZE);
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for (i = 0; i < NR_CPUS; i++) {
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if (lppaca[i].dyn_proc_status >= 2)
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continue;
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snprintf(p, 32 - (p - buf), "@%d", i);
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dt_start_node(dt, buf);
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dt_prop_str(dt, "device_type", device_type_cpu);
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index = lppaca[i].dyn_hv_phys_proc_index;
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d = &xIoHriProcessorVpd[index];
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dt_prop_u32(dt, "i-cache-size", d->xInstCacheSize * 1024);
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dt_prop_u32(dt, "i-cache-line-size", d->xInstCacheOperandSize);
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dt_prop_u32(dt, "d-cache-size", d->xDataL1CacheSizeKB * 1024);
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dt_prop_u32(dt, "d-cache-line-size", d->xDataCacheOperandSize);
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/* magic conversions to Hz copied from old code */
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dt_prop_u32(dt, "clock-frequency",
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((1UL << 34) * 1000000) / d->xProcFreq);
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dt_prop_u32(dt, "timebase-frequency",
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((1UL << 32) * 1000000) / d->xTimeBaseFreq);
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dt_prop_u32(dt, "reg", i);
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dt_prop_u32_list(dt, "ibm,pft-size", pft_size, 2);
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dt_end_node(dt);
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}
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dt_end_node(dt);
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}
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static void __init dt_model(struct iseries_flat_dt *dt)
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{
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char buf[16] = "IBM,";
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/* N.B. lparcfg.c knows about the "IBM," prefixes ... */
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/* "IBM," + mfgId[2:3] + systemSerial[1:5] */
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strne2a(buf + 4, xItExtVpdPanel.mfgID + 2, 2);
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strne2a(buf + 6, xItExtVpdPanel.systemSerial + 1, 5);
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buf[11] = '\0';
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dt_prop_str(dt, "system-id", buf);
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/* "IBM," + machineType[0:4] */
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strne2a(buf + 4, xItExtVpdPanel.machineType, 4);
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buf[8] = '\0';
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dt_prop_str(dt, "model", buf);
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dt_prop_str(dt, "compatible", "IBM,iSeries");
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dt_prop_u32(dt, "ibm,partition-no", HvLpConfig_getLpIndex());
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}
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static void __init dt_initrd(struct iseries_flat_dt *dt)
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{
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#ifdef CONFIG_BLK_DEV_INITRD
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if (naca.xRamDisk) {
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dt_prop_u64(dt, "linux,initrd-start", (u64)naca.xRamDisk);
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dt_prop_u64(dt, "linux,initrd-end",
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(u64)naca.xRamDisk + naca.xRamDiskSize * HW_PAGE_SIZE);
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}
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#endif
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}
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static void __init dt_do_vdevice(struct iseries_flat_dt *dt,
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const char *name, u32 reg, int unit,
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const char *type, const char *compat, int end)
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{
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char buf[32];
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snprintf(buf, 32, "%s@%08x", name, reg + ((unit >= 0) ? unit : 0));
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dt_start_node(dt, buf);
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dt_prop_str(dt, "device_type", type);
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if (compat)
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dt_prop_str(dt, "compatible", compat);
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dt_prop_u32(dt, "reg", reg + ((unit >= 0) ? unit : 0));
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if (unit >= 0)
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dt_prop_u32(dt, "linux,unit_address", unit);
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if (end)
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dt_end_node(dt);
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}
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static void __init dt_vdevices(struct iseries_flat_dt *dt)
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{
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u32 reg = 0;
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HvLpIndexMap vlan_map;
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int i;
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dt_start_node(dt, "vdevice");
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dt_prop_str(dt, "device_type", device_type_vdevice);
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dt_prop_str(dt, "compatible", "IBM,iSeries-vdevice");
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dt_prop_u32(dt, "#address-cells", 1);
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dt_prop_u32(dt, "#size-cells", 0);
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dt_do_vdevice(dt, "vty", reg, -1, device_type_serial,
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"IBM,iSeries-vty", 1);
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reg++;
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dt_do_vdevice(dt, "v-scsi", reg, -1, device_type_vscsi,
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"IBM,v-scsi", 1);
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reg++;
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vlan_map = HvLpConfig_getVirtualLanIndexMap();
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for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
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unsigned char mac_addr[ETH_ALEN];
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if ((vlan_map & (0x8000 >> i)) == 0)
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continue;
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dt_do_vdevice(dt, "l-lan", reg, i, device_type_network,
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"IBM,iSeries-l-lan", 0);
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mac_addr[0] = 0x02;
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mac_addr[1] = 0x01;
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mac_addr[2] = 0xff;
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mac_addr[3] = i;
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mac_addr[4] = 0xff;
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mac_addr[5] = HvLpConfig_getLpIndex_outline();
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dt_prop(dt, "local-mac-address", (char *)mac_addr, ETH_ALEN);
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dt_prop(dt, "mac-address", (char *)mac_addr, ETH_ALEN);
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dt_prop_u32(dt, "max-frame-size", 9000);
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dt_prop_u32(dt, "address-bits", 48);
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dt_end_node(dt);
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}
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dt_end_node(dt);
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}
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struct pci_class_name {
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u16 code;
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const char *name;
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const char *type;
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};
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static struct pci_class_name __initdata pci_class_name[] = {
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{ PCI_CLASS_NETWORK_ETHERNET, "ethernet", device_type_network },
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};
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static struct pci_class_name * __init dt_find_pci_class_name(u16 class_code)
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{
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struct pci_class_name *cp;
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for (cp = pci_class_name;
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cp < &pci_class_name[ARRAY_SIZE(pci_class_name)]; cp++)
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if (cp->code == class_code)
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return cp;
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return NULL;
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}
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/*
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* This assumes that the node slot is always on the primary bus!
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*/
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static void __init scan_bridge_slot(struct iseries_flat_dt *dt,
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HvBusNumber bus, struct HvCallPci_BridgeInfo *bridge_info)
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{
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HvSubBusNumber sub_bus = bridge_info->subBusNumber;
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u16 vendor_id;
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u16 device_id;
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u32 class_id;
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int err;
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char buf[32];
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u32 reg[5];
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int id_sel = ISERIES_GET_DEVICE_FROM_SUBBUS(sub_bus);
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int function = ISERIES_GET_FUNCTION_FROM_SUBBUS(sub_bus);
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HvAgentId eads_id_sel = ISERIES_PCI_AGENTID(id_sel, function);
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u8 devfn;
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struct pci_class_name *cp;
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/*
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* Connect all functions of any device found.
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*/
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for (id_sel = 1; id_sel <= bridge_info->maxAgents; id_sel++) {
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for (function = 0; function < 8; function++) {
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HvAgentId agent_id = ISERIES_PCI_AGENTID(id_sel,
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function);
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err = HvCallXm_connectBusUnit(bus, sub_bus,
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agent_id, 0);
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if (err) {
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if (err != 0x302)
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DBG("connectBusUnit(%x, %x, %x) %x\n",
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bus, sub_bus, agent_id, err);
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continue;
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}
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err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
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PCI_VENDOR_ID, &vendor_id);
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if (err) {
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DBG("ReadVendor(%x, %x, %x) %x\n",
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bus, sub_bus, agent_id, err);
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continue;
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}
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err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
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PCI_DEVICE_ID, &device_id);
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if (err) {
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DBG("ReadDevice(%x, %x, %x) %x\n",
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bus, sub_bus, agent_id, err);
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continue;
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}
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err = HvCallPci_configLoad32(bus, sub_bus, agent_id,
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PCI_CLASS_REVISION , &class_id);
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if (err) {
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DBG("ReadClass(%x, %x, %x) %x\n",
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bus, sub_bus, agent_id, err);
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continue;
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}
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devfn = PCI_DEVFN(ISERIES_ENCODE_DEVICE(eads_id_sel),
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function);
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cp = dt_find_pci_class_name(class_id >> 16);
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if (cp && cp->name)
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strncpy(buf, cp->name, sizeof(buf) - 1);
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else
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snprintf(buf, sizeof(buf), "pci%x,%x",
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vendor_id, device_id);
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buf[sizeof(buf) - 1] = '\0';
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snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
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"@%x", PCI_SLOT(devfn));
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buf[sizeof(buf) - 1] = '\0';
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if (function != 0)
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snprintf(buf + strlen(buf),
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sizeof(buf) - strlen(buf),
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",%x", function);
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dt_start_node(dt, buf);
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reg[0] = (bus << 16) | (devfn << 8);
|
|
reg[1] = 0;
|
|
reg[2] = 0;
|
|
reg[3] = 0;
|
|
reg[4] = 0;
|
|
dt_prop_u32_list(dt, "reg", reg, 5);
|
|
if (cp && (cp->type || cp->name))
|
|
dt_prop_str(dt, "device_type",
|
|
cp->type ? cp->type : cp->name);
|
|
dt_prop_u32(dt, "vendor-id", vendor_id);
|
|
dt_prop_u32(dt, "device-id", device_id);
|
|
dt_prop_u32(dt, "class-code", class_id >> 8);
|
|
dt_prop_u32(dt, "revision-id", class_id & 0xff);
|
|
dt_prop_u32(dt, "linux,subbus", sub_bus);
|
|
dt_prop_u32(dt, "linux,agent-id", agent_id);
|
|
dt_prop_u32(dt, "linux,logical-slot-number",
|
|
bridge_info->logicalSlotNumber);
|
|
dt_end_node(dt);
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
static void __init scan_bridge(struct iseries_flat_dt *dt, HvBusNumber bus,
|
|
HvSubBusNumber sub_bus, int id_sel)
|
|
{
|
|
struct HvCallPci_BridgeInfo bridge_info;
|
|
HvAgentId agent_id;
|
|
int function;
|
|
int ret;
|
|
|
|
/* Note: hvSubBus and irq is always be 0 at this level! */
|
|
for (function = 0; function < 8; ++function) {
|
|
agent_id = ISERIES_PCI_AGENTID(id_sel, function);
|
|
ret = HvCallXm_connectBusUnit(bus, sub_bus, agent_id, 0);
|
|
if (ret != 0) {
|
|
if (ret != 0xb)
|
|
DBG("connectBusUnit(%x, %x, %x) %x\n",
|
|
bus, sub_bus, agent_id, ret);
|
|
continue;
|
|
}
|
|
DBG("found device at bus %d idsel %d func %d (AgentId %x)\n",
|
|
bus, id_sel, function, agent_id);
|
|
ret = HvCallPci_getBusUnitInfo(bus, sub_bus, agent_id,
|
|
iseries_hv_addr(&bridge_info),
|
|
sizeof(struct HvCallPci_BridgeInfo));
|
|
if (ret != 0)
|
|
continue;
|
|
DBG("bridge info: type %x subbus %x "
|
|
"maxAgents %x maxsubbus %x logslot %x\n",
|
|
bridge_info.busUnitInfo.deviceType,
|
|
bridge_info.subBusNumber,
|
|
bridge_info.maxAgents,
|
|
bridge_info.maxSubBusNumber,
|
|
bridge_info.logicalSlotNumber);
|
|
if (bridge_info.busUnitInfo.deviceType ==
|
|
HvCallPci_BridgeDevice)
|
|
scan_bridge_slot(dt, bus, &bridge_info);
|
|
else
|
|
DBG("PCI: Invalid Bridge Configuration(0x%02X)",
|
|
bridge_info.busUnitInfo.deviceType);
|
|
}
|
|
}
|
|
|
|
static void __init scan_phb(struct iseries_flat_dt *dt, HvBusNumber bus)
|
|
{
|
|
struct HvCallPci_DeviceInfo dev_info;
|
|
const HvSubBusNumber sub_bus = 0; /* EADs is always 0. */
|
|
int err;
|
|
int id_sel;
|
|
const int max_agents = 8;
|
|
|
|
/*
|
|
* Probe for EADs Bridges
|
|
*/
|
|
for (id_sel = 1; id_sel < max_agents; ++id_sel) {
|
|
err = HvCallPci_getDeviceInfo(bus, sub_bus, id_sel,
|
|
iseries_hv_addr(&dev_info),
|
|
sizeof(struct HvCallPci_DeviceInfo));
|
|
if (err) {
|
|
if (err != 0x302)
|
|
DBG("getDeviceInfo(%x, %x, %x) %x\n",
|
|
bus, sub_bus, id_sel, err);
|
|
continue;
|
|
}
|
|
if (dev_info.deviceType != HvCallPci_NodeDevice) {
|
|
DBG("PCI: Invalid System Configuration"
|
|
"(0x%02X) for bus 0x%02x id 0x%02x.\n",
|
|
dev_info.deviceType, bus, id_sel);
|
|
continue;
|
|
}
|
|
scan_bridge(dt, bus, sub_bus, id_sel);
|
|
}
|
|
}
|
|
|
|
static void __init dt_pci_devices(struct iseries_flat_dt *dt)
|
|
{
|
|
HvBusNumber bus;
|
|
char buf[32];
|
|
u32 buses[2];
|
|
int phb_num = 0;
|
|
|
|
/* Check all possible buses. */
|
|
for (bus = 0; bus < 256; bus++) {
|
|
int err = HvCallXm_testBus(bus);
|
|
|
|
if (err) {
|
|
/*
|
|
* Check for Unexpected Return code, a clue that
|
|
* something has gone wrong.
|
|
*/
|
|
if (err != 0x0301)
|
|
DBG("Unexpected Return on Probe(0x%02X) "
|
|
"0x%04X\n", bus, err);
|
|
continue;
|
|
}
|
|
DBG("bus %d appears to exist\n", bus);
|
|
snprintf(buf, 32, "pci@%d", phb_num);
|
|
dt_start_node(dt, buf);
|
|
dt_prop_str(dt, "device_type", device_type_pci);
|
|
dt_prop_str(dt, "compatible", "IBM,iSeries-Logical-PHB");
|
|
dt_prop_u32(dt, "#address-cells", 3);
|
|
dt_prop_u32(dt, "#size-cells", 2);
|
|
buses[0] = buses[1] = bus;
|
|
dt_prop_u32_list(dt, "bus-range", buses, 2);
|
|
scan_phb(dt, bus);
|
|
dt_end_node(dt);
|
|
phb_num++;
|
|
}
|
|
}
|
|
|
|
static void dt_finish(struct iseries_flat_dt *dt)
|
|
{
|
|
dt_push_u32(dt, OF_DT_END);
|
|
dt->header.totalsize = (unsigned long)dt_data - (unsigned long)dt;
|
|
klimit = ALIGN((unsigned long)dt_data, 8);
|
|
}
|
|
|
|
void * __init build_flat_dt(unsigned long phys_mem_size)
|
|
{
|
|
struct iseries_flat_dt *iseries_dt;
|
|
u64 tmp[2];
|
|
|
|
iseries_dt = dt_init();
|
|
|
|
dt_start_node(iseries_dt, "");
|
|
|
|
dt_prop_u32(iseries_dt, "#address-cells", 2);
|
|
dt_prop_u32(iseries_dt, "#size-cells", 2);
|
|
dt_model(iseries_dt);
|
|
|
|
/* /memory */
|
|
dt_start_node(iseries_dt, "memory@0");
|
|
dt_prop_str(iseries_dt, "device_type", device_type_memory);
|
|
tmp[0] = 0;
|
|
tmp[1] = phys_mem_size;
|
|
dt_prop_u64_list(iseries_dt, "reg", tmp, 2);
|
|
dt_end_node(iseries_dt);
|
|
|
|
/* /chosen */
|
|
dt_start_node(iseries_dt, "chosen");
|
|
dt_prop_str(iseries_dt, "bootargs", cmd_line);
|
|
dt_initrd(iseries_dt);
|
|
dt_end_node(iseries_dt);
|
|
|
|
dt_cpus(iseries_dt);
|
|
|
|
dt_vdevices(iseries_dt);
|
|
dt_pci_devices(iseries_dt);
|
|
|
|
dt_end_node(iseries_dt);
|
|
|
|
dt_finish(iseries_dt);
|
|
|
|
return iseries_dt;
|
|
}
|