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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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0ab2fcd69d
During MDESC handle allocation, use the __GFP_REPEAT flag instead of __GFP_NOFAIL. If memory is not available, the caller expects a NULL pointer instead of waiting until memory is allocated. Signed-off-by: Jagannathan Raman <jag.raman@oracle.com> Reviewed-by: Liam Merwick <liam.merwick@oracle.com> Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1323 lines
29 KiB
C
1323 lines
29 KiB
C
/* mdesc.c: Sun4V machine description handling.
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*
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* Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/memblock.h>
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#include <linux/log2.h>
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#include <linux/list.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/miscdevice.h>
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#include <linux/bootmem.h>
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#include <linux/export.h>
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#include <asm/cpudata.h>
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#include <asm/hypervisor.h>
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#include <asm/mdesc.h>
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#include <asm/prom.h>
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#include <linux/uaccess.h>
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#include <asm/oplib.h>
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#include <asm/smp.h>
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/* Unlike the OBP device tree, the machine description is a full-on
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* DAG. An arbitrary number of ARCs are possible from one
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* node to other nodes and thus we can't use the OBP device_node
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* data structure to represent these nodes inside of the kernel.
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*
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* Actually, it isn't even a DAG, because there are back pointers
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* which create cycles in the graph.
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*
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* mdesc_hdr and mdesc_elem describe the layout of the data structure
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* we get from the Hypervisor.
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*/
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struct mdesc_hdr {
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u32 version; /* Transport version */
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u32 node_sz; /* node block size */
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u32 name_sz; /* name block size */
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u32 data_sz; /* data block size */
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} __attribute__((aligned(16)));
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struct mdesc_elem {
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u8 tag;
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#define MD_LIST_END 0x00
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#define MD_NODE 0x4e
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#define MD_NODE_END 0x45
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#define MD_NOOP 0x20
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#define MD_PROP_ARC 0x61
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#define MD_PROP_VAL 0x76
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#define MD_PROP_STR 0x73
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#define MD_PROP_DATA 0x64
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u8 name_len;
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u16 resv;
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u32 name_offset;
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union {
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struct {
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u32 data_len;
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u32 data_offset;
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} data;
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u64 val;
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} d;
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};
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struct mdesc_mem_ops {
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struct mdesc_handle *(*alloc)(unsigned int mdesc_size);
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void (*free)(struct mdesc_handle *handle);
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};
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struct mdesc_handle {
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struct list_head list;
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struct mdesc_mem_ops *mops;
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void *self_base;
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atomic_t refcnt;
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unsigned int handle_size;
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struct mdesc_hdr mdesc;
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};
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typedef int (*mdesc_node_info_get_f)(struct mdesc_handle *, u64,
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union md_node_info *);
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typedef void (*mdesc_node_info_rel_f)(union md_node_info *);
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typedef bool (*mdesc_node_match_f)(union md_node_info *, union md_node_info *);
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struct md_node_ops {
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char *name;
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mdesc_node_info_get_f get_info;
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mdesc_node_info_rel_f rel_info;
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mdesc_node_match_f node_match;
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};
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static int get_vdev_port_node_info(struct mdesc_handle *md, u64 node,
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union md_node_info *node_info);
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static void rel_vdev_port_node_info(union md_node_info *node_info);
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static bool vdev_port_node_match(union md_node_info *a_node_info,
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union md_node_info *b_node_info);
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static int get_ds_port_node_info(struct mdesc_handle *md, u64 node,
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union md_node_info *node_info);
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static void rel_ds_port_node_info(union md_node_info *node_info);
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static bool ds_port_node_match(union md_node_info *a_node_info,
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union md_node_info *b_node_info);
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/* supported node types which can be registered */
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static struct md_node_ops md_node_ops_table[] = {
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{"virtual-device-port", get_vdev_port_node_info,
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rel_vdev_port_node_info, vdev_port_node_match},
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{"domain-services-port", get_ds_port_node_info,
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rel_ds_port_node_info, ds_port_node_match},
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{NULL, NULL, NULL, NULL}
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};
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static void mdesc_get_node_ops(const char *node_name,
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mdesc_node_info_get_f *get_info_f,
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mdesc_node_info_rel_f *rel_info_f,
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mdesc_node_match_f *match_f)
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{
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int i;
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if (get_info_f)
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*get_info_f = NULL;
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if (rel_info_f)
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*rel_info_f = NULL;
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if (match_f)
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*match_f = NULL;
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if (!node_name)
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return;
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for (i = 0; md_node_ops_table[i].name != NULL; i++) {
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if (strcmp(md_node_ops_table[i].name, node_name) == 0) {
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if (get_info_f)
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*get_info_f = md_node_ops_table[i].get_info;
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if (rel_info_f)
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*rel_info_f = md_node_ops_table[i].rel_info;
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if (match_f)
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*match_f = md_node_ops_table[i].node_match;
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break;
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}
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}
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}
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static void mdesc_handle_init(struct mdesc_handle *hp,
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unsigned int handle_size,
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void *base)
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{
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BUG_ON(((unsigned long)&hp->mdesc) & (16UL - 1));
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memset(hp, 0, handle_size);
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INIT_LIST_HEAD(&hp->list);
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hp->self_base = base;
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atomic_set(&hp->refcnt, 1);
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hp->handle_size = handle_size;
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}
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static struct mdesc_handle * __init mdesc_memblock_alloc(unsigned int mdesc_size)
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{
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unsigned int handle_size, alloc_size;
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struct mdesc_handle *hp;
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unsigned long paddr;
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handle_size = (sizeof(struct mdesc_handle) -
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sizeof(struct mdesc_hdr) +
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mdesc_size);
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alloc_size = PAGE_ALIGN(handle_size);
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paddr = memblock_alloc(alloc_size, PAGE_SIZE);
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hp = NULL;
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if (paddr) {
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hp = __va(paddr);
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mdesc_handle_init(hp, handle_size, hp);
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}
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return hp;
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}
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static void __init mdesc_memblock_free(struct mdesc_handle *hp)
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{
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unsigned int alloc_size;
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unsigned long start;
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BUG_ON(atomic_read(&hp->refcnt) != 0);
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BUG_ON(!list_empty(&hp->list));
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alloc_size = PAGE_ALIGN(hp->handle_size);
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start = __pa(hp);
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free_bootmem_late(start, alloc_size);
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}
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static struct mdesc_mem_ops memblock_mdesc_ops = {
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.alloc = mdesc_memblock_alloc,
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.free = mdesc_memblock_free,
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};
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static struct mdesc_handle *mdesc_kmalloc(unsigned int mdesc_size)
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{
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unsigned int handle_size;
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struct mdesc_handle *hp;
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unsigned long addr;
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void *base;
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handle_size = (sizeof(struct mdesc_handle) -
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sizeof(struct mdesc_hdr) +
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mdesc_size);
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base = kmalloc(handle_size + 15, GFP_KERNEL | __GFP_REPEAT);
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if (!base)
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return NULL;
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addr = (unsigned long)base;
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addr = (addr + 15UL) & ~15UL;
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hp = (struct mdesc_handle *) addr;
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mdesc_handle_init(hp, handle_size, base);
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return hp;
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}
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static void mdesc_kfree(struct mdesc_handle *hp)
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{
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BUG_ON(atomic_read(&hp->refcnt) != 0);
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BUG_ON(!list_empty(&hp->list));
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kfree(hp->self_base);
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}
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static struct mdesc_mem_ops kmalloc_mdesc_memops = {
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.alloc = mdesc_kmalloc,
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.free = mdesc_kfree,
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};
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static struct mdesc_handle *mdesc_alloc(unsigned int mdesc_size,
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struct mdesc_mem_ops *mops)
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{
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struct mdesc_handle *hp = mops->alloc(mdesc_size);
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if (hp)
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hp->mops = mops;
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return hp;
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}
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static void mdesc_free(struct mdesc_handle *hp)
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{
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hp->mops->free(hp);
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}
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static struct mdesc_handle *cur_mdesc;
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static LIST_HEAD(mdesc_zombie_list);
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static DEFINE_SPINLOCK(mdesc_lock);
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struct mdesc_handle *mdesc_grab(void)
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{
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struct mdesc_handle *hp;
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unsigned long flags;
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spin_lock_irqsave(&mdesc_lock, flags);
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hp = cur_mdesc;
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if (hp)
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atomic_inc(&hp->refcnt);
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spin_unlock_irqrestore(&mdesc_lock, flags);
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return hp;
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}
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EXPORT_SYMBOL(mdesc_grab);
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void mdesc_release(struct mdesc_handle *hp)
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{
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unsigned long flags;
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spin_lock_irqsave(&mdesc_lock, flags);
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if (atomic_dec_and_test(&hp->refcnt)) {
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list_del_init(&hp->list);
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hp->mops->free(hp);
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}
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spin_unlock_irqrestore(&mdesc_lock, flags);
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}
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EXPORT_SYMBOL(mdesc_release);
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static DEFINE_MUTEX(mdesc_mutex);
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static struct mdesc_notifier_client *client_list;
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void mdesc_register_notifier(struct mdesc_notifier_client *client)
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{
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u64 node;
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mutex_lock(&mdesc_mutex);
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client->next = client_list;
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client_list = client;
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mdesc_for_each_node_by_name(cur_mdesc, node, client->node_name)
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client->add(cur_mdesc, node);
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mutex_unlock(&mdesc_mutex);
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}
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static const u64 *parent_cfg_handle(struct mdesc_handle *hp, u64 node)
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{
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const u64 *id;
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u64 a;
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id = NULL;
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mdesc_for_each_arc(a, hp, node, MDESC_ARC_TYPE_BACK) {
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u64 target;
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target = mdesc_arc_target(hp, a);
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id = mdesc_get_property(hp, target,
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"cfg-handle", NULL);
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if (id)
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break;
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}
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return id;
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}
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static int get_vdev_port_node_info(struct mdesc_handle *md, u64 node,
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union md_node_info *node_info)
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{
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const u64 *parent_cfg_hdlp;
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const char *name;
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const u64 *idp;
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/*
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* Virtual device nodes are distinguished by:
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* 1. "id" property
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* 2. "name" property
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* 3. parent node "cfg-handle" property
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*/
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idp = mdesc_get_property(md, node, "id", NULL);
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name = mdesc_get_property(md, node, "name", NULL);
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parent_cfg_hdlp = parent_cfg_handle(md, node);
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if (!idp || !name || !parent_cfg_hdlp)
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return -1;
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node_info->vdev_port.id = *idp;
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node_info->vdev_port.name = kstrdup_const(name, GFP_KERNEL);
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node_info->vdev_port.parent_cfg_hdl = *parent_cfg_hdlp;
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return 0;
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}
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static void rel_vdev_port_node_info(union md_node_info *node_info)
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{
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if (node_info && node_info->vdev_port.name) {
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kfree_const(node_info->vdev_port.name);
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node_info->vdev_port.name = NULL;
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}
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}
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static bool vdev_port_node_match(union md_node_info *a_node_info,
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union md_node_info *b_node_info)
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{
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if (a_node_info->vdev_port.id != b_node_info->vdev_port.id)
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return false;
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if (a_node_info->vdev_port.parent_cfg_hdl !=
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b_node_info->vdev_port.parent_cfg_hdl)
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return false;
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if (strncmp(a_node_info->vdev_port.name,
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b_node_info->vdev_port.name, MDESC_MAX_STR_LEN) != 0)
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return false;
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return true;
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}
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static int get_ds_port_node_info(struct mdesc_handle *md, u64 node,
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union md_node_info *node_info)
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{
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const u64 *idp;
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/* DS port nodes use the "id" property to distinguish them */
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idp = mdesc_get_property(md, node, "id", NULL);
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if (!idp)
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return -1;
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node_info->ds_port.id = *idp;
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return 0;
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}
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static void rel_ds_port_node_info(union md_node_info *node_info)
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{
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}
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static bool ds_port_node_match(union md_node_info *a_node_info,
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union md_node_info *b_node_info)
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{
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if (a_node_info->ds_port.id != b_node_info->ds_port.id)
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return false;
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return true;
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}
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/* Run 'func' on nodes which are in A but not in B. */
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static void invoke_on_missing(const char *name,
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struct mdesc_handle *a,
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struct mdesc_handle *b,
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void (*func)(struct mdesc_handle *, u64))
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{
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u64 node;
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mdesc_for_each_node_by_name(a, node, name) {
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int found = 0, is_vdc_port = 0;
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const char *name_prop;
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const u64 *id;
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u64 fnode;
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name_prop = mdesc_get_property(a, node, "name", NULL);
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if (name_prop && !strcmp(name_prop, "vdc-port")) {
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is_vdc_port = 1;
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id = parent_cfg_handle(a, node);
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} else
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id = mdesc_get_property(a, node, "id", NULL);
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if (!id) {
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printk(KERN_ERR "MD: Cannot find ID for %s node.\n",
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(name_prop ? name_prop : name));
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continue;
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}
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mdesc_for_each_node_by_name(b, fnode, name) {
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const u64 *fid;
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if (is_vdc_port) {
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name_prop = mdesc_get_property(b, fnode,
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"name", NULL);
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if (!name_prop ||
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strcmp(name_prop, "vdc-port"))
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continue;
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fid = parent_cfg_handle(b, fnode);
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if (!fid) {
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printk(KERN_ERR "MD: Cannot find ID "
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"for vdc-port node.\n");
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continue;
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}
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} else
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fid = mdesc_get_property(b, fnode,
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"id", NULL);
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if (*id == *fid) {
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found = 1;
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break;
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}
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}
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if (!found)
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func(a, node);
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}
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}
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static void notify_one(struct mdesc_notifier_client *p,
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struct mdesc_handle *old_hp,
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struct mdesc_handle *new_hp)
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{
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invoke_on_missing(p->node_name, old_hp, new_hp, p->remove);
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invoke_on_missing(p->node_name, new_hp, old_hp, p->add);
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}
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static void mdesc_notify_clients(struct mdesc_handle *old_hp,
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struct mdesc_handle *new_hp)
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{
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struct mdesc_notifier_client *p = client_list;
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while (p) {
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notify_one(p, old_hp, new_hp);
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p = p->next;
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}
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}
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void mdesc_update(void)
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{
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unsigned long len, real_len, status;
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struct mdesc_handle *hp, *orig_hp;
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unsigned long flags;
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mutex_lock(&mdesc_mutex);
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(void) sun4v_mach_desc(0UL, 0UL, &len);
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hp = mdesc_alloc(len, &kmalloc_mdesc_memops);
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if (!hp) {
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printk(KERN_ERR "MD: mdesc alloc fails\n");
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goto out;
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}
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status = sun4v_mach_desc(__pa(&hp->mdesc), len, &real_len);
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if (status != HV_EOK || real_len > len) {
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printk(KERN_ERR "MD: mdesc reread fails with %lu\n",
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status);
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atomic_dec(&hp->refcnt);
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mdesc_free(hp);
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goto out;
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}
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spin_lock_irqsave(&mdesc_lock, flags);
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orig_hp = cur_mdesc;
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cur_mdesc = hp;
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spin_unlock_irqrestore(&mdesc_lock, flags);
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mdesc_notify_clients(orig_hp, hp);
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spin_lock_irqsave(&mdesc_lock, flags);
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if (atomic_dec_and_test(&orig_hp->refcnt))
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mdesc_free(orig_hp);
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else
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list_add(&orig_hp->list, &mdesc_zombie_list);
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spin_unlock_irqrestore(&mdesc_lock, flags);
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out:
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mutex_unlock(&mdesc_mutex);
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}
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|
|
u64 mdesc_get_node(struct mdesc_handle *hp, const char *node_name,
|
|
union md_node_info *node_info)
|
|
{
|
|
mdesc_node_info_get_f get_info_func;
|
|
mdesc_node_info_rel_f rel_info_func;
|
|
mdesc_node_match_f node_match_func;
|
|
union md_node_info hp_node_info;
|
|
u64 hp_node;
|
|
int rv;
|
|
|
|
if (hp == NULL || node_name == NULL || node_info == NULL)
|
|
return MDESC_NODE_NULL;
|
|
|
|
/* Find the ops for the given node name */
|
|
mdesc_get_node_ops(node_name, &get_info_func, &rel_info_func,
|
|
&node_match_func);
|
|
|
|
/* If we didn't find ops for the given node name, it is not supported */
|
|
if (!get_info_func || !rel_info_func || !node_match_func) {
|
|
pr_err("MD: %s node is not supported\n", node_name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
mdesc_for_each_node_by_name(hp, hp_node, node_name) {
|
|
rv = get_info_func(hp, hp_node, &hp_node_info);
|
|
if (rv != 0)
|
|
continue;
|
|
|
|
if (node_match_func(node_info, &hp_node_info))
|
|
break;
|
|
|
|
rel_info_func(&hp_node_info);
|
|
}
|
|
|
|
rel_info_func(&hp_node_info);
|
|
|
|
return hp_node;
|
|
}
|
|
|
|
int mdesc_get_node_info(struct mdesc_handle *hp, u64 node,
|
|
const char *node_name, union md_node_info *node_info)
|
|
{
|
|
mdesc_node_info_get_f get_info_func;
|
|
int rv;
|
|
|
|
if (hp == NULL || node == MDESC_NODE_NULL ||
|
|
node_name == NULL || node_info == NULL)
|
|
return -EINVAL;
|
|
|
|
/* Find the get_info op for the given node name */
|
|
mdesc_get_node_ops(node_name, &get_info_func, NULL, NULL);
|
|
|
|
/* If we didn't find a get_info_func, the node name is not supported */
|
|
if (get_info_func == NULL) {
|
|
pr_err("MD: %s node is not supported\n", node_name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
rv = get_info_func(hp, node, node_info);
|
|
if (rv != 0) {
|
|
pr_err("MD: Cannot find 1 or more required match properties for %s node.\n",
|
|
node_name);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct mdesc_elem *node_block(struct mdesc_hdr *mdesc)
|
|
{
|
|
return (struct mdesc_elem *) (mdesc + 1);
|
|
}
|
|
|
|
static void *name_block(struct mdesc_hdr *mdesc)
|
|
{
|
|
return ((void *) node_block(mdesc)) + mdesc->node_sz;
|
|
}
|
|
|
|
static void *data_block(struct mdesc_hdr *mdesc)
|
|
{
|
|
return ((void *) name_block(mdesc)) + mdesc->name_sz;
|
|
}
|
|
|
|
u64 mdesc_node_by_name(struct mdesc_handle *hp,
|
|
u64 from_node, const char *name)
|
|
{
|
|
struct mdesc_elem *ep = node_block(&hp->mdesc);
|
|
const char *names = name_block(&hp->mdesc);
|
|
u64 last_node = hp->mdesc.node_sz / 16;
|
|
u64 ret;
|
|
|
|
if (from_node == MDESC_NODE_NULL) {
|
|
ret = from_node = 0;
|
|
} else if (from_node >= last_node) {
|
|
return MDESC_NODE_NULL;
|
|
} else {
|
|
ret = ep[from_node].d.val;
|
|
}
|
|
|
|
while (ret < last_node) {
|
|
if (ep[ret].tag != MD_NODE)
|
|
return MDESC_NODE_NULL;
|
|
if (!strcmp(names + ep[ret].name_offset, name))
|
|
break;
|
|
ret = ep[ret].d.val;
|
|
}
|
|
if (ret >= last_node)
|
|
ret = MDESC_NODE_NULL;
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(mdesc_node_by_name);
|
|
|
|
const void *mdesc_get_property(struct mdesc_handle *hp, u64 node,
|
|
const char *name, int *lenp)
|
|
{
|
|
const char *names = name_block(&hp->mdesc);
|
|
u64 last_node = hp->mdesc.node_sz / 16;
|
|
void *data = data_block(&hp->mdesc);
|
|
struct mdesc_elem *ep;
|
|
|
|
if (node == MDESC_NODE_NULL || node >= last_node)
|
|
return NULL;
|
|
|
|
ep = node_block(&hp->mdesc) + node;
|
|
ep++;
|
|
for (; ep->tag != MD_NODE_END; ep++) {
|
|
void *val = NULL;
|
|
int len = 0;
|
|
|
|
switch (ep->tag) {
|
|
case MD_PROP_VAL:
|
|
val = &ep->d.val;
|
|
len = 8;
|
|
break;
|
|
|
|
case MD_PROP_STR:
|
|
case MD_PROP_DATA:
|
|
val = data + ep->d.data.data_offset;
|
|
len = ep->d.data.data_len;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
if (!val)
|
|
continue;
|
|
|
|
if (!strcmp(names + ep->name_offset, name)) {
|
|
if (lenp)
|
|
*lenp = len;
|
|
return val;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(mdesc_get_property);
|
|
|
|
u64 mdesc_next_arc(struct mdesc_handle *hp, u64 from, const char *arc_type)
|
|
{
|
|
struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
|
|
const char *names = name_block(&hp->mdesc);
|
|
u64 last_node = hp->mdesc.node_sz / 16;
|
|
|
|
if (from == MDESC_NODE_NULL || from >= last_node)
|
|
return MDESC_NODE_NULL;
|
|
|
|
ep = base + from;
|
|
|
|
ep++;
|
|
for (; ep->tag != MD_NODE_END; ep++) {
|
|
if (ep->tag != MD_PROP_ARC)
|
|
continue;
|
|
|
|
if (strcmp(names + ep->name_offset, arc_type))
|
|
continue;
|
|
|
|
return ep - base;
|
|
}
|
|
|
|
return MDESC_NODE_NULL;
|
|
}
|
|
EXPORT_SYMBOL(mdesc_next_arc);
|
|
|
|
u64 mdesc_arc_target(struct mdesc_handle *hp, u64 arc)
|
|
{
|
|
struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
|
|
|
|
ep = base + arc;
|
|
|
|
return ep->d.val;
|
|
}
|
|
EXPORT_SYMBOL(mdesc_arc_target);
|
|
|
|
const char *mdesc_node_name(struct mdesc_handle *hp, u64 node)
|
|
{
|
|
struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
|
|
const char *names = name_block(&hp->mdesc);
|
|
u64 last_node = hp->mdesc.node_sz / 16;
|
|
|
|
if (node == MDESC_NODE_NULL || node >= last_node)
|
|
return NULL;
|
|
|
|
ep = base + node;
|
|
if (ep->tag != MD_NODE)
|
|
return NULL;
|
|
|
|
return names + ep->name_offset;
|
|
}
|
|
EXPORT_SYMBOL(mdesc_node_name);
|
|
|
|
static u64 max_cpus = 64;
|
|
|
|
static void __init report_platform_properties(void)
|
|
{
|
|
struct mdesc_handle *hp = mdesc_grab();
|
|
u64 pn = mdesc_node_by_name(hp, MDESC_NODE_NULL, "platform");
|
|
const char *s;
|
|
const u64 *v;
|
|
|
|
if (pn == MDESC_NODE_NULL) {
|
|
prom_printf("No platform node in machine-description.\n");
|
|
prom_halt();
|
|
}
|
|
|
|
s = mdesc_get_property(hp, pn, "banner-name", NULL);
|
|
printk("PLATFORM: banner-name [%s]\n", s);
|
|
s = mdesc_get_property(hp, pn, "name", NULL);
|
|
printk("PLATFORM: name [%s]\n", s);
|
|
|
|
v = mdesc_get_property(hp, pn, "hostid", NULL);
|
|
if (v)
|
|
printk("PLATFORM: hostid [%08llx]\n", *v);
|
|
v = mdesc_get_property(hp, pn, "serial#", NULL);
|
|
if (v)
|
|
printk("PLATFORM: serial# [%08llx]\n", *v);
|
|
v = mdesc_get_property(hp, pn, "stick-frequency", NULL);
|
|
printk("PLATFORM: stick-frequency [%08llx]\n", *v);
|
|
v = mdesc_get_property(hp, pn, "mac-address", NULL);
|
|
if (v)
|
|
printk("PLATFORM: mac-address [%llx]\n", *v);
|
|
v = mdesc_get_property(hp, pn, "watchdog-resolution", NULL);
|
|
if (v)
|
|
printk("PLATFORM: watchdog-resolution [%llu ms]\n", *v);
|
|
v = mdesc_get_property(hp, pn, "watchdog-max-timeout", NULL);
|
|
if (v)
|
|
printk("PLATFORM: watchdog-max-timeout [%llu ms]\n", *v);
|
|
v = mdesc_get_property(hp, pn, "max-cpus", NULL);
|
|
if (v) {
|
|
max_cpus = *v;
|
|
printk("PLATFORM: max-cpus [%llu]\n", max_cpus);
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
{
|
|
int max_cpu, i;
|
|
|
|
if (v) {
|
|
max_cpu = *v;
|
|
if (max_cpu > NR_CPUS)
|
|
max_cpu = NR_CPUS;
|
|
} else {
|
|
max_cpu = NR_CPUS;
|
|
}
|
|
for (i = 0; i < max_cpu; i++)
|
|
set_cpu_possible(i, true);
|
|
}
|
|
#endif
|
|
|
|
mdesc_release(hp);
|
|
}
|
|
|
|
static void fill_in_one_cache(cpuinfo_sparc *c, struct mdesc_handle *hp, u64 mp)
|
|
{
|
|
const u64 *level = mdesc_get_property(hp, mp, "level", NULL);
|
|
const u64 *size = mdesc_get_property(hp, mp, "size", NULL);
|
|
const u64 *line_size = mdesc_get_property(hp, mp, "line-size", NULL);
|
|
const char *type;
|
|
int type_len;
|
|
|
|
type = mdesc_get_property(hp, mp, "type", &type_len);
|
|
|
|
switch (*level) {
|
|
case 1:
|
|
if (of_find_in_proplist(type, "instn", type_len)) {
|
|
c->icache_size = *size;
|
|
c->icache_line_size = *line_size;
|
|
} else if (of_find_in_proplist(type, "data", type_len)) {
|
|
c->dcache_size = *size;
|
|
c->dcache_line_size = *line_size;
|
|
}
|
|
break;
|
|
|
|
case 2:
|
|
c->ecache_size = *size;
|
|
c->ecache_line_size = *line_size;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (*level == 1) {
|
|
u64 a;
|
|
|
|
mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
|
|
u64 target = mdesc_arc_target(hp, a);
|
|
const char *name = mdesc_node_name(hp, target);
|
|
|
|
if (!strcmp(name, "cache"))
|
|
fill_in_one_cache(c, hp, target);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void find_back_node_value(struct mdesc_handle *hp, u64 node,
|
|
char *srch_val,
|
|
void (*func)(struct mdesc_handle *, u64, int),
|
|
u64 val, int depth)
|
|
{
|
|
u64 arc;
|
|
|
|
/* Since we have an estimate of recursion depth, do a sanity check. */
|
|
if (depth == 0)
|
|
return;
|
|
|
|
mdesc_for_each_arc(arc, hp, node, MDESC_ARC_TYPE_BACK) {
|
|
u64 n = mdesc_arc_target(hp, arc);
|
|
const char *name = mdesc_node_name(hp, n);
|
|
|
|
if (!strcmp(srch_val, name))
|
|
(*func)(hp, n, val);
|
|
|
|
find_back_node_value(hp, n, srch_val, func, val, depth-1);
|
|
}
|
|
}
|
|
|
|
static void __mark_core_id(struct mdesc_handle *hp, u64 node,
|
|
int core_id)
|
|
{
|
|
const u64 *id = mdesc_get_property(hp, node, "id", NULL);
|
|
|
|
if (*id < num_possible_cpus())
|
|
cpu_data(*id).core_id = core_id;
|
|
}
|
|
|
|
static void __mark_max_cache_id(struct mdesc_handle *hp, u64 node,
|
|
int max_cache_id)
|
|
{
|
|
const u64 *id = mdesc_get_property(hp, node, "id", NULL);
|
|
|
|
if (*id < num_possible_cpus()) {
|
|
cpu_data(*id).max_cache_id = max_cache_id;
|
|
|
|
/**
|
|
* On systems without explicit socket descriptions socket
|
|
* is max_cache_id
|
|
*/
|
|
cpu_data(*id).sock_id = max_cache_id;
|
|
}
|
|
}
|
|
|
|
static void mark_core_ids(struct mdesc_handle *hp, u64 mp,
|
|
int core_id)
|
|
{
|
|
find_back_node_value(hp, mp, "cpu", __mark_core_id, core_id, 10);
|
|
}
|
|
|
|
static void mark_max_cache_ids(struct mdesc_handle *hp, u64 mp,
|
|
int max_cache_id)
|
|
{
|
|
find_back_node_value(hp, mp, "cpu", __mark_max_cache_id,
|
|
max_cache_id, 10);
|
|
}
|
|
|
|
static void set_core_ids(struct mdesc_handle *hp)
|
|
{
|
|
int idx;
|
|
u64 mp;
|
|
|
|
idx = 1;
|
|
|
|
/* Identify unique cores by looking for cpus backpointed to by
|
|
* level 1 instruction caches.
|
|
*/
|
|
mdesc_for_each_node_by_name(hp, mp, "cache") {
|
|
const u64 *level;
|
|
const char *type;
|
|
int len;
|
|
|
|
level = mdesc_get_property(hp, mp, "level", NULL);
|
|
if (*level != 1)
|
|
continue;
|
|
|
|
type = mdesc_get_property(hp, mp, "type", &len);
|
|
if (!of_find_in_proplist(type, "instn", len))
|
|
continue;
|
|
|
|
mark_core_ids(hp, mp, idx);
|
|
idx++;
|
|
}
|
|
}
|
|
|
|
static int set_max_cache_ids_by_cache(struct mdesc_handle *hp, int level)
|
|
{
|
|
u64 mp;
|
|
int idx = 1;
|
|
int fnd = 0;
|
|
|
|
/**
|
|
* Identify unique highest level of shared cache by looking for cpus
|
|
* backpointed to by shared level N caches.
|
|
*/
|
|
mdesc_for_each_node_by_name(hp, mp, "cache") {
|
|
const u64 *cur_lvl;
|
|
|
|
cur_lvl = mdesc_get_property(hp, mp, "level", NULL);
|
|
if (*cur_lvl != level)
|
|
continue;
|
|
mark_max_cache_ids(hp, mp, idx);
|
|
idx++;
|
|
fnd = 1;
|
|
}
|
|
return fnd;
|
|
}
|
|
|
|
static void set_sock_ids_by_socket(struct mdesc_handle *hp, u64 mp)
|
|
{
|
|
int idx = 1;
|
|
|
|
mdesc_for_each_node_by_name(hp, mp, "socket") {
|
|
u64 a;
|
|
|
|
mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
|
|
u64 t = mdesc_arc_target(hp, a);
|
|
const char *name;
|
|
const u64 *id;
|
|
|
|
name = mdesc_node_name(hp, t);
|
|
if (strcmp(name, "cpu"))
|
|
continue;
|
|
|
|
id = mdesc_get_property(hp, t, "id", NULL);
|
|
if (*id < num_possible_cpus())
|
|
cpu_data(*id).sock_id = idx;
|
|
}
|
|
idx++;
|
|
}
|
|
}
|
|
|
|
static void set_sock_ids(struct mdesc_handle *hp)
|
|
{
|
|
u64 mp;
|
|
|
|
/**
|
|
* Find the highest level of shared cache which pre-T7 is also
|
|
* the socket.
|
|
*/
|
|
if (!set_max_cache_ids_by_cache(hp, 3))
|
|
set_max_cache_ids_by_cache(hp, 2);
|
|
|
|
/* If machine description exposes sockets data use it.*/
|
|
mp = mdesc_node_by_name(hp, MDESC_NODE_NULL, "sockets");
|
|
if (mp != MDESC_NODE_NULL)
|
|
set_sock_ids_by_socket(hp, mp);
|
|
}
|
|
|
|
static void mark_proc_ids(struct mdesc_handle *hp, u64 mp, int proc_id)
|
|
{
|
|
u64 a;
|
|
|
|
mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) {
|
|
u64 t = mdesc_arc_target(hp, a);
|
|
const char *name;
|
|
const u64 *id;
|
|
|
|
name = mdesc_node_name(hp, t);
|
|
if (strcmp(name, "cpu"))
|
|
continue;
|
|
|
|
id = mdesc_get_property(hp, t, "id", NULL);
|
|
if (*id < NR_CPUS)
|
|
cpu_data(*id).proc_id = proc_id;
|
|
}
|
|
}
|
|
|
|
static void __set_proc_ids(struct mdesc_handle *hp, const char *exec_unit_name)
|
|
{
|
|
int idx;
|
|
u64 mp;
|
|
|
|
idx = 0;
|
|
mdesc_for_each_node_by_name(hp, mp, exec_unit_name) {
|
|
const char *type;
|
|
int len;
|
|
|
|
type = mdesc_get_property(hp, mp, "type", &len);
|
|
if (!of_find_in_proplist(type, "int", len) &&
|
|
!of_find_in_proplist(type, "integer", len))
|
|
continue;
|
|
|
|
mark_proc_ids(hp, mp, idx);
|
|
idx++;
|
|
}
|
|
}
|
|
|
|
static void set_proc_ids(struct mdesc_handle *hp)
|
|
{
|
|
__set_proc_ids(hp, "exec_unit");
|
|
__set_proc_ids(hp, "exec-unit");
|
|
}
|
|
|
|
static void get_one_mondo_bits(const u64 *p, unsigned int *mask,
|
|
unsigned long def, unsigned long max)
|
|
{
|
|
u64 val;
|
|
|
|
if (!p)
|
|
goto use_default;
|
|
val = *p;
|
|
|
|
if (!val || val >= 64)
|
|
goto use_default;
|
|
|
|
if (val > max)
|
|
val = max;
|
|
|
|
*mask = ((1U << val) * 64U) - 1U;
|
|
return;
|
|
|
|
use_default:
|
|
*mask = ((1U << def) * 64U) - 1U;
|
|
}
|
|
|
|
static void get_mondo_data(struct mdesc_handle *hp, u64 mp,
|
|
struct trap_per_cpu *tb)
|
|
{
|
|
static int printed;
|
|
const u64 *val;
|
|
|
|
val = mdesc_get_property(hp, mp, "q-cpu-mondo-#bits", NULL);
|
|
get_one_mondo_bits(val, &tb->cpu_mondo_qmask, 7, ilog2(max_cpus * 2));
|
|
|
|
val = mdesc_get_property(hp, mp, "q-dev-mondo-#bits", NULL);
|
|
get_one_mondo_bits(val, &tb->dev_mondo_qmask, 7, 8);
|
|
|
|
val = mdesc_get_property(hp, mp, "q-resumable-#bits", NULL);
|
|
get_one_mondo_bits(val, &tb->resum_qmask, 6, 7);
|
|
|
|
val = mdesc_get_property(hp, mp, "q-nonresumable-#bits", NULL);
|
|
get_one_mondo_bits(val, &tb->nonresum_qmask, 2, 2);
|
|
if (!printed++) {
|
|
pr_info("SUN4V: Mondo queue sizes "
|
|
"[cpu(%u) dev(%u) r(%u) nr(%u)]\n",
|
|
tb->cpu_mondo_qmask + 1,
|
|
tb->dev_mondo_qmask + 1,
|
|
tb->resum_qmask + 1,
|
|
tb->nonresum_qmask + 1);
|
|
}
|
|
}
|
|
|
|
static void *mdesc_iterate_over_cpus(void *(*func)(struct mdesc_handle *, u64, int, void *), void *arg, cpumask_t *mask)
|
|
{
|
|
struct mdesc_handle *hp = mdesc_grab();
|
|
void *ret = NULL;
|
|
u64 mp;
|
|
|
|
mdesc_for_each_node_by_name(hp, mp, "cpu") {
|
|
const u64 *id = mdesc_get_property(hp, mp, "id", NULL);
|
|
int cpuid = *id;
|
|
|
|
#ifdef CONFIG_SMP
|
|
if (cpuid >= NR_CPUS) {
|
|
printk(KERN_WARNING "Ignoring CPU %d which is "
|
|
">= NR_CPUS (%d)\n",
|
|
cpuid, NR_CPUS);
|
|
continue;
|
|
}
|
|
if (!cpumask_test_cpu(cpuid, mask))
|
|
continue;
|
|
#endif
|
|
|
|
ret = func(hp, mp, cpuid, arg);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
out:
|
|
mdesc_release(hp);
|
|
return ret;
|
|
}
|
|
|
|
static void *record_one_cpu(struct mdesc_handle *hp, u64 mp, int cpuid,
|
|
void *arg)
|
|
{
|
|
ncpus_probed++;
|
|
#ifdef CONFIG_SMP
|
|
set_cpu_present(cpuid, true);
|
|
#endif
|
|
return NULL;
|
|
}
|
|
|
|
void mdesc_populate_present_mask(cpumask_t *mask)
|
|
{
|
|
if (tlb_type != hypervisor)
|
|
return;
|
|
|
|
ncpus_probed = 0;
|
|
mdesc_iterate_over_cpus(record_one_cpu, NULL, mask);
|
|
}
|
|
|
|
static void * __init check_one_pgsz(struct mdesc_handle *hp, u64 mp, int cpuid, void *arg)
|
|
{
|
|
const u64 *pgsz_prop = mdesc_get_property(hp, mp, "mmu-page-size-list", NULL);
|
|
unsigned long *pgsz_mask = arg;
|
|
u64 val;
|
|
|
|
val = (HV_PGSZ_MASK_8K | HV_PGSZ_MASK_64K |
|
|
HV_PGSZ_MASK_512K | HV_PGSZ_MASK_4MB);
|
|
if (pgsz_prop)
|
|
val = *pgsz_prop;
|
|
|
|
if (!*pgsz_mask)
|
|
*pgsz_mask = val;
|
|
else
|
|
*pgsz_mask &= val;
|
|
return NULL;
|
|
}
|
|
|
|
void __init mdesc_get_page_sizes(cpumask_t *mask, unsigned long *pgsz_mask)
|
|
{
|
|
*pgsz_mask = 0;
|
|
mdesc_iterate_over_cpus(check_one_pgsz, pgsz_mask, mask);
|
|
}
|
|
|
|
static void *fill_in_one_cpu(struct mdesc_handle *hp, u64 mp, int cpuid,
|
|
void *arg)
|
|
{
|
|
const u64 *cfreq = mdesc_get_property(hp, mp, "clock-frequency", NULL);
|
|
struct trap_per_cpu *tb;
|
|
cpuinfo_sparc *c;
|
|
u64 a;
|
|
|
|
#ifndef CONFIG_SMP
|
|
/* On uniprocessor we only want the values for the
|
|
* real physical cpu the kernel booted onto, however
|
|
* cpu_data() only has one entry at index 0.
|
|
*/
|
|
if (cpuid != real_hard_smp_processor_id())
|
|
return NULL;
|
|
cpuid = 0;
|
|
#endif
|
|
|
|
c = &cpu_data(cpuid);
|
|
c->clock_tick = *cfreq;
|
|
|
|
tb = &trap_block[cpuid];
|
|
get_mondo_data(hp, mp, tb);
|
|
|
|
mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
|
|
u64 j, t = mdesc_arc_target(hp, a);
|
|
const char *t_name;
|
|
|
|
t_name = mdesc_node_name(hp, t);
|
|
if (!strcmp(t_name, "cache")) {
|
|
fill_in_one_cache(c, hp, t);
|
|
continue;
|
|
}
|
|
|
|
mdesc_for_each_arc(j, hp, t, MDESC_ARC_TYPE_FWD) {
|
|
u64 n = mdesc_arc_target(hp, j);
|
|
const char *n_name;
|
|
|
|
n_name = mdesc_node_name(hp, n);
|
|
if (!strcmp(n_name, "cache"))
|
|
fill_in_one_cache(c, hp, n);
|
|
}
|
|
}
|
|
|
|
c->core_id = 0;
|
|
c->proc_id = -1;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void mdesc_fill_in_cpu_data(cpumask_t *mask)
|
|
{
|
|
struct mdesc_handle *hp;
|
|
|
|
mdesc_iterate_over_cpus(fill_in_one_cpu, NULL, mask);
|
|
|
|
hp = mdesc_grab();
|
|
|
|
set_core_ids(hp);
|
|
set_proc_ids(hp);
|
|
set_sock_ids(hp);
|
|
|
|
mdesc_release(hp);
|
|
|
|
smp_fill_in_sib_core_maps();
|
|
}
|
|
|
|
/* mdesc_open() - Grab a reference to mdesc_handle when /dev/mdesc is
|
|
* opened. Hold this reference until /dev/mdesc is closed to ensure
|
|
* mdesc data structure is not released underneath us. Store the
|
|
* pointer to mdesc structure in private_data for read and seek to use
|
|
*/
|
|
static int mdesc_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct mdesc_handle *hp = mdesc_grab();
|
|
|
|
if (!hp)
|
|
return -ENODEV;
|
|
|
|
file->private_data = hp;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t mdesc_read(struct file *file, char __user *buf,
|
|
size_t len, loff_t *offp)
|
|
{
|
|
struct mdesc_handle *hp = file->private_data;
|
|
unsigned char *mdesc;
|
|
int bytes_left, count = len;
|
|
|
|
if (*offp >= hp->handle_size)
|
|
return 0;
|
|
|
|
bytes_left = hp->handle_size - *offp;
|
|
if (count > bytes_left)
|
|
count = bytes_left;
|
|
|
|
mdesc = (unsigned char *)&hp->mdesc;
|
|
mdesc += *offp;
|
|
if (!copy_to_user(buf, mdesc, count)) {
|
|
*offp += count;
|
|
return count;
|
|
} else {
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
|
|
static loff_t mdesc_llseek(struct file *file, loff_t offset, int whence)
|
|
{
|
|
struct mdesc_handle *hp = file->private_data;
|
|
|
|
return no_seek_end_llseek_size(file, offset, whence, hp->handle_size);
|
|
}
|
|
|
|
/* mdesc_close() - /dev/mdesc is being closed, release the reference to
|
|
* mdesc structure.
|
|
*/
|
|
static int mdesc_close(struct inode *inode, struct file *file)
|
|
{
|
|
mdesc_release(file->private_data);
|
|
return 0;
|
|
}
|
|
|
|
static const struct file_operations mdesc_fops = {
|
|
.open = mdesc_open,
|
|
.read = mdesc_read,
|
|
.llseek = mdesc_llseek,
|
|
.release = mdesc_close,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static struct miscdevice mdesc_misc = {
|
|
.minor = MISC_DYNAMIC_MINOR,
|
|
.name = "mdesc",
|
|
.fops = &mdesc_fops,
|
|
};
|
|
|
|
static int __init mdesc_misc_init(void)
|
|
{
|
|
return misc_register(&mdesc_misc);
|
|
}
|
|
|
|
__initcall(mdesc_misc_init);
|
|
|
|
void __init sun4v_mdesc_init(void)
|
|
{
|
|
struct mdesc_handle *hp;
|
|
unsigned long len, real_len, status;
|
|
|
|
(void) sun4v_mach_desc(0UL, 0UL, &len);
|
|
|
|
printk("MDESC: Size is %lu bytes.\n", len);
|
|
|
|
hp = mdesc_alloc(len, &memblock_mdesc_ops);
|
|
if (hp == NULL) {
|
|
prom_printf("MDESC: alloc of %lu bytes failed.\n", len);
|
|
prom_halt();
|
|
}
|
|
|
|
status = sun4v_mach_desc(__pa(&hp->mdesc), len, &real_len);
|
|
if (status != HV_EOK || real_len > len) {
|
|
prom_printf("sun4v_mach_desc fails, err(%lu), "
|
|
"len(%lu), real_len(%lu)\n",
|
|
status, len, real_len);
|
|
mdesc_free(hp);
|
|
prom_halt();
|
|
}
|
|
|
|
cur_mdesc = hp;
|
|
|
|
report_platform_properties();
|
|
}
|