1005 lines
23 KiB
C
Executable file
1005 lines
23 KiB
C
Executable file
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2004-2006 Silicon Graphics, Inc. All rights reserved.
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*
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* SGI Altix topology and hardware performance monitoring API.
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* Mark Goodwin <markgw@sgi.com>.
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*
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* Creates /proc/sgi_sn/sn_topology (read-only) to export
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* info about Altix nodes, routers, CPUs and NumaLink
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* interconnection/topology.
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*
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* Also creates a dynamic misc device named "sn_hwperf"
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* that supports an ioctl interface to call down into SAL
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* to discover hw objects, topology and to read/write
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* memory mapped registers, e.g. for performance monitoring.
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* The "sn_hwperf" device is registered only after the procfs
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* file is first opened, i.e. only if/when it's needed.
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*
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* This API is used by SGI Performance Co-Pilot and other
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* tools, see http://oss.sgi.com/projects/pcp
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*/
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#include <linux/fs.h>
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#include <linux/slab.h>
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#include <linux/export.h>
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#include <linux/vmalloc.h>
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#include <linux/seq_file.h>
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#include <linux/miscdevice.h>
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#include <linux/utsname.h>
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#include <linux/cpumask.h>
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#include <linux/nodemask.h>
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#include <linux/smp.h>
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#include <linux/mutex.h>
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#include <asm/processor.h>
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#include <asm/topology.h>
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#include <linux/uaccess.h>
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#include <asm/sal.h>
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#include <asm/sn/io.h>
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#include <asm/sn/sn_sal.h>
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#include <asm/sn/module.h>
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#include <asm/sn/geo.h>
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#include <asm/sn/sn2/sn_hwperf.h>
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#include <asm/sn/addrs.h>
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static void *sn_hwperf_salheap = NULL;
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static int sn_hwperf_obj_cnt = 0;
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static nasid_t sn_hwperf_master_nasid = INVALID_NASID;
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static int sn_hwperf_init(void);
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static DEFINE_MUTEX(sn_hwperf_init_mutex);
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#define cnode_possible(n) ((n) < num_cnodes)
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static int sn_hwperf_enum_objects(int *nobj, struct sn_hwperf_object_info **ret)
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{
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int e;
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u64 sz;
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struct sn_hwperf_object_info *objbuf = NULL;
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if ((e = sn_hwperf_init()) < 0) {
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printk(KERN_ERR "sn_hwperf_init failed: err %d\n", e);
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goto out;
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}
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sz = sn_hwperf_obj_cnt * sizeof(struct sn_hwperf_object_info);
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objbuf = vmalloc(sz);
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if (objbuf == NULL) {
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printk("sn_hwperf_enum_objects: vmalloc(%d) failed\n", (int)sz);
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e = -ENOMEM;
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goto out;
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}
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e = ia64_sn_hwperf_op(sn_hwperf_master_nasid, SN_HWPERF_ENUM_OBJECTS,
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0, sz, (u64) objbuf, 0, 0, NULL);
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if (e != SN_HWPERF_OP_OK) {
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e = -EINVAL;
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vfree(objbuf);
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}
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out:
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*nobj = sn_hwperf_obj_cnt;
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*ret = objbuf;
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return e;
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}
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static int sn_hwperf_location_to_bpos(char *location,
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int *rack, int *bay, int *slot, int *slab)
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{
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char type;
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/* first scan for an old style geoid string */
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if (sscanf(location, "%03d%c%02d#%d",
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rack, &type, bay, slab) == 4)
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*slot = 0;
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else /* scan for a new bladed geoid string */
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if (sscanf(location, "%03d%c%02d^%02d#%d",
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rack, &type, bay, slot, slab) != 5)
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return -1;
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/* success */
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return 0;
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}
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static int sn_hwperf_geoid_to_cnode(char *location)
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{
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int cnode;
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geoid_t geoid;
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moduleid_t module_id;
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int rack, bay, slot, slab;
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int this_rack, this_bay, this_slot, this_slab;
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if (sn_hwperf_location_to_bpos(location, &rack, &bay, &slot, &slab))
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return -1;
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/*
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* FIXME: replace with cleaner for_each_XXX macro which addresses
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* both compute and IO nodes once ACPI3.0 is available.
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*/
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for (cnode = 0; cnode < num_cnodes; cnode++) {
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geoid = cnodeid_get_geoid(cnode);
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module_id = geo_module(geoid);
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this_rack = MODULE_GET_RACK(module_id);
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this_bay = MODULE_GET_BPOS(module_id);
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this_slot = geo_slot(geoid);
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this_slab = geo_slab(geoid);
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if (rack == this_rack && bay == this_bay &&
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slot == this_slot && slab == this_slab) {
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break;
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}
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}
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return cnode_possible(cnode) ? cnode : -1;
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}
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static int sn_hwperf_obj_to_cnode(struct sn_hwperf_object_info * obj)
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{
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if (!SN_HWPERF_IS_NODE(obj) && !SN_HWPERF_IS_IONODE(obj))
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BUG();
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if (SN_HWPERF_FOREIGN(obj))
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return -1;
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return sn_hwperf_geoid_to_cnode(obj->location);
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}
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static int sn_hwperf_generic_ordinal(struct sn_hwperf_object_info *obj,
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struct sn_hwperf_object_info *objs)
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{
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int ordinal;
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struct sn_hwperf_object_info *p;
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for (ordinal=0, p=objs; p != obj; p++) {
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if (SN_HWPERF_FOREIGN(p))
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continue;
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if (SN_HWPERF_SAME_OBJTYPE(p, obj))
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ordinal++;
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}
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return ordinal;
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}
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static const char *slabname_node = "node"; /* SHub asic */
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static const char *slabname_ionode = "ionode"; /* TIO asic */
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static const char *slabname_router = "router"; /* NL3R or NL4R */
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static const char *slabname_other = "other"; /* unknown asic */
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static const char *sn_hwperf_get_slabname(struct sn_hwperf_object_info *obj,
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struct sn_hwperf_object_info *objs, int *ordinal)
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{
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int isnode;
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const char *slabname = slabname_other;
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if ((isnode = SN_HWPERF_IS_NODE(obj)) || SN_HWPERF_IS_IONODE(obj)) {
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slabname = isnode ? slabname_node : slabname_ionode;
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*ordinal = sn_hwperf_obj_to_cnode(obj);
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}
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else {
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*ordinal = sn_hwperf_generic_ordinal(obj, objs);
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if (SN_HWPERF_IS_ROUTER(obj))
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slabname = slabname_router;
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}
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return slabname;
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}
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static void print_pci_topology(struct seq_file *s)
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{
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char *p;
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size_t sz;
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int e;
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for (sz = PAGE_SIZE; sz < 16 * PAGE_SIZE; sz += PAGE_SIZE) {
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if (!(p = kmalloc(sz, GFP_KERNEL)))
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break;
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e = ia64_sn_ioif_get_pci_topology(__pa(p), sz);
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if (e == SALRET_OK)
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seq_puts(s, p);
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kfree(p);
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if (e == SALRET_OK || e == SALRET_NOT_IMPLEMENTED)
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break;
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}
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}
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static inline int sn_hwperf_has_cpus(cnodeid_t node)
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{
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return node < MAX_NUMNODES && node_online(node) && nr_cpus_node(node);
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}
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static inline int sn_hwperf_has_mem(cnodeid_t node)
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{
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return node < MAX_NUMNODES && node_online(node) && NODE_DATA(node)->node_present_pages;
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}
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static struct sn_hwperf_object_info *
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sn_hwperf_findobj_id(struct sn_hwperf_object_info *objbuf,
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int nobj, int id)
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{
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int i;
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struct sn_hwperf_object_info *p = objbuf;
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for (i=0; i < nobj; i++, p++) {
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if (p->id == id)
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return p;
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}
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return NULL;
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}
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static int sn_hwperf_get_nearest_node_objdata(struct sn_hwperf_object_info *objbuf,
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int nobj, cnodeid_t node, cnodeid_t *near_mem_node, cnodeid_t *near_cpu_node)
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{
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int e;
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struct sn_hwperf_object_info *nodeobj = NULL;
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struct sn_hwperf_object_info *op;
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struct sn_hwperf_object_info *dest;
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struct sn_hwperf_object_info *router;
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struct sn_hwperf_port_info ptdata[16];
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int sz, i, j;
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cnodeid_t c;
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int found_mem = 0;
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int found_cpu = 0;
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if (!cnode_possible(node))
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return -EINVAL;
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if (sn_hwperf_has_cpus(node)) {
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if (near_cpu_node)
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*near_cpu_node = node;
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found_cpu++;
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}
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if (sn_hwperf_has_mem(node)) {
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if (near_mem_node)
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*near_mem_node = node;
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found_mem++;
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}
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if (found_cpu && found_mem)
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return 0; /* trivially successful */
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/* find the argument node object */
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for (i=0, op=objbuf; i < nobj; i++, op++) {
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if (!SN_HWPERF_IS_NODE(op) && !SN_HWPERF_IS_IONODE(op))
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continue;
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if (node == sn_hwperf_obj_to_cnode(op)) {
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nodeobj = op;
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break;
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}
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}
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if (!nodeobj) {
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e = -ENOENT;
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goto err;
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}
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/* get it's interconnect topology */
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sz = op->ports * sizeof(struct sn_hwperf_port_info);
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BUG_ON(sz > sizeof(ptdata));
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e = ia64_sn_hwperf_op(sn_hwperf_master_nasid,
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SN_HWPERF_ENUM_PORTS, nodeobj->id, sz,
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(u64)&ptdata, 0, 0, NULL);
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if (e != SN_HWPERF_OP_OK) {
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e = -EINVAL;
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goto err;
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}
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/* find nearest node with cpus and nearest memory */
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for (router=NULL, j=0; j < op->ports; j++) {
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dest = sn_hwperf_findobj_id(objbuf, nobj, ptdata[j].conn_id);
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if (dest && SN_HWPERF_IS_ROUTER(dest))
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router = dest;
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if (!dest || SN_HWPERF_FOREIGN(dest) ||
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!SN_HWPERF_IS_NODE(dest) || SN_HWPERF_IS_IONODE(dest)) {
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continue;
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}
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c = sn_hwperf_obj_to_cnode(dest);
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if (!found_cpu && sn_hwperf_has_cpus(c)) {
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if (near_cpu_node)
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*near_cpu_node = c;
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found_cpu++;
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}
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if (!found_mem && sn_hwperf_has_mem(c)) {
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if (near_mem_node)
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*near_mem_node = c;
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found_mem++;
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}
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}
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if (router && (!found_cpu || !found_mem)) {
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/* search for a node connected to the same router */
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sz = router->ports * sizeof(struct sn_hwperf_port_info);
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BUG_ON(sz > sizeof(ptdata));
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e = ia64_sn_hwperf_op(sn_hwperf_master_nasid,
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SN_HWPERF_ENUM_PORTS, router->id, sz,
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(u64)&ptdata, 0, 0, NULL);
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if (e != SN_HWPERF_OP_OK) {
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e = -EINVAL;
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goto err;
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}
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for (j=0; j < router->ports; j++) {
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dest = sn_hwperf_findobj_id(objbuf, nobj,
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ptdata[j].conn_id);
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if (!dest || dest->id == node ||
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SN_HWPERF_FOREIGN(dest) ||
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!SN_HWPERF_IS_NODE(dest) ||
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SN_HWPERF_IS_IONODE(dest)) {
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continue;
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}
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c = sn_hwperf_obj_to_cnode(dest);
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if (!found_cpu && sn_hwperf_has_cpus(c)) {
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if (near_cpu_node)
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*near_cpu_node = c;
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found_cpu++;
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}
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if (!found_mem && sn_hwperf_has_mem(c)) {
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if (near_mem_node)
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*near_mem_node = c;
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found_mem++;
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}
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if (found_cpu && found_mem)
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break;
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}
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}
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if (!found_cpu || !found_mem) {
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/* resort to _any_ node with CPUs and memory */
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for (i=0, op=objbuf; i < nobj; i++, op++) {
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if (SN_HWPERF_FOREIGN(op) ||
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SN_HWPERF_IS_IONODE(op) ||
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!SN_HWPERF_IS_NODE(op)) {
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continue;
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}
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c = sn_hwperf_obj_to_cnode(op);
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if (!found_cpu && sn_hwperf_has_cpus(c)) {
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if (near_cpu_node)
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*near_cpu_node = c;
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found_cpu++;
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}
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if (!found_mem && sn_hwperf_has_mem(c)) {
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if (near_mem_node)
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*near_mem_node = c;
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found_mem++;
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}
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if (found_cpu && found_mem)
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break;
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}
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}
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if (!found_cpu || !found_mem)
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e = -ENODATA;
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err:
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return e;
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}
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static int sn_topology_show(struct seq_file *s, void *d)
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{
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int sz;
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int pt;
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int e = 0;
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int i;
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int j;
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const char *slabname;
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int ordinal;
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char slice;
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struct cpuinfo_ia64 *c;
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struct sn_hwperf_port_info *ptdata;
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struct sn_hwperf_object_info *p;
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struct sn_hwperf_object_info *obj = d; /* this object */
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struct sn_hwperf_object_info *objs = s->private; /* all objects */
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u8 shubtype;
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u8 system_size;
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u8 sharing_size;
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u8 partid;
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u8 coher;
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u8 nasid_shift;
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u8 region_size;
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u16 nasid_mask;
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int nasid_msb;
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if (obj == objs) {
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seq_printf(s, "# sn_topology version 2\n");
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seq_printf(s, "# objtype ordinal location partition"
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" [attribute value [, ...]]\n");
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if (ia64_sn_get_sn_info(0,
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&shubtype, &nasid_mask, &nasid_shift, &system_size,
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&sharing_size, &partid, &coher, ®ion_size))
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BUG();
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for (nasid_msb=63; nasid_msb > 0; nasid_msb--) {
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if (((u64)nasid_mask << nasid_shift) & (1ULL << nasid_msb))
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break;
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}
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seq_printf(s, "partition %u %s local "
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"shubtype %s, "
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"nasid_mask 0x%016llx, "
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"nasid_bits %d:%d, "
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"system_size %d, "
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"sharing_size %d, "
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"coherency_domain %d, "
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"region_size %d\n",
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partid, utsname()->nodename,
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shubtype ? "shub2" : "shub1",
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(u64)nasid_mask << nasid_shift, nasid_msb, nasid_shift,
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system_size, sharing_size, coher, region_size);
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print_pci_topology(s);
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}
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if (SN_HWPERF_FOREIGN(obj)) {
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/* private in another partition: not interesting */
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return 0;
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}
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for (i = 0; i < SN_HWPERF_MAXSTRING && obj->name[i]; i++) {
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if (obj->name[i] == ' ')
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obj->name[i] = '_';
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}
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slabname = sn_hwperf_get_slabname(obj, objs, &ordinal);
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seq_printf(s, "%s %d %s %s asic %s", slabname, ordinal, obj->location,
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obj->sn_hwp_this_part ? "local" : "shared", obj->name);
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if (ordinal < 0 || (!SN_HWPERF_IS_NODE(obj) && !SN_HWPERF_IS_IONODE(obj)))
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seq_putc(s, '\n');
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else {
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cnodeid_t near_mem = -1;
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cnodeid_t near_cpu = -1;
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seq_printf(s, ", nasid 0x%x", cnodeid_to_nasid(ordinal));
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if (sn_hwperf_get_nearest_node_objdata(objs, sn_hwperf_obj_cnt,
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ordinal, &near_mem, &near_cpu) == 0) {
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seq_printf(s, ", near_mem_nodeid %d, near_cpu_nodeid %d",
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near_mem, near_cpu);
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}
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if (!SN_HWPERF_IS_IONODE(obj)) {
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for_each_online_node(i) {
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seq_printf(s, i ? ":%d" : ", dist %d",
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node_distance(ordinal, i));
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}
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}
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seq_putc(s, '\n');
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/*
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* CPUs on this node, if any
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*/
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if (!SN_HWPERF_IS_IONODE(obj)) {
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for_each_cpu_and(i, cpu_online_mask,
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cpumask_of_node(ordinal)) {
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slice = 'a' + cpuid_to_slice(i);
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c = cpu_data(i);
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seq_printf(s, "cpu %d %s%c local"
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" freq %luMHz, arch ia64",
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i, obj->location, slice,
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c->proc_freq / 1000000);
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for_each_online_cpu(j) {
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seq_printf(s, j ? ":%d" : ", dist %d",
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node_distance(
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cpu_to_node(i),
|
|
cpu_to_node(j)));
|
|
}
|
|
seq_putc(s, '\n');
|
|
}
|
|
}
|
|
}
|
|
|
|
if (obj->ports) {
|
|
/*
|
|
* numalink ports
|
|
*/
|
|
sz = obj->ports * sizeof(struct sn_hwperf_port_info);
|
|
if ((ptdata = kmalloc(sz, GFP_KERNEL)) == NULL)
|
|
return -ENOMEM;
|
|
e = ia64_sn_hwperf_op(sn_hwperf_master_nasid,
|
|
SN_HWPERF_ENUM_PORTS, obj->id, sz,
|
|
(u64) ptdata, 0, 0, NULL);
|
|
if (e != SN_HWPERF_OP_OK)
|
|
return -EINVAL;
|
|
for (ordinal=0, p=objs; p != obj; p++) {
|
|
if (!SN_HWPERF_FOREIGN(p))
|
|
ordinal += p->ports;
|
|
}
|
|
for (pt = 0; pt < obj->ports; pt++) {
|
|
for (p = objs, i = 0; i < sn_hwperf_obj_cnt; i++, p++) {
|
|
if (ptdata[pt].conn_id == p->id) {
|
|
break;
|
|
}
|
|
}
|
|
seq_printf(s, "numalink %d %s-%d",
|
|
ordinal+pt, obj->location, ptdata[pt].port);
|
|
|
|
if (i >= sn_hwperf_obj_cnt) {
|
|
/* no connection */
|
|
seq_puts(s, " local endpoint disconnected"
|
|
", protocol unknown\n");
|
|
continue;
|
|
}
|
|
|
|
if (obj->sn_hwp_this_part && p->sn_hwp_this_part)
|
|
/* both ends local to this partition */
|
|
seq_puts(s, " local");
|
|
else if (SN_HWPERF_FOREIGN(p))
|
|
/* both ends of the link in foreign partition */
|
|
seq_puts(s, " foreign");
|
|
else
|
|
/* link straddles a partition */
|
|
seq_puts(s, " shared");
|
|
|
|
/*
|
|
* Unlikely, but strictly should query the LLP config
|
|
* registers because an NL4R can be configured to run
|
|
* NL3 protocol, even when not talking to an NL3 router.
|
|
* Ditto for node-node.
|
|
*/
|
|
seq_printf(s, " endpoint %s-%d, protocol %s\n",
|
|
p->location, ptdata[pt].conn_port,
|
|
(SN_HWPERF_IS_NL3ROUTER(obj) ||
|
|
SN_HWPERF_IS_NL3ROUTER(p)) ? "LLP3" : "LLP4");
|
|
}
|
|
kfree(ptdata);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void *sn_topology_start(struct seq_file *s, loff_t * pos)
|
|
{
|
|
struct sn_hwperf_object_info *objs = s->private;
|
|
|
|
if (*pos < sn_hwperf_obj_cnt)
|
|
return (void *)(objs + *pos);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void *sn_topology_next(struct seq_file *s, void *v, loff_t * pos)
|
|
{
|
|
++*pos;
|
|
return sn_topology_start(s, pos);
|
|
}
|
|
|
|
static void sn_topology_stop(struct seq_file *m, void *v)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* /proc/sgi_sn/sn_topology, read-only using seq_file
|
|
*/
|
|
static const struct seq_operations sn_topology_seq_ops = {
|
|
.start = sn_topology_start,
|
|
.next = sn_topology_next,
|
|
.stop = sn_topology_stop,
|
|
.show = sn_topology_show
|
|
};
|
|
|
|
struct sn_hwperf_op_info {
|
|
u64 op;
|
|
struct sn_hwperf_ioctl_args *a;
|
|
void *p;
|
|
int *v0;
|
|
int ret;
|
|
};
|
|
|
|
static void sn_hwperf_call_sal(void *info)
|
|
{
|
|
struct sn_hwperf_op_info *op_info = info;
|
|
int r;
|
|
|
|
r = ia64_sn_hwperf_op(sn_hwperf_master_nasid, op_info->op,
|
|
op_info->a->arg, op_info->a->sz,
|
|
(u64) op_info->p, 0, 0, op_info->v0);
|
|
op_info->ret = r;
|
|
}
|
|
|
|
static long sn_hwperf_call_sal_work(void *info)
|
|
{
|
|
sn_hwperf_call_sal(info);
|
|
return 0;
|
|
}
|
|
|
|
static int sn_hwperf_op_cpu(struct sn_hwperf_op_info *op_info)
|
|
{
|
|
u32 cpu;
|
|
u32 use_ipi;
|
|
int r = 0;
|
|
|
|
cpu = (op_info->a->arg & SN_HWPERF_ARG_CPU_MASK) >> 32;
|
|
use_ipi = op_info->a->arg & SN_HWPERF_ARG_USE_IPI_MASK;
|
|
op_info->a->arg &= SN_HWPERF_ARG_OBJID_MASK;
|
|
|
|
if (cpu != SN_HWPERF_ARG_ANY_CPU) {
|
|
if (cpu >= nr_cpu_ids || !cpu_online(cpu)) {
|
|
r = -EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (cpu == SN_HWPERF_ARG_ANY_CPU) {
|
|
/* don't care which cpu */
|
|
sn_hwperf_call_sal(op_info);
|
|
} else if (cpu == get_cpu()) {
|
|
/* already on correct cpu */
|
|
sn_hwperf_call_sal(op_info);
|
|
put_cpu();
|
|
} else {
|
|
put_cpu();
|
|
if (use_ipi) {
|
|
/* use an interprocessor interrupt to call SAL */
|
|
smp_call_function_single(cpu, sn_hwperf_call_sal,
|
|
op_info, 1);
|
|
} else {
|
|
/* Call on the target CPU */
|
|
work_on_cpu_safe(cpu, sn_hwperf_call_sal_work, op_info);
|
|
}
|
|
}
|
|
r = op_info->ret;
|
|
|
|
out:
|
|
return r;
|
|
}
|
|
|
|
/* map SAL hwperf error code to system error code */
|
|
static int sn_hwperf_map_err(int hwperf_err)
|
|
{
|
|
int e;
|
|
|
|
switch(hwperf_err) {
|
|
case SN_HWPERF_OP_OK:
|
|
e = 0;
|
|
break;
|
|
|
|
case SN_HWPERF_OP_NOMEM:
|
|
e = -ENOMEM;
|
|
break;
|
|
|
|
case SN_HWPERF_OP_NO_PERM:
|
|
e = -EPERM;
|
|
break;
|
|
|
|
case SN_HWPERF_OP_IO_ERROR:
|
|
e = -EIO;
|
|
break;
|
|
|
|
case SN_HWPERF_OP_BUSY:
|
|
e = -EBUSY;
|
|
break;
|
|
|
|
case SN_HWPERF_OP_RECONFIGURE:
|
|
e = -EAGAIN;
|
|
break;
|
|
|
|
case SN_HWPERF_OP_INVAL:
|
|
default:
|
|
e = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return e;
|
|
}
|
|
|
|
/*
|
|
* ioctl for "sn_hwperf" misc device
|
|
*/
|
|
static long sn_hwperf_ioctl(struct file *fp, u32 op, unsigned long arg)
|
|
{
|
|
struct sn_hwperf_ioctl_args a;
|
|
struct cpuinfo_ia64 *cdata;
|
|
struct sn_hwperf_object_info *objs;
|
|
struct sn_hwperf_object_info *cpuobj;
|
|
struct sn_hwperf_op_info op_info;
|
|
void *p = NULL;
|
|
int nobj;
|
|
char slice;
|
|
int node;
|
|
int r;
|
|
int v0;
|
|
int i;
|
|
int j;
|
|
|
|
/* only user requests are allowed here */
|
|
if ((op & SN_HWPERF_OP_MASK) < 10) {
|
|
r = -EINVAL;
|
|
goto error;
|
|
}
|
|
r = copy_from_user(&a, (const void __user *)arg,
|
|
sizeof(struct sn_hwperf_ioctl_args));
|
|
if (r != 0) {
|
|
r = -EFAULT;
|
|
goto error;
|
|
}
|
|
|
|
/*
|
|
* Allocate memory to hold a kernel copy of the user buffer. The
|
|
* buffer contents are either copied in or out (or both) of user
|
|
* space depending on the flags encoded in the requested operation.
|
|
*/
|
|
if (a.ptr) {
|
|
p = vmalloc(a.sz);
|
|
if (!p) {
|
|
r = -ENOMEM;
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
if (op & SN_HWPERF_OP_MEM_COPYIN) {
|
|
r = copy_from_user(p, (const void __user *)a.ptr, a.sz);
|
|
if (r != 0) {
|
|
r = -EFAULT;
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
switch (op) {
|
|
case SN_HWPERF_GET_CPU_INFO:
|
|
if (a.sz == sizeof(u64)) {
|
|
/* special case to get size needed */
|
|
*(u64 *) p = (u64) num_online_cpus() *
|
|
sizeof(struct sn_hwperf_object_info);
|
|
} else
|
|
if (a.sz < num_online_cpus() * sizeof(struct sn_hwperf_object_info)) {
|
|
r = -ENOMEM;
|
|
goto error;
|
|
} else
|
|
if ((r = sn_hwperf_enum_objects(&nobj, &objs)) == 0) {
|
|
int cpuobj_index = 0;
|
|
|
|
memset(p, 0, a.sz);
|
|
for (i = 0; i < nobj; i++) {
|
|
if (!SN_HWPERF_IS_NODE(objs + i))
|
|
continue;
|
|
node = sn_hwperf_obj_to_cnode(objs + i);
|
|
for_each_online_cpu(j) {
|
|
if (node != cpu_to_node(j))
|
|
continue;
|
|
cpuobj = (struct sn_hwperf_object_info *) p + cpuobj_index++;
|
|
slice = 'a' + cpuid_to_slice(j);
|
|
cdata = cpu_data(j);
|
|
cpuobj->id = j;
|
|
snprintf(cpuobj->name,
|
|
sizeof(cpuobj->name),
|
|
"CPU %luMHz %s",
|
|
cdata->proc_freq / 1000000,
|
|
cdata->vendor);
|
|
snprintf(cpuobj->location,
|
|
sizeof(cpuobj->location),
|
|
"%s%c", objs[i].location,
|
|
slice);
|
|
}
|
|
}
|
|
|
|
vfree(objs);
|
|
}
|
|
break;
|
|
|
|
case SN_HWPERF_GET_NODE_NASID:
|
|
if (a.sz != sizeof(u64) ||
|
|
(node = a.arg) < 0 || !cnode_possible(node)) {
|
|
r = -EINVAL;
|
|
goto error;
|
|
}
|
|
*(u64 *)p = (u64)cnodeid_to_nasid(node);
|
|
break;
|
|
|
|
case SN_HWPERF_GET_OBJ_NODE:
|
|
i = a.arg;
|
|
if (a.sz != sizeof(u64) || i < 0) {
|
|
r = -EINVAL;
|
|
goto error;
|
|
}
|
|
if ((r = sn_hwperf_enum_objects(&nobj, &objs)) == 0) {
|
|
if (i >= nobj) {
|
|
r = -EINVAL;
|
|
vfree(objs);
|
|
goto error;
|
|
}
|
|
if (objs[i].id != a.arg) {
|
|
for (i = 0; i < nobj; i++) {
|
|
if (objs[i].id == a.arg)
|
|
break;
|
|
}
|
|
}
|
|
if (i == nobj) {
|
|
r = -EINVAL;
|
|
vfree(objs);
|
|
goto error;
|
|
}
|
|
|
|
if (!SN_HWPERF_IS_NODE(objs + i) &&
|
|
!SN_HWPERF_IS_IONODE(objs + i)) {
|
|
r = -ENOENT;
|
|
vfree(objs);
|
|
goto error;
|
|
}
|
|
|
|
*(u64 *)p = (u64)sn_hwperf_obj_to_cnode(objs + i);
|
|
vfree(objs);
|
|
}
|
|
break;
|
|
|
|
case SN_HWPERF_GET_MMRS:
|
|
case SN_HWPERF_SET_MMRS:
|
|
case SN_HWPERF_OBJECT_DISTANCE:
|
|
op_info.p = p;
|
|
op_info.a = &a;
|
|
op_info.v0 = &v0;
|
|
op_info.op = op;
|
|
r = sn_hwperf_op_cpu(&op_info);
|
|
if (r) {
|
|
r = sn_hwperf_map_err(r);
|
|
a.v0 = v0;
|
|
goto error;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
/* all other ops are a direct SAL call */
|
|
r = ia64_sn_hwperf_op(sn_hwperf_master_nasid, op,
|
|
a.arg, a.sz, (u64) p, 0, 0, &v0);
|
|
if (r) {
|
|
r = sn_hwperf_map_err(r);
|
|
goto error;
|
|
}
|
|
a.v0 = v0;
|
|
break;
|
|
}
|
|
|
|
if (op & SN_HWPERF_OP_MEM_COPYOUT) {
|
|
r = copy_to_user((void __user *)a.ptr, p, a.sz);
|
|
if (r != 0) {
|
|
r = -EFAULT;
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
error:
|
|
vfree(p);
|
|
|
|
return r;
|
|
}
|
|
|
|
static const struct file_operations sn_hwperf_fops = {
|
|
.unlocked_ioctl = sn_hwperf_ioctl,
|
|
.llseek = noop_llseek,
|
|
};
|
|
|
|
static struct miscdevice sn_hwperf_dev = {
|
|
MISC_DYNAMIC_MINOR,
|
|
"sn_hwperf",
|
|
&sn_hwperf_fops
|
|
};
|
|
|
|
static int sn_hwperf_init(void)
|
|
{
|
|
u64 v;
|
|
int salr;
|
|
int e = 0;
|
|
|
|
/* single threaded, once-only initialization */
|
|
mutex_lock(&sn_hwperf_init_mutex);
|
|
|
|
if (sn_hwperf_salheap) {
|
|
mutex_unlock(&sn_hwperf_init_mutex);
|
|
return e;
|
|
}
|
|
|
|
/*
|
|
* The PROM code needs a fixed reference node. For convenience the
|
|
* same node as the console I/O is used.
|
|
*/
|
|
sn_hwperf_master_nasid = (nasid_t) ia64_sn_get_console_nasid();
|
|
|
|
/*
|
|
* Request the needed size and install the PROM scratch area.
|
|
* The PROM keeps various tracking bits in this memory area.
|
|
*/
|
|
salr = ia64_sn_hwperf_op(sn_hwperf_master_nasid,
|
|
(u64) SN_HWPERF_GET_HEAPSIZE, 0,
|
|
(u64) sizeof(u64), (u64) &v, 0, 0, NULL);
|
|
if (salr != SN_HWPERF_OP_OK) {
|
|
e = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if ((sn_hwperf_salheap = vmalloc(v)) == NULL) {
|
|
e = -ENOMEM;
|
|
goto out;
|
|
}
|
|
salr = ia64_sn_hwperf_op(sn_hwperf_master_nasid,
|
|
SN_HWPERF_INSTALL_HEAP, 0, v,
|
|
(u64) sn_hwperf_salheap, 0, 0, NULL);
|
|
if (salr != SN_HWPERF_OP_OK) {
|
|
e = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
salr = ia64_sn_hwperf_op(sn_hwperf_master_nasid,
|
|
SN_HWPERF_OBJECT_COUNT, 0,
|
|
sizeof(u64), (u64) &v, 0, 0, NULL);
|
|
if (salr != SN_HWPERF_OP_OK) {
|
|
e = -EINVAL;
|
|
goto out;
|
|
}
|
|
sn_hwperf_obj_cnt = (int)v;
|
|
|
|
out:
|
|
if (e < 0 && sn_hwperf_salheap) {
|
|
vfree(sn_hwperf_salheap);
|
|
sn_hwperf_salheap = NULL;
|
|
sn_hwperf_obj_cnt = 0;
|
|
}
|
|
mutex_unlock(&sn_hwperf_init_mutex);
|
|
return e;
|
|
}
|
|
|
|
int sn_topology_open(struct inode *inode, struct file *file)
|
|
{
|
|
int e;
|
|
struct seq_file *seq;
|
|
struct sn_hwperf_object_info *objbuf;
|
|
int nobj;
|
|
|
|
if ((e = sn_hwperf_enum_objects(&nobj, &objbuf)) == 0) {
|
|
e = seq_open(file, &sn_topology_seq_ops);
|
|
seq = file->private_data;
|
|
seq->private = objbuf;
|
|
}
|
|
|
|
return e;
|
|
}
|
|
|
|
int sn_topology_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct seq_file *seq = file->private_data;
|
|
|
|
vfree(seq->private);
|
|
return seq_release(inode, file);
|
|
}
|
|
|
|
int sn_hwperf_get_nearest_node(cnodeid_t node,
|
|
cnodeid_t *near_mem_node, cnodeid_t *near_cpu_node)
|
|
{
|
|
int e;
|
|
int nobj;
|
|
struct sn_hwperf_object_info *objbuf;
|
|
|
|
if ((e = sn_hwperf_enum_objects(&nobj, &objbuf)) == 0) {
|
|
e = sn_hwperf_get_nearest_node_objdata(objbuf, nobj,
|
|
node, near_mem_node, near_cpu_node);
|
|
vfree(objbuf);
|
|
}
|
|
|
|
return e;
|
|
}
|
|
|
|
static int sn_hwperf_misc_register_init(void)
|
|
{
|
|
int e;
|
|
|
|
if (!ia64_platform_is("sn2"))
|
|
return 0;
|
|
|
|
sn_hwperf_init();
|
|
|
|
/*
|
|
* Register a dynamic misc device for hwperf ioctls. Platforms
|
|
* supporting hotplug will create /dev/sn_hwperf, else user
|
|
* can to look up the minor number in /proc/misc.
|
|
*/
|
|
if ((e = misc_register(&sn_hwperf_dev)) != 0) {
|
|
printk(KERN_ERR "sn_hwperf_misc_register_init: failed to "
|
|
"register misc device for \"%s\"\n", sn_hwperf_dev.name);
|
|
}
|
|
|
|
return e;
|
|
}
|
|
|
|
device_initcall(sn_hwperf_misc_register_init); /* after misc_init() */
|
|
EXPORT_SYMBOL(sn_hwperf_get_nearest_node);
|