diff options
Diffstat (limited to 'arch/ia64/sn/kernel/sn2/sn_hwperf.c')
| -rw-r--r-- | arch/ia64/sn/kernel/sn2/sn_hwperf.c | 1004 |
1 files changed, 0 insertions, 1004 deletions
diff --git a/arch/ia64/sn/kernel/sn2/sn_hwperf.c b/arch/ia64/sn/kernel/sn2/sn_hwperf.c deleted file mode 100644 index 55febd65911a..000000000000 --- a/arch/ia64/sn/kernel/sn2/sn_hwperf.c +++ /dev/null @@ -1,1004 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2004-2006 Silicon Graphics, Inc. All rights reserved. - * - * SGI Altix topology and hardware performance monitoring API. - * Mark Goodwin <markgw@sgi.com>. - * - * Creates /proc/sgi_sn/sn_topology (read-only) to export - * info about Altix nodes, routers, CPUs and NumaLink - * interconnection/topology. - * - * Also creates a dynamic misc device named "sn_hwperf" - * that supports an ioctl interface to call down into SAL - * to discover hw objects, topology and to read/write - * memory mapped registers, e.g. for performance monitoring. - * The "sn_hwperf" device is registered only after the procfs - * file is first opened, i.e. only if/when it's needed. - * - * This API is used by SGI Performance Co-Pilot and other - * tools, see http://oss.sgi.com/projects/pcp - */ - -#include <linux/fs.h> -#include <linux/slab.h> -#include <linux/export.h> -#include <linux/vmalloc.h> -#include <linux/seq_file.h> -#include <linux/miscdevice.h> -#include <linux/utsname.h> -#include <linux/cpumask.h> -#include <linux/nodemask.h> -#include <linux/smp.h> -#include <linux/mutex.h> - -#include <asm/processor.h> -#include <asm/topology.h> -#include <linux/uaccess.h> -#include <asm/sal.h> -#include <asm/sn/io.h> -#include <asm/sn/sn_sal.h> -#include <asm/sn/module.h> -#include <asm/sn/geo.h> -#include <asm/sn/sn2/sn_hwperf.h> -#include <asm/sn/addrs.h> - -static void *sn_hwperf_salheap = NULL; -static int sn_hwperf_obj_cnt = 0; -static nasid_t sn_hwperf_master_nasid = INVALID_NASID; -static int sn_hwperf_init(void); -static DEFINE_MUTEX(sn_hwperf_init_mutex); - -#define cnode_possible(n) ((n) < num_cnodes) - -static int sn_hwperf_enum_objects(int *nobj, struct sn_hwperf_object_info **ret) -{ - int e; - u64 sz; - struct sn_hwperf_object_info *objbuf = NULL; - - if ((e = sn_hwperf_init()) < 0) { - printk(KERN_ERR "sn_hwperf_init failed: err %d\n", e); - goto out; - } - - sz = sn_hwperf_obj_cnt * sizeof(struct sn_hwperf_object_info); - objbuf = vmalloc(sz); - if (objbuf == NULL) { - printk("sn_hwperf_enum_objects: vmalloc(%d) failed\n", (int)sz); - e = -ENOMEM; - goto out; - } - - e = ia64_sn_hwperf_op(sn_hwperf_master_nasid, SN_HWPERF_ENUM_OBJECTS, - 0, sz, (u64) objbuf, 0, 0, NULL); - if (e != SN_HWPERF_OP_OK) { - e = -EINVAL; - vfree(objbuf); - } - -out: - *nobj = sn_hwperf_obj_cnt; - *ret = objbuf; - return e; -} - -static int sn_hwperf_location_to_bpos(char *location, - int *rack, int *bay, int *slot, int *slab) -{ - char type; - - /* first scan for an old style geoid string */ - if (sscanf(location, "%03d%c%02d#%d", - rack, &type, bay, slab) == 4) - *slot = 0; - else /* scan for a new bladed geoid string */ - if (sscanf(location, "%03d%c%02d^%02d#%d", - rack, &type, bay, slot, slab) != 5) - return -1; - /* success */ - return 0; -} - -static int sn_hwperf_geoid_to_cnode(char *location) -{ - int cnode; - geoid_t geoid; - moduleid_t module_id; - int rack, bay, slot, slab; - int this_rack, this_bay, this_slot, this_slab; - - if (sn_hwperf_location_to_bpos(location, &rack, &bay, &slot, &slab)) - return -1; - - /* - * FIXME: replace with cleaner for_each_XXX macro which addresses - * both compute and IO nodes once ACPI3.0 is available. - */ - for (cnode = 0; cnode < num_cnodes; cnode++) { - geoid = cnodeid_get_geoid(cnode); - module_id = geo_module(geoid); - this_rack = MODULE_GET_RACK(module_id); - this_bay = MODULE_GET_BPOS(module_id); - this_slot = geo_slot(geoid); - this_slab = geo_slab(geoid); - if (rack == this_rack && bay == this_bay && - slot == this_slot && slab == this_slab) { - break; - } - } - - return cnode_possible(cnode) ? cnode : -1; -} - -static int sn_hwperf_obj_to_cnode(struct sn_hwperf_object_info * obj) -{ - if (!SN_HWPERF_IS_NODE(obj) && !SN_HWPERF_IS_IONODE(obj)) - BUG(); - if (SN_HWPERF_FOREIGN(obj)) - return -1; - return sn_hwperf_geoid_to_cnode(obj->location); -} - -static int sn_hwperf_generic_ordinal(struct sn_hwperf_object_info *obj, - struct sn_hwperf_object_info *objs) -{ - int ordinal; - struct sn_hwperf_object_info *p; - - for (ordinal=0, p=objs; p != obj; p++) { - if (SN_HWPERF_FOREIGN(p)) - continue; - if (SN_HWPERF_SAME_OBJTYPE(p, obj)) - ordinal++; - } - - return ordinal; -} - -static const char *slabname_node = "node"; /* SHub asic */ -static const char *slabname_ionode = "ionode"; /* TIO asic */ -static const char *slabname_router = "router"; /* NL3R or NL4R */ -static const char *slabname_other = "other"; /* unknown asic */ - -static const char *sn_hwperf_get_slabname(struct sn_hwperf_object_info *obj, - struct sn_hwperf_object_info *objs, int *ordinal) -{ - int isnode; - const char *slabname = slabname_other; - - if ((isnode = SN_HWPERF_IS_NODE(obj)) || SN_HWPERF_IS_IONODE(obj)) { - slabname = isnode ? slabname_node : slabname_ionode; - *ordinal = sn_hwperf_obj_to_cnode(obj); - } - else { - *ordinal = sn_hwperf_generic_ordinal(obj, objs); - if (SN_HWPERF_IS_ROUTER(obj)) - slabname = slabname_router; - } - - return slabname; -} - -static void print_pci_topology(struct seq_file *s) -{ - char *p; - size_t sz; - int e; - - for (sz = PAGE_SIZE; sz < 16 * PAGE_SIZE; sz += PAGE_SIZE) { - if (!(p = kmalloc(sz, GFP_KERNEL))) - break; - e = ia64_sn_ioif_get_pci_topology(__pa(p), sz); - if (e == SALRET_OK) - seq_puts(s, p); - kfree(p); - if (e == SALRET_OK || e == SALRET_NOT_IMPLEMENTED) - break; - } -} - -static inline int sn_hwperf_has_cpus(cnodeid_t node) -{ - return node < MAX_NUMNODES && node_online(node) && nr_cpus_node(node); -} - -static inline int sn_hwperf_has_mem(cnodeid_t node) -{ - return node < MAX_NUMNODES && node_online(node) && NODE_DATA(node)->node_present_pages; -} - -static struct sn_hwperf_object_info * -sn_hwperf_findobj_id(struct sn_hwperf_object_info *objbuf, - int nobj, int id) -{ - int i; - struct sn_hwperf_object_info *p = objbuf; - - for (i=0; i < nobj; i++, p++) { - if (p->id == id) - return p; - } - - return NULL; - -} - -static int sn_hwperf_get_nearest_node_objdata(struct sn_hwperf_object_info *objbuf, - int nobj, cnodeid_t node, cnodeid_t *near_mem_node, cnodeid_t *near_cpu_node) -{ - int e; - struct sn_hwperf_object_info *nodeobj = NULL; - struct sn_hwperf_object_info *op; - struct sn_hwperf_object_info *dest; - struct sn_hwperf_object_info *router; - struct sn_hwperf_port_info ptdata[16]; - int sz, i, j; - cnodeid_t c; - int found_mem = 0; - int found_cpu = 0; - - if (!cnode_possible(node)) - return -EINVAL; - - if (sn_hwperf_has_cpus(node)) { - if (near_cpu_node) - *near_cpu_node = node; - found_cpu++; - } - - if (sn_hwperf_has_mem(node)) { - if (near_mem_node) - *near_mem_node = node; - found_mem++; - } - - if (found_cpu && found_mem) - return 0; /* trivially successful */ - - /* find the argument node object */ - for (i=0, op=objbuf; i < nobj; i++, op++) { - if (!SN_HWPERF_IS_NODE(op) && !SN_HWPERF_IS_IONODE(op)) - continue; - if (node == sn_hwperf_obj_to_cnode(op)) { - nodeobj = op; - break; - } - } - if (!nodeobj) { - e = -ENOENT; - goto err; - } - - /* get it's interconnect topology */ - sz = op->ports * sizeof(struct sn_hwperf_port_info); - BUG_ON(sz > sizeof(ptdata)); - e = ia64_sn_hwperf_op(sn_hwperf_master_nasid, - SN_HWPERF_ENUM_PORTS, nodeobj->id, sz, - (u64)&ptdata, 0, 0, NULL); - if (e != SN_HWPERF_OP_OK) { - e = -EINVAL; - goto err; - } - - /* find nearest node with cpus and nearest memory */ - for (router=NULL, j=0; j < op->ports; j++) { - dest = sn_hwperf_findobj_id(objbuf, nobj, ptdata[j].conn_id); - if (dest && SN_HWPERF_IS_ROUTER(dest)) - router = dest; - if (!dest || SN_HWPERF_FOREIGN(dest) || - !SN_HWPERF_IS_NODE(dest) || SN_HWPERF_IS_IONODE(dest)) { - continue; - } - c = sn_hwperf_obj_to_cnode(dest); - if (!found_cpu && sn_hwperf_has_cpus(c)) { - if (near_cpu_node) - *near_cpu_node = c; - found_cpu++; - } - if (!found_mem && sn_hwperf_has_mem(c)) { - if (near_mem_node) - *near_mem_node = c; - found_mem++; - } - } - - if (router && (!found_cpu || !found_mem)) { - /* search for a node connected to the same router */ - sz = router->ports * sizeof(struct sn_hwperf_port_info); - BUG_ON(sz > sizeof(ptdata)); - e = ia64_sn_hwperf_op(sn_hwperf_master_nasid, - SN_HWPERF_ENUM_PORTS, router->id, sz, - (u64)&ptdata, 0, 0, NULL); - if (e != SN_HWPERF_OP_OK) { - e = -EINVAL; - goto err; - } - for (j=0; j < router->ports; j++) { - dest = sn_hwperf_findobj_id(objbuf, nobj, - ptdata[j].conn_id); - if (!dest || dest->id == node || - SN_HWPERF_FOREIGN(dest) || - !SN_HWPERF_IS_NODE(dest) || - SN_HWPERF_IS_IONODE(dest)) { - continue; - } - c = sn_hwperf_obj_to_cnode(dest); - if (!found_cpu && sn_hwperf_has_cpus(c)) { - if (near_cpu_node) - *near_cpu_node = c; - found_cpu++; - } - if (!found_mem && sn_hwperf_has_mem(c)) { - if (near_mem_node) - *near_mem_node = c; - found_mem++; - } - if (found_cpu && found_mem) - break; - } - } - - if (!found_cpu || !found_mem) { - /* resort to _any_ node with CPUs and memory */ - for (i=0, op=objbuf; i < nobj; i++, op++) { - if (SN_HWPERF_FOREIGN(op) || - SN_HWPERF_IS_IONODE(op) || - !SN_HWPERF_IS_NODE(op)) { - continue; - } - c = sn_hwperf_obj_to_cnode(op); - if (!found_cpu && sn_hwperf_has_cpus(c)) { - if (near_cpu_node) - *near_cpu_node = c; - found_cpu++; - } - if (!found_mem && sn_hwperf_has_mem(c)) { - if (near_mem_node) - *near_mem_node = c; - found_mem++; - } - if (found_cpu && found_mem) - break; - } - } - - if (!found_cpu || !found_mem) - e = -ENODATA; - -err: - return e; -} - - -static int sn_topology_show(struct seq_file *s, void *d) -{ - int sz; - int pt; - int e = 0; - int i; - int j; - const char *slabname; - int ordinal; - char slice; - struct cpuinfo_ia64 *c; - struct sn_hwperf_port_info *ptdata; - struct sn_hwperf_object_info *p; - struct sn_hwperf_object_info *obj = d; /* this object */ - struct sn_hwperf_object_info *objs = s->private; /* all objects */ - u8 shubtype; - u8 system_size; - u8 sharing_size; - u8 partid; - u8 coher; - u8 nasid_shift; - u8 region_size; - u16 nasid_mask; - int nasid_msb; - - if (obj == objs) { - seq_printf(s, "# sn_topology version 2\n"); - seq_printf(s, "# objtype ordinal location partition" - " [attribute value [, ...]]\n"); - - if (ia64_sn_get_sn_info(0, - &shubtype, &nasid_mask, &nasid_shift, &system_size, - &sharing_size, &partid, &coher, ®ion_size)) - BUG(); - for (nasid_msb=63; nasid_msb > 0; nasid_msb--) { - if (((u64)nasid_mask << nasid_shift) & (1ULL << nasid_msb)) - break; - } - seq_printf(s, "partition %u %s local " - "shubtype %s, " - "nasid_mask 0x%016llx, " - "nasid_bits %d:%d, " - "system_size %d, " - "sharing_size %d, " - "coherency_domain %d, " - "region_size %d\n", - - partid, utsname()->nodename, - shubtype ? "shub2" : "shub1", - (u64)nasid_mask << nasid_shift, nasid_msb, nasid_shift, - system_size, sharing_size, coher, region_size); - - print_pci_topology(s); - } - - if (SN_HWPERF_FOREIGN(obj)) { - /* private in another partition: not interesting */ - return 0; - } - - for (i = 0; i < SN_HWPERF_MAXSTRING && obj->name[i]; i++) { - if (obj->name[i] == ' ') - obj->name[i] = '_'; - } - - slabname = sn_hwperf_get_slabname(obj, objs, &ordinal); - seq_printf(s, "%s %d %s %s asic %s", slabname, ordinal, obj->location, - obj->sn_hwp_this_part ? "local" : "shared", obj->name); - - if (ordinal < 0 || (!SN_HWPERF_IS_NODE(obj) && !SN_HWPERF_IS_IONODE(obj))) - seq_putc(s, '\n'); - else { - cnodeid_t near_mem = -1; - cnodeid_t near_cpu = -1; - - seq_printf(s, ", nasid 0x%x", cnodeid_to_nasid(ordinal)); - - if (sn_hwperf_get_nearest_node_objdata(objs, sn_hwperf_obj_cnt, - ordinal, &near_mem, &near_cpu) == 0) { - seq_printf(s, ", near_mem_nodeid %d, near_cpu_nodeid %d", - near_mem, near_cpu); - } - - if (!SN_HWPERF_IS_IONODE(obj)) { - for_each_online_node(i) { - seq_printf(s, i ? ":%d" : ", dist %d", - node_distance(ordinal, i)); - } - } - - seq_putc(s, '\n'); - - /* - * CPUs on this node, if any - */ - if (!SN_HWPERF_IS_IONODE(obj)) { - for_each_cpu_and(i, cpu_online_mask, - cpumask_of_node(ordinal)) { - slice = 'a' + cpuid_to_slice(i); - c = cpu_data(i); - seq_printf(s, "cpu %d %s%c local" - " freq %luMHz, arch ia64", - i, obj->location, slice, - c->proc_freq / 1000000); - for_each_online_cpu(j) { - seq_printf(s, j ? ":%d" : ", dist %d", - node_distance( - 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); |