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https://github.com/FEX-Emu/linux.git
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[IA64] - SGI SN hwperf enhancements -
Add a new exported function for determining the nearest node with CPUs for I/O nodes and fix a bug where the hwperf dynamic misc device was being registered before misc_init(). Signed-off-by: Mark Goodwin <markgw@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Mark Goodwin
Tony Luck
parent
ecc3c30ae3
commit
60a3ba0bb4
@ -59,7 +59,7 @@ static int sn_hwperf_enum_objects(int *nobj, struct sn_hwperf_object_info **ret)
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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("sn_hwperf_init failed: err %d\n", e);
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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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@ -111,7 +111,7 @@ static int sn_hwperf_geoid_to_cnode(char *location)
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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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for (cnode = 0; cnode < numionodes; cnode++) {
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for_each_node(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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@ -124,11 +124,13 @@ static int sn_hwperf_geoid_to_cnode(char *location)
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}
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}
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return cnode < numionodes ? cnode : -1;
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return node_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 (!obj->sn_hwp_this_part)
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return -1;
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return sn_hwperf_geoid_to_cnode(obj->location);
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@ -192,6 +194,181 @@ static void print_pci_topology(struct seq_file *s)
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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_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_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 (!node_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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if (sz > sizeof(ptdata))
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BUG();
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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_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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if (SN_HWPERF_IS_ROUTER(dest))
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router = dest;
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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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if (sz > sizeof(ptdata))
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BUG();
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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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@ -265,11 +442,24 @@ static int sn_topology_show(struct seq_file *s, void *d)
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if (!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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for (i=0; i < numionodes; i++) {
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seq_printf(s, i ? ":%d" : ", dist %d",
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node_distance(ordinal, i));
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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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@ -554,6 +744,8 @@ sn_hwperf_ioctl(struct inode *in, struct file *fp, u32 op, u64 arg)
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if ((r = sn_hwperf_enum_objects(&nobj, &objs)) == 0) {
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memset(p, 0, a.sz);
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for (i = 0; i < nobj; i++) {
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if (!SN_HWPERF_IS_NODE(objs + i))
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continue;
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node = sn_hwperf_obj_to_cnode(objs + i);
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for_each_online_cpu(j) {
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if (node != cpu_to_node(j))
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@ -580,7 +772,7 @@ sn_hwperf_ioctl(struct inode *in, struct file *fp, u32 op, u64 arg)
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case SN_HWPERF_GET_NODE_NASID:
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if (a.sz != sizeof(u64) ||
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(node = a.arg) < 0 || node >= numionodes) {
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(node = a.arg) < 0 || !node_possible(node)) {
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r = -EINVAL;
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goto error;
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}
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@ -609,6 +801,14 @@ sn_hwperf_ioctl(struct inode *in, struct file *fp, u32 op, u64 arg)
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vfree(objs);
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goto error;
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}
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if (!SN_HWPERF_IS_NODE(objs + i) &&
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!SN_HWPERF_IS_IONODE(objs + i)) {
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r = -ENOENT;
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vfree(objs);
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goto error;
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}
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*(u64 *)p = (u64)sn_hwperf_obj_to_cnode(objs + i);
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vfree(objs);
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}
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@ -674,6 +874,7 @@ static int sn_hwperf_init(void)
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/* single threaded, once-only initialization */
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down(&sn_hwperf_init_mutex);
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if (sn_hwperf_salheap) {
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up(&sn_hwperf_init_mutex);
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return e;
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@ -724,19 +925,6 @@ out:
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sn_hwperf_salheap = NULL;
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sn_hwperf_obj_cnt = 0;
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}
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if (!e) {
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/*
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* Register a dynamic misc device for ioctl. Platforms
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* supporting hotplug will create /dev/sn_hwperf, else
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* user can to look up the minor number in /proc/misc.
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*/
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if ((e = misc_register(&sn_hwperf_dev)) != 0) {
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printk(KERN_ERR "sn_hwperf_init: misc register "
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"for \"sn_hwperf\" failed, err %d\n", e);
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}
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}
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up(&sn_hwperf_init_mutex);
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return e;
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}
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@ -764,3 +952,41 @@ int sn_topology_release(struct inode *inode, struct file *file)
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vfree(seq->private);
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return seq_release(inode, file);
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}
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int sn_hwperf_get_nearest_node(cnodeid_t node,
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cnodeid_t *near_mem_node, cnodeid_t *near_cpu_node)
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{
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int e;
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int nobj;
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struct sn_hwperf_object_info *objbuf;
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if ((e = sn_hwperf_enum_objects(&nobj, &objbuf)) == 0) {
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e = sn_hwperf_get_nearest_node_objdata(objbuf, nobj,
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node, near_mem_node, near_cpu_node);
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vfree(objbuf);
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}
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return e;
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}
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static int __devinit sn_hwperf_misc_register_init(void)
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{
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int e;
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sn_hwperf_init();
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/*
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* Register a dynamic misc device for hwperf ioctls. Platforms
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* supporting hotplug will create /dev/sn_hwperf, else user
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* can to look up the minor number in /proc/misc.
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*/
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if ((e = misc_register(&sn_hwperf_dev)) != 0) {
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printk(KERN_ERR "sn_hwperf_misc_register_init: failed to "
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"register misc device for \"%s\"\n", sn_hwperf_dev.name);
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}
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return e;
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}
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device_initcall(sn_hwperf_misc_register_init); /* after misc_init() */
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EXPORT_SYMBOL(sn_hwperf_get_nearest_node);
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@ -43,6 +43,7 @@ struct sn_hwperf_object_info {
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/* macros for object classification */
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#define SN_HWPERF_IS_NODE(x) ((x) && strstr((x)->name, "SHub"))
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#define SN_HWPERF_IS_NODE_SHUB2(x) ((x) && strstr((x)->name, "SHub 2."))
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#define SN_HWPERF_IS_IONODE(x) ((x) && strstr((x)->name, "TIO"))
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#define SN_HWPERF_IS_ROUTER(x) ((x) && strstr((x)->name, "Router"))
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#define SN_HWPERF_IS_NL3ROUTER(x) ((x) && strstr((x)->name, "NL3Router"))
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@ -214,6 +215,15 @@ struct sn_hwperf_ioctl_args {
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*/
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#define SN_HWPERF_GET_NODE_NASID (102|SN_HWPERF_OP_MEM_COPYOUT)
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/*
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* Given a node id, determine the id of the nearest node with CPUs
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* and the id of the nearest node that has memory. The argument
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* node would normally be a "headless" node, e.g. an "IO node".
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* Return 0 on success.
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*/
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extern int sn_hwperf_get_nearest_node(cnodeid_t node,
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cnodeid_t *near_mem, cnodeid_t *near_cpu);
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/* return codes */
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#define SN_HWPERF_OP_OK 0
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#define SN_HWPERF_OP_NOMEM 1
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