David S. Miller | eff3414 | 2007-06-02 14:41:44 -0700 | [diff] [blame] | 1 | /* sysfs.c: Toplogy sysfs support code for sparc64. |
| 2 | * |
| 3 | * Copyright (C) 2007 David S. Miller <davem@davemloft.net> |
| 4 | */ |
Alexey Dobriyan | 8abf919 | 2009-08-13 10:05:43 +0000 | [diff] [blame] | 5 | #include <linux/sched.h> |
David S. Miller | eff3414 | 2007-06-02 14:41:44 -0700 | [diff] [blame] | 6 | #include <linux/sysdev.h> |
| 7 | #include <linux/cpu.h> |
| 8 | #include <linux/smp.h> |
| 9 | #include <linux/percpu.h> |
| 10 | #include <linux/init.h> |
| 11 | |
Sam Ravnborg | 6e6ab2e | 2008-12-26 15:33:07 -0800 | [diff] [blame] | 12 | #include <asm/cpudata.h> |
David Miller | d887ab3 | 2007-06-03 23:38:09 -0700 | [diff] [blame] | 13 | #include <asm/hypervisor.h> |
| 14 | #include <asm/spitfire.h> |
David S. Miller | eff3414 | 2007-06-02 14:41:44 -0700 | [diff] [blame] | 15 | |
David Miller | d887ab3 | 2007-06-03 23:38:09 -0700 | [diff] [blame] | 16 | static DEFINE_PER_CPU(struct hv_mmu_statistics, mmu_stats) __attribute__((aligned(64))); |
| 17 | |
| 18 | #define SHOW_MMUSTAT_ULONG(NAME) \ |
Andi Kleen | 4a0b2b4 | 2008-07-01 18:48:41 +0200 | [diff] [blame] | 19 | static ssize_t show_##NAME(struct sys_device *dev, \ |
| 20 | struct sysdev_attribute *attr, char *buf) \ |
David S. Miller | d1f253e | 2007-06-02 20:46:36 -0700 | [diff] [blame] | 21 | { \ |
David Miller | d887ab3 | 2007-06-03 23:38:09 -0700 | [diff] [blame] | 22 | struct hv_mmu_statistics *p = &per_cpu(mmu_stats, dev->id); \ |
| 23 | return sprintf(buf, "%lu\n", p->NAME); \ |
| 24 | } \ |
| 25 | static SYSDEV_ATTR(NAME, 0444, show_##NAME, NULL) |
| 26 | |
| 27 | SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_8k_tte); |
| 28 | SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_8k_tte); |
| 29 | SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_64k_tte); |
| 30 | SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_64k_tte); |
| 31 | SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_4mb_tte); |
| 32 | SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_4mb_tte); |
| 33 | SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_256mb_tte); |
| 34 | SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_256mb_tte); |
| 35 | SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_8k_tte); |
| 36 | SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_8k_tte); |
| 37 | SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_64k_tte); |
| 38 | SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_64k_tte); |
| 39 | SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_4mb_tte); |
| 40 | SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_4mb_tte); |
| 41 | SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_256mb_tte); |
| 42 | SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_256mb_tte); |
| 43 | SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_8k_tte); |
| 44 | SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_8k_tte); |
| 45 | SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_64k_tte); |
| 46 | SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_64k_tte); |
| 47 | SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_4mb_tte); |
| 48 | SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_4mb_tte); |
| 49 | SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_256mb_tte); |
| 50 | SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_256mb_tte); |
| 51 | SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_8k_tte); |
| 52 | SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_8k_tte); |
| 53 | SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_64k_tte); |
| 54 | SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_64k_tte); |
| 55 | SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_4mb_tte); |
| 56 | SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_4mb_tte); |
| 57 | SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_256mb_tte); |
| 58 | SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_256mb_tte); |
| 59 | |
| 60 | static struct attribute *mmu_stat_attrs[] = { |
| 61 | &attr_immu_tsb_hits_ctx0_8k_tte.attr, |
| 62 | &attr_immu_tsb_ticks_ctx0_8k_tte.attr, |
| 63 | &attr_immu_tsb_hits_ctx0_64k_tte.attr, |
| 64 | &attr_immu_tsb_ticks_ctx0_64k_tte.attr, |
| 65 | &attr_immu_tsb_hits_ctx0_4mb_tte.attr, |
| 66 | &attr_immu_tsb_ticks_ctx0_4mb_tte.attr, |
| 67 | &attr_immu_tsb_hits_ctx0_256mb_tte.attr, |
| 68 | &attr_immu_tsb_ticks_ctx0_256mb_tte.attr, |
| 69 | &attr_immu_tsb_hits_ctxnon0_8k_tte.attr, |
| 70 | &attr_immu_tsb_ticks_ctxnon0_8k_tte.attr, |
| 71 | &attr_immu_tsb_hits_ctxnon0_64k_tte.attr, |
| 72 | &attr_immu_tsb_ticks_ctxnon0_64k_tte.attr, |
| 73 | &attr_immu_tsb_hits_ctxnon0_4mb_tte.attr, |
| 74 | &attr_immu_tsb_ticks_ctxnon0_4mb_tte.attr, |
| 75 | &attr_immu_tsb_hits_ctxnon0_256mb_tte.attr, |
| 76 | &attr_immu_tsb_ticks_ctxnon0_256mb_tte.attr, |
| 77 | &attr_dmmu_tsb_hits_ctx0_8k_tte.attr, |
| 78 | &attr_dmmu_tsb_ticks_ctx0_8k_tte.attr, |
| 79 | &attr_dmmu_tsb_hits_ctx0_64k_tte.attr, |
| 80 | &attr_dmmu_tsb_ticks_ctx0_64k_tte.attr, |
| 81 | &attr_dmmu_tsb_hits_ctx0_4mb_tte.attr, |
| 82 | &attr_dmmu_tsb_ticks_ctx0_4mb_tte.attr, |
| 83 | &attr_dmmu_tsb_hits_ctx0_256mb_tte.attr, |
| 84 | &attr_dmmu_tsb_ticks_ctx0_256mb_tte.attr, |
| 85 | &attr_dmmu_tsb_hits_ctxnon0_8k_tte.attr, |
| 86 | &attr_dmmu_tsb_ticks_ctxnon0_8k_tte.attr, |
| 87 | &attr_dmmu_tsb_hits_ctxnon0_64k_tte.attr, |
| 88 | &attr_dmmu_tsb_ticks_ctxnon0_64k_tte.attr, |
| 89 | &attr_dmmu_tsb_hits_ctxnon0_4mb_tte.attr, |
| 90 | &attr_dmmu_tsb_ticks_ctxnon0_4mb_tte.attr, |
| 91 | &attr_dmmu_tsb_hits_ctxnon0_256mb_tte.attr, |
| 92 | &attr_dmmu_tsb_ticks_ctxnon0_256mb_tte.attr, |
| 93 | NULL, |
| 94 | }; |
| 95 | |
| 96 | static struct attribute_group mmu_stat_group = { |
| 97 | .attrs = mmu_stat_attrs, |
| 98 | .name = "mmu_stats", |
| 99 | }; |
| 100 | |
| 101 | /* XXX convert to rusty's on_one_cpu */ |
| 102 | static unsigned long run_on_cpu(unsigned long cpu, |
| 103 | unsigned long (*func)(unsigned long), |
| 104 | unsigned long arg) |
| 105 | { |
| 106 | cpumask_t old_affinity = current->cpus_allowed; |
| 107 | unsigned long ret; |
| 108 | |
| 109 | /* should return -EINVAL to userspace */ |
| 110 | if (set_cpus_allowed(current, cpumask_of_cpu(cpu))) |
| 111 | return 0; |
| 112 | |
| 113 | ret = func(arg); |
| 114 | |
| 115 | set_cpus_allowed(current, old_affinity); |
| 116 | |
| 117 | return ret; |
| 118 | } |
| 119 | |
| 120 | static unsigned long read_mmustat_enable(unsigned long junk) |
| 121 | { |
| 122 | unsigned long ra = 0; |
| 123 | |
| 124 | sun4v_mmustat_info(&ra); |
| 125 | |
| 126 | return ra != 0; |
| 127 | } |
| 128 | |
| 129 | static unsigned long write_mmustat_enable(unsigned long val) |
| 130 | { |
| 131 | unsigned long ra, orig_ra; |
| 132 | |
| 133 | if (val) |
| 134 | ra = __pa(&per_cpu(mmu_stats, smp_processor_id())); |
| 135 | else |
| 136 | ra = 0UL; |
| 137 | |
| 138 | return sun4v_mmustat_conf(ra, &orig_ra); |
| 139 | } |
| 140 | |
Andi Kleen | 4a0b2b4 | 2008-07-01 18:48:41 +0200 | [diff] [blame] | 141 | static ssize_t show_mmustat_enable(struct sys_device *s, |
| 142 | struct sysdev_attribute *attr, char *buf) |
David Miller | d887ab3 | 2007-06-03 23:38:09 -0700 | [diff] [blame] | 143 | { |
| 144 | unsigned long val = run_on_cpu(s->id, read_mmustat_enable, 0); |
| 145 | return sprintf(buf, "%lx\n", val); |
| 146 | } |
| 147 | |
Andi Kleen | 4a0b2b4 | 2008-07-01 18:48:41 +0200 | [diff] [blame] | 148 | static ssize_t store_mmustat_enable(struct sys_device *s, |
| 149 | struct sysdev_attribute *attr, const char *buf, |
| 150 | size_t count) |
David Miller | d887ab3 | 2007-06-03 23:38:09 -0700 | [diff] [blame] | 151 | { |
| 152 | unsigned long val, err; |
| 153 | int ret = sscanf(buf, "%ld", &val); |
| 154 | |
| 155 | if (ret != 1) |
| 156 | return -EINVAL; |
| 157 | |
| 158 | err = run_on_cpu(s->id, write_mmustat_enable, val); |
| 159 | if (err) |
| 160 | return -EIO; |
| 161 | |
| 162 | return count; |
| 163 | } |
| 164 | |
| 165 | static SYSDEV_ATTR(mmustat_enable, 0644, show_mmustat_enable, store_mmustat_enable); |
| 166 | |
| 167 | static int mmu_stats_supported; |
| 168 | |
| 169 | static int register_mmu_stats(struct sys_device *s) |
| 170 | { |
| 171 | if (!mmu_stats_supported) |
| 172 | return 0; |
| 173 | sysdev_create_file(s, &attr_mmustat_enable); |
| 174 | return sysfs_create_group(&s->kobj, &mmu_stat_group); |
| 175 | } |
| 176 | |
| 177 | #ifdef CONFIG_HOTPLUG_CPU |
| 178 | static void unregister_mmu_stats(struct sys_device *s) |
| 179 | { |
| 180 | if (!mmu_stats_supported) |
| 181 | return; |
| 182 | sysfs_remove_group(&s->kobj, &mmu_stat_group); |
| 183 | sysdev_remove_file(s, &attr_mmustat_enable); |
| 184 | } |
| 185 | #endif |
| 186 | |
| 187 | #define SHOW_CPUDATA_ULONG_NAME(NAME, MEMBER) \ |
Andi Kleen | 4a0b2b4 | 2008-07-01 18:48:41 +0200 | [diff] [blame] | 188 | static ssize_t show_##NAME(struct sys_device *dev, \ |
| 189 | struct sysdev_attribute *attr, char *buf) \ |
David Miller | d887ab3 | 2007-06-03 23:38:09 -0700 | [diff] [blame] | 190 | { \ |
| 191 | cpuinfo_sparc *c = &cpu_data(dev->id); \ |
David S. Miller | d1f253e | 2007-06-02 20:46:36 -0700 | [diff] [blame] | 192 | return sprintf(buf, "%lu\n", c->MEMBER); \ |
| 193 | } |
| 194 | |
David Miller | d887ab3 | 2007-06-03 23:38:09 -0700 | [diff] [blame] | 195 | #define SHOW_CPUDATA_UINT_NAME(NAME, MEMBER) \ |
Andi Kleen | 4a0b2b4 | 2008-07-01 18:48:41 +0200 | [diff] [blame] | 196 | static ssize_t show_##NAME(struct sys_device *dev, \ |
| 197 | struct sysdev_attribute *attr, char *buf) \ |
David S. Miller | d1f253e | 2007-06-02 20:46:36 -0700 | [diff] [blame] | 198 | { \ |
David Miller | d887ab3 | 2007-06-03 23:38:09 -0700 | [diff] [blame] | 199 | cpuinfo_sparc *c = &cpu_data(dev->id); \ |
David S. Miller | d1f253e | 2007-06-02 20:46:36 -0700 | [diff] [blame] | 200 | return sprintf(buf, "%u\n", c->MEMBER); \ |
| 201 | } |
| 202 | |
David Miller | d887ab3 | 2007-06-03 23:38:09 -0700 | [diff] [blame] | 203 | SHOW_CPUDATA_ULONG_NAME(clock_tick, clock_tick); |
David Miller | d887ab3 | 2007-06-03 23:38:09 -0700 | [diff] [blame] | 204 | SHOW_CPUDATA_UINT_NAME(l1_dcache_size, dcache_size); |
| 205 | SHOW_CPUDATA_UINT_NAME(l1_dcache_line_size, dcache_line_size); |
| 206 | SHOW_CPUDATA_UINT_NAME(l1_icache_size, icache_size); |
| 207 | SHOW_CPUDATA_UINT_NAME(l1_icache_line_size, icache_line_size); |
| 208 | SHOW_CPUDATA_UINT_NAME(l2_cache_size, ecache_size); |
| 209 | SHOW_CPUDATA_UINT_NAME(l2_cache_line_size, ecache_line_size); |
David S. Miller | d1f253e | 2007-06-02 20:46:36 -0700 | [diff] [blame] | 210 | |
| 211 | static struct sysdev_attribute cpu_core_attrs[] = { |
| 212 | _SYSDEV_ATTR(clock_tick, 0444, show_clock_tick, NULL), |
David S. Miller | d1f253e | 2007-06-02 20:46:36 -0700 | [diff] [blame] | 213 | _SYSDEV_ATTR(l1_dcache_size, 0444, show_l1_dcache_size, NULL), |
| 214 | _SYSDEV_ATTR(l1_dcache_line_size, 0444, show_l1_dcache_line_size, NULL), |
| 215 | _SYSDEV_ATTR(l1_icache_size, 0444, show_l1_icache_size, NULL), |
| 216 | _SYSDEV_ATTR(l1_icache_line_size, 0444, show_l1_icache_line_size, NULL), |
| 217 | _SYSDEV_ATTR(l2_cache_size, 0444, show_l2_cache_size, NULL), |
| 218 | _SYSDEV_ATTR(l2_cache_line_size, 0444, show_l2_cache_line_size, NULL), |
| 219 | }; |
| 220 | |
David Miller | d887ab3 | 2007-06-03 23:38:09 -0700 | [diff] [blame] | 221 | static DEFINE_PER_CPU(struct cpu, cpu_devices); |
| 222 | |
David S. Miller | d1f253e | 2007-06-02 20:46:36 -0700 | [diff] [blame] | 223 | static void register_cpu_online(unsigned int cpu) |
| 224 | { |
| 225 | struct cpu *c = &per_cpu(cpu_devices, cpu); |
| 226 | struct sys_device *s = &c->sysdev; |
| 227 | int i; |
| 228 | |
| 229 | for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++) |
| 230 | sysdev_create_file(s, &cpu_core_attrs[i]); |
David Miller | d887ab3 | 2007-06-03 23:38:09 -0700 | [diff] [blame] | 231 | |
| 232 | register_mmu_stats(s); |
David S. Miller | d1f253e | 2007-06-02 20:46:36 -0700 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | #ifdef CONFIG_HOTPLUG_CPU |
| 236 | static void unregister_cpu_online(unsigned int cpu) |
| 237 | { |
| 238 | struct cpu *c = &per_cpu(cpu_devices, cpu); |
| 239 | struct sys_device *s = &c->sysdev; |
| 240 | int i; |
| 241 | |
David Miller | d887ab3 | 2007-06-03 23:38:09 -0700 | [diff] [blame] | 242 | unregister_mmu_stats(s); |
David S. Miller | d1f253e | 2007-06-02 20:46:36 -0700 | [diff] [blame] | 243 | for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++) |
| 244 | sysdev_remove_file(s, &cpu_core_attrs[i]); |
| 245 | } |
| 246 | #endif |
| 247 | |
| 248 | static int __cpuinit sysfs_cpu_notify(struct notifier_block *self, |
| 249 | unsigned long action, void *hcpu) |
| 250 | { |
| 251 | unsigned int cpu = (unsigned int)(long)hcpu; |
| 252 | |
| 253 | switch (action) { |
| 254 | case CPU_ONLINE: |
| 255 | case CPU_ONLINE_FROZEN: |
| 256 | register_cpu_online(cpu); |
| 257 | break; |
| 258 | #ifdef CONFIG_HOTPLUG_CPU |
| 259 | case CPU_DEAD: |
| 260 | case CPU_DEAD_FROZEN: |
| 261 | unregister_cpu_online(cpu); |
| 262 | break; |
| 263 | #endif |
| 264 | } |
| 265 | return NOTIFY_OK; |
| 266 | } |
| 267 | |
| 268 | static struct notifier_block __cpuinitdata sysfs_cpu_nb = { |
| 269 | .notifier_call = sysfs_cpu_notify, |
| 270 | }; |
| 271 | |
David Miller | d887ab3 | 2007-06-03 23:38:09 -0700 | [diff] [blame] | 272 | static void __init check_mmu_stats(void) |
| 273 | { |
| 274 | unsigned long dummy1, err; |
| 275 | |
| 276 | if (tlb_type != hypervisor) |
| 277 | return; |
| 278 | |
| 279 | err = sun4v_mmustat_info(&dummy1); |
| 280 | if (!err) |
| 281 | mmu_stats_supported = 1; |
| 282 | } |
| 283 | |
David S. Miller | 919ee67 | 2008-04-23 05:40:25 -0700 | [diff] [blame] | 284 | static void register_nodes(void) |
| 285 | { |
| 286 | #ifdef CONFIG_NUMA |
| 287 | int i; |
| 288 | |
| 289 | for (i = 0; i < MAX_NUMNODES; i++) |
| 290 | register_one_node(i); |
| 291 | #endif |
| 292 | } |
| 293 | |
David S. Miller | eff3414 | 2007-06-02 14:41:44 -0700 | [diff] [blame] | 294 | static int __init topology_init(void) |
| 295 | { |
| 296 | int cpu; |
| 297 | |
David S. Miller | 919ee67 | 2008-04-23 05:40:25 -0700 | [diff] [blame] | 298 | register_nodes(); |
| 299 | |
David Miller | d887ab3 | 2007-06-03 23:38:09 -0700 | [diff] [blame] | 300 | check_mmu_stats(); |
| 301 | |
David S. Miller | d1f253e | 2007-06-02 20:46:36 -0700 | [diff] [blame] | 302 | register_cpu_notifier(&sysfs_cpu_nb); |
| 303 | |
David S. Miller | eff3414 | 2007-06-02 14:41:44 -0700 | [diff] [blame] | 304 | for_each_possible_cpu(cpu) { |
| 305 | struct cpu *c = &per_cpu(cpu_devices, cpu); |
| 306 | |
| 307 | register_cpu(c, cpu); |
David S. Miller | d1f253e | 2007-06-02 20:46:36 -0700 | [diff] [blame] | 308 | if (cpu_online(cpu)) |
| 309 | register_cpu_online(cpu); |
David S. Miller | eff3414 | 2007-06-02 14:41:44 -0700 | [diff] [blame] | 310 | } |
| 311 | |
| 312 | return 0; |
| 313 | } |
| 314 | |
| 315 | subsys_initcall(topology_init); |