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26#include <linux/module.h>
27#include <linux/kernel.h>
28#include <linux/errno.h>
29#include <linux/slab.h>
30#include <linux/mm.h>
31#include <linux/io.h>
32#include <linux/smp_lock.h>
33#include <linux/spinlock.h>
34#include <linux/device.h>
35#include <linux/miscdevice.h>
36#include <linux/interrupt.h>
37#include <linux/proc_fs.h>
38#include <linux/uaccess.h>
39#include "gru.h"
40#include "grulib.h"
41#include "grutables.h"
42
43#if defined CONFIG_X86_64
44#include <asm/genapic.h>
45#include <asm/irq.h>
46#define IS_UV() is_uv_system()
47#elif defined CONFIG_IA64
48#include <asm/system.h>
49#include <asm/sn/simulator.h>
50
51#define IS_UV() IS_MEDUSA() || ia64_platform_is("uv")
52#else
53#define IS_UV() 0
54#endif
55
56#include <asm/uv/uv_hub.h>
57#include <asm/uv/uv_mmrs.h>
58
59struct gru_blade_state *gru_base[GRU_MAX_BLADES] __read_mostly;
60unsigned long gru_start_paddr, gru_end_paddr __read_mostly;
61struct gru_stats_s gru_stats;
62
63
64static int max_user_cbrs, max_user_dsr_bytes;
65
66static struct file_operations gru_fops;
67static struct miscdevice gru_miscdev;
68
69
70
71
72
73
74
75
76static void gru_vma_close(struct vm_area_struct *vma)
77{
78 struct gru_vma_data *vdata;
79 struct gru_thread_state *gts;
80 struct list_head *entry, *next;
81
82 if (!vma->vm_private_data)
83 return;
84
85 vdata = vma->vm_private_data;
86 vma->vm_private_data = NULL;
87 gru_dbg(grudev, "vma %p, file %p, vdata %p\n", vma, vma->vm_file,
88 vdata);
89 list_for_each_safe(entry, next, &vdata->vd_head) {
90 gts =
91 list_entry(entry, struct gru_thread_state, ts_next);
92 list_del(>s->ts_next);
93 mutex_lock(>s->ts_ctxlock);
94 if (gts->ts_gru)
95 gru_unload_context(gts, 0);
96 mutex_unlock(>s->ts_ctxlock);
97 gts_drop(gts);
98 }
99 kfree(vdata);
100 STAT(vdata_free);
101}
102
103
104
105
106
107
108
109
110static int gru_file_mmap(struct file *file, struct vm_area_struct *vma)
111{
112 if ((vma->vm_flags & (VM_SHARED | VM_WRITE)) != (VM_SHARED | VM_WRITE))
113 return -EPERM;
114
115 if (vma->vm_start & (GRU_GSEG_PAGESIZE - 1) ||
116 vma->vm_end & (GRU_GSEG_PAGESIZE - 1))
117 return -EINVAL;
118
119 vma->vm_flags |=
120 (VM_IO | VM_DONTCOPY | VM_LOCKED | VM_DONTEXPAND | VM_PFNMAP |
121 VM_RESERVED);
122 vma->vm_page_prot = PAGE_SHARED;
123 vma->vm_ops = &gru_vm_ops;
124
125 vma->vm_private_data = gru_alloc_vma_data(vma, 0);
126 if (!vma->vm_private_data)
127 return -ENOMEM;
128
129 gru_dbg(grudev, "file %p, vaddr 0x%lx, vma %p, vdata %p\n",
130 file, vma->vm_start, vma, vma->vm_private_data);
131 return 0;
132}
133
134
135
136
137static int gru_create_new_context(unsigned long arg)
138{
139 struct gru_create_context_req req;
140 struct vm_area_struct *vma;
141 struct gru_vma_data *vdata;
142 int ret = -EINVAL;
143
144
145 if (copy_from_user(&req, (void __user *)arg, sizeof(req)))
146 return -EFAULT;
147
148 if (req.data_segment_bytes == 0 ||
149 req.data_segment_bytes > max_user_dsr_bytes)
150 return -EINVAL;
151 if (!req.control_blocks || !req.maximum_thread_count ||
152 req.control_blocks > max_user_cbrs)
153 return -EINVAL;
154
155 if (!(req.options & GRU_OPT_MISS_MASK))
156 req.options |= GRU_OPT_MISS_FMM_INTR;
157
158 down_write(¤t->mm->mmap_sem);
159 vma = gru_find_vma(req.gseg);
160 if (vma) {
161 vdata = vma->vm_private_data;
162 vdata->vd_user_options = req.options;
163 vdata->vd_dsr_au_count =
164 GRU_DS_BYTES_TO_AU(req.data_segment_bytes);
165 vdata->vd_cbr_au_count = GRU_CB_COUNT_TO_AU(req.control_blocks);
166 ret = 0;
167 }
168 up_write(¤t->mm->mmap_sem);
169
170 return ret;
171}
172
173
174
175
176static long gru_get_config_info(unsigned long arg)
177{
178 struct gru_config_info info;
179 int nodesperblade;
180
181 if (num_online_nodes() > 1 &&
182 (uv_node_to_blade_id(1) == uv_node_to_blade_id(0)))
183 nodesperblade = 2;
184 else
185 nodesperblade = 1;
186 info.cpus = num_online_cpus();
187 info.nodes = num_online_nodes();
188 info.blades = info.nodes / nodesperblade;
189 info.chiplets = GRU_CHIPLETS_PER_BLADE * info.blades;
190
191 if (copy_to_user((void __user *)arg, &info, sizeof(info)))
192 return -EFAULT;
193 return 0;
194}
195
196
197
198
199static long gru_get_chiplet_status(unsigned long arg)
200{
201 struct gru_state *gru;
202 struct gru_chiplet_info info;
203
204 if (copy_from_user(&info, (void __user *)arg, sizeof(info)))
205 return -EFAULT;
206
207 if (info.node == -1)
208 info.node = numa_node_id();
209 if (info.node >= num_possible_nodes() ||
210 info.chiplet >= GRU_CHIPLETS_PER_HUB ||
211 info.node < 0 || info.chiplet < 0)
212 return -EINVAL;
213
214 info.blade = uv_node_to_blade_id(info.node);
215 gru = get_gru(info.blade, info.chiplet);
216
217 info.total_dsr_bytes = GRU_NUM_DSR_BYTES;
218 info.total_cbr = GRU_NUM_CB;
219 info.total_user_dsr_bytes = GRU_NUM_DSR_BYTES -
220 gru->gs_reserved_dsr_bytes;
221 info.total_user_cbr = GRU_NUM_CB - gru->gs_reserved_cbrs;
222 info.free_user_dsr_bytes = hweight64(gru->gs_dsr_map) *
223 GRU_DSR_AU_BYTES;
224 info.free_user_cbr = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE;
225
226 if (copy_to_user((void __user *)arg, &info, sizeof(info)))
227 return -EFAULT;
228 return 0;
229}
230
231
232
233
234
235
236static long gru_file_unlocked_ioctl(struct file *file, unsigned int req,
237 unsigned long arg)
238{
239 int err = -EBADRQC;
240
241 gru_dbg(grudev, "file %p\n", file);
242
243 switch (req) {
244 case GRU_CREATE_CONTEXT:
245 err = gru_create_new_context(arg);
246 break;
247 case GRU_SET_TASK_SLICE:
248 err = gru_set_task_slice(arg);
249 break;
250 case GRU_USER_GET_EXCEPTION_DETAIL:
251 err = gru_get_exception_detail(arg);
252 break;
253 case GRU_USER_UNLOAD_CONTEXT:
254 err = gru_user_unload_context(arg);
255 break;
256 case GRU_GET_CHIPLET_STATUS:
257 err = gru_get_chiplet_status(arg);
258 break;
259 case GRU_USER_FLUSH_TLB:
260 err = gru_user_flush_tlb(arg);
261 break;
262 case GRU_USER_CALL_OS:
263 err = gru_handle_user_call_os(arg);
264 break;
265 case GRU_GET_CONFIG_INFO:
266 err = gru_get_config_info(arg);
267 break;
268 }
269 return err;
270}
271
272
273
274
275
276static void gru_init_chiplet(struct gru_state *gru, unsigned long paddr,
277 void *vaddr, int nid, int bid, int grunum)
278{
279 spin_lock_init(&gru->gs_lock);
280 spin_lock_init(&gru->gs_asid_lock);
281 gru->gs_gru_base_paddr = paddr;
282 gru->gs_gru_base_vaddr = vaddr;
283 gru->gs_gid = bid * GRU_CHIPLETS_PER_BLADE + grunum;
284 gru->gs_blade = gru_base[bid];
285 gru->gs_blade_id = bid;
286 gru->gs_cbr_map = (GRU_CBR_AU == 64) ? ~0 : (1UL << GRU_CBR_AU) - 1;
287 gru->gs_dsr_map = (1UL << GRU_DSR_AU) - 1;
288 gru_tgh_flush_init(gru);
289 gru_dbg(grudev, "bid %d, nid %d, gru %x, vaddr %p (0x%lx)\n",
290 bid, nid, gru->gs_gid, gru->gs_gru_base_vaddr,
291 gru->gs_gru_base_paddr);
292 gru_kservices_init(gru);
293}
294
295static int gru_init_tables(unsigned long gru_base_paddr, void *gru_base_vaddr)
296{
297 int pnode, nid, bid, chip;
298 int cbrs, dsrbytes, n;
299 int order = get_order(sizeof(struct gru_blade_state));
300 struct page *page;
301 struct gru_state *gru;
302 unsigned long paddr;
303 void *vaddr;
304
305 max_user_cbrs = GRU_NUM_CB;
306 max_user_dsr_bytes = GRU_NUM_DSR_BYTES;
307 for_each_online_node(nid) {
308 bid = uv_node_to_blade_id(nid);
309 pnode = uv_node_to_pnode(nid);
310 if (gru_base[bid])
311 continue;
312 page = alloc_pages_node(nid, GFP_KERNEL, order);
313 if (!page)
314 goto fail;
315 gru_base[bid] = page_address(page);
316 memset(gru_base[bid], 0, sizeof(struct gru_blade_state));
317 gru_base[bid]->bs_lru_gru = &gru_base[bid]->bs_grus[0];
318 spin_lock_init(&gru_base[bid]->bs_lock);
319
320 dsrbytes = 0;
321 cbrs = 0;
322 for (gru = gru_base[bid]->bs_grus, chip = 0;
323 chip < GRU_CHIPLETS_PER_BLADE;
324 chip++, gru++) {
325 paddr = gru_chiplet_paddr(gru_base_paddr, pnode, chip);
326 vaddr = gru_chiplet_vaddr(gru_base_vaddr, pnode, chip);
327 gru_init_chiplet(gru, paddr, vaddr, bid, nid, chip);
328 n = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE;
329 cbrs = max(cbrs, n);
330 n = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES;
331 dsrbytes = max(dsrbytes, n);
332 }
333 max_user_cbrs = min(max_user_cbrs, cbrs);
334 max_user_dsr_bytes = min(max_user_dsr_bytes, dsrbytes);
335 }
336
337 return 0;
338
339fail:
340 for (nid--; nid >= 0; nid--)
341 free_pages((unsigned long)gru_base[nid], order);
342 return -ENOMEM;
343}
344
345#ifdef CONFIG_IA64
346
347static int get_base_irq(void)
348{
349 return IRQ_GRU;
350}
351
352#elif defined CONFIG_X86_64
353
354static void noop(unsigned int irq)
355{
356}
357
358static struct irq_chip gru_chip = {
359 .name = "gru",
360 .mask = noop,
361 .unmask = noop,
362 .ack = noop,
363};
364
365static int get_base_irq(void)
366{
367 set_irq_chip(IRQ_GRU, &gru_chip);
368 set_irq_chip(IRQ_GRU + 1, &gru_chip);
369 return IRQ_GRU;
370}
371#endif
372
373
374
375
376
377
378static int __init gru_init(void)
379{
380 int ret, irq, chip;
381 char id[10];
382 void *gru_start_vaddr;
383
384 if (!IS_UV())
385 return 0;
386
387#if defined CONFIG_IA64
388 gru_start_paddr = 0xd000000000UL;
389#else
390 gru_start_paddr = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR) &
391 0x7fffffffffffUL;
392
393#endif
394 gru_start_vaddr = __va(gru_start_paddr);
395 gru_end_paddr = gru_start_paddr + MAX_NUMNODES * GRU_SIZE;
396 printk(KERN_INFO "GRU space: 0x%lx - 0x%lx\n",
397 gru_start_paddr, gru_end_paddr);
398 irq = get_base_irq();
399 for (chip = 0; chip < GRU_CHIPLETS_PER_BLADE; chip++) {
400 ret = request_irq(irq + chip, gru_intr, 0, id, NULL);
401
402
403 if (ret) {
404 printk("!!!WARNING: GRU ignoring request failure!!!\n");
405 ret = 0;
406 }
407 if (ret) {
408 printk(KERN_ERR "%s: request_irq failed\n",
409 GRU_DRIVER_ID_STR);
410 goto exit1;
411 }
412 }
413
414 ret = misc_register(&gru_miscdev);
415 if (ret) {
416 printk(KERN_ERR "%s: misc_register failed\n",
417 GRU_DRIVER_ID_STR);
418 goto exit1;
419 }
420
421 ret = gru_proc_init();
422 if (ret) {
423 printk(KERN_ERR "%s: proc init failed\n", GRU_DRIVER_ID_STR);
424 goto exit2;
425 }
426
427 ret = gru_init_tables(gru_start_paddr, gru_start_vaddr);
428 if (ret) {
429 printk(KERN_ERR "%s: init tables failed\n", GRU_DRIVER_ID_STR);
430 goto exit3;
431 }
432
433 printk(KERN_INFO "%s: v%s\n", GRU_DRIVER_ID_STR,
434 GRU_DRIVER_VERSION_STR);
435 return 0;
436
437exit3:
438 gru_proc_exit();
439exit2:
440 misc_deregister(&gru_miscdev);
441exit1:
442 for (--chip; chip >= 0; chip--)
443 free_irq(irq + chip, NULL);
444 return ret;
445
446}
447
448static void __exit gru_exit(void)
449{
450 int i, bid;
451 int order = get_order(sizeof(struct gru_state) *
452 GRU_CHIPLETS_PER_BLADE);
453
454 if (!IS_UV())
455 return;
456
457 for (i = 0; i < GRU_CHIPLETS_PER_BLADE; i++)
458 free_irq(IRQ_GRU + i, NULL);
459
460 for (bid = 0; bid < GRU_MAX_BLADES; bid++)
461 free_pages((unsigned long)gru_base[bid], order);
462
463 misc_deregister(&gru_miscdev);
464 gru_proc_exit();
465}
466
467static struct file_operations gru_fops = {
468 .owner = THIS_MODULE,
469 .unlocked_ioctl = gru_file_unlocked_ioctl,
470 .mmap = gru_file_mmap,
471};
472
473static struct miscdevice gru_miscdev = {
474 .minor = MISC_DYNAMIC_MINOR,
475 .name = "gru",
476 .fops = &gru_fops,
477};
478
479struct vm_operations_struct gru_vm_ops = {
480 .close = gru_vma_close,
481 .fault = gru_fault,
482};
483
484fs_initcall(gru_init);
485module_exit(gru_exit);
486
487module_param(gru_options, ulong, 0644);
488MODULE_PARM_DESC(gru_options, "Various debug options");
489
490MODULE_AUTHOR("Silicon Graphics, Inc.");
491MODULE_LICENSE("GPL");
492MODULE_DESCRIPTION(GRU_DRIVER_ID_STR GRU_DRIVER_VERSION_STR);
493MODULE_VERSION(GRU_DRIVER_VERSION_STR);
494
495
