1 /*
2 * SN Platform GRU Driver
3 *
4 * GRU DRIVER TABLES, MACROS, externs, etc
5 *
6 * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23 #ifndef __GRUTABLES_H__
24 #define __GRUTABLES_H__
25
26 /*
27 * GRU Chiplet:
28 * The GRU is a user addressible memory accelerator. It provides
29 * several forms of load, store, memset, bcopy instructions. In addition, it
30 * contains special instructions for AMOs, sending messages to message
31 * queues, etc.
32 *
33 * The GRU is an integral part of the node controller. It connects
34 * directly to the cpu socket. In its current implementation, there are 2
35 * GRU chiplets in the node controller on each blade (~node).
36 *
37 * The entire GRU memory space is fully coherent and cacheable by the cpus.
38 *
39 * Each GRU chiplet has a physical memory map that looks like the following:
40 *
41 * +-----------------+
42 * |/////////////////|
43 * |/////////////////|
44 * |/////////////////|
45 * |/////////////////|
46 * |/////////////////|
47 * |/////////////////|
48 * |/////////////////|
49 * |/////////////////|
50 * +-----------------+
51 * | system control |
52 * +-----------------+ _______ +-------------+
53 * |/////////////////| / | |
54 * |/////////////////| / | |
55 * |/////////////////| / | instructions|
56 * |/////////////////| / | |
57 * |/////////////////| / | |
58 * |/////////////////| / |-------------|
59 * |/////////////////| / | |
60 * +-----------------+ | |
61 * | context 15 | | data |
62 * +-----------------+ | |
63 * | ...... | \ | |
64 * +-----------------+ \____________ +-------------+
65 * | context 1 |
66 * +-----------------+
67 * | context 0 |
68 * +-----------------+
69 *
70 * Each of the "contexts" is a chunk of memory that can be mmaped into user
71 * space. The context consists of 2 parts:
72 *
73 * - an instruction space that can be directly accessed by the user
74 * to issue GRU instructions and to check instruction status.
75 *
76 * - a data area that acts as normal RAM.
77 *
78 * User instructions contain virtual addresses of data to be accessed by the
79 * GRU. The GRU contains a TLB that is used to convert these user virtual
80 * addresses to physical addresses.
81 *
82 * The "system control" area of the GRU chiplet is used by the kernel driver
83 * to manage user contexts and to perform functions such as TLB dropin and
84 * purging.
85 *
86 * One context may be reserved for the kernel and used for cross-partition
87 * communication. The GRU will also be used to asynchronously zero out
88 * large blocks of memory (not currently implemented).
89 *
90 *
91 * Tables:
92 *
93 * VDATA-VMA Data - Holds a few parameters. Head of linked list of
94 * GTS tables for threads using the GSEG
95 * GTS - Gru Thread State - contains info for managing a GSEG context. A
96 * GTS is allocated for each thread accessing a
97 * GSEG.
98 * GTD - GRU Thread Data - contains shadow copy of GRU data when GSEG is
99 * not loaded into a GRU
100 * GMS - GRU Memory Struct - Used to manage TLB shootdowns. Tracks GRUs
101 * where a GSEG has been loaded. Similar to
102 * an mm_struct but for GRU.
103 *
104 * GS - GRU State - Used to manage the state of a GRU chiplet
105 * BS - Blade State - Used to manage state of all GRU chiplets
106 * on a blade
107 *
108 *
109 * Normal task tables for task using GRU.
110 * - 2 threads in process
111 * - 2 GSEGs open in process
112 * - GSEG1 is being used by both threads
113 * - GSEG2 is used only by thread 2
114 *
115 * task -->|
116 * task ---+---> mm ->------ (notifier) -------+-> gms
117 * | |
118 * |--> vma -> vdata ---> gts--->| GSEG1 (thread1)
119 * | | |
120 * | +-> gts--->| GSEG1 (thread2)
121 * | |
122 * |--> vma -> vdata ---> gts--->| GSEG2 (thread2)
123 * .
124 * .
125 *
126 * GSEGs are marked DONTCOPY on fork
127 *
128 * At open
129 * file.private_data -> NULL
130 *
131 * At mmap,
132 * vma -> vdata
133 *
134 * After gseg reference
135 * vma -> vdata ->gts
136 *
137 * After fork
138 * parent
139 * vma -> vdata -> gts
140 * child
141 * (vma is not copied)
142 *
143 */
144
145 #include <linux/rmap.h>
146 #include <linux/interrupt.h>
147 #include <linux/mutex.h>
148 #include <linux/wait.h>
149 #include <linux/mmu_notifier.h>
150 #include <linux/mm_types.h>
151 #include "gru.h"
152 #include "grulib.h"
153 #include "gruhandles.h"
154
155 extern struct gru_stats_s gru_stats;
156 extern struct gru_blade_state *gru_base[];
157 extern unsigned long gru_start_paddr, gru_end_paddr;
158 extern void *gru_start_vaddr;
159 extern unsigned int gru_max_gids;
160
161 #define GRU_MAX_BLADES MAX_NUMNODES
162 #define GRU_MAX_GRUS (GRU_MAX_BLADES * GRU_CHIPLETS_PER_BLADE)
163
164 #define GRU_DRIVER_ID_STR "SGI GRU Device Driver"
165 #define GRU_DRIVER_VERSION_STR "0.85"
166
167 /*
168 * GRU statistics.
169 */
170 struct gru_stats_s {
171 atomic_long_t vdata_alloc;
172 atomic_long_t vdata_free;
173 atomic_long_t gts_alloc;
174 atomic_long_t gts_free;
175 atomic_long_t gms_alloc;
176 atomic_long_t gms_free;
177 atomic_long_t gts_double_allocate;
178 atomic_long_t assign_context;
179 atomic_long_t assign_context_failed;
180 atomic_long_t free_context;
181 atomic_long_t load_user_context;
182 atomic_long_t load_kernel_context;
183 atomic_long_t lock_kernel_context;
184 atomic_long_t unlock_kernel_context;
185 atomic_long_t steal_user_context;
186 atomic_long_t steal_kernel_context;
187 atomic_long_t steal_context_failed;
188 atomic_long_t nopfn;
189 atomic_long_t asid_new;
190 atomic_long_t asid_next;
191 atomic_long_t asid_wrap;
192 atomic_long_t asid_reuse;
193 atomic_long_t intr;
194 atomic_long_t intr_cbr;
195 atomic_long_t intr_tfh;
196 atomic_long_t intr_spurious;
197 atomic_long_t intr_mm_lock_failed;
198 atomic_long_t call_os;
199 atomic_long_t call_os_wait_queue;
200 atomic_long_t user_flush_tlb;
201 atomic_long_t user_unload_context;
202 atomic_long_t user_exception;
203 atomic_long_t set_context_option;
204 atomic_long_t check_context_retarget_intr;
205 atomic_long_t check_context_unload;
206 atomic_long_t tlb_dropin;
207 atomic_long_t tlb_preload_page;
208 atomic_long_t tlb_dropin_fail_no_asid;
209 atomic_long_t tlb_dropin_fail_upm;
210 atomic_long_t tlb_dropin_fail_invalid;
211 atomic_long_t tlb_dropin_fail_range_active;
212 atomic_long_t tlb_dropin_fail_idle;
213 atomic_long_t tlb_dropin_fail_fmm;
214 atomic_long_t tlb_dropin_fail_no_exception;
215 atomic_long_t tfh_stale_on_fault;
216 atomic_long_t mmu_invalidate_range;
217 atomic_long_t mmu_invalidate_page;
218 atomic_long_t flush_tlb;
219 atomic_long_t flush_tlb_gru;
220 atomic_long_t flush_tlb_gru_tgh;
221 atomic_long_t flush_tlb_gru_zero_asid;
222
223 atomic_long_t copy_gpa;
224 atomic_long_t read_gpa;
225
226 atomic_long_t mesq_receive;
227 atomic_long_t mesq_receive_none;
228 atomic_long_t mesq_send;
229 atomic_long_t mesq_send_failed;
230 atomic_long_t mesq_noop;
231 atomic_long_t mesq_send_unexpected_error;
232 atomic_long_t mesq_send_lb_overflow;
233 atomic_long_t mesq_send_qlimit_reached;
234 atomic_long_t mesq_send_amo_nacked;
235 atomic_long_t mesq_send_put_nacked;
236 atomic_long_t mesq_page_overflow;
237 atomic_long_t mesq_qf_locked;
238 atomic_long_t mesq_qf_noop_not_full;
239 atomic_long_t mesq_qf_switch_head_failed;
240 atomic_long_t mesq_qf_unexpected_error;
241 atomic_long_t mesq_noop_unexpected_error;
242 atomic_long_t mesq_noop_lb_overflow;
243 atomic_long_t mesq_noop_qlimit_reached;
244 atomic_long_t mesq_noop_amo_nacked;
245 atomic_long_t mesq_noop_put_nacked;
246 atomic_long_t mesq_noop_page_overflow;
247
248 };
249
250 enum mcs_op {cchop_allocate, cchop_start, cchop_interrupt, cchop_interrupt_sync,
251 cchop_deallocate, tfhop_write_only, tfhop_write_restart,
252 tghop_invalidate, mcsop_last};
253
254 struct mcs_op_statistic {
255 atomic_long_t count;
256 atomic_long_t total;
257 unsigned long max;
258 };
259
260 extern struct mcs_op_statistic mcs_op_statistics[mcsop_last];
261
262 #define OPT_DPRINT 1
263 #define OPT_STATS 2
264
265
266 #define IRQ_GRU 110 /* Starting IRQ number for interrupts */
267
268 /* Delay in jiffies between attempts to assign a GRU context */
269 #define GRU_ASSIGN_DELAY ((HZ * 20) / 1000)
270
271 /*
272 * If a process has it's context stolen, min delay in jiffies before trying to
273 * steal a context from another process.
274 */
275 #define GRU_STEAL_DELAY ((HZ * 200) / 1000)
276
277 #define STAT(id) do { \
278 if (gru_options & OPT_STATS) \
279 atomic_long_inc(&gru_stats.id); \
280 } while (0)
281
282 #ifdef CONFIG_SGI_GRU_DEBUG
283 #define gru_dbg(dev, fmt, x...) \
284 do { \
285 if (gru_options & OPT_DPRINT) \
286 printk(KERN_DEBUG "GRU:%d %s: " fmt, smp_processor_id(), __func__, x);\
287 } while (0)
288 #else
289 #define gru_dbg(x...)
290 #endif
291
292 /*-----------------------------------------------------------------------------
293 * ASID management
294 */
295 #define MAX_ASID 0xfffff0
296 #define MIN_ASID 8
297 #define ASID_INC 8 /* number of regions */
298
299 /* Generate a GRU asid value from a GRU base asid & a virtual address. */
300 #define VADDR_HI_BIT 64
301 #define GRUREGION(addr) ((addr) >> (VADDR_HI_BIT - 3) & 3)
302 #define GRUASID(asid, addr) ((asid) + GRUREGION(addr))
303
304 /*------------------------------------------------------------------------------
305 * File & VMS Tables
306 */
307
308 struct gru_state;
309
310 /*
311 * This structure is pointed to from the mmstruct via the notifier pointer.
312 * There is one of these per address space.
313 */
314 struct gru_mm_tracker { /* pack to reduce size */
315 unsigned int mt_asid_gen:24; /* ASID wrap count */
316 unsigned int mt_asid:24; /* current base ASID for gru */
317 unsigned short mt_ctxbitmap:16;/* bitmap of contexts using
318 asid */
319 } __attribute__ ((packed));
320
321 struct gru_mm_struct {
322 struct mmu_notifier ms_notifier;
323 atomic_t ms_refcnt;
324 spinlock_t ms_asid_lock; /* protects ASID assignment */
325 atomic_t ms_range_active;/* num range_invals active */
326 char ms_released;
327 wait_queue_head_t ms_wait_queue;
328 DECLARE_BITMAP(ms_asidmap, GRU_MAX_GRUS);
329 struct gru_mm_tracker ms_asids[GRU_MAX_GRUS];
330 };
331
332 /*
333 * One of these structures is allocated when a GSEG is mmaped. The
334 * structure is pointed to by the vma->vm_private_data field in the vma struct.
335 */
336 struct gru_vma_data {
337 spinlock_t vd_lock; /* Serialize access to vma */
338 struct list_head vd_head; /* head of linked list of gts */
339 long vd_user_options;/* misc user option flags */
340 int vd_cbr_au_count;
341 int vd_dsr_au_count;
342 unsigned char vd_tlb_preload_count;
343 };
344
345 /*
346 * One of these is allocated for each thread accessing a mmaped GRU. A linked
347 * list of these structure is hung off the struct gru_vma_data in the mm_struct.
348 */
349 struct gru_thread_state {
350 struct list_head ts_next; /* list - head at vma-private */
351 struct mutex ts_ctxlock; /* load/unload CTX lock */
352 struct mm_struct *ts_mm; /* mm currently mapped to
353 context */
354 struct vm_area_struct *ts_vma; /* vma of GRU context */
355 struct gru_state *ts_gru; /* GRU where the context is
356 loaded */
357 struct gru_mm_struct *ts_gms; /* asid & ioproc struct */
358 unsigned char ts_tlb_preload_count; /* TLB preload pages */
359 unsigned long ts_cbr_map; /* map of allocated CBRs */
360 unsigned long ts_dsr_map; /* map of allocated DATA
361 resources */
362 unsigned long ts_steal_jiffies;/* jiffies when context last
363 stolen */
364 long ts_user_options;/* misc user option flags */
365 pid_t ts_tgid_owner; /* task that is using the
366 context - for migration */
367 short ts_user_blade_id;/* user selected blade */
368 char ts_user_chiplet_id;/* user selected chiplet */
369 unsigned short ts_sizeavail; /* Pagesizes in use */
370 int ts_tsid; /* thread that owns the
371 structure */
372 int ts_tlb_int_select;/* target cpu if interrupts
373 enabled */
374 int ts_ctxnum; /* context number where the
375 context is loaded */
376 atomic_t ts_refcnt; /* reference count GTS */
377 unsigned char ts_dsr_au_count;/* Number of DSR resources
378 required for contest */
379 unsigned char ts_cbr_au_count;/* Number of CBR resources
380 required for contest */
381 char ts_cch_req_slice;/* CCH packet slice */
382 char ts_blade; /* If >= 0, migrate context if
383 ref from different blade */
384 char ts_force_cch_reload;
385 char ts_cbr_idx[GRU_CBR_AU];/* CBR numbers of each
386 allocated CB */
387 int ts_data_valid; /* Indicates if ts_gdata has
388 valid data */
389 struct gru_gseg_statistics ustats; /* User statistics */
390 unsigned long ts_gdata[0]; /* save area for GRU data (CB,
391 DS, CBE) */
392 };
393
394 /*
395 * Threaded programs actually allocate an array of GSEGs when a context is
396 * created. Each thread uses a separate GSEG. TSID is the index into the GSEG
397 * array.
398 */
399 #define TSID(a, v) (((a) - (v)->vm_start) / GRU_GSEG_PAGESIZE)
400 #define UGRUADDR(gts) ((gts)->ts_vma->vm_start + \
401 (gts)->ts_tsid * GRU_GSEG_PAGESIZE)
402
403 #define NULLCTX (-1) /* if context not loaded into GRU */
404
405 /*-----------------------------------------------------------------------------
406 * GRU State Tables
407 */
408
409 /*
410 * One of these exists for each GRU chiplet.
411 */
412 struct gru_state {
413 struct gru_blade_state *gs_blade; /* GRU state for entire
414 blade */
415 unsigned long gs_gru_base_paddr; /* Physical address of
416 gru segments (64) */
417 void *gs_gru_base_vaddr; /* Virtual address of
418 gru segments (64) */
419 unsigned short gs_gid; /* unique GRU number */
420 unsigned short gs_blade_id; /* blade of GRU */
421 unsigned char gs_chiplet_id; /* blade chiplet of GRU */
422 unsigned char gs_tgh_local_shift; /* used to pick TGH for
423 local flush */
424 unsigned char gs_tgh_first_remote; /* starting TGH# for
425 remote flush */
426 spinlock_t gs_asid_lock; /* lock used for
427 assigning asids */
428 spinlock_t gs_lock; /* lock used for
429 assigning contexts */
430
431 /* -- the following are protected by the gs_asid_lock spinlock ---- */
432 unsigned int gs_asid; /* Next availe ASID */
433 unsigned int gs_asid_limit; /* Limit of available
434 ASIDs */
435 unsigned int gs_asid_gen; /* asid generation.
436 Inc on wrap */
437
438 /* --- the following fields are protected by the gs_lock spinlock --- */
439 unsigned long gs_context_map; /* bitmap to manage
440 contexts in use */
441 unsigned long gs_cbr_map; /* bitmap to manage CB
442 resources */
443 unsigned long gs_dsr_map; /* bitmap used to manage
444 DATA resources */
445 unsigned int gs_reserved_cbrs; /* Number of kernel-
446 reserved cbrs */
447 unsigned int gs_reserved_dsr_bytes; /* Bytes of kernel-
448 reserved dsrs */
449 unsigned short gs_active_contexts; /* number of contexts
450 in use */
451 struct gru_thread_state *gs_gts[GRU_NUM_CCH]; /* GTS currently using
452 the context */
453 int gs_irq[GRU_NUM_TFM]; /* Interrupt irqs */
454 };
455
456 /*
457 * This structure contains the GRU state for all the GRUs on a blade.
458 */
459 struct gru_blade_state {
460 void *kernel_cb; /* First kernel
461 reserved cb */
462 void *kernel_dsr; /* First kernel
463 reserved DSR */
464 struct rw_semaphore bs_kgts_sema; /* lock for kgts */
465 struct gru_thread_state *bs_kgts; /* GTS for kernel use */
466
467 /* ---- the following are used for managing kernel async GRU CBRs --- */
468 int bs_async_dsr_bytes; /* DSRs for async */
469 int bs_async_cbrs; /* CBRs AU for async */
470 struct completion *bs_async_wq;
471
472 /* ---- the following are protected by the bs_lock spinlock ---- */
473 spinlock_t bs_lock; /* lock used for
474 stealing contexts */
475 int bs_lru_ctxnum; /* STEAL - last context
476 stolen */
477 struct gru_state *bs_lru_gru; /* STEAL - last gru
478 stolen */
479
480 struct gru_state bs_grus[GRU_CHIPLETS_PER_BLADE];
481 };
482
483 /*-----------------------------------------------------------------------------
484 * Address Primitives
485 */
486 #define get_tfm_for_cpu(g, c) \
487 ((struct gru_tlb_fault_map *)get_tfm((g)->gs_gru_base_vaddr, (c)))
488 #define get_tfh_by_index(g, i) \
489 ((struct gru_tlb_fault_handle *)get_tfh((g)->gs_gru_base_vaddr, (i)))
490 #define get_tgh_by_index(g, i) \
491 ((struct gru_tlb_global_handle *)get_tgh((g)->gs_gru_base_vaddr, (i)))
492 #define get_cbe_by_index(g, i) \
493 ((struct gru_control_block_extended *)get_cbe((g)->gs_gru_base_vaddr,\
494 (i)))
495
496 /*-----------------------------------------------------------------------------
497 * Useful Macros
498 */
499
500 /* Given a blade# & chiplet#, get a pointer to the GRU */
501 #define get_gru(b, c) (&gru_base[b]->bs_grus[c])
502
503 /* Number of bytes to save/restore when unloading/loading GRU contexts */
504 #define DSR_BYTES(dsr) ((dsr) * GRU_DSR_AU_BYTES)
505 #define CBR_BYTES(cbr) ((cbr) * GRU_HANDLE_BYTES * GRU_CBR_AU_SIZE * 2)
506
507 /* Convert a user CB number to the actual CBRNUM */
508 #define thread_cbr_number(gts, n) ((gts)->ts_cbr_idx[(n) / GRU_CBR_AU_SIZE] \
509 * GRU_CBR_AU_SIZE + (n) % GRU_CBR_AU_SIZE)
510
511 /* Convert a gid to a pointer to the GRU */
512 #define GID_TO_GRU(gid) \
513 (gru_base[(gid) / GRU_CHIPLETS_PER_BLADE] ? \
514 (&gru_base[(gid) / GRU_CHIPLETS_PER_BLADE]-> \
515 bs_grus[(gid) % GRU_CHIPLETS_PER_BLADE]) : \
516 NULL)
517
518 /* Scan all active GRUs in a GRU bitmap */
519 #define for_each_gru_in_bitmap(gid, map) \
520 for_each_set_bit((gid), (map), GRU_MAX_GRUS)
521
522 /* Scan all active GRUs on a specific blade */
523 #define for_each_gru_on_blade(gru, nid, i) \
524 for ((gru) = gru_base[nid]->bs_grus, (i) = 0; \
525 (i) < GRU_CHIPLETS_PER_BLADE; \
526 (i)++, (gru)++)
527
528 /* Scan all GRUs */
529 #define foreach_gid(gid) \
530 for ((gid) = 0; (gid) < gru_max_gids; (gid)++)
531
532 /* Scan all active GTSs on a gru. Note: must hold ss_lock to use this macro. */
533 #define for_each_gts_on_gru(gts, gru, ctxnum) \
534 for ((ctxnum) = 0; (ctxnum) < GRU_NUM_CCH; (ctxnum)++) \
535 if (((gts) = (gru)->gs_gts[ctxnum]))
536
537 /* Scan each CBR whose bit is set in a TFM (or copy of) */
538 #define for_each_cbr_in_tfm(i, map) \
539 for_each_set_bit((i), (map), GRU_NUM_CBE)
540
541 /* Scan each CBR in a CBR bitmap. Note: multiple CBRs in an allocation unit */
542 #define for_each_cbr_in_allocation_map(i, map, k) \
543 for_each_set_bit((k), (map), GRU_CBR_AU) \
544 for ((i) = (k)*GRU_CBR_AU_SIZE; \
545 (i) < ((k) + 1) * GRU_CBR_AU_SIZE; (i)++)
546
547 /* Scan each DSR in a DSR bitmap. Note: multiple DSRs in an allocation unit */
548 #define for_each_dsr_in_allocation_map(i, map, k) \
549 for_each_set_bit((k), (const unsigned long *)(map), GRU_DSR_AU) \
550 for ((i) = (k) * GRU_DSR_AU_CL; \
551 (i) < ((k) + 1) * GRU_DSR_AU_CL; (i)++)
552
553 #define gseg_physical_address(gru, ctxnum) \
554 ((gru)->gs_gru_base_paddr + ctxnum * GRU_GSEG_STRIDE)
555 #define gseg_virtual_address(gru, ctxnum) \
556 ((gru)->gs_gru_base_vaddr + ctxnum * GRU_GSEG_STRIDE)
557
558 /*-----------------------------------------------------------------------------
559 * Lock / Unlock GRU handles
560 * Use the "delresp" bit in the handle as a "lock" bit.
561 */
562
563 /* Lock hierarchy checking enabled only in emulator */
564
565 /* 0 = lock failed, 1 = locked */
__trylock_handle(void * h)566 static inline int __trylock_handle(void *h)
567 {
568 return !test_and_set_bit(1, h);
569 }
570
__lock_handle(void * h)571 static inline void __lock_handle(void *h)
572 {
573 while (test_and_set_bit(1, h))
574 cpu_relax();
575 }
576
__unlock_handle(void * h)577 static inline void __unlock_handle(void *h)
578 {
579 clear_bit(1, h);
580 }
581
trylock_cch_handle(struct gru_context_configuration_handle * cch)582 static inline int trylock_cch_handle(struct gru_context_configuration_handle *cch)
583 {
584 return __trylock_handle(cch);
585 }
586
lock_cch_handle(struct gru_context_configuration_handle * cch)587 static inline void lock_cch_handle(struct gru_context_configuration_handle *cch)
588 {
589 __lock_handle(cch);
590 }
591
unlock_cch_handle(struct gru_context_configuration_handle * cch)592 static inline void unlock_cch_handle(struct gru_context_configuration_handle
593 *cch)
594 {
595 __unlock_handle(cch);
596 }
597
lock_tgh_handle(struct gru_tlb_global_handle * tgh)598 static inline void lock_tgh_handle(struct gru_tlb_global_handle *tgh)
599 {
600 __lock_handle(tgh);
601 }
602
unlock_tgh_handle(struct gru_tlb_global_handle * tgh)603 static inline void unlock_tgh_handle(struct gru_tlb_global_handle *tgh)
604 {
605 __unlock_handle(tgh);
606 }
607
is_kernel_context(struct gru_thread_state * gts)608 static inline int is_kernel_context(struct gru_thread_state *gts)
609 {
610 return !gts->ts_mm;
611 }
612
613 /*
614 * The following are for Nehelem-EX. A more general scheme is needed for
615 * future processors.
616 */
617 #define UV_MAX_INT_CORES 8
618 #define uv_cpu_socket_number(p) ((cpu_physical_id(p) >> 5) & 1)
619 #define uv_cpu_ht_number(p) (cpu_physical_id(p) & 1)
620 #define uv_cpu_core_number(p) (((cpu_physical_id(p) >> 2) & 4) | \
621 ((cpu_physical_id(p) >> 1) & 3))
622 /*-----------------------------------------------------------------------------
623 * Function prototypes & externs
624 */
625 struct gru_unload_context_req;
626
627 extern const struct vm_operations_struct gru_vm_ops;
628 extern struct device *grudev;
629
630 extern struct gru_vma_data *gru_alloc_vma_data(struct vm_area_struct *vma,
631 int tsid);
632 extern struct gru_thread_state *gru_find_thread_state(struct vm_area_struct
633 *vma, int tsid);
634 extern struct gru_thread_state *gru_alloc_thread_state(struct vm_area_struct
635 *vma, int tsid);
636 extern struct gru_state *gru_assign_gru_context(struct gru_thread_state *gts);
637 extern void gru_load_context(struct gru_thread_state *gts);
638 extern void gru_steal_context(struct gru_thread_state *gts);
639 extern void gru_unload_context(struct gru_thread_state *gts, int savestate);
640 extern int gru_update_cch(struct gru_thread_state *gts);
641 extern void gts_drop(struct gru_thread_state *gts);
642 extern void gru_tgh_flush_init(struct gru_state *gru);
643 extern int gru_kservices_init(void);
644 extern void gru_kservices_exit(void);
645 extern irqreturn_t gru0_intr(int irq, void *dev_id);
646 extern irqreturn_t gru1_intr(int irq, void *dev_id);
647 extern irqreturn_t gru_intr_mblade(int irq, void *dev_id);
648 extern int gru_dump_chiplet_request(unsigned long arg);
649 extern long gru_get_gseg_statistics(unsigned long arg);
650 extern int gru_handle_user_call_os(unsigned long address);
651 extern int gru_user_flush_tlb(unsigned long arg);
652 extern int gru_user_unload_context(unsigned long arg);
653 extern int gru_get_exception_detail(unsigned long arg);
654 extern int gru_set_context_option(unsigned long address);
655 extern int gru_check_context_placement(struct gru_thread_state *gts);
656 extern int gru_cpu_fault_map_id(void);
657 extern struct vm_area_struct *gru_find_vma(unsigned long vaddr);
658 extern void gru_flush_all_tlb(struct gru_state *gru);
659 extern int gru_proc_init(void);
660 extern void gru_proc_exit(void);
661
662 extern struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma,
663 int cbr_au_count, int dsr_au_count,
664 unsigned char tlb_preload_count, int options, int tsid);
665 extern unsigned long gru_reserve_cb_resources(struct gru_state *gru,
666 int cbr_au_count, char *cbmap);
667 extern unsigned long gru_reserve_ds_resources(struct gru_state *gru,
668 int dsr_au_count, char *dsmap);
669 extern vm_fault_t gru_fault(struct vm_fault *vmf);
670 extern struct gru_mm_struct *gru_register_mmu_notifier(void);
671 extern void gru_drop_mmu_notifier(struct gru_mm_struct *gms);
672
673 extern int gru_ktest(unsigned long arg);
674 extern void gru_flush_tlb_range(struct gru_mm_struct *gms, unsigned long start,
675 unsigned long len);
676
677 extern unsigned long gru_options;
678
679 #endif /* __GRUTABLES_H__ */
680