1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * SN Platform GRU Driver
4  *
5  *            GRU DRIVER TABLES, MACROS, externs, etc
6  *
7  *  Copyright (c) 2008 Silicon Graphics, Inc.  All Rights Reserved.
8  */
9 
10 #ifndef __GRUTABLES_H__
11 #define __GRUTABLES_H__
12 
13 /*
14  * GRU Chiplet:
15  *   The GRU is a user addressible memory accelerator. It provides
16  *   several forms of load, store, memset, bcopy instructions. In addition, it
17  *   contains special instructions for AMOs, sending messages to message
18  *   queues, etc.
19  *
20  *   The GRU is an integral part of the node controller. It connects
21  *   directly to the cpu socket. In its current implementation, there are 2
22  *   GRU chiplets in the node controller on each blade (~node).
23  *
24  *   The entire GRU memory space is fully coherent and cacheable by the cpus.
25  *
26  *   Each GRU chiplet has a physical memory map that looks like the following:
27  *
28  *   	+-----------------+
29  *   	|/////////////////|
30  *   	|/////////////////|
31  *   	|/////////////////|
32  *   	|/////////////////|
33  *   	|/////////////////|
34  *   	|/////////////////|
35  *   	|/////////////////|
36  *   	|/////////////////|
37  *   	+-----------------+
38  *   	|  system control |
39  *   	+-----------------+        _______ +-------------+
40  *   	|/////////////////|       /        |             |
41  *   	|/////////////////|      /         |             |
42  *   	|/////////////////|     /          | instructions|
43  *   	|/////////////////|    /           |             |
44  *   	|/////////////////|   /            |             |
45  *   	|/////////////////|  /             |-------------|
46  *   	|/////////////////| /              |             |
47  *   	+-----------------+                |             |
48  *   	|   context 15    |                |  data       |
49  *   	+-----------------+                |             |
50  *   	|    ......       | \              |             |
51  *   	+-----------------+  \____________ +-------------+
52  *   	|   context 1     |
53  *   	+-----------------+
54  *   	|   context 0     |
55  *   	+-----------------+
56  *
57  *   Each of the "contexts" is a chunk of memory that can be mmaped into user
58  *   space. The context consists of 2 parts:
59  *
60  *  	- an instruction space that can be directly accessed by the user
61  *  	  to issue GRU instructions and to check instruction status.
62  *
63  *  	- a data area that acts as normal RAM.
64  *
65  *   User instructions contain virtual addresses of data to be accessed by the
66  *   GRU. The GRU contains a TLB that is used to convert these user virtual
67  *   addresses to physical addresses.
68  *
69  *   The "system control" area of the GRU chiplet is used by the kernel driver
70  *   to manage user contexts and to perform functions such as TLB dropin and
71  *   purging.
72  *
73  *   One context may be reserved for the kernel and used for cross-partition
74  *   communication. The GRU will also be used to asynchronously zero out
75  *   large blocks of memory (not currently implemented).
76  *
77  *
78  * Tables:
79  *
80  * 	VDATA-VMA Data		- Holds a few parameters. Head of linked list of
81  * 				  GTS tables for threads using the GSEG
82  * 	GTS - Gru Thread State  - contains info for managing a GSEG context. A
83  * 				  GTS is allocated for each thread accessing a
84  * 				  GSEG.
85  *     	GTD - GRU Thread Data   - contains shadow copy of GRU data when GSEG is
86  *     				  not loaded into a GRU
87  *	GMS - GRU Memory Struct - Used to manage TLB shootdowns. Tracks GRUs
88  *				  where a GSEG has been loaded. Similar to
89  *				  an mm_struct but for GRU.
90  *
91  *	GS  - GRU State 	- Used to manage the state of a GRU chiplet
92  *	BS  - Blade State	- Used to manage state of all GRU chiplets
93  *				  on a blade
94  *
95  *
96  *  Normal task tables for task using GRU.
97  *  		- 2 threads in process
98  *  		- 2 GSEGs open in process
99  *  		- GSEG1 is being used by both threads
100  *  		- GSEG2 is used only by thread 2
101  *
102  *       task -->|
103  *       task ---+---> mm ->------ (notifier) -------+-> gms
104  *                     |                             |
105  *                     |--> vma -> vdata ---> gts--->|		GSEG1 (thread1)
106  *                     |                  |          |
107  *                     |                  +-> gts--->|		GSEG1 (thread2)
108  *                     |                             |
109  *                     |--> vma -> vdata ---> gts--->|		GSEG2 (thread2)
110  *                     .
111  *                     .
112  *
113  *  GSEGs are marked DONTCOPY on fork
114  *
115  * At open
116  * 	file.private_data -> NULL
117  *
118  * At mmap,
119  * 	vma -> vdata
120  *
121  * After gseg reference
122  * 	vma -> vdata ->gts
123  *
124  * After fork
125  *   parent
126  * 	vma -> vdata -> gts
127  *   child
128  * 	(vma is not copied)
129  *
130  */
131 
132 #include <linux/refcount.h>
133 #include <linux/rmap.h>
134 #include <linux/interrupt.h>
135 #include <linux/mutex.h>
136 #include <linux/wait.h>
137 #include <linux/mmu_notifier.h>
138 #include <linux/mm_types.h>
139 #include "gru.h"
140 #include "grulib.h"
141 #include "gruhandles.h"
142 
143 extern struct gru_stats_s gru_stats;
144 extern struct gru_blade_state *gru_base[];
145 extern unsigned long gru_start_paddr, gru_end_paddr;
146 extern void *gru_start_vaddr;
147 extern unsigned int gru_max_gids;
148 
149 #define GRU_MAX_BLADES		MAX_NUMNODES
150 #define GRU_MAX_GRUS		(GRU_MAX_BLADES * GRU_CHIPLETS_PER_BLADE)
151 
152 #define GRU_DRIVER_ID_STR	"SGI GRU Device Driver"
153 #define GRU_DRIVER_VERSION_STR	"0.85"
154 
155 /*
156  * GRU statistics.
157  */
158 struct gru_stats_s {
159 	atomic_long_t vdata_alloc;
160 	atomic_long_t vdata_free;
161 	atomic_long_t gts_alloc;
162 	atomic_long_t gts_free;
163 	atomic_long_t gms_alloc;
164 	atomic_long_t gms_free;
165 	atomic_long_t gts_double_allocate;
166 	atomic_long_t assign_context;
167 	atomic_long_t assign_context_failed;
168 	atomic_long_t free_context;
169 	atomic_long_t load_user_context;
170 	atomic_long_t load_kernel_context;
171 	atomic_long_t lock_kernel_context;
172 	atomic_long_t unlock_kernel_context;
173 	atomic_long_t steal_user_context;
174 	atomic_long_t steal_kernel_context;
175 	atomic_long_t steal_context_failed;
176 	atomic_long_t nopfn;
177 	atomic_long_t asid_new;
178 	atomic_long_t asid_next;
179 	atomic_long_t asid_wrap;
180 	atomic_long_t asid_reuse;
181 	atomic_long_t intr;
182 	atomic_long_t intr_cbr;
183 	atomic_long_t intr_tfh;
184 	atomic_long_t intr_spurious;
185 	atomic_long_t intr_mm_lock_failed;
186 	atomic_long_t call_os;
187 	atomic_long_t call_os_wait_queue;
188 	atomic_long_t user_flush_tlb;
189 	atomic_long_t user_unload_context;
190 	atomic_long_t user_exception;
191 	atomic_long_t set_context_option;
192 	atomic_long_t check_context_retarget_intr;
193 	atomic_long_t check_context_unload;
194 	atomic_long_t tlb_dropin;
195 	atomic_long_t tlb_preload_page;
196 	atomic_long_t tlb_dropin_fail_no_asid;
197 	atomic_long_t tlb_dropin_fail_upm;
198 	atomic_long_t tlb_dropin_fail_invalid;
199 	atomic_long_t tlb_dropin_fail_range_active;
200 	atomic_long_t tlb_dropin_fail_idle;
201 	atomic_long_t tlb_dropin_fail_fmm;
202 	atomic_long_t tlb_dropin_fail_no_exception;
203 	atomic_long_t tfh_stale_on_fault;
204 	atomic_long_t mmu_invalidate_range;
205 	atomic_long_t mmu_invalidate_page;
206 	atomic_long_t flush_tlb;
207 	atomic_long_t flush_tlb_gru;
208 	atomic_long_t flush_tlb_gru_tgh;
209 	atomic_long_t flush_tlb_gru_zero_asid;
210 
211 	atomic_long_t copy_gpa;
212 	atomic_long_t read_gpa;
213 
214 	atomic_long_t mesq_receive;
215 	atomic_long_t mesq_receive_none;
216 	atomic_long_t mesq_send;
217 	atomic_long_t mesq_send_failed;
218 	atomic_long_t mesq_noop;
219 	atomic_long_t mesq_send_unexpected_error;
220 	atomic_long_t mesq_send_lb_overflow;
221 	atomic_long_t mesq_send_qlimit_reached;
222 	atomic_long_t mesq_send_amo_nacked;
223 	atomic_long_t mesq_send_put_nacked;
224 	atomic_long_t mesq_page_overflow;
225 	atomic_long_t mesq_qf_locked;
226 	atomic_long_t mesq_qf_noop_not_full;
227 	atomic_long_t mesq_qf_switch_head_failed;
228 	atomic_long_t mesq_qf_unexpected_error;
229 	atomic_long_t mesq_noop_unexpected_error;
230 	atomic_long_t mesq_noop_lb_overflow;
231 	atomic_long_t mesq_noop_qlimit_reached;
232 	atomic_long_t mesq_noop_amo_nacked;
233 	atomic_long_t mesq_noop_put_nacked;
234 	atomic_long_t mesq_noop_page_overflow;
235 
236 };
237 
238 enum mcs_op {cchop_allocate, cchop_start, cchop_interrupt, cchop_interrupt_sync,
239 	cchop_deallocate, tfhop_write_only, tfhop_write_restart,
240 	tghop_invalidate, mcsop_last};
241 
242 struct mcs_op_statistic {
243 	atomic_long_t	count;
244 	atomic_long_t	total;
245 	unsigned long	max;
246 };
247 
248 extern struct mcs_op_statistic mcs_op_statistics[mcsop_last];
249 
250 #define OPT_DPRINT		1
251 #define OPT_STATS		2
252 
253 
254 #define IRQ_GRU			110	/* Starting IRQ number for interrupts */
255 
256 /* Delay in jiffies between attempts to assign a GRU context */
257 #define GRU_ASSIGN_DELAY	((HZ * 20) / 1000)
258 
259 /*
260  * If a process has it's context stolen, min delay in jiffies before trying to
261  * steal a context from another process.
262  */
263 #define GRU_STEAL_DELAY		((HZ * 200) / 1000)
264 
265 #define STAT(id)	do {						\
266 				if (gru_options & OPT_STATS)		\
267 					atomic_long_inc(&gru_stats.id);	\
268 			} while (0)
269 
270 #ifdef CONFIG_SGI_GRU_DEBUG
271 #define gru_dbg(dev, fmt, x...)						\
272 	do {								\
273 		if (gru_options & OPT_DPRINT)				\
274 			printk(KERN_DEBUG "GRU:%d %s: " fmt, smp_processor_id(), __func__, x);\
275 	} while (0)
276 #else
277 #define gru_dbg(x...)
278 #endif
279 
280 /*-----------------------------------------------------------------------------
281  * ASID management
282  */
283 #define MAX_ASID	0xfffff0
284 #define MIN_ASID	8
285 #define ASID_INC	8	/* number of regions */
286 
287 /* Generate a GRU asid value from a GRU base asid & a virtual address. */
288 #define VADDR_HI_BIT		64
289 #define GRUREGION(addr)		((addr) >> (VADDR_HI_BIT - 3) & 3)
290 #define GRUASID(asid, addr)	((asid) + GRUREGION(addr))
291 
292 /*------------------------------------------------------------------------------
293  *  File & VMS Tables
294  */
295 
296 struct gru_state;
297 
298 /*
299  * This structure is pointed to from the mmstruct via the notifier pointer.
300  * There is one of these per address space.
301  */
302 struct gru_mm_tracker {				/* pack to reduce size */
303 	unsigned int		mt_asid_gen:24;	/* ASID wrap count */
304 	unsigned int		mt_asid:24;	/* current base ASID for gru */
305 	unsigned short		mt_ctxbitmap:16;/* bitmap of contexts using
306 						   asid */
307 } __attribute__ ((packed));
308 
309 struct gru_mm_struct {
310 	struct mmu_notifier	ms_notifier;
311 	spinlock_t		ms_asid_lock;	/* protects ASID assignment */
312 	atomic_t		ms_range_active;/* num range_invals active */
313 	wait_queue_head_t	ms_wait_queue;
314 	DECLARE_BITMAP(ms_asidmap, GRU_MAX_GRUS);
315 	struct gru_mm_tracker	ms_asids[GRU_MAX_GRUS];
316 };
317 
318 /*
319  * One of these structures is allocated when a GSEG is mmaped. The
320  * structure is pointed to by the vma->vm_private_data field in the vma struct.
321  */
322 struct gru_vma_data {
323 	spinlock_t		vd_lock;	/* Serialize access to vma */
324 	struct list_head	vd_head;	/* head of linked list of gts */
325 	long			vd_user_options;/* misc user option flags */
326 	int			vd_cbr_au_count;
327 	int			vd_dsr_au_count;
328 	unsigned char		vd_tlb_preload_count;
329 };
330 
331 /*
332  * One of these is allocated for each thread accessing a mmaped GRU. A linked
333  * list of these structure is hung off the struct gru_vma_data in the mm_struct.
334  */
335 struct gru_thread_state {
336 	struct list_head	ts_next;	/* list - head at vma-private */
337 	struct mutex		ts_ctxlock;	/* load/unload CTX lock */
338 	struct mm_struct	*ts_mm;		/* mm currently mapped to
339 						   context */
340 	struct vm_area_struct	*ts_vma;	/* vma of GRU context */
341 	struct gru_state	*ts_gru;	/* GRU where the context is
342 						   loaded */
343 	struct gru_mm_struct	*ts_gms;	/* asid & ioproc struct */
344 	unsigned char		ts_tlb_preload_count; /* TLB preload pages */
345 	unsigned long		ts_cbr_map;	/* map of allocated CBRs */
346 	unsigned long		ts_dsr_map;	/* map of allocated DATA
347 						   resources */
348 	unsigned long		ts_steal_jiffies;/* jiffies when context last
349 						    stolen */
350 	long			ts_user_options;/* misc user option flags */
351 	pid_t			ts_tgid_owner;	/* task that is using the
352 						   context - for migration */
353 	short			ts_user_blade_id;/* user selected blade */
354 	signed char		ts_user_chiplet_id;/* user selected chiplet */
355 	unsigned short		ts_sizeavail;	/* Pagesizes in use */
356 	int			ts_tsid;	/* thread that owns the
357 						   structure */
358 	int			ts_tlb_int_select;/* target cpu if interrupts
359 						     enabled */
360 	int			ts_ctxnum;	/* context number where the
361 						   context is loaded */
362 	refcount_t		ts_refcnt;	/* reference count GTS */
363 	unsigned char		ts_dsr_au_count;/* Number of DSR resources
364 						   required for contest */
365 	unsigned char		ts_cbr_au_count;/* Number of CBR resources
366 						   required for contest */
367 	signed char		ts_cch_req_slice;/* CCH packet slice */
368 	signed char		ts_blade;	/* If >= 0, migrate context if
369 						   ref from different blade */
370 	signed char		ts_force_cch_reload;
371 	signed char		ts_cbr_idx[GRU_CBR_AU];/* CBR numbers of each
372 							  allocated CB */
373 	int			ts_data_valid;	/* Indicates if ts_gdata has
374 						   valid data */
375 	struct gru_gseg_statistics ustats;	/* User statistics */
376 	unsigned long		ts_gdata[];	/* save area for GRU data (CB,
377 						   DS, CBE) */
378 };
379 
380 /*
381  * Threaded programs actually allocate an array of GSEGs when a context is
382  * created. Each thread uses a separate GSEG. TSID is the index into the GSEG
383  * array.
384  */
385 #define TSID(a, v)		(((a) - (v)->vm_start) / GRU_GSEG_PAGESIZE)
386 #define UGRUADDR(gts)		((gts)->ts_vma->vm_start +		\
387 					(gts)->ts_tsid * GRU_GSEG_PAGESIZE)
388 
389 #define NULLCTX			(-1)	/* if context not loaded into GRU */
390 
391 /*-----------------------------------------------------------------------------
392  *  GRU State Tables
393  */
394 
395 /*
396  * One of these exists for each GRU chiplet.
397  */
398 struct gru_state {
399 	struct gru_blade_state	*gs_blade;		/* GRU state for entire
400 							   blade */
401 	unsigned long		gs_gru_base_paddr;	/* Physical address of
402 							   gru segments (64) */
403 	void			*gs_gru_base_vaddr;	/* Virtual address of
404 							   gru segments (64) */
405 	unsigned short		gs_gid;			/* unique GRU number */
406 	unsigned short		gs_blade_id;		/* blade of GRU */
407 	unsigned char		gs_chiplet_id;		/* blade chiplet of GRU */
408 	unsigned char		gs_tgh_local_shift;	/* used to pick TGH for
409 							   local flush */
410 	unsigned char		gs_tgh_first_remote;	/* starting TGH# for
411 							   remote flush */
412 	spinlock_t		gs_asid_lock;		/* lock used for
413 							   assigning asids */
414 	spinlock_t		gs_lock;		/* lock used for
415 							   assigning contexts */
416 
417 	/* -- the following are protected by the gs_asid_lock spinlock ---- */
418 	unsigned int		gs_asid;		/* Next availe ASID */
419 	unsigned int		gs_asid_limit;		/* Limit of available
420 							   ASIDs */
421 	unsigned int		gs_asid_gen;		/* asid generation.
422 							   Inc on wrap */
423 
424 	/* --- the following fields are protected by the gs_lock spinlock --- */
425 	unsigned long		gs_context_map;		/* bitmap to manage
426 							   contexts in use */
427 	unsigned long		gs_cbr_map;		/* bitmap to manage CB
428 							   resources */
429 	unsigned long		gs_dsr_map;		/* bitmap used to manage
430 							   DATA resources */
431 	unsigned int		gs_reserved_cbrs;	/* Number of kernel-
432 							   reserved cbrs */
433 	unsigned int		gs_reserved_dsr_bytes;	/* Bytes of kernel-
434 							   reserved dsrs */
435 	unsigned short		gs_active_contexts;	/* number of contexts
436 							   in use */
437 	struct gru_thread_state	*gs_gts[GRU_NUM_CCH];	/* GTS currently using
438 							   the context */
439 	int			gs_irq[GRU_NUM_TFM];	/* Interrupt irqs */
440 };
441 
442 /*
443  * This structure contains the GRU state for all the GRUs on a blade.
444  */
445 struct gru_blade_state {
446 	void			*kernel_cb;		/* First kernel
447 							   reserved cb */
448 	void			*kernel_dsr;		/* First kernel
449 							   reserved DSR */
450 	struct rw_semaphore	bs_kgts_sema;		/* lock for kgts */
451 	struct gru_thread_state *bs_kgts;		/* GTS for kernel use */
452 
453 	/* ---- the following are used for managing kernel async GRU CBRs --- */
454 	int			bs_async_dsr_bytes;	/* DSRs for async */
455 	int			bs_async_cbrs;		/* CBRs AU for async */
456 	struct completion	*bs_async_wq;
457 
458 	/* ---- the following are protected by the bs_lock spinlock ---- */
459 	spinlock_t		bs_lock;		/* lock used for
460 							   stealing contexts */
461 	int			bs_lru_ctxnum;		/* STEAL - last context
462 							   stolen */
463 	struct gru_state	*bs_lru_gru;		/* STEAL - last gru
464 							   stolen */
465 
466 	struct gru_state	bs_grus[GRU_CHIPLETS_PER_BLADE];
467 };
468 
469 /*-----------------------------------------------------------------------------
470  * Address Primitives
471  */
472 #define get_tfm_for_cpu(g, c)						\
473 	((struct gru_tlb_fault_map *)get_tfm((g)->gs_gru_base_vaddr, (c)))
474 #define get_tfh_by_index(g, i)						\
475 	((struct gru_tlb_fault_handle *)get_tfh((g)->gs_gru_base_vaddr, (i)))
476 #define get_tgh_by_index(g, i)						\
477 	((struct gru_tlb_global_handle *)get_tgh((g)->gs_gru_base_vaddr, (i)))
478 #define get_cbe_by_index(g, i)						\
479 	((struct gru_control_block_extended *)get_cbe((g)->gs_gru_base_vaddr,\
480 			(i)))
481 
482 /*-----------------------------------------------------------------------------
483  * Useful Macros
484  */
485 
486 /* Given a blade# & chiplet#, get a pointer to the GRU */
487 #define get_gru(b, c)		(&gru_base[b]->bs_grus[c])
488 
489 /* Number of bytes to save/restore when unloading/loading GRU contexts */
490 #define DSR_BYTES(dsr)		((dsr) * GRU_DSR_AU_BYTES)
491 #define CBR_BYTES(cbr)		((cbr) * GRU_HANDLE_BYTES * GRU_CBR_AU_SIZE * 2)
492 
493 /* Convert a user CB number to the actual CBRNUM */
494 #define thread_cbr_number(gts, n) ((gts)->ts_cbr_idx[(n) / GRU_CBR_AU_SIZE] \
495 				  * GRU_CBR_AU_SIZE + (n) % GRU_CBR_AU_SIZE)
496 
497 /* Convert a gid to a pointer to the GRU */
498 #define GID_TO_GRU(gid)							\
499 	(gru_base[(gid) / GRU_CHIPLETS_PER_BLADE] ?			\
500 		(&gru_base[(gid) / GRU_CHIPLETS_PER_BLADE]->		\
501 			bs_grus[(gid) % GRU_CHIPLETS_PER_BLADE]) :	\
502 	 NULL)
503 
504 /* Scan all active GRUs in a GRU bitmap */
505 #define for_each_gru_in_bitmap(gid, map)				\
506 	for_each_set_bit((gid), (map), GRU_MAX_GRUS)
507 
508 /* Scan all active GRUs on a specific blade */
509 #define for_each_gru_on_blade(gru, nid, i)				\
510 	for ((gru) = gru_base[nid]->bs_grus, (i) = 0;			\
511 			(i) < GRU_CHIPLETS_PER_BLADE;			\
512 			(i)++, (gru)++)
513 
514 /* Scan all GRUs */
515 #define foreach_gid(gid)						\
516 	for ((gid) = 0; (gid) < gru_max_gids; (gid)++)
517 
518 /* Scan all active GTSs on a gru. Note: must hold ss_lock to use this macro. */
519 #define for_each_gts_on_gru(gts, gru, ctxnum)				\
520 	for ((ctxnum) = 0; (ctxnum) < GRU_NUM_CCH; (ctxnum)++)		\
521 		if (((gts) = (gru)->gs_gts[ctxnum]))
522 
523 /* Scan each CBR whose bit is set in a TFM (or copy of) */
524 #define for_each_cbr_in_tfm(i, map)					\
525 	for_each_set_bit((i), (map), GRU_NUM_CBE)
526 
527 /* Scan each CBR in a CBR bitmap. Note: multiple CBRs in an allocation unit */
528 #define for_each_cbr_in_allocation_map(i, map, k)			\
529 	for_each_set_bit((k), (map), GRU_CBR_AU)			\
530 		for ((i) = (k)*GRU_CBR_AU_SIZE;				\
531 				(i) < ((k) + 1) * GRU_CBR_AU_SIZE; (i)++)
532 
533 #define gseg_physical_address(gru, ctxnum)				\
534 		((gru)->gs_gru_base_paddr + ctxnum * GRU_GSEG_STRIDE)
535 #define gseg_virtual_address(gru, ctxnum)				\
536 		((gru)->gs_gru_base_vaddr + ctxnum * GRU_GSEG_STRIDE)
537 
538 /*-----------------------------------------------------------------------------
539  * Lock / Unlock GRU handles
540  * 	Use the "delresp" bit in the handle as a "lock" bit.
541  */
542 
543 /* Lock hierarchy checking enabled only in emulator */
544 
545 /* 0 = lock failed, 1 = locked */
__trylock_handle(void * h)546 static inline int __trylock_handle(void *h)
547 {
548 	return !test_and_set_bit(1, h);
549 }
550 
__lock_handle(void * h)551 static inline void __lock_handle(void *h)
552 {
553 	while (test_and_set_bit(1, h))
554 		cpu_relax();
555 }
556 
__unlock_handle(void * h)557 static inline void __unlock_handle(void *h)
558 {
559 	clear_bit(1, h);
560 }
561 
trylock_cch_handle(struct gru_context_configuration_handle * cch)562 static inline int trylock_cch_handle(struct gru_context_configuration_handle *cch)
563 {
564 	return __trylock_handle(cch);
565 }
566 
lock_cch_handle(struct gru_context_configuration_handle * cch)567 static inline void lock_cch_handle(struct gru_context_configuration_handle *cch)
568 {
569 	__lock_handle(cch);
570 }
571 
unlock_cch_handle(struct gru_context_configuration_handle * cch)572 static inline void unlock_cch_handle(struct gru_context_configuration_handle
573 				     *cch)
574 {
575 	__unlock_handle(cch);
576 }
577 
lock_tgh_handle(struct gru_tlb_global_handle * tgh)578 static inline void lock_tgh_handle(struct gru_tlb_global_handle *tgh)
579 {
580 	__lock_handle(tgh);
581 }
582 
unlock_tgh_handle(struct gru_tlb_global_handle * tgh)583 static inline void unlock_tgh_handle(struct gru_tlb_global_handle *tgh)
584 {
585 	__unlock_handle(tgh);
586 }
587 
is_kernel_context(struct gru_thread_state * gts)588 static inline int is_kernel_context(struct gru_thread_state *gts)
589 {
590 	return !gts->ts_mm;
591 }
592 
593 /*
594  * The following are for Nehelem-EX. A more general scheme is needed for
595  * future processors.
596  */
597 #define UV_MAX_INT_CORES		8
598 #define uv_cpu_socket_number(p)		((cpu_physical_id(p) >> 5) & 1)
599 #define uv_cpu_ht_number(p)		(cpu_physical_id(p) & 1)
600 #define uv_cpu_core_number(p)		(((cpu_physical_id(p) >> 2) & 4) |	\
601 					((cpu_physical_id(p) >> 1) & 3))
602 /*-----------------------------------------------------------------------------
603  * Function prototypes & externs
604  */
605 struct gru_unload_context_req;
606 
607 extern const struct vm_operations_struct gru_vm_ops;
608 extern struct device *grudev;
609 
610 extern struct gru_vma_data *gru_alloc_vma_data(struct vm_area_struct *vma,
611 				int tsid);
612 extern struct gru_thread_state *gru_find_thread_state(struct vm_area_struct
613 				*vma, int tsid);
614 extern struct gru_thread_state *gru_alloc_thread_state(struct vm_area_struct
615 				*vma, int tsid);
616 extern struct gru_state *gru_assign_gru_context(struct gru_thread_state *gts);
617 extern void gru_load_context(struct gru_thread_state *gts);
618 extern void gru_steal_context(struct gru_thread_state *gts);
619 extern void gru_unload_context(struct gru_thread_state *gts, int savestate);
620 extern int gru_update_cch(struct gru_thread_state *gts);
621 extern void gts_drop(struct gru_thread_state *gts);
622 extern void gru_tgh_flush_init(struct gru_state *gru);
623 extern int gru_kservices_init(void);
624 extern void gru_kservices_exit(void);
625 extern irqreturn_t gru0_intr(int irq, void *dev_id);
626 extern irqreturn_t gru1_intr(int irq, void *dev_id);
627 extern irqreturn_t gru_intr_mblade(int irq, void *dev_id);
628 extern int gru_dump_chiplet_request(unsigned long arg);
629 extern long gru_get_gseg_statistics(unsigned long arg);
630 extern int gru_handle_user_call_os(unsigned long address);
631 extern int gru_user_flush_tlb(unsigned long arg);
632 extern int gru_user_unload_context(unsigned long arg);
633 extern int gru_get_exception_detail(unsigned long arg);
634 extern int gru_set_context_option(unsigned long address);
635 extern int gru_check_context_placement(struct gru_thread_state *gts);
636 extern int gru_cpu_fault_map_id(void);
637 extern struct vm_area_struct *gru_find_vma(unsigned long vaddr);
638 extern void gru_flush_all_tlb(struct gru_state *gru);
639 extern int gru_proc_init(void);
640 extern void gru_proc_exit(void);
641 
642 extern struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma,
643 		int cbr_au_count, int dsr_au_count,
644 		unsigned char tlb_preload_count, int options, int tsid);
645 extern unsigned long gru_reserve_cb_resources(struct gru_state *gru,
646 		int cbr_au_count, signed char *cbmap);
647 extern unsigned long gru_reserve_ds_resources(struct gru_state *gru,
648 		int dsr_au_count, signed char *dsmap);
649 extern vm_fault_t gru_fault(struct vm_fault *vmf);
650 extern struct gru_mm_struct *gru_register_mmu_notifier(void);
651 extern void gru_drop_mmu_notifier(struct gru_mm_struct *gms);
652 
653 extern int gru_ktest(unsigned long arg);
654 extern void gru_flush_tlb_range(struct gru_mm_struct *gms, unsigned long start,
655 					unsigned long len);
656 
657 extern unsigned long gru_options;
658 
659 #endif /* __GRUTABLES_H__ */
660