11a59d1b8SThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-or-later */
213d19498SJack Steiner /*
313d19498SJack Steiner * SN Platform GRU Driver
413d19498SJack Steiner *
513d19498SJack Steiner * GRU DRIVER TABLES, MACROS, externs, etc
613d19498SJack Steiner *
713d19498SJack Steiner * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
813d19498SJack Steiner */
913d19498SJack Steiner
1013d19498SJack Steiner #ifndef __GRUTABLES_H__
1113d19498SJack Steiner #define __GRUTABLES_H__
1213d19498SJack Steiner
1313d19498SJack Steiner /*
149ca8e40cSJack Steiner * GRU Chiplet:
159ca8e40cSJack Steiner * The GRU is a user addressible memory accelerator. It provides
169ca8e40cSJack Steiner * several forms of load, store, memset, bcopy instructions. In addition, it
179ca8e40cSJack Steiner * contains special instructions for AMOs, sending messages to message
189ca8e40cSJack Steiner * queues, etc.
199ca8e40cSJack Steiner *
209ca8e40cSJack Steiner * The GRU is an integral part of the node controller. It connects
219ca8e40cSJack Steiner * directly to the cpu socket. In its current implementation, there are 2
229ca8e40cSJack Steiner * GRU chiplets in the node controller on each blade (~node).
239ca8e40cSJack Steiner *
249ca8e40cSJack Steiner * The entire GRU memory space is fully coherent and cacheable by the cpus.
259ca8e40cSJack Steiner *
269ca8e40cSJack Steiner * Each GRU chiplet has a physical memory map that looks like the following:
279ca8e40cSJack Steiner *
289ca8e40cSJack Steiner * +-----------------+
299ca8e40cSJack Steiner * |/////////////////|
309ca8e40cSJack Steiner * |/////////////////|
319ca8e40cSJack Steiner * |/////////////////|
329ca8e40cSJack Steiner * |/////////////////|
339ca8e40cSJack Steiner * |/////////////////|
349ca8e40cSJack Steiner * |/////////////////|
359ca8e40cSJack Steiner * |/////////////////|
369ca8e40cSJack Steiner * |/////////////////|
379ca8e40cSJack Steiner * +-----------------+
389ca8e40cSJack Steiner * | system control |
399ca8e40cSJack Steiner * +-----------------+ _______ +-------------+
409ca8e40cSJack Steiner * |/////////////////| / | |
419ca8e40cSJack Steiner * |/////////////////| / | |
429ca8e40cSJack Steiner * |/////////////////| / | instructions|
439ca8e40cSJack Steiner * |/////////////////| / | |
449ca8e40cSJack Steiner * |/////////////////| / | |
459ca8e40cSJack Steiner * |/////////////////| / |-------------|
469ca8e40cSJack Steiner * |/////////////////| / | |
479ca8e40cSJack Steiner * +-----------------+ | |
489ca8e40cSJack Steiner * | context 15 | | data |
499ca8e40cSJack Steiner * +-----------------+ | |
509ca8e40cSJack Steiner * | ...... | \ | |
519ca8e40cSJack Steiner * +-----------------+ \____________ +-------------+
529ca8e40cSJack Steiner * | context 1 |
539ca8e40cSJack Steiner * +-----------------+
549ca8e40cSJack Steiner * | context 0 |
559ca8e40cSJack Steiner * +-----------------+
569ca8e40cSJack Steiner *
579ca8e40cSJack Steiner * Each of the "contexts" is a chunk of memory that can be mmaped into user
589ca8e40cSJack Steiner * space. The context consists of 2 parts:
599ca8e40cSJack Steiner *
609ca8e40cSJack Steiner * - an instruction space that can be directly accessed by the user
619ca8e40cSJack Steiner * to issue GRU instructions and to check instruction status.
629ca8e40cSJack Steiner *
639ca8e40cSJack Steiner * - a data area that acts as normal RAM.
649ca8e40cSJack Steiner *
659ca8e40cSJack Steiner * User instructions contain virtual addresses of data to be accessed by the
669ca8e40cSJack Steiner * GRU. The GRU contains a TLB that is used to convert these user virtual
679ca8e40cSJack Steiner * addresses to physical addresses.
689ca8e40cSJack Steiner *
699ca8e40cSJack Steiner * The "system control" area of the GRU chiplet is used by the kernel driver
709ca8e40cSJack Steiner * to manage user contexts and to perform functions such as TLB dropin and
719ca8e40cSJack Steiner * purging.
729ca8e40cSJack Steiner *
739ca8e40cSJack Steiner * One context may be reserved for the kernel and used for cross-partition
749ca8e40cSJack Steiner * communication. The GRU will also be used to asynchronously zero out
759ca8e40cSJack Steiner * large blocks of memory (not currently implemented).
769ca8e40cSJack Steiner *
779ca8e40cSJack Steiner *
7813d19498SJack Steiner * Tables:
7913d19498SJack Steiner *
8013d19498SJack Steiner * VDATA-VMA Data - Holds a few parameters. Head of linked list of
8113d19498SJack Steiner * GTS tables for threads using the GSEG
8213d19498SJack Steiner * GTS - Gru Thread State - contains info for managing a GSEG context. A
8313d19498SJack Steiner * GTS is allocated for each thread accessing a
8413d19498SJack Steiner * GSEG.
8513d19498SJack Steiner * GTD - GRU Thread Data - contains shadow copy of GRU data when GSEG is
8613d19498SJack Steiner * not loaded into a GRU
8713d19498SJack Steiner * GMS - GRU Memory Struct - Used to manage TLB shootdowns. Tracks GRUs
8813d19498SJack Steiner * where a GSEG has been loaded. Similar to
8913d19498SJack Steiner * an mm_struct but for GRU.
9013d19498SJack Steiner *
9113d19498SJack Steiner * GS - GRU State - Used to manage the state of a GRU chiplet
9213d19498SJack Steiner * BS - Blade State - Used to manage state of all GRU chiplets
9313d19498SJack Steiner * on a blade
9413d19498SJack Steiner *
9513d19498SJack Steiner *
9613d19498SJack Steiner * Normal task tables for task using GRU.
9713d19498SJack Steiner * - 2 threads in process
9813d19498SJack Steiner * - 2 GSEGs open in process
9913d19498SJack Steiner * - GSEG1 is being used by both threads
10013d19498SJack Steiner * - GSEG2 is used only by thread 2
10113d19498SJack Steiner *
10213d19498SJack Steiner * task -->|
10313d19498SJack Steiner * task ---+---> mm ->------ (notifier) -------+-> gms
10413d19498SJack Steiner * | |
10513d19498SJack Steiner * |--> vma -> vdata ---> gts--->| GSEG1 (thread1)
10613d19498SJack Steiner * | | |
10713d19498SJack Steiner * | +-> gts--->| GSEG1 (thread2)
10813d19498SJack Steiner * | |
10913d19498SJack Steiner * |--> vma -> vdata ---> gts--->| GSEG2 (thread2)
11013d19498SJack Steiner * .
11113d19498SJack Steiner * .
11213d19498SJack Steiner *
11313d19498SJack Steiner * GSEGs are marked DONTCOPY on fork
11413d19498SJack Steiner *
11513d19498SJack Steiner * At open
11613d19498SJack Steiner * file.private_data -> NULL
11713d19498SJack Steiner *
11813d19498SJack Steiner * At mmap,
11913d19498SJack Steiner * vma -> vdata
12013d19498SJack Steiner *
12113d19498SJack Steiner * After gseg reference
12213d19498SJack Steiner * vma -> vdata ->gts
12313d19498SJack Steiner *
12413d19498SJack Steiner * After fork
12513d19498SJack Steiner * parent
12613d19498SJack Steiner * vma -> vdata -> gts
12713d19498SJack Steiner * child
12813d19498SJack Steiner * (vma is not copied)
12913d19498SJack Steiner *
13013d19498SJack Steiner */
13113d19498SJack Steiner
13203acb0c5SXiyu Yang #include <linux/refcount.h>
13313d19498SJack Steiner #include <linux/rmap.h>
13413d19498SJack Steiner #include <linux/interrupt.h>
13513d19498SJack Steiner #include <linux/mutex.h>
13613d19498SJack Steiner #include <linux/wait.h>
13713d19498SJack Steiner #include <linux/mmu_notifier.h>
1381770a80fSSouptick Joarder #include <linux/mm_types.h>
13913d19498SJack Steiner #include "gru.h"
1407e796a72SJack Steiner #include "grulib.h"
14113d19498SJack Steiner #include "gruhandles.h"
14213d19498SJack Steiner
14313d19498SJack Steiner extern struct gru_stats_s gru_stats;
14413d19498SJack Steiner extern struct gru_blade_state *gru_base[];
14513d19498SJack Steiner extern unsigned long gru_start_paddr, gru_end_paddr;
1461a2c09e3SJack Steiner extern void *gru_start_vaddr;
147e1c3219dSJack Steiner extern unsigned int gru_max_gids;
14813d19498SJack Steiner
14913d19498SJack Steiner #define GRU_MAX_BLADES MAX_NUMNODES
15013d19498SJack Steiner #define GRU_MAX_GRUS (GRU_MAX_BLADES * GRU_CHIPLETS_PER_BLADE)
15113d19498SJack Steiner
15213d19498SJack Steiner #define GRU_DRIVER_ID_STR "SGI GRU Device Driver"
153e5ae6e82SJack Steiner #define GRU_DRIVER_VERSION_STR "0.85"
15413d19498SJack Steiner
15513d19498SJack Steiner /*
15613d19498SJack Steiner * GRU statistics.
15713d19498SJack Steiner */
15813d19498SJack Steiner struct gru_stats_s {
15913d19498SJack Steiner atomic_long_t vdata_alloc;
16013d19498SJack Steiner atomic_long_t vdata_free;
16113d19498SJack Steiner atomic_long_t gts_alloc;
16213d19498SJack Steiner atomic_long_t gts_free;
163563447d7SJack Steiner atomic_long_t gms_alloc;
164563447d7SJack Steiner atomic_long_t gms_free;
16513d19498SJack Steiner atomic_long_t gts_double_allocate;
16613d19498SJack Steiner atomic_long_t assign_context;
16713d19498SJack Steiner atomic_long_t assign_context_failed;
16813d19498SJack Steiner atomic_long_t free_context;
169836ce679SJack Steiner atomic_long_t load_user_context;
170836ce679SJack Steiner atomic_long_t load_kernel_context;
171836ce679SJack Steiner atomic_long_t lock_kernel_context;
172836ce679SJack Steiner atomic_long_t unlock_kernel_context;
173836ce679SJack Steiner atomic_long_t steal_user_context;
174836ce679SJack Steiner atomic_long_t steal_kernel_context;
17513d19498SJack Steiner atomic_long_t steal_context_failed;
17613d19498SJack Steiner atomic_long_t nopfn;
17713d19498SJack Steiner atomic_long_t asid_new;
17813d19498SJack Steiner atomic_long_t asid_next;
17913d19498SJack Steiner atomic_long_t asid_wrap;
18013d19498SJack Steiner atomic_long_t asid_reuse;
18113d19498SJack Steiner atomic_long_t intr;
182563447d7SJack Steiner atomic_long_t intr_cbr;
183563447d7SJack Steiner atomic_long_t intr_tfh;
1842ce4d4c9SJack Steiner atomic_long_t intr_spurious;
18543884604SJack Steiner atomic_long_t intr_mm_lock_failed;
18613d19498SJack Steiner atomic_long_t call_os;
18713d19498SJack Steiner atomic_long_t call_os_wait_queue;
18813d19498SJack Steiner atomic_long_t user_flush_tlb;
18913d19498SJack Steiner atomic_long_t user_unload_context;
19013d19498SJack Steiner atomic_long_t user_exception;
19192b39388SJack Steiner atomic_long_t set_context_option;
19255484c45SJack Steiner atomic_long_t check_context_retarget_intr;
19355484c45SJack Steiner atomic_long_t check_context_unload;
19413d19498SJack Steiner atomic_long_t tlb_dropin;
195c550222fSJack Steiner atomic_long_t tlb_preload_page;
19613d19498SJack Steiner atomic_long_t tlb_dropin_fail_no_asid;
19713d19498SJack Steiner atomic_long_t tlb_dropin_fail_upm;
19813d19498SJack Steiner atomic_long_t tlb_dropin_fail_invalid;
19913d19498SJack Steiner atomic_long_t tlb_dropin_fail_range_active;
20013d19498SJack Steiner atomic_long_t tlb_dropin_fail_idle;
20113d19498SJack Steiner atomic_long_t tlb_dropin_fail_fmm;
202cd1334f0SJack Steiner atomic_long_t tlb_dropin_fail_no_exception;
203270952a9SJack Steiner atomic_long_t tfh_stale_on_fault;
20413d19498SJack Steiner atomic_long_t mmu_invalidate_range;
20513d19498SJack Steiner atomic_long_t mmu_invalidate_page;
20613d19498SJack Steiner atomic_long_t flush_tlb;
20713d19498SJack Steiner atomic_long_t flush_tlb_gru;
20813d19498SJack Steiner atomic_long_t flush_tlb_gru_tgh;
20913d19498SJack Steiner atomic_long_t flush_tlb_gru_zero_asid;
21013d19498SJack Steiner
21113d19498SJack Steiner atomic_long_t copy_gpa;
212289750d1SRobin Holt atomic_long_t read_gpa;
21313d19498SJack Steiner
21413d19498SJack Steiner atomic_long_t mesq_receive;
21513d19498SJack Steiner atomic_long_t mesq_receive_none;
21613d19498SJack Steiner atomic_long_t mesq_send;
21713d19498SJack Steiner atomic_long_t mesq_send_failed;
21813d19498SJack Steiner atomic_long_t mesq_noop;
21913d19498SJack Steiner atomic_long_t mesq_send_unexpected_error;
22013d19498SJack Steiner atomic_long_t mesq_send_lb_overflow;
22113d19498SJack Steiner atomic_long_t mesq_send_qlimit_reached;
22213d19498SJack Steiner atomic_long_t mesq_send_amo_nacked;
22313d19498SJack Steiner atomic_long_t mesq_send_put_nacked;
224563447d7SJack Steiner atomic_long_t mesq_page_overflow;
22513d19498SJack Steiner atomic_long_t mesq_qf_locked;
22613d19498SJack Steiner atomic_long_t mesq_qf_noop_not_full;
22713d19498SJack Steiner atomic_long_t mesq_qf_switch_head_failed;
22813d19498SJack Steiner atomic_long_t mesq_qf_unexpected_error;
22913d19498SJack Steiner atomic_long_t mesq_noop_unexpected_error;
23013d19498SJack Steiner atomic_long_t mesq_noop_lb_overflow;
23113d19498SJack Steiner atomic_long_t mesq_noop_qlimit_reached;
23213d19498SJack Steiner atomic_long_t mesq_noop_amo_nacked;
23313d19498SJack Steiner atomic_long_t mesq_noop_put_nacked;
234563447d7SJack Steiner atomic_long_t mesq_noop_page_overflow;
23513d19498SJack Steiner
23613d19498SJack Steiner };
23713d19498SJack Steiner
238a24e5e1cSJack Steiner enum mcs_op {cchop_allocate, cchop_start, cchop_interrupt, cchop_interrupt_sync,
239c550222fSJack Steiner cchop_deallocate, tfhop_write_only, tfhop_write_restart,
240c550222fSJack Steiner tghop_invalidate, mcsop_last};
241a24e5e1cSJack Steiner
242e56484daSJack Steiner struct mcs_op_statistic {
243e56484daSJack Steiner atomic_long_t count;
244e56484daSJack Steiner atomic_long_t total;
245e56484daSJack Steiner unsigned long max;
246e56484daSJack Steiner };
247e56484daSJack Steiner
248e56484daSJack Steiner extern struct mcs_op_statistic mcs_op_statistics[mcsop_last];
249e56484daSJack Steiner
25013d19498SJack Steiner #define OPT_DPRINT 1
25113d19498SJack Steiner #define OPT_STATS 2
25213d19498SJack Steiner
25313d19498SJack Steiner
25413d19498SJack Steiner #define IRQ_GRU 110 /* Starting IRQ number for interrupts */
25513d19498SJack Steiner
25613d19498SJack Steiner /* Delay in jiffies between attempts to assign a GRU context */
25713d19498SJack Steiner #define GRU_ASSIGN_DELAY ((HZ * 20) / 1000)
25813d19498SJack Steiner
25913d19498SJack Steiner /*
26013d19498SJack Steiner * If a process has it's context stolen, min delay in jiffies before trying to
26113d19498SJack Steiner * steal a context from another process.
26213d19498SJack Steiner */
26313d19498SJack Steiner #define GRU_STEAL_DELAY ((HZ * 200) / 1000)
26413d19498SJack Steiner
26513d19498SJack Steiner #define STAT(id) do { \
2669ca8e40cSJack Steiner if (gru_options & OPT_STATS) \
26713d19498SJack Steiner atomic_long_inc(&gru_stats.id); \
26813d19498SJack Steiner } while (0)
26913d19498SJack Steiner
27013d19498SJack Steiner #ifdef CONFIG_SGI_GRU_DEBUG
27113d19498SJack Steiner #define gru_dbg(dev, fmt, x...) \
27213d19498SJack Steiner do { \
2739ca8e40cSJack Steiner if (gru_options & OPT_DPRINT) \
274563447d7SJack Steiner printk(KERN_DEBUG "GRU:%d %s: " fmt, smp_processor_id(), __func__, x);\
27513d19498SJack Steiner } while (0)
27613d19498SJack Steiner #else
27713d19498SJack Steiner #define gru_dbg(x...)
27813d19498SJack Steiner #endif
27913d19498SJack Steiner
28013d19498SJack Steiner /*-----------------------------------------------------------------------------
28113d19498SJack Steiner * ASID management
28213d19498SJack Steiner */
28313d19498SJack Steiner #define MAX_ASID 0xfffff0
28413d19498SJack Steiner #define MIN_ASID 8
28513d19498SJack Steiner #define ASID_INC 8 /* number of regions */
28613d19498SJack Steiner
28713d19498SJack Steiner /* Generate a GRU asid value from a GRU base asid & a virtual address. */
28813d19498SJack Steiner #define VADDR_HI_BIT 64
289fe5bb6b0SJack Steiner #define GRUREGION(addr) ((addr) >> (VADDR_HI_BIT - 3) & 3)
29013d19498SJack Steiner #define GRUASID(asid, addr) ((asid) + GRUREGION(addr))
29113d19498SJack Steiner
29213d19498SJack Steiner /*------------------------------------------------------------------------------
29313d19498SJack Steiner * File & VMS Tables
29413d19498SJack Steiner */
29513d19498SJack Steiner
29613d19498SJack Steiner struct gru_state;
29713d19498SJack Steiner
29813d19498SJack Steiner /*
29913d19498SJack Steiner * This structure is pointed to from the mmstruct via the notifier pointer.
30013d19498SJack Steiner * There is one of these per address space.
30113d19498SJack Steiner */
302fe5bb6b0SJack Steiner struct gru_mm_tracker { /* pack to reduce size */
303fe5bb6b0SJack Steiner unsigned int mt_asid_gen:24; /* ASID wrap count */
304fe5bb6b0SJack Steiner unsigned int mt_asid:24; /* current base ASID for gru */
305fe5bb6b0SJack Steiner unsigned short mt_ctxbitmap:16;/* bitmap of contexts using
30613d19498SJack Steiner asid */
307fe5bb6b0SJack Steiner } __attribute__ ((packed));
30813d19498SJack Steiner
30913d19498SJack Steiner struct gru_mm_struct {
31013d19498SJack Steiner struct mmu_notifier ms_notifier;
31113d19498SJack Steiner spinlock_t ms_asid_lock; /* protects ASID assignment */
31213d19498SJack Steiner atomic_t ms_range_active;/* num range_invals active */
31313d19498SJack Steiner wait_queue_head_t ms_wait_queue;
31413d19498SJack Steiner DECLARE_BITMAP(ms_asidmap, GRU_MAX_GRUS);
31513d19498SJack Steiner struct gru_mm_tracker ms_asids[GRU_MAX_GRUS];
31613d19498SJack Steiner };
31713d19498SJack Steiner
31813d19498SJack Steiner /*
31913d19498SJack Steiner * One of these structures is allocated when a GSEG is mmaped. The
32013d19498SJack Steiner * structure is pointed to by the vma->vm_private_data field in the vma struct.
32113d19498SJack Steiner */
32213d19498SJack Steiner struct gru_vma_data {
32313d19498SJack Steiner spinlock_t vd_lock; /* Serialize access to vma */
32413d19498SJack Steiner struct list_head vd_head; /* head of linked list of gts */
32513d19498SJack Steiner long vd_user_options;/* misc user option flags */
32613d19498SJack Steiner int vd_cbr_au_count;
32713d19498SJack Steiner int vd_dsr_au_count;
328c550222fSJack Steiner unsigned char vd_tlb_preload_count;
32913d19498SJack Steiner };
33013d19498SJack Steiner
33113d19498SJack Steiner /*
33213d19498SJack Steiner * One of these is allocated for each thread accessing a mmaped GRU. A linked
33313d19498SJack Steiner * list of these structure is hung off the struct gru_vma_data in the mm_struct.
33413d19498SJack Steiner */
33513d19498SJack Steiner struct gru_thread_state {
33613d19498SJack Steiner struct list_head ts_next; /* list - head at vma-private */
33713d19498SJack Steiner struct mutex ts_ctxlock; /* load/unload CTX lock */
33813d19498SJack Steiner struct mm_struct *ts_mm; /* mm currently mapped to
33913d19498SJack Steiner context */
34013d19498SJack Steiner struct vm_area_struct *ts_vma; /* vma of GRU context */
34113d19498SJack Steiner struct gru_state *ts_gru; /* GRU where the context is
34213d19498SJack Steiner loaded */
34313d19498SJack Steiner struct gru_mm_struct *ts_gms; /* asid & ioproc struct */
344c550222fSJack Steiner unsigned char ts_tlb_preload_count; /* TLB preload pages */
34513d19498SJack Steiner unsigned long ts_cbr_map; /* map of allocated CBRs */
34613d19498SJack Steiner unsigned long ts_dsr_map; /* map of allocated DATA
34713d19498SJack Steiner resources */
34813d19498SJack Steiner unsigned long ts_steal_jiffies;/* jiffies when context last
34913d19498SJack Steiner stolen */
35013d19498SJack Steiner long ts_user_options;/* misc user option flags */
35113d19498SJack Steiner pid_t ts_tgid_owner; /* task that is using the
35213d19498SJack Steiner context - for migration */
353518e5cd4SJack Steiner short ts_user_blade_id;/* user selected blade */
35467704738SJason A. Donenfeld signed char ts_user_chiplet_id;/* user selected chiplet */
3557b8274e9SJack Steiner unsigned short ts_sizeavail; /* Pagesizes in use */
35613d19498SJack Steiner int ts_tsid; /* thread that owns the
35713d19498SJack Steiner structure */
35813d19498SJack Steiner int ts_tlb_int_select;/* target cpu if interrupts
35913d19498SJack Steiner enabled */
36013d19498SJack Steiner int ts_ctxnum; /* context number where the
36113d19498SJack Steiner context is loaded */
36203acb0c5SXiyu Yang refcount_t ts_refcnt; /* reference count GTS */
36313d19498SJack Steiner unsigned char ts_dsr_au_count;/* Number of DSR resources
36413d19498SJack Steiner required for contest */
36513d19498SJack Steiner unsigned char ts_cbr_au_count;/* Number of CBR resources
36613d19498SJack Steiner required for contest */
36767704738SJason A. Donenfeld signed char ts_cch_req_slice;/* CCH packet slice */
36867704738SJason A. Donenfeld signed char ts_blade; /* If >= 0, migrate context if
36925985edcSLucas De Marchi ref from different blade */
37067704738SJason A. Donenfeld signed char ts_force_cch_reload;
37167704738SJason A. Donenfeld signed char ts_cbr_idx[GRU_CBR_AU];/* CBR numbers of each
37213d19498SJack Steiner allocated CB */
373940229b9SJack Steiner int ts_data_valid; /* Indicates if ts_gdata has
374940229b9SJack Steiner valid data */
3755958ab88SJack Steiner struct gru_gseg_statistics ustats; /* User statistics */
376f490e8aeSGustavo A. R. Silva unsigned long ts_gdata[]; /* save area for GRU data (CB,
37713d19498SJack Steiner DS, CBE) */
37813d19498SJack Steiner };
37913d19498SJack Steiner
38013d19498SJack Steiner /*
38113d19498SJack Steiner * Threaded programs actually allocate an array of GSEGs when a context is
38213d19498SJack Steiner * created. Each thread uses a separate GSEG. TSID is the index into the GSEG
38313d19498SJack Steiner * array.
38413d19498SJack Steiner */
38513d19498SJack Steiner #define TSID(a, v) (((a) - (v)->vm_start) / GRU_GSEG_PAGESIZE)
38613d19498SJack Steiner #define UGRUADDR(gts) ((gts)->ts_vma->vm_start + \
38713d19498SJack Steiner (gts)->ts_tsid * GRU_GSEG_PAGESIZE)
38813d19498SJack Steiner
38913d19498SJack Steiner #define NULLCTX (-1) /* if context not loaded into GRU */
39013d19498SJack Steiner
39113d19498SJack Steiner /*-----------------------------------------------------------------------------
39213d19498SJack Steiner * GRU State Tables
39313d19498SJack Steiner */
39413d19498SJack Steiner
39513d19498SJack Steiner /*
39613d19498SJack Steiner * One of these exists for each GRU chiplet.
39713d19498SJack Steiner */
39813d19498SJack Steiner struct gru_state {
39913d19498SJack Steiner struct gru_blade_state *gs_blade; /* GRU state for entire
40013d19498SJack Steiner blade */
40113d19498SJack Steiner unsigned long gs_gru_base_paddr; /* Physical address of
40213d19498SJack Steiner gru segments (64) */
40313d19498SJack Steiner void *gs_gru_base_vaddr; /* Virtual address of
40413d19498SJack Steiner gru segments (64) */
405e1c3219dSJack Steiner unsigned short gs_gid; /* unique GRU number */
406e1c3219dSJack Steiner unsigned short gs_blade_id; /* blade of GRU */
40755484c45SJack Steiner unsigned char gs_chiplet_id; /* blade chiplet of GRU */
40813d19498SJack Steiner unsigned char gs_tgh_local_shift; /* used to pick TGH for
40913d19498SJack Steiner local flush */
41013d19498SJack Steiner unsigned char gs_tgh_first_remote; /* starting TGH# for
41113d19498SJack Steiner remote flush */
41213d19498SJack Steiner spinlock_t gs_asid_lock; /* lock used for
41313d19498SJack Steiner assigning asids */
41413d19498SJack Steiner spinlock_t gs_lock; /* lock used for
41513d19498SJack Steiner assigning contexts */
41613d19498SJack Steiner
41713d19498SJack Steiner /* -- the following are protected by the gs_asid_lock spinlock ---- */
41813d19498SJack Steiner unsigned int gs_asid; /* Next availe ASID */
41913d19498SJack Steiner unsigned int gs_asid_limit; /* Limit of available
42013d19498SJack Steiner ASIDs */
42113d19498SJack Steiner unsigned int gs_asid_gen; /* asid generation.
42213d19498SJack Steiner Inc on wrap */
42313d19498SJack Steiner
42413d19498SJack Steiner /* --- the following fields are protected by the gs_lock spinlock --- */
42513d19498SJack Steiner unsigned long gs_context_map; /* bitmap to manage
42613d19498SJack Steiner contexts in use */
42713d19498SJack Steiner unsigned long gs_cbr_map; /* bitmap to manage CB
42813d19498SJack Steiner resources */
42913d19498SJack Steiner unsigned long gs_dsr_map; /* bitmap used to manage
43013d19498SJack Steiner DATA resources */
43113d19498SJack Steiner unsigned int gs_reserved_cbrs; /* Number of kernel-
43213d19498SJack Steiner reserved cbrs */
43313d19498SJack Steiner unsigned int gs_reserved_dsr_bytes; /* Bytes of kernel-
43413d19498SJack Steiner reserved dsrs */
43513d19498SJack Steiner unsigned short gs_active_contexts; /* number of contexts
43613d19498SJack Steiner in use */
43713d19498SJack Steiner struct gru_thread_state *gs_gts[GRU_NUM_CCH]; /* GTS currently using
43813d19498SJack Steiner the context */
4394107e1d3SJack Steiner int gs_irq[GRU_NUM_TFM]; /* Interrupt irqs */
44013d19498SJack Steiner };
44113d19498SJack Steiner
44213d19498SJack Steiner /*
44313d19498SJack Steiner * This structure contains the GRU state for all the GRUs on a blade.
44413d19498SJack Steiner */
44513d19498SJack Steiner struct gru_blade_state {
44613d19498SJack Steiner void *kernel_cb; /* First kernel
44713d19498SJack Steiner reserved cb */
44813d19498SJack Steiner void *kernel_dsr; /* First kernel
44913d19498SJack Steiner reserved DSR */
450836ce679SJack Steiner struct rw_semaphore bs_kgts_sema; /* lock for kgts */
451836ce679SJack Steiner struct gru_thread_state *bs_kgts; /* GTS for kernel use */
452836ce679SJack Steiner
4534a7a17c1SJack Steiner /* ---- the following are used for managing kernel async GRU CBRs --- */
4544a7a17c1SJack Steiner int bs_async_dsr_bytes; /* DSRs for async */
4554a7a17c1SJack Steiner int bs_async_cbrs; /* CBRs AU for async */
4564a7a17c1SJack Steiner struct completion *bs_async_wq;
4574a7a17c1SJack Steiner
45813d19498SJack Steiner /* ---- the following are protected by the bs_lock spinlock ---- */
45913d19498SJack Steiner spinlock_t bs_lock; /* lock used for
46013d19498SJack Steiner stealing contexts */
46113d19498SJack Steiner int bs_lru_ctxnum; /* STEAL - last context
46213d19498SJack Steiner stolen */
46313d19498SJack Steiner struct gru_state *bs_lru_gru; /* STEAL - last gru
46413d19498SJack Steiner stolen */
46513d19498SJack Steiner
46613d19498SJack Steiner struct gru_state bs_grus[GRU_CHIPLETS_PER_BLADE];
46713d19498SJack Steiner };
46813d19498SJack Steiner
46913d19498SJack Steiner /*-----------------------------------------------------------------------------
47013d19498SJack Steiner * Address Primitives
47113d19498SJack Steiner */
47213d19498SJack Steiner #define get_tfm_for_cpu(g, c) \
47313d19498SJack Steiner ((struct gru_tlb_fault_map *)get_tfm((g)->gs_gru_base_vaddr, (c)))
47413d19498SJack Steiner #define get_tfh_by_index(g, i) \
47513d19498SJack Steiner ((struct gru_tlb_fault_handle *)get_tfh((g)->gs_gru_base_vaddr, (i)))
47613d19498SJack Steiner #define get_tgh_by_index(g, i) \
47713d19498SJack Steiner ((struct gru_tlb_global_handle *)get_tgh((g)->gs_gru_base_vaddr, (i)))
47813d19498SJack Steiner #define get_cbe_by_index(g, i) \
47913d19498SJack Steiner ((struct gru_control_block_extended *)get_cbe((g)->gs_gru_base_vaddr,\
48013d19498SJack Steiner (i)))
48113d19498SJack Steiner
48213d19498SJack Steiner /*-----------------------------------------------------------------------------
48313d19498SJack Steiner * Useful Macros
48413d19498SJack Steiner */
48513d19498SJack Steiner
48613d19498SJack Steiner /* Given a blade# & chiplet#, get a pointer to the GRU */
48713d19498SJack Steiner #define get_gru(b, c) (&gru_base[b]->bs_grus[c])
48813d19498SJack Steiner
48913d19498SJack Steiner /* Number of bytes to save/restore when unloading/loading GRU contexts */
49013d19498SJack Steiner #define DSR_BYTES(dsr) ((dsr) * GRU_DSR_AU_BYTES)
49113d19498SJack Steiner #define CBR_BYTES(cbr) ((cbr) * GRU_HANDLE_BYTES * GRU_CBR_AU_SIZE * 2)
49213d19498SJack Steiner
49313d19498SJack Steiner /* Convert a user CB number to the actual CBRNUM */
49413d19498SJack Steiner #define thread_cbr_number(gts, n) ((gts)->ts_cbr_idx[(n) / GRU_CBR_AU_SIZE] \
49513d19498SJack Steiner * GRU_CBR_AU_SIZE + (n) % GRU_CBR_AU_SIZE)
49613d19498SJack Steiner
49713d19498SJack Steiner /* Convert a gid to a pointer to the GRU */
49813d19498SJack Steiner #define GID_TO_GRU(gid) \
49913d19498SJack Steiner (gru_base[(gid) / GRU_CHIPLETS_PER_BLADE] ? \
50013d19498SJack Steiner (&gru_base[(gid) / GRU_CHIPLETS_PER_BLADE]-> \
50113d19498SJack Steiner bs_grus[(gid) % GRU_CHIPLETS_PER_BLADE]) : \
50213d19498SJack Steiner NULL)
50313d19498SJack Steiner
50413d19498SJack Steiner /* Scan all active GRUs in a GRU bitmap */
50513d19498SJack Steiner #define for_each_gru_in_bitmap(gid, map) \
5068c1840f1SAkinobu Mita for_each_set_bit((gid), (map), GRU_MAX_GRUS)
50713d19498SJack Steiner
50813d19498SJack Steiner /* Scan all active GRUs on a specific blade */
50913d19498SJack Steiner #define for_each_gru_on_blade(gru, nid, i) \
51013d19498SJack Steiner for ((gru) = gru_base[nid]->bs_grus, (i) = 0; \
51113d19498SJack Steiner (i) < GRU_CHIPLETS_PER_BLADE; \
51213d19498SJack Steiner (i)++, (gru)++)
51313d19498SJack Steiner
514e1c3219dSJack Steiner /* Scan all GRUs */
515e1c3219dSJack Steiner #define foreach_gid(gid) \
516e1c3219dSJack Steiner for ((gid) = 0; (gid) < gru_max_gids; (gid)++)
517e1c3219dSJack Steiner
51813d19498SJack Steiner /* Scan all active GTSs on a gru. Note: must hold ss_lock to use this macro. */
51913d19498SJack Steiner #define for_each_gts_on_gru(gts, gru, ctxnum) \
52013d19498SJack Steiner for ((ctxnum) = 0; (ctxnum) < GRU_NUM_CCH; (ctxnum)++) \
52113d19498SJack Steiner if (((gts) = (gru)->gs_gts[ctxnum]))
52213d19498SJack Steiner
52313d19498SJack Steiner /* Scan each CBR whose bit is set in a TFM (or copy of) */
52413d19498SJack Steiner #define for_each_cbr_in_tfm(i, map) \
5258c1840f1SAkinobu Mita for_each_set_bit((i), (map), GRU_NUM_CBE)
52613d19498SJack Steiner
52713d19498SJack Steiner /* Scan each CBR in a CBR bitmap. Note: multiple CBRs in an allocation unit */
52813d19498SJack Steiner #define for_each_cbr_in_allocation_map(i, map, k) \
5298c1840f1SAkinobu Mita for_each_set_bit((k), (map), GRU_CBR_AU) \
53013d19498SJack Steiner for ((i) = (k)*GRU_CBR_AU_SIZE; \
53113d19498SJack Steiner (i) < ((k) + 1) * GRU_CBR_AU_SIZE; (i)++)
53213d19498SJack Steiner
53313d19498SJack Steiner #define gseg_physical_address(gru, ctxnum) \
53413d19498SJack Steiner ((gru)->gs_gru_base_paddr + ctxnum * GRU_GSEG_STRIDE)
53513d19498SJack Steiner #define gseg_virtual_address(gru, ctxnum) \
53613d19498SJack Steiner ((gru)->gs_gru_base_vaddr + ctxnum * GRU_GSEG_STRIDE)
53713d19498SJack Steiner
53813d19498SJack Steiner /*-----------------------------------------------------------------------------
53913d19498SJack Steiner * Lock / Unlock GRU handles
54013d19498SJack Steiner * Use the "delresp" bit in the handle as a "lock" bit.
54113d19498SJack Steiner */
54213d19498SJack Steiner
54313d19498SJack Steiner /* Lock hierarchy checking enabled only in emulator */
54413d19498SJack Steiner
5459cc9b056SJack Steiner /* 0 = lock failed, 1 = locked */
__trylock_handle(void * h)5469cc9b056SJack Steiner static inline int __trylock_handle(void *h)
5479cc9b056SJack Steiner {
5489cc9b056SJack Steiner return !test_and_set_bit(1, h);
5499cc9b056SJack Steiner }
5509cc9b056SJack Steiner
__lock_handle(void * h)55113d19498SJack Steiner static inline void __lock_handle(void *h)
55213d19498SJack Steiner {
55313d19498SJack Steiner while (test_and_set_bit(1, h))
55413d19498SJack Steiner cpu_relax();
55513d19498SJack Steiner }
55613d19498SJack Steiner
__unlock_handle(void * h)55713d19498SJack Steiner static inline void __unlock_handle(void *h)
55813d19498SJack Steiner {
55913d19498SJack Steiner clear_bit(1, h);
56013d19498SJack Steiner }
56113d19498SJack Steiner
trylock_cch_handle(struct gru_context_configuration_handle * cch)5629cc9b056SJack Steiner static inline int trylock_cch_handle(struct gru_context_configuration_handle *cch)
5639cc9b056SJack Steiner {
5649cc9b056SJack Steiner return __trylock_handle(cch);
5659cc9b056SJack Steiner }
5669cc9b056SJack Steiner
lock_cch_handle(struct gru_context_configuration_handle * cch)56713d19498SJack Steiner static inline void lock_cch_handle(struct gru_context_configuration_handle *cch)
56813d19498SJack Steiner {
56913d19498SJack Steiner __lock_handle(cch);
57013d19498SJack Steiner }
57113d19498SJack Steiner
unlock_cch_handle(struct gru_context_configuration_handle * cch)57213d19498SJack Steiner static inline void unlock_cch_handle(struct gru_context_configuration_handle
57313d19498SJack Steiner *cch)
57413d19498SJack Steiner {
57513d19498SJack Steiner __unlock_handle(cch);
57613d19498SJack Steiner }
57713d19498SJack Steiner
lock_tgh_handle(struct gru_tlb_global_handle * tgh)57813d19498SJack Steiner static inline void lock_tgh_handle(struct gru_tlb_global_handle *tgh)
57913d19498SJack Steiner {
58013d19498SJack Steiner __lock_handle(tgh);
58113d19498SJack Steiner }
58213d19498SJack Steiner
unlock_tgh_handle(struct gru_tlb_global_handle * tgh)58313d19498SJack Steiner static inline void unlock_tgh_handle(struct gru_tlb_global_handle *tgh)
58413d19498SJack Steiner {
58513d19498SJack Steiner __unlock_handle(tgh);
58613d19498SJack Steiner }
58713d19498SJack Steiner
is_kernel_context(struct gru_thread_state * gts)588836ce679SJack Steiner static inline int is_kernel_context(struct gru_thread_state *gts)
589836ce679SJack Steiner {
590836ce679SJack Steiner return !gts->ts_mm;
591836ce679SJack Steiner }
592836ce679SJack Steiner
5934107e1d3SJack Steiner /*
5944107e1d3SJack Steiner * The following are for Nehelem-EX. A more general scheme is needed for
5954107e1d3SJack Steiner * future processors.
5964107e1d3SJack Steiner */
5974107e1d3SJack Steiner #define UV_MAX_INT_CORES 8
5984107e1d3SJack Steiner #define uv_cpu_socket_number(p) ((cpu_physical_id(p) >> 5) & 1)
5994107e1d3SJack Steiner #define uv_cpu_ht_number(p) (cpu_physical_id(p) & 1)
6004107e1d3SJack Steiner #define uv_cpu_core_number(p) (((cpu_physical_id(p) >> 2) & 4) | \
6014107e1d3SJack Steiner ((cpu_physical_id(p) >> 1) & 3))
60213d19498SJack Steiner /*-----------------------------------------------------------------------------
60313d19498SJack Steiner * Function prototypes & externs
60413d19498SJack Steiner */
60513d19498SJack Steiner struct gru_unload_context_req;
60613d19498SJack Steiner
607f0f37e2fSAlexey Dobriyan extern const struct vm_operations_struct gru_vm_ops;
60813d19498SJack Steiner extern struct device *grudev;
60913d19498SJack Steiner
61013d19498SJack Steiner extern struct gru_vma_data *gru_alloc_vma_data(struct vm_area_struct *vma,
61113d19498SJack Steiner int tsid);
61213d19498SJack Steiner extern struct gru_thread_state *gru_find_thread_state(struct vm_area_struct
61313d19498SJack Steiner *vma, int tsid);
61413d19498SJack Steiner extern struct gru_thread_state *gru_alloc_thread_state(struct vm_area_struct
61513d19498SJack Steiner *vma, int tsid);
61655484c45SJack Steiner extern struct gru_state *gru_assign_gru_context(struct gru_thread_state *gts);
617d57c82b1SJack Steiner extern void gru_load_context(struct gru_thread_state *gts);
61855484c45SJack Steiner extern void gru_steal_context(struct gru_thread_state *gts);
61913d19498SJack Steiner extern void gru_unload_context(struct gru_thread_state *gts, int savestate);
62099f7c229SJack Steiner extern int gru_update_cch(struct gru_thread_state *gts);
62113d19498SJack Steiner extern void gts_drop(struct gru_thread_state *gts);
62213d19498SJack Steiner extern void gru_tgh_flush_init(struct gru_state *gru);
623d5826dd6SJack Steiner extern int gru_kservices_init(void);
624d5826dd6SJack Steiner extern void gru_kservices_exit(void);
6254107e1d3SJack Steiner extern irqreturn_t gru0_intr(int irq, void *dev_id);
6264107e1d3SJack Steiner extern irqreturn_t gru1_intr(int irq, void *dev_id);
6274107e1d3SJack Steiner extern irqreturn_t gru_intr_mblade(int irq, void *dev_id);
6289cc9b056SJack Steiner extern int gru_dump_chiplet_request(unsigned long arg);
6297e796a72SJack Steiner extern long gru_get_gseg_statistics(unsigned long arg);
63013d19498SJack Steiner extern int gru_handle_user_call_os(unsigned long address);
63113d19498SJack Steiner extern int gru_user_flush_tlb(unsigned long arg);
63213d19498SJack Steiner extern int gru_user_unload_context(unsigned long arg);
63313d19498SJack Steiner extern int gru_get_exception_detail(unsigned long arg);
63492b39388SJack Steiner extern int gru_set_context_option(unsigned long address);
635*643a16a0SZheng Wang extern int gru_check_context_placement(struct gru_thread_state *gts);
63613d19498SJack Steiner extern int gru_cpu_fault_map_id(void);
63713d19498SJack Steiner extern struct vm_area_struct *gru_find_vma(unsigned long vaddr);
63813d19498SJack Steiner extern void gru_flush_all_tlb(struct gru_state *gru);
63913d19498SJack Steiner extern int gru_proc_init(void);
64013d19498SJack Steiner extern void gru_proc_exit(void);
64113d19498SJack Steiner
642364b76dfSJack Steiner extern struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma,
643c550222fSJack Steiner int cbr_au_count, int dsr_au_count,
644c550222fSJack Steiner unsigned char tlb_preload_count, int options, int tsid);
6459ca8e40cSJack Steiner extern unsigned long gru_reserve_cb_resources(struct gru_state *gru,
64667704738SJason A. Donenfeld int cbr_au_count, signed char *cbmap);
6479ca8e40cSJack Steiner extern unsigned long gru_reserve_ds_resources(struct gru_state *gru,
64867704738SJason A. Donenfeld int dsr_au_count, signed char *dsmap);
6491770a80fSSouptick Joarder extern vm_fault_t gru_fault(struct vm_fault *vmf);
65013d19498SJack Steiner extern struct gru_mm_struct *gru_register_mmu_notifier(void);
65113d19498SJack Steiner extern void gru_drop_mmu_notifier(struct gru_mm_struct *gms);
65213d19498SJack Steiner
653eb5bd5e5SJack Steiner extern int gru_ktest(unsigned long arg);
65413d19498SJack Steiner extern void gru_flush_tlb_range(struct gru_mm_struct *gms, unsigned long start,
65513d19498SJack Steiner unsigned long len);
65613d19498SJack Steiner
6579ca8e40cSJack Steiner extern unsigned long gru_options;
65813d19498SJack Steiner
65913d19498SJack Steiner #endif /* __GRUTABLES_H__ */
660