diff options
Diffstat (limited to 'drivers/misc/sgi-gru/grutables.h')
| -rw-r--r-- | drivers/misc/sgi-gru/grutables.h | 609 |
1 files changed, 609 insertions, 0 deletions
diff --git a/drivers/misc/sgi-gru/grutables.h b/drivers/misc/sgi-gru/grutables.h new file mode 100644 index 000000000000..a78f70deeb59 --- /dev/null +++ b/drivers/misc/sgi-gru/grutables.h @@ -0,0 +1,609 @@ +/* + * SN Platform GRU Driver + * + * GRU DRIVER TABLES, MACROS, externs, etc + * + * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef __GRUTABLES_H__ +#define __GRUTABLES_H__ + +/* + * GRU Chiplet: + * The GRU is a user addressible memory accelerator. It provides + * several forms of load, store, memset, bcopy instructions. In addition, it + * contains special instructions for AMOs, sending messages to message + * queues, etc. + * + * The GRU is an integral part of the node controller. It connects + * directly to the cpu socket. In its current implementation, there are 2 + * GRU chiplets in the node controller on each blade (~node). + * + * The entire GRU memory space is fully coherent and cacheable by the cpus. + * + * Each GRU chiplet has a physical memory map that looks like the following: + * + * +-----------------+ + * |/////////////////| + * |/////////////////| + * |/////////////////| + * |/////////////////| + * |/////////////////| + * |/////////////////| + * |/////////////////| + * |/////////////////| + * +-----------------+ + * | system control | + * +-----------------+ _______ +-------------+ + * |/////////////////| / | | + * |/////////////////| / | | + * |/////////////////| / | instructions| + * |/////////////////| / | | + * |/////////////////| / | | + * |/////////////////| / |-------------| + * |/////////////////| / | | + * +-----------------+ | | + * | context 15 | | data | + * +-----------------+ | | + * | ...... | \ | | + * +-----------------+ \____________ +-------------+ + * | context 1 | + * +-----------------+ + * | context 0 | + * +-----------------+ + * + * Each of the "contexts" is a chunk of memory that can be mmaped into user + * space. The context consists of 2 parts: + * + * - an instruction space that can be directly accessed by the user + * to issue GRU instructions and to check instruction status. + * + * - a data area that acts as normal RAM. + * + * User instructions contain virtual addresses of data to be accessed by the + * GRU. The GRU contains a TLB that is used to convert these user virtual + * addresses to physical addresses. + * + * The "system control" area of the GRU chiplet is used by the kernel driver + * to manage user contexts and to perform functions such as TLB dropin and + * purging. + * + * One context may be reserved for the kernel and used for cross-partition + * communication. The GRU will also be used to asynchronously zero out + * large blocks of memory (not currently implemented). + * + * + * Tables: + * + * VDATA-VMA Data - Holds a few parameters. Head of linked list of + * GTS tables for threads using the GSEG + * GTS - Gru Thread State - contains info for managing a GSEG context. A + * GTS is allocated for each thread accessing a + * GSEG. + * GTD - GRU Thread Data - contains shadow copy of GRU data when GSEG is + * not loaded into a GRU + * GMS - GRU Memory Struct - Used to manage TLB shootdowns. Tracks GRUs + * where a GSEG has been loaded. Similar to + * an mm_struct but for GRU. + * + * GS - GRU State - Used to manage the state of a GRU chiplet + * BS - Blade State - Used to manage state of all GRU chiplets + * on a blade + * + * + * Normal task tables for task using GRU. + * - 2 threads in process + * - 2 GSEGs open in process + * - GSEG1 is being used by both threads + * - GSEG2 is used only by thread 2 + * + * task -->| + * task ---+---> mm ->------ (notifier) -------+-> gms + * | | + * |--> vma -> vdata ---> gts--->| GSEG1 (thread1) + * | | | + * | +-> gts--->| GSEG1 (thread2) + * | | + * |--> vma -> vdata ---> gts--->| GSEG2 (thread2) + * . + * . + * + * GSEGs are marked DONTCOPY on fork + * + * At open + * file.private_data -> NULL + * + * At mmap, + * vma -> vdata + * + * After gseg reference + * vma -> vdata ->gts + * + * After fork + * parent + * vma -> vdata -> gts + * child + * (vma is not copied) + * + */ + +#include <linux/rmap.h> +#include <linux/interrupt.h> +#include <linux/mutex.h> +#include <linux/wait.h> +#include <linux/mmu_notifier.h> +#include "gru.h" +#include "gruhandles.h" + +extern struct gru_stats_s gru_stats; +extern struct gru_blade_state *gru_base[]; +extern unsigned long gru_start_paddr, gru_end_paddr; + +#define GRU_MAX_BLADES MAX_NUMNODES +#define GRU_MAX_GRUS (GRU_MAX_BLADES * GRU_CHIPLETS_PER_BLADE) + +#define GRU_DRIVER_ID_STR "SGI GRU Device Driver" +#define GRU_DRIVER_VERSION_STR "0.80" + +/* + * GRU statistics. + */ +struct gru_stats_s { + atomic_long_t vdata_alloc; + atomic_long_t vdata_free; + atomic_long_t gts_alloc; + atomic_long_t gts_free; + atomic_long_t vdata_double_alloc; + atomic_long_t gts_double_allocate; + atomic_long_t assign_context; + atomic_long_t assign_context_failed; + atomic_long_t free_context; + atomic_long_t load_context; + atomic_long_t unload_context; + atomic_long_t steal_context; + atomic_long_t steal_context_failed; + atomic_long_t nopfn; + atomic_long_t break_cow; + atomic_long_t asid_new; + atomic_long_t asid_next; + atomic_long_t asid_wrap; + atomic_long_t asid_reuse; + atomic_long_t intr; + atomic_long_t call_os; + atomic_long_t call_os_check_for_bug; + atomic_long_t call_os_wait_queue; + atomic_long_t user_flush_tlb; + atomic_long_t user_unload_context; + atomic_long_t user_exception; + atomic_long_t set_task_slice; + atomic_long_t migrate_check; + atomic_long_t migrated_retarget; + atomic_long_t migrated_unload; + atomic_long_t migrated_unload_delay; + atomic_long_t migrated_nopfn_retarget; + atomic_long_t migrated_nopfn_unload; + atomic_long_t tlb_dropin; + atomic_long_t tlb_dropin_fail_no_asid; + atomic_long_t tlb_dropin_fail_upm; + atomic_long_t tlb_dropin_fail_invalid; + atomic_long_t tlb_dropin_fail_range_active; + atomic_long_t tlb_dropin_fail_idle; + atomic_long_t tlb_dropin_fail_fmm; + atomic_long_t mmu_invalidate_range; + atomic_long_t mmu_invalidate_page; + atomic_long_t mmu_clear_flush_young; + atomic_long_t flush_tlb; + atomic_long_t flush_tlb_gru; + atomic_long_t flush_tlb_gru_tgh; + atomic_long_t flush_tlb_gru_zero_asid; + + atomic_long_t copy_gpa; + + atomic_long_t mesq_receive; + atomic_long_t mesq_receive_none; + atomic_long_t mesq_send; + atomic_long_t mesq_send_failed; + atomic_long_t mesq_noop; + atomic_long_t mesq_send_unexpected_error; + atomic_long_t mesq_send_lb_overflow; + atomic_long_t mesq_send_qlimit_reached; + atomic_long_t mesq_send_amo_nacked; + atomic_long_t mesq_send_put_nacked; + atomic_long_t mesq_qf_not_full; + atomic_long_t mesq_qf_locked; + atomic_long_t mesq_qf_noop_not_full; + atomic_long_t mesq_qf_switch_head_failed; + atomic_long_t mesq_qf_unexpected_error; + atomic_long_t mesq_noop_unexpected_error; + atomic_long_t mesq_noop_lb_overflow; + atomic_long_t mesq_noop_qlimit_reached; + atomic_long_t mesq_noop_amo_nacked; + atomic_long_t mesq_noop_put_nacked; + +}; + +#define OPT_DPRINT 1 +#define OPT_STATS 2 +#define GRU_QUICKLOOK 4 + + +#define IRQ_GRU 110 /* Starting IRQ number for interrupts */ + +/* Delay in jiffies between attempts to assign a GRU context */ +#define GRU_ASSIGN_DELAY ((HZ * 20) / 1000) + +/* + * If a process has it's context stolen, min delay in jiffies before trying to + * steal a context from another process. + */ +#define GRU_STEAL_DELAY ((HZ * 200) / 1000) + +#define STAT(id) do { \ + if (gru_options & OPT_STATS) \ + atomic_long_inc(&gru_stats.id); \ + } while (0) + +#ifdef CONFIG_SGI_GRU_DEBUG +#define gru_dbg(dev, fmt, x...) \ + do { \ + if (gru_options & OPT_DPRINT) \ + dev_dbg(dev, "%s: " fmt, __func__, x); \ + } while (0) +#else +#define gru_dbg(x...) +#endif + +/*----------------------------------------------------------------------------- + * ASID management + */ +#define MAX_ASID 0xfffff0 +#define MIN_ASID 8 +#define ASID_INC 8 /* number of regions */ + +/* Generate a GRU asid value from a GRU base asid & a virtual address. */ +#if defined CONFIG_IA64 +#define VADDR_HI_BIT 64 +#define GRUREGION(addr) ((addr) >> (VADDR_HI_BIT - 3) & 3) +#elif defined CONFIG_X86_64 +#define VADDR_HI_BIT 48 +#define GRUREGION(addr) (0) /* ZZZ could do better */ +#else +#error "Unsupported architecture" +#endif +#define GRUASID(asid, addr) ((asid) + GRUREGION(addr)) + +/*------------------------------------------------------------------------------ + * File & VMS Tables + */ + +struct gru_state; + +/* + * This structure is pointed to from the mmstruct via the notifier pointer. + * There is one of these per address space. + */ +struct gru_mm_tracker { + unsigned int mt_asid_gen; /* ASID wrap count */ + int mt_asid; /* current base ASID for gru */ + unsigned short mt_ctxbitmap; /* bitmap of contexts using + asid */ +}; + +struct gru_mm_struct { + struct mmu_notifier ms_notifier; + atomic_t ms_refcnt; + spinlock_t ms_asid_lock; /* protects ASID assignment */ + atomic_t ms_range_active;/* num range_invals active */ + char ms_released; + wait_queue_head_t ms_wait_queue; + DECLARE_BITMAP(ms_asidmap, GRU_MAX_GRUS); + struct gru_mm_tracker ms_asids[GRU_MAX_GRUS]; +}; + +/* + * One of these structures is allocated when a GSEG is mmaped. The + * structure is pointed to by the vma->vm_private_data field in the vma struct. + */ +struct gru_vma_data { + spinlock_t vd_lock; /* Serialize access to vma */ + struct list_head vd_head; /* head of linked list of gts */ + long vd_user_options;/* misc user option flags */ + int vd_cbr_au_count; + int vd_dsr_au_count; +}; + +/* + * One of these is allocated for each thread accessing a mmaped GRU. A linked + * list of these structure is hung off the struct gru_vma_data in the mm_struct. + */ +struct gru_thread_state { + struct list_head ts_next; /* list - head at vma-private */ + struct mutex ts_ctxlock; /* load/unload CTX lock */ + struct mm_struct *ts_mm; /* mm currently mapped to + context */ + struct vm_area_struct *ts_vma; /* vma of GRU context */ + struct gru_state *ts_gru; /* GRU where the context is + loaded */ + struct gru_mm_struct *ts_gms; /* asid & ioproc struct */ + unsigned long ts_cbr_map; /* map of allocated CBRs */ + unsigned long ts_dsr_map; /* map of allocated DATA + resources */ + unsigned long ts_steal_jiffies;/* jiffies when context last + stolen */ + long ts_user_options;/* misc user option flags */ + pid_t ts_tgid_owner; /* task that is using the + context - for migration */ + int ts_tsid; /* thread that owns the + structure */ + int ts_tlb_int_select;/* target cpu if interrupts + enabled */ + int ts_ctxnum; /* context number where the + context is loaded */ + atomic_t ts_refcnt; /* reference count GTS */ + unsigned char ts_dsr_au_count;/* Number of DSR resources + required for contest */ + unsigned char ts_cbr_au_count;/* Number of CBR resources + required for contest */ + char ts_force_unload;/* force context to be unloaded + after migration */ + char ts_cbr_idx[GRU_CBR_AU];/* CBR numbers of each + allocated CB */ + unsigned long ts_gdata[0]; /* save area for GRU data (CB, + DS, CBE) */ +}; + +/* + * Threaded programs actually allocate an array of GSEGs when a context is + * created. Each thread uses a separate GSEG. TSID is the index into the GSEG + * array. + */ +#define TSID(a, v) (((a) - (v)->vm_start) / GRU_GSEG_PAGESIZE) +#define UGRUADDR(gts) ((gts)->ts_vma->vm_start + \ + (gts)->ts_tsid * GRU_GSEG_PAGESIZE) + +#define NULLCTX (-1) /* if context not loaded into GRU */ + +/*----------------------------------------------------------------------------- + * GRU State Tables + */ + +/* + * One of these exists for each GRU chiplet. + */ +struct gru_state { + struct gru_blade_state *gs_blade; /* GRU state for entire + blade */ + unsigned long gs_gru_base_paddr; /* Physical address of + gru segments (64) */ + void *gs_gru_base_vaddr; /* Virtual address of + gru segments (64) */ + unsigned char gs_gid; /* unique GRU number */ + unsigned char gs_tgh_local_shift; /* used to pick TGH for + local flush */ + unsigned char gs_tgh_first_remote; /* starting TGH# for + remote flush */ + unsigned short gs_blade_id; /* blade of GRU */ + spinlock_t gs_asid_lock; /* lock used for + assigning asids */ + spinlock_t gs_lock; /* lock used for + assigning contexts */ + + /* -- the following are protected by the gs_asid_lock spinlock ---- */ + unsigned int gs_asid; /* Next availe ASID */ + unsigned int gs_asid_limit; /* Limit of available + ASIDs */ + unsigned int gs_asid_gen; /* asid generation. + Inc on wrap */ + + /* --- the following fields are protected by the gs_lock spinlock --- */ + unsigned long gs_context_map; /* bitmap to manage + contexts in use */ + unsigned long gs_cbr_map; /* bitmap to manage CB + resources */ + unsigned long gs_dsr_map; /* bitmap used to manage + DATA resources */ + unsigned int gs_reserved_cbrs; /* Number of kernel- + reserved cbrs */ + unsigned int gs_reserved_dsr_bytes; /* Bytes of kernel- + reserved dsrs */ + unsigned short gs_active_contexts; /* number of contexts + in use */ + struct gru_thread_state *gs_gts[GRU_NUM_CCH]; /* GTS currently using + the context */ +}; + +/* + * This structure contains the GRU state for all the GRUs on a blade. + */ +struct gru_blade_state { + void *kernel_cb; /* First kernel + reserved cb */ + void *kernel_dsr; /* First kernel + reserved DSR */ + /* ---- the following are protected by the bs_lock spinlock ---- */ + spinlock_t bs_lock; /* lock used for + stealing contexts */ + int bs_lru_ctxnum; /* STEAL - last context + stolen */ + struct gru_state *bs_lru_gru; /* STEAL - last gru + stolen */ + + struct gru_state bs_grus[GRU_CHIPLETS_PER_BLADE]; +}; + +/*----------------------------------------------------------------------------- + * Address Primitives + */ +#define get_tfm_for_cpu(g, c) \ + ((struct gru_tlb_fault_map *)get_tfm((g)->gs_gru_base_vaddr, (c))) +#define get_tfh_by_index(g, i) \ + ((struct gru_tlb_fault_handle *)get_tfh((g)->gs_gru_base_vaddr, (i))) +#define get_tgh_by_index(g, i) \ + ((struct gru_tlb_global_handle *)get_tgh((g)->gs_gru_base_vaddr, (i))) +#define get_cbe_by_index(g, i) \ + ((struct gru_control_block_extended *)get_cbe((g)->gs_gru_base_vaddr,\ + (i))) + +/*----------------------------------------------------------------------------- + * Useful Macros + */ + +/* Given a blade# & chiplet#, get a pointer to the GRU */ +#define get_gru(b, c) (&gru_base[b]->bs_grus[c]) + +/* Number of bytes to save/restore when unloading/loading GRU contexts */ +#define DSR_BYTES(dsr) ((dsr) * GRU_DSR_AU_BYTES) +#define CBR_BYTES(cbr) ((cbr) * GRU_HANDLE_BYTES * GRU_CBR_AU_SIZE * 2) + +/* Convert a user CB number to the actual CBRNUM */ +#define thread_cbr_number(gts, n) ((gts)->ts_cbr_idx[(n) / GRU_CBR_AU_SIZE] \ + * GRU_CBR_AU_SIZE + (n) % GRU_CBR_AU_SIZE) + +/* Convert a gid to a pointer to the GRU */ +#define GID_TO_GRU(gid) \ + (gru_base[(gid) / GRU_CHIPLETS_PER_BLADE] ? \ + (&gru_base[(gid) / GRU_CHIPLETS_PER_BLADE]-> \ + bs_grus[(gid) % GRU_CHIPLETS_PER_BLADE]) : \ + NULL) + +/* Scan all active GRUs in a GRU bitmap */ +#define for_each_gru_in_bitmap(gid, map) \ + for ((gid) = find_first_bit((map), GRU_MAX_GRUS); (gid) < GRU_MAX_GRUS;\ + (gid)++, (gid) = find_next_bit((map), GRU_MAX_GRUS, (gid))) + +/* Scan all active GRUs on a specific blade */ +#define for_each_gru_on_blade(gru, nid, i) \ + for ((gru) = gru_base[nid]->bs_grus, (i) = 0; \ + (i) < GRU_CHIPLETS_PER_BLADE; \ + (i)++, (gru)++) + +/* Scan all active GTSs on a gru. Note: must hold ss_lock to use this macro. */ +#define for_each_gts_on_gru(gts, gru, ctxnum) \ + for ((ctxnum) = 0; (ctxnum) < GRU_NUM_CCH; (ctxnum)++) \ + if (((gts) = (gru)->gs_gts[ctxnum])) + +/* Scan each CBR whose bit is set in a TFM (or copy of) */ +#define for_each_cbr_in_tfm(i, map) \ + for ((i) = find_first_bit(map, GRU_NUM_CBE); \ + (i) < GRU_NUM_CBE; \ + (i)++, (i) = find_next_bit(map, GRU_NUM_CBE, i)) + +/* Scan each CBR in a CBR bitmap. Note: multiple CBRs in an allocation unit */ +#define for_each_cbr_in_allocation_map(i, map, k) \ + for ((k) = find_first_bit(map, GRU_CBR_AU); (k) < GRU_CBR_AU; \ + (k) = find_next_bit(map, GRU_CBR_AU, (k) + 1)) \ + for ((i) = (k)*GRU_CBR_AU_SIZE; \ + (i) < ((k) + 1) * GRU_CBR_AU_SIZE; (i)++) + +/* Scan each DSR in a DSR bitmap. Note: multiple DSRs in an allocation unit */ +#define for_each_dsr_in_allocation_map(i, map, k) \ + for ((k) = find_first_bit((const unsigned long *)map, GRU_DSR_AU);\ + (k) < GRU_DSR_AU; \ + (k) = find_next_bit((const unsigned long *)map, \ + GRU_DSR_AU, (k) + 1)) \ + for ((i) = (k) * GRU_DSR_AU_CL; \ + (i) < ((k) + 1) * GRU_DSR_AU_CL; (i)++) + +#define gseg_physical_address(gru, ctxnum) \ + ((gru)->gs_gru_base_paddr + ctxnum * GRU_GSEG_STRIDE) +#define gseg_virtual_address(gru, ctxnum) \ + ((gru)->gs_gru_base_vaddr + ctxnum * GRU_GSEG_STRIDE) + +/*----------------------------------------------------------------------------- + * Lock / Unlock GRU handles + * Use the "delresp" bit in the handle as a "lock" bit. + */ + +/* Lock hierarchy checking enabled only in emulator */ + +static inline void __lock_handle(void *h) +{ + while (test_and_set_bit(1, h)) + cpu_relax(); +} + +static inline void __unlock_handle(void *h) +{ + clear_bit(1, h); +} + +static inline void lock_cch_handle(struct gru_context_configuration_handle *cch) +{ + __lock_handle(cch); +} + +static inline void unlock_cch_handle(struct gru_context_configuration_handle + *cch) +{ + __unlock_handle(cch); +} + +static inline void lock_tgh_handle(struct gru_tlb_global_handle *tgh) +{ + __lock_handle(tgh); +} + +static inline void unlock_tgh_handle(struct gru_tlb_global_handle *tgh) +{ + __unlock_handle(tgh); +} + +/*----------------------------------------------------------------------------- + * Function prototypes & externs + */ +struct gru_unload_context_req; + +extern struct vm_operations_struct gru_vm_ops; +extern struct device *grudev; + +extern struct gru_vma_data *gru_alloc_vma_data(struct vm_area_struct *vma, + int tsid); +extern struct gru_thread_state *gru_find_thread_state(struct vm_area_struct + *vma, int tsid); +extern struct gru_thread_state *gru_alloc_thread_state(struct vm_area_struct + *vma, int tsid); +extern void gru_unload_context(struct gru_thread_state *gts, int savestate); +extern void gts_drop(struct gru_thread_state *gts); +extern void gru_tgh_flush_init(struct gru_state *gru); +extern int gru_kservices_init(struct gru_state *gru); +extern irqreturn_t gru_intr(int irq, void *dev_id); +extern int gru_handle_user_call_os(unsigned long address); +extern int gru_user_flush_tlb(unsigned long arg); +extern int gru_user_unload_context(unsigned long arg); +extern int gru_get_exception_detail(unsigned long arg); +extern int gru_set_task_slice(long address); +extern int gru_cpu_fault_map_id(void); +extern struct vm_area_struct *gru_find_vma(unsigned long vaddr); +extern void gru_flush_all_tlb(struct gru_state *gru); +extern int gru_proc_init(void); +extern void gru_proc_exit(void); + +extern unsigned long gru_reserve_cb_resources(struct gru_state *gru, + int cbr_au_count, char *cbmap); +extern unsigned long gru_reserve_ds_resources(struct gru_state *gru, + int dsr_au_count, char *dsmap); +extern int gru_fault(struct vm_area_struct *, struct vm_fault *vmf); +extern struct gru_mm_struct *gru_register_mmu_notifier(void); +extern void gru_drop_mmu_notifier(struct gru_mm_struct *gms); + +extern void gru_flush_tlb_range(struct gru_mm_struct *gms, unsigned long start, + unsigned long len); + +extern unsigned long gru_options; + +#endif /* __GRUTABLES_H__ */ |