diff options
Diffstat (limited to 'drivers/misc/sgi-gru')
| -rw-r--r-- | drivers/misc/sgi-gru/grufault.c | 89 | ||||
| -rw-r--r-- | drivers/misc/sgi-gru/grufile.c | 1 | ||||
| -rw-r--r-- | drivers/misc/sgi-gru/gruhandles.c | 11 | ||||
| -rw-r--r-- | drivers/misc/sgi-gru/gruhandles.h | 20 | ||||
| -rw-r--r-- | drivers/misc/sgi-gru/grukservices.c | 2 | ||||
| -rw-r--r-- | drivers/misc/sgi-gru/grulib.h | 1 | ||||
| -rw-r--r-- | drivers/misc/sgi-gru/grumain.c | 8 | ||||
| -rw-r--r-- | drivers/misc/sgi-gru/gruprocfs.c | 4 | ||||
| -rw-r--r-- | drivers/misc/sgi-gru/grutables.h | 9 |
9 files changed, 129 insertions, 16 deletions
diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c index 7d757e9c42f0..a1b3a1d66af5 100644 --- a/drivers/misc/sgi-gru/grufault.c +++ b/drivers/misc/sgi-gru/grufault.c @@ -290,6 +290,61 @@ upm: /* + * Flush a CBE from cache. The CBE is clean in the cache. Dirty the + * CBE cacheline so that the line will be written back to home agent. + * Otherwise the line may be silently dropped. This has no impact + * except on performance. + */ +static void gru_flush_cache_cbe(struct gru_control_block_extended *cbe) +{ + if (unlikely(cbe)) { + cbe->cbrexecstatus = 0; /* make CL dirty */ + gru_flush_cache(cbe); + } +} + +/* + * Preload the TLB with entries that may be required. Currently, preloading + * is implemented only for BCOPY. Preload <tlb_preload_count> pages OR to + * the end of the bcopy tranfer, whichever is smaller. + */ +static void gru_preload_tlb(struct gru_state *gru, + struct gru_thread_state *gts, int atomic, + unsigned long fault_vaddr, int asid, int write, + unsigned char tlb_preload_count, + struct gru_tlb_fault_handle *tfh, + struct gru_control_block_extended *cbe) +{ + unsigned long vaddr = 0, gpa; + int ret, pageshift; + + if (cbe->opccpy != OP_BCOPY) + return; + + if (fault_vaddr == cbe->cbe_baddr0) + vaddr = fault_vaddr + GRU_CACHE_LINE_BYTES * cbe->cbe_src_cl - 1; + else if (fault_vaddr == cbe->cbe_baddr1) + vaddr = fault_vaddr + (1 << cbe->xtypecpy) * cbe->cbe_nelemcur - 1; + + fault_vaddr &= PAGE_MASK; + vaddr &= PAGE_MASK; + vaddr = min(vaddr, fault_vaddr + tlb_preload_count * PAGE_SIZE); + + while (vaddr > fault_vaddr) { + ret = gru_vtop(gts, vaddr, write, atomic, &gpa, &pageshift); + if (ret || tfh_write_only(tfh, gpa, GAA_RAM, vaddr, asid, write, + GRU_PAGESIZE(pageshift))) + return; + gru_dbg(grudev, + "%s: gid %d, gts 0x%p, tfh 0x%p, vaddr 0x%lx, asid 0x%x, rw %d, ps %d, gpa 0x%lx\n", + atomic ? "atomic" : "non-atomic", gru->gs_gid, gts, tfh, + vaddr, asid, write, pageshift, gpa); + vaddr -= PAGE_SIZE; + STAT(tlb_preload_page); + } +} + +/* * Drop a TLB entry into the GRU. The fault is described by info in an TFH. * Input: * cb Address of user CBR. Null if not running in user context @@ -303,6 +358,8 @@ static int gru_try_dropin(struct gru_thread_state *gts, struct gru_tlb_fault_handle *tfh, struct gru_instruction_bits *cbk) { + struct gru_control_block_extended *cbe = NULL; + unsigned char tlb_preload_count = gts->ts_tlb_preload_count; int pageshift = 0, asid, write, ret, atomic = !cbk, indexway; unsigned long gpa = 0, vaddr = 0; @@ -314,6 +371,14 @@ static int gru_try_dropin(struct gru_thread_state *gts, */ /* + * Prefetch the CBE if doing TLB preloading + */ + if (unlikely(tlb_preload_count)) { + cbe = gru_tfh_to_cbe(tfh); + prefetchw(cbe); + } + + /* * Error if TFH state is IDLE or FMM mode & the user issuing a UPM call. * Might be a hardware race OR a stupid user. Ignore FMM because FMM * is a transient state. @@ -359,6 +424,12 @@ static int gru_try_dropin(struct gru_thread_state *gts, goto failupm; } } + + if (unlikely(cbe) && pageshift == PAGE_SHIFT) { + gru_preload_tlb(gts->ts_gru, gts, atomic, vaddr, asid, write, tlb_preload_count, tfh, cbe); + gru_flush_cache_cbe(cbe); + } + gru_cb_set_istatus_active(cbk); tfh_write_restart(tfh, gpa, GAA_RAM, vaddr, asid, write, GRU_PAGESIZE(pageshift)); @@ -378,11 +449,13 @@ failnoasid: tfh_user_polling_mode(tfh); else gru_flush_cache(tfh); + gru_flush_cache_cbe(cbe); return -EAGAIN; failupm: /* Atomic failure switch CBR to UPM */ tfh_user_polling_mode(tfh); + gru_flush_cache_cbe(cbe); STAT(tlb_dropin_fail_upm); gru_dbg(grudev, "FAILED upm tfh: 0x%p, vaddr 0x%lx\n", tfh, vaddr); return 1; @@ -390,6 +463,7 @@ failupm: failfmm: /* FMM state on UPM call */ gru_flush_cache(tfh); + gru_flush_cache_cbe(cbe); STAT(tlb_dropin_fail_fmm); gru_dbg(grudev, "FAILED fmm tfh: 0x%p, state %d\n", tfh, tfh->state); return 0; @@ -397,6 +471,7 @@ failfmm: failnoexception: /* TFH status did not show exception pending */ gru_flush_cache(tfh); + gru_flush_cache_cbe(cbe); if (cbk) gru_flush_cache(cbk); STAT(tlb_dropin_fail_no_exception); @@ -407,6 +482,7 @@ failnoexception: failidle: /* TFH state was idle - no miss pending */ gru_flush_cache(tfh); + gru_flush_cache_cbe(cbe); if (cbk) gru_flush_cache(cbk); STAT(tlb_dropin_fail_idle); @@ -416,6 +492,7 @@ failidle: failinval: /* All errors (atomic & non-atomic) switch CBR to EXCEPTION state */ tfh_exception(tfh); + gru_flush_cache_cbe(cbe); STAT(tlb_dropin_fail_invalid); gru_dbg(grudev, "FAILED inval tfh: 0x%p, vaddr 0x%lx\n", tfh, vaddr); return -EFAULT; @@ -426,6 +503,7 @@ failactive: tfh_user_polling_mode(tfh); else gru_flush_cache(tfh); + gru_flush_cache_cbe(cbe); STAT(tlb_dropin_fail_range_active); gru_dbg(grudev, "FAILED range active: tfh 0x%p, vaddr 0x%lx\n", tfh, vaddr); @@ -627,7 +705,7 @@ int gru_get_exception_detail(unsigned long arg) excdet.exceptdet1 = cbe->idef3upd; excdet.cbrstate = cbe->cbrstate; excdet.cbrexecstatus = cbe->cbrexecstatus; - gru_flush_cache(cbe); + gru_flush_cache_cbe(cbe); ret = 0; } else { ret = -EAGAIN; @@ -770,9 +848,12 @@ int gru_set_context_option(unsigned long arg) return -EFAULT; gru_dbg(grudev, "op %d, gseg 0x%lx, value1 0x%lx\n", req.op, req.gseg, req.val1); - gts = gru_alloc_locked_gts(req.gseg); - if (IS_ERR(gts)) - return PTR_ERR(gts); + gts = gru_find_lock_gts(req.gseg); + if (!gts) { + gts = gru_alloc_locked_gts(req.gseg); + if (IS_ERR(gts)) + return PTR_ERR(gts); + } switch (req.op) { case sco_blade_chiplet: diff --git a/drivers/misc/sgi-gru/grufile.c b/drivers/misc/sgi-gru/grufile.c index 9d41208a6c92..cb3b4d228475 100644 --- a/drivers/misc/sgi-gru/grufile.c +++ b/drivers/misc/sgi-gru/grufile.c @@ -152,6 +152,7 @@ static int gru_create_new_context(unsigned long arg) vdata->vd_dsr_au_count = GRU_DS_BYTES_TO_AU(req.data_segment_bytes); vdata->vd_cbr_au_count = GRU_CB_COUNT_TO_AU(req.control_blocks); + vdata->vd_tlb_preload_count = req.tlb_preload_count; ret = 0; } up_write(¤t->mm->mmap_sem); diff --git a/drivers/misc/sgi-gru/gruhandles.c b/drivers/misc/sgi-gru/gruhandles.c index 66d67d9bc9b6..2f30badc6ffd 100644 --- a/drivers/misc/sgi-gru/gruhandles.c +++ b/drivers/misc/sgi-gru/gruhandles.c @@ -165,17 +165,20 @@ int tgh_invalidate(struct gru_tlb_global_handle *tgh, return wait_instruction_complete(tgh, tghop_invalidate); } -void tfh_write_only(struct gru_tlb_fault_handle *tfh, - unsigned long pfn, unsigned long vaddr, - int asid, int dirty, int pagesize) +int tfh_write_only(struct gru_tlb_fault_handle *tfh, + unsigned long paddr, int gaa, + unsigned long vaddr, int asid, int dirty, + int pagesize) { tfh->fillasid = asid; tfh->fillvaddr = vaddr; - tfh->pfn = pfn; + tfh->pfn = paddr >> GRU_PADDR_SHIFT; + tfh->gaa = gaa; tfh->dirty = dirty; tfh->pagesize = pagesize; tfh->opc = TFHOP_WRITE_ONLY; start_instruction(tfh); + return wait_instruction_complete(tfh, tfhop_write_only); } void tfh_write_restart(struct gru_tlb_fault_handle *tfh, diff --git a/drivers/misc/sgi-gru/gruhandles.h b/drivers/misc/sgi-gru/gruhandles.h index 47b762f89e0d..ea584ebf65b1 100644 --- a/drivers/misc/sgi-gru/gruhandles.h +++ b/drivers/misc/sgi-gru/gruhandles.h @@ -164,6 +164,16 @@ static inline void *gru_chiplet_vaddr(void *vaddr, int pnode, int chiplet) return vaddr + GRU_SIZE * (2 * pnode + chiplet); } +static inline struct gru_control_block_extended *gru_tfh_to_cbe( + struct gru_tlb_fault_handle *tfh) +{ + unsigned long cbe; + + cbe = (unsigned long)tfh - GRU_TFH_BASE + GRU_CBE_BASE; + return (struct gru_control_block_extended*)cbe; +} + + /* @@ -446,6 +456,12 @@ struct gru_control_block_extended { unsigned int cbrexecstatus:8; }; +/* CBE fields for active BCOPY instructions */ +#define cbe_baddr0 idef1upd +#define cbe_baddr1 idef3upd +#define cbe_src_cl idef6cpy +#define cbe_nelemcur idef5upd + enum gru_cbr_state { CBRSTATE_INACTIVE, CBRSTATE_IDLE, @@ -493,8 +509,8 @@ int cch_interrupt_sync(struct gru_context_configuration_handle *cch); int tgh_invalidate(struct gru_tlb_global_handle *tgh, unsigned long vaddr, unsigned long vaddrmask, int asid, int pagesize, int global, int n, unsigned short ctxbitmap); -void tfh_write_only(struct gru_tlb_fault_handle *tfh, unsigned long pfn, - unsigned long vaddr, int asid, int dirty, int pagesize); +int tfh_write_only(struct gru_tlb_fault_handle *tfh, unsigned long paddr, + int gaa, unsigned long vaddr, int asid, int dirty, int pagesize); void tfh_write_restart(struct gru_tlb_fault_handle *tfh, unsigned long paddr, int gaa, unsigned long vaddr, int asid, int dirty, int pagesize); void tfh_restart(struct gru_tlb_fault_handle *tfh); diff --git a/drivers/misc/sgi-gru/grukservices.c b/drivers/misc/sgi-gru/grukservices.c index 4da6f56833d1..d9ff0289a1c3 100644 --- a/drivers/misc/sgi-gru/grukservices.c +++ b/drivers/misc/sgi-gru/grukservices.c @@ -161,7 +161,7 @@ static void gru_load_kernel_context(struct gru_blade_state *bs, int blade_id) down_write(&bs->bs_kgts_sema); if (!bs->bs_kgts) { - bs->bs_kgts = gru_alloc_gts(NULL, 0, 0, 0, 0); + bs->bs_kgts = gru_alloc_gts(NULL, 0, 0, 0, 0, 0); bs->bs_kgts->ts_user_blade_id = blade_id; } kgts = bs->bs_kgts; diff --git a/drivers/misc/sgi-gru/grulib.h b/drivers/misc/sgi-gru/grulib.h index e033b36df7e0..c6928af7393a 100644 --- a/drivers/misc/sgi-gru/grulib.h +++ b/drivers/misc/sgi-gru/grulib.h @@ -86,6 +86,7 @@ struct gru_create_context_req { unsigned int control_blocks; unsigned int maximum_thread_count; unsigned int options; + unsigned char tlb_preload_count; }; /* diff --git a/drivers/misc/sgi-gru/grumain.c b/drivers/misc/sgi-gru/grumain.c index ebabbdcbb97f..ade0925eab0e 100644 --- a/drivers/misc/sgi-gru/grumain.c +++ b/drivers/misc/sgi-gru/grumain.c @@ -316,7 +316,8 @@ static struct gru_thread_state *gru_find_current_gts_nolock(struct gru_vma_data * Allocate a thread state structure. */ struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma, - int cbr_au_count, int dsr_au_count, int options, int tsid) + int cbr_au_count, int dsr_au_count, + unsigned char tlb_preload_count, int options, int tsid) { struct gru_thread_state *gts; struct gru_mm_struct *gms; @@ -334,6 +335,7 @@ struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma, mutex_init(>s->ts_ctxlock); gts->ts_cbr_au_count = cbr_au_count; gts->ts_dsr_au_count = dsr_au_count; + gts->ts_tlb_preload_count = tlb_preload_count; gts->ts_user_options = options; gts->ts_user_blade_id = -1; gts->ts_user_chiplet_id = -1; @@ -403,7 +405,9 @@ struct gru_thread_state *gru_alloc_thread_state(struct vm_area_struct *vma, struct gru_vma_data *vdata = vma->vm_private_data; struct gru_thread_state *gts, *ngts; - gts = gru_alloc_gts(vma, vdata->vd_cbr_au_count, vdata->vd_dsr_au_count, + gts = gru_alloc_gts(vma, vdata->vd_cbr_au_count, + vdata->vd_dsr_au_count, + vdata->vd_tlb_preload_count, vdata->vd_user_options, tsid); if (IS_ERR(gts)) return gts; diff --git a/drivers/misc/sgi-gru/gruprocfs.c b/drivers/misc/sgi-gru/gruprocfs.c index 0a57ab29cd30..54a5a1c35ad1 100644 --- a/drivers/misc/sgi-gru/gruprocfs.c +++ b/drivers/misc/sgi-gru/gruprocfs.c @@ -76,6 +76,7 @@ static int statistics_show(struct seq_file *s, void *p) printstat(s, check_context_retarget_intr); printstat(s, check_context_unload); printstat(s, tlb_dropin); + printstat(s, tlb_preload_page); printstat(s, tlb_dropin_fail_no_asid); printstat(s, tlb_dropin_fail_upm); printstat(s, tlb_dropin_fail_invalid); @@ -127,7 +128,8 @@ static int mcs_statistics_show(struct seq_file *s, void *p) int op; unsigned long total, count, max; static char *id[] = {"cch_allocate", "cch_start", "cch_interrupt", - "cch_interrupt_sync", "cch_deallocate", "tgh_invalidate"}; + "cch_interrupt_sync", "cch_deallocate", "tfh_write_only", + "tfh_write_restart", "tgh_invalidate"}; seq_printf(s, "%-20s%12s%12s%12s\n", "#id", "count", "aver-clks", "max-clks"); for (op = 0; op < mcsop_last; op++) { diff --git a/drivers/misc/sgi-gru/grutables.h b/drivers/misc/sgi-gru/grutables.h index 76fe2987fc9f..adaf691d59f5 100644 --- a/drivers/misc/sgi-gru/grutables.h +++ b/drivers/misc/sgi-gru/grutables.h @@ -202,6 +202,7 @@ struct gru_stats_s { atomic_long_t check_context_retarget_intr; atomic_long_t check_context_unload; atomic_long_t tlb_dropin; + atomic_long_t tlb_preload_page; atomic_long_t tlb_dropin_fail_no_asid; atomic_long_t tlb_dropin_fail_upm; atomic_long_t tlb_dropin_fail_invalid; @@ -245,7 +246,8 @@ struct gru_stats_s { }; enum mcs_op {cchop_allocate, cchop_start, cchop_interrupt, cchop_interrupt_sync, - cchop_deallocate, tghop_invalidate, mcsop_last}; + cchop_deallocate, tfhop_write_only, tfhop_write_restart, + tghop_invalidate, mcsop_last}; struct mcs_op_statistic { atomic_long_t count; @@ -335,6 +337,7 @@ struct gru_vma_data { long vd_user_options;/* misc user option flags */ int vd_cbr_au_count; int vd_dsr_au_count; + unsigned char vd_tlb_preload_count; }; /* @@ -350,6 +353,7 @@ struct gru_thread_state { struct gru_state *ts_gru; /* GRU where the context is loaded */ struct gru_mm_struct *ts_gms; /* asid & ioproc struct */ + unsigned char ts_tlb_preload_count; /* TLB preload pages */ unsigned long ts_cbr_map; /* map of allocated CBRs */ unsigned long ts_dsr_map; /* map of allocated DATA resources */ @@ -661,7 +665,8 @@ extern int gru_proc_init(void); extern void gru_proc_exit(void); extern struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma, - int cbr_au_count, int dsr_au_count, int options, int tsid); + int cbr_au_count, int dsr_au_count, + unsigned char tlb_preload_count, int options, int tsid); 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, |