diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/misc/sgi-gru/grumain.c | 60 | ||||
| -rw-r--r-- | drivers/misc/sgi-gru/grutables.h | 2 |
2 files changed, 33 insertions, 29 deletions
diff --git a/drivers/misc/sgi-gru/grumain.c b/drivers/misc/sgi-gru/grumain.c index 374af38862e..14baabc79da 100644 --- a/drivers/misc/sgi-gru/grumain.c +++ b/drivers/misc/sgi-gru/grumain.c @@ -299,15 +299,13 @@ static struct gru_thread_state *gru_find_current_gts_nolock(struct gru_vma_data /* * Allocate a thread state structure. */ -static struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma, - struct gru_vma_data *vdata, - int tsid) +struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma, + int cbr_au_count, int dsr_au_count, int options, int tsid) { struct gru_thread_state *gts; int bytes; - bytes = DSR_BYTES(vdata->vd_dsr_au_count) + - CBR_BYTES(vdata->vd_cbr_au_count); + bytes = DSR_BYTES(dsr_au_count) + CBR_BYTES(cbr_au_count); bytes += sizeof(struct gru_thread_state); gts = kzalloc(bytes, GFP_KERNEL); if (!gts) @@ -316,21 +314,22 @@ static struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma, STAT(gts_alloc); atomic_set(>s->ts_refcnt, 1); mutex_init(>s->ts_ctxlock); - gts->ts_cbr_au_count = vdata->vd_cbr_au_count; - gts->ts_dsr_au_count = vdata->vd_dsr_au_count; - gts->ts_user_options = vdata->vd_user_options; + gts->ts_cbr_au_count = cbr_au_count; + gts->ts_dsr_au_count = dsr_au_count; + gts->ts_user_options = options; gts->ts_tsid = tsid; - gts->ts_user_options = vdata->vd_user_options; gts->ts_ctxnum = NULLCTX; - gts->ts_mm = current->mm; - gts->ts_vma = vma; gts->ts_tlb_int_select = -1; - gts->ts_gms = gru_register_mmu_notifier(); gts->ts_sizeavail = GRU_SIZEAVAIL(PAGE_SHIFT); - if (!gts->ts_gms) - goto err; + if (vma) { + gts->ts_mm = current->mm; + gts->ts_vma = vma; + gts->ts_gms = gru_register_mmu_notifier(); + if (!gts->ts_gms) + goto err; + } - gru_dbg(grudev, "alloc vdata %p, new gts %p\n", vdata, gts); + gru_dbg(grudev, "alloc gts %p\n", gts); return gts; err: @@ -381,7 +380,8 @@ 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, tsid); + gts = gru_alloc_gts(vma, vdata->vd_cbr_au_count, vdata->vd_dsr_au_count, + vdata->vd_user_options, tsid); if (!gts) return NULL; @@ -645,7 +645,7 @@ static int gru_retarget_intr(struct gru_thread_state *gts) #define next_gru(b, g) (((g) < &(b)->bs_grus[GRU_CHIPLETS_PER_BLADE - 1]) ? \ ((g)+1) : &(b)->bs_grus[0]) -static void gru_steal_context(struct gru_thread_state *gts) +static void gru_steal_context(struct gru_thread_state *gts, int blade_id) { struct gru_blade_state *blade; struct gru_state *gru, *gru0; @@ -655,8 +655,7 @@ static void gru_steal_context(struct gru_thread_state *gts) cbr = gts->ts_cbr_au_count; dsr = gts->ts_dsr_au_count; - preempt_disable(); - blade = gru_base[uv_numa_blade_id()]; + blade = gru_base[blade_id]; spin_lock(&blade->bs_lock); ctxnum = next_ctxnum(blade->bs_lru_ctxnum); @@ -693,7 +692,6 @@ static void gru_steal_context(struct gru_thread_state *gts) blade->bs_lru_gru = gru; blade->bs_lru_ctxnum = ctxnum; spin_unlock(&blade->bs_lock); - preempt_enable(); if (ngts) { STAT(steal_context); @@ -713,17 +711,17 @@ static void gru_steal_context(struct gru_thread_state *gts) /* * Scan the GRUs on the local blade & assign a GRU context. */ -static struct gru_state *gru_assign_gru_context(struct gru_thread_state *gts) +static struct gru_state *gru_assign_gru_context(struct gru_thread_state *gts, + int blade) { struct gru_state *gru, *grux; int i, max_active_contexts; - preempt_disable(); again: gru = NULL; max_active_contexts = GRU_NUM_CCH; - for_each_gru_on_blade(grux, uv_numa_blade_id(), i) { + for_each_gru_on_blade(grux, blade, i) { if (check_gru_resources(grux, gts->ts_cbr_au_count, gts->ts_dsr_au_count, max_active_contexts)) { @@ -763,7 +761,6 @@ again: STAT(assign_context_failed); } - preempt_enable(); return gru; } @@ -778,6 +775,7 @@ int gru_fault(struct vm_area_struct *vma, struct vm_fault *vmf) { struct gru_thread_state *gts; unsigned long paddr, vaddr; + int blade_id; vaddr = (unsigned long)vmf->virtual_address; gru_dbg(grudev, "vma %p, vaddr 0x%lx (0x%lx)\n", @@ -792,8 +790,10 @@ int gru_fault(struct vm_area_struct *vma, struct vm_fault *vmf) again: mutex_lock(>s->ts_ctxlock); preempt_disable(); + blade_id = uv_numa_blade_id(); + if (gts->ts_gru) { - if (gts->ts_gru->gs_blade_id != uv_numa_blade_id()) { + if (gts->ts_gru->gs_blade_id != blade_id) { STAT(migrated_nopfn_unload); gru_unload_context(gts, 1); } else { @@ -803,12 +803,14 @@ again: } if (!gts->ts_gru) { - if (!gru_assign_gru_context(gts)) { - mutex_unlock(>s->ts_ctxlock); + if (!gru_assign_gru_context(gts, blade_id)) { preempt_enable(); + mutex_unlock(>s->ts_ctxlock); + set_current_state(TASK_INTERRUPTIBLE); schedule_timeout(GRU_ASSIGN_DELAY); /* true hack ZZZ */ + blade_id = uv_numa_blade_id(); if (gts->ts_steal_jiffies + GRU_STEAL_DELAY < jiffies) - gru_steal_context(gts); + gru_steal_context(gts, blade_id); goto again; } gru_load_context(gts); @@ -818,8 +820,8 @@ again: vma->vm_page_prot); } - mutex_unlock(>s->ts_ctxlock); preempt_enable(); + mutex_unlock(>s->ts_ctxlock); return VM_FAULT_NOPAGE; } diff --git a/drivers/misc/sgi-gru/grutables.h b/drivers/misc/sgi-gru/grutables.h index d768f54dc25..c69086c9b98 100644 --- a/drivers/misc/sgi-gru/grutables.h +++ b/drivers/misc/sgi-gru/grutables.h @@ -630,6 +630,8 @@ extern void gru_flush_all_tlb(struct gru_state *gru); 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); 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, |