1 files changed, 49 insertions, 35 deletions

diff --git a/drivers/misc/sgi-gru/grumain.c b/drivers/misc/sgi-gru/grumain.c
index 3d2fc216bae5..ec3f7a17d221 100644
--- a/drivers/misc/sgi-gru/grumain.c
+++ b/drivers/misc/sgi-gru/grumain.c
@@ -76,10 +76,9 @@ int gru_cpu_fault_map_id(void)
 /* Hit the asid limit. Start over */
 static int gru_wrap_asid(struct gru_state *gru)
 {
-	gru_dbg(grudev, "gru %p\n", gru);
+	gru_dbg(grudev, "gid %d\n", gru->gs_gid);
 	STAT(asid_wrap);
 	gru->gs_asid_gen++;
-	gru_flush_all_tlb(gru);
 	return MIN_ASID;
 }
 
@@ -88,19 +87,21 @@ static int gru_reset_asid_limit(struct gru_state *gru, int asid)
 {
 	int i, gid, inuse_asid, limit;
 
-	gru_dbg(grudev, "gru %p, asid 0x%x\n", gru, asid);
+	gru_dbg(grudev, "gid %d, asid 0x%x\n", gru->gs_gid, asid);
 	STAT(asid_next);
 	limit = MAX_ASID;
 	if (asid >= limit)
 		asid = gru_wrap_asid(gru);
+	gru_flush_all_tlb(gru);
 	gid = gru->gs_gid;
 again:
 	for (i = 0; i < GRU_NUM_CCH; i++) {
 		if (!gru->gs_gts[i])
 			continue;
 		inuse_asid = gru->gs_gts[i]->ts_gms->ms_asids[gid].mt_asid;
-		gru_dbg(grudev, "gru %p, inuse_asid 0x%x, cxtnum %d, gts %p\n",
-			gru, inuse_asid, i, gru->gs_gts[i]);
+		gru_dbg(grudev, "gid %d, gts %p, gms %p, inuse 0x%x, cxt %d\n",
+			gru->gs_gid, gru->gs_gts[i], gru->gs_gts[i]->ts_gms,
+			inuse_asid, i);
 		if (inuse_asid == asid) {
 			asid += ASID_INC;
 			if (asid >= limit) {
@@ -120,8 +121,8 @@ again:
 	}
 	gru->gs_asid_limit = limit;
 	gru->gs_asid = asid;
-	gru_dbg(grudev, "gru %p, new asid 0x%x, new_limit 0x%x\n", gru, asid,
-		limit);
+	gru_dbg(grudev, "gid %d, new asid 0x%x, new_limit 0x%x\n", gru->gs_gid,
+					asid, limit);
 	return asid;
 }
 
@@ -130,14 +131,12 @@ static int gru_assign_asid(struct gru_state *gru)
 {
 	int asid;
 
-	spin_lock(&gru->gs_asid_lock);
 	gru->gs_asid += ASID_INC;
 	asid = gru->gs_asid;
 	if (asid >= gru->gs_asid_limit)
 		asid = gru_reset_asid_limit(gru, asid);
-	spin_unlock(&gru->gs_asid_lock);
 
-	gru_dbg(grudev, "gru %p, asid 0x%x\n", gru, asid);
+	gru_dbg(grudev, "gid %d, asid 0x%x\n", gru->gs_gid, asid);
 	return asid;
 }
 
@@ -215,17 +214,20 @@ static int check_gru_resources(struct gru_state *gru, int cbr_au_count,
  * TLB manangment requires tracking all GRU chiplets that have loaded a GSEG
  * context.
  */
-static int gru_load_mm_tracker(struct gru_state *gru, struct gru_mm_struct *gms,
-			       int ctxnum)
+static int gru_load_mm_tracker(struct gru_state *gru,
+					struct gru_thread_state *gts)
 {
+	struct gru_mm_struct *gms = gts->ts_gms;
 	struct gru_mm_tracker *asids = &gms->ms_asids[gru->gs_gid];
-	unsigned short ctxbitmap = (1 << ctxnum);
+	unsigned short ctxbitmap = (1 << gts->ts_ctxnum);
 	int asid;
 
 	spin_lock(&gms->ms_asid_lock);
 	asid = asids->mt_asid;
 
-	if (asid == 0 || asids->mt_asid_gen != gru->gs_asid_gen) {
+	spin_lock(&gru->gs_asid_lock);
+	if (asid == 0 || (asids->mt_ctxbitmap == 0 && asids->mt_asid_gen !=
+			  gru->gs_asid_gen)) {
 		asid = gru_assign_asid(gru);
 		asids->mt_asid = asid;
 		asids->mt_asid_gen = gru->gs_asid_gen;
@@ -233,6 +235,7 @@ static int gru_load_mm_tracker(struct gru_state *gru, struct gru_mm_struct *gms,
 	} else {
 		STAT(asid_reuse);
 	}
+	spin_unlock(&gru->gs_asid_lock);
 
 	BUG_ON(asids->mt_ctxbitmap & ctxbitmap);
 	asids->mt_ctxbitmap |= ctxbitmap;
@@ -241,24 +244,28 @@ static int gru_load_mm_tracker(struct gru_state *gru, struct gru_mm_struct *gms,
 	spin_unlock(&gms->ms_asid_lock);
 
 	gru_dbg(grudev,
-		"gru %x, gms %p, ctxnum 0x%d, asid 0x%x, asidmap 0x%lx\n",
-		gru->gs_gid, gms, ctxnum, asid, gms->ms_asidmap[0]);
+		"gid %d, gts %p, gms %p, ctxnum %d, asid 0x%x, asidmap 0x%lx\n",
+		gru->gs_gid, gts, gms, gts->ts_ctxnum, asid,
+		gms->ms_asidmap[0]);
 	return asid;
 }
 
 static void gru_unload_mm_tracker(struct gru_state *gru,
-				  struct gru_mm_struct *gms, int ctxnum)
+					struct gru_thread_state *gts)
 {
+	struct gru_mm_struct *gms = gts->ts_gms;
 	struct gru_mm_tracker *asids;
 	unsigned short ctxbitmap;
 
 	asids = &gms->ms_asids[gru->gs_gid];
-	ctxbitmap = (1 << ctxnum);
+	ctxbitmap = (1 << gts->ts_ctxnum);
 	spin_lock(&gms->ms_asid_lock);
+	spin_lock(&gru->gs_asid_lock);
 	BUG_ON((asids->mt_ctxbitmap & ctxbitmap) != ctxbitmap);
 	asids->mt_ctxbitmap ^= ctxbitmap;
-	gru_dbg(grudev, "gru %x, gms %p, ctxnum 0x%d, asidmap 0x%lx\n",
-		gru->gs_gid, gms, ctxnum, gms->ms_asidmap[0]);
+	gru_dbg(grudev, "gid %d, gts %p, gms %p, ctxnum 0x%d, asidmap 0x%lx\n",
+		gru->gs_gid, gts, gms, gts->ts_ctxnum, gms->ms_asidmap[0]);
+	spin_unlock(&gru->gs_asid_lock);
 	spin_unlock(&gms->ms_asid_lock);
 }
 
@@ -319,6 +326,7 @@ static struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma,
 	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;
 
@@ -399,7 +407,7 @@ static void gru_free_gru_context(struct gru_thread_state *gts)
 	struct gru_state *gru;
 
 	gru = gts->ts_gru;
-	gru_dbg(grudev, "gts %p, gru %p\n", gts, gru);
+	gru_dbg(grudev, "gts %p, gid %d\n", gts, gru->gs_gid);
 
 	spin_lock(&gru->gs_lock);
 	gru->gs_gts[gts->ts_ctxnum] = NULL;
@@ -408,6 +416,7 @@ static void gru_free_gru_context(struct gru_thread_state *gts)
 	__clear_bit(gts->ts_ctxnum, &gru->gs_context_map);
 	gts->ts_ctxnum = NULLCTX;
 	gts->ts_gru = NULL;
+	gts->ts_blade = -1;
 	spin_unlock(&gru->gs_lock);
 
 	gts_drop(gts);
@@ -432,8 +441,8 @@ static inline long gru_copy_handle(void *d, void *s)
 	return GRU_HANDLE_BYTES;
 }
 
-static void gru_prefetch_context(void *gseg, void *cb, void *cbe, unsigned long cbrmap,
-				unsigned long length)
+static void gru_prefetch_context(void *gseg, void *cb, void *cbe,
+				unsigned long cbrmap, unsigned long length)
 {
 	int i, scr;
 
@@ -500,12 +509,12 @@ void gru_unload_context(struct gru_thread_state *gts, int savestate)
 	zap_vma_ptes(gts->ts_vma, UGRUADDR(gts), GRU_GSEG_PAGESIZE);
 	cch = get_cch(gru->gs_gru_base_vaddr, ctxnum);
 
+	gru_dbg(grudev, "gts %p\n", gts);
 	lock_cch_handle(cch);
 	if (cch_interrupt_sync(cch))
 		BUG();
-	gru_dbg(grudev, "gts %p\n", gts);
 
-	gru_unload_mm_tracker(gru, gts->ts_gms, gts->ts_ctxnum);
+	gru_unload_mm_tracker(gru, gts);
 	if (savestate)
 		gru_unload_context_data(gts->ts_gdata, gru->gs_gru_base_vaddr,
 					ctxnum, gts->ts_cbr_map,
@@ -534,7 +543,7 @@ static void gru_load_context(struct gru_thread_state *gts)
 	cch = get_cch(gru->gs_gru_base_vaddr, ctxnum);
 
 	lock_cch_handle(cch);
-	asid = gru_load_mm_tracker(gru, gts->ts_gms, gts->ts_ctxnum);
+	asid = gru_load_mm_tracker(gru, gts);
 	cch->tfm_fault_bit_enable =
 	    (gts->ts_user_options == GRU_OPT_MISS_FMM_POLL
 	     || gts->ts_user_options == GRU_OPT_MISS_FMM_INTR);
@@ -544,7 +553,8 @@ static void gru_load_context(struct gru_thread_state *gts)
 		cch->tlb_int_select = gts->ts_tlb_int_select;
 	}
 	cch->tfm_done_bit_enable = 0;
-	err = cch_allocate(cch, asid, gts->ts_cbr_map, gts->ts_dsr_map);
+	err = cch_allocate(cch, asid, gts->ts_sizeavail, gts->ts_cbr_map,
+				gts->ts_dsr_map);
 	if (err) {
 		gru_dbg(grudev,
 			"err %d: cch %p, gts %p, cbr 0x%lx, dsr 0x%lx\n",
@@ -565,11 +575,12 @@ static void gru_load_context(struct gru_thread_state *gts)
 /*
  * Update fields in an active CCH:
  * 	- retarget interrupts on local blade
+ * 	- update sizeavail mask
  * 	- force a delayed context unload by clearing the CCH asids. This
  * 	  forces TLB misses for new GRU instructions. The context is unloaded
  * 	  when the next TLB miss occurs.
  */
-static int gru_update_cch(struct gru_thread_state *gts, int int_select)
+int gru_update_cch(struct gru_thread_state *gts, int force_unload)
 {
 	struct gru_context_configuration_handle *cch;
 	struct gru_state *gru = gts->ts_gru;
@@ -583,9 +594,11 @@ static int gru_update_cch(struct gru_thread_state *gts, int int_select)
 			goto exit;
 		if (cch_interrupt(cch))
 			BUG();
-		if (int_select >= 0) {
-			gts->ts_tlb_int_select = int_select;
-			cch->tlb_int_select = int_select;
+		if (!force_unload) {
+			for (i = 0; i < 8; i++)
+				cch->sizeavail[i] = gts->ts_sizeavail;
+			gts->ts_tlb_int_select = gru_cpu_fault_map_id();
+			cch->tlb_int_select = gru_cpu_fault_map_id();
 		} else {
 			for (i = 0; i < 8; i++)
 				cch->asid[i] = 0;
@@ -617,7 +630,7 @@ static int gru_retarget_intr(struct gru_thread_state *gts)
 
 	gru_dbg(grudev, "retarget from %d to %d\n", gts->ts_tlb_int_select,
 		gru_cpu_fault_map_id());
-	return gru_update_cch(gts, gru_cpu_fault_map_id());
+	return gru_update_cch(gts, 0);
 }
 
 
@@ -688,7 +701,7 @@ static void gru_steal_context(struct gru_thread_state *gts)
 		STAT(steal_context_failed);
 	}
 	gru_dbg(grudev,
-		"stole gru %x, ctxnum %d from gts %p. Need cb %d, ds %d;"
+		"stole gid %d, ctxnum %d from gts %p. Need cb %d, ds %d;"
 		" avail cb %ld, ds %ld\n",
 		gru->gs_gid, ctxnum, ngts, cbr, dsr, hweight64(gru->gs_cbr_map),
 		hweight64(gru->gs_dsr_map));
@@ -727,6 +740,7 @@ again:
 		}
 		reserve_gru_resources(gru, gts);
 		gts->ts_gru = gru;
+		gts->ts_blade = gru->gs_blade_id;
 		gts->ts_ctxnum =
 		    find_first_zero_bit(&gru->gs_context_map, GRU_NUM_CCH);
 		BUG_ON(gts->ts_ctxnum == GRU_NUM_CCH);
@@ -737,7 +751,7 @@ again:
 
 		STAT(assign_context);
 		gru_dbg(grudev,
-			"gseg %p, gts %p, gru %x, ctx %d, cbr %d, dsr %d\n",
+			"gseg %p, gts %p, gid %d, ctx %d, cbr %d, dsr %d\n",
 			gseg_virtual_address(gts->ts_gru, gts->ts_ctxnum), gts,
 			gts->ts_gru->gs_gid, gts->ts_ctxnum,
 			gts->ts_cbr_au_count, gts->ts_dsr_au_count);
@@ -773,8 +787,8 @@ int gru_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 		return VM_FAULT_SIGBUS;
 
 again:
-	preempt_disable();
 	mutex_lock(&gts->ts_ctxlock);
+	preempt_disable();
 	if (gts->ts_gru) {
 		if (gts->ts_gru->gs_blade_id != uv_numa_blade_id()) {
 			STAT(migrated_nopfn_unload);