Pull update-tlbflush-sn into release branch (df080e7c) · Commits · e / devices / android_kernel_sony_msm8998

arch/ia64/sn/kernel/sn2/sn2_smp.c

+75 −121

Original line number	Diff line number	Diff line
		@@ -5,7 +5,7 @@
		* License. See the file "COPYING" in the main directory of this archive
		* for more details.
		*
		* Copyright (C) 2000-2005 Silicon Graphics, Inc. All rights reserved.
		* Copyright (C) 2000-2006 Silicon Graphics, Inc. All rights reserved.
		*/

		#include <linux/init.h>
		@@ -46,104 +46,28 @@ DECLARE_PER_CPU(struct ptc_stats, ptcstats);

		static __cacheline_aligned DEFINE_SPINLOCK(sn2_global_ptc_lock);

		void sn2_ptc_deadlock_recovery(short , short, int, volatile unsigned long , unsigned long data0,
		volatile unsigned long *, unsigned long data1);
		void sn2_ptc_deadlock_recovery(short , short, short, int, volatile unsigned long , unsigned long,
		volatile unsigned long *, unsigned long);

		#ifdef DEBUG_PTC
		/*
		* ptctest:
		*
		* xyz - 3 digit hex number:
		* x - Force PTC purges to use shub:
		* 0 - no force
		* 1 - force
		* y - interupt enable
		* 0 - disable interrupts
		* 1 - leave interuupts enabled
		* z - type of lock:
		* 0 - global lock
		* 1 - node local lock
		* 2 - no lock
		*
		* Note: on shub1, only ptctest == 0 is supported. Don't try other values!
		* Note: some is the following is captured here to make degugging easier
		* (the macros make more sense if you see the debug patch - not posted)
		*/

		static unsigned int sn2_ptctest = 0;

		static int __init ptc_test(char *str)
		{
		get_option(&str, &sn2_ptctest);
		return 1;
		}
		__setup("ptctest=", ptc_test);

		static inline int ptc_lock(unsigned long *flagp)
		{
		unsigned long opt = sn2_ptctest & 255;

		switch (opt) {
		case 0x00:
		spin_lock_irqsave(&sn2_global_ptc_lock, *flagp);
		break;
		case 0x01:
		spin_lock_irqsave(&sn_nodepda->ptc_lock, *flagp);
		break;
		case 0x02:
		local_irq_save(*flagp);
		break;
		case 0x10:
		spin_lock(&sn2_global_ptc_lock);
		break;
		case 0x11:
		spin_lock(&sn_nodepda->ptc_lock);
		break;
		case 0x12:
		break;
		default:
		BUG();
		}
		return opt;
		}

		static inline void ptc_unlock(unsigned long flags, int opt)
		{
		switch (opt) {
		case 0x00:
		spin_unlock_irqrestore(&sn2_global_ptc_lock, flags);
		break;
		case 0x01:
		spin_unlock_irqrestore(&sn_nodepda->ptc_lock, flags);
		break;
		case 0x02:
		local_irq_restore(flags);
		break;
		case 0x10:
		spin_unlock(&sn2_global_ptc_lock);
		break;
		case 0x11:
		spin_unlock(&sn_nodepda->ptc_lock);
		break;
		case 0x12:
		break;
		default:
		BUG();
		}
		}
		#else

		#define sn2_ptctest 0
		#define local_node_uses_ptc_ga(sh1) ((sh1) ? 1 : 0)
		#define max_active_pio(sh1) ((sh1) ? 32 : 7)
		#define reset_max_active_on_deadlock() 1
		#define PTC_LOCK(sh1) ((sh1) ? &sn2_global_ptc_lock : &sn_nodepda->ptc_lock)

		static inline int ptc_lock(unsigned long *flagp)
		static inline void ptc_lock(int sh1, unsigned long *flagp)
		{
		spin_lock_irqsave(&sn2_global_ptc_lock, *flagp);
		return 0;
		spin_lock_irqsave(PTC_LOCK(sh1), *flagp);
		}

		static inline void ptc_unlock(unsigned long flags, int opt)
		static inline void ptc_unlock(int sh1, unsigned long flags)
		{
		spin_unlock_irqrestore(&sn2_global_ptc_lock, flags);
		spin_unlock_irqrestore(PTC_LOCK(sh1), flags);
		}
		#endif

		struct ptc_stats {
		unsigned long ptc_l;
		@@ -151,27 +75,30 @@ struct ptc_stats {
		unsigned long shub_ptc_flushes;
		unsigned long nodes_flushed;
		unsigned long deadlocks;
		unsigned long deadlocks2;
		unsigned long lock_itc_clocks;
		unsigned long shub_itc_clocks;
		unsigned long shub_itc_clocks_max;
		unsigned long shub_ptc_flushes_not_my_mm;
		};

		static inline unsigned long wait_piowc(void)
		{
		volatile unsigned long *piows, zeroval;
		unsigned long ws;
		volatile unsigned long *piows;
		unsigned long zeroval, ws;

		piows = pda->pio_write_status_addr;
		zeroval = pda->pio_write_status_val;
		do {
		cpu_relax();
		} while (((ws = *piows) & SH_PIO_WRITE_STATUS_PENDING_WRITE_COUNT_MASK) != zeroval);
		return ws;
		return (ws & SH_PIO_WRITE_STATUS_WRITE_DEADLOCK_MASK) != 0;
		}

		void sn_tlb_migrate_finish(struct mm_struct *mm)
		{
		if (mm == current->mm)
		/* flush_tlb_mm is inefficient if more than 1 users of mm */
		if (mm == current->mm && mm && atomic_read(&mm->mm_users) == 1)
		flush_tlb_mm(mm);
		}

		@@ -201,12 +128,14 @@ void
		sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
		unsigned long end, unsigned long nbits)
		{
		int i, opt, shub1, cnode, mynasid, cpu, lcpu = 0, nasid, flushed = 0;
		int mymm = (mm == current->active_mm && current->mm);
		int i, ibegin, shub1, cnode, mynasid, cpu, lcpu = 0, nasid;
		int mymm = (mm == current->active_mm && mm == current->mm);
		int use_cpu_ptcga;
		volatile unsigned long ptc0, ptc1;
		unsigned long itc, itc2, flags, data0 = 0, data1 = 0, rr_value;
		unsigned long itc, itc2, flags, data0 = 0, data1 = 0, rr_value, old_rr = 0;
		short nasids[MAX_NUMNODES], nix;
		nodemask_t nodes_flushed;
		int active, max_active, deadlock;

		nodes_clear(nodes_flushed);
		i = 0;
		@@ -267,41 +196,56 @@ sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,


		mynasid = get_nasid();
		use_cpu_ptcga = local_node_uses_ptc_ga(shub1);
		max_active = max_active_pio(shub1);

		itc = ia64_get_itc();
		opt = ptc_lock(&flags);
		ptc_lock(shub1, &flags);
		itc2 = ia64_get_itc();

		__get_cpu_var(ptcstats).lock_itc_clocks += itc2 - itc;
		__get_cpu_var(ptcstats).shub_ptc_flushes++;
		__get_cpu_var(ptcstats).nodes_flushed += nix;
		if (!mymm)
		__get_cpu_var(ptcstats).shub_ptc_flushes_not_my_mm++;

		if (use_cpu_ptcga && !mymm) {
		old_rr = ia64_get_rr(start);
		ia64_set_rr(start, (old_rr & 0xff) \| (rr_value << 8));
		ia64_srlz_d();
		}

		wait_piowc();
		do {
		if (shub1)
		data1 = start \| (1UL << SH1_PTC_1_START_SHFT);
		else
		data0 = (data0 & ~SH2_PTC_ADDR_MASK) \| (start & SH2_PTC_ADDR_MASK);
		for (i = 0; i < nix; i++) {
		deadlock = 0;
		active = 0;
		for (ibegin = 0, i = 0; i < nix; i++) {
		nasid = nasids[i];
		if ((!(sn2_ptctest & 3)) && unlikely(nasid == mynasid && mymm)) {
		if (use_cpu_ptcga && unlikely(nasid == mynasid)) {
		ia64_ptcga(start, nbits << 2);
		ia64_srlz_i();
		} else {
		ptc0 = CHANGE_NASID(nasid, ptc0);
		if (ptc1)
		ptc1 = CHANGE_NASID(nasid, ptc1);
		pio_atomic_phys_write_mmrs(ptc0, data0, ptc1,
		data1);
		flushed = 1;
		pio_atomic_phys_write_mmrs(ptc0, data0, ptc1, data1);
		active++;
		}
		if (active >= max_active \|\| i == (nix - 1)) {
		if ((deadlock = wait_piowc())) {
		sn2_ptc_deadlock_recovery(nasids, ibegin, i, mynasid, ptc0, data0, ptc1, data1);
		if (reset_max_active_on_deadlock())
		max_active = 1;
		}
		active = 0;
		ibegin = i + 1;
		}
		if (flushed
		&& (wait_piowc() &
		(SH_PIO_WRITE_STATUS_WRITE_DEADLOCK_MASK))) {
		sn2_ptc_deadlock_recovery(nasids, nix, mynasid, ptc0, data0, ptc1, data1);
		}

		start += (1UL << nbits);

		} while (start < end);

		itc2 = ia64_get_itc() - itc2;
		@@ -309,7 +253,12 @@ sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
		if (itc2 > __get_cpu_var(ptcstats).shub_itc_clocks_max)
		__get_cpu_var(ptcstats).shub_itc_clocks_max = itc2;

		ptc_unlock(flags, opt);
		if (old_rr) {
		ia64_set_rr(start, old_rr);
		ia64_srlz_d();
		}

		ptc_unlock(shub1, flags);

		preempt_enable();
		}
		@@ -321,27 +270,30 @@ sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
		* TLB flush transaction. The recovery sequence is somewhat tricky & is
		* coded in assembly language.
		*/
		void sn2_ptc_deadlock_recovery(short nasids, short nix, int mynasid, volatile unsigned long ptc0, unsigned long data0,
		void sn2_ptc_deadlock_recovery(short nasids, short ib, short ie, int mynasid, volatile unsigned long ptc0, unsigned long data0,
		volatile unsigned long *ptc1, unsigned long data1)
		{
		extern void sn2_ptc_deadlock_recovery_core(volatile unsigned long *, unsigned long,
		extern unsigned long sn2_ptc_deadlock_recovery_core(volatile unsigned long *, unsigned long,
		volatile unsigned long , unsigned long, volatile unsigned long , unsigned long);
		short nasid, i;
		unsigned long *piows, zeroval;
		unsigned long *piows, zeroval, n;

		__get_cpu_var(ptcstats).deadlocks++;

		piows = (unsigned long *) pda->pio_write_status_addr;
		zeroval = pda->pio_write_status_val;

		for (i=0; i < nix; i++) {

		for (i=ib; i <= ie; i++) {
		nasid = nasids[i];
		if (!(sn2_ptctest & 3) && nasid == mynasid)
		if (local_node_uses_ptc_ga(is_shub1()) && nasid == mynasid)
		continue;
		ptc0 = CHANGE_NASID(nasid, ptc0);
		if (ptc1)
		ptc1 = CHANGE_NASID(nasid, ptc1);
		sn2_ptc_deadlock_recovery_core(ptc0, data0, ptc1, data1, piows, zeroval);

		n = sn2_ptc_deadlock_recovery_core(ptc0, data0, ptc1, data1, piows, zeroval);
		__get_cpu_var(ptcstats).deadlocks2 += n;
		}

		}
		@@ -452,20 +404,22 @@ static int sn2_ptc_seq_show(struct seq_file file, void data)
		cpu = (loff_t ) data;

		if (!cpu) {
		seq_printf(file, "# ptc_l change_rid shub_ptc_flushes shub_nodes_flushed deadlocks lock_nsec shub_nsec shub_nsec_max\n");
		seq_printf(file,
		"# cpu ptc_l newrid ptc_flushes nodes_flushed deadlocks lock_nsec shub_nsec shub_nsec_max not_my_mm deadlock2\n");
		seq_printf(file, "# ptctest %d\n", sn2_ptctest);
		}

		if (cpu < NR_CPUS && cpu_online(cpu)) {
		stat = &per_cpu(ptcstats, cpu);
		seq_printf(file, "cpu %d %ld %ld %ld %ld %ld %ld %ld %ld\n", cpu, stat->ptc_l,
		seq_printf(file, "cpu %d %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld\n", cpu, stat->ptc_l,
		stat->change_rid, stat->shub_ptc_flushes, stat->nodes_flushed,
		stat->deadlocks,
		1000 * stat->lock_itc_clocks / per_cpu(cpu_info, cpu).cyc_per_usec,
		1000 * stat->shub_itc_clocks / per_cpu(cpu_info, cpu).cyc_per_usec,
		1000 * stat->shub_itc_clocks_max / per_cpu(cpu_info, cpu).cyc_per_usec);
		1000 * stat->shub_itc_clocks_max / per_cpu(cpu_info, cpu).cyc_per_usec,
		stat->shub_ptc_flushes_not_my_mm,
		stat->deadlocks2);
		}

		return 0;
		}

		@@ -476,7 +430,7 @@ static struct seq_operations sn2_ptc_seq_ops = {
		.show = sn2_ptc_seq_show
		};

		int sn2_ptc_proc_open(struct inode inode, struct file file)
		static int sn2_ptc_proc_open(struct inode inode, struct file file)
		{
		return seq_open(file, &sn2_ptc_seq_ops);
		}