arch/x86/kernel/genx2apic_uv_x.c - arm/linux-arm64-legacy - Git at Google

 /*
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
  * SGI UV APIC functions (note: not an Intel compatible APIC)
  *
  * Copyright (C) 2007 Silicon Graphics, Inc. All rights reserved.
  */

 #include <linux/threads.h>
 #include <linux/cpumask.h>
 #include <linux/string.h>
 #include <linux/kernel.h>
 #include <linux/ctype.h>
 #include <linux/init.h>
 #include <linux/sched.h>
 #include <linux/bootmem.h>
 #include <linux/module.h>
 #include <asm/smp.h>
 #include <asm/ipi.h>
 #include <asm/genapic.h>
 #include <asm/uv/uv_mmrs.h>
 #include <asm/uv/uv_hub.h>

 DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
 EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);

 struct uv_blade_info *uv_blade_info;
 EXPORT_SYMBOL_GPL(uv_blade_info);

 short *uv_node_to_blade;
 EXPORT_SYMBOL_GPL(uv_node_to_blade);

 short *uv_cpu_to_blade;
 EXPORT_SYMBOL_GPL(uv_cpu_to_blade);

 short uv_possible_blades;
 EXPORT_SYMBOL_GPL(uv_possible_blades);

 /* Start with all IRQs pointing to boot CPU.  IRQ balancing will shift them. */

 static cpumask_t uv_target_cpus(void)
 {
 	return cpumask_of_cpu(0);
 }

 static cpumask_t uv_vector_allocation_domain(int cpu)
 {
 	cpumask_t domain = CPU_MASK_NONE;
 	cpu_set(cpu, domain);
 	return domain;
 }

 int uv_wakeup_secondary(int phys_apicid, unsigned int start_rip)
 {
 	unsigned long val;
 	int nasid;

 	nasid = uv_apicid_to_nasid(phys_apicid);
 	val = (1UL << UVH_IPI_INT_SEND_SHFT) |
 	    (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
 	    (((long)start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
 	    (6 << UVH_IPI_INT_DELIVERY_MODE_SHFT);
 	uv_write_global_mmr64(nasid, UVH_IPI_INT, val);
 	return 0;
 }

 static void uv_send_IPI_one(int cpu, int vector)
 {
 	unsigned long val, apicid;
 	int nasid;

 	apicid = per_cpu(x86_cpu_to_apicid, cpu); /* ZZZ - cache node-local ? */
 	nasid = uv_apicid_to_nasid(apicid);
 	val =
 	    (1UL << UVH_IPI_INT_SEND_SHFT) | (apicid <<
 					      UVH_IPI_INT_APIC_ID_SHFT) |
 	    (vector << UVH_IPI_INT_VECTOR_SHFT);
 	uv_write_global_mmr64(nasid, UVH_IPI_INT, val);
 	printk(KERN_DEBUG
 	     "UV: IPI to cpu %d, apicid 0x%lx, vec %d, nasid%d, val 0x%lx\n",
 	     cpu, apicid, vector, nasid, val);
 }

 static void uv_send_IPI_mask(cpumask_t mask, int vector)
 {
 	unsigned int cpu;

 	for (cpu = 0; cpu < NR_CPUS; ++cpu)
 		if (cpu_isset(cpu, mask))
 			uv_send_IPI_one(cpu, vector);
 }

 static void uv_send_IPI_allbutself(int vector)
 {
 	cpumask_t mask = cpu_online_map;

 	cpu_clear(smp_processor_id(), mask);

 	if (!cpus_empty(mask))
 		uv_send_IPI_mask(mask, vector);
 }

 static void uv_send_IPI_all(int vector)
 {
 	uv_send_IPI_mask(cpu_online_map, vector);
 }

 static int uv_apic_id_registered(void)
 {
 	return 1;
 }

 static unsigned int uv_cpu_mask_to_apicid(cpumask_t cpumask)
 {
 	int cpu;

 	/*
 	 * We're using fixed IRQ delivery, can only return one phys APIC ID.
 	 * May as well be the first.
 	 */
 	cpu = first_cpu(cpumask);
 	if ((unsigned)cpu < NR_CPUS)
 		return per_cpu(x86_cpu_to_apicid, cpu);
 	else
 		return BAD_APICID;
 }

 static unsigned int phys_pkg_id(int index_msb)
 {
 	return GET_APIC_ID(read_apic_id()) >> index_msb;
 }

 #ifdef ZZZ		/* Needs x2apic patch */
 static void uv_send_IPI_self(int vector)
 {
 	apic_write(APIC_SELF_IPI, vector);
 }
 #endif

 struct genapic apic_x2apic_uv_x = {
 	.name = "UV large system",
 	.int_delivery_mode = dest_Fixed,
 	.int_dest_mode = (APIC_DEST_PHYSICAL != 0),
 	.target_cpus = uv_target_cpus,
 	.vector_allocation_domain = uv_vector_allocation_domain,/* Fixme ZZZ */
 	.apic_id_registered = uv_apic_id_registered,
 	.send_IPI_all = uv_send_IPI_all,
 	.send_IPI_allbutself = uv_send_IPI_allbutself,
 	.send_IPI_mask = uv_send_IPI_mask,
 	/* ZZZ.send_IPI_self = uv_send_IPI_self, */
 	.cpu_mask_to_apicid = uv_cpu_mask_to_apicid,
 	.phys_pkg_id = phys_pkg_id,	/* Fixme ZZZ */
 };

 static __cpuinit void set_x2apic_extra_bits(int nasid)
 {
 	__get_cpu_var(x2apic_extra_bits) = ((nasid >> 1) << 6);
 }

 /*
  * Called on boot cpu.
  */
 static __init void uv_system_init(void)
 {
 	union uvh_si_addr_map_config_u m_n_config;
 	int bytes, nid, cpu, lcpu, nasid, last_nasid, blade;
 	unsigned long mmr_base;

 	m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
 	mmr_base =
 	    uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
 	    ~UV_MMR_ENABLE;
 	printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);

 	last_nasid = -1;
 	for_each_possible_cpu(cpu) {
 		nid = cpu_to_node(cpu);
 		nasid = uv_apicid_to_nasid(per_cpu(x86_cpu_to_apicid, cpu));
 		if (nasid != last_nasid)
 			uv_possible_blades++;
 		last_nasid = nasid;
 	}
 	printk(KERN_DEBUG "UV: Found %d blades\n", uv_num_possible_blades());

 	bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
 	uv_blade_info = alloc_bootmem_pages(bytes);

 	bytes = sizeof(uv_node_to_blade[0]) * num_possible_nodes();
 	uv_node_to_blade = alloc_bootmem_pages(bytes);
 	memset(uv_node_to_blade, 255, bytes);

 	bytes = sizeof(uv_cpu_to_blade[0]) * num_possible_cpus();
 	uv_cpu_to_blade = alloc_bootmem_pages(bytes);
 	memset(uv_cpu_to_blade, 255, bytes);

 	last_nasid = -1;
 	blade = -1;
 	lcpu = -1;
 	for_each_possible_cpu(cpu) {
 		nid = cpu_to_node(cpu);
 		nasid = uv_apicid_to_nasid(per_cpu(x86_cpu_to_apicid, cpu));
 		if (nasid != last_nasid) {
 			blade++;
 			lcpu = -1;
 			uv_blade_info[blade].nr_posible_cpus = 0;
 			uv_blade_info[blade].nr_online_cpus = 0;
 		}
 		last_nasid = nasid;
 		lcpu++;

 		uv_cpu_hub_info(cpu)->m_val = m_n_config.s.m_skt;
 		uv_cpu_hub_info(cpu)->n_val = m_n_config.s.n_skt;
 		uv_cpu_hub_info(cpu)->numa_blade_id = blade;
 		uv_cpu_hub_info(cpu)->blade_processor_id = lcpu;
 		uv_cpu_hub_info(cpu)->local_nasid = nasid;
 		uv_cpu_hub_info(cpu)->gnode_upper =
 		    nasid & ~((1 << uv_hub_info->n_val) - 1);
 		uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
 		uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */
 		uv_blade_info[blade].nasid = nasid;
 		uv_blade_info[blade].nr_posible_cpus++;
 		uv_node_to_blade[nid] = blade;
 		uv_cpu_to_blade[cpu] = blade;

 		printk(KERN_DEBUG "UV cpu %d, apicid 0x%x, nasid %d, nid %d\n",
 		       cpu, per_cpu(x86_cpu_to_apicid, cpu), nasid, nid);
 		printk(KERN_DEBUG "UV   lcpu %d, blade %d\n", lcpu, blade);
 	}
 }

 /*
  * Called on each cpu to initialize the per_cpu UV data area.
  */
 void __cpuinit uv_cpu_init(void)
 {
 	if (!uv_node_to_blade)
 		uv_system_init();

 	uv_blade_info[uv_numa_blade_id()].nr_online_cpus++;

 	if (get_uv_system_type() == UV_NON_UNIQUE_APIC)
 		set_x2apic_extra_bits(uv_hub_info->local_nasid);
 }
	/*
	* This file is subject to the terms and conditions of the GNU General Public
	* License. See the file "COPYING" in the main directory of this archive
	* for more details.
	*
	* SGI UV APIC functions (note: not an Intel compatible APIC)
	*
	* Copyright (C) 2007 Silicon Graphics, Inc. All rights reserved.
	*/

	#include <linux/threads.h>
	#include <linux/cpumask.h>
	#include <linux/string.h>
	#include <linux/kernel.h>
	#include <linux/ctype.h>
	#include <linux/init.h>
	#include <linux/sched.h>
	#include <linux/bootmem.h>
	#include <linux/module.h>
	#include <asm/smp.h>
	#include <asm/ipi.h>
	#include <asm/genapic.h>
	#include <asm/uv/uv_mmrs.h>
	#include <asm/uv/uv_hub.h>

	DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
	EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);

	struct uv_blade_info *uv_blade_info;
	EXPORT_SYMBOL_GPL(uv_blade_info);

	short *uv_node_to_blade;
	EXPORT_SYMBOL_GPL(uv_node_to_blade);

	short *uv_cpu_to_blade;
	EXPORT_SYMBOL_GPL(uv_cpu_to_blade);

	short uv_possible_blades;
	EXPORT_SYMBOL_GPL(uv_possible_blades);

	/* Start with all IRQs pointing to boot CPU. IRQ balancing will shift them. */

	static cpumask_t uv_target_cpus(void)
	{
	return cpumask_of_cpu(0);
	}

	static cpumask_t uv_vector_allocation_domain(int cpu)
	{
	cpumask_t domain = CPU_MASK_NONE;
	cpu_set(cpu, domain);
	return domain;
	}

	int uv_wakeup_secondary(int phys_apicid, unsigned int start_rip)
	{
	unsigned long val;
	int nasid;

	nasid = uv_apicid_to_nasid(phys_apicid);
	val = (1UL << UVH_IPI_INT_SEND_SHFT) \|
	(phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) \|
	(((long)start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) \|
	(6 << UVH_IPI_INT_DELIVERY_MODE_SHFT);
	uv_write_global_mmr64(nasid, UVH_IPI_INT, val);
	return 0;
	}

	static void uv_send_IPI_one(int cpu, int vector)
	{
	unsigned long val, apicid;
	int nasid;

	apicid = per_cpu(x86_cpu_to_apicid, cpu); /* ZZZ - cache node-local ? */
	nasid = uv_apicid_to_nasid(apicid);
	val =
	(1UL << UVH_IPI_INT_SEND_SHFT) \| (apicid <<
	UVH_IPI_INT_APIC_ID_SHFT) \|
	(vector << UVH_IPI_INT_VECTOR_SHFT);
	uv_write_global_mmr64(nasid, UVH_IPI_INT, val);
	printk(KERN_DEBUG
	"UV: IPI to cpu %d, apicid 0x%lx, vec %d, nasid%d, val 0x%lx\n",
	cpu, apicid, vector, nasid, val);
	}

	static void uv_send_IPI_mask(cpumask_t mask, int vector)
	{
	unsigned int cpu;

	for (cpu = 0; cpu < NR_CPUS; ++cpu)
	if (cpu_isset(cpu, mask))
	uv_send_IPI_one(cpu, vector);
	}

	static void uv_send_IPI_allbutself(int vector)
	{
	cpumask_t mask = cpu_online_map;

	cpu_clear(smp_processor_id(), mask);

	if (!cpus_empty(mask))
	uv_send_IPI_mask(mask, vector);
	}

	static void uv_send_IPI_all(int vector)
	{
	uv_send_IPI_mask(cpu_online_map, vector);
	}

	static int uv_apic_id_registered(void)
	{
	return 1;
	}

	static unsigned int uv_cpu_mask_to_apicid(cpumask_t cpumask)
	{
	int cpu;

	/*
	* We're using fixed IRQ delivery, can only return one phys APIC ID.
	* May as well be the first.
	*/
	cpu = first_cpu(cpumask);
	if ((unsigned)cpu < NR_CPUS)
	return per_cpu(x86_cpu_to_apicid, cpu);
	else
	return BAD_APICID;
	}

	static unsigned int phys_pkg_id(int index_msb)
	{
	return GET_APIC_ID(read_apic_id()) >> index_msb;
	}

	#ifdef ZZZ /* Needs x2apic patch */
	static void uv_send_IPI_self(int vector)
	{
	apic_write(APIC_SELF_IPI, vector);
	}
	#endif

	struct genapic apic_x2apic_uv_x = {
	.name = "UV large system",
	.int_delivery_mode = dest_Fixed,
	.int_dest_mode = (APIC_DEST_PHYSICAL != 0),
	.target_cpus = uv_target_cpus,
	.vector_allocation_domain = uv_vector_allocation_domain,/* Fixme ZZZ */
	.apic_id_registered = uv_apic_id_registered,
	.send_IPI_all = uv_send_IPI_all,
	.send_IPI_allbutself = uv_send_IPI_allbutself,
	.send_IPI_mask = uv_send_IPI_mask,
	/* ZZZ.send_IPI_self = uv_send_IPI_self, */
	.cpu_mask_to_apicid = uv_cpu_mask_to_apicid,
	.phys_pkg_id = phys_pkg_id, /* Fixme ZZZ */
	};

	static __cpuinit void set_x2apic_extra_bits(int nasid)
	{
	__get_cpu_var(x2apic_extra_bits) = ((nasid >> 1) << 6);
	}

	/*
	* Called on boot cpu.
	*/
	static __init void uv_system_init(void)
	{
	union uvh_si_addr_map_config_u m_n_config;
	int bytes, nid, cpu, lcpu, nasid, last_nasid, blade;
	unsigned long mmr_base;

	m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
	mmr_base =
	uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
	~UV_MMR_ENABLE;
	printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);

	last_nasid = -1;
	for_each_possible_cpu(cpu) {
	nid = cpu_to_node(cpu);
	nasid = uv_apicid_to_nasid(per_cpu(x86_cpu_to_apicid, cpu));
	if (nasid != last_nasid)
	uv_possible_blades++;
	last_nasid = nasid;
	}
	printk(KERN_DEBUG "UV: Found %d blades\n", uv_num_possible_blades());

	bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
	uv_blade_info = alloc_bootmem_pages(bytes);

	bytes = sizeof(uv_node_to_blade[0]) * num_possible_nodes();
	uv_node_to_blade = alloc_bootmem_pages(bytes);
	memset(uv_node_to_blade, 255, bytes);

	bytes = sizeof(uv_cpu_to_blade[0]) * num_possible_cpus();
	uv_cpu_to_blade = alloc_bootmem_pages(bytes);
	memset(uv_cpu_to_blade, 255, bytes);

	last_nasid = -1;
	blade = -1;
	lcpu = -1;
	for_each_possible_cpu(cpu) {
	nid = cpu_to_node(cpu);
	nasid = uv_apicid_to_nasid(per_cpu(x86_cpu_to_apicid, cpu));
	if (nasid != last_nasid) {
	blade++;
	lcpu = -1;
	uv_blade_info[blade].nr_posible_cpus = 0;
	uv_blade_info[blade].nr_online_cpus = 0;
	}
	last_nasid = nasid;
	lcpu++;

	uv_cpu_hub_info(cpu)->m_val = m_n_config.s.m_skt;
	uv_cpu_hub_info(cpu)->n_val = m_n_config.s.n_skt;
	uv_cpu_hub_info(cpu)->numa_blade_id = blade;
	uv_cpu_hub_info(cpu)->blade_processor_id = lcpu;
	uv_cpu_hub_info(cpu)->local_nasid = nasid;
	uv_cpu_hub_info(cpu)->gnode_upper =
	nasid & ~((1 << uv_hub_info->n_val) - 1);
	uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
	uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */
	uv_blade_info[blade].nasid = nasid;
	uv_blade_info[blade].nr_posible_cpus++;
	uv_node_to_blade[nid] = blade;
	uv_cpu_to_blade[cpu] = blade;

	printk(KERN_DEBUG "UV cpu %d, apicid 0x%x, nasid %d, nid %d\n",
	cpu, per_cpu(x86_cpu_to_apicid, cpu), nasid, nid);
	printk(KERN_DEBUG "UV lcpu %d, blade %d\n", lcpu, blade);
	}
	}

	/*
	* Called on each cpu to initialize the per_cpu UV data area.
	*/
	void __cpuinit uv_cpu_init(void)
	{
	if (!uv_node_to_blade)
	uv_system_init();

	uv_blade_info[uv_numa_blade_id()].nr_online_cpus++;

	if (get_uv_system_type() == UV_NON_UNIQUE_APIC)
	set_x2apic_extra_bits(uv_hub_info->local_nasid);
	}