Merge branches 'release' and 'throttling-domains' into release (8976b6fd) · Commits · e / devices / android_kernel_sony_msm8994

arch/ia64/kernel/acpi-processor.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -45,6 +45,12 @@ static void init_intel_pdc(struct acpi_processor *pr)
		buf[0] = ACPI_PDC_REVISION_ID;
		buf[1] = 1;
		buf[2] = ACPI_PDC_EST_CAPABILITY_SMP;
		/*
		* The default of PDC_SMP_T_SWCOORD bit is set for IA64 cpu so
		* that OSPM is capable of native ACPI throttling software
		* coordination using BIOS supplied _TSD info.
		*/
		buf[2] \|= ACPI_PDC_SMP_T_SWCOORD;

		obj->type = ACPI_TYPE_BUFFER;
		obj->buffer.length = 12;

arch/x86/kernel/acpi/processor.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -46,6 +46,12 @@ static void init_intel_pdc(struct acpi_processor pr, struct cpuinfo_x86 c)
		buf[1] = 1;
		buf[2] = ACPI_PDC_C_CAPABILITY_SMP;

		/*
		* The default of PDC_SMP_T_SWCOORD bit is set for intel x86 cpu so
		* that OSPM is capable of native ACPI throttling software
		* coordination using BIOS supplied _TSD info.
		*/
		buf[2] \|= ACPI_PDC_SMP_T_SWCOORD;
		if (cpu_has(c, X86_FEATURE_EST))
		buf[2] \|= ACPI_PDC_EST_CAPABILITY_SWSMP;

drivers/acpi/processor_core.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1091,6 +1091,8 @@ static int __init acpi_processor_init(void)

		acpi_processor_ppc_init();

		acpi_processor_throttling_init();

		return 0;

		out_cpuidle:

drivers/acpi/processor_throttling.c

+340 −6

Original line number	Diff line number	Diff line
		@@ -45,9 +45,229 @@
		#define _COMPONENT ACPI_PROCESSOR_COMPONENT
		ACPI_MODULE_NAME("processor_throttling");

		struct throttling_tstate {
		unsigned int cpu; /* cpu nr */
		int target_state; /* target T-state */
		};

		#define THROTTLING_PRECHANGE (1)
		#define THROTTLING_POSTCHANGE (2)

		static int acpi_processor_get_throttling(struct acpi_processor *pr);
		int acpi_processor_set_throttling(struct acpi_processor *pr, int state);

		static int acpi_processor_update_tsd_coord(void)
		{
		int count, count_target;
		int retval = 0;
		unsigned int i, j;
		cpumask_t covered_cpus;
		struct acpi_processor pr, match_pr;
		struct acpi_tsd_package pdomain, match_pdomain;
		struct acpi_processor_throttling pthrottling, match_pthrottling;

		/*
		* Now that we have _TSD data from all CPUs, lets setup T-state
		* coordination between all CPUs.
		*/
		for_each_possible_cpu(i) {
		pr = processors[i];
		if (!pr)
		continue;

		/* Basic validity check for domain info */
		pthrottling = &(pr->throttling);

		/*
		* If tsd package for one cpu is invalid, the coordination
		* among all CPUs is thought as invalid.
		* Maybe it is ugly.
		*/
		if (!pthrottling->tsd_valid_flag) {
		retval = -EINVAL;
		break;
		}
		}
		if (retval)
		goto err_ret;

		cpus_clear(covered_cpus);
		for_each_possible_cpu(i) {
		pr = processors[i];
		if (!pr)
		continue;

		if (cpu_isset(i, covered_cpus))
		continue;
		pthrottling = &pr->throttling;

		pdomain = &(pthrottling->domain_info);
		cpu_set(i, pthrottling->shared_cpu_map);
		cpu_set(i, covered_cpus);
		/*
		* If the number of processor in the TSD domain is 1, it is
		* unnecessary to parse the coordination for this CPU.
		*/
		if (pdomain->num_processors <= 1)
		continue;

		/* Validate the Domain info */
		count_target = pdomain->num_processors;
		count = 1;

		for_each_possible_cpu(j) {
		if (i == j)
		continue;

		match_pr = processors[j];
		if (!match_pr)
		continue;

		match_pthrottling = &(match_pr->throttling);
		match_pdomain = &(match_pthrottling->domain_info);
		if (match_pdomain->domain != pdomain->domain)
		continue;

		/* Here i and j are in the same domain.
		* If two TSD packages have the same domain, they
		* should have the same num_porcessors and
		* coordination type. Otherwise it will be regarded
		* as illegal.
		*/
		if (match_pdomain->num_processors != count_target) {
		retval = -EINVAL;
		goto err_ret;
		}

		if (pdomain->coord_type != match_pdomain->coord_type) {
		retval = -EINVAL;
		goto err_ret;
		}

		cpu_set(j, covered_cpus);
		cpu_set(j, pthrottling->shared_cpu_map);
		count++;
		}
		for_each_possible_cpu(j) {
		if (i == j)
		continue;

		match_pr = processors[j];
		if (!match_pr)
		continue;

		match_pthrottling = &(match_pr->throttling);
		match_pdomain = &(match_pthrottling->domain_info);
		if (match_pdomain->domain != pdomain->domain)
		continue;

		/*
		* If some CPUS have the same domain, they
		* will have the same shared_cpu_map.
		*/
		match_pthrottling->shared_cpu_map =
		pthrottling->shared_cpu_map;
		}
		}

		err_ret:
		for_each_possible_cpu(i) {
		pr = processors[i];
		if (!pr)
		continue;

		/*
		* Assume no coordination on any error parsing domain info.
		* The coordination type will be forced as SW_ALL.
		*/
		if (retval) {
		pthrottling = &(pr->throttling);
		cpus_clear(pthrottling->shared_cpu_map);
		cpu_set(i, pthrottling->shared_cpu_map);
		pthrottling->shared_type = DOMAIN_COORD_TYPE_SW_ALL;
		}
		}

		return retval;
		}

		/*
		* Update the T-state coordination after the _TSD
		* data for all cpus is obtained.
		*/
		void acpi_processor_throttling_init(void)
		{
		if (acpi_processor_update_tsd_coord())
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
		"Assume no T-state coordination\n"));

		return;
		}

		static int acpi_processor_throttling_notifier(unsigned long event, void *data)
		{
		struct throttling_tstate *p_tstate = data;
		struct acpi_processor *pr;
		unsigned int cpu ;
		int target_state;
		struct acpi_processor_limit *p_limit;
		struct acpi_processor_throttling *p_throttling;

		cpu = p_tstate->cpu;
		pr = processors[cpu];
		if (!pr) {
		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Invalid pr pointer\n"));
		return 0;
		}
		if (!pr->flags.throttling) {
		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Throttling control is "
		"unsupported on CPU %d\n", cpu));
		return 0;
		}
		target_state = p_tstate->target_state;
		p_throttling = &(pr->throttling);
		switch (event) {
		case THROTTLING_PRECHANGE:
		/*
		* Prechange event is used to choose one proper t-state,
		* which meets the limits of thermal, user and _TPC.
		*/
		p_limit = &pr->limit;
		if (p_limit->thermal.tx > target_state)
		target_state = p_limit->thermal.tx;
		if (p_limit->user.tx > target_state)
		target_state = p_limit->user.tx;
		if (pr->throttling_platform_limit > target_state)
		target_state = pr->throttling_platform_limit;
		if (target_state >= p_throttling->state_count) {
		printk(KERN_WARNING
		"Exceed the limit of T-state \n");
		target_state = p_throttling->state_count - 1;
		}
		p_tstate->target_state = target_state;
		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "PreChange Event:"
		"target T-state of CPU %d is T%d\n",
		cpu, target_state));
		break;
		case THROTTLING_POSTCHANGE:
		/*
		* Postchange event is only used to update the
		* T-state flag of acpi_processor_throttling.
		*/
		p_throttling->state = target_state;
		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "PostChange Event:"
		"CPU %d is switched to T%d\n",
		cpu, target_state));
		break;
		default:
		printk(KERN_WARNING
		"Unsupported Throttling notifier event\n");
		break;
		}

		return 0;
		}

		/*
		* _TPC - Throttling Present Capabilities
		*/
		@@ -293,6 +513,10 @@ static int acpi_processor_get_tsd(struct acpi_processor *pr)
		struct acpi_buffer state = { 0, NULL };
		union acpi_object *tsd = NULL;
		struct acpi_tsd_package *pdomain;
		struct acpi_processor_throttling *pthrottling;

		pthrottling = &pr->throttling;
		pthrottling->tsd_valid_flag = 0;

		status = acpi_evaluate_object(pr->handle, "_TSD", NULL, &buffer);
		if (ACPI_FAILURE(status)) {
		@@ -340,6 +564,22 @@ static int acpi_processor_get_tsd(struct acpi_processor *pr)
		goto end;
		}

		pthrottling = &pr->throttling;
		pthrottling->tsd_valid_flag = 1;
		pthrottling->shared_type = pdomain->coord_type;
		cpu_set(pr->id, pthrottling->shared_cpu_map);
		/*
		* If the coordination type is not defined in ACPI spec,
		* the tsd_valid_flag will be clear and coordination type
		* will be forecd as DOMAIN_COORD_TYPE_SW_ALL.
		*/
		if (pdomain->coord_type != DOMAIN_COORD_TYPE_SW_ALL &&
		pdomain->coord_type != DOMAIN_COORD_TYPE_SW_ANY &&
		pdomain->coord_type != DOMAIN_COORD_TYPE_HW_ALL) {
		pthrottling->tsd_valid_flag = 0;
		pthrottling->shared_type = DOMAIN_COORD_TYPE_SW_ALL;
		}

		end:
		kfree(buffer.pointer);
		return result;
		@@ -589,6 +829,11 @@ static int acpi_processor_get_throttling(struct acpi_processor *pr)
		cpumask_t saved_mask;
		int ret;

		if (!pr)
		return -EINVAL;

		if (!pr->flags.throttling)
		return -ENODEV;
		/*
		* Migrate task to the cpu pointed by pr.
		*/
		@@ -742,13 +987,92 @@ static int acpi_processor_set_throttling_ptc(struct acpi_processor *pr,
		int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
		{
		cpumask_t saved_mask;
		int ret;
		int ret = 0;
		unsigned int i;
		struct acpi_processor *match_pr;
		struct acpi_processor_throttling *p_throttling;
		struct throttling_tstate t_state;
		cpumask_t online_throttling_cpus;

		if (!pr)
		return -EINVAL;

		if (!pr->flags.throttling)
		return -ENODEV;

		if ((state < 0) \|\| (state > (pr->throttling.state_count - 1)))
		return -EINVAL;

		saved_mask = current->cpus_allowed;
		t_state.target_state = state;
		p_throttling = &(pr->throttling);
		cpus_and(online_throttling_cpus, cpu_online_map,
		p_throttling->shared_cpu_map);
		/*
		* Migrate task to the cpu pointed by pr.
		* The throttling notifier will be called for every
		* affected cpu in order to get one proper T-state.
		* The notifier event is THROTTLING_PRECHANGE.
		*/
		saved_mask = current->cpus_allowed;
		for_each_cpu_mask(i, online_throttling_cpus) {
		t_state.cpu = i;
		acpi_processor_throttling_notifier(THROTTLING_PRECHANGE,
		&t_state);
		}
		/*
		* The function of acpi_processor_set_throttling will be called
		* to switch T-state. If the coordination type is SW_ALL or HW_ALL,
		* it is necessary to call it for every affected cpu. Otherwise
		* it can be called only for the cpu pointed by pr.
		*/
		if (p_throttling->shared_type == DOMAIN_COORD_TYPE_SW_ANY) {
		set_cpus_allowed(current, cpumask_of_cpu(pr->id));
		ret = pr->throttling.acpi_processor_set_throttling(pr, state);
		ret = p_throttling->acpi_processor_set_throttling(pr,
		t_state.target_state);
		} else {
		/*
		* When the T-state coordination is SW_ALL or HW_ALL,
		* it is necessary to set T-state for every affected
		* cpus.
		*/
		for_each_cpu_mask(i, online_throttling_cpus) {
		match_pr = processors[i];
		/*
		* If the pointer is invalid, we will report the
		* error message and continue.
		*/
		if (!match_pr) {
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
		"Invalid Pointer for CPU %d\n", i));
		continue;
		}
		/*
		* If the throttling control is unsupported on CPU i,
		* we will report the error message and continue.
		*/
		if (!match_pr->flags.throttling) {
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
		"Throttling Controll is unsupported "
		"on CPU %d\n", i));
		continue;
		}
		t_state.cpu = i;
		set_cpus_allowed(current, cpumask_of_cpu(i));
		ret = match_pr->throttling.
		acpi_processor_set_throttling(
		match_pr, t_state.target_state);
		}
		}
		/*
		* After the set_throttling is called, the
		* throttling notifier is called for every
		* affected cpu to update the T-states.
		* The notifier event is THROTTLING_POSTCHANGE
		*/
		for_each_cpu_mask(i, online_throttling_cpus) {
		t_state.cpu = i;
		acpi_processor_throttling_notifier(THROTTLING_POSTCHANGE,
		&t_state);
		}
		/* restore the previous state */
		set_cpus_allowed(current, saved_mask);
		return ret;
		@@ -757,6 +1081,7 @@ int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
		int acpi_processor_get_throttling_info(struct acpi_processor *pr)
		{
		int result = 0;
		struct acpi_processor_throttling *pthrottling;

		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
		"pblk_address[0x%08x] duty_offset[%d] duty_width[%d]\n",
		@@ -788,7 +1113,16 @@ int acpi_processor_get_throttling_info(struct acpi_processor *pr)
		&acpi_processor_set_throttling_ptc;
		}

		acpi_processor_get_tsd(pr);
		/*
		* If TSD package for one CPU can't be parsed successfully, it means
		* that this CPU will have no coordination with other CPUs.
		*/
		if (acpi_processor_get_tsd(pr)) {
		pthrottling = &pr->throttling;
		pthrottling->tsd_valid_flag = 0;
		cpu_set(pr->id, pthrottling->shared_cpu_map);
		pthrottling->shared_type = DOMAIN_COORD_TYPE_SW_ALL;
		}

		/*
		* PIIX4 Errata: We don't support throttling on the original PIIX4.

include/acpi/processor.h

+3 −1

Original line number	Diff line number	Diff line
		@@ -177,6 +177,8 @@ struct acpi_processor_throttling {
		u32 address;
		u8 duty_offset;
		u8 duty_width;
		u8 tsd_valid_flag;
		unsigned int shared_type;
		struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
		};

		@@ -317,7 +319,7 @@ static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
		int acpi_processor_get_throttling_info(struct acpi_processor *pr);
		extern int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
		extern struct file_operations acpi_processor_throttling_fops;

		extern void acpi_processor_throttling_init(void);
		/* in processor_idle.c */
		int acpi_processor_power_init(struct acpi_processor *pr,
		struct acpi_device *device);