ipmi_si_intf.c

来自「linux 内核源代码」· C语言 代码 · 共 2,489 行 · 第 1/5 页

{
	char *n;

	if (strcmp(curr, name) == 0) {
		if (!option) {
			printk(KERN_WARNING PFX
			       "No option given for '%s'\n",
			       curr);
			return -EINVAL;
		}
		*val = simple_strtoul(option, &n, 0);
		if ((*n != '\0') || (*option == '\0')) {
			printk(KERN_WARNING PFX
			       "Bad option given for '%s'\n",
			       curr);
			return -EINVAL;
		}
		return 1;
	}
	return 0;
}

static int hotmod_handler(const char *val, struct kernel_param *kp)
{
	char *str = kstrdup(val, GFP_KERNEL);
	int  rv;
	char *next, *curr, *s, *n, *o;
	enum hotmod_op op;
	enum si_type si_type;
	int  addr_space;
	unsigned long addr;
	int regspacing;
	int regsize;
	int regshift;
	int irq;
	int ipmb;
	int ival;
	int len;
	struct smi_info *info;

	if (!str)
		return -ENOMEM;

	/* Kill any trailing spaces, as we can get a "\n" from echo. */
	len = strlen(str);
	ival = len - 1;
	while ((ival >= 0) && isspace(str[ival])) {
		str[ival] = '\0';
		ival--;
	}

	for (curr = str; curr; curr = next) {
		regspacing = 1;
		regsize = 1;
		regshift = 0;
		irq = 0;
		ipmb = 0x20;

		next = strchr(curr, ':');
		if (next) {
			*next = '\0';
			next++;
		}

		rv = parse_str(hotmod_ops, &ival, "operation", &curr);
		if (rv)
			break;
		op = ival;

		rv = parse_str(hotmod_si, &ival, "interface type", &curr);
		if (rv)
			break;
		si_type = ival;

		rv = parse_str(hotmod_as, &addr_space, "address space", &curr);
		if (rv)
			break;

		s = strchr(curr, ',');
		if (s) {
			*s = '\0';
			s++;
		}
		addr = simple_strtoul(curr, &n, 0);
		if ((*n != '\0') || (*curr == '\0')) {
			printk(KERN_WARNING PFX "Invalid hotmod address"
			       " '%s'\n", curr);
			break;
		}

		while (s) {
			curr = s;
			s = strchr(curr, ',');
			if (s) {
				*s = '\0';
				s++;
			}
			o = strchr(curr, '=');
			if (o) {
				*o = '\0';
				o++;
			}
			rv = check_hotmod_int_op(curr, o, "rsp", &regspacing);
			if (rv < 0)
				goto out;
			else if (rv)
				continue;
			rv = check_hotmod_int_op(curr, o, "rsi", &regsize);
			if (rv < 0)
				goto out;
			else if (rv)
				continue;
			rv = check_hotmod_int_op(curr, o, "rsh", &regshift);
			if (rv < 0)
				goto out;
			else if (rv)
				continue;
			rv = check_hotmod_int_op(curr, o, "irq", &irq);
			if (rv < 0)
				goto out;
			else if (rv)
				continue;
			rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb);
			if (rv < 0)
				goto out;
			else if (rv)
				continue;

			rv = -EINVAL;
			printk(KERN_WARNING PFX
			       "Invalid hotmod option '%s'\n",
			       curr);
			goto out;
		}

		if (op == HM_ADD) {
			info = kzalloc(sizeof(*info), GFP_KERNEL);
			if (!info) {
				rv = -ENOMEM;
				goto out;
			}

			info->addr_source = "hotmod";
			info->si_type = si_type;
			info->io.addr_data = addr;
			info->io.addr_type = addr_space;
			if (addr_space == IPMI_MEM_ADDR_SPACE)
				info->io_setup = mem_setup;
			else
				info->io_setup = port_setup;

			info->io.addr = NULL;
			info->io.regspacing = regspacing;
			if (!info->io.regspacing)
				info->io.regspacing = DEFAULT_REGSPACING;
			info->io.regsize = regsize;
			if (!info->io.regsize)
				info->io.regsize = DEFAULT_REGSPACING;
			info->io.regshift = regshift;
			info->irq = irq;
			if (info->irq)
				info->irq_setup = std_irq_setup;
			info->slave_addr = ipmb;

			try_smi_init(info);
		} else {
			/* remove */
			struct smi_info *e, *tmp_e;

			mutex_lock(&smi_infos_lock);
			list_for_each_entry_safe(e, tmp_e, &smi_infos, link) {
				if (e->io.addr_type != addr_space)
					continue;
				if (e->si_type != si_type)
					continue;
				if (e->io.addr_data == addr)
					cleanup_one_si(e);
			}
			mutex_unlock(&smi_infos_lock);
		}
	}
	rv = len;
 out:
	kfree(str);
	return rv;
}

static __devinit void hardcode_find_bmc(void)
{
	int             i;
	struct smi_info *info;

	for (i = 0; i < SI_MAX_PARMS; i++) {
		if (!ports[i] && !addrs[i])
			continue;

		info = kzalloc(sizeof(*info), GFP_KERNEL);
		if (!info)
			return;

		info->addr_source = "hardcoded";

		if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) {
			info->si_type = SI_KCS;
		} else if (strcmp(si_type[i], "smic") == 0) {
			info->si_type = SI_SMIC;
		} else if (strcmp(si_type[i], "bt") == 0) {
			info->si_type = SI_BT;
		} else {
			printk(KERN_WARNING
			       "ipmi_si: Interface type specified "
			       "for interface %d, was invalid: %s\n",
			       i, si_type[i]);
			kfree(info);
			continue;
		}

		if (ports[i]) {
			/* An I/O port */
			info->io_setup = port_setup;
			info->io.addr_data = ports[i];
			info->io.addr_type = IPMI_IO_ADDR_SPACE;
		} else if (addrs[i]) {
			/* A memory port */
			info->io_setup = mem_setup;
			info->io.addr_data = addrs[i];
			info->io.addr_type = IPMI_MEM_ADDR_SPACE;
		} else {
			printk(KERN_WARNING
			       "ipmi_si: Interface type specified "
			       "for interface %d, "
			       "but port and address were not set or "
			       "set to zero.\n", i);
			kfree(info);
			continue;
		}

		info->io.addr = NULL;
		info->io.regspacing = regspacings[i];
		if (!info->io.regspacing)
			info->io.regspacing = DEFAULT_REGSPACING;
		info->io.regsize = regsizes[i];
		if (!info->io.regsize)
			info->io.regsize = DEFAULT_REGSPACING;
		info->io.regshift = regshifts[i];
		info->irq = irqs[i];
		if (info->irq)
			info->irq_setup = std_irq_setup;

		try_smi_init(info);
	}
}

#ifdef CONFIG_ACPI

#include <linux/acpi.h>

/* Once we get an ACPI failure, we don't try any more, because we go
   through the tables sequentially.  Once we don't find a table, there
   are no more. */
static int acpi_failure;

/* For GPE-type interrupts. */
static u32 ipmi_acpi_gpe(void *context)
{
	struct smi_info *smi_info = context;
	unsigned long   flags;
#ifdef DEBUG_TIMING
	struct timeval t;
#endif

	spin_lock_irqsave(&(smi_info->si_lock), flags);

	spin_lock(&smi_info->count_lock);
	smi_info->interrupts++;
	spin_unlock(&smi_info->count_lock);

#ifdef DEBUG_TIMING
	do_gettimeofday(&t);
	printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec);
#endif
	smi_event_handler(smi_info, 0);
	spin_unlock_irqrestore(&(smi_info->si_lock), flags);

	return ACPI_INTERRUPT_HANDLED;
}

static void acpi_gpe_irq_cleanup(struct smi_info *info)
{
	if (!info->irq)
		return;

	acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe);
}

static int acpi_gpe_irq_setup(struct smi_info *info)
{
	acpi_status status;

	if (!info->irq)
		return 0;

	/* FIXME - is level triggered right? */
	status = acpi_install_gpe_handler(NULL,
					  info->irq,
					  ACPI_GPE_LEVEL_TRIGGERED,
					  &ipmi_acpi_gpe,
					  info);
	if (status != AE_OK) {
		printk(KERN_WARNING
		       "ipmi_si: %s unable to claim ACPI GPE %d,"
		       " running polled\n",
		       DEVICE_NAME, info->irq);
		info->irq = 0;
		return -EINVAL;
	} else {
		info->irq_cleanup = acpi_gpe_irq_cleanup;
		printk("  Using ACPI GPE %d\n", info->irq);
		return 0;
	}
}

/*
 * Defined at
 * http://h21007.www2.hp.com/dspp/files/unprotected/devresource/Docs/TechPapers/IA64/hpspmi.pdf
 */
struct SPMITable {
	s8	Signature[4];
	u32	Length;
	u8	Revision;
	u8	Checksum;
	s8	OEMID[6];
	s8	OEMTableID[8];
	s8	OEMRevision[4];
	s8	CreatorID[4];
	s8	CreatorRevision[4];
	u8	InterfaceType;
	u8	IPMIlegacy;
	s16	SpecificationRevision;

	/*
	 * Bit 0 - SCI interrupt supported
	 * Bit 1 - I/O APIC/SAPIC
	 */
	u8	InterruptType;

	/* If bit 0 of InterruptType is set, then this is the SCI
           interrupt in the GPEx_STS register. */
	u8	GPE;

	s16	Reserved;

	/* If bit 1 of InterruptType is set, then this is the I/O
           APIC/SAPIC interrupt. */
	u32	GlobalSystemInterrupt;

	/* The actual register address. */
	struct acpi_generic_address addr;

	u8	UID[4];

	s8      spmi_id[1]; /* A '\0' terminated array starts here. */
};

static __devinit int try_init_acpi(struct SPMITable *spmi)
{
	struct smi_info  *info;
	u8 		 addr_space;

	if (spmi->IPMIlegacy != 1) {
	    printk(KERN_INFO "IPMI: Bad SPMI legacy %d\n", spmi->IPMIlegacy);
  	    return -ENODEV;
	}

	if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
		addr_space = IPMI_MEM_ADDR_SPACE;
	else
		addr_space = IPMI_IO_ADDR_SPACE;

	info = kzalloc(sizeof(*info), GFP_KERNEL);
	if (!info) {
		printk(KERN_ERR "ipmi_si: Could not allocate SI data (3)\n");
		return -ENOMEM;
	}

	info->addr_source = "ACPI";

	/* Figure out the interface type. */
	switch (spmi->InterfaceType)
	{
	case 1:	/* KCS */
		info->si_type = SI_KCS;
		break;
	case 2:	/* SMIC */
		info->si_type = SI_SMIC;
		break;
	case 3:	/* BT */
		info->si_type = SI_BT;
		break;
	default:
		printk(KERN_INFO "ipmi_si: Unknown ACPI/SPMI SI type %d\n",
			spmi->InterfaceType);
		kfree(info);
		return -EIO;
	}

	if (spmi->InterruptType & 1) {
		/* We've got a GPE interrupt. */
		info->irq = spmi->GPE;
		info->irq_setup = acpi_gpe_irq_setup;
	} else if (spmi->InterruptType & 2) {
		/* We've got an APIC/SAPIC interrupt. */
		info->irq = spmi->GlobalSystemInterrupt;
		info->irq_setup = std_irq_setup;
	} else {
		/* Use the default interrupt setting. */
		info->irq = 0;
		info->irq_setup = NULL;
	}

	if (spmi->addr.bit_width) {
		/* A (hopefully) properly formed register bit width. */
		info->io.regspacing = spmi->addr.bit_width / 8;
	} else {
		info->io.regspacing = DEFAULT_REGSPACING;
	}
	info->io.regsize = info->io.regspacing;
	info->io.regshift = spmi->addr.bit_offset;

	if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
		info->io_setup = mem_setup;
		info->io.addr_type = IPMI_MEM_ADDR_SPACE;
	} else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
		info->io_setup = port_setup;
		info->io.addr_type = IPMI_IO_ADDR_SPACE;
	} else {
		kfree(info);
		printk("ipmi_si: Unknown ACPI I/O Address type\n");
		return -EIO;
	}
	info->io.addr_data = spmi->addr.address;

	try_smi_init(info);

	return 0;
}

static __devinit void acpi_find_bmc(void)
{
	acpi_status      status;
	struct SPMITable *spmi;
	int              i;

	if (acpi_disabled)
		return;

	if (acpi_failure)
		return;

	for (i = 0; ; i++) {
		status = acpi_get_table(ACPI_SIG_SPMI, i+1,
					(struct acpi_table_header **)&spmi);
		if (status != AE_OK)
			return;

		try_init_acpi(spmi);
	}
}
#endif

#ifdef CONFIG_DMI
struct dmi_ipmi_data
{
	u8   		type;
	u8   		addr_space;
	unsigned long	base_addr;
	u8   		irq;
	u8              offset;
	u8              slave_addr;
};

static int __devinit decode_dmi(const struct dmi_header *dm,
				struct dmi_ipmi_data *dmi)
{
	const u8	*data = (const u8 *)dm;
	unsigned long  	base_addr;
	u8		reg_spacing;
	u8              len = dm->length;

	dmi->type = data[4];

	memcpy(&base_addr, data+8, sizeof(unsigned long));
	if (len >= 0x11) {
		if (base_addr & 1) {
			/* I/O */
			base_addr &= 0xFFFE;
			dmi->addr_space = IPMI_IO_ADDR_SPACE;
		}