Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6 (e0f88db3) · Commits · e / devices / android_kernel_oneplus_sm7250

arch/sparc64/kernel/Makefile

+1 −1

Original line number	Diff line number	Diff line
		@@ -12,7 +12,7 @@ obj-y := process.o setup.o cpu.o idprom.o \
		irq.o ptrace.o time.o sys_sparc.o signal.o \
		unaligned.o central.o pci.o starfire.o semaphore.o \
		power.o sbus.o iommu_common.o sparc64_ksyms.o chmc.o \
		visemul.o prom.o of_device.o
		visemul.o prom.o of_device.o hvapi.o

		obj-$(CONFIG_STACKTRACE) += stacktrace.o
		obj-$(CONFIG_PCI) += ebus.o isa.o pci_common.o pci_iommu.o \

arch/sparc64/kernel/entry.S

+94 −0

Original line number	Diff line number	Diff line
		@@ -1843,3 +1843,97 @@ sun4v_cpu_state:
		mov %o1, %o0
		1: retl
		nop

		/* %o0: API group number
		* %o1: pointer to unsigned long major number storage
		* %o2: pointer to unsigned long minor number storage
		*
		* returns %o0: status
		*/
		.globl sun4v_get_version
		sun4v_get_version:
		mov HV_CORE_GET_VER, %o5
		mov %o1, %o3
		mov %o2, %o4
		ta HV_CORE_TRAP
		stx %o1, [%o3]
		retl
		stx %o2, [%o4]

		/* %o0: API group number
		* %o1: desired major number
		* %o2: desired minor number
		* %o3: pointer to unsigned long actual minor number storage
		*
		* returns %o0: status
		*/
		.globl sun4v_set_version
		sun4v_set_version:
		mov HV_CORE_SET_VER, %o5
		mov %o3, %o4
		ta HV_CORE_TRAP
		retl
		stx %o1, [%o4]

		/* %o0: pointer to unsigned long status
		*
		* returns %o0: signed character
		*/
		.globl sun4v_con_getchar
		sun4v_con_getchar:
		mov %o0, %o4
		mov HV_FAST_CONS_GETCHAR, %o5
		clr %o0
		clr %o1
		ta HV_FAST_TRAP
		stx %o0, [%o4]
		retl
		sra %o1, 0, %o0

		/* %o0: signed long character
		*
		* returns %o0: status
		*/
		.globl sun4v_con_putchar
		sun4v_con_putchar:
		mov HV_FAST_CONS_PUTCHAR, %o5
		ta HV_FAST_TRAP
		retl
		sra %o0, 0, %o0

		/* %o0: buffer real address
		* %o1: buffer size
		* %o2: pointer to unsigned long bytes_read
		*
		* returns %o0: status
		*/
		.globl sun4v_con_read
		sun4v_con_read:
		mov %o2, %o4
		mov HV_FAST_CONS_READ, %o5
		ta HV_FAST_TRAP
		brnz %o0, 1f
		cmp %o1, -1 /* break */
		be,a,pn %icc, 1f
		mov %o1, %o0
		cmp %o1, -2 /* hup */
		be,a,pn %icc, 1f
		mov %o1, %o0
		stx %o1, [%o4]
		1: retl
		nop

		/* %o0: buffer real address
		* %o1: buffer size
		* %o2: pointer to unsigned long bytes_written
		*
		* returns %o0: status
		*/
		.globl sun4v_con_write
		sun4v_con_write:
		mov %o2, %o4
		mov HV_FAST_CONS_WRITE, %o5
		ta HV_FAST_TRAP
		stx %o1, [%o4]
		retl
		nop

arch/sparc64/kernel/hvapi.c

0 → 100644

+189 −0

Original line number	Diff line number	Diff line
		/* hvapi.c: Hypervisor API management.
		*
		* Copyright (C) 2007 David S. Miller <davem@davemloft.net>
		*/
		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/init.h>
		#include <linux/slab.h>

		#include <asm/hypervisor.h>
		#include <asm/oplib.h>

		/* If the hypervisor indicates that the API setting
		* calls are unsupported, by returning HV_EBADTRAP or
		* HV_ENOTSUPPORTED, we assume that API groups with the
		* PRE_API flag set are major 1 minor 0.
		*/
		struct api_info {
		unsigned long group;
		unsigned long major;
		unsigned long minor;
		unsigned int refcnt;
		unsigned int flags;
		#define FLAG_PRE_API 0x00000001
		};

		static struct api_info api_table[] = {
		{ .group = HV_GRP_SUN4V, .flags = FLAG_PRE_API },
		{ .group = HV_GRP_CORE, .flags = FLAG_PRE_API },
		{ .group = HV_GRP_INTR, },
		{ .group = HV_GRP_SOFT_STATE, },
		{ .group = HV_GRP_PCI, .flags = FLAG_PRE_API },
		{ .group = HV_GRP_LDOM, },
		{ .group = HV_GRP_SVC_CHAN, .flags = FLAG_PRE_API },
		{ .group = HV_GRP_NCS, .flags = FLAG_PRE_API },
		{ .group = HV_GRP_NIAG_PERF, .flags = FLAG_PRE_API },
		{ .group = HV_GRP_FIRE_PERF, },
		{ .group = HV_GRP_DIAG, .flags = FLAG_PRE_API },
		};

		static DEFINE_SPINLOCK(hvapi_lock);

		static struct api_info *__get_info(unsigned long group)
		{
		int i;

		for (i = 0; i < ARRAY_SIZE(api_table); i++) {
		if (api_table[i].group == group)
		return &api_table[i];
		}
		return NULL;
		}

		static void __get_ref(struct api_info *p)
		{
		p->refcnt++;
		}

		static void __put_ref(struct api_info *p)
		{
		if (--p->refcnt == 0) {
		unsigned long ignore;

		sun4v_set_version(p->group, 0, 0, &ignore);
		p->major = p->minor = 0;
		}
		}

		/* Register a hypervisor API specification. It indicates the
		* API group and desired major+minor.
		*
		* If an existing API registration exists '0' (success) will
		* be returned if it is compatible with the one being registered.
		* Otherwise a negative error code will be returned.
		*
		* Otherwise an attempt will be made to negotiate the requested
		* API group/major/minor with the hypervisor, and errors returned
		* if that does not succeed.
		*/
		int sun4v_hvapi_register(unsigned long group, unsigned long major,
		unsigned long *minor)
		{
		struct api_info *p;
		unsigned long flags;
		int ret;

		spin_lock_irqsave(&hvapi_lock, flags);
		p = __get_info(group);
		ret = -EINVAL;
		if (p) {
		if (p->refcnt) {
		ret = -EINVAL;
		if (p->major == major) {
		*minor = p->minor;
		ret = 0;
		}
		} else {
		unsigned long actual_minor;
		unsigned long hv_ret;

		hv_ret = sun4v_set_version(group, major, *minor,
		&actual_minor);
		ret = -EINVAL;
		if (hv_ret == HV_EOK) {
		*minor = actual_minor;
		p->major = major;
		p->minor = actual_minor;
		ret = 0;
		} else if (hv_ret == HV_EBADTRAP \|\|
		HV_ENOTSUPPORTED) {
		if (p->flags & FLAG_PRE_API) {
		if (major == 1) {
		p->major = 1;
		p->minor = 0;
		*minor = 0;
		ret = 0;
		}
		}
		}
		}

		if (ret == 0)
		__get_ref(p);
		}
		spin_unlock_irqrestore(&hvapi_lock, flags);

		return ret;
		}
		EXPORT_SYMBOL(sun4v_hvapi_register);

		void sun4v_hvapi_unregister(unsigned long group)
		{
		struct api_info *p;
		unsigned long flags;

		spin_lock_irqsave(&hvapi_lock, flags);
		p = __get_info(group);
		if (p)
		__put_ref(p);
		spin_unlock_irqrestore(&hvapi_lock, flags);
		}
		EXPORT_SYMBOL(sun4v_hvapi_unregister);

		int sun4v_hvapi_get(unsigned long group,
		unsigned long *major,
		unsigned long *minor)
		{
		struct api_info *p;
		unsigned long flags;
		int ret;

		spin_lock_irqsave(&hvapi_lock, flags);
		ret = -EINVAL;
		p = __get_info(group);
		if (p && p->refcnt) {
		*major = p->major;
		*minor = p->minor;
		ret = 0;
		}
		spin_unlock_irqrestore(&hvapi_lock, flags);

		return ret;
		}
		EXPORT_SYMBOL(sun4v_hvapi_get);

		void __init sun4v_hvapi_init(void)
		{
		unsigned long group, major, minor;

		group = HV_GRP_SUN4V;
		major = 1;
		minor = 0;
		if (sun4v_hvapi_register(group, major, &minor))
		goto bad;

		group = HV_GRP_CORE;
		major = 1;
		minor = 1;
		if (sun4v_hvapi_register(group, major, &minor))
		goto bad;

		return;

		bad:
		prom_printf("HVAPI: Cannot register API group "
		"%lx with major(%u) minor(%u)\n",
		group, major, minor);
		prom_halt();
		}

arch/sparc64/kernel/setup.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -269,6 +269,7 @@ void __init per_cpu_patch(void)

		void __init sun4v_patch(void)
		{
		extern void sun4v_hvapi_init(void);
		struct sun4v_1insn_patch_entry *p1;
		struct sun4v_2insn_patch_entry *p2;

		@@ -300,6 +301,8 @@ void __init sun4v_patch(void)

		p2++;
		}

		sun4v_hvapi_init();
		}

		#ifdef CONFIG_SMP

drivers/serial/sunhv.c

+205 −71

Original line number	Diff line number	Diff line
		/* sunhv.c: Serial driver for SUN4V hypervisor console.
		*
		* Copyright (C) 2006 David S. Miller (davem@davemloft.net)
		* Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net)
		*/

		#include <linux/module.h>
		@@ -35,57 +35,51 @@
		#define CON_BREAK ((long)-1)
		#define CON_HUP ((long)-2)

		static inline long hypervisor_con_getchar(long *status)
		{
		register unsigned long func asm("%o5");
		register unsigned long arg0 asm("%o0");
		register unsigned long arg1 asm("%o1");

		func = HV_FAST_CONS_GETCHAR;
		arg0 = 0;
		arg1 = 0;
		__asm__ __volatile__("ta %6"
		: "=&r" (func), "=&r" (arg0), "=&r" (arg1)
		: "0" (func), "1" (arg0), "2" (arg1),
		"i" (HV_FAST_TRAP));
		#define IGNORE_BREAK 0x1
		#define IGNORE_ALL 0x2

		*status = arg0;
		static char *con_write_page;
		static char *con_read_page;

		return (long) arg1;
		}
		static int hung_up = 0;

		static inline long hypervisor_con_putchar(long ch)
		static void transmit_chars_putchar(struct uart_port port, struct circ_buf xmit)
		{
		register unsigned long func asm("%o5");
		register unsigned long arg0 asm("%o0");
		while (!uart_circ_empty(xmit)) {
		long status = sun4v_con_putchar(xmit->buf[xmit->tail]);

		func = HV_FAST_CONS_PUTCHAR;
		arg0 = ch;
		__asm__ __volatile__("ta %4"
		: "=&r" (func), "=&r" (arg0)
		: "0" (func), "1" (arg0), "i" (HV_FAST_TRAP));
		if (status != HV_EOK)
		break;

		return (long) arg0;
		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
		port->icount.tx++;
		}
		}

		#define IGNORE_BREAK 0x1
		#define IGNORE_ALL 0x2
		static void transmit_chars_write(struct uart_port port, struct circ_buf xmit)
		{
		while (!uart_circ_empty(xmit)) {
		unsigned long ra = __pa(xmit->buf + xmit->tail);
		unsigned long len, status, sent;

		static int hung_up = 0;
		len = CIRC_CNT_TO_END(xmit->head, xmit->tail,
		UART_XMIT_SIZE);
		status = sun4v_con_write(ra, len, &sent);
		if (status != HV_EOK)
		break;
		xmit->tail = (xmit->tail + sent) & (UART_XMIT_SIZE - 1);
		port->icount.tx += sent;
		}
		}

		static struct tty_struct receive_chars(struct uart_port port)
		static int receive_chars_getchar(struct uart_port port, struct tty_struct tty)
		{
		struct tty_struct *tty = NULL;
		int saw_console_brk = 0;
		int limit = 10000;

		if (port->info != NULL) /* Unopened serial console */
		tty = port->info->tty;

		while (limit-- > 0) {
		long status;
		long c = hypervisor_con_getchar(&status);
		unsigned char flag;
		long c = sun4v_con_getchar(&status);

		if (status == HV_EWOULDBLOCK)
		break;
		@@ -110,27 +104,90 @@ static struct tty_struct receive_chars(struct uart_port port)
		continue;
		}

		flag = TTY_NORMAL;
		port->icount.rx++;
		if (c == CON_BREAK) {
		port->icount.brk++;
		if (uart_handle_break(port))

		if (uart_handle_sysrq_char(port, c))
		continue;
		flag = TTY_BREAK;

		tty_insert_flip_char(tty, c, TTY_NORMAL);
		}

		if (uart_handle_sysrq_char(port, c))
		return saw_console_brk;
		}

		static int receive_chars_read(struct uart_port port, struct tty_struct tty)
		{
		int saw_console_brk = 0;
		int limit = 10000;

		while (limit-- > 0) {
		unsigned long ra = __pa(con_read_page);
		unsigned long bytes_read, i;
		long stat = sun4v_con_read(ra, PAGE_SIZE, &bytes_read);

		if (stat != HV_EOK) {
		bytes_read = 0;

		if (stat == CON_BREAK) {
		if (uart_handle_break(port))
		continue;
		saw_console_brk = 1;
		*con_read_page = 0;
		bytes_read = 1;
		} else if (stat == CON_HUP) {
		hung_up = 1;
		uart_handle_dcd_change(port, 0);
		continue;
		} else {
		/* HV_EWOULDBLOCK, etc. */
		break;
		}
		}

		if (hung_up) {
		hung_up = 0;
		uart_handle_dcd_change(port, 1);
		}

		if ((port->ignore_status_mask & IGNORE_ALL) \|\|
		((port->ignore_status_mask & IGNORE_BREAK) &&
		(c == CON_BREAK)))
		for (i = 0; i < bytes_read; i++)
		uart_handle_sysrq_char(port, con_read_page[i]);

		if (tty == NULL)
		continue;

		tty_insert_flip_char(tty, c, flag);
		port->icount.rx += bytes_read;

		tty_insert_flip_string(tty, con_read_page, bytes_read);
		}

		return saw_console_brk;
		}

		if (saw_console_brk)
		struct sunhv_ops {
		void (transmit_chars)(struct uart_port port, struct circ_buf *xmit);
		int (receive_chars)(struct uart_port port, struct tty_struct *tty);
		};

		static struct sunhv_ops bychar_ops = {
		.transmit_chars = transmit_chars_putchar,
		.receive_chars = receive_chars_getchar,
		};

		static struct sunhv_ops bywrite_ops = {
		.transmit_chars = transmit_chars_write,
		.receive_chars = receive_chars_read,
		};

		static struct sunhv_ops *sunhv_ops = &bychar_ops;

		static struct tty_struct receive_chars(struct uart_port port)
		{
		struct tty_struct *tty = NULL;

		if (port->info != NULL) /* Unopened serial console */
		tty = port->info->tty;

		if (sunhv_ops->receive_chars(port, tty))
		sun_do_break();

		return tty;
		@@ -147,15 +204,7 @@ static void transmit_chars(struct uart_port *port)
		if (uart_circ_empty(xmit) \|\| uart_tx_stopped(port))
		return;

		while (!uart_circ_empty(xmit)) {
		long status = hypervisor_con_putchar(xmit->buf[xmit->tail]);

		if (status != HV_EOK)
		break;

		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
		port->icount.tx++;
		}
		sunhv_ops->transmit_chars(port, xmit);

		if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
		uart_write_wakeup(port);
		@@ -212,7 +261,7 @@ static void sunhv_start_tx(struct uart_port *port)
		struct circ_buf *xmit = &port->info->xmit;

		while (!uart_circ_empty(xmit)) {
		long status = hypervisor_con_putchar(xmit->buf[xmit->tail]);
		long status = sun4v_con_putchar(xmit->buf[xmit->tail]);

		if (status != HV_EOK)
		break;
		@@ -231,9 +280,10 @@ static void sunhv_send_xchar(struct uart_port *port, char ch)
		spin_lock_irqsave(&port->lock, flags);

		while (limit-- > 0) {
		long status = hypervisor_con_putchar(ch);
		long status = sun4v_con_putchar(ch);
		if (status == HV_EOK)
		break;
		udelay(1);
		}

		spin_unlock_irqrestore(&port->lock, flags);
		@@ -254,15 +304,15 @@ static void sunhv_break_ctl(struct uart_port *port, int break_state)
		{
		if (break_state) {
		unsigned long flags;
		int limit = 1000000;
		int limit = 10000;

		spin_lock_irqsave(&port->lock, flags);

		while (limit-- > 0) {
		long status = hypervisor_con_putchar(CON_BREAK);
		long status = sun4v_con_putchar(CON_BREAK);
		if (status == HV_EOK)
		break;
		udelay(2);
		udelay(1);
		}

		spin_unlock_irqrestore(&port->lock, flags);
		@@ -359,38 +409,99 @@ static struct uart_driver sunhv_reg = {

		static struct uart_port *sunhv_port;

		static inline void sunhv_console_putchar(struct uart_port *port, char c)
		/* Copy 's' into the con_write_page, decoding "\n" into
		* "\r\n" along the way. We have to return two lengths
		* because the caller needs to know how much to advance
		* 's' and also how many bytes to output via con_write_page.
		*/
		static int fill_con_write_page(const char *s, unsigned int n,
		unsigned long *page_bytes)
		{
		const char *orig_s = s;
		char *p = con_write_page;
		int left = PAGE_SIZE;

		while (n--) {
		if (*s == '\n') {
		if (left < 2)
		break;
		*p++ = '\r';
		left--;
		} else if (left < 1)
		break;
		p++ = s++;
		left--;
		}
		*page_bytes = p - con_write_page;
		return s - orig_s;
		}

		static void sunhv_console_write_paged(struct console con, const char s, unsigned n)
		{
		struct uart_port *port = sunhv_port;
		unsigned long flags;
		int limit = 1000000;

		spin_lock_irqsave(&port->lock, flags);
		while (n > 0) {
		unsigned long ra = __pa(con_write_page);
		unsigned long page_bytes;
		unsigned int cpy = fill_con_write_page(s, n,
		&page_bytes);

		n -= cpy;
		s += cpy;
		while (page_bytes > 0) {
		unsigned long written;
		int limit = 1000000;

		while (limit--) {
		unsigned long stat;

		stat = sun4v_con_write(ra, page_bytes,
		&written);
		if (stat == HV_EOK)
		break;
		udelay(1);
		}
		if (limit <= 0)
		break;
		page_bytes -= written;
		ra += written;
		}
		}
		spin_unlock_irqrestore(&port->lock, flags);
		}

		static inline void sunhv_console_putchar(struct uart_port *port, char c)
		{
		int limit = 1000000;

		while (limit-- > 0) {
		long status = hypervisor_con_putchar(c);
		long status = sun4v_con_putchar(c);
		if (status == HV_EOK)
		break;
		udelay(2);
		udelay(1);
		}

		spin_unlock_irqrestore(&port->lock, flags);
		}

		static void sunhv_console_write(struct console con, const char s, unsigned n)
		static void sunhv_console_write_bychar(struct console con, const char s, unsigned n)
		{
		struct uart_port *port = sunhv_port;
		unsigned long flags;
		int i;

		spin_lock_irqsave(&port->lock, flags);
		for (i = 0; i < n; i++) {
		if (*s == '\n')
		sunhv_console_putchar(port, '\r');
		sunhv_console_putchar(port, *s++);
		}
		spin_unlock_irqrestore(&port->lock, flags);
		}

		static struct console sunhv_console = {
		.name = "ttyHV",
		.write = sunhv_console_write,
		.write = sunhv_console_write_bychar,
		.device = uart_console_device,
		.flags = CON_PRINTBUFFER,
		.index = -1,
		@@ -410,6 +521,7 @@ static inline struct console *SUNHV_CONSOLE(void)
		static int __devinit hv_probe(struct of_device op, const struct of_device_id match)
		{
		struct uart_port *port;
		unsigned long minor;
		int err;

		if (op->irqs[0] == 0xffffffff)
		@@ -419,6 +531,22 @@ static int __devinit hv_probe(struct of_device op, const struct of_device_id m
		if (unlikely(!port))
		return -ENOMEM;

		minor = 1;
		if (sun4v_hvapi_register(HV_GRP_CORE, 1, &minor) == 0 &&
		minor >= 1) {
		err = -ENOMEM;
		con_write_page = kzalloc(PAGE_SIZE, GFP_KERNEL);
		if (!con_write_page)
		goto out_free_port;

		con_read_page = kzalloc(PAGE_SIZE, GFP_KERNEL);
		if (!con_read_page)
		goto out_free_con_write_page;

		sunhv_console.write = sunhv_console_write_paged;
		sunhv_ops = &bywrite_ops;
		}

		sunhv_port = port;

		port->line = 0;
		@@ -437,7 +565,7 @@ static int __devinit hv_probe(struct of_device op, const struct of_device_id m

		err = uart_register_driver(&sunhv_reg);
		if (err)
		goto out_free_port;
		goto out_free_con_read_page;

		sunhv_reg.tty_driver->name_base = sunhv_reg.minor - 64;
		sunserial_current_minor += 1;
		@@ -463,6 +591,12 @@ static int __devinit hv_probe(struct of_device op, const struct of_device_id m
		sunserial_current_minor -= 1;
		uart_unregister_driver(&sunhv_reg);

		out_free_con_read_page:
		kfree(con_read_page);

		out_free_con_write_page:
		kfree(con_write_page);

		out_free_port:
		kfree(port);
		sunhv_port = NULL;