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-rw-r--r--arch/mips/kernel/irixsig.c3
-rw-r--r--arch/mips/kernel/rtlx.c197
-rw-r--r--arch/mips/kernel/signal.c3
-rw-r--r--arch/mips/kernel/signal32.c13
-rw-r--r--arch/mips/kernel/vpe.c100
5 files changed, 146 insertions, 170 deletions
diff --git a/arch/mips/kernel/irixsig.c b/arch/mips/kernel/irixsig.c
index 908e6368420..dd118c60bcd 100644
--- a/arch/mips/kernel/irixsig.c
+++ b/arch/mips/kernel/irixsig.c
@@ -502,8 +502,7 @@ asmlinkage int irix_sigpoll_sys(unsigned long __user *set,
while(1) {
long tmp = 0;
- current->state = TASK_INTERRUPTIBLE;
- expire = schedule_timeout(expire);
+ expire = schedule_timeout_interruptible(expire);
for (i=0; i<=4; i++)
tmp |= (current->pending.signal.sig[i] & kset.sig[i]);
diff --git a/arch/mips/kernel/rtlx.c b/arch/mips/kernel/rtlx.c
index 8c81f3cb4e2..1d855112bac 100644
--- a/arch/mips/kernel/rtlx.c
+++ b/arch/mips/kernel/rtlx.c
@@ -20,42 +20,42 @@
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/init.h>
-#include <asm/uaccess.h>
-#include <linux/slab.h>
-#include <linux/list.h>
-#include <linux/vmalloc.h>
-#include <linux/elf.h>
-#include <linux/seq_file.h>
-#include <linux/syscalls.h>
-#include <linux/moduleloader.h>
-#include <linux/interrupt.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <asm/mipsmtregs.h>
-#include <asm/cacheflush.h>
-#include <asm/atomic.h>
+#include <asm/bitops.h>
#include <asm/cpu.h>
#include <asm/processor.h>
-#include <asm/system.h>
#include <asm/rtlx.h>
+#include <asm/uaccess.h>
-#define RTLX_MAJOR 64
#define RTLX_TARG_VPE 1
-struct rtlx_info *rtlx;
+static struct rtlx_info *rtlx;
static int major;
static char module_name[] = "rtlx";
-static inline int spacefree(int read, int write, int size);
+static struct irqaction irq;
+static int irq_num;
+
+static inline int spacefree(int read, int write, int size)
+{
+ if (read == write) {
+ /*
+ * never fill the buffer completely, so indexes are always
+ * equal if empty and only empty, or !equal if data available
+ */
+ return size - 1;
+ }
+
+ return ((read + size - write) % size) - 1;
+}
static struct chan_waitqueues {
wait_queue_head_t rt_queue;
wait_queue_head_t lx_queue;
} channel_wqs[RTLX_CHANNELS];
-static struct irqaction irq;
-static int irq_num;
-
extern void *vpe_get_shared(int index);
static void rtlx_dispatch(struct pt_regs *regs)
@@ -63,9 +63,8 @@ static void rtlx_dispatch(struct pt_regs *regs)
do_IRQ(MIPSCPU_INT_BASE + MIPS_CPU_RTLX_IRQ, regs);
}
-irqreturn_t rtlx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t rtlx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
- irqreturn_t r = IRQ_HANDLED;
int i;
for (i = 0; i < RTLX_CHANNELS; i++) {
@@ -75,30 +74,7 @@ irqreturn_t rtlx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
wake_up_interruptible(&channel_wqs[i].lx_queue);
}
- return r;
-}
-
-void dump_rtlx(void)
-{
- int i;
-
- printk("id 0x%lx state %d\n", rtlx->id, rtlx->state);
-
- for (i = 0; i < RTLX_CHANNELS; i++) {
- struct rtlx_channel *chan = &rtlx->channel[i];
-
- printk(" rt_state %d lx_state %d buffer_size %d\n",
- chan->rt_state, chan->lx_state, chan->buffer_size);
-
- printk(" rt_read %d rt_write %d\n",
- chan->rt_read, chan->rt_write);
-
- printk(" lx_read %d lx_write %d\n",
- chan->lx_read, chan->lx_write);
-
- printk(" rt_buffer <%s>\n", chan->rt_buffer);
- printk(" lx_buffer <%s>\n", chan->lx_buffer);
- }
+ return IRQ_HANDLED;
}
/* call when we have the address of the shared structure from the SP side. */
@@ -108,7 +84,7 @@ static int rtlx_init(struct rtlx_info *rtlxi)
if (rtlxi->id != RTLX_ID) {
printk(KERN_WARNING "no valid RTLX id at 0x%p\n", rtlxi);
- return (-ENOEXEC);
+ return -ENOEXEC;
}
/* initialise the wait queues */
@@ -120,9 +96,8 @@ static int rtlx_init(struct rtlx_info *rtlxi)
/* set up for interrupt handling */
memset(&irq, 0, sizeof(struct irqaction));
- if (cpu_has_vint) {
+ if (cpu_has_vint)
set_vi_handler(MIPS_CPU_RTLX_IRQ, rtlx_dispatch);
- }
irq_num = MIPSCPU_INT_BASE + MIPS_CPU_RTLX_IRQ;
irq.handler = rtlx_interrupt;
@@ -132,7 +107,8 @@ static int rtlx_init(struct rtlx_info *rtlxi)
setup_irq(irq_num, &irq);
rtlx = rtlxi;
- return (0);
+
+ return 0;
}
/* only allow one open process at a time to open each channel */
@@ -147,36 +123,36 @@ static int rtlx_open(struct inode *inode, struct file *filp)
if (rtlx == NULL) {
struct rtlx_info **p;
if( (p = vpe_get_shared(RTLX_TARG_VPE)) == NULL) {
- printk(" vpe_get_shared is NULL. Has an SP program been loaded?\n");
- return (-EFAULT);
+ printk(KERN_ERR "vpe_get_shared is NULL. "
+ "Has an SP program been loaded?\n");
+ return -EFAULT;
}
if (*p == NULL) {
- printk(" vpe_shared %p %p\n", p, *p);
- return (-EFAULT);
+ printk(KERN_ERR "vpe_shared %p %p\n", p, *p);
+ return -EFAULT;
}
if ((ret = rtlx_init(*p)) < 0)
- return (ret);
+ return ret;
}
chan = &rtlx->channel[minor];
- /* already open? */
- if (chan->lx_state == RTLX_STATE_OPENED)
- return (-EBUSY);
+ if (test_and_set_bit(RTLX_STATE_OPENED, &chan->lx_state))
+ return -EBUSY;
- chan->lx_state = RTLX_STATE_OPENED;
- return (0);
+ return 0;
}
static int rtlx_release(struct inode *inode, struct file *filp)
{
- int minor;
+ int minor = MINOR(inode->i_rdev);
- minor = MINOR(inode->i_rdev);
- rtlx->channel[minor].lx_state = RTLX_STATE_UNUSED;
- return (0);
+ clear_bit(RTLX_STATE_OPENED, &rtlx->channel[minor].lx_state);
+ smp_mb__after_clear_bit();
+
+ return 0;
}
static unsigned int rtlx_poll(struct file *file, poll_table * wait)
@@ -199,12 +175,13 @@ static unsigned int rtlx_poll(struct file *file, poll_table * wait)
if (spacefree(chan->rt_read, chan->rt_write, chan->buffer_size))
mask |= POLLOUT | POLLWRNORM;
- return (mask);
+ return mask;
}
static ssize_t rtlx_read(struct file *file, char __user * buffer, size_t count,
loff_t * ppos)
{
+ unsigned long failed;
size_t fl = 0L;
int minor;
struct rtlx_channel *lx;
@@ -216,7 +193,7 @@ static ssize_t rtlx_read(struct file *file, char __user * buffer, size_t count,
/* data available? */
if (lx->lx_write == lx->lx_read) {
if (file->f_flags & O_NONBLOCK)
- return (0); // -EAGAIN makes cat whinge
+ return 0; /* -EAGAIN makes cat whinge */
/* go to sleep */
add_wait_queue(&channel_wqs[minor].lx_queue, &wait);
@@ -232,39 +209,39 @@ static ssize_t rtlx_read(struct file *file, char __user * buffer, size_t count,
}
/* find out how much in total */
- count = min( count,
- (size_t)(lx->lx_write + lx->buffer_size - lx->lx_read) % lx->buffer_size);
+ count = min(count,
+ (size_t)(lx->lx_write + lx->buffer_size - lx->lx_read) % lx->buffer_size);
/* then how much from the read pointer onwards */
- fl = min( count, (size_t)lx->buffer_size - lx->lx_read);
+ fl = min(count, (size_t)lx->buffer_size - lx->lx_read);
- copy_to_user (buffer, &lx->lx_buffer[lx->lx_read], fl);
+ failed = copy_to_user (buffer, &lx->lx_buffer[lx->lx_read], fl);
+ if (failed) {
+ count = fl - failed;
+ goto out;
+ }
/* and if there is anything left at the beginning of the buffer */
- if ( count - fl )
- copy_to_user (buffer + fl, lx->lx_buffer, count - fl);
+ if (count - fl) {
+ failed = copy_to_user (buffer + fl, lx->lx_buffer, count - fl);
+ if (failed) {
+ count -= failed;
+ goto out;
+ }
+ }
+out:
/* update the index */
lx->lx_read += count;
lx->lx_read %= lx->buffer_size;
- return (count);
-}
-
-static inline int spacefree(int read, int write, int size)
-{
- if (read == write) {
- /* never fill the buffer completely, so indexes are always equal if empty
- and only empty, or !equal if data available */
- return (size - 1);
- }
-
- return ((read + size - write) % size) - 1;
+ return count;
}
static ssize_t rtlx_write(struct file *file, const char __user * buffer,
size_t count, loff_t * ppos)
{
+ unsigned long failed;
int minor;
struct rtlx_channel *rt;
size_t fl;
@@ -277,7 +254,7 @@ static ssize_t rtlx_write(struct file *file, const char __user * buffer,
if (!spacefree(rt->rt_read, rt->rt_write, rt->buffer_size)) {
if (file->f_flags & O_NONBLOCK)
- return (-EAGAIN);
+ return -EAGAIN;
add_wait_queue(&channel_wqs[minor].rt_queue, &wait);
set_current_state(TASK_INTERRUPTIBLE);
@@ -290,52 +267,64 @@ static ssize_t rtlx_write(struct file *file, const char __user * buffer,
}
/* total number of bytes to copy */
- count = min( count, (size_t)spacefree(rt->rt_read, rt->rt_write, rt->buffer_size) );
+ count = min(count, (size_t)spacefree(rt->rt_read, rt->rt_write, rt->buffer_size) );
/* first bit from write pointer to the end of the buffer, or count */
fl = min(count, (size_t) rt->buffer_size - rt->rt_write);
- copy_from_user(&rt->rt_buffer[rt->rt_write], buffer, fl);
+ failed = copy_from_user(&rt->rt_buffer[rt->rt_write], buffer, fl);
+ if (failed) {
+ count = fl - failed;
+ goto out;
+ }
/* if there's any left copy to the beginning of the buffer */
- if( count - fl )
- copy_from_user(rt->rt_buffer, buffer + fl, count - fl);
+ if (count - fl) {
+ failed = copy_from_user(rt->rt_buffer, buffer + fl, count - fl);
+ if (failed) {
+ count -= failed;
+ goto out;
+ }
+ }
+out:
rt->rt_write += count;
rt->rt_write %= rt->buffer_size;
- return(count);
+ return count;
}
static struct file_operations rtlx_fops = {
- .owner = THIS_MODULE,
- .open = rtlx_open,
- .release = rtlx_release,
- .write = rtlx_write,
- .read = rtlx_read,
- .poll = rtlx_poll
+ .owner = THIS_MODULE,
+ .open = rtlx_open,
+ .release = rtlx_release,
+ .write = rtlx_write,
+ .read = rtlx_read,
+ .poll = rtlx_poll
};
-static int rtlx_module_init(void)
+static char register_chrdev_failed[] __initdata =
+ KERN_ERR "rtlx_module_init: unable to register device\n";
+
+static int __init rtlx_module_init(void)
{
- if ((major = register_chrdev(RTLX_MAJOR, module_name, &rtlx_fops)) < 0) {
- printk("rtlx_module_init: unable to register device\n");
- return (-EBUSY);
+ major = register_chrdev(0, module_name, &rtlx_fops);
+ if (major < 0) {
+ printk(register_chrdev_failed);
+ return major;
}
- if (major == 0)
- major = RTLX_MAJOR;
-
- return (0);
+ return 0;
}
-static void rtlx_module_exit(void)
+static void __exit rtlx_module_exit(void)
{
unregister_chrdev(major, module_name);
}
module_init(rtlx_module_init);
module_exit(rtlx_module_exit);
+
MODULE_DESCRIPTION("MIPS RTLX");
-MODULE_AUTHOR("Elizabeth Clarke, MIPS Technologies, Inc");
+MODULE_AUTHOR("Elizabeth Clarke, MIPS Technologies, Inc.");
MODULE_LICENSE("GPL");
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index 9202a17db8f..05e09eedabf 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -384,9 +384,6 @@ give_sigsegv:
return 0;
}
-extern void setup_rt_frame_n32(struct k_sigaction * ka,
- struct pt_regs *regs, int signr, sigset_t *set, siginfo_t *info);
-
static inline int handle_signal(unsigned long sig, siginfo_t *info,
struct k_sigaction *ka, sigset_t *oldset, struct pt_regs *regs)
{
diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index dbe82130312..e315d3f6aa6 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -647,8 +647,8 @@ static inline void *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
return (void *)((sp - frame_size) & ALMASK);
}
-void setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
- int signr, sigset_t *set)
+int setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
+ int signr, sigset_t *set)
{
struct sigframe *frame;
int err = 0;
@@ -694,13 +694,15 @@ void setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
current->comm, current->pid,
frame, regs->cp0_epc, frame->sf_code);
#endif
- return;
+ return 1;
give_sigsegv:
force_sigsegv(signr, current);
+ return 0;
}
-void setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs, int signr, sigset_t *set, siginfo_t *info)
+int setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
+ int signr, sigset_t *set, siginfo_t *info)
{
struct rt_sigframe32 *frame;
int err = 0;
@@ -763,10 +765,11 @@ void setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs, int signr,
current->comm, current->pid,
frame, regs->cp0_epc, frame->rs_code);
#endif
- return;
+ return 1;
give_sigsegv:
force_sigsegv(signr, current);
+ return 0;
}
static inline int handle_signal(unsigned long sig, siginfo_t *info,
diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
index 97fefcc9dbe..06be405be39 100644
--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -58,10 +58,6 @@
typedef void *vpe_handle;
-// defined here because the kernel module loader doesn't have
-// anything to do with it.
-#define SHN_MIPS_SCOMMON 0xff03
-
#ifndef ARCH_SHF_SMALL
#define ARCH_SHF_SMALL 0
#endif
@@ -69,11 +65,8 @@ typedef void *vpe_handle;
/* If this is set, the section belongs in the init part of the module */
#define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1))
-// temp number,
-#define VPE_MAJOR 63
-
static char module_name[] = "vpe";
-static int major = 0;
+static int major;
/* grab the likely amount of memory we will need. */
#ifdef CONFIG_MIPS_VPE_LOADER_TOM
@@ -98,22 +91,7 @@ enum tc_state {
TC_STATE_DYNAMIC
};
-struct vpe;
-typedef struct tc {
- enum tc_state state;
- int index;
-
- /* parent VPE */
- struct vpe *pvpe;
-
- /* The list of TC's with this VPE */
- struct list_head tc;
-
- /* The global list of tc's */
- struct list_head list;
-} tc_t;
-
-typedef struct vpe {
+struct vpe {
enum vpe_state state;
/* (device) minor associated with this vpe */
@@ -135,7 +113,21 @@ typedef struct vpe {
/* shared symbol address */
void *shared_ptr;
-} vpe_t;
+};
+
+struct tc {
+ enum tc_state state;
+ int index;
+
+ /* parent VPE */
+ struct vpe *pvpe;
+
+ /* The list of TC's with this VPE */
+ struct list_head tc;
+
+ /* The global list of tc's */
+ struct list_head list;
+};
struct vpecontrol_ {
/* Virtual processing elements */
@@ -146,7 +138,7 @@ struct vpecontrol_ {
} vpecontrol;
static void release_progmem(void *ptr);
-static void dump_vpe(vpe_t * v);
+static void dump_vpe(struct vpe * v);
extern void save_gp_address(unsigned int secbase, unsigned int rel);
/* get the vpe associated with this minor */
@@ -197,13 +189,11 @@ struct vpe *alloc_vpe(int minor)
{
struct vpe *v;
- if ((v = kmalloc(sizeof(struct vpe), GFP_KERNEL)) == NULL) {
+ if ((v = kzalloc(sizeof(struct vpe), GFP_KERNEL)) == NULL) {
printk(KERN_WARNING "VPE: alloc_vpe no mem\n");
return NULL;
}
- memset(v, 0, sizeof(struct vpe));
-
INIT_LIST_HEAD(&v->tc);
list_add_tail(&v->list, &vpecontrol.vpe_list);
@@ -216,13 +206,11 @@ struct tc *alloc_tc(int index)
{
struct tc *t;
- if ((t = kmalloc(sizeof(struct tc), GFP_KERNEL)) == NULL) {
+ if ((t = kzalloc(sizeof(struct tc), GFP_KERNEL)) == NULL) {
printk(KERN_WARNING "VPE: alloc_tc no mem\n");
return NULL;
}
- memset(t, 0, sizeof(struct tc));
-
INIT_LIST_HEAD(&t->tc);
list_add_tail(&t->list, &vpecontrol.tc_list);
@@ -412,16 +400,17 @@ static int apply_r_mips_26(struct module *me, uint32_t *location,
return -ENOEXEC;
}
-/* Not desperately convinced this is a good check of an overflow condition
- anyway. But it gets in the way of handling undefined weak symbols which
- we want to set to zero.
- if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) {
- printk(KERN_ERR
- "module %s: relocation overflow\n",
- me->name);
- return -ENOEXEC;
- }
-*/
+/*
+ * Not desperately convinced this is a good check of an overflow condition
+ * anyway. But it gets in the way of handling undefined weak symbols which
+ * we want to set to zero.
+ * if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) {
+ * printk(KERN_ERR
+ * "module %s: relocation overflow\n",
+ * me->name);
+ * return -ENOEXEC;
+ * }
+ */
*location = (*location & ~0x03ffffff) |
((*location + (v >> 2)) & 0x03ffffff);
@@ -681,7 +670,7 @@ static void dump_tclist(void)
}
/* We are prepared so configure and start the VPE... */
-int vpe_run(vpe_t * v)
+int vpe_run(struct vpe * v)
{
unsigned long val;
struct tc *t;
@@ -772,7 +761,7 @@ int vpe_run(vpe_t * v)
return 0;
}
-static unsigned long find_vpe_symbols(vpe_t * v, Elf_Shdr * sechdrs,
+static unsigned long find_vpe_symbols(struct vpe * v, Elf_Shdr * sechdrs,
unsigned int symindex, const char *strtab,
struct module *mod)
{
@@ -792,10 +781,12 @@ static unsigned long find_vpe_symbols(vpe_t * v, Elf_Shdr * sechdrs,
return 0;
}
-/* Allocates a VPE with some program code space(the load address), copies the contents
- of the program (p)buffer performing relocatations/etc, free's it when finished.
+/*
+ * Allocates a VPE with some program code space(the load address), copies
+ * the contents of the program (p)buffer performing relocatations/etc,
+ * free's it when finished.
*/
-int vpe_elfload(vpe_t * v)
+int vpe_elfload(struct vpe * v)
{
Elf_Ehdr *hdr;
Elf_Shdr *sechdrs;
@@ -931,7 +922,7 @@ cleanup:
return err;
}
-static void dump_vpe(vpe_t * v)
+static void dump_vpe(struct vpe * v)
{
struct tc *t;
@@ -947,7 +938,7 @@ static void dump_vpe(vpe_t * v)
static int vpe_open(struct inode *inode, struct file *filp)
{
int minor;
- vpe_t *v;
+ struct vpe *v;
/* assume only 1 device at the mo. */
if ((minor = MINOR(inode->i_rdev)) != 1) {
@@ -1001,7 +992,7 @@ static int vpe_open(struct inode *inode, struct file *filp)
static int vpe_release(struct inode *inode, struct file *filp)
{
int minor, ret = 0;
- vpe_t *v;
+ struct vpe *v;
Elf_Ehdr *hdr;
minor = MINOR(inode->i_rdev);
@@ -1035,7 +1026,7 @@ static ssize_t vpe_write(struct file *file, const char __user * buffer,
{
int minor;
size_t ret = count;
- vpe_t *v;
+ struct vpe *v;
minor = MINOR(file->f_dentry->d_inode->i_rdev);
if ((v = get_vpe(minor)) == NULL)
@@ -1180,14 +1171,11 @@ static int __init vpe_module_init(void)
return -ENODEV;
}
- if ((major = register_chrdev(VPE_MAJOR, module_name, &vpe_fops) < 0)) {
+ if ((major = register_chrdev(0, module_name, &vpe_fops) < 0)) {
printk("VPE loader: unable to register character device\n");
- return -EBUSY;
+ return major;
}
- if (major == 0)
- major = VPE_MAJOR;
-
dmt();
dvpe();
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 05:35:09 +0000