* Copyright (C) 1996-2001 Cort Dougan
* Adapted for Power Macintosh by Paul Mackerras
* Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au)
- * Amiga/APUS changes by Jesper Skov (jskov@cygnus.co.uk).
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
#include <linux/mutex.h>
#include <linux/bootmem.h>
#include <linux/pci.h>
+#include <linux/debugfs.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/ptrace.h>
#include <asm/machdep.h>
#include <asm/udbg.h>
-#ifdef CONFIG_PPC_ISERIES
+#ifdef CONFIG_PPC64
#include <asm/paca.h>
+#include <asm/firmware.h>
+#include <asm/lv1call.h>
#endif
int __irq_offset_value;
EXPORT_SYMBOL(__irq_offset_value);
atomic_t ppc_n_lost_interrupts;
-#ifndef CONFIG_PPC_MERGE
-#define NR_MASK_WORDS ((NR_IRQS + 31) / 32)
-unsigned long ppc_cached_irq_mask[NR_MASK_WORDS];
-#endif
-
#ifdef CONFIG_TAU_INT
extern int tau_initialized;
extern int tau_interrupts(int);
#endif
#endif /* CONFIG_PPC32 */
-#if defined(CONFIG_SMP) && !defined(CONFIG_PPC_MERGE)
-extern atomic_t ipi_recv;
-extern atomic_t ipi_sent;
-#endif
-
#ifdef CONFIG_PPC64
EXPORT_SYMBOL(irq_desc);
int distribute_irqs = 1;
+
+static inline notrace unsigned long get_hard_enabled(void)
+{
+ unsigned long enabled;
+
+ __asm__ __volatile__("lbz %0,%1(13)"
+ : "=r" (enabled) : "i" (offsetof(struct paca_struct, hard_enabled)));
+
+ return enabled;
+}
+
+static inline notrace void set_soft_enabled(unsigned long enable)
+{
+ __asm__ __volatile__("stb %0,%1(13)"
+ : : "r" (enable), "i" (offsetof(struct paca_struct, soft_enabled)));
+}
+
+notrace void raw_local_irq_restore(unsigned long en)
+{
+ /*
+ * get_paca()->soft_enabled = en;
+ * Is it ever valid to use local_irq_restore(0) when soft_enabled is 1?
+ * That was allowed before, and in such a case we do need to take care
+ * that gcc will set soft_enabled directly via r13, not choose to use
+ * an intermediate register, lest we're preempted to a different cpu.
+ */
+ set_soft_enabled(en);
+ if (!en)
+ return;
+
+ if (firmware_has_feature(FW_FEATURE_ISERIES)) {
+ /*
+ * Do we need to disable preemption here? Not really: in the
+ * unlikely event that we're preempted to a different cpu in
+ * between getting r13, loading its lppaca_ptr, and loading
+ * its any_int, we might call iseries_handle_interrupts without
+ * an interrupt pending on the new cpu, but that's no disaster,
+ * is it? And the business of preempting us off the old cpu
+ * would itself involve a local_irq_restore which handles the
+ * interrupt to that cpu.
+ *
+ * But use "local_paca->lppaca_ptr" instead of "get_lppaca()"
+ * to avoid any preemption checking added into get_paca().
+ */
+ if (local_paca->lppaca_ptr->int_dword.any_int)
+ iseries_handle_interrupts();
+ }
+
+ /*
+ * if (get_paca()->hard_enabled) return;
+ * But again we need to take care that gcc gets hard_enabled directly
+ * via r13, not choose to use an intermediate register, lest we're
+ * preempted to a different cpu in between the two instructions.
+ */
+ if (get_hard_enabled())
+ return;
+
+ /*
+ * Need to hard-enable interrupts here. Since currently disabled,
+ * no need to take further asm precautions against preemption; but
+ * use local_paca instead of get_paca() to avoid preemption checking.
+ */
+ local_paca->hard_enabled = en;
+ if ((int)mfspr(SPRN_DEC) < 0)
+ mtspr(SPRN_DEC, 1);
+
+ /*
+ * Force the delivery of pending soft-disabled interrupts on PS3.
+ * Any HV call will have this side effect.
+ */
+ if (firmware_has_feature(FW_FEATURE_PS3_LV1)) {
+ u64 tmp;
+ lv1_get_version_info(&tmp);
+ }
+
+ __hard_irq_enable();
+}
+EXPORT_SYMBOL(raw_local_irq_restore);
#endif /* CONFIG_PPC64 */
int show_interrupts(struct seq_file *p, void *v)
seq_printf(p, "%3d: ", i);
#ifdef CONFIG_SMP
for_each_online_cpu(j)
- seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
+ seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
#else
seq_printf(p, "%10u ", kstat_irqs(i));
#endif /* CONFIG_SMP */
skip:
spin_unlock_irqrestore(&desc->lock, flags);
} else if (i == NR_IRQS) {
-#ifdef CONFIG_PPC32
-#ifdef CONFIG_TAU_INT
+#if defined(CONFIG_PPC32) && defined(CONFIG_TAU_INT)
if (tau_initialized){
seq_puts(p, "TAU: ");
for_each_online_cpu(j)
seq_printf(p, "%10u ", tau_interrupts(j));
seq_puts(p, " PowerPC Thermal Assist (cpu temp)\n");
}
-#endif
-#if defined(CONFIG_SMP) && !defined(CONFIG_PPC_MERGE)
- /* should this be per processor send/receive? */
- seq_printf(p, "IPI (recv/sent): %10u/%u\n",
- atomic_read(&ipi_recv), atomic_read(&ipi_sent));
-#endif
-#endif /* CONFIG_PPC32 */
+#endif /* CONFIG_PPC32 && CONFIG_TAU_INT*/
seq_printf(p, "BAD: %10u\n", ppc_spurious_interrupts);
}
return 0;
if (irq_desc[irq].status & IRQ_PER_CPU)
continue;
- cpus_and(mask, irq_desc[irq].affinity, map);
+ cpumask_and(&mask, irq_desc[irq].affinity, &map);
if (any_online_cpu(mask) == NR_CPUS) {
printk("Breaking affinity for irq %i\n", irq);
mask = map;
}
if (irq_desc[irq].chip->set_affinity)
- irq_desc[irq].chip->set_affinity(irq, mask);
+ irq_desc[irq].chip->set_affinity(irq, &mask);
else if (irq_desc[irq].action && !(warned++))
printk("Cannot set affinity for irq %i\n", irq);
}
void do_IRQ(struct pt_regs *regs)
{
+ struct pt_regs *old_regs = set_irq_regs(regs);
unsigned int irq;
#ifdef CONFIG_IRQSTACKS
struct thread_info *curtp, *irqtp;
#endif
- irq_enter();
+ irq_enter();
#ifdef CONFIG_DEBUG_STACKOVERFLOW
/* Debugging check for stack overflow: is there less than 2KB free? */
/*
* Every platform is required to implement ppc_md.get_irq.
- * This function will either return an irq number or -1 to
+ * This function will either return an irq number or NO_IRQ to
* indicate there are no more pending.
- * The value -2 is for buggy hardware and means that this IRQ
- * has already been handled. -- Tom
+ * The value NO_IRQ_IGNORE is for buggy hardware and means that this
+ * IRQ has already been handled. -- Tom
*/
- irq = ppc_md.get_irq(regs);
+ irq = ppc_md.get_irq();
if (irq != NO_IRQ && irq != NO_IRQ_IGNORE) {
#ifdef CONFIG_IRQSTACKS
if (curtp != irqtp) {
struct irq_desc *desc = irq_desc + irq;
void *handler = desc->handle_irq;
+ unsigned long saved_sp_limit = current->thread.ksp_limit;
if (handler == NULL)
handler = &__do_IRQ;
irqtp->task = curtp->task;
irqtp->flags = 0;
- call_handle_irq(irq, desc, regs, irqtp, handler);
+
+ /* Copy the softirq bits in preempt_count so that the
+ * softirq checks work in the hardirq context.
+ */
+ irqtp->preempt_count =
+ (irqtp->preempt_count & ~SOFTIRQ_MASK) |
+ (curtp->preempt_count & SOFTIRQ_MASK);
+
+ current->thread.ksp_limit = (unsigned long)irqtp +
+ _ALIGN_UP(sizeof(struct thread_info), 16);
+ call_handle_irq(irq, desc, irqtp, handler);
+ current->thread.ksp_limit = saved_sp_limit;
irqtp->task = NULL;
+
+
+ /* Set any flag that may have been set on the
+ * alternate stack
+ */
if (irqtp->flags)
set_bits(irqtp->flags, &curtp->flags);
} else
#endif
- generic_handle_irq(irq, regs);
+ generic_handle_irq(irq);
} else if (irq != NO_IRQ_IGNORE)
/* That's not SMP safe ... but who cares ? */
ppc_spurious_interrupts++;
- irq_exit();
+ irq_exit();
+ set_irq_regs(old_regs);
#ifdef CONFIG_PPC_ISERIES
- if (get_lppaca()->int_dword.fields.decr_int) {
+ if (firmware_has_feature(FW_FEATURE_ISERIES) &&
+ get_lppaca()->int_dword.fields.decr_int) {
get_lppaca()->int_dword.fields.decr_int = 0;
/* Signal a fake decrementer interrupt */
timer_interrupt(regs);
void __init init_IRQ(void)
{
- ppc_md.init_IRQ();
-#ifdef CONFIG_PPC64
+ if (ppc_md.init_IRQ)
+ ppc_md.init_IRQ();
+
+ exc_lvl_ctx_init();
+
irq_ctx_init();
-#endif
}
+#if defined(CONFIG_BOOKE) || defined(CONFIG_40x)
+struct thread_info *critirq_ctx[NR_CPUS] __read_mostly;
+struct thread_info *dbgirq_ctx[NR_CPUS] __read_mostly;
+struct thread_info *mcheckirq_ctx[NR_CPUS] __read_mostly;
+
+void exc_lvl_ctx_init(void)
+{
+ struct thread_info *tp;
+ int i;
+
+ for_each_possible_cpu(i) {
+ memset((void *)critirq_ctx[i], 0, THREAD_SIZE);
+ tp = critirq_ctx[i];
+ tp->cpu = i;
+ tp->preempt_count = 0;
+
+#ifdef CONFIG_BOOKE
+ memset((void *)dbgirq_ctx[i], 0, THREAD_SIZE);
+ tp = dbgirq_ctx[i];
+ tp->cpu = i;
+ tp->preempt_count = 0;
+
+ memset((void *)mcheckirq_ctx[i], 0, THREAD_SIZE);
+ tp = mcheckirq_ctx[i];
+ tp->cpu = i;
+ tp->preempt_count = HARDIRQ_OFFSET;
+#endif
+ }
+}
+#endif
#ifdef CONFIG_IRQSTACKS
struct thread_info *softirq_ctx[NR_CPUS] __read_mostly;
memset((void *)softirq_ctx[i], 0, THREAD_SIZE);
tp = softirq_ctx[i];
tp->cpu = i;
- tp->preempt_count = SOFTIRQ_OFFSET;
+ tp->preempt_count = 0;
memset((void *)hardirq_ctx[i], 0, THREAD_SIZE);
tp = hardirq_ctx[i];
static inline void do_softirq_onstack(void)
{
struct thread_info *curtp, *irqtp;
+ unsigned long saved_sp_limit = current->thread.ksp_limit;
curtp = current_thread_info();
irqtp = softirq_ctx[smp_processor_id()];
irqtp->task = curtp->task;
+ current->thread.ksp_limit = (unsigned long)irqtp +
+ _ALIGN_UP(sizeof(struct thread_info), 16);
call_do_softirq(irqtp);
+ current->thread.ksp_limit = saved_sp_limit;
irqtp->task = NULL;
}
local_irq_restore(flags);
}
-EXPORT_SYMBOL(do_softirq);
/*
* IRQ controller and virtual interrupts
*/
-#ifdef CONFIG_PPC_MERGE
-
static LIST_HEAD(irq_hosts);
-static spinlock_t irq_big_lock = SPIN_LOCK_UNLOCKED;
-
+static DEFINE_SPINLOCK(irq_big_lock);
+static unsigned int revmap_trees_allocated;
+static DEFINE_MUTEX(revmap_trees_mutex);
struct irq_map_entry irq_map[NR_IRQS];
static unsigned int irq_virq_count = NR_IRQS;
static struct irq_host *irq_default_host;
-struct irq_host *irq_alloc_host(unsigned int revmap_type,
+irq_hw_number_t virq_to_hw(unsigned int virq)
+{
+ return irq_map[virq].hwirq;
+}
+EXPORT_SYMBOL_GPL(virq_to_hw);
+
+static int default_irq_host_match(struct irq_host *h, struct device_node *np)
+{
+ return h->of_node != NULL && h->of_node == np;
+}
+
+struct irq_host *irq_alloc_host(struct device_node *of_node,
+ unsigned int revmap_type,
unsigned int revmap_arg,
struct irq_host_ops *ops,
irq_hw_number_t inval_irq)
/* Allocate structure and revmap table if using linear mapping */
if (revmap_type == IRQ_HOST_MAP_LINEAR)
size += revmap_arg * sizeof(unsigned int);
- if (mem_init_done)
- host = kzalloc(size, GFP_KERNEL);
- else {
- host = alloc_bootmem(size);
- if (host)
- memset(host, 0, size);
- }
+ host = zalloc_maybe_bootmem(size, GFP_KERNEL);
if (host == NULL)
return NULL;
host->revmap_type = revmap_type;
host->inval_irq = inval_irq;
host->ops = ops;
+ host->of_node = of_node_get(of_node);
+
+ if (host->ops->match == NULL)
+ host->ops->match = default_irq_host_match;
spin_lock_irqsave(&irq_big_lock, flags);
host->inval_irq = 0;
/* setup us as the host for all legacy interrupts */
for (i = 1; i < NUM_ISA_INTERRUPTS; i++) {
- irq_map[i].hwirq = 0;
+ irq_map[i].hwirq = i;
smp_wmb();
irq_map[i].host = host;
smp_wmb();
/* Legacy flags are left to default at this point,
* one can then use irq_create_mapping() to
- * explicitely change them
+ * explicitly change them
*/
ops->map(host, i, i);
}
case IRQ_HOST_MAP_LINEAR:
rmap = (unsigned int *)(host + 1);
for (i = 0; i < revmap_arg; i++)
- rmap[i] = IRQ_NONE;
+ rmap[i] = NO_IRQ;
host->revmap_data.linear.size = revmap_arg;
smp_wmb();
host->revmap_data.linear.revmap = rmap;
*/
spin_lock_irqsave(&irq_big_lock, flags);
list_for_each_entry(h, &irq_hosts, link)
- if (h->ops->match == NULL || h->ops->match(h, node)) {
+ if (h->ops->match(h, node)) {
found = h;
break;
}
irq_virq_count = count;
}
+static int irq_setup_virq(struct irq_host *host, unsigned int virq,
+ irq_hw_number_t hwirq)
+{
+ /* Clear IRQ_NOREQUEST flag */
+ get_irq_desc(virq)->status &= ~IRQ_NOREQUEST;
+
+ /* map it */
+ smp_wmb();
+ irq_map[virq].hwirq = hwirq;
+ smp_mb();
+
+ if (host->ops->map(host, virq, hwirq)) {
+ pr_debug("irq: -> mapping failed, freeing\n");
+ irq_free_virt(virq, 1);
+ return -1;
+ }
+
+ return 0;
+}
+
+unsigned int irq_create_direct_mapping(struct irq_host *host)
+{
+ unsigned int virq;
+
+ if (host == NULL)
+ host = irq_default_host;
+
+ BUG_ON(host == NULL);
+ WARN_ON(host->revmap_type != IRQ_HOST_MAP_NOMAP);
+
+ virq = irq_alloc_virt(host, 1, 0);
+ if (virq == NO_IRQ) {
+ pr_debug("irq: create_direct virq allocation failed\n");
+ return NO_IRQ;
+ }
+
+ pr_debug("irq: create_direct obtained virq %d\n", virq);
+
+ if (irq_setup_virq(host, virq, virq))
+ return NO_IRQ;
+
+ return virq;
+}
+
unsigned int irq_create_mapping(struct irq_host *host,
irq_hw_number_t hwirq)
{
* host->ops->map() to update the flags
*/
virq = irq_find_mapping(host, hwirq);
- if (virq != IRQ_NONE) {
+ if (virq != NO_IRQ) {
+ if (host->ops->remap)
+ host->ops->remap(host, virq, hwirq);
pr_debug("irq: -> existing mapping on virq %d\n", virq);
return virq;
}
}
pr_debug("irq: -> obtained virq %d\n", virq);
- /* Clear IRQ_NOREQUEST flag */
- get_irq_desc(virq)->status &= ~IRQ_NOREQUEST;
-
- /* map it */
- smp_wmb();
- irq_map[virq].hwirq = hwirq;
- smp_mb();
- if (host->ops->map(host, virq, hwirq)) {
- pr_debug("irq: -> mapping failed, freeing\n");
- irq_free_virt(virq, 1);
+ if (irq_setup_virq(host, virq, hwirq))
return NO_IRQ;
- }
+
return virq;
}
EXPORT_SYMBOL_GPL(irq_create_mapping);
-extern unsigned int irq_create_of_mapping(struct device_node *controller,
- u32 *intspec, unsigned int intsize)
+unsigned int irq_create_of_mapping(struct device_node *controller,
+ u32 *intspec, unsigned int intsize)
{
struct irq_host *host;
irq_hw_number_t hwirq;
void irq_dispose_mapping(unsigned int virq)
{
- struct irq_host *host = irq_map[virq].host;
+ struct irq_host *host;
irq_hw_number_t hwirq;
- unsigned long flags;
+ if (virq == NO_IRQ)
+ return;
+
+ host = irq_map[virq].host;
WARN_ON (host == NULL);
if (host == NULL)
return;
switch(host->revmap_type) {
case IRQ_HOST_MAP_LINEAR:
if (hwirq < host->revmap_data.linear.size)
- host->revmap_data.linear.revmap[hwirq] = IRQ_NONE;
+ host->revmap_data.linear.revmap[hwirq] = NO_IRQ;
break;
case IRQ_HOST_MAP_TREE:
- /* Check if radix tree allocated yet */
- if (host->revmap_data.tree.gfp_mask == 0)
- break;
- /* XXX radix tree not safe ! remove lock whem it becomes safe
- * and use some RCU sync to make sure everything is ok before we
- * can re-use that map entry
+ /*
+ * Check if radix tree allocated yet, if not then nothing to
+ * remove.
*/
- spin_lock_irqsave(&irq_big_lock, flags);
+ smp_rmb();
+ if (revmap_trees_allocated < 1)
+ break;
+ mutex_lock(&revmap_trees_mutex);
radix_tree_delete(&host->revmap_data.tree, hwirq);
- spin_unlock_irqrestore(&irq_big_lock, flags);
+ mutex_unlock(&revmap_trees_mutex);
break;
}
EXPORT_SYMBOL_GPL(irq_find_mapping);
-unsigned int irq_radix_revmap(struct irq_host *host,
- irq_hw_number_t hwirq)
+unsigned int irq_radix_revmap_lookup(struct irq_host *host,
+ irq_hw_number_t hwirq)
{
- struct radix_tree_root *tree;
struct irq_map_entry *ptr;
unsigned int virq;
- unsigned long flags;
WARN_ON(host->revmap_type != IRQ_HOST_MAP_TREE);
- /* Check if the radix tree exist yet. We test the value of
- * the gfp_mask for that. Sneaky but saves another int in the
- * structure. If not, we fallback to slow mode
+ /*
+ * Check if the radix tree exists and has bee initialized.
+ * If not, we fallback to slow mode
*/
- tree = &host->revmap_data.tree;
- if (tree->gfp_mask == 0)
+ if (revmap_trees_allocated < 2)
return irq_find_mapping(host, hwirq);
- /* XXX Current radix trees are NOT SMP safe !!! Remove that lock
- * when that is fixed (when Nick's patch gets in
+ /* Now try to resolve */
+ /*
+ * No rcu_read_lock(ing) needed, the ptr returned can't go under us
+ * as it's referencing an entry in the static irq_map table.
*/
- spin_lock_irqsave(&irq_big_lock, flags);
+ ptr = radix_tree_lookup(&host->revmap_data.tree, hwirq);
- /* Now try to resolve */
- ptr = radix_tree_lookup(tree, hwirq);
- /* Found it, return */
- if (ptr) {
+ /*
+ * If found in radix tree, then fine.
+ * Else fallback to linear lookup - this should not happen in practice
+ * as it means that we failed to insert the node in the radix tree.
+ */
+ if (ptr)
virq = ptr - irq_map;
- goto bail;
- }
+ else
+ virq = irq_find_mapping(host, hwirq);
- /* If not there, try to insert it */
- virq = irq_find_mapping(host, hwirq);
- if (virq != NO_IRQ)
- radix_tree_insert(tree, hwirq, &irq_map[virq]);
- bail:
- spin_unlock_irqrestore(&irq_big_lock, flags);
return virq;
}
+void irq_radix_revmap_insert(struct irq_host *host, unsigned int virq,
+ irq_hw_number_t hwirq)
+{
+
+ WARN_ON(host->revmap_type != IRQ_HOST_MAP_TREE);
+
+ /*
+ * Check if the radix tree exists yet.
+ * If not, then the irq will be inserted into the tree when it gets
+ * initialized.
+ */
+ smp_rmb();
+ if (revmap_trees_allocated < 1)
+ return;
+
+ if (virq != NO_IRQ) {
+ mutex_lock(&revmap_trees_mutex);
+ radix_tree_insert(&host->revmap_data.tree, hwirq,
+ &irq_map[virq]);
+ mutex_unlock(&revmap_trees_mutex);
+ }
+}
+
unsigned int irq_linear_revmap(struct irq_host *host,
irq_hw_number_t hwirq)
{
{
unsigned long flags;
unsigned int i, j, found = NO_IRQ;
- unsigned int limit = irq_virq_count - count;
if (count == 0 || count > (irq_virq_count - NUM_ISA_INTERRUPTS))
return NO_IRQ;
/* Look for count consecutive numbers in the allocatable
* (non-legacy) space
*/
- for (i = NUM_ISA_INTERRUPTS; i <= limit; ) {
- for (j = i; j < (i + count); j++)
- if (irq_map[j].host != NULL) {
- i = j + 1;
- continue;
- }
- found = i;
- break;
+ for (i = NUM_ISA_INTERRUPTS, j = 0; i < irq_virq_count; i++) {
+ if (irq_map[i].host != NULL)
+ j = 0;
+ else
+ j++;
+
+ if (j == count) {
+ found = i - count + 1;
+ break;
+ }
}
if (found == NO_IRQ) {
spin_unlock_irqrestore(&irq_big_lock, flags);
static int irq_late_init(void)
{
struct irq_host *h;
- unsigned long flags;
+ unsigned int i;
- spin_lock_irqsave(&irq_big_lock, flags);
+ /*
+ * No mutual exclusion with respect to accessors of the tree is needed
+ * here as the synchronization is done via the state variable
+ * revmap_trees_allocated.
+ */
list_for_each_entry(h, &irq_hosts, link) {
if (h->revmap_type == IRQ_HOST_MAP_TREE)
- INIT_RADIX_TREE(&h->revmap_data.tree, GFP_ATOMIC);
+ INIT_RADIX_TREE(&h->revmap_data.tree, GFP_KERNEL);
}
- spin_unlock_irqrestore(&irq_big_lock, flags);
+
+ /*
+ * Make sure the radix trees inits are visible before setting
+ * the flag
+ */
+ smp_wmb();
+ revmap_trees_allocated = 1;
+
+ /*
+ * Insert the reverse mapping for those interrupts already present
+ * in irq_map[].
+ */
+ mutex_lock(&revmap_trees_mutex);
+ for (i = 0; i < irq_virq_count; i++) {
+ if (irq_map[i].host &&
+ (irq_map[i].host->revmap_type == IRQ_HOST_MAP_TREE))
+ radix_tree_insert(&irq_map[i].host->revmap_data.tree,
+ irq_map[i].hwirq, &irq_map[i]);
+ }
+ mutex_unlock(&revmap_trees_mutex);
+
+ /*
+ * Make sure the radix trees insertions are visible before setting
+ * the flag
+ */
+ smp_wmb();
+ revmap_trees_allocated = 2;
return 0;
}
arch_initcall(irq_late_init);
-#endif /* CONFIG_PPC_MERGE */
-
-#ifdef CONFIG_PCI_MSI
-int pci_enable_msi(struct pci_dev * pdev)
+#ifdef CONFIG_VIRQ_DEBUG
+static int virq_debug_show(struct seq_file *m, void *private)
{
- if (ppc_md.enable_msi)
- return ppc_md.enable_msi(pdev);
- else
- return -1;
+ unsigned long flags;
+ irq_desc_t *desc;
+ const char *p;
+ char none[] = "none";
+ int i;
+
+ seq_printf(m, "%-5s %-7s %-15s %s\n", "virq", "hwirq",
+ "chip name", "host name");
+
+ for (i = 1; i < NR_IRQS; i++) {
+ desc = get_irq_desc(i);
+ spin_lock_irqsave(&desc->lock, flags);
+
+ if (desc->action && desc->action->handler) {
+ seq_printf(m, "%5d ", i);
+ seq_printf(m, "0x%05lx ", virq_to_hw(i));
+
+ if (desc->chip && desc->chip->typename)
+ p = desc->chip->typename;
+ else
+ p = none;
+ seq_printf(m, "%-15s ", p);
+
+ if (irq_map[i].host && irq_map[i].host->of_node)
+ p = irq_map[i].host->of_node->full_name;
+ else
+ p = none;
+ seq_printf(m, "%s\n", p);
+ }
+
+ spin_unlock_irqrestore(&desc->lock, flags);
+ }
+
+ return 0;
}
-EXPORT_SYMBOL(pci_enable_msi);
-void pci_disable_msi(struct pci_dev * pdev)
+static int virq_debug_open(struct inode *inode, struct file *file)
{
- if (ppc_md.disable_msi)
- ppc_md.disable_msi(pdev);
+ return single_open(file, virq_debug_show, inode->i_private);
}
-EXPORT_SYMBOL(pci_disable_msi);
-void pci_scan_msi_device(struct pci_dev *dev) {}
-int pci_enable_msix(struct pci_dev* dev, struct msix_entry *entries, int nvec) {return -1;}
-void pci_disable_msix(struct pci_dev *dev) {}
-void msi_remove_pci_irq_vectors(struct pci_dev *dev) {}
-void disable_msi_mode(struct pci_dev *dev, int pos, int type) {}
-void pci_no_msi(void) {}
-EXPORT_SYMBOL(pci_enable_msix);
-EXPORT_SYMBOL(pci_disable_msix);
+static const struct file_operations virq_debug_fops = {
+ .open = virq_debug_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
-#endif
+static int __init irq_debugfs_init(void)
+{
+ if (debugfs_create_file("virq_mapping", S_IRUGO, powerpc_debugfs_root,
+ NULL, &virq_debug_fops) == NULL)
+ return -ENOMEM;
+
+ return 0;
+}
+__initcall(irq_debugfs_init);
+#endif /* CONFIG_VIRQ_DEBUG */
#ifdef CONFIG_PPC64
static int __init setup_noirqdistrib(char *str)
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff