x86: make 32bit use irq_cfg_alloc, etc
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu
Ingo Molnar
Родитель
a1420f395d
Коммит
da51a82131
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@ -94,41 +94,172 @@ DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES);
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static int disable_timer_pin_1 __initdata;
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struct irq_cfg;
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struct irq_cfg {
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unsigned int irq;
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struct irq_cfg *next;
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u8 vector;
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};
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/* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */
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static struct irq_cfg irq_cfg_legacy[] __initdata = {
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[0] = { .vector = FIRST_DEVICE_VECTOR, },
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[0] = { .irq = 0, .vector = IRQ0_VECTOR, },
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[1] = { .irq = 1, .vector = IRQ1_VECTOR, },
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[2] = { .irq = 2, .vector = IRQ2_VECTOR, },
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[3] = { .irq = 3, .vector = IRQ3_VECTOR, },
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[4] = { .irq = 4, .vector = IRQ4_VECTOR, },
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[5] = { .irq = 5, .vector = IRQ5_VECTOR, },
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[6] = { .irq = 6, .vector = IRQ6_VECTOR, },
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[7] = { .irq = 7, .vector = IRQ7_VECTOR, },
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[8] = { .irq = 8, .vector = IRQ8_VECTOR, },
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[9] = { .irq = 9, .vector = IRQ9_VECTOR, },
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[10] = { .irq = 10, .vector = IRQ10_VECTOR, },
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[11] = { .irq = 11, .vector = IRQ11_VECTOR, },
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[12] = { .irq = 12, .vector = IRQ12_VECTOR, },
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[13] = { .irq = 13, .vector = IRQ13_VECTOR, },
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[14] = { .irq = 14, .vector = IRQ14_VECTOR, },
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[15] = { .irq = 15, .vector = IRQ15_VECTOR, },
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};
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static void __init init_work(void *data)
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static struct irq_cfg irq_cfg_init = { .irq = -1U, };
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/* need to be biger than size of irq_cfg_legacy */
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static int nr_irq_cfg = 32;
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static int __init parse_nr_irq_cfg(char *arg)
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{
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struct dyn_array *da = data;
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struct irq_cfg *cfg;
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int legacy_count;
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int i;
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if (arg) {
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nr_irq_cfg = simple_strtoul(arg, NULL, 0);
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if (nr_irq_cfg < 32)
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nr_irq_cfg = 32;
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}
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return 0;
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}
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cfg = *da->name;
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early_param("nr_irq_cfg", parse_nr_irq_cfg);
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legacy_count = sizeof(irq_cfg_legacy)/sizeof(irq_cfg_legacy[0]);
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BUG_ON(legacy_count > nr_irqs);
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memcpy(cfg, irq_cfg_legacy, sizeof(irq_cfg_legacy));
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static void init_one_irq_cfg(struct irq_cfg *cfg)
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{
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memcpy(cfg, &irq_cfg_init, sizeof(struct irq_cfg));
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}
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static struct irq_cfg *irq_cfgx;
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DEFINE_DYN_ARRAY(irq_cfgx, sizeof(struct irq_cfg), nr_irqs, PAGE_SIZE, init_work);
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static struct irq_cfg *irq_cfgx_free;
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static void __init init_work(void *data)
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{
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struct dyn_array *da = data;
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struct irq_cfg *cfg;
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int legacy_count;
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int i;
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cfg = *da->name;
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memcpy(cfg, irq_cfg_legacy, sizeof(irq_cfg_legacy));
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legacy_count = sizeof(irq_cfg_legacy)/sizeof(irq_cfg_legacy[0]);
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for (i = legacy_count; i < *da->nr; i++)
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init_one_irq_cfg(&cfg[i]);
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for (i = 1; i < *da->nr; i++)
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cfg[i-1].next = &cfg[i];
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irq_cfgx_free = &irq_cfgx[legacy_count];
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irq_cfgx[legacy_count - 1].next = NULL;
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}
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#define for_each_irq_cfg(cfg) \
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for (cfg = irq_cfgx; cfg; cfg = cfg->next)
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DEFINE_DYN_ARRAY(irq_cfgx, sizeof(struct irq_cfg), nr_irq_cfg, PAGE_SIZE, init_work);
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static struct irq_cfg *irq_cfg(unsigned int irq)
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{
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if (irq >= nr_irqs)
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return NULL;
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struct irq_cfg *cfg;
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return &irq_cfgx[irq];
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cfg = irq_cfgx;
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while (cfg) {
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if (cfg->irq == irq)
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return cfg;
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cfg = cfg->next;
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}
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return NULL;
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}
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static struct irq_cfg *irq_cfg_alloc(unsigned int irq)
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{
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struct irq_cfg *cfg, *cfg_pri;
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int i;
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int count = 0;
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cfg_pri = cfg = irq_cfgx;
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while (cfg) {
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if (cfg->irq == irq)
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return cfg;
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cfg_pri = cfg;
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cfg = cfg->next;
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count++;
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}
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if (!irq_cfgx_free) {
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unsigned long phys;
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unsigned long total_bytes;
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/*
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* we run out of pre-allocate ones, allocate more
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*/
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printk(KERN_DEBUG "try to get more irq_cfg %d\n", nr_irq_cfg);
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total_bytes = sizeof(struct irq_cfg) * nr_irq_cfg;
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if (after_bootmem)
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cfg = kzalloc(total_bytes, GFP_ATOMIC);
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else
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cfg = __alloc_bootmem_nopanic(total_bytes, PAGE_SIZE, 0);
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if (!cfg)
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panic("please boot with nr_irq_cfg= %d\n", count * 2);
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phys = __pa(cfg);
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printk(KERN_DEBUG "irq_irq ==> [%#lx - %#lx]\n", phys, phys + total_bytes);
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for (i = 0; i < nr_irq_cfg; i++)
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init_one_irq_cfg(&cfg[i]);
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for (i = 1; i < nr_irq_cfg; i++)
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cfg[i-1].next = &cfg[i];
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irq_cfgx_free = cfg;
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}
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cfg = irq_cfgx_free;
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irq_cfgx_free = irq_cfgx_free->next;
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cfg->next = NULL;
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if (cfg_pri)
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cfg_pri->next = cfg;
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else
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irq_cfgx = cfg;
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cfg->irq = irq;
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printk(KERN_DEBUG "found new irq_cfg for irq %d\n", cfg->irq);
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#ifdef CONFIG_HAVE_SPARSE_IRQ_DEBUG
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{
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/* dump the results */
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struct irq_cfg *cfg;
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unsigned long phys;
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unsigned long bytes = sizeof(struct irq_cfg);
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printk(KERN_DEBUG "=========================== %d\n", irq);
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printk(KERN_DEBUG "irq_cfg dump after get that for %d\n", irq);
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for_each_irq_cfg(cfg) {
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phys = __pa(cfg);
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printk(KERN_DEBUG "irq_cfg %d ==> [%#lx - %#lx]\n", cfg->irq, phys, phys + bytes);
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}
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printk(KERN_DEBUG "===========================\n");
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}
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#endif
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return cfg;
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}
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/*
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@ -254,6 +385,7 @@ static void add_pin_to_irq(unsigned int irq, int apic, int pin)
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{
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struct irq_pin_list *entry = irq_2_pin + irq;
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irq_cfg_alloc(irq);
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while (entry->next)
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entry = irq_2_pin + entry->next;
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@ -836,11 +968,13 @@ static int __assign_irq_vector(int irq)
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{
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static int current_vector = FIRST_DEVICE_VECTOR, current_offset;
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int vector, offset;
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struct irq_cfg *cfg;
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BUG_ON((unsigned)irq >= nr_irqs);
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if (irq_cfg(irq)->vector > 0)
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return irq_cfg(irq)->vector;
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cfg = irq_cfg(irq);
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if (cfg->vector > 0)
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return cfg->vector;
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vector = current_vector;
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offset = current_offset;
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@ -857,7 +991,7 @@ next:
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current_vector = vector;
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current_offset = offset;
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irq_cfg(irq)->vector = vector;
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cfg->vector = vector;
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return vector;
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}
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@ -1659,6 +1793,7 @@ static inline void init_IO_APIC_traps(void)
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{
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int irq;
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struct irq_desc *desc;
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struct irq_cfg *cfg;
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/*
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* NOTE! The local APIC isn't very good at handling
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@ -1671,8 +1806,9 @@ static inline void init_IO_APIC_traps(void)
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* Also, we've got to be careful not to trash gate
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* 0x80, because int 0x80 is hm, kind of importantish. ;)
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*/
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for (irq = 0; irq < nr_irqs ; irq++) {
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if (IO_APIC_IRQ(irq) && !irq_cfg(irq)->vector) {
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for_each_irq_cfg(cfg) {
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irq = cfg->irq;
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if (IO_APIC_IRQ(irq) && !cfg->vector) {
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/*
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* Hmm.. We don't have an entry for this,
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* so default to an old-fashioned 8259
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@ -2117,14 +2253,18 @@ int create_irq(void)
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/* Allocate an unused irq */
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int irq, new, vector = 0;
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unsigned long flags;
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struct irq_cfg *cfg_new;
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irq = -ENOSPC;
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spin_lock_irqsave(&vector_lock, flags);
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for (new = (nr_irqs - 1); new >= 0; new--) {
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if (platform_legacy_irq(new))
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continue;
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if (irq_cfg(new)->vector != 0)
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cfg_new = irq_cfg(new);
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if (cfg_new && cfg_new->vector != 0)
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continue;
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if (!cfg_new)
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cfg_new = irq_cfg_alloc(new);
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vector = __assign_irq_vector(new);
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if (likely(vector > 0))
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irq = new;
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